wireless network communication method, devices, and system

专利摘要:
the present invention relates to a method of communication over a wireless network, devices, and system. the method of communication on the wireless network includes: establishing, through a terminal device, double connections for a first access network device and a second access network device, where a connection between the terminal device and the first device access network, included in the double connections is an rrc radio resource control connection; receive, by the terminal device, first configuration information sent by the first access network device, where the first configuration information includes srb signaling radio bearer configuration information from the second access network device and a trigger condition to use the srb configuration information; and when the trigger condition is met, use, by the terminal device, the srb configuration information from the second access network device to establish an RC connection to the second access network device. this speeds up the restoration of a dual connectivity work mode, thereby meeting a low latency requirement.
公开号:BR112019017284A2
申请号:R112019017284
申请日:2018-03-21
公开日:2020-04-28
发明作者:Yu Feng；Yu Haifeng；Xiong Xin
申请人:Huawei Tech Co Ltd；
IPC主号:

专利说明:

Invention Patent Descriptive Report for WIRELESS COMMUNICATION METHOD, DEVICES, AND SYSTEM.
[001] This application claims priority of Chinese Patent Application Number 201710184934.9, filed with the Chinese Patent Office on March 24, 2017 and entitled WIRELESS COMMUNICATION METHOD, DEVICE, AND SYSTEM, which is incorporated by reference in your totality.
TECHNICAL FIELD [002] This application refers to the field of communications technologies, and specifically, a method of communication over a wireless network, a device, and a system.
BACKGROUND [003] In mobile communications 4th generation (fourth generation, 4G), the reliability of a radio resource control connection (Radio Resource Control, RRC) is a basis to ensure the exchange of information between a control plan and a user plan. A radio connection problem causes an unreliable RRC connection, affecting the quality of communication. To ensure RRC connection reliability, a dual connectivity architecture (Dual Connectivity, DC) is introduced in 4G mobile communications. Using a long-term evolution system (Long Term Evolution, LTE) as an example, in a DC architecture, a terminal device can establish communication connections to either a master access network device (for example, a master eNodeB MeNB (eNB Master)) and a secondary access network device (for example, a secondary SeNB eNodeB (Secondary eNB)). The master access network device is responsible for managing mobility and offloading data packets from the terminal device. The access network device is
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2/59 secondary is configured to help the master access network device perform some data services. In the existing dual connectivity architecture, the terminal device can support only one RRC state. To be specific, the terminal device can establish an RRC connection to only one access network device, while maintaining a communication connection with the other access network device. The communication connection is a non-RRC connection. The master access network device usually needs to exchange control and data signaling with the terminal device, and therefore the terminal device establishes an RRC connection with the master access network device. The secondary access network device only exchanges data with the terminal device and therefore the secondary access network device maintains a communication connection with the terminal device.
[004] As the mobile wireless communications 4G enter a phase of large-scale commercial use, mobile communications 5th generation (Generation 5, 5G) have become a popular issue of global research and development. One type of application scenario in 5G mobile communications is ultra-reliable and low-latency communications (Ultra-reliable and Low-Latency Communications, URLLC). URLLC services have an extremely strict latency requirement for a user plan and a control plan. In 3GPP TR 38.913, latency requirements are described as follows:
- a target latency over a control plane is 10 ms;
- in a user plan, a target latency is 0.5 ms in uplink and 0.5 ms in downlink; and
- a target interruption latency is 0 ms during the movement.
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3/59 [005] From the above descriptions, it can be learned that URLLC services usually require data to be transmitted as soon as possible once the data is generated. The unreliability of the RRC connection can cause data transmission interruption, resulting in an interruption latency. In addition, some URLLC services need to use high frequency communication. In high frequency communication, a channel disappears quickly. Consequently, for such services, the RRC connection unreliability caused by a radio connection problem is worse due to the impact of a high frequency.
[006] In 5G communications, the above dual connectivity architecture is still used to ensure better communication quality. However, an issue with the existing dual connectivity architecture is: A terminal device maintains an RRC connection only for a master access network device; when a radio connection failure (Radio Connection Failure, RLF) occurs between the terminal device and the master access network device, the master access network device cannot continue to perform mobility management and offloading of data packet from the terminal device, and as there is no RRC connection between a secondary access network device and the terminal device, the secondary access network device cannot complete the above work, either. As a result, once an RLF occurs on the master access network device, it is considered that the RLF occurs on both double connections. In this case, none of the primary access network device and the secondary access network device can provide a service for the terminal device. To restore a normal dual connectivity work mode, the terminal device needs to search for a new master access network device to res
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4/59 establish a RRC connection, and re-add the secondary access network device or change the secondary access network device.
[007] However, data transmission is temporarily interrupted during the reestablishment of RRC connection between the terminal device and the master access network device. This causes data interruption latency, which is undesirable for a URLLC service. In addition, the addition or change of a secondary access network device needs to be completed through a RRC connection reestablishment process, and consequently, a restoration time for dual connectivity architectures is prolonged. This is unfavorable for implementing target performance of a URLLC service. Therefore, a latency brought about by an existing dual connection restoration process cannot meet a requirement for a 5G mobile service, specifically a low latency requirement for a URLLC service.
SUMMARY [008] The modalities of the present invention provide a method of communication on a wireless network, a device, and a system, to establish a RRC connection to a secondary access network device when the quality of a radio connection between a terminal device and a master access network device is relatively bad, and accelerating the restoration of a dual connectivity working mode while maintaining data transmission, thereby meeting a low latency requirement.
[009] According to one aspect, an embodiment of the present invention provides a method of communication over a wireless network. The method includes: establishing, through a terminal device, double connections for a first access network device and a second
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5/59 access network device, where a connection, between the terminal device and the first access network device, included in the double connections is an RRC connection; receive, by the terminal device, first configuration information sent by the first access network device, where the first configuration information includes SRB signaling radio bearer configuration information from the second access network device and a trigger condition for use the SRB configuration information, and when the trigger condition is met, use, by the terminal device, the SRB configuration information from the second access network device to establish an RRC connection to the second access network device access. According to the method provided in this modality, when the trigger condition is met, the terminal device uses the SRB configuration information obtained from the second access network device to establish the RRC connection to the second network device access. This can speed up RRC connection restoration, and shorten the latency of restoring a dual-connect working mode. In addition, transmission is not interrupted in a dual connection restoration process. Therefore, a low latency requirement is met.
[0010] In a possible project, the terminal device receives the RRC connection reconfiguration information sent by the first access network device, where the RRC connection reconfiguration information includes the first configuration information.
[0011] In a possible project, before the terminal device uses the SRB configuration information of the second access network device to establish an RRC connection to the second access network device, the method also includes:
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6/59 receive, by the terminal device, the first instruction information sent by the first access network device, where the first instruction information instructs the terminal device to use the SRB configuration information of the second access network device to establish the RRC connection to the second access network device. In this mode, without being limited by the trigger condition, the first access network device can instruct, based on information such as a charge status from the first access network device, the terminal device to establish the RRC connection for the second access network device.
[0012] In a possible project, the method also includes: receiving, through the terminal device, second configuration information sent by the second access network device, where the second configuration information includes configuration information from a third network device access; and using, by the terminal device, the configuration information of the third access network device to establish a communication connection to the third access network device.
[0013] In a possible project, the method also includes: receiving, by the terminal device, a first message sent by the second access network device, where the first message includes identification information of a fourth access network device; establishing, by the terminal device, an RRC connection to the fourth access network device based on the identification information of the fourth access network device; and receiving, by the terminal device, an RRC connection release message sent by the second access network device or the fourth access network device.
[0014] In a possible project, the method still includes: determining,
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7/59 by the terminal device, a fifth access network device; establish, through the terminal device, an RRC connection to the fifth access network device; and receiving, by the terminal device, an RRC connection release message sent by the second access network device or the fifth access network device.
[0015] In a possible project, the method also includes: when the first configuration information of the second access network device meets a first condition, discard, by the terminal device, the first configuration information.
[0016] In a possible project, the first condition includes at least one of the following conditions:
the terminal device does not use the first configuration information within a predetermined time;
the terminal device receives second instruction information sent by the first access network device, where the second instruction information instructs the terminal device to discard the first configuration information; and the terminal device receives a second message sent by the first access network device, where the second message includes the first updated configuration information.
[0017] According to another aspect, an embodiment of the present invention provides a method of communication over a wireless network. The method includes: establishing, by a first access network device, an RRC radio resource control connection to a terminal device, where the RRC connection is one of double connections, and the double connections still include a connection of communication between the terminal device and a second access network device; and send, by the first access network device, first
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8/59 first configuration information for the terminal device, where the first configuration information includes SRB signaling radio bearer configuration information from the second access network device and a trigger condition to use the SRB configuration information , and the SRB configuration information of the second access network device is used by the terminal device to establish an RRC connection to the second access network device when the trigger condition is met. According to the method provided in this embodiment, the first access network device can send the SRB configuration information of the second access network device and the trigger condition to the terminal device in advance. In this mode, when the trigger condition is met, the terminal device can use the SRB configuration information from the second access network device to quickly restore the RRC connection, thereby shortening the latency of restoring a working mode. dual connectivity. In addition, transmission is not interrupted in a dual connection restoration process. Therefore, a low latency requirement is met.
[0018] In a possible project, the method also includes: sending, by the first access network device, first instruction information to the terminal device, where the first instruction information instructs the terminal device to use the configuration information of the second access network device to establish the RRC connection to the second access network device.
[0019] In a possible project, the method also includes: adjusting, by the first access network device, a predetermined time for the first configuration information, where the predetermined time is used by the terminal device to discard the pri
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9/59 first configuration information when the first configuration information is not used within the predetermined time; or send, through the first access network device, second instruction information to the terminal device, where the second instruction information instructs the terminal device to discard the first configuration information; or send, via the first access network device, a second message to the terminal device, where the second message includes first updated configuration information.
[0020] In accordance with yet another aspect, an embodiment of the present invention provides a method of communication over a wireless network. The method includes: establishing, through a second access network device, a communication connection to a terminal device, where the communication connection is one of double connections, and the double connections still include a radio resource control connection RRC between the terminal device and a first access network device; and establishing, by the second access network device, an RRC connection to the terminal device when a trigger condition is met, where the RRC connection is established using SRB configuration information from the second access network device, and the SRB configuration information of the second access network device and the trigger condition is sent by the first access network device to the terminal device using the first configuration information. According to the method provided in this mode, when the trigger condition is met, the terminal device can use the SRB configuration information from the second access network device to quickly restore the RRC connection, and the second network device access changes to a master access network device and temporarily or permanently
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10/59 mind serves as the master access network device. This avoids transmission interruption in a dual connection restoration process, and shortens the latency of restoring a dual connectivity working mode, thereby meeting a low latency requirement.
[0021] In a possible project, the method also includes: sending, by the second access network device, a request for addition to a third access network device; receive, by the second access network device, a confirmation of an add request sent by the third access network device; configure, by the second access network device, the third access network device, and send a complete configuration message to the third access network device; and sending, through the second access network device, second configuration information to the terminal device, where the second configuration information includes configuration information from the third access network device, and the second configuration information is used by the access device. terminal to establish a communication connection to the third access network device.
[0022] In a possible project, the method also includes: determining, by the second access network device, a fourth access network device; and sending, by the second access network device, a first message to the terminal device, where the first message includes identification information of the fourth access network device, and the identification information of the fourth access network device is used by the terminal device to establish an RRC connection to the fourth access network device.
[0023] In a possible project, the method also includes: sending, via the second access network device, a release message
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11/59 RRC connection to the terminal device.
[0024] In accordance with yet another aspect, an embodiment of the present invention provides a terminal device, which includes a processing unit and a transceiver unit. The processing unit is configured to control the terminal device to establish double connections for a first access network device and a second access network device, where a connection between the terminal device and the first access network device , included in the double connections is an RRC radio resource control connection. The transceiver unit is configured to receive first configuration information sent by the first access network device, where the first configuration information includes SRB signaling radio bearer configuration information from the second access network device and a trigger condition. to use the SRB configuration information. When the trigger condition is met, the processing unit is further configured to control the terminal device to use the SRB configuration information from the second access network device to establish an RRC connection to the second access network device .
[0025] In a possible project, the transceiver unit is still configured to receive first instruction information sent by the first access network device, where the first instruction information instructs the terminal device to use the SRB configuration information of the second access network device to establish the RRC connection to the second access network device.
[0026] In a possible project, the transceiver unit is still configured to receive second configuration information sent by the second access network device, where the second
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12/59 of the configuration information includes configuration information for a third access network device; and the processing unit is further configured to control the terminal device to use the configuration information from the third access network device to establish a communication connection to the third access network device.
[0027] In a possible project, the transceiver unit is still configured to receive a first message sent by the second access network device, where the first message includes identification information of a fourth access network device; the processing unit is further configured to control, based on the identification information of the fourth access network device, the terminal device for establishing an RRC connection to the fourth access network device; and the transceiver unit is further configured to receive an RRC connection release message sent by the second access network device or the fourth access network device.
[0028] In a possible project, the processing unit is still configured to determine a fifth access network device; the processing unit is further configured to control the terminal device to establish an RRC connection to the fifth access network device; and the transceiver unit is further configured to receive an RRC connection release message sent by the second access network device or the fifth access network device.
[0029] In a possible project, when the first configuration information meets a first condition, the processing unit is still configured to discard the first configuration information.
[0030] In a possible project, the terminal device can print
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13/59 additional, using hardware, functions performed by the terminal device in the method above. A terminal device structure can include a transceiver and a processor. The transceiver can implement functions of the transceiver unit, and the processor can implement functions of the processing unit.
[0031] In a possible project, the terminal device can implement, alternatively using hardware running corresponding software, functions performed by the terminal device in the above method. The hardware or software includes one or more modules that correspond to the above functions. The modules can be software and / or hardware.
[0032] In accordance with yet another aspect, an embodiment of the present invention provides an access network device, which includes a processing unit and a transceiver unit. The processing unit is configured to control the access network device to establish an RRC radio resource control connection to a terminal device using the transceiver unit, where the RRC connection is one of double connections, and the double connections further include a communication connection between the terminal device and a second access network device. The transceiver unit is configured to send first configuration information to the terminal device, where the first configuration information includes SRB signaling radio bearer configuration information from the second access network device and a trigger condition to use the SRB configuration information, and the SRB configuration information of the second access network device is used by the terminal device to establish an RRC connection to the second access network device when the trigger condition is met.
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14/59 [0033] In a possible project, the access network device can implement, using hardware, functions performed by the access network device in the above method. An access network device structure can include a processor and a transceiver. The processor can implement functions of the processing unit. The transceiver can implement functions of the transceiver unit.
[0034] In a possible project, the access network device can implement, alternatively using hardware running corresponding software, functions performed by the access network device in the above method. The hardware or software includes one or more modules that correspond to the above functions. The modules can be software and / or hardware.
[0035] According to a further aspect, an embodiment of the present invention provides an access network device, which includes a processing unit and a transceiver unit. The processing unit is configured to control the access network device to establish a communication connection to a terminal device using the transceiver unit, where the communication connection is one of double connections, and the double connections still include one connection radio resource control control between the terminal device and a first access network device. When a trigger condition is met, the processing unit is further configured to control the second access network device to establish an RRC connection to the terminal device, where the RRC connection is established using the SRB configuration information of the second access network device, and the SRB configuration information of the second access network device and the trigger condition are sent by the first access network device to the
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15/59 terminal device using the first configuration information.
[0036] In a possible project, the access network device can implement, using hardware, functions performed by the access network device in the above method. An access network device structure can include a processor and a transceiver. The processor can implement functions of the processing unit. The transceiver can implement functions of the transceiver unit.
[0037] In a possible project, the access network device can implement, alternatively using hardware running corresponding software, functions performed by the access network device in the above method. The hardware or software includes one or more modules that correspond to the above functions. The modules can be software and / or hardware.
[0038] For the above aspects, in a possible project, the trigger condition includes at least one of the following conditions:
an RLF radio connection failure occurs between the terminal device and the first access network device;
the quality of a radio connection between the terminal device and the first access network device is lower than a first limit;
the quality of a radio connection between the terminal device and the second access network device is higher than a second limit;
the quality of the radio connection between the terminal device and the second access network device is higher than a third limit, and a value by which the quality of the radio connection between the terminal device and the second network device access is higher than the quality of the radio connection between the
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16/59 terminal device and the first access network device is greater than a fourth limit;
the quality of the radio connection between the terminal device and the first access network device is lower than a fifth limit, and the quality of the radio connection between the terminal device and the second access network device is more higher than a sixth limit; and the quality of the radio connection between the terminal device and the first access network device is lower than a seventh limit, and the value by which the quality of the radio connection between the terminal device and the second access device access network is higher than the quality of the radio connection between the terminal device and the first access network device is greater than an eighth limit.
[0039] For the above aspects, in a possible project, the SRB configuration information includes SRBO configuration information, or SRBO configuration information and SRB1 configuration information, and a type of SRB is a group carrier of secondary SCG cells or a divided carrier.
[0040] For the above aspects, in a possible project, the first configuration information still includes random access configuration information, and the random access configuration information is used by the terminal device to start, for the second network device access, a random access process for establishing RRC connection.
[0041] For the above aspects, in a possible project, the first configuration information still includes measurement configuration information, and the measurement configuration information is used by the terminal device to determine, based on a result obtained by performing measurement using the information
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17/59 measurement setup, if the trigger condition is met. [0042] In a still further aspect, an embodiment of the present invention provides a computer-readable storage medium, where a computer program is stored in a computer-readable storage medium, and when the program is executed by a processor, the method steps in the above aspects are implemented.
[0043] According to a still further aspect, an embodiment of the present invention provides a communications system, where the system includes the terminal device and the access network device of the above aspects.
[0044] In a still further aspect, an embodiment of the present invention provides a computer storage medium, configured to store a computer software instruction used by the above terminal device. The computer software instruction includes a program designed to control the terminal device to implement the above aspect.
[0045] In accordance with yet another aspect, an embodiment of the present invention provides a computer storage medium, configured to store a computer software instruction used by the above access network device. The computer software instruction includes a program designed to control the network access device to implement the above aspect. [0046] According to the technical solutions provided in the modalities of the present invention, the first access network device sends the SRB configuration information of the second access network device and the trigger condition to the terminal device in advance. When the trigger condition is met, the terminal device uses the SRB configuration information from the second access network device to establish the connection
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18/59 RRC for the second access network device. This can speed up RRC connection restoration and shorten the latency of restoring a dual-connect working mode. In addition, transmission is not interrupted in a dual connection restoration process. Therefore, a low latency requirement is met. DESCRIPTION OF THE DRAWINGS [0047] Figure 1 is a schematic diagram of a communications system according to an embodiment of the present invention; [0048] Figure 2 is a schematic diagram of establishing RRC connection according to an embodiment of the present invention;
[0049] Figure 3 is a schematic diagram of adding a secondary access network device according to an embodiment of the present invention;
[0050] Figure 4 is a schematic diagram of a method of communication on a wireless network according to an embodiment of the present invention;
[0051] Figure 5 is a possible structural schematic diagram of a terminal device according to an embodiment of the present invention;
[0052] Figure 6 is another possible structural schematic diagram of a terminal device according to an embodiment of the present invention;
[0053] Figure 7 is a possible schematic structural diagram of an access network device according to another embodiment of the present invention;
[0054] Figure 8 is another possible schematic structural diagram of an access network device according to an embodiment of the present invention;
[0055] Figure 9 is a possible schematic structural diagram of
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19/59 a network device according to another embodiment of the present invention; and [0056] Figure 10 is another possible schematic structural diagram of a network device according to an embodiment of the present invention.
DESCRIPTION OF MODALITIES [0057] The following describes the technical solutions in modalities of the present invention with reference to the accompanying drawings.
[0058] The technical solutions proposed in the modalities of the present invention are based on a communications system 100 shown in Figure 1. The communications system 100 can support a service that has a low latency requirement, for example, a URLLC service. It can be understood that the communications system 100 also supports a data service that has a conventional latency requirement. The communications system 100 includes at least two access network devices and at least one terminal device. As shown in Figure 1, communications system 100 includes, for example, access network devices 10 and 20 and a terminal device 30. Access network devices 10 and 20 and terminal device 30 establish a DC architecture . Access network device 10 is a master access network device, and access network device 20 is a secondary access network device. Access network device 10 establishes an RRC connection to terminal device 30 to transmit control and data information. The access network device 10 establishes a communication connection to the terminal device 30, to assist the access network device 10 in data transmission. Access network device 10 communicates with access network device 20 using an X2 interface.
[0059] It should be understood that, in this modality of the present
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20/59 invention, the communications system 100 can be a global system system for mobile communications (Global Mobile Communication System, GSM), a code division multiple access system (Code Division Multiple Access, CDMA), a broadband code division multiple access system (Broadband Code Division Multiple Access, WCDMA), a general packet radio service system (General Packet Radio Service, GPRS), an evolution system long term (Long Term Evolution, LTE), an LTE frequency division duplex system (Frequency Division Duplex, FDD), and an LTE time division duplex system (Time Division Duplex, TDD), a universal mobile telecommunications system (Universal Mobile Telecommunication System, UMTS), another wireless communications system that applies orthogonal frequency division (OFDM) multiplexing technology, or similar. In addition, communications system 100 may also be applicable to 5G mobile communications. A system architecture and service scenario that are described in the embodiments of the present invention are intended to describe the technical solutions in the embodiments of the present invention more clearly, and do not constitute any limitation on the technical solutions provided in the embodiments of the present invention. A person skilled in the art may be aware that as network architectures evolve and new service scenarios emerge, the technical solutions provided in the modalities of the present invention are also applicable to similar technical problems.
[0060] In this embodiment of the present invention, the terminal device can also be referred to as user equipment (User Equipment, UE), a mobile station (Mobile Station, MS), a mobile terminal (Mobile Terminal), or the like. The terminal device can communicate with one or more core networks using
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21/59 using a radio access network (Radio Access Network, RAN). For example, the terminal device can be a mobile phone (also referred to as a cell phone), or a computer that has a mobile terminal. For example, the terminal device may alternatively be a portable mobile device, a pocket mobile device, a handheld mobile device, a mobile device incorporated into a computer, or a mobile device in a vehicle, which exchanges voice and / or data with the network radio access.
[0061] In this embodiment of the present invention, the access network device can be a base transceiver station (Base Transceiver Station, BTS) in GSM or CDMA, it can be a NodeB (NodeB, NB) in WCDMA, it can be a developed NodeB (Evolutionary Node B, eNB or e-NodeB) in LTE, or it can even be a new generation access network device in a 5G system. In this embodiment of the present invention, the access network device and the terminal device are not specifically limited.
[0062] It should be noted that a number of terminal devices included in the communication system 100 shown in Figure 1 is merely an example, and this embodiment of the present invention is not limited to this. For example, more terminal devices that communicate with the access network device can still be included, and for the sake of brevity, they are not shown one by one in the accompanying drawings. In addition, although the access network device 10, the access network device 20, and the terminal device 30 are shown in the communication system 100 shown in Figure 1, the communication system 100 may not only include the communication devices access network and the terminal device, but also include, for example, a core network device or a device configured to perform a network function
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22/59 virtualized. This is obvious to a person skilled in the art and is not described in detail here.
[0063] As described above, in a dual connectivity architecture, a terminal device can maintain communication connections to two access network devices simultaneously, and the two access network devices are a master access network device and a secondary access network device. The master access network device and the secondary access network device each can have an RRC entity. However, the terminal device can support an RRC state. Therefore, the terminal device establishes an RRC connection only for the master access network device. The terminal device establishes a communication connection to the secondary access network device. The communication connection is a non-RRC connection. The communication connection like the non-RRC connection can include a carrier aggregation connection (Carrier Aggregation, CA), a multiple beam (beam) or transmission reception point connection (Transmission Reception Point, TRP), a multi-panel connection, and the like. It can be understood that the communication connection as the non-RRC connection can also include other connection modes that can be supported by a current mobile communications system and a 5G mobile communications system. This is not specifically limited here. Then, the master access network device establishes the DC architecture with the terminal device adding the secondary access network device.
[0064] A process of establishing an RRC connection to the master access network device by the terminal device can be implemented through random access. A signal in the RRC connection establishment process is sent over
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23/59 signaling radio bearers (Signaling Radio Bearer, SRB). The SRBs used in the RRC connection establishment process mainly include an SRBO and an SRB1. Figure 2 shows a simple process of establishing the RRC connection to the master access network device by the terminal device. The process mainly includes the following steps.
[0065] S201: The terminal device sends a preamble (preamble) to the master access network device.
[0066] The master access network device can allocate the preamble to the terminal device based on contention-based random access or non-contention based random access. The master access network device still allocates, for the terminal device, an uplink resource used for random access.
[0067] S202: The master access network device returns a random access response (Random Access Response, RAR) to the terminal device after receiving the preamble.
[0068] S203: After receiving the RAR, the terminal device sends a RRC RRCConnectionRequest connection request message to the master access network device using the SRBO.
[0069] S204: The master access network device sends an RRC connection configuration message RRCConnectionSetup to the terminal device using the SRBO, where the RRC connection configuration message includes SRB1 configuration information.
[0070] S205: The terminal device sends a complete RRC connection configuration message RRCConnectionSetupComplete to the master access network device using SRB1, and the master access network device establishes an interPetition 870190080721, 08/20 / 2019, p. 47/114
24/59 face S1 based on the complete RRC connection configuration message.
[0071] The terminal device establishes the RRC connection to the master access network device by performing the above process. The master access network device can exchange control and data information with the terminal device via the RRC connection.
[0072] Then, the master access network device needs to add the secondary access network device for data download. Figure 3 shows a simple process of adding the secondary access network device via the master access network device. The process mainly includes the following steps.
[0073] S301: The master access network device (for example, MeNB) sends a request for adding a secondary access network device (Request to add SeNB) to the secondary access network device (for example, SeNB ).
[0074] The request for adding a secondary access network device includes configuration information for the secondary access network device.
[0075] S302: After receiving the configuration information, the secondary access network device responds with confirmation information (Confirmation, ACK) if the configuration is accepted.
[0076] S303: After receiving the ACK, the master access network device adds information about the secondary access network device to an RRC connection reconfiguration message RRCConnectionReconfiguration, and sends the RRC connection reconfiguration message to the terminal device.
[0077] Information about the secondary access network device includes configuration information for the secondary access network device and configuration information that is
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25/59 used by the terminal device to initiate random access to the secondary access network device.
[0078] S304: The terminal device performs reconfiguration after receiving the RRC connection reconfiguration message, and sends a complete RRC connection reconfiguration message RRCConnectionReconfigurationComplete to the master access network device.
[0079] S305: The master access network device sends a complete secondary access network device reconfiguration message (Complete SeNB Reset) to the secondary access network device.
[0080] S306: The terminal device uses the configuration information of the secondary access network device in the RRC connection reconfiguration message to initiate a random access to the secondary access network device, in order to establish the connection of Communication.
[0081] The terminal device completes the establishment of the dual connectivity architecture with the master access network device and the secondary access network device through the above process.
[0082] In the existing dual connectivity architecture, an RLF can occur between the master access network device and the terminal device. The terminal device establishes the RRC connection only for the master access network device, and maintains only the communication connection but no RRC connection for the secondary access network device. Therefore, when an RLF occurs between the terminal device and the master access network device, an RLF is considered to occur on both connections of the dual connectivity architecture. In this case, the terminal device needs to search for a new network device.
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26/59 master access to reestablish an RRC connection. Then, the new master access network device adds the original secondary access network device or a new secondary access network device to restore the dual connectivity architecture.
[0083] However, during the reestablishment of RRC connection, data is not transmitted neither between the terminal device and the master access network device nor between the terminal device and the secondary access network device, that is, data transmission is interrupted. During RRC connection re-establishment, a large amount of signaling is exchanged, and a large latency is caused. Consequently, a relatively large interrupt latency is caused. To restore the dual connectivity architecture, an RRC connection reconfiguration process still needs to be performed to re-add the secondary access network device or change the secondary access network device, and this causes relatively large restore latency. Therefore, it is quite difficult for an existing dual connectivity architecture to satisfy a 5G mobile communications service, and specifically, a URLLC service that has a strict low latency requirement.
[0084] Based on the above problem, in a method of communication on a wireless network provided in the modalities of the present invention, a master access network device sends configuration information of signaling radio bearer (Signaling Radio Bearer, SRB) from a secondary access network device and a trigger condition to a terminal device in advance, and when the trigger condition is met, the terminal device uses the SRB configuration information from the secondary access network device to establish an RRC connection to the secondary access network device. This can
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27/59 accelerate RRC connection restoration and restoration of a dual connectivity working mode, and reduce data transmission interruption latency, thereby meeting a low latency requirement.
[0085] Figure 4 is a schematic diagram that illustrates, in an interaction mode, a method of communication on a wireless network according to one embodiment of the present invention. The following describes, in detail with reference to Figure 4, the method provided in this modality.
[0086] S401: A terminal device establishes double connections for a first access network device and a second access network device.
[0087] A connection, between the terminal device and the first access network device, included in the double connections is an RRC radio resource control connection.
[0088] It can be understood that, in double connections, the first access network device is a master access network device, and the second access network device is a secondary access network device. The terminal device establishes an RRC connection to the first access network device, and establishes a communication connection to the second access network device. The terminal device can establish a dual connectivity architecture with the first access network device and the second access network device through the processes shown in Figure 2 and Figure 3. Details are not described here again.
[0089] As described above, the communication connection is a non-RRC connection. The communication connection like the non-RRC connection can include the AC connection, a multi-beam or TRP connection, a multi-panel connection, and other modes of
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28/59 non-RRC connection that can be supported by a current mobile communications system and a 5G mobile communications system.
[0090] S402: The first access network device sends first configuration information to the terminal device.
[0091] Correspondingly, the terminal device receives the first configuration information sent by the first access network device.
[0092] The first configuration information includes SRB configuration information from the second access network device and a trigger condition to use the SRB configuration information by the terminal device.
[0093] Optionally, the SRB configuration information includes SRB0 configuration information for the second access network device. The SRB0 configuration information includes parameter information used by the second access network device to transmit an RRC message over a common control channel (Common Control Channel, CCCH).
[0094] SRB configuration information may alternatively include SRB0 configuration information and SRB1 configuration information from the second access network device. The SRB1 configuration information includes parameter information used by the second access network device to transmit an RRC message over a dedicated control channel (Dedicated Control Channel, DCCH).
[0095] Optionally, the SRB configuration information is secondary cell group carrier information (Secondary Cell Group, SCG). For SCG carrier configuration, downlink data can be directly sent by the secondary access network device to the device
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29/59 terminal, and uplink data can be sent by the terminal device to the secondary access network device and then sent by the secondary access network device directly to a higher level device.
[0096] The SRB configuration information can alternatively be a split carrier (split carrier). For the split carrier configuration, downlink data can be sent by the master access network device to the secondary access network device, and then sent by the secondary access network device to the terminal device; and uplink data is sent by the terminal to the secondary access network device, the secondary access network device sends the data to the master access network device, and the master access network device sends the data to a device higher level.
[0097] Optionally, the first configuration information still includes random access configuration information. The random access configuration information can include the random access preamble (preamble) allocated by the first access network device to the terminal device and an uplink feature required for random access. The first access network device can allocate the random access preamble to the terminal device based on a contention-based random access mode or a non-contention-based random access mode. The random access preamble and the random access feature can be dedicated to the terminal device, or can be shared by a plurality of terminal devices.
[0098] The first access network device can set a first timer for the random access feature. If the terminal device does not use the random access feature before
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30/59 of the first timer expires, the first access network device releases the random access feature. The first access network device can allocate the random access resource to another terminal device for use. This can improve resource utilization and prevent waste caused by idle resources.
[0099] Optionally, the first configuration information still includes measurement configuration information. The measurement configuration information includes at least one of a measurement object, a measurement time (measurement duration), a measurement limit, and measurement result reporting.
[00100] Optionally, the measurement configuration information can be configuration information used by the terminal device to perform cell measurement. The measurement object can include, for example, a cell-specific reference signal (Cell-Specific Reference Signals, CRS).
[00101] The measurement configuration information can alternatively be configuration information required by the terminal device to measure a radio connection with the first access network device and / or a radio connection with the second access network device. The measurement object may include, for example, a received reference signal power (RSRP Reference Signal Receiving Power), received reference signal quality (Reference Signal Receiving Quality, RSRQ), or an received signal strength (Received Signal Strength Indicator, RSSI).
[00102] The measurement configuration information may alternatively be configuration information required by the terminal device to perform beam (beam) measurement. In 5G mobile communications, each radio connection can include a plurality
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31/59 beams, and correspondingly, the quality of the radio connection can be measured using the beams. Therefore, a measurement granularity of the beam measurement is finer than that of a radio connection measurement. For beam measurement, the measurement object can include a number of measured beams and a measured beam type (a beam type from a data channel or a control channel). [00103] It can be understood that the terminal device can alternatively determine the quality of radio connection or cell quality in a predetermined mode instead of using the measurement configuration information.
[00104] The terminal device can use the SRB configuration information of the second access network device when the quality of the radio connection with the first access network device is relatively poor. The trigger condition can include at least one of the following conditions:
an RLF occurs between the terminal device and the first access network device;
the quality of the radio connection between the terminal device and the first access network device is lower than a first limit;
the quality of the radio connection between the terminal device and the second access network device is higher than a second limit;
the quality of the radio connection between the terminal device and the second access network device is higher than a third limit, and a value by which the quality of the radio connection between the terminal device and the second network device access is higher than the quality of the radio connection between the terminal device and the first access network device is greater than a fourth limit;
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32/59 the quality of the radio connection between the terminal device and the first access network device is lower than a fifth limit, and the quality of the radio connection between the terminal device and the second access network device access is higher than a sixth limit; and the quality of the radio connection between the terminal device and the first access network device is lower than a seventh limit, and the value by which the quality of the radio connection between the terminal device and the second access device access network is higher than the quality of the radio connection between the terminal device and the first access network device is greater than an eighth limit.
[00105] It should be noted that the first limit, the second limit, ..., and the eighth limit are only intended to distinguish between limits under different conditions. In an actual trigger condition, it is not limited that it needs to be the same amount of limits as the one in the descriptions above. The first access network device can adjust or change the above limits depending on a requirement. This is not specifically limited here.
[00106] Optionally, the first configuration information still includes configuration information of packet data convergence protocol (Packet Data Convergence Protocol, PDCP) (for example, a security key or a security algorithm), information radio connection control mode (Radio Connection Control, RLC) (for example, one in a transparent mode (Transparent Mode, TM), a confirmed mode (Confirmed Mode, AM), and an unconfirmed mode (No Mode Confirmed, UM)), and logical access configuration information from the media access control layer (Media Access Control, MAC) of the second access network device. The above information is in
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33/59 configuration configurations required for a communication channel between the terminal device and the second access network device.
[00107] Optionally, the first access network device adds the first configuration information to RRC connection reconfiguration information RRCConnectionReconfiguration, and sends the RRC connection reconfiguration information to the terminal device. For example, the first access network device can add the SRB configuration information from the second access network device to a RadioResourceConfigDedicated information element in the RRC connection reconfiguration message.
[00108] S403: When the trigger condition is met, the terminal device uses the SRB configuration information from the second access network device to establish an RRC connection to the second access network device.
[00109] Optionally, the terminal device determines the quality of the radio connection in the predetermined mode. For example, for the trigger condition (a) in step S402, the terminal device determines in predetermined mode, whether an RLF occurs on the radio connection between the terminal device and the first access network device.
[00110] The terminal device can continue listening on a physical downlink control channel (Physical Downlink Control Channel, PDCCH) after establishing the RRC connection to the first access network device. After a number of out-of-sync out-of-sync indicators received by the terminal device reaches a predetermined amount, terminal device one starts a T310 timer. If a number of in-sync sync indicators received by the terminal device reach
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34/59 a predetermined amount before the T310 timer expires, the quality of the radio connection between the terminal device and the first access network device is considered to be restored. Otherwise, if the number of indicators in sync synchronization received by the terminal device does not reach a predetermined amount before the T310 timer expires, an RLF is considered to occur between the terminal device and the first access network device.
[00111] The terminal device can also determine the quality of the radio connection using an amount of retransmission times of an RLC layer or a MAC layer. For example, when a maximum amount of retransmissions is reached at the RLC layer or the MAC layer, an RLF occurs between the terminal device and the first access network device.
[00112] Optionally, the terminal device performs a measurement and determines the quality of the radio connection based on a measurement result. For example, for trigger conditions (b) to (f) in step S402, the terminal device can measure the radio connection with the first access network device and / or the radio connection with the second network device access based on measurement configuration information.
[00113] If the terminal device supports beam measurement, the terminal device performs a beam measurement based on beam measurement configuration information. The quality of the radio connection can be represented by the quality of a predetermined quantity of better beams (better beam). The predetermined amount can be one or more. If the terminal device does not support beam measurement, the terminal device performs radio connection measurement or cell measurement based on the measurement configuration information. For example, the device to have
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35/59 minai measures an RSRP or RSRQ of the radio connection. For another example, the terminal device measures a cell's specific cell reference signal.
[00114] It can be understood that, the terminal device can alternatively determine the quality of radio connection in another possible mode, provided that if the trigger condition is met it can be determined. When the trigger condition is met, the terminal device uses the SRB configuration information from the second access network device to establish the RRC connection to the second access network device.
[00115] In addition to the above mode, the terminal device may alternatively use the SRB configuration information of the second access network device as instructed by the first access network device. For example, due to overload or the like, the first access network device may be unable to continue serving as a master base station to provide a service for the terminal device. In this case, the first access network device sends first instructional information to the terminal device. After receiving the first instructional information, the terminal device uses the SRB configuration information from the second access network device.
[00116] It can be understood that the terminal device can establish the RRC connection to the second access network device through the procedure shown in Figure 2. Directly using the SRB configuration information, pre-configured by the first network device access, the second access network device reduces signal consumption during RRC connection and a consequent latency. This can speed up the RRC connection reestablishment compared to the prior art.
[00117] Optionally, the terminal device uses the information
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36/59 random access configuration options included in the first configuration information to initiate a random access process for the second access network device. This simplifies tuning, omits a configuration process performed prior to random access, and effectively reduces RRC connection establishment latency.
[00118] It can be understood that the first access network device sends an RRC connection release message to the terminal device after the terminal device establishes the RRC connection to the second access network device, so that the terminal device maintains the RRC connection only for the second access network device. In this case, the second access network device temporarily serves as the master access network device in place of the first access network device, and performs a function that is previously performed by the first access network device.
[00119] Optionally, the second access network device determines whether to change a function. To be specific, after the RRC connection is established between the second access network device and the terminal device, the second access network device only temporarily serves as the master access network device in place of the first network device access. The second access network device needs to determine whether to formally switch to the master access network device. The second access network device can determine, based on a charge status of the second access network device, whether to change the function, or can determine, by measuring the signal quality of another nearby access network device, whether to change the function.
[00120] In a possible implementation, the second access network device determines to change the function. To be specific, the if
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37/59 the second access network device formally changes to the master access network device. To restore a dual connectivity architecture, the second access network device needs to add a new secondary access network device for offloading service.
[00121] Optionally, the second access network device exchanges information using an X2 interface between the access network devices, to obtain information about a third access network device. The information includes, for example, measurement configuration information from the third access network device and data radio bearer information (Data Radio Bearer, DRB). Then, the second access network device adds the third access network as the new secondary access network device, and sends the configuration information from the third access network device to the terminal device. The second access network device, the third access network device, and the terminal device can establish a new dual connectivity architecture through the procedure shown in Figure 3. The process mainly includes:
send, by the second access network device, an addition request to the third access network device;
receive, by the second access network device, a confirmation of an add request sent by the third access network device; and configuring, by the second access network device, the third access network device, and sending a complete configuration message to the third access network device. [00122] Then, the second access network device sends second configuration information to the terminal device, where the second configuration information includes information
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38/59 configuration settings for the third access network device. The second configuration information can be loaded into the RRC connection reconfiguration information, to be sent to the terminal device. The terminal device uses the configuration information from the third access network device to establish a communication connection to the third access network device in order to restore a normal dual connectivity working mode.
[00123] In the above process, the second access network device directly switches to the master access network device and adds the new secondary access network device (the third access network device), thereby speeding up the restoration dual connectivity architecture. During the restoration of dual connectivity architecture, the second access network device and the terminal device maintain the RRC connection. Therefore, neither control signal transmission nor data transmission is interrupted, so that a low latency requirement is effectively met.
[00124] In another possible implementation, instead of changing the function, the second access network device temporarily determines to serve as the master access network device in place of the first access network device, until a new network device master access is determined.
[00125] Optionally, the second access network device adds a new access network device, for example, a fourth access network device. The second access network device can determine the fourth access network device based on any or a combination of camping history information from the terminal device, service history information from another access network device, and the quali
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39/59 signal strength from a surrounding access network device. For example, the fourth access network device may be an access network device with the best signal quality measured by the second access network device. The above information can be reported by the terminal device to the second access network device, or can be obtained by the second access network device by interacting with the first access network device through an X2 interface. The second access network device then exchanges information with the fourth access network device via an X2 interface. The information exchanged includes context information, configuration information, measurement information, and the like from the terminal device. The information exchanged can be measured by the second access network device, or can be reported by the terminal device to the second access network device.
[00126] The second access network device sends a first message to the terminal device after determining the fourth access network device. The first message includes information identifying the fourth access network device. Then, the terminal device establishes an RRC connection to the fourth access network device using the procedure shown in Figure 2.
[00127] Optionally, the terminal device adds a new access network device, for example, a fifth access network device. The terminal device can determine the fifth access network device based on any or a combination of camping history information from the terminal device, service history information from another access network device, and signal quality. a surrounding access network device. The fifth access network device can
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40/59 be a surrounding access network device with the best signal quality measured by the terminal device. After determining the fifth access network device, the terminal device establishes an RRC connection to the fifth access network device using the procedure shown in Figure 2.
[00128] It should be noted that both the fourth access network device and the fifth access network device are new access network devices used to restore dual connectivity architecture, rather than specific access network devices. Therefore, the fourth and fifth are only intended to distinguish between determination modes (determining by the second access network device and determining by the terminal device).
[00129] In the above process, the second access network device and the terminal device maintain the RRC connection. Therefore, neither control signal transmission nor data transmission is interrupted, so that a low latency requirement is effectively met.
[00130] It can be understood that after the terminal device establishes the RRC connection for the fourth access network device or the fifth access network device, as the terminal device established the RRC connection for the second network device of access, the two RRC connections exist simultaneously. In the dual connectivity architecture, the terminal device maintains an RRC connection to only one access network device, and therefore one of the two RRC connections needs to be released.
[00131] Optionally the second access network device exchanges information sends an RRC connection release message to the terminal device, so that the terminal device maintains an RRC connection only for the fourth device
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41/59 access network device or the fifth access network device. [00132] Alternatively, the second access network device can be compared with the fourth access network device or the fifth access network device, in order to determine which access network device has a better radio connection quality . The access network device with the worst radio connection quality sends an RRC connection release message to the terminal device, and the access network device with the best radio connection quality is maintained as a new device master network connection and maintains the RRC connection to the terminal device. This mode can ensure RRC connection quality, thereby ensuring dual connection reliability.
[00133] It can be understood that the access network device that sends the RRC connection release message no longer maintains the RRC connection to the terminal device, and therefore can directly switch to act as a network device. secondary access on dual connections. This simplifies a process of adding a secondary access network device, and speeds up the restoration of a dual connect work mode.
[00134] Certainly, the access network device that sends the RRC connection release message can alternatively interrupt a communication connection to the terminal device. In this case, the terminal device can establish a communication connection to a new access network device, to restore a dual connectivity working mode.
[00135] It should be noted that the third access network device, the fourth access network device, and the fifth access network device in the above descriptions are only intended to distinguish between access network devices in different implementations
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42/59 tions. In a real communications system, it is not limited that there is a need to be as many access network devices as those in the descriptions above.
[00136] The above describes a possible process in which the terminal device uses, when the trigger condition is met, the first configuration information of the second access network device to establish the RRC connection for the second network device access, to rebuild double connections. In a possible case, the RRC connection between the terminal device and the first access network device is well maintained, so that the first configuration information does not have to be used in a long time. This means that the terminal device may need to maintain storage of the first configuration information, in order to use the first configuration information when necessary. In other words, the first configuration information needs to occupy a portion of the terminal device's storage space for a long time without being used. When the storage space of the terminal device is insufficient, this case may cause a decrease in the working efficiency of the terminal device.
[00137] Optionally, for the case above, the first configuration information has a specific validity period. When the first configuration information meets a first condition, the terminal device discards the first configuration information. The first condition can include at least one of the following conditions.
[00138] The terminal device does not use the first configuration information within a predetermined time.
[00139] For example, in step S402, the first access network device can set the first timer for the
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43/59 random access, and the timer can also act on the first configuration information. If the terminal device does not use the random access feature before the first timer expires, the terminal device is considered not to use the first configuration information, either. In this case, the terminal device discards the first configuration information.
[00140] (b) The first access network device sends second instructional information to the terminal device. The second instructional information instructs the terminal device to discard the first configuration information.
[00141] In the above mode, the terminal device can discard the first configuration information when the first configuration information has not been used in a long time, to free up storage space, thereby improving the working efficiency of the terminal device .
[00142] The terminal device receives a second message sent by the first access network device, where the second message includes the first updated configuration information.
[00143] In addition, the terminal device can also update the first configuration information. For example, the terminal device receives the second message sent by the first access network device. The second message includes the first updated configuration information.
[00144] Optionally, the second message is an RRC connection reconfiguration message. The RRC connection reset message still includes updated configuration information for the first access network device. The terminal device decodes the RRC connection reconfiguration message after receiving the RRC connection reconfiguration message. If the RRC connection reconfiguration information includes
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44/59 only refer to updated configuration information from the first access network device, the first original configuration information is still valid. If the RRC connection reconfiguration information includes not only the configuration information of the first access network device but also the first updated configuration information, the terminal device discards the first original configuration information and stores the first configuration information updated.
[00145] The first configuration information is updated so that the first access network device can adjust the configuration information of the second access network device in real time based on a network status, thereby implementing a configuration more flexible.
[00146] According to the method provided in this embodiment of the present invention, the first access network device sends the SRB configuration information of the second access network device and the trigger condition to the terminal device in advance. When the trigger condition is met, the terminal device uses the SRB configuration information from the second access network device to establish the RRC connection to the second access network device. This can speed up RRC connection restoration and shorten latency to restore dual connectivity working mode, thereby meeting a low latency requirement.
[00147] The above mainly describes the data processing method provided in the modalities of the present invention, from a perspective of interaction between network elements. It can be understood that, to implement the above functions, the network elements, for example, the terminal device and the network device, include hardware structures and / or corresponding software modules
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45/59 teeth to perform the functions. A person skilled in the art should be readily aware that, in the embodiments of the present invention, units and algorithm steps in the examples described with reference to the embodiments described in this specification can be implemented by hardware or a combination of computer hardware and software. Whether a function is performed by hardware or hardware driven by computer software depends on specific applications and design constraints of technical solutions. A person skilled in the art can use different methods to implement the functions described for each specific application, but the implementation should not be considered to be beyond the scope of the present invention.
[00148] Figure 5 is a possible schematic structural diagram of the terminal device in the above modalities. It should be noted that the terminal device can implement the method in the above modalities. Therefore, for specific details of the terminal device, refer to the descriptions in the above modalities. For brevity, the same content is not repeated below. The terminal device can be the terminal device 30 shown in Figure 1. The terminal device includes a processing unit 501 and a transceiver unit 502.
[00149] The processing unit 501 is configured to control the terminal device to establish double connections for a first access network device and a second access network device.
[00150] The double connections include an RRC connection between the terminal device and the first access network device. Signals for establishing RRC connections are exchanged using the 502 transceiver unit.
[00151] Transceiver unit 502 is configured to receive
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46/59 ber first configuration information sent by the first access network device.
[00152] The first configuration information includes SRB signaling radio bearer configuration information from the second access network device and a trigger condition to use the SRB configuration information.
[00153] Processing unit 501 is further configured to: when the trigger condition is met, control the terminal device to use the SRB configuration information of the second access network device to establish an RRC connection for the second access network device.
[00154] The trigger condition can include the conditions described in step S402 in Figure 4, and details are not described here again.
[00155] Optionally, the first configuration information includes random access configuration information, measurement configuration information, PDCP configuration information, RLC mode information, Layer logical channel configuration information MAC, and the like described in step S402 shown in Figure 4.
[00156] Also, as described in step S402 in Figure 4, the SRB configuration information can include SRB0 configuration information from the second access network device, or SRB0 configuration information and SRB1 configuration information from the second device access network. One type of SRB can be an SCG carrier or a split carrier.
[00157] Optionally, processing unit 501 is further configured to determine the quality of the radio connection in a predetermined mode. The processing unit 501 can also perform beam measurement, radio connection measurement, or
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47/59 cell measurement based on measurement setup information, so that processing unit 501 determines, based on a measurement result, whether the trigger condition is met.
[00158] Optionally, the transceiver unit 502 is further configured to receive first instruction information sent by the first access network device. The processing unit 501 controls, based on the first instructional information, the terminal device to use the SRB configuration information from the second access network device to establish the RRC connection to the second access network device.
[00159] The transceiver unit 502 may also be configured to receive second configuration information sent by the second access network device. The second configuration information includes configuration information for a third access network device. The processing unit 501 can be further configured to control the terminal device to use the configuration information from the third access network device to establish a communication connection, such as a non-RRC connection, to the third access network device. .
[00160] The transceiver unit 502 may be further configured to receive a first message sent by the second access network device. The first message includes identification information for a fourth access network device. The processing unit 501 can be further configured to control, based on the identification information of the fourth access network device, the terminal device to establish an RRC connection to the fourth access network device.
[00161] Transceiver unit 502 may still be configured to receive a connection release message from RRC sends
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48/59 by the second access network device or the fourth access network device.
[00162] Optionally, processing unit 501 is further configured to: determine a fifth access network device, and control the terminal device to establish an RRC connection to the fifth access network device.
[00163] The transceiver unit 502 may be further configured to receive an RRC connection release message sent by the second access network device or the fifth access network device.
[00164] When the first configuration information meets a first condition, the processing unit 501 may still be configured to discard the first configuration information. The first condition can be as described in step S403 in Figure 4, and details are not described here again.
[00165] The transceiver unit 502 can be further configured to receive second instruction information sent by the first access network device. The second instructional information instructs the terminal device to discard the first configuration information.
[00166] The transceiver unit 502 may also be configured to receive a second message sent by the first access network device. The second message includes first updated configuration information.
[00167] Other implementable functions, from the units above, that are not described are the same as relative functions in the wireless network communication method shown in Figure 4, and details are not described here again. Through collaboration and cooperation between units, the terminal device can obtain the SRB configuration information from the second access network device and the
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49/59 trigger condition in advance. When the trigger condition is met, the terminal device uses the SRB configuration information from the second access network device to establish the RRC connection to the second access network device. This can speed up RRC connection restoration, and shorten the latency of restoring a dual connectivity working mode. In addition, transmission is not interrupted in a dual connection restoration process. Therefore, a low latency requirement is met.
[00168] Figure 6 is a possible schematic structural diagram of the terminal device in the above modalities. The terminal device includes a processor 601 and a transceiver 602. The processing unit 501 described in Figure 5 can be implemented by processor 601, the transceiver unit 502 described in Figure 5 can be implemented by transceiver 602, and transceiver 602 can be configured to support the terminal device in sending data to and receiving data from the network device in the above modalities. The terminal device may further include memory 603, which may be configured to store a program code and data from the terminal device. The components of the terminal device are coupled together, and are configured to support functions of the terminal device in the wireless network communication method described in Figure 4.
[00169] It can be understood that Figure 6 merely shows a simplified design of the terminal device. In a real application, the terminal device can include any number of transceivers, processors, memories, and the like, and all terminal devices that can implement the modalities of the present invention fall within the scope of protection of the present invention.
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50/59 [00170] Figure 7 is a possible schematic structural diagram of the access network device in the above modalities. It should be noted that the access network device can implement the method in the above modalities. Therefore, for specific details of the access network device, refer to the descriptions in the above modalities. For brevity, the same content is not repeated below. The access network device can be the access network device 10 shown in Figure 1. The access network device is a first access network device, that is, a dual access master network device. The access network device includes a processing unit 701 and a transceiver unit 702.
[00171] Processing unit 701 is configured to control the access network device to establish an RRC connection to a terminal device using transceiver unit 702.
[00172] The RRC connection is one of the double connections, and the double connections still include a communication connection between the terminal device and a second access network device. [00173] Transceiver unit 702 is configured to send first configuration information to the terminal device. [00174] The first configuration information includes SRB signaling radio bearer configuration information from the second access network device and a trigger condition to use the SRB configuration information. The SRB configuration information of the second access network device is used by the terminal device to establish an RRC connection to the second access network device when the trigger condition is met.
[00175] The trigger condition can include the conditions described
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51/59 in step S402 in Figure 4, and details are not described here again.
[00176] Optionally, the first configuration information includes the random access configuration information, the measurement configuration information, the PDCP configuration information, the RLC mode information, the Layer logical channel configuration information MAC, and the like described in step S402 shown in Figure 4.
[00177] Also, as described in step S402 in Figure 4, SRB configuration information can include SRBO configuration information from the second access network device, or SRBO configuration information and SRB1 configuration information from the second device access network. One type of SRB can be an SCG carrier or a split carrier.
[00178] Transceiver unit 702 may also be configured to send first instructional information to the terminal device. The first instructional information instructs the terminal device to use the SRB configuration information from the second access network device to establish the RRC connection to the second access network device.
[00179] The processing unit 701 can still be configured to set a predetermined time for the first configuration information. If the terminal device does not use the first configuration information within the predetermined time, the terminal device discards the first configuration information.
[00180] Transceiver unit 702 may be further configured to send second instructional information to the terminal device. The second instructional information instructs the terminal device to discard the first configuration information.
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52/59 [00181] Transceiver unit 702 may be further configured to send a second message to the terminal device. The second message includes first updated configuration information.
[00182] Other implementable functions, from the units above, that are not described are the same as the relative functions in the wireless communication method shown in Figure 4, and details are not described here again. Through collaboration and cooperation between units, the first access network device can send the SRB configuration information from the second access network device and the trigger condition to the terminal device in advance. In this mode, when the trigger condition is met, the terminal device can use the SRB configuration information from the second access network device to quickly restore the RRC connection, thereby shortening the latency of restoring a working mode. dual connectivity. In addition, transmission is not interrupted in a dual connection restoration process. Therefore, a low latency requirement is met.
[00183] Figure 8 is a possible structural schematic diagram of the access network device in the above modalities. The access network device includes a processor 801 and an 802 transceiver. The processing unit 701 described in Figure 7 can be implemented by processor 801, the transceiver unit 702 described in Figure 7 can be implemented by transceiver 802, and the transceiver 802 may be configured to support the access network device in sending data to and receiving data from the terminal device in the above modalities. The access network device may also include memory 803, which may be configured to store program code and data from the access device.
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53/59 terminal. The components of the access network device are coupled together, and are configured to support the functions of the first access network device in the wireless network communication method in the modality described in Figure 4.
[00184] It can be understood that Figure 8 merely shows a simplified design of the access network device. In an actual application, the access network device can include any number of transceivers, processors, memories, and the like, and all access network devices that can implement the modalities of the present invention fall within the scope of protection of the present invention. .
[00185] Figure 9 is a possible schematic structural diagram of the access network device in the above modalities. It should be noted that the access network device can implement the method in the above modalities. Therefore, for specific details of the access network device, refer to the descriptions in the above modalities. For brevity, the same content is not repeated below. The access network device can be the access network device 20 shown in Figure 1. The access network device is a second access network device, that is, a secondary access network device in double connections. The access network device includes a processing unit 901 and a transceiver unit 902.
[00186] Processing unit 901 is configured to control the access network device to establish a communication connection to a terminal device using transceiver unit 902.
[00187] The communication connection is one of the double connections. The double connections also include an RRC connection between the terminal device and a first access network device.
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54/59 [00188] The processing unit 901 is further configured to: when the trigger condition is met, control the second access network device to establish an RRC connection to the terminal device.
[00189] The RRC connection is established using SRB configuration information from the second access network device. The SRB configuration information of the second access network device and the trigger condition is sent by the first access network device to the terminal device using first configuration information.
[00190] The trigger condition can include the conditions described in step S402 in Figure 4, and details are not described here again.
[00191] Optionally, the first configuration information includes random access configuration information, measurement configuration information, PDCP configuration information, RLC mode information, Layer logical channel configuration information MAC, and the like described in step S402 shown in Figure 4.
[00192] Also, as described in step S402 in Figure 4, the SRB configuration information can include SRB0 configuration information from the second access network device, or SRB0 configuration information and SRB1 configuration information from the second device access network. One type of SRB can be an SCG carrier or a split carrier.
[00193] Optionally, the transceiver unit 902 is further configured to: send an add request to a third access network device, and receive an add request confirmation sent by the third access network device.
[00194] Processing unit 901 may still be configured
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55/59 to: configure the third access network device, and control the transceiver unit 902 to send a complete configuration message to the third access network device. [00195] Transceiver unit 902 may also be configured to send second configuration information to the terminal device. The second configuration information includes configuration information for the third access network device. The second configuration information is used by the terminal device to establish a communication connection to the third access network device.
[00196] The processing unit 901 may be further configured to determine a fourth access network device.
[00197] The transceiver unit 902 may be further configured to send a first message to the terminal device. The first message includes information identifying the fourth access network device. The identification information of the fourth access network device is used by the terminal device to establish an RRC connection to the fourth access network device.
[00198] Transceiver unit 902 may be further configured to send an RRC connection release message to the terminal device.
[00199] Other implementable functions, from the units above, that are not described are the same as the relative functions in the wireless network communication method shown in Figure 4, and details are not described here again. Through collaboration and cooperation between units, when the trigger condition is met, the terminal device can use the SRB configuration information from the second access network device to quickly restore the RRC connection, and the second network device access
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56/59 switches to a master access network device and temporarily or permanently serves as the master access network device. This avoids transmission interruption in a dual connection restoration process, and shortens the latency of restoring a dual connectivity working mode, thereby meeting a low latency requirement.
[00200] Figure 10 is a possible schematic structural diagram of the access network device in the above modalities. The access network device includes a processor 1001 and a transceiver 1002. The processing unit 901 described in Figure 9 can be implemented by processor 1001, the transceiver unit 902 described in Figure 9 can be implemented by transceiver 1002, and the transceiver 1002 may be configured to support the access network device in sending data to and receiving data from the terminal device in the above modalities. The access network device may further include memory 1003, which may be configured to store a program code and data from the terminal device. The components of the access network device are coupled together, and are configured to support the functions of the second access network device in the wireless network communication method in the modality described in Figure 4.
[00201] It can be understood that Figure 10 merely shows a simplified design of the access network device. In an actual application, the access network device can include any number of transceivers, processors, memories, and the like, and all access network devices that can implement the modalities of the present invention fall within the scope of protection of the present invention. .
[00202] It can be understood that the processor in the embodiments of the present invention can be a processing unit
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57/59 central (CPU), a general purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a network of programmable ports in the field (FPGA) or other programmable logic device, a transistor logic device, a hardware component, or any combination thereof. The processor may implement or execute several logic blocks, modules, and exemplary circuits described with reference to the content described in the present invention. Alternatively, the processor may be a combination of processors that implement a computing function, for example, a combination that includes one or more microprocessors, or a combination of a DSP and a microprocessor.
[00203] The steps of the methods or algorithms described in the modalities of the present invention can be directly incorporated into hardware, a software module executed by a processing unit, or a combination thereof. The software module can be stored in a RAM memory, an instant memory, a ROM memory, an EPROM memory, an EEPROM memory, a registry, a hard disk, a removable magnetic disk, a CDROM, or a storage medium for any another way in the technique. For example, the storage medium can be connected to a processing unit, so that the processing unit can read information from the storage medium, and store and write information on the storage medium. Optionally, the storage medium can alternatively be integrated into a processing unit. The processing unit and the storage medium can be arranged in an ASIC, and the ASIC can be arranged in a user terminal device. Optionally, the processing unit and the storage medium can alternatively be arranged in different components of a user terminal device.
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58/59 [00204] A person skilled in the art should be aware that in the one or more examples above, the functions described above in the modalities of the present invention can be implemented by hardware, software, firmware, or any combination thereof. If implemented in software, the functions can be stored in a computer-readable medium, or transmitted to a computer-readable medium in the form of one or more instructions or code. The computer-readable medium includes a computer storage medium, and a communications medium that facilitates transferring a computer program from one location to another location. The storage medium can be any available medium that can be accessed by a general or special computer. For example, such a computer-readable medium may include but is not limited to RAM, ROM, EEPROM, CD-ROM or other compact disk storage, magnetic disk storage, or other magnetic storage device, or any another means that can be used to load or store a program code in the form of an instruction or a data structure, and a program code in other forms that can be read by a general / special computer or a general processing unit / Special. In addition, any connection can be appropriately defined as a computer-readable medium. For example, if software is transmitted from a website, server, or other memory resource using a coaxial cable, a fiber optic computer, a twisted pair, or a digital subscriber line (DSL), or in a wire such as infrared, radio, or microwave, the software is also included in a defined computer-readable medium. The disc (disc) and disc (disc) include a compressed magnetic disc, a laser disc, a compact disc, a DVD, a floppy disc, and a Blu-ray disc. The disk usually copies data magnetically, and the disk usually
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59/59 copies data optically using laser. The above combination may also be included in the computer-readable medium.
[00205] The objectives, technical solutions and beneficial effects of the modalities of the present invention are further described in detail in the specific implementations above. It should be understood that the above descriptions are merely specific implementations of the modalities of the present invention, but are not intended to limit the scope of protection of the modalities of the present invention.

权利要求:
Claims (49)
[1]
1. Communication method in a wireless network, characterized by the fact that it comprises:
establish, by a terminal device, double connections for a first access network device and a second access network device, in which a connection, between the terminal device and the first access network device, comprised in the double connections it is an RRC radio resource control connection;
receive, by the terminal device, first configuration information sent by the first access network device, where the first configuration information comprises configuration information of SRB signaling radio bearer from the second access network device and a trigger condition to use the SRB configuration information, and when the trigger condition is met, use, by the terminal device, the SRB configuration information of the second access network device to establish an RRC connection to the second network device access.
[2]
2. Method according to claim 1, characterized by the fact that the trigger condition comprises at least one of the following conditions:
an RLF radio connection failure occurs between the terminal device and the first access network device;
the quality of a radio connection between the terminal device and the first access network device is lower than a first limit;
the quality of a radio connection between the terminal device and the second access network device is higher than a second limit;
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2/23 the quality of the radio connection between the terminal device and the second access network device is higher than a third limit, and a value by which the quality of the radio connection between the terminal device and the second network access device is higher than the quality of the radio connection between the terminal device and the first network access device is greater than a fourth limit;
the quality of the radio connection between the terminal device and the first access network device is lower than a fifth limit, and the quality of the radio connection between the terminal device and the second access network device is more higher than a sixth limit; and the quality of the radio connection between the terminal device and the first access network device is lower than a seventh limit, and the value by which the quality of the radio connection between the terminal device and the second access device access network is higher than the quality of the radio connection between the terminal device and the first access network device is greater than an eighth limit.
[3]
3. Method according to claim 1 or 2, characterized by the fact that the SRB configuration information comprises SRBO configuration information, or the SRB information comprises SRBO configuration information and SRB1 configuration information, and a SRB type is a secondary SCG cell group carrier or a split carrier.
[4]
Method according to any one of claims 1 to 3, characterized by the fact that the first configuration information still comprises random access configuration information, and the random access configuration information is used by the terminal device to initiate, for the second
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3/23 access network device, a random access process for establishing RRC connection.
[5]
5. Method according to any of the claims
1 to 4, characterized by the fact that the first configuration information still comprises measurement configuration information, and the measurement configuration information is used by the terminal device to determine, based on a result obtained by performing measurement using the measurement information. measurement setting, if the trigger condition is met.
[6]
6. Method according to any of the claims
1 to 4, characterized by the fact that before the terminal device uses SRB configuration information from the second access network device to establish an RRC connection to the second access network device, the method still comprises :
receive, by the terminal device, the first instruction information sent by the first access network device, where the first instruction information instructs the terminal device to use the SRB configuration information of the second access network device to establish the RRC connection to the second access network device.
[7]
7. Method according to any of the claims
1 to 6, characterized by the fact that the method still comprises: receiving, by the terminal device, second configuration information sent by the second access network device, in which the second configuration information comprises configuration information from a third access device access network; and use, by the terminal device, the configuration information of the third access network device to establish
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4/23 a communication connection to the third access network device.
[8]
8. Method according to any one of claims 1 to 6, characterized by the fact that the method still comprises:
receiving, by the terminal device, a first message sent by the second access network device, wherein the first message comprises identification information of a fourth access network device;
establishing, by the terminal device, an RRC connection to the fourth access network device based on the identification information of the fourth access network device; and receiving, by the terminal device, an RRC connection release message sent by the second access network device or an RRC connection release message sent by the fourth access network device.
[9]
9. Method according to any one of claims 1 to 6, characterized by the fact that the method still comprises:
determining, by the terminal device, a fifth access network device;
establish, through the terminal device, an RRC connection to the fifth access network device; and receiving, by the terminal device, an RRC connection release message sent by the second access network device or an RRC connection release message sent by the fifth access network device.
[10]
10. Method according to any one of claims 1 to 9, characterized by the fact that the method still comprises:
when the first configuration information meets a first condition, discard, by the terminal device, the first
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5/23 first configuration information.
[11]
11. Method according to claim 10, characterized in that the first condition comprises at least one of the following conditions:
the terminal device does not use the first configuration information within a predetermined time;
the terminal device receives second instruction information sent by the first access network device, wherein the second instruction information instructs the terminal device to discard the first configuration information; and the terminal device receives a second message sent by the first access network device, wherein the second message comprises first updated configuration information.
[12]
12. Communication method in a wireless network, characterized by the fact that it comprises:
establish, by a first access network device, an RRC radio resource control connection to a terminal device, where the RRC connection is one of double connections, and the double connections still comprise a communication connection between the terminal device and a second access network device; and sending, by the first access network device, first configuration information to the terminal device, where the first configuration information comprises configuration information of SRB signaling radio bearer of the second access network device and a condition of trigger to use the SRB configuration information, and the SRB configuration information of the second access network device is used by the terminal device to establish a connection
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6/23 RRC for the second access network device when the trigger condition is met.
[13]
13. Communication method according to claim 12, characterized by the fact that the trigger condition comprises at least one of the following conditions:
an RLF radio connection failure occurs between the terminal device and the first access network device;
the quality of a radio connection between the terminal device and the first access network device is lower than a first limit;
the quality of a radio connection between the terminal device and the second access network device is higher than a second limit;
the quality of the radio connection between the terminal device and the second access network device is higher than a third limit, and a value by which the quality of the radio connection between the terminal device and the second network device access is higher than the quality of the radio connection between the terminal device and the first access network device is greater than a fourth limit;
the quality of the radio connection between the terminal device and the first access network device is lower than a fifth limit, and the quality of the radio connection between the terminal device and the second access network device is more higher than a sixth limit; and the quality of the radio connection between the terminal device and the first access network device is lower than a seventh limit, and the value by which the quality of the radio connection between the terminal device and the second access device access network is higher than the quality of the radio connection between the
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7/23 terminal device and the first access network device is greater than an eighth limit.
[14]
14. Communication method according to claim 12 or 13, characterized in that the SRB configuration information comprises SRBO configuration information, or the SRB configuration information comprises SRBO configuration information and configuration information SRB1, and a type of SRB is a secondary SCG cell group carrier or a divided carrier.
[15]
15. Method according to any of claims 12 to 14, characterized in that the first configuration information still comprises random access configuration information, and the random access configuration information is used by the terminal device to initiate, for the second access network device, a random access process for establishing RRC connection.
[16]
16. Method according to any one of claims 12 to 15, characterized in that the first configuration information still comprises measurement configuration information, and the measurement configuration information is used by the terminal device to determine, based on in a result obtained by performing measurement using the measurement setup information, if the trigger condition is met.
[17]
17. Method according to any one of claims 12 to 15, characterized in that the method further comprises:
send, by the first access network device, first instruction information to the terminal device, where the first instruction information instructs the terminal device to use the SRB configuration information of the second device
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8/23 positive access network to establish the RRC connection to the second access network device.
[18]
18. Method according to any of claims 12 to 17, characterized by the fact that the method still comprises:
set, by the first access network device, a predetermined time for the first configuration information, where the predetermined time is used by the terminal device to discard the first configuration information when the first configuration information is not used within the time predetermined; or send, by the first access network device, second instructional information to the terminal device, where the second instructional information instructs the terminal device to discard the first configuration information; or send, via the first access network device, the second message to the terminal device, where the second message comprises first updated configuration information.
[19]
19. Communication method over a wireless network, characterized by the fact that it comprises:
establish, by a second access network device, a communication connection to a terminal device, where the communication connection is one of double connections, and the double connections still comprise an RRC radio resource control connection between the terminal device and a first access network device; and establish, by the second access network device, an RRC connection to the terminal device when the trigger condition is met, in which the RRC connection is established
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9/23 using SRB configuration information from the second access network device, and SRB configuration information from the second access network device and the trigger condition are sent by the first access network device to the terminal device using first configuration information.
[20]
20. Method according to claim 19, characterized in that the trigger condition comprises at least one of the following conditions:
an RLF radio connection failure occurs between the terminal device and the first access network device;
the quality of a radio connection between the terminal device and the first access network device is lower than a first limit;
the quality of a radio connection between the terminal device and the second access network device is higher than a second limit;
the quality of the radio connection between the terminal device and the second access network device is higher than a third limit, and a value by which the quality of the radio connection between the terminal device and the second network device access is higher than the quality of the radio connection between the terminal device and the first access network device is greater than a fourth limit;
the quality of the radio connection between the terminal device and the first access network device is lower than a fifth limit, and the quality of the radio connection between the terminal device and the second access network device is more higher than a sixth limit; and the quality of the radio connection between the terminal device and the first access network device is lower than
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10/23 a seventh limit, and the value by which the quality of the radio connection between the terminal device and the second access network device is higher than the quality of the radio connection between the terminal device and the first network access device is greater than an eighth limit.
[21]
21. Communication method according to claim 19 or 20, characterized in that the SRB configuration information comprises SRBO configuration information, or the SRB configuration information comprises SRBO configuration information and configuration information SRB1, and a type of SRB is a secondary SCG cell group carrier or a divided carrier.
[22]
22. Method according to any one of claims 19 to 21, characterized in that the method still comprises:
send, by the second access network device, an addition request to a third access network device;
receive, by the second access network device, a confirmation of an add request sent by the third access network device;
configure, by the second access network device, the third access network device, and send a complete configuration message to the third access network device; and sending, via the second access network device, second configuration information to the terminal device, where the second configuration information comprises configuration information from the third access network device, and the second configuration information is used by the device terminal to establish a communication connection to the third access network device.
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11/23
[23]
23. Method according to any of claims 19 to 21, characterized in that the method still comprises:
determining, by the second access network device, a fourth access network device; and sending, by the second access network device, a first message to the terminal device, wherein the first message comprises identification information of the fourth access network device, and the identification information of the fourth access network device is used by the terminal device to establish an RRC connection to the fourth access network device.
[24]
24. Method according to claim 23, characterized by the fact that the method still comprises:
send, by the second access network device, an RRC connection release message to the terminal device.
[25]
25. Terminal device, characterized by the fact that it comprises:
a processing unit, configured to control the terminal device to establish dual connections to a first access network device and a second access network device, in which a connection between the terminal device and the first network device access, comprised of double connections, is an RRC radio resource control connection; and a transceiver unit, configured to receive first configuration information sent by the first access network device, where the first configuration information comprises SRB signaling radio bearer configuration information from the second access network device and a
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12/23 trigger condition to use the SRB configuration information, where when the trigger condition is met, the processing unit is still configured to control the terminal device to use the SRB configuration information of the second access network to establish an RRC connection to the second access network device.
[26]
26. Terminal device according to claim 25, characterized in that the trigger condition comprises at least one of the following conditions:
an RLF radio connection failure occurs between the terminal device and the first access network device;
the quality of a radio connection between the terminal device and the first access network device is lower than a first limit;
the quality of a radio connection between the terminal device and the second access network device is higher than a second limit;
the quality of the radio connection between the terminal device and the second access network device is higher than a third limit, and a value by which the quality of the radio connection between the terminal device and the second network device access is higher than the quality of the radio connection between the terminal device and the first access network device is greater than a fourth limit;
the quality of the radio connection between the terminal device and the first access network device is lower than a fifth limit, and the quality of the radio connection between the terminal device and the second access network device is more higher than a sixth limit;
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13/23 the quality of the radio connection between the terminal device and the first access network device is lower than a seventh limit, and the value by which the quality of the radio connection between the terminal device and the second network access device is higher than the quality of the radio connection between the terminal device and the first network access device is greater than an eighth limit; and the quality of the radio connection between the terminal device and the first access network device is lower than a seventh limit, and the value by which the quality of the radio connection between the terminal device and the second access device access network is higher than the quality of the radio connection between the terminal device and the first access network device is greater than an eighth limit.
[27]
27. Terminal device according to claim 25 or 26, characterized in that the SRB configuration information comprises SRBO configuration information, or the SRB configuration information comprises SRBO configuration information and configuration information SRB1, and a type of SRB is a secondary SCG cell group carrier or a divided carrier.
[28]
28. Terminal device according to any of claims 25 to 27, characterized in that the first configuration information still comprises random access configuration information, and random access configuration information is used by the processing unit to controlling the terminal device to initiate, for the second access network device, a random access process for establishing RRC connection.
[29]
29. Terminal device according to any one
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14/23 of claims 25 to 28, characterized by the fact that the first configuration information still comprises measurement configuration information, and the measurement configuration information is used by the processing unit to determine, based on a result obtained by executing measurement using measurement setup information, if the trigger condition is met.
[30]
Terminal device according to any one of claims 25 to 28, characterized in that before the processing unit controls the terminal device to use the SRB configuration information of the second access network device to establish the connection RRC for the second access network device, the following is further understood by:
the transceiver unit is further configured to receive first instruction information sent by the first access network device, where the first instruction information instructs the terminal device to use the SRB configuration information of the second access network device to establish the RRC connection to the second access network device.
[31]
31. Terminal device according to any one of claims 25 to 30, characterized in that the transceiver unit is further configured to receive second configuration information sent by the second access network device, in which the second configuration information comprise configuration information for a third access network device; and the processing unit is further configured to control the terminal device to use the control information
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15/23 figuring the third access network device to establish a communication connection to the third access network device.
[32]
32. Terminal device according to any one of claims 25 to 30, characterized in that the transceiver unit is further configured to receive the first message sent by the second access network device, wherein the first message comprises information from identification of a fourth access network device;
the processing unit is further configured to control, based on the identification information of the fourth access network device, the terminal device for establishing an RRC connection to the fourth access network device; and the transceiver unit is further configured to receive an RRC connection release message sent by the second access network device or an RRC connection release message sent by the fourth access network device.
[33]
33. Terminal device according to any one of claims 25 to 30, characterized in that the processing unit is further configured to determine a fifth access network device;
the processing unit is further configured to control the terminal device to establish an RRC connection to the fifth access network device; and the transceiver unit is further configured to receive an RRC connection release message sent by the second access network device or an RRC connection release message sent by the fifth access network device.
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16/23
[34]
34. Terminal device according to any one of claims 25 to 33, characterized in that when the first configuration information meets a first condition, the processing unit is further configured to discard the first configuration information.
[35]
35. Terminal device according to claim 34, characterized in that the first condition comprises at least one of the following conditions:
the processing unit does not control, within a predetermined time, the terminal device to use the first configuration information;
the transceiver unit receives second instruction information sent by the first access network device, wherein the second instruction information instructs the processing unit to discard the first configuration information; and the transceiver unit receives a second message sent by the first access network device, wherein the second message comprises first updated configuration information.
[36]
36. Access network device, characterized by the fact that it comprises:
a processing unit, configured to control the access network device to establish an RRC radio resource control connection to a terminal device using a transceiver unit, where the RRC connection is one of double connections, and the double connections further comprise a communication connection between the terminal device and a second access network device; and the transceiver unit, still configured to send
Petition 870190080721, of 8/20/2019, p. 99/114
17/23 first configuration information for the terminal device, where the first configuration information comprises SRB signaling radio bearer configuration information of the second access network device and a trigger condition to use the configuration information of SRB, and SRB configuration information from the second access network device is used by the terminal device to establish an RRC connection to the second access network device when the trigger condition is met.
[37]
37. Access network device according to claim 36, characterized in that the trigger condition comprises at least one of the following conditions:
an RLF radio connection failure occurs between the terminal device and the first access network device;
the quality of a radio connection between the terminal device and the first access network device is lower than a first limit;
the quality of a radio connection between the terminal device and the second access network device is higher than a second limit;
the quality of the radio connection between the terminal device and the second access network device is higher than a third limit, and a value by which the quality of the radio connection between the terminal device and the second network device access is higher than the quality of the radio connection between the terminal device and the first access network device is greater than a fourth limit;
the quality of the radio connection between the terminal device and the first access network device is lower than a fifth limit, and the quality of the radio connection between the device
Petition 870190080721, of 8/20/2019, p. 100/114
18/23 terminal and the second access network device is higher than a sixth limit; and the quality of the radio connection between the terminal device and the first access network device is lower than a seventh limit, and the value by which the quality of the radio connection between the terminal device and the second access device access network is higher than the quality of the radio connection between the terminal device and the first access network device is greater than an eighth limit.
[38]
38. Access network device according to claim 36 or 37, characterized in that the SRB configuration information comprises SRBO configuration information, or the SRB configuration information comprises SRBO configuration information and information of configuration of SRB1, and a type of SRB is a secondary SCG cell group carrier or a split carrier.
[39]
39. Access network device according to any of claims 36 to 38, characterized in that the first configuration information still comprises random access configuration information, and random access configuration information is used by the access device terminal to initiate, for the second access network device, a random access process for establishing RRC connection.
[40]
40. Access network device according to any one of claims 36 to 39, characterized in that the first configuration information still comprises measurement configuration information, and the measurement configuration information is used by the terminal device to determine, based on a result obtained by performing measurement using the
Petition 870190080721, of 8/20/2019, p. 101/114
19/23 measurement configuration information, if the trigger condition is met.
[41]
41. Access network device according to any one of claims 36 to 39, characterized in that the transceiver unit is further configured to send first instructional information to the terminal device, where the first instructional information instructs the terminal device to use the SRB configuration information from the second access network device to establish the RRC connection to the second access network device.
[42]
42. Access network device according to any one of claims 36 to 41, characterized in that the processing unit is still configured to set a predetermined time for the first configuration information, in which the predetermined time is used by the terminal device for discarding the first configuration information when the first configuration information is not used within the predetermined time; or the transceiver unit is further configured to send second instructional information to the terminal device, wherein the second instructional information instructs the terminal device to discard the first configuration information; or the transceiver unit is further configured to send a second message to the terminal device, where the second message comprises first updated configuration information.
[43]
43. Access network device, characterized by the fact that it comprises a processing unit, configured to control
Petition 870190080721, of 8/20/2019, p. 102/114
20/23 the access network device for establishing a communication connection to a terminal device using a transceiver unit, where the communication connection is one of double connections, and the double connections still comprise a resource control connection RRC radio link between the terminal device and a first access network device, in which when a trigger condition is met, the processing unit is further configured to control the access network device to establish an RRC connection to the terminal device, where the RRC connection is established using SRB configuration information from the access network device, and SRB configuration information from the access network device and the trigger condition are sent by the first network device access to the terminal device using first configuration information.
[44]
44. Access network device according to claim 43, characterized in that the trigger condition comprises at least one of the following conditions:
an RLF radio connection failure occurs between the terminal device and the first access network device;
the quality of a radio connection between the terminal device and the first access network device is lower than a first limit;
the quality of a radio connection between the terminal device and the second access network device is higher than a second limit;
the quality of the radio connection between the terminal device and the second access network device is higher than a third limit, and a value by which the quality of the radio connection between the terminal device and the second network device in
Petition 870190080721, of 8/20/2019, p. 103/114
21/23 access is higher than the quality of the radio connection between the terminal device and the first access network device is greater than a fourth limit;
the quality of the radio connection between the terminal device and the first access network device is lower than a fifth limit, and the quality of the radio connection between the terminal device and the second access network device is more higher than a sixth limit; and the quality of the radio connection between the terminal device and the first access network device is lower than a seventh limit, and the value by which the quality of the radio connection between the terminal device and the second access device access network is higher than the quality of the radio connection between the terminal device and the first access network device is greater than an eighth limit.
[45]
45. Access network device according to claim 43 or 44, characterized in that the SRB configuration information comprises SRBO configuration information, or the SRB configuration information comprises SRBO configuration information and information of configuration of SRB1, and a type of SRB is a secondary SCG cell group carrier or a split carrier.
[46]
46. Access network device according to any one of claims 43 to 45, characterized in that the transceiver unit is further configured to send an addition request to a third access network device;
the transceiver unit is further configured to receive an add request confirmation sent by the third access network device;
Petition 870190080721, of 8/20/2019, p. 104/114
22/23 the processing unit is further configured to: configure the third access network device, and control the transceiver unit to send a complete configuration message to the third access network device; and the transceiver unit is further configured to send second configuration information to the terminal device, where the second configuration information comprises configuration information from the third access network device, and the second configuration information is used by the access device. terminal to establish a communication connection to the third access network device.
[47]
47. Access network device according to any one of claims 43 to 45, characterized in that the processing unit is further configured to determine a fourth access network device; and the transceiver unit is further configured to send a first message to the terminal device, wherein the first message comprises identification information for the fourth access network device, and identification information for the fourth access network device is used. by the terminal device to establish an RRC connection to the fourth access network device.
[48]
48. Access network device according to claim 47, characterized in that the transceiver unit is further configured to send an RRC connection release message to the terminal device.
[49]
49. Computer-readable storage medium, characterized by the fact that a computer program is stored in the computer-readable storage medium, and when the
Petition 870190080721, of 8/20/2019, p. 105/114
23/23 program is executed by a processor, steps of the method as defined in any of claims 1 to 24, are implemented.

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法律状态:
2021-10-19| B350| Update of information on the portal [chapter 15.35 patent gazette]|

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