method and device for user mobility

专利摘要:
The present invention relates to a method performed by user equipment (UE) comprising: receiving, from a base station, a first radio resource control message (rrc) including a transfer command; determining whether a first condition included in the first rrc message is met; and if the first condition is met, send a transfer indication to the base station, the transfer indication being used to inform the base station that the eu is about to begin performing a transfer. The present application further provides the eu and a corresponding base station. By means of the technical solution of the present application, the interruption time of data transmission in the nr transfer process can be further reduced, and unnecessary incorrect transfer is avoided.
公开号:BR112019012572A2
申请号:R112019012572
申请日:2017-12-19
公开日:2019-11-26
发明作者:Chang Ningjuan；Yamada Shohei
申请人:Fg innovation co ltd；Sharp Kk；
IPC主号:

专利说明:

Descriptive Report of the Invention Patent for METHOD AND DEVICE FOR USER MOBILITY.
FIELD OF TECHNIQUE [001] The present invention relates to the field of wireless communications technology. More particularly, the present application relates to a method for communication between devices, user equipment and a base station.
BACKGROUND OF THE INVENTION [002] A new research project on 5G technical standards (see non-patent literature: RP 160671: New SID Proposal: Study on New Radio Access Technology) was proposed by NTT DOCOMO in the plenary session of the Partnership Project for the third generation (3GPP) RAN # 71 March 2016 and has been approved. The objective of the research project is to develop a New Radio Access Technology (NR) to meet all 5G application scenarios, requirements and implementation environments. NR has mainly three application scenarios: Enhanced Mobile Broadband Communication (eMBB), Massive Machine Type Communication (mMTC) and Ultra Reliable and Low Latency Communication (URLLC). According to the planning of the research project, NR standardization is carried out in two stages: the first stage of standardization will be completed by mid-2018; the second stage of standardization will be completed by the end of 2019. The standard specifications of the first stage need to be compatible with later versions with the standard specifications of the second stage, while the standard specifications of the second stage need to be established based on the standard specifications of the first stage. internship and meet all requirements of NR 5G technical standards.
[003] In the current new LTE system, user mobility in a connected state is implemented mainly through a
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2/68 transfer process. The procedure is briefly described as follows:
[004] Phase 1: The base station provides a measurement configuration for user equipment (User Equipment, UE); the UE performs the measurement based on the measurement configuration; and when the configured reporting condition is met, the UE sends a measurement report to the base station. The base station determines, based on the measurement report received and other factors such as the load of the base station, whether it is necessary to transfer the UE.
[005] Phase 2: If a transfer is to be performed, a source base station initiates a transfer preparation process to send a transfer request message to a target base station; the target base station determines, according to factors such as a UE context in the transfer request message and the target base station's resources, when to accept the UE, and returns a transfer acknowledgment message to the source base station if the UE can be accepted, and the transfer acknowledgment message includes a transfer command.
[006] Phase 3: The source base station provides the transfer command to the UE, and begins sending data to the source base station. The UE that receives the transfer command immediately executes the transfer command and accesses the target base station.
[007] Phase 3: After confirming successful access by the UE, the target base station sends a complete transfer message to the source base station.
[008] It can be seen, from the above, that the transfer procedure in the LTE system can cause an interruption of data transmission. In the subsequent version of the LTE system, the optimization of the transfer procedure, such as a transfer without a random access process, aims to reduce a
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3/68 latency and transfer overloads.
[009] In the NR technology requirement of G5, it is necessary to satisfy the data interruption latency of 0 ms, as much as possible, in a mobile transfer process, in order to satisfy the requirement of seamless transfer mobility in the NR . In a current data transfer process, one cause of a transfer failure that results in a long data transmission interruption is that the transfer command is not given in time. A possible approach to solve this problem is a conditional transfer. In conditional transfer, a relatively conservative threshold measurement report is fixed, so that a base station acquires a measurement result in advance and performs a transfer preparation process according to the measurement result and a selected target base station . In this way, the base station can provide a transfer command to the UE before an actual transfer condition is satisfied, with the transfer command carrying the transfer execution condition. Unlike the existing transfer mechanism of the Long Term Evolution (LTE) system, after receiving a transfer command, the UE does not perform a transfer immediately, but performs the detection according to a transfer condition loaded on a transfer command message. When the transfer condition is met, the UE starts executing the transfer command and accesses a target cell.
SUMMARY OF THE INVENTION [0010] In a next generation communication system, how to improve a user's mobile performance to achieve a 0 ms interruption time has become an urgent problem to be solved.
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4/68 [0011] In accordance with one aspect of the present application, a method performed by user equipment (UE) is presented, which comprises: receiving, from a base station, a first radio resource control message (RRC) which comprises a transfer command; determine whether a first condition included in the first RRC message is satisfied; and if the first condition is met, send a transfer indication to the base station, the transfer indication being used to inform the base station that the UE is about to start executing a transfer.
[0012] In one mode, the method also comprises receiving, from the base station, a response to the transfer indication before executing the transfer.
[0013] In one embodiment, the response comprises an element of Media Access Control (MAC) control.
[0014] In one mode, the transmission of the transfer indication is configured by the base station through an RRC message.
[0015] In one embodiment, sending a transfer indication to the base station comprises sending the transfer indication to the base station through a MAC layer.
[0016] In one mode, the method also comprises starting to carry out the transfer after the transfer indication is sent to the base station through the MAC layer.
[0017] In one modality, sending the transfer indication to the base station through a MAC layer comprises: determining if there is an uplink resource for new transmission in a current transmission time interval (TTI); and if there is an uplink feature for new transmission, the transfer indication indicates that the transfer is triggered and is not a possibility
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5/68, and the uplink feature is capable of accommodating the transfer indication and a corresponding MAC sub-header, generating and sending the transfer indication, the transfer indication comprising a MAC control element.
[0018] In one modality, sending the transfer indication to the base station through a MAC layer comprises: determining if there is an uplink resource for new transmission in a TTI; and if there is an uplink resource for new transmission, and the transfer indication indicates that the transfer is triggered and is not canceled, generate and send the transfer indication, the transfer indication being a MAC control element, or if not there is an uplink feature for new transmission, trigger a scheduling request.
[0019] In one mode, in one or more of the following cases, if the transfer of the transfer indication is triggered, the transfer of the transfer indication is canceled:
- an indication of a top layer of the MAC layer to cancel the transmission of the transfer indication is received;
- MAC is reset; and
- the transfer indication is included in a MAC PDU to be sent.
[0020] In one embodiment, the transfer indication comprises a dedicated logical channel identity (Logical Channel Identity, LCID).
[0021] In accordance with another aspect of the present application, user equipment (UE) is presented, which comprises: a receiving unit, configured to receive, from a base station, a first resource control message radio (RRC) comprising a transfer command; one unit
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6/68 of determination, configured to determine whether a first condition included in the first RRC message is satisfied; and a sending unit configured to send, if the first condition is met, a transfer indication to the base station, the transfer indication being used to inform the base station that the UE is about to start executing a transfer.
[0022] In one mode, the receiving unit is further configured to receive, from the base station, a response to the transfer indication before executing the transfer.
[0023] In one embodiment, the response comprises an element of Media Access Control (MAC) control.
[0024] In one mode, the transmission of the transfer indication is configured by the base station through an RRC message.
[0025] In one mode, the sending unit is configured to: send the transfer indication to the base station through a MAC layer.
[0026] In one mode, the transfer is initiated after the transfer indication is sent to the base station through the MAC layer.
[0027] In one mode, the sending unit is configured to: determine if there is an uplink resource for new transmission in a current transmission time interval (TTI); and if there is an uplink resource for new transmission, the transfer indication indicates that a transfer is triggered and is not canceled and the uplink resource is able to accommodate the transfer indication and a corresponding MAC sub-header, generate and send the transfer indication, the transfer indication comprising a MAC control element.
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7/68 [0028] In one mode, the sending unit is configured to: determine if there is an uplink feature for new transmission in a current TTI transmission time interval; and if there is an uplink resource for new transmission and the transfer indication indicates that the transfer is triggered and is not canceled, generate and send the transfer indication, the transfer indication being a MAC control element, or if there is no uplink resource for new transmission, trigger a scheduling request.
[0029] In one mode, in one or more of the following cases, if the transfer of the transfer indication is triggered, the transfer of the transfer indication is canceled:
- an indication of a top layer of the MAC layer to cancel the transmission of the transfer indication is received;
- MAC is reset; and
- the transfer indication is comprised in a MAC PDU to be sent.
[0030] In one embodiment, the transfer indication comprises a dedicated logical channel identity (Logical Channel Identity, LCID).
[0031] In accordance with another aspect of this application, a method performed by a base station is presented, which comprises: sending a first radio resource control message (Radio Resource Control, RRC) comprising a transfer command to user equipment (UE); and receive a transfer indication from the UE.
[0032] In one embodiment, the method further comprises sending a reply message to the UE after receiving the transfer indication from the UE.
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8/68 [0033] In one embodiment, the method further comprises ceasing data transmission and communication with the UE.
[0034] In one embodiment, the method further comprises carrying out data to a target cell.
[0035] In one mode, the transmission of the transfer indication is configured by means of an RRC message.
[0036] In accordance with another aspect of this application, a base station is provided, which comprises: a sending unit, configured to send a first radio resource control (RRC) message comprising a transfer command for user equipment (UE); and a receiving unit, configured to receive a transfer indication from the UE.
[0037] In one embodiment, the sending unit is further configured to send a reply message to the UE after the receiving unit receives the transfer indication from the UE.
[0038] In one embodiment, the base station also comprises a transfer management unit, configured to cease data transmission and communication with the UE.
[0039] In one embodiment, the base station also comprises a transfer management unit configured to carry out data forwarding to a target cell.
[0040] In one mode, the transmission of the transfer indication is configured by means of an RRC message.
[0041] By means of the technical solution of the present application, the interruption time of data transmission in the transfer process in the NR can be further reduced, and the UE can reasonably manage the transfer configuration information to avoid an unnecessary incorrect transfer , as well as the resulting signal overloads and a service interruption.
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9/68 [0042] This application is not limited to the NR system, and is also applicable to other LTE systems such as Version 15 and later LTE systems. In addition, this application is also not limited to the conditional transfer method, and is also applicable to other transfer methods.
BRIEF DESCRIPTION OF THE DRAWINGS [0043] The above and other characteristics of this application will become more evident with the following detailed description together with the attached drawings, in which:
[0044] Figure 1 is a flow chart of a method performed by a UE according to an embodiment of the present application;
[0045] Figure 2 is a block diagram of a user equipment according to an embodiment of the present application;
[0046] Figure 3 is a schematic diagram that illustrates an exemplary format of an EC MAC;
[0047] Figure 4 is a schematic diagram illustrating an exemplary format of a MAC subheader; and [0048] Figure 5 is a block diagram of a base station according to an embodiment of the present application.
[0049] Many aspects of this application can be better understood with reference to the following drawings. The components in the figures are not drawn to scale and are only intended to illustrate the principles of this application. For ease of illustration and description of some parts of the present application, the corresponding parts in the attached drawings can be scaled up or down.
[0050] The elements and resources described in an attached drawing or modality of this application can be combined with elements and resources illustrated in one or more other modalities or drawings. In addition, in the attached drawings, reference numbers
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Similar ratios denote corresponding components and can be used to indicate corresponding components used in more than one modality.
DETAILED DESCRIPTION OF THE MODALITIES [0051] With reference to the description and the attached drawings, the specific modalities of this application will be described in detail, and the ways in which the principle of this application is employed will be illustrated. It should be understood that the modalities of this application are not limited in scope. Within the spirit and scope defined by the appended claims, the modalities of this application may include several variations, modifications and equivalents.
[0052] The features described and / or illustrated in relation to a specific modality can be used in one or more other modalities in the same or similar way, or can be combined with the resources in other modalities, or can be used to replace resources in other modalities.
[0053] It should be noted in particular that the terms understand and / or include used here refer to the existence of resources, complete parts, steps or components, but do not exclude the existence or addition of one or more among other resources, complete parts , steps or components.
[0054] With reference to the attached drawings and specific modalities, a transfer method according to the present application is described in detail below.
[0055] The present application uses an Evolved Universal Terrestrial Radio Access Network (E-UTRAN), NR and a corresponding core network, and a next generation core network as an example. It should be noted that the present application is not limited to the UTRAN network, the NR and the
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11/68 corresponding core and next generation core network, and can also be used for other evolved wireless communication systems, such as a 6G wireless communication system, and is applicable to other deployment scenarios, such as connectivity scenarios dual / multiple connectivity. It should be noted that the definition and naming of the base station, cell, source base station, source cell, the target base station and the target cell may be different in different deployment scenarios or in different wireless communication systems. The present application can also be applied to those scenarios or systems that use different naming schemes, for example, an evolved B node (eNB) can be replaced by an NR node (gNB). Similarly, the NR and / or later versions of the LTE-based E-UTRAN communication system, the radio protocol layer also includes all or some functions provided by a Radio Resource Control layer , RRC), a Packet Data Convergence Protocol (PDCP) layer, a Radio Link Control (RLC) layer, and a Media Access Control layer (Medium Access Control, MAC), and may also include other functions that are not provided by the PDCP layer, RLC layer and MAC layer, such as the beam management function. The protocol layers described in the present application, including the RRC, PDCP, RLC and MAC layers, are applicable to all equivalent radio protocol layer concepts in E-UTRAN, NR and other systems.
[0056] In the present application, a source cell can also be called a source base station, or it can be a source beam (beam) and a source transmission point (TRP), and a target cell can also be referred to as a target base station, or it can be a target beam and a target transmission point. A source cell refers to
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12/68 to a base station that serves the UE before a transfer process is carried out or a cell that serves the UE or that the UE encapsulates before reselecting the cell. A target cell refers to a base station that serves the UE after the transfer procedure has been performed, that is, a cell indicated in a transfer command, or a cell that serves the UE or that the UE encapsulates after the transfer. cell re-selection.
[0057] In the present application, before receiving an RRC message that includes a transfer command, the UE maintains communication, including data transmission, with a source base station before executing a transfer, in order to further reduce the duration of a data transmission interruption.
[0058] Figure 1 is a flow chart of a method performed by a UE according to an embodiment of the present application. As shown in Figure 1, the method includes the steps described below: [0059] Step S110: start executing the method.
[0060] Step S120: receive, from a base station, a first RRC radio resource control message that includes a transfer command.
[0061] Step S130: determine if a first condition in the first RRC message is satisfied.
[0062] Step S140: if the first condition is met, send a transfer indication to the base station, the transfer indication being used to inform the base station that the UE is about to start executing a transfer. Preferably, a response to the transfer indication can be received from the base station before carrying out the transfer. For example, the response may include a MAC control element.
[0063] For example, the transmission of the transfer indication can be configured by the base station via a message
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13/68 RRC. Preferably, the transfer indication may include a dedicated LCID logical channel identity.
[0064] For example, the transfer indication is sent to the base station through the MAC Media Access Control layer. Preferably, the transfer is initiated after the transfer indication is sent to the base station via the MAC layer.
[0065] In one modality, sending a transfer indication to the base station through a MAC Media Access Control layer comprises: determining if there is an uplink resource for new transmission in a time interval of current TTI transmission; and if there is an uplink resource for new transmission, the transfer indication indicates that a transfer is triggered and is not canceled, and the uplink resource is able to accommodate the transfer indication and a corresponding MAC sub-header, generate and send the transfer indication, the transfer indication comprising a MAC control element.
[0066] In one modality, sending a transfer indication to the base station through the MAC Media Access Control layer comprises: determining if there is an uplink resource for new transmission in a transmission time interval current TTI; and if there is an uplink resource for new transmission, and the transfer indication indicates that a transfer is triggered and is not canceled, generate and send the transfer indication, the transfer indication being a MAC control element, or if not there is an uplink resource for new transmission, trigger a scheduling request.
[0067] In one mode, in one or more of the following cases, if the transmission of the transfer indication is triggered, the
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14/68 transmission of the transfer indication is canceled:
- an indication of a top layer of the MAC layer to cancel the transmission of the transfer indication is received;
- MAC is reset; and
- the transfer indication is included in a MAC PDU to be sent.
[0068] Step S150: the method ends here.
[0069] Figure 2 is a block diagram of a user equipment (UE) according to an embodiment of the present application. As shown in Figure 2, the UE 200 includes a receiving unit 210, a determination unit 220 and a sending unit 230. Those skilled in the art should understand that the UE 200 may also include other functional units necessary to implement its functions, such as various processors, memories, radio frequency signal processing units, baseband signal processing units and other units. However, for the sake of simplicity, a detailed description of these well-known elements is omitted here.
[0070] Receiving unit 210 is configured to receive, from a base station, a first RRC radio resource control message including a transfer command.
[0071] The unit of determination 220 is configured to determine whether a first condition included in the first RRC message is satisfied.
[0072] The sending unit 230 is configured to send, if the first condition is met, a transfer indication to the base station, the transfer indication being used to inform the base station that the UE is about to start performing a transfer.
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15/68 [0073] Alternatively, the receiving unit 210 can be configured to receive, from the base station, a response to the transfer indication before executing the transfer. For example, the response may include a MAC control element.
[0074] In one mode, the transmission of the transfer indication is configured by the base station through an RRC message. Preferably, the transfer indication may include a dedicated LCID logical channel identity.
[0075] Alternatively, the sending unit 230 can be configured to send the transfer indication to the base station through the MAC Media Access Control layer. Preferably, the UE starts executing the transfer after the transfer indication is sent.
[0076] In one embodiment, the sending unit 230 is configured to: determine if there is an uplink resource for new transmission in a current TTI transmission time interval; and if there is an uplink resource for new transmission, the transfer indication indicates that a transfer is triggered and is not canceled, and the uplink resource is able to accommodate the transfer indication and a corresponding MAC sub-header, generate and send the transfer indication, the transfer indication comprising a MAC control element.
[0077] In one embodiment, the sending unit 230 is configured to: determine if there is an uplink resource for new transmission in a current TTI transmission time interval; and if there is an uplink resource for new transmission, and the transfer indication indicates that a transfer is triggered and is not canceled, generate and send the transfer indication, the transfer indication being a MAC control element, or
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16/68 if there is no uplink resource for new transmission, trigger a scheduling request.
[0078] In one mode, in one or more of the following cases, if the transfer of the transfer indication is triggered, the transfer of the transfer indication is canceled:
- an indication of a top layer of the MAC layer to cancel the transmission of the transfer indication is received;
- MAC is reset; and
- the transfer indication is included in a MAC PDU to be sent.
[0079] Figure 5 is a block diagram of a base station according to an embodiment of the present application. As shown in Figure 5, the base station 500 includes a sending unit 510 and a receiving unit 530 and optionally includes a transfer management unit 520. Those skilled in the art should understand that the base station 500 can also include other functional units needed to implement its functions, such as multiple processors, memories, radio frequency signal processing units, baseband signal processing units and other units. However, for the sake of simplicity, a detailed description of these well-known elements is omitted here.
[0080] The sending unit 510 is configured to send a first RRC radio resource control message that includes a transfer command to the user equipment (UE).
[0081] The receiving unit 530 is configured to receive a transfer indication from the UE.
[0082] In one embodiment, the sending unit 510 is further configured to send a reply message to the UE after the unit
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17/68 of receiving 530 receive a transfer indication from the UE.
[0083] In one embodiment, the transfer management unit 520 is configured to cease data transmission and communication with the UE.
[0084] In one embodiment, the transfer management unit 520 is configured to carry out data forwarding to a target cell.
[0085] Preferably, the transmission of the transfer indication is configured by means of an RRC message.
Mode 1: Timer-based transfer configuration information management method [0086] In this mode, the UE manages transfer configuration information received based on a timer. In summary, if the timer is running, the UE determines that a transfer configuration received or stored is valid; if the timer is not running, for example, if the timer ends or stops, the UE determines that a received or stored transfer configuration is invalid, or the UE releases / clears / discards the received or stored transfer configuration information.
[0087] This timer can be referred to as a validity timer. Specifically, the method of implementation in this modality is described.
[0088] In one embodiment, when receiving a first RRC message from a source base station that includes a transmit command, the UE or the RRC layer of the UE can perform the following operations:
1. start or restart a validity timer; and
2. store the received transfer configuration.
[0089] The timer is used for configuration management
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18/68 transfer. Optionally, the transfer configuration includes all or part of the configuration in the RRC message that includes the transfer command; or, optionally, the transfer configuration includes the configuration in the transfer command. In other embodiments, the transfer configuration can also be expressed as a transfer command.
[0090] Optionally, the transfer command includes a combination of one or more of the target cell's mobility control information (such as a cell identifier, a cell frequency, and random access information), system information, as well such as a radio resource configuration, a measurement configuration, safety information, and a secondary UE cell configuration in a target cell.
[0091] Optionally, the operations above are not in any specific order.
[0092] Optionally, the UE or the UE RRC performs operation 1 only when the first RRC message that includes the transfer command is received and this message includes the timer configuration.
[0093] Optionally, the transfer is a conditional transfer, that is, the transfer command includes information about a first condition, and when the first condition is met, the UE starts to execute a transfer procedure.
[0094] For example, the first condition may be a measurement event, for example, the first condition may be that the signal quality of a neighboring cell is greater than that of a serving cell by a threshold over a period of time, and the neighboring cell corresponds to the target cell for transfer.
[0095] In another modality, when the UE starts executing a transfer procedure, or when the UE receives a second
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19/68 RRC message and the UE has the stored transfer configuration received from the first RRC message, the UE or the UE RRC interrupts the validity timer, or the UE or UE RRC determines that the validity timer has expired.
[0096] When the validity timer stops or expires, the UE releases the stored transfer configuration received from the first RRC message. Here, release can also be expressed as disposal, cleaning and the like. Optionally, the RRC layer of the UE (indicating for the lower layer) cancels the transmission of the transfer indication (see modalities 15 to 17 below).
[0097] The second RRC message is used to release an RRC connection, or is used to indicate that the UE enters an inactive state, or is used to indicate that the UE suspends the RRC connection (suspended RRC). In addition, the second RRC message can be an RRC connection reconfiguration message or an RRC connection release message. It should be noted that the inactive state in the present invention refers to a state between a connected RRC state and an inactive RRC state, and the name of this state has not been determined in the NR. This state can sometimes be referred to as a new state. This new state can be an independent RRC state, or it can be a substate of the connected RRC state or inactive RRC state. This state in LTE or E-UTRAN can also be called a state connected to the light (connected light). Other forms of commands and definitions of that state are within the scope of this application for the purposes of this application.
[0098] In an implementation, the validity timer is configured by the base station via an RRC message, as the first RRC message that includes the transfer command, with the validity timer configuration including a
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20/68 timer value. Optionally, the validity timer can be configured by a source cell or a target cell. Optionally, in a scenario in which a plurality of transfer commands or a plurality of transfer target cells is supported, the validity timer and / or its configuration can be configured to be distinguishable for each transfer command or for each cell- target, or the validity timer is configured to be distinguishable for a transfer command or for a target cell, and its value is a common value shared within all transfer commands or target cells.
[0099] Optionally, if the validity timer is configured to be distinguishable for a target cell or for a transfer command, the solution mentioned in this modality can also be performed individually for a target cell or a transfer command.
[00100] The above method in this modality is also applicable to non-transfer scenarios, such as EU-based mobility, and is still applicable, for example, to cell re-selection. The following modalities are described in combination with EU-based mobility.
[00101] In one mode, the UE receives a reselection configuration sent by the base station, in which the cell re-selection parameter is received through dedicated signaling, such as an RRC connection release message, a reconfiguration message RRC connection, and the like. The UE performs cell reselection, according to the received reselection configuration. Cell re-selection takes place in an RRC idle state or an inactive RRC state. The UE manages the cell reselection configuration received based on the validity timer. The validity timer can be configured by means of radio broadcasting signaling or by
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21/68 dedicated signage. In addition, the validity timer can be included in the cell reselection configuration to be configured for the UE together with the cell reselection configuration via dedicated signaling. The reselection configuration includes configuration information for cell reselection such as preferred cell information, reselection frequency priority, reselection cell priority, and the like. The UE that manages the cell reselection configuration received based on the validity timer includes: if the timer is running, the UE determines that the stored reselection configuration is valid; and if the timer is not running, for example, if the timer expires or stops, the UE determines that the stored cell reselection setting is invalid, and / or the UE deletes the stored reselection setting. The cell reselection setting is used for EU-based mobility, and is still used for cell reselection, and the name of the cell reselection setting can also be other names such as mobility control information. idle state or idle state mobility control information.
[00102] In one mode, when receiving a message from a base station with the cell re-selection configuration, the UE or the RRC layer of the UE can perform the following operations:
1. start or restart a validity timer; and
2. store the received cell reselection configuration.
[00103] The timer is used for configuration management of cell re-selection.
[00104] Optionally, the operations above are not in any specific order.
[00105] Optionally, the UE or the RRC of the UE performs operation 1 only when the cell reselection configuration is received and
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22/68 this message includes the timer configuration.
[00106] In one mode, when the UE enters a connected RRC state, or when the UE enters an idle RRC state, or a local area update occurs, the UE or the RRC of the UE interrupts the validity timer, or the UE or the RRC of the UE determines that the expiration timer expires.
[00107] When the expiration timer stops or expires, the UE releases the stored cell re-selection setting. Here, release can also be expressed as disposal, cleaning and the like.
[00108] In another mode, the UE releases the stored cell reselection configuration without depending on the validity timer, that is, when the UE enters a connected RRC state, or when the UE enters a state of connected RRC idle, or when a location area update occurs.
Mode 2: condition-based transfer configuration information management method [00109] In this mode, the UE manages the transfer configuration received according to some conditions. When the condition is not met, the UE or the RRC of the UE determines that the received or stored transfer configuration is valid. When the condition is met, the UE or the UE RRC determines that the received transfer configuration is invalid, or the UE or the UE RRC releases the received or stored transfer configuration. Here, release can also be expressed as disposal, cleaning and the like.
[00110] Specifically, the method of implementation in this modality is described.
[00111] Step 1: when a first RRC message is received that includes a transfer command from a base station
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23/68 source, the behavior performed by the UE or the RRC layer of the UE includes storing the transfer configuration.
[00112] Optionally, the transfer configuration includes all or part of the configuration in the RRC message that includes the transfer command; or, optionally, the transfer configuration includes the configuration in the transfer command.
[00113] Optionally, the transfer is a conditional transfer, that is, the transfer command includes information about a first condition, and when the first condition is met, the UE starts to execute a transfer procedure.
[00114] For example, the first condition can be a measurement event, for example, the first condition can be that the signal quality of a neighboring cell is higher than that of a serving cell by a threshold over a period of time. The neighboring cell corresponds to the target cell for transfer.
[00115] Optionally, the transfer command includes a combination of one or more of the target cell's mobility control information (such as a cell identifier, a cell frequency, and random access information), system information, as well such as a radio resource configuration, a measurement configuration, safety information, and a secondary UE cell configuration in a target cell.
[00116] Step 2: when the second condition is met, the UE or the RRC of the UE performs the following operations:
- determine that the stored transfer configuration is invalid, and / or
- release the stored transfer configuration.
[00117] The second condition is configured by the base station via an RRC message, and the RRC message can be a system message or a dedicated RRC message,
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24/68 as the RRC connection reconfiguration, and it can also be a first RRC message that includes a transfer command. Optionally, the second condition can be configured by a source cell or a target cell.
[00118] Based on the measurement events defined in the LTE, the second condition can be any combination of one or more of the following events, but is not limited to the following events:
event 1: a signal quality measurement value from a server cell is better than a threshold;
event 2: a signal quality measurement value from a neighboring cell is worse than a threshold;
event 3: a signal quality measurement value from a server cell is better than a signal quality measurement value from a neighboring cell by a threshold;
event 4: a signal quality measurement value from a server cell is better than a threshold, and a signal quality measurement value from a neighboring cell is worse than another threshold;
[00119] The neighboring cell in the above event refers to the corresponding target cell in the transfer command. Optionally, the server cell and the target cell in the event above can be from different Radio Access Technologies (RATs). Optionally, the configuration of the second condition or event can be based on the configuration of an LTE measurement event. For example, when the second condition is set to event 3, where the threshold is set to th and the Time to Trigger, TTT value is set to duration, the UE detects the signal quality of a source cell and target cell; if the difference between a service cell signal quality measurement value and a neighbor cell signal quality measurement value is greater than or equal to th, and is continuous for a time, the UE of
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25/68 ends that the second condition is satisfied.
[00120] This modality is also applicable to a scenario in which a plurality of transfer commands or a plurality of transfer target cells is supported. In this scenario, the operations above in this modality are performed individually for a transmission command or a transfer target cell. Specifically, the configuration of the second condition can be configured by each transfer target cell, or it can be shared by all transfer target cells; in the UE operation mentioned above in this modality, when the second condition corresponding to a certain transfer target cell is satisfied, the UE performs operations corresponding only to the transmission configuration corresponding to the corresponding transfer target cell.
Mode 3: Transfer configuration management method based on base station control [00121] In this mode, the UE manages the transfer configuration received or stored according to an indication from the base station. That is, when the UE receives a transfer command, the UE determines that the corresponding transfer configuration is valid; when the UE receives an invalid indication from the base station, the UE determines that the corresponding received or stored transfer configuration is invalid, or the UE releases the received or stored transfer configuration.
[00122] The implementation of this modality is described in detail below.
[00123] Step 1: when a first RRC message is received that includes a transfer command from a source base station, the behavior performed by the UE or the UE's RRC layer includes storing the transfer configuration.
[00124] Optionally, the transfer configuration includes all
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26/68 or a part of the configuration in the RRC message that includes the transfer command; or, optionally, the transfer configuration includes the configuration in the transfer command.
[00125] Optionally, the transfer is a conditional transfer, that is, the transfer command includes information about a first condition, and when the first condition is met, the UE starts to execute a transfer procedure.
[00126] For example, the first condition may be a measurement event, for example, the first condition may be that the signal quality of a neighboring cell is higher than that of a serving cell by a threshold over a period of time. The neighboring cell corresponds to the target cell for transfer.
[00127] Optionally, the transfer command includes a combination of one or more of a target cell's mobility control information (such as a cell identifier, a cell frequency, and random access information), system information, as well such as a radio resource configuration, a measurement configuration, safety information, and a secondary UE cell configuration in a target cell.
[00128] Step 2: indication information is received from the base station. Referral information is used to instruct the UE to cancel the corresponding transfer. They can be included in the RRC message or can be signaled by the MAC.
[00129] Step 3: if the message received includes the indication information described in step 2, the UE:
- determines that the corresponding stored transfer configuration is invalid, and / or
- release the corresponding stored transfer configuration.
[00130] Optionally, before Step 2, the method still includes the
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UE reporting a measurement result (measurement report) to the base station.
[00131] This modality is also applicable to a scenario that has a plurality of transfer commands or a plurality of transfer target cells. In this scenario, the above operation is performed individually for a target cell. Specifically, the indication of information sent by the base station can optionally comprise a target cell identifier or an identifier that can be associated with a certain transfer command or a specific target cell. In this case, the operation in step 3 is performed only for the transfer command associated with the indication information or for the transfer configuration corresponding to the target cell. Furthermore, in this scenario, optionally, if the indication information sent by the base station does not include a target cell identifier or does not include an identifier that can be associated with a certain transfer command or a specific target cell, the UE performs the operation in step 3 for all transfer commands or transfer settings corresponding to all target cells.
Mode 4 [00132] Step 1: when a first RRC message is received that includes a transfer command from a source base station, the behavior performed by the UE or the RRC layer of the UE includes storing the transfer configuration.
[00133] Optionally, the transfer configuration includes all or part of the configuration in the RRC message that includes the transfer command; or, optionally, the transfer configuration includes the configuration in the transfer command.
[00134] Optionally, the transfer is a conditional transfer, that is, the transfer command includes information about
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28/68 a first condition, and when the first condition is met, the UE begins to perform a transfer procedure.
[00135] Optionally, the transfer command includes a combination of one or more of the mobility control information of a target cell (such as a cell identifier, a cell frequency, and random access information), system information, as well such as a radio resource configuration, a measurement configuration, safety information, and a secondary UE cell configuration in a target cell.
[00136] Step 2: when a Radio Link Failure (RLF) is detected, the UE or UE's RRC layer performs the following operations:
- determine that the stored transfer configuration is invalid, and / or
- release the stored transfer configuration.
[00137] This modality is also applicable to a scenario that has a plurality of transfer commands or a plurality of transfer target cells.
Mode 5 [00138] Step 1: when a first RRC message is received that includes a transfer command from a source base station, the behavior performed by the UE or the UE's RRC layer includes storing the transfer configuration.
[00139] Optionally, the transfer configuration includes all or part of the configuration in the RRC message that includes the transfer command; or, optionally, the transfer configuration includes the configuration in the transfer command.
[00140] Optionally, the transfer is a conditional transfer, that is, the transfer command includes information about a first condition, and when the first condition is met, the UE
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29/68 starts executing a transfer procedure.
[00141] For example, the first condition may be a measurement event, for example, the first condition may be that the signal quality of a neighboring cell is higher than that of a serving cell by a threshold over a period of time. The neighboring cell corresponds to the target cell for transfer.
[00142] Optionally, the transfer command includes a combination of one or more of a target cell's mobility control information (such as a cell identifier, a cell frequency, and random access information), system information, as well such as a radio resource configuration, a measurement configuration, safety information, and a secondary UE cell configuration in a target cell.
[00143] Step 2: when the UE initiates a transfer procedure or receives a second RRC message, and the UE has the transmission configuration stored in it, the UE or the EU RRC layer performs the following operations:
- determine that the stored transfer configuration is invalid, and / or
- release the stored transfer configuration.
[00144] The second RRC message is used to release an RRC connection, or is used to indicate that the UE enters an inactive state, or is used to indicate that the UE suspends the RRC connection (suspended RRC). In addition, the second RRC message can be an RRC connection reconfiguration message or an RRC connection release message. It should be noted that the inactive state in the present invention refers to a state between a connected RRC state and an inactive RRC state, and the name of this state has not been determined in the NR. This state can sometimes be referred to as a new state. This new state can be an independent RRC state,
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30/68 or it can be a substate of the connected RRC state or inactive RRC state. Other forms of commands and definitions of that state are within the scope of this application for the purposes of this application.
[00145] This modality is also applicable to a scenario in which a plurality of transfer commands or a plurality of transfer target cells is supported. In this scenario, the operations above in this modality are performed individually for a transmission command or a transfer target cell. Specifically, the configuration of the second condition can be configured by each transfer target cell, or it can be shared by all transfer target cells; in the UE operation mentioned above in this modality, when the second condition corresponding to a certain transfer target cell is satisfied, the UE performs operations corresponding only to the transmission configuration corresponding to the corresponding transfer target cell. Mode 6 [00146] Step 1: when a first RRC message is received that includes a transfer command from a source base station, the behavior performed by the UE or the RRC layer of the UE includes storing the transfer configuration.
[00147] Optionally, the transfer configuration includes all or part of the configuration in the RRC message that includes the transfer command; or, optionally, the transfer configuration includes the configuration in the transfer command.
[00148] Optionally, the transfer is a conditional transfer, that is, the transfer command includes information about a first condition, and when the first condition is met, the UE begins to execute a transfer procedure.
[00149] For example, the first condition can be an event of
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31/68 measurement, for example, the first condition may be that the signal quality of a neighboring cell is higher than that of a serving cell by a threshold over a period of time. The neighboring cell corresponds to the target cell for transfer.
[00150] Optionally, the transfer command includes a combination of one or more of the mobility control information of a target cell (such as a cell identifier, a cell frequency, and random access information), system information, as well such as a radio resource configuration, a measurement configuration, safety information, and a secondary UE cell configuration in a target cell.
[00151] Step 2: when the UE receives another first RRC message that includes a transfer command, and the UE has the transmission configuration stored in it, the UE or the UE RRC layer performs the following operations:
- determine that the stored transfer configuration is invalid, and / or
- release the stored transfer configuration.
[00152] The operation of the UE in this step can also be: the replacement of the stored transfer configuration with the transfer configuration in the other first RRC message received. Mode 7 [00153] Step 1: when a first RRC message is received that includes a transfer command from a source base station, the behavior performed by the UE or the UE's RRC layer includes storing the transfer configuration.
[00154] Optionally, the transfer configuration includes all or part of the configuration in the RRC message that includes the transfer command; or, optionally, the transfer configuration includes the configuration in the transfer command.
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32/68 [00155] Optionally, the transfer is a conditional transfer, that is, the transfer command includes information about a first condition, and when the first condition is met, the UE starts to execute a transfer procedure.
[00156] For example, the first condition may be a measurement event, for example, the first condition may be that the signal quality of a neighboring cell is higher than that of a serving cell by a threshold over a period of time. The neighboring cell corresponds to the target cell for transfer.
[00157] Optionally, the transfer command includes a combination of one or more of the target cell's mobility control information (such as a cell identifier, a cell frequency, and random access information), system information, as well such as a radio resource configuration, a measurement configuration, safety information, and a secondary UE cell configuration in a target cell.
[00158] Step 2: when the UE transfer is successful, the UE or the UE's RRC layer performs the following operations:
- determine that the stored transfer configuration is invalid, and / or
- release the stored transfer configuration.
[00159] The successful transfer of the UE can be characterized by the fact that the UE sends a complete transfer message (successful), that is, a complete RRC connection reconfiguration message, to the target cell.
Mode 8: Transfer configuration management method on the base station side [00160] Corresponding to Mode 1, this mode is implemented on a source base station in a transfer. For example, this modality can be implemented by the base station
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33/68 shown in Figure 5.
[00161] Step 1: an RRC message is provided to the UE, and the RRC message includes a validity timer configuration. The RRC message can be a first RRC message that includes a transfer command. The validity timer is used to manage a transfer configuration. For example, the RRC message can be released to the UE by the sending unit 510 at the base station 500 shown in Figure 5.
[00162] Optionally, the transfer configuration includes all or part of the configuration in the RRC message that includes the transfer command; or, optionally, the transfer configuration includes the configuration in the transfer command.
[00163] Optionally, the transfer is a conditional transfer, that is, the transfer command includes information about a first condition, and when the first condition is met, the UE begins to execute a transfer procedure.
[00164] For example, the first condition may be a measurement event, for example, the first condition may be that the signal quality of a neighboring cell is higher than that of a serving cell by a threshold over a period of time. The neighboring cell corresponds to the target cell for transfer.
[00165] Optionally, the transfer command includes a combination of one or more of the target cell's mobility control information (such as a cell identifier, a cell frequency, and random access information), system information, as well such as a radio resource configuration, a measurement configuration, safety information, and a secondary UE cell configuration in a target cell.
[00166] Optionally, step 2: when the timer is executed, the corresponding transfer is interrupted or canceled. Per
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34/68 example, the corresponding transfer can be interrupted or canceled by transfer management unit 520 at base station 500 shown in Figure 5.
[00167] Similarly, this modality can be applied to a scenario that has a plurality of transfer commands or a plurality of transfer target cells. In this scenario, the validity timer and / or its value can be shared by a plurality of transfer commands or a plurality of target cells, or it can be configured to be distinguishable for each transfer command or target cell. In this scenario, the configuration and steps in this mode are both configured to be distinguishable by a transfer command or a target cell, that is, only related operations are performed for the corresponding target cell or the associated target cell.
[00168] Before step 1, the method optionally includes: receiving, from a target cell, a transfer acknowledgment message, the transfer acknowledgment message including a validity timer configuration, and the message is an X2 / Xn message, and X2 / Xn is an interface between base stations and may have other names. That is, in this case, the timer is configured by the target cell. For example, a transfer acknowledgment message can be received from the target cell by the receiving unit 530 at the base station 500 shown in Figure 5.
[00169] As in Modality 1, the method previously mentioned in this modality is also applicable to a scenario without transfer, such as EU-based mobility, and it is also like the cell re-selection. The following modalities are described in combination with EU-based mobility.
[00170] In one mode, the base station sends a configuration
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35/68 re-selection for the UE, with the cell re-selection parameter being sent via dedicated signaling, such as an RRC connection release message, an RRC connection reconfiguration message, and the like. The UE performs cell reselection, according to the received reselection configuration. Cell re-selection takes place in an RRC idle state or an inactive RRC state. The UE manages the cell reselection configuration received based on the validity timer. The validity timer can be configured by means of radio broadcasting signaling or by dedicated signaling. In addition, the validity timer can be included in the cell reselection configuration to be configured for the UE together with the cell reselection configuration via dedicated signaling. The cell reselection setting is used for EU-based mobility, and is still used for cell reselection, and the name of the cell reselection setting can also be other names such as mobility control information. idle state or idle state mobility control information.
Mode 9 [00171] Corresponding to Mode 2, this mode is implemented in a source base station in a transfer. For example, this modality can be implemented by the base station shown in Figure 5.
[00172] Step 1: a RRC message is provided to the UE, and the RRC message includes a second condition configuration. The RRC message can be a first RRC message that includes a transfer command. The second condition is used to determine when the transfer configuration is valid or is used to determine whether to release the transfer configuration. For example, the RRC message can be released
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36/68 to the UE via the sending unit 510 at the base station 500 shown in Figure 5.
[00173] Optionally, the transfer is a conditional transfer, that is, the transfer command includes information about a first condition, and when the first condition is met, the UE starts to execute a transfer procedure.
[00174] Optionally, the transfer configuration includes all or part of the configuration in the RRC message that includes the transfer command; or, optionally, the transfer configuration includes the configuration in the transfer command.
[00175] Optionally, the transfer command includes a combination of one or more of the target cell's mobility control information (such as a cell identifier, a cell frequency, and random access information), system information, as well such as a radio resource configuration, a measurement configuration, safety information, and a secondary UE cell configuration in a target cell.
[00176] Optionally, this modality includes Step 2, and the base station ceases or cancels the corresponding transfer when a second condition is met. The second condition that is met can be a determination made according to an EU measurement report. The UE measurement report is a measurement report that is triggered by the UE and sent by the UE to the base station when the second configured condition is satisfied.
[00177] Similarly, this modality can be applied to a scenario that has a plurality of transfer commands or a plurality of transfer target cells. In this scenario, the configuration of the second condition can be shared by a plurality of transfer commands or a plurality of target cells, or it can be configured to be distinguishable for each command.
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37/68 transfer or target cell. In this scenario, the configuration and steps in this mode are both configured to be distinguishable by a transfer command or a target cell, that is, only related operations are performed for the corresponding target cell or the associated target cell.
[00178] Before step 1, the method optionally includes: receiving, from a target cell, a transfer acknowledgment message, the transfer acknowledgment message including a second condition configuration, and the message is a X2 / Xn message, and X2 / Xn is an interface between base stations and may have other names. That is, in this case, the second condition is configured by the target cell. For example, a transfer acknowledgment message can be received from the target cell by the receiving unit 530 at base station 500 shown in Figure 5.Modality 10 [00179] Corresponding to Modality 3, this modality is implemented in a source base station in a transfer.
[00180] Step 1: indication information is delivered to the UE. Referral information is used to instruct the UE to cancel the corresponding transfer. They can be included in the RRC message or can be signaled by the MAC. In another expression, UE information is used to instruct the UE to release the corresponding transfer configuration.
[00181] Optionally, the transfer is a conditional transfer, that is, the transfer command includes information about a first condition, and when the first condition is met, the UE begins to execute a transfer procedure.
[00182] For example, the first condition may be a measurement event, for example, the first condition may be that the signal quality of a neighboring cell is higher than that of a serving cell
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38/68 by a threshold over a period of time. The neighboring cell corresponds to the target cell for transfer.
[00183] Optionally, the transfer configuration includes all or part of the configuration in the RRC message that includes the transfer command; or, optionally, the transfer configuration includes the configuration in the transfer command.
[00184] Optionally, the transfer command includes a combination of one or more mobility control information for a target cell (such as a cell identifier, a cell frequency, and random access information), system information, as well as a radio resource configuration, a measurement configuration, safety information, and a secondary UE cell configuration in a target cell.
[00185] Optionally, before Step 1, the method also includes receiving a measurement result (measurement report) reported by the UE.
[00186] Optionally, after Step 1, the method also includes Step 2: receiving a reply / signaling message from the UE.
[00187] This modality is also applicable to a scenario that has a plurality of transfer commands or a plurality of transfer target cells. In this scenario, the above operation is performed individually for a target cell. Specifically, the indication of information delivered by the base station can optionally include a target cell identifier or an identifier that can be associated with a certain transfer command or a specific target cell.
[00188] The following modalities are provided to illustrate a transfer configuration management method on the base station side, which is performed on a target base station on a
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39/68 transfer. For example, this modality can be implemented by the base station shown in Figure 5.
Mode 11 [00189] Corresponding to Mode 1, this mode is implemented in a target base station in a transfer.
[00190] Step 1: a transfer acknowledgment message is sent to a source base station, the transfer acknowledgment message includes a validity timer configuration, and the message is an X2 / Xn message, and X2 / Xn is an interface between base stations and may have other names. That is, in this case, the timer is configured by the target cell. Optionally, the timer can be included in an inter-node RRC message (inter-node RRC) in the transfer acknowledgment message. The validity timer is used to manage a transfer configuration. For example, the transfer acknowledgment message can be sent to the source base station by sending unit 510 at base station 500 shown in Figure 5. [00191] Optionally, the transfer configuration includes all or part of the configuration in the message RRC that includes the transfer command; or, optionally, the transfer configuration includes the configuration in the transfer command.
[00192] Optionally, the transfer is a conditional transfer, that is, the transfer command includes information about a first condition, and when the first condition is met, the UE starts to execute a transfer procedure. For example, the first condition may be a measurement event, for example, the first condition may be that the signal quality of a neighboring cell is greater than that of a serving cell by a threshold over a period of time. The neighboring cell corresponds to the target cell for transfer.
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40/68 [00193] Optionally, the transfer command includes a combination of one or more of the mobility control information of a target cell (such as a cell identifier, a cell frequency, and random access information), information from the system, as well as a radio resource configuration, a measurement configuration, safety information, and a secondary UE cell configuration in a target cell.
[00194] Optionally, step 2: when the timer is executed, the corresponding transfer is interrupted or canceled. For example, the corresponding transfer can be stopped or canceled by transfer management unit 520 at base station 500 shown in Figure 5.
[00195] Optionally, before Step 1, the method also includes receiving a transfer request message from the source base station.
[00196] Similarly, this modality can be applied to a scenario that has a plurality of transfer commands or a plurality of transfer target cells. In this scenario, the validity timer and / or its value can be shared by a plurality of transfer commands or a plurality of target cells, or it can be configured to be distinguishable for each transfer command or target cell. In this scenario, the configuration and steps in this mode are both configured to be distinguishable by a transfer command or a target cell, that is, only related operations are performed for the corresponding target cell or the associated target cell.
Modality 12 [00197] Corresponding to Modality 2, this modality is implemented in a target base station in a transfer.
[00198] Step 1: a transfer acknowledgment message
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41/68 cia is sent to the source base station, the transfer acknowledgment message includes a second condition configuration, and the message is an X2 / Xn message, and X2 / Xn is an interface between base and can have other names. That is, in this case, the second condition is configured by the target cell. Optionally, the configuration of the second condition can be included in an inter-node RRC message in the transfer acknowledgment message. The second condition is used to determine when the transfer configuration is valid or is used to determine whether to release the transfer configuration.
[00199] Optionally, the transfer is a conditional transfer, that is, the transfer command includes information about a first condition, and when the first condition is met, the UE begins to execute a transfer procedure. For example, the first condition may be a measurement event, for example, the first condition may be that the signal quality of a neighboring cell is greater than that of a serving cell by a threshold over a period of time. The neighboring cell corresponds to the target cell for transfer.
[00200] Optionally, the transfer configuration includes all or part of the configuration in the RRC message that includes the transfer command; or, optionally, the transfer configuration includes the configuration in the transfer command.
[00201] Optionally, the transfer command includes a combination of one or more of the mobility control information of a target cell (such as a cell identifier, a cell frequency, and random access information), system information, as well such as a radio resource configuration, a measurement configuration, safety information, and a secondary UE cell configuration in a target cell.
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42/68 [00202] Optionally, before Step 1, the method also includes receiving a transfer request message from the source base station.
[00203] Similarly, this modality can be applied to a scenario that has a plurality of transfer commands or a plurality of transfer target cells. In this scenario, the configuration of the second condition can be shared by a plurality of transfer commands or a plurality of target cells, or it can be configured to be distinguishable for each transfer command or target cell. In this scenario, the configuration and steps in this mode are both configured to be distinguishable by a transfer command or a target cell, that is, only related operations are performed for the corresponding target cell or the associated target cell.
[00204] The following modality provides a method for indicating / acquiring a conditional transfer capability on an air interface.
Mode 13 [00205] The UE reports its capacity information about supporting a conditional transfer to the base station.
[00206] Conditional transfer means that a transfer command includes information about a first condition, and when the first condition is met, the UE starts executing a transfer procedure. For example, the first condition may be a measurement event, for example, the first condition may be that the signal quality of a neighboring cell is greater than that of a serving cell by a threshold over a period of time. The neighboring cell corresponds to the target cell for transfer.
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43/68 UE capacity information, or may be implemented by other means, for example, by an explicit or implicit indication in other RRC messages. The format is, for example: Conditionalhandover-rxx ENUMERATED {supported}
OPTIONAL, [00208] The base station determines, according to the capacity information above the UE when executing a conditional transfer for mobility of the UE.
[00209] In another modality, the UE reports to the base station its capacity to support EU-based mobility. The mobility-based UE can be cell re-selection in a connected RRC state. It can also refer to a conditional transfer in the connected RRC state above.
[00210] UE capacity information on support of UE-based mobility can be included in a UE capacity information message, or can be implemented by other means, for example, by an explicit or implicit indication in other messages RRC. The format is, for example: UE-based mobility-rxx ENUMERATED {supported}
OPTIONAL, or Connected-cell-reselection-rxx ENUMERATED {supported} OPTIONAL, [00211] The base station determines, according to the capacity information above the UE when performing UE-based mobility to the UE.
[00212] The following modality is used to explain a method for indicating / acquiring a conditional transfer capacity X2 / Xn.
Mode 14
Petition 870190056326, of 6/18/2019, p. 62/99 [00213] A first base station can indicate to a second base station whether the first base station supports conditional transfer. The indication information is transmitted in an X2 / Xn message, and can be, for example, an X2 / Xn / eNB configuration update configuration. X2 / Xn is an interface between base stations and may have other names on other systems.
[00214] Conditional transfer means that a transfer command includes information about a first condition, and when the first condition is met, the UE starts executing a transfer procedure. For example, the first condition may be a measurement event, for example, the first condition may be that the signal quality of a neighboring cell is greater than that of a serving cell by a threshold over a period of time. The neighboring cell corresponds to the target cell for transfer.
[00215] In another implementation of this modality, the source base station indicates, in a transfer request message of a transfer preparation process, to the target base station, that the current transfer is a conditional transfer, and the indication information is loaded into the X2 / Xn message. The target base station can perform the configuration on a message as a transfer command or a transfer response based on that indication, such as the timer described in Mode 1.
[00216] In another implementation of this modality, the target base station indicates, in a transfer acknowledgment message from the transfer preparation process, to the source base station, that the current transfer is a conditional transfer, and the indication information are loaded into the X2 / Xn message. The source base station can perform corresponding operations for the UE based on this indication, such as determining whether the month
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45/68 ma or not maintains communication with the UE after the transfer command is provided.
[00217] The following modality is used to describe a method of executing a transfer on the UE side.
Mode 15 [00218] Step 1: when a first RRC message is received that includes a transfer command from a source base station, the behavior performed by the UE or the RRC layer of the UE includes storing the transfer configuration.
[00219] Optionally, the transfer is a conditional transfer, that is, the transfer command includes information about a first condition, and when the first condition is met, the UE starts to execute a transfer procedure. For example, the first condition may be a measurement event, for example, the first condition may be that the signal quality of a neighboring cell is greater than that of a serving cell by a threshold over a period of time. The neighboring cell corresponds to the target cell for transfer.
[00220] Optionally, the transfer configuration includes all or part of the configuration in the RRC message that includes the transfer command; or, optionally, the transfer configuration includes the configuration in the transfer command.
[00221] Optionally, the transfer command includes a combination of one or more of the target cell's mobility control information (such as a cell identifier, a cell frequency, and random access information), system information, as well such as a radio resource configuration, a measurement configuration, safety information, and a secondary UE cell configuration in a target cell.
[00222] Step 2: When the first condition is met, the UE en
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46/68 via a transfer indication to the base station, the transfer indication being used to inform the base station that the UE is about to start executing a transfer; it can also be described as that transfer indication that is used to inform the base station that the transfer has taken place, or described as notifying the base station that the first condition is met.
[00223] Step 3: the UE performs the transfer, that is, the UE is synchronized to and accesses the target cell. In this step, the UE applies the configuration to the stored transfer command to access the target cell. This step is optional.
[00224] Optionally, after Step 2 and / or before Step 3, the method also includes Step 2A: the UE receives a response from the base station.
[00225] In one mode, whether the UE can or should send a transfer indication after the first condition is met is configured by the base station. That is, the base station uses an RRC message to enable or disable transmission of the transfer indication, and the RRC message can be a system message or an RRC message that includes a transfer command.
[00226] For the execution of Step 2 and Step 2A in this modality, the following modalities 16 to 19 provide some descriptions. It should be noted that its implementations are not limited to those mentioned in modalities 16 to 19.
Modality 16 [00227] In this modality, the transfer indication in Step 2 in Modality 15 is in the form of MAC signaling, that is, the transfer indication is a MAC Control Element (Control Element, CE). The next MAC layer can also be called
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47/68 of that of a MAC entity.
[00228] In one mode, when the first condition in step 1 of Mode 15 is satisfied, an EU RRC layer instructs a lower layer to send a transfer indication to a base station. The base station here refers to a source base station.
[00229] In one embodiment, when an indication to send a transfer indication is received from an upper layer, the EU MAC layer triggers the transmission of a MAC CE transfer indication.
[00230] In one embodiment, the indication of MAC CE transfer corresponds to a dedicated Logical Channel Identity (LCID).
[00231] The MAC CE transfer indication can have multiple formats depending on their different content and sizes. Descriptions of some formats are provided in the following modalities, and it should be noted that the following are merely examples and the formats are not limited to them. In one embodiment, the format can include a bit to indicate whether the UE is about to be delivered to the target cell, or to inform the base station that the first condition has been met. In another embodiment, the format may include a cell identifier, used to indicate a target cell to which the UE is about to be delivered, that is, a target cell that triggers the UE to initiate a transfer, that is, a target cell that meets the first condition. In this embodiment, the number of cell identifiers can be one or multiple, and the cell identifier can also be a base station identifier, a beam identifier, a transmission point (Transmission Point or Transmission and Reception Point) , a TRP identifier, or the like. In another embodiment, the format can be a bitmap, and each bit corresponds to a transfer target cell or a transmission command, and a value of one bit indicates whether a target cell corresponding to the
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48/68 leads a transfer, for example, 0 indicates No, and 1 indicates Yes. In the above modality, in the transfer indication MAC CE, except for valid bits, the other bits can be reserved bits. Figure 3 shows an example of a MAC CE format, where R is a reserved bit, and the HO indication is a valid transfer indication bit.
[00232] In one mode, when the MAC layer triggers the transmission of the MAC CE transfer indication, the MAC UE performs the following operations:
[00233] If there is an uplink resource allocated for new transmission in the current TTI MAC entity, the MAC entity will: if a transfer indication procedure determines that a transfer indication is triggered and is not canceled, and if the resource allocated uplink link can accommodate a MAC CE transfer indication and its corresponding MAC sub-header according to a result of a logical channel prioritization process, command a multiplexing combination procedure to generate and send a MAC CE transfer indication.
[00234] In one mode, when the MAC layer triggers the transmission of the MAC CE transfer indication, the MAC UE performs the following operations:
[00235] If a transfer indication procedure determines that a transfer indication is triggered and is not canceled, the MAC entity will: if there is an uplink resource allocated for new transmission in the TTI MAC entity, command a combination procedure multiplexing to generate and send a CE MAC transfer indication; or if there is no allocated or configured uplink concession, trigger a scheduling request.
[00236] In one modality, in one or more of the following
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49/68 situations, if a transfer indication is sent, the MAC layer will cancel the triggered transmission of the MAC CE transfer indication:
- when an indication to cancel the transmission of a transfer indication is received from an upper layer;
- when MAC is restarted; and
- when a MAC CE transfer indication is included in a MAC PDU to be sent.
[00237] In one mode, when a validity timer stops or ends, the RRC instructs the MAC layer to cancel the transmission of the transfer indication. The validity timer is shown in Mode 1.
[00238] In one mode, for step 2A in Mode 15, a response to the MAC CE transfer indication can be a HARQ ACK / NACK or a specific MAC CE. The specific MAC CE is configured to confirm the transfer to be performed in response to a transfer indication sent by the UE. Optionally, the MAC CE response can also include other information, such as a cell identifier, to indicate the target cell for the transfer. The cell identifier can also be a beam identifier, a base station identifier, and a TRP identifier. The response MAC CE including the cell information may correspond to the case where one or more cell identifiers are included in the transfer indication sent by the UE.
[00239] In one embodiment, the UE initiates a transfer to a target cell when one or more of the following situations occurs:
- when the MAC CE transfer indication is sent; and
- when a reply to the MAC CE transfer indication is received.
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50/68 [00240] In one embodiment, the UE MAC indicates to a higher layer that the transmission of a transfer indication is completed, and the UE RRC performs a transfer to a target cell upon receiving a transfer indication that sends the information complete of a lower layer.
[00241] Optionally, the UE performs a transfer to a target cell, including initial downlink synchronization to the target cell, resetting the MAC, re-establishing PDCP / RLC (optional), and the like. The specific operation of the UE to perform a transfer to a target cell is based on the corresponding transfer operation in the LTE system, and details are not described here again.
[00242] Optionally, the UE determines that the target cell is a cell that satisfies the first associated condition and triggers a transfer, or the UE determines that the target cell is the cell that corresponds to the cell identifier loaded in the response information corresponding to the MAC CE transfer indication.
Mode 17 [00243] In this mode, the transfer indication in Step 2 in Mode 15 is in the form of MAC signaling. Unlike Mode 16, the MAC signaling is not a MAC CE, but a MAC sub-header, that is, the MAC sub-header for the transfer indication does not have a corresponding MAC Service Data Unit (SDU) or MAC CE in the payload MAC behind the MAC header. The next MAC layer can also be called a MAC entity.
[00244] In one mode, when the first condition in step 1 of Mode 15 is satisfied, the RRC UE layer instructs the lower layer to send a transfer indication to the base station. The base station here refers to a source base station.
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51/68 [00245] In one embodiment, when an indication to send a transfer indication is received from an upper layer, the MAC layer UE triggers the transmission of the transfer indication MAC signaling.
[00246] In one embodiment, the MAC indication of transfer indication corresponds to a dedicated Logical Channel Identity LCID.
[00247] The MAC indication of the transfer indication can have multiple formats depending on their different content and sizes. Descriptions of some formats are provided in the following modalities, and it should be noted that the following are merely examples and the formats are not limited to them. In one embodiment, the format can include a bit to indicate whether the UE is about to be delivered to the target cell, or to inform the base station that the first condition has been met. In another implementation, the format may include a cell identifier, used to indicate a target cell to which the UE is about to be delivered, that is, a target cell that triggers the UE to initiate a transfer, that is, a target cell that meets the first condition. In this embodiment, the number of cell identifiers can be one or multiple, and the cell identifier can also be a base station identifier, a beam identifier, a TRP identifier, or the like. In another embodiment, the format can be a bitmap, and each bit corresponds to a transfer target cell or a transmission command, and a value of one bit indicates whether a target cell corresponding to the bit triggers a transfer, for example, 0 indicates No, and 1 indicates Yes. In the above modality, in the MAC indication of transfer indication, except in valid bits, the other bits can be R / E / F / L bits. Figure 4 shows an example of a MAC sub-header format, where bit o can be bit R / E / F / L, and bit R / E / F / L has the same definition as
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52/68 in the MAC sub-header of the LTE system, and the details are not described here again.
[00248] In one embodiment, when the MAC layer triggers the transmission of the transfer indication MAC subheader, the UE MAC performs the following operations:
[00249] If there is an uplink resource allocated for new transmission in the current TTI MAC entity, the MAC entity will: if a transfer indication procedure determines that a transfer indication is triggered and is not canceled, and if the resource allocated uplink can accommodate a transfer indication MAC sub-header according to a result of a logical channel prioritization process, command a multiplexing combination procedure to generate and send a transfer indication MAC subset.
[00250] In one mode, when the MAC layer triggers the transmission of the transfer indication MAC subheader, the UE MAC performs the following operations:
[00251] If a transfer indication procedure determines that a transfer indication is triggered and is not canceled, the MAC entity will: if there is an uplink resource allocated for new transmission in the TTI MAC entity, command a combination procedure multiplexing to generate and send a transfer indication MAC subheader; or if there is no uplink concession allocated or configured, trigger a scheduling request.
[00252] In one mode, in one or more of the following situations, if a transfer indication is sent, the MAC layer will cancel the triggered transmission of the transfer indication MAC subheader:
- when an indication to cancel the transmission of
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53/68 a transfer indication is received from an upper layer;
- when MAC is restarted; and
- when a transfer indication MAC subheader is included in a MAC PDU to be sent.
[00253] In one mode, when a validity timer stops or ends, the RRC instructs the MAC layer to cancel the transmission of the transfer indication. The validity timer is shown in Mode 1.
[00254] In one mode, for step 2A in Mode 15, a response to the transfer indication MAC sub-header can be a HARQ ACK / NACK or a specific MAC CE. The specific MAC CE is configured to confirm the transfer to be performed in response to a transfer indication sent by the UE. Optionally, the MAC CE response can also include other information, such as a cell identifier, to indicate the target cell for the transfer. The cell identifier can also be a beam identifier, a base station identifier, and a TRP identifier. The response MAC CE that includes the cell information may correspond to the case where one or more cell identifiers are included in the transfer indication sent by the UE. [00255] In one embodiment, the UE initiates a transfer to a target cell when one or more of the following situations occurs:
- when the transfer indication MAC sub-header is sent;
- when a transfer indication MAC subheader is received.
[00256] In one embodiment, the UE MAC indicates to a higher layer that the transmission of a transfer indication is completed, and the UE RRC performs a transfer to a target cell upon receiving a transfer indication that sends the information with
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54/68 complete of a lower layer.
[00257] Optionally, the UE performs a transfer to a target cell, including initial downlink synchronization to the target cell, resetting the MAC, re-establishing PDCP / RLC (optional), and the like. The specific operation of the UE to perform a transfer to a target cell is based on the corresponding transfer operation in the LTE system, and details are not described here again.
[00258] Optionally, the UE determines that the target cell is a cell that satisfies the first associated condition and triggers a transfer, or the UE determines that the target cell is the cell that corresponds to the cell identifier loaded in the response information corresponding to the transfer indication MAC subheader.
Mode 18 [00259] In this mode, the transfer indication in Step 2 in Mode 15 is in the form of RRC signaling.
[00260] In one mode, when the first condition in step 1 of Mode 15 is met, the RRC of the UE sends a transfer indication to the base station. The base station here refers to a source base station.
[00261] Descriptions of some transfer statements are provided in the following modalities, and it should be noted that the following is merely an example, and the transfer statements are not limited to them. In one embodiment, the transfer indication can include a bit to indicate whether the UE is about to be delivered to the target cell, or to indicate that the first condition has been met. In another implementation, the transfer indication may include a cell identifier, used to indicate a target cell to which the UE is about to be delivered, that is, a target cell that
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55/68 strings the UE to initiate a transfer, that is, a target cell that meets the first condition. In this embodiment, the number of cell identifiers can be one or multiple, and the cell identifier can also be a base station identifier, a beam identifier, a TRP identifier, or the like. In another embodiment, the transfer indication can be a bitmap, and each bit corresponds to a transfer target cell or a transmission command, and a bit value indicates whether a target cell corresponding to the bit triggers a transfer, for example, 0 indicates No, and 1 indicates Yes. The transfer indication previously mentioned can be a single RRC message, and it can also be an IE in the other RRC messages.
[00262] In one mode, when the RRC layer triggers the transmission of a transfer indication message, the RRC layer releases the transfer indication message to the lower layer for transmission.
[00263] In one mode, for step 2A in Mode 15, a response to the transfer indication can be RRC signaling and can also be a specific MAC CE. The transfer indication response is used to confirm the transfer to be performed in response to the transfer indication sent by the UE. Optionally, the response can also include other information, such as a cell identifier, to indicate the target cell for the transfer. The cell identifier can also be a beam identifier, a base station identifier and a TRP identifier. The response that includes the cell information may correspond to the case where one or more cell identifiers are included in the transfer statement sent by the UE.
[00264] In one embodiment, the UE initiates a transfer to a target cell when one or more of the following situations occurs:
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- when the transfer notice is sent; and
- when a reply to the transfer indication is received.
[00265] Optionally, the UE performs a transfer to a target cell, including initial downlink synchronization to the target cell, resetting the MAC, re-establishing PDCP / RLC (optional) and the like. The specific operation of the UE to perform a transfer to a target cell is based on the corresponding transfer operation in the LTE system, and details are not described here again.
[00266] Optionally, the UE determines that the target cell is a cell that satisfies the first associated condition and triggers a transfer, or the UE determines that the target cell is the cell that corresponds to the cell identifier loaded in the response information corresponding to the transfer indication message.
Mode 19 [00267] In this mode, the transfer indication in Step 2 in Mode 15 is in the form of layer 1 (L1) signaling.
[00268] In one mode, when the first condition in step 1 of Mode 15 is satisfied, the EU RRC triggers L1 to send an indication of transfer from L1 to the base station. The base station here refers to a source base station.
[00269] In one embodiment, the transfer indication signaling may be a specific scheduling request, which uses a specific physical time frequency resource or employs a specific code sequence. The specific term is used to be distinguished from programming requests typically to request an uplink lease.
[00270] In one embodiment, the indication of transfer L1 can be a preamble. The preamble can be a specific preamble
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57/68 allocated by the system for transfer indication purposes, for example, by system information. In another embodiment, the preamble used by the UE to send a transfer indication can be allocated by the base station in an RRC message that includes a transfer command.
[00271] In one mode, for step 2A in Mode 15, a response to the transfer indication may be RRC signaling and may also be a specific MAC CE. The transfer indication response is used to confirm the transfer to be performed in response to the transfer indication sent by the UE. Optionally, the response can also include other information, such as a cell identifier, to indicate the target cell for the transfer. The cell identifier can also be a beam identifier, a base station identifier and a TRP identifier. The response that includes the cell information may correspond to the case where one or more cell identifiers are included in the transfer statement sent by the UE.
[00272] As described in Modality 15, step 2A is optional, that is, the UE does not need to wait for a reply message resulting from the receipt of the transfer indication.
[00273] In one embodiment, the UE initiates a transfer to a target cell when one or more of the following situations occurs:
- when the transfer notice is sent; and
- when a reply to the transfer indication is received.
[00274] Optionally, the UE performs a transfer to a target cell, including initial downlink synchronization to the target cell, resetting the MAC, re-establishing PDCP / RLC (optional) and the like. The specific operation of the UE to perform a transfer to a target cell is based on the operation
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58/68 corresponding transfer information in the LTE system, and details are not described here again.
[00275] Optionally, the UE determines that the target cell is a cell that satisfies the first associated condition and triggers a transfer, or the UE determines that the target cell is the cell that corresponds to the cell identifier loaded in the response information corresponding to the transfer indication message. Mode 20: Method of making a transfer on the side of the base station [00276] This mode can be implemented by the base station 500 shown in Figure 5.
[00277] Step 1: receive a transfer indication message sent by the UE. The transfer indication message can also be described as transfer indication information or a message that includes transfer indication information. The transfer indication is used to inform the base station that the UE is about to start executing a transfer, that is, the transfer indication is used to inform the base station that the transfer occurs. Examples of the transfer indication message are shown in Modes 16 to 19, but are not limited to this. For example, this step can be performed by the receiving unit 530 at the base station 500 shown in Figure 5.
[00278] Step 2: send a reply message to the UE. The reply message is used to reply to the transfer indication sent by the UE, that is, to confirm the transfer. Examples are shown in Modes 16 to 19, but are not limited to that. As described above, step 2 is optional. For example, this step can be performed by sending unit 510 at base station 500 shown in Figure 5.
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59/68 [00279] Optionally, the transfer is a conditional transfer, that is, the transfer command includes information about a first condition, and when the first condition is met, the UE starts to execute a transfer procedure. For example, the first condition may be a measurement event, for example, the first condition may be that the signal quality of a neighboring cell is greater than that of a serving cell by a threshold over a period of time. The neighboring cell corresponds to the target cell for transfer.
[00280] Step 3: cease data transmission and communication with the UE. Once the base station is informed through the previously mentioned steps that the UE is about to initiate a transfer to the target cell, the base station stops transmitting data with the UE to avoid wasting unnecessary resources caused by data transmission / data loss. For example, this step can be performed by transfer management unit 520 at base station 500 shown in Figure 5.
[00281] Step 4: start executing the forwarding of data to the target cell. Once the base station is informed by the previous steps that the UE is about to initiate a transfer to the target cell, the base station triggers forwarding, to the target cell via the X2 / Xn interface, the uplink data or downlink that were not sent or were not recognized successfully. X2 / Xn here is a logical interface between base stations and can have other commands in different systems and scenarios. This request is not limited to that name. For example, this step can be performed by transfer management unit 520 at base station 500 shown in Figure 5.
[00282] Steps 3 and 4 above are both optional. The order to perform the steps above is not limited to this application.
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Mode 21 [00283] The method for setting the first condition for transfer in the above mode is described in that mode.
[00284] In one embodiment, the configuration of the first condition is included in the Measurement Configuration Information Element (IE) like other measurement configurations. For example, the measurement configuration in LTE is included in the measconfig IE, including the corresponding measurement object (measobject), report configuration (reportconfig), measurement identifier (measlD) and the like. Optionally, unlike the measurement configuration in the existing engine, the reportamount, reportinterval, and maxreportcell parameters are not included in the report configuration. The first RRC message comprising a transfer command includes a measlD, as included in the mobility control information IE. Based on measlD, the UE can know that the measurement configuration corresponding to measlD in the measurement configuration IE is for the first condition. For ease of understanding, examples are provided as follows. The first RRC message comprising a transfer command includes a measurement configuration IE and a mobility control information IE, and the measurement configuration IE comprises measurement configurations with 1,2, and 3 measIDs. the mobility control information IE includes the measlD of 2, the UE determines that the transfer is based on the first condition, and the setting of the first condition is a setting corresponding to the measlD of 2. Optionally, if the setting with a measlD of 2 in the measurement setup IE is for the first condition, the UE does not need to run measurement reports.
[00285] In another mode, the configuration of the first condition is included in the measurement configuration IE like other confi
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61/68 measurement settings. For example, the measurement configuration in LTE is included in the measconfig IE, including the corresponding measurement object (measobject), report configuration (reportconfig), measurement identifier (measlD) and the like. Optionally, unlike the measurement configuration in the existing engine, the reportamount, reportinterval, and maxreportcell parameters are not included in the report configuration. A target cell identifier is included in the report configuration or in the measurement object configuration or in the measurement identifier configuration, and the target cell identifier is consistent with the target cell identifier in the mobility control IR. Based on whether the target cell identifier is included in the report configuration or the measurement object or the configuration of the measurement identifier, the UE determines that the measurement configuration corresponding to the report configuration or the configuration of the measurement object or the measurement identifier is used as the first condition.
[00286] In another mode, the indication information can be included in the report configuration or in the configuration of the measurement object or in the configuration of the measurement identifier, whereby the UE determines that the measurement configuration corresponding to the report configuration or the measurement object or measurement identifier setting is used as the first condition. The referral information can be of an enumerated type or a Boolean type, such as conditionalhandover ENUMERATED {true}.
[00287] In another embodiment, the referral information is included in an RRC message that includes a transfer command, and is particularly included in the mobility control IE, and the UE determines, based on the referral information, that the transfer is carried out based on the first condition, that is, the
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62/68 transfer is performed after the first condition is met. The referral information can be of an enumerated type or a Boolean type, such as conditionalhandover ENUMERATED {true}.
Mode 22: L2 processing method in a transfer [00288] This mode refers to the UE side and provides a method used by the UE to process L2 according to a base station indication.
[00289] Step 1: an RRC message delivered by the base station and comprising a transfer command is received.
[00290] Step 2: L2 is processed according to the RRC message or the transfer command in step 1.
[00291] For step 2, in one mode, if the RRC message or the transfer command indicates that the PDCP does not need to be re-established, the UE does not re-establish the PDCP when using the configuration in the transfer command to perform the transfer. In one embodiment, if the RRC message or the transfer command indicates that the RLC does not need to be reset, the UE does not reset the RLC when it uses the configuration on the transfer command to perform the transfer. In one mode, if the RRC message or the transfer command indicates that the L2 does not need to be reset, the UE does not reset the PDCP and RLC when using the configuration on the transfer command to perform the transfer. In one mode, if the RRC message or the transfer command indicates that the PDCP needs to be reset, the UE resets the PDCP when it uses the configuration on the transfer command to perform the transfer. In one mode, if the RRC message or the transfer command indicates that the RLC needs to be reset, the UE restores the RLC when it uses the configuration on the transfer command to perform the transfer.
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63/68 co. In one mode, if the RRC message or the transfer command indicates that the L2 needs to be reset, the UE restores the PDCP and RLC by using the configuration in the transfer command to perform the transfer. In one embodiment, if the indication to indicate whether the PDCP needs to be reset is not included in the RRC message or in the transfer command, the UE resets the PDCP by default when using the configuration in the transfer command to perform the transfer. In one mode, if the indication to indicate whether the RLC needs to be reset is not included in the RRC message or in the transfer command, the UE restores the RLC by default when using the configuration in the transfer command to perform the transfer. In one mode, if the indication to indicate whether the L2 needs to be reset is not included in the RRC message or in the transfer command, the UE resets the PDCP and RLC by default when using the configuration in the transfer command to perform the transfer.
[00292] Through this modality, the UE can determine, based on the indication of the base station, if it is necessary to restore the PDCP or RLC entity, thus avoiding the overloads and latency caused by the unnecessary restoration of the PDCP or RLC entity.
[00293] The methods and devices related according to the present application have been described above together with the preferred modalities. Those skilled in the art should understand that the methods shown above are exemplary only. The method according to the present application is not limited to the steps or sequences shown above. The network node and user equipment shown in the figures can include more modules; for example, the network node and user equipment can also include modules that can be developed or developed in the future to be
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64/68 applied to a base station or UE, and the like. Various identifiers shown above are exemplary only, and are not intended to limit this application. This application is not limited to specific information elements that serve as examples of such identifiers. Those skilled in the art can make several changes and modifications according to the teachings of the illustrated modalities.
[00294] It should be understood that the modalities described above of the present application can be implemented through software, hardware or a combination of software and hardware. For example, various components of the base station and user equipment in the above modes can be implemented across multiple devices, and these devices include, but are not limited to: an analog circuit device, a digital circuit device, a circuit digital signal processing (DSP), a programmable processor, an application specific integrated circuit (ASIC), an array of field programmable ports (FPGA), and a complex programmable logic device (CPLD), and the like.
[00295] In this order, the term base station refers to a switching and data control center for mobile communications with great transmission power and wide coverage area, including programming of resource allocation and reception and transmission functions. Dice. The term user equipment refers to a mobile user terminal, such as a terminal device capable of wirelessly communicating with a base station or micro-base station, such as a mobile phone, laptop or the like.
[00296] In addition, the modalities of the present application disclosed herein can be implemented in a computer program product. More specifically, the computer program product
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65/68 is a product supplied on a computer-readable medium that includes computer program logic encoded on it. When executed on a computing device, computer program logic provides related operations to implement the technical solutions of the present application described above. The logic of the computer program allows a processor to perform the operations (methods) described in the modalities of this application when the product is executed on at least one processor of a computing system. Such a provision of the present application is generally provided as software, code and / or other data structures, which are configured or encoded on a computer-readable medium, such as an optical disc (for example, a CD-ROM), a floppy disk or a hard disk, or other means, such as firmware or microcode in one or more read-only memory (ROM) integrated circuits, random access memory (RAM) or read-only programmable memory (PROM), or downloadable software images, databases shared data, etc., in one or more modules. Software, firmware or such a configuration can be installed on a computing device, so that one or more processors on the computing device perform the technical solutions described in the modalities of this application.
[00297] In addition, each functional module or feature of the base station device and terminal device in each of the above modes can be implemented or executed by a circuit, which is generally formed by one or more integrated circuits. Circuits designed to perform the various functions described here may include general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs) or general-purpose integrated circuits, field programmable port arrays (FPGAs) or other programmable logic devices, gates
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66/68 distinct or transistor logic, or distinct hardware components, or any combination of the above. The general purpose processor can be a microprocessor, or it can be any existing processor, a controller, a microcontroller, or a state machine. The general purpose processor mentioned above or each circuit can be configured with a digital circuit or it can be configured with a logic circuit. In addition, when an advanced technology capable of replacing current integrated circuits appears due to advances in semiconductor technology, the present application may also use the integrated circuits obtained with the use of such advanced technology.
[00298] Although this application has been shown in connection with the preferred modalities of this application, those skilled in the art will understand that various modifications, substitutions and changes can be made to this application without departing from the character and scope of this application. Consequently, this application must not be defined by the modalities described above, but must be defined by the appended claims and their equivalents.
[00299] The program running on the device according to the present order can be a program that allows the computer to implement the functions of the modalities of this order by controlling the central processing unit (CPU). The program, or the information processed by the program, can be temporarily stored in volatile memory (for example, random access memory (RAM)), hard disk drive (HDD), non-volatile memory ( eg flash memory) or other memory systems.
[00300] The program to implement the functions of the modalities of this application can be recorded on a legitimate recording medium
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67/68 via computer. The corresponding functions can be obtained by reading programs recorded on the recording media and executing them by the computer system. The so-called computer system can be a computer system integrated into the device, which can include operating systems or hardware (for example, peripherals). The computer-readable recording medium can be a semiconductor-based recording medium, an optical recording medium, a magnetic recording medium, a short-term dynamic memory program, or any other computer-readable recording medium.
[00301] Various features or functional modules of the device used in the above modes can be implemented or executed by circuits (for example, monolithic or multiple chip integrated circuits). Circuits designed to perform the functions described here may include general purpose processors, digital signal processors (DSPs), application specific integrated circuits (ASICs), field programmable port arrays (FPGAs) - field programmable gate arrays) or other programmable logic devices, different gates or transistor logic, or different hardware components, or any combination of the above. The general purpose processor can be a microprocessor, or it can be any existing processor, a controller, a microcontroller, or a state machine. The circuit can be a digital circuit or an analog circuit. Even if new integrated circuit technologies emerge that replace existing integrated circuits due to advances in semiconductor technology, the present order can still be implemented using these new integrated circuit technologies.
[00302] The program running on the device according to the
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68/68 this order can be a program that allows the computer to implement the functions of the modalities of this order by controlling the central processing unit (CPU). The program, or the information processed by the program, can be temporarily stored in volatile memory (for example, random access memory (RAM)), hard disk drive (HDD), non-volatile memory ( eg flash memory) or other memory systems.
[00303] Furthermore, this application is not limited to the modalities described above. Although several examples of the described modalities have been presented, the present application is not limited to them. Fixed or non-mobile electronic devices installed indoors or outdoors, such as audio / video (AV) equipment, kitchen equipment, cleaning equipment, air conditioning, office equipment, vending machines and other household appliances can be used as terminal devices or communication devices.
[00304] The modalities of this application have been described in detail above with reference to the attached drawings. However, the specific structures are not limited to the above modalities, and this application also includes any design changes that do not depart from the main idea of this application. In addition, various modifications can be made to the present application within the scope of the claims, and the modalities resulting from the appropriate combination of the technical means presented in different modalities are also included in the technical scope of the present application. In addition, components with the same effect described in the above modalities can be replaced with each other.

权利要求:
Claims (30)
[1]
1. Method performed on user equipment (UE), characterized by comprising:
receiving, from a base station, a first radio resource control (RRC) message comprising a transfer command;
determine whether a first condition included in the first RRC message is satisfied; and if the first condition is met, send a transfer indication to the base station, the transfer indication being used to inform the base station that the UE is about to start executing a transfer.
[2]
Method according to claim 1, characterized in that it further comprises:
receive a response to the transfer indication from the base station before executing the transfer.
[3]
3. Method according to claim 2, characterized by the response comprising an element of Media Access Control (MAC) control.
[4]
Method according to claim 1, characterized in that the transmission of the transfer indication is configured by the base station by means of an RRC message.
[5]
5. Method according to claim 1, characterized by the fact that sending an indication of transfer to the base station comprises:
send the transfer indication to the base station through a MAC layer.
[6]
Method according to claim 5, characterized in that it further comprises:
start to perform the transfer after the indication of
Petition 870190056326, of 6/18/2019, p. 88/99
2/6 transfer be sent to the base station via the MAC layer.
[7]
7. Method according to claim 5, characterized in that it sends the transfer indication to the base station through a MAC layer comprising:
determine if an uplink resource exists for new transmission in a current transmission time interval (TTI); and if there is an uplink resource for new transmission, the transfer indication indicates that the transfer is triggered and is not canceled, and the uplink resource is able to accommodate the transfer indication and a corresponding MAC sub-header, generate and send the transfer indication, the transfer indication comprising a MAC control element.
[8]
8. Method according to claim 5, characterized in that it sends the transfer indication to the base station through a MAC layer comprising:
determine if an uplink resource exists for new transmission in a current TTI; and if there is an uplink resource for new transmission, and the transfer indication indicates that the transfer is activated and is not canceled, generate and send the transfer indication, the transfer indication being a MAC control element; or if there are no uplink resources for new transmission, trigger a scheduling request.
[9]
9. Method according to claim 5, characterized in that in one or more of the following cases, if the transfer of the transfer indication is activated, the transfer of the transfer indication is canceled:
Petition 870190056326, of 6/18/2019, p. 89/99
3/6
- an indication of a top layer of the MAC layer to cancel the transmission of the transfer indication is received;
- MAC is reset; and
- the transfer indication is comprised in a MAC PDU to be sent.
[10]
Method according to claim 5, characterized in that the transfer indication comprises a dedicated logical channel identity (LCID).
[11]
11. User equipment (UE), characterized by comprising:
a receiving unit configured to receive, from a base station, a first radio resource control (RRC) message comprising a transfer command;
a determination unit, configured to determine whether a first condition comprised in the first RRC message is satisfied; and a sending unit, configured to send, if the first condition is met, a transfer indication to the base station, the transfer indication being used to inform the base station that the UE is about to start executing a transfer.
[12]
12. User equipment according to the claim
11, characterized by the fact that the receiving unit is still configured for:
receive a response to the transfer indication from the base station before executing the transfer.
[13]
13. User equipment according to claim
12, characterized by the fact that the response comprises an element of Media Access Control (MAC) control.
Petition 870190056326, of 6/18/2019, p. 90/99
4/6
[14]
14. User equipment according to claim 11, characterized in that the transmission of the transfer indication is configured by the base station through an RRC message.
[15]
15. User equipment according to claim 11, characterized in that the sending unit is configured for:
send the transfer indication to the base station through a MAC layer.
[16]
16. User equipment according to claim 15, characterized in that the transfer is initiated after the transfer indication is sent to the base station via the MAC layer.
[17]
17. User equipment according to claim 15, characterized in that the sending unit is configured for:
determine if an uplink resource exists for new transmission in a current transmission time interval (TTI); and if there is an uplink resource for new transmission, the transfer indication indicates that a transfer is triggered and is not canceled, and the uplink resource is able to accommodate the transfer indication and a corresponding MAC sub-header, generate and send the transfer indication, the transfer indication comprising a MAC control element.
[18]
18. User equipment according to claim 15, characterized in that the sending unit is configured to:
determine whether an uplink feature exists for
Petition 870190056326, of 6/18/2019, p. 91/99
5/6 new transmission in a current TTI; and if there is an uplink resource for new transmission, and the transfer indication indicates that the transfer is activated and is not canceled, generate and send the transfer indication, the transfer indication being a MAC control element; or if there are no uplink resources for new transmission, trigger a scheduling request.
[19]
19. User equipment according to claim 15, characterized in that, in one or more of the following cases, if the transfer of the transfer indication is triggered, the transfer of the transfer indication is canceled:
- an indication of a top layer of the MAC layer to cancel the transmission of the transfer indication is received;
- MAC is reset; and
- the transfer indication is comprised in a MAC PDU to be sent.
[20]
20. User equipment according to claim 15, characterized in that the transfer indication comprises a dedicated logical channel identity (LCID).
[21]
21. Method performed by a base station, characterized by comprising:
sending a first radio resource control (RRC) message that comprises a transfer command to the user equipment (UE); and receive a transfer indication from the UE.
[22]
22. The method of claim 21, further comprising: sending a reply message to the UE after receiving the transfer indication from the UE.
Petition 870190056326, of 6/18/2019, p. 92/99
6/6
[23]
23. The method of claim 21, further comprising: ceasing data transmission and communication with the UE.
[24]
24. The method of claim 21, further comprising: performing data routing to a target cell.
[25]
25. Method according to claim 21, characterized in that the transmission of the transfer indication is configured by means of an RRC message.
[26]
26. Base station, characterized by comprising:
a sending unit, configured to send a first radio resource control (RRC) message that comprises a transfer command to the user equipment (UE); and a receiving unit, configured to receive a transfer indication from the UE.
[27]
27. Base station according to claim 26, characterized in that the sending unit is further configured to send a reply message to the UE after the receiving unit receives the transfer indication from the UE.
[28]
28. Base station according to claim 26, characterized by further comprising a transfer management unit, configured to cease data transmission and communication with the UE.
[29]
29. Base station according to claim 26, characterized by further comprising a transfer management unit, configured to carry out data forwarding to a target cell.
[30]
30. Base station according to claim 26, characterized in that the transmission of the transfer indication is configured by means of an RRC message.

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法律状态:
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