low latency improvements for cv2x autonomous resource selection and reselection procedure for vehicl

专利摘要:
these are low latency improvements for communication systems, including selection scenarios and / or autonomous activation. a method for communication includes monitoring communication resources in a communication system, determining a set of candidate resources to use for the subsequent transmission of information within a time window so that the time window is minimized based on a parameter of desired communication latency that considers at least one or more of communication channel congestion and a transmission priority, determine a set of lower energy resources from the set of candidate resources, select a low energy resource from the set of lower energy resources, and transmit data on the selected low energy resource. other aspects, modalities and characteristics are also claimed and described.
公开号:BR112019019787A2
申请号:R112019019787
申请日:2018-03-23
公开日:2020-04-22
发明作者:GULATI Kapil；Patil Shailesh；Kumar Baghel Sudhir；Viet Nguyen Tien；Wu Zhibin
申请人:Qualcomm Inc；
IPC主号:

专利说明:

LOW LATENCY IMPROVEMENTS FOR SELECTING PROCEDURE AND RESELECTION OF AUTONOMOUS RESOURCE CV2X FOR VEHICLE-BY-VEHICLE COMMUNICATIONS
RELATED APPLICATIONS [0001] This application claims the benefit of provisional patent application No. US 62 / 476,330, entitled Low Latency Enhancements to CV2X Autonomous Resource Selection and Re-Selection Procedure For Vehicle-To-Vehicle Communications, filed on March 24, 2017, of which the content is incorporated into this document as a reference for all applicable purposes and in its entirety as if completely presented below.
TECHNICAL FIELD [0002] The technology discussed below refers, in general, to wireless communication systems, and more particularly, to the establishment of a communication channel for vehicle-to-vehicle communications. Certain modalities enable and provide communication techniques that may include resource allocation to establish one or more communication channels for vehicle-to-vehicle and vehicle-to-vehicle communications (for example, in congested scenarios).
INTRODUCTION [0003] Wireless communications devices,
sometimes mentioned With "c ' equipment in user (EU), can if to communicate with a station- base or they can to communicate directly with another EU When a UE moves communicates directly with another EU , a communication is
referred to as device-to-device (D2D) communication. In particular use cases, a UE can be a
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2/54 wireless communication device, such as a portable cell phone device, can either be a vehicle, like an automobile, or it can be any other connected device.
[0004] When the UE is a vehicle, such as a car, D2D communication can be referred to as vehicle-to-vehicle (V2V) communication. Other vehicle-based UE communications may include vehicle for all (V2X), which may include V2V, vehicle for infrastructure (V2I), vehicle for network (V2N) and pedestrian vehicle (V2P). An example of an interface over which a UE can directly communicate with another UE, as in a D2D communication methodology, can be mentioned as a PC5 interface, which is a communication interface that allows devices to communicate directly over a side link communication channel. A side link communication channel is one that is established directly between UEs and that does not necessarily use a base station. Cellular V2X (CV2X) can be used to improve V2X communication by leveraging existing long-term evolutionary communication networks (LTE), and advances to LTE networks, to establish a unified connectivity platform in addition to V2V communication. Vehicle communications for everything (V2X), and particularly CV2X communications, will become increasingly important in the future for collision avoidance and autonomous driving.
BRIEF SUMMARY [0005] Each of several deployments of
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3/54 systems, methods and devices covered by the scope of the appended claims have several aspects, none of which is solely responsible for the desirable attributes described in this document. Without limiting the scope of the appended claims, some prominent features are described in this document.
[0006] Details of one or more deployments of the material described in this specification are presented in the attached drawings and in the description below. Other features, aspects and advantages will be evident from the description, drawings and claims. It is noted that the relative dimensions of the following Figures may not be drawn to scale.
[0007] One aspect of the revelation provides a method for communication. The method modalities may include monitoring communication resources in a communication system, determining a set of candidate resources to use for the subsequent transmission of information within a time window so that the time window is minimized based on a parameter desired communication latency that considers at least one or more of the communication channel congestion and a subsequent transmission priority, determine a set of lower energy resources from the set of candidate resources, select a low energy resource from of the lowest energy resource pool, and transmit data on the selected low energy resource.
[0008] Another aspect of the disclosure provides a communication device that includes
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4/54 user (UE) configured to monitor communication resources in a communication system, the UE configured to determine a set of candidate resources to use for the subsequent transmission of information within a time window, so that the time is minimized based on a desired communication latency parameter that considers at least one or more of the communication channel congestion and a subsequent transmission priority, the UE configured to determine a lower energy resource pool from the pool candidate resources, the UE configured to select a low energy resource from the lowest energy resource set, and the UE configured to transmit data on the selected low energy resource.
[0009] Another aspect of the disclosure provides a communication device that includes a user equipment (UE) configured to monitor communication resources in a communication system, the UE configured to determine a set of candidate resources to use for the subsequent transmission. information within a time window, so that the time window is minimized based on a desired communication latency parameter that considers at least one or more of the communication channel congestion and a subsequent transmission priority, the window minimized time based on at least one of a busy channel ratio measurement that is indicative of communication channel congestion and packet priority information that is indicative of transmission priority
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5/54, the UE configured to determine a lower energy resource pool from the candidate resource pool, the UE configured to select a low energy resource pool from the lower energy resource pool, and the UE configured to transmit data on the selected low power resource.
[0010] Another aspect of the disclosure provides a device that includes a means to monitor communication resources in a communication system, a means to determine a set of candidate resources to use for the transmission of information within a time window, so that the time window is minimized based on a desired communication latency parameter that considers at least one or more of the communication channel congestion and a subsequent transmission priority, a means of determining a lower energy resource set from the candidate resource set, means for selecting a low energy resource from the lowest energy resource set, and means for transmitting data on the selected low energy resource.
[0011] Another aspect of the disclosure provides a non-transitory, computer-readable medium that stores computer-executable code for communication, code executable by a processor to monitor communication resources in a communication system, determine a set of candidate resources to use for the subsequent transmission of information within a time window so that the time window is minimized based on a desired communication latency parameter
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6/54 that considers at least one or more of communication channel congestion and a transmission priority, determine a set of lower energy resources from the set of candidate resources, select a low energy resource from the set of lower energy resources, and transmit data on the selected low energy resource.
BRIEF DESCRIPTION OF THE DRAWINGS [0012] In the Figures, similar reference numbers refer to similar parts throughout the different views, except where otherwise indicated. For reference numbers with letter character designations like 102a or 102b, letter character designations can differentiate between two parts or elements present in the same figure. Letter character designations for reference numbers can be omitted when a reference number is intended to cover all parts that have the same reference number in all figures.
[0013] Figure 1 is a diagram that illustrates an example of a network architecture, according to several aspects of the present disclosure.
[0014] Figure 2 is a diagram that illustrates an example of an access network, according to several aspects of the present disclosure.
[0015] Figure 3 is a diagram illustrating an example of a DL frame structure in LTE, according to various aspects of the present disclosure.
[0016] Figure 4 is a diagram illustrating an example of a UL frame structure in LTE, according to various aspects of the present disclosure.
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7/54 [0017] Figure 5 is a diagram that illustrates an example of a radio protocol architecture for the user and control plans, according to several aspects of the present disclosure.
[0018] Figure 6 is a diagram that illustrates an example of an evolved Node B and user equipment in an access network, according to various aspects of the present disclosure.
[0019] Figure 7 is a diagram of a device-to-device communications system, according to various aspects of the present disclosure.
[0020] Figure 8 is a diagram that illustrates an example of a whiteboard structure, according to different aspects of the present disclosure.
[0021] Figure 9 is a diagram that illustrates an example of a whiteboard structure, according to various aspects of the present disclosure.
[0022] Figure 10 is a call flow chart that illustrates an exemplary embodiment of the present disclosure.
[0023] Figure 11 is a lookup table that shows exemplifying preconfiguration / RRC (radio resource control) information. [0024] Figure 12 is a flow chart that illustrates an example of a method for communication, according to several aspects of the present disclosure.
[0025] Figure 13 is a functional block diagram of a device for a communication system, according to several aspects of the present disclosure.
DETAILED DESCRIPTION
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8/54 [0026] The word exemplifier is used in this document to mean serving as an example, case or illustration. Any aspect described in this document as an example should not necessarily be interpreted as preferential or advantageous over other aspects.
[0027] Various aspects of telecommunication systems will now be presented with reference to various devices and methods. These devices and methods will be described in the following detailed description and illustrated in the accompanying drawings by means of various blocks, components, circuits, processes, algorithms, etc. (collectively referred to as elements). These elements can be implemented using electronic hardware, computer software or any combination of them. Whether these elements can be deployed as hardware or as software depends on the particular application and the design restrictions imposed on the general system.
[0028] As an example, an element or any portion of an element or any combination of elements can be implemented as a processing system that includes one or more processors. Examples of processors include microprocessors, microcontrollers, graphics processing units (GPUs), central processing units (CPUs), application processors, digital signal processors (DSPs), reduced instruction set computing (RISC) processors, systems on a chip (SoC), baseband processors, field programmable port arrangements (FPGAs), programmable logic devices (PLDs),
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9/54 state machines, switching logic, discrete hardware circuits and other suitable hardware configured to perform the various features described throughout this disclosure. One or more processors in the processing system can run the software. The software must be interpreted broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software components, applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, functions, etc., regardless of whether they are called software, firmware, middleware, microcode, hardware description language or otherwise.
[0029] Consequently, in one or more exemplifying modalities, the functions described can be implemented in hardware, software or any combination thereof. If implemented in software, the functions can be stored in, or encoded as, one or more instructions or code in a computer-readable medium. Computer-readable media includes computer storage media. Storage media can be any available media that can be accessed by a computer. As an example, and not a limitation, such computer-readable media may comprise a random access memory (RAM), a read-only memory (ROM), an electrically erasable programmable ROM (EEPROM), optical disk storage, magnetic disk storage, other magnetic storage devices,
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10/54 combinations of the aforementioned types of computer-readable media, or any other media that can be used to store computer-executable code in the form of data structures or instructions that can be accessed by a computer.
[0030] The following description provides examples and does not limit the scope, applicability or examples presented in the claims. Changes can be made to the function and arrangement of the elements discussed without departing from the scope of the disclosure. Various examples may omit, replace or add various procedures or components, as appropriate. For example, the methods described can be performed in a different order than described, and several steps can be added, omitted or combined. In addition, the features described in relation to some examples can be combined into other examples.
[0031] The exemplary modalities of the disclosure are aimed at improving the latency performance of resource selection and reselection of CV2X autonomous resource. According to some aspects, by installing selection and timing features discussed in this document, a balance of low latency requirements with system performance can be achieved in congested scenarios. Latency and performance agreements in congested scenarios, as discussed in this document in more detail, can be beneficial in a variety of CV2X or other communication scenarios.
[0032] As used in this document, the term NR corresponds to a new radio which is a way of
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11/54 refer to a radio interface that can be part of the 5G communication methodology. The term NR can be used interchangeably with the term 5G. Although certain techniques and the description of the technique may be provided with reference to LTE networks, those skilled in the art will understand that other networks can also be used using the described concepts and principles (for example, including 5G or NR networks).
[0033] Figure 1 is a diagram illustrating an LTE 100 network architecture. The LTE 100 network architecture can be called an Evolved Pack System (EPS) 100. EPS 100 can include one or more user devices ( EU) 102, an Evolved UMTS Terrestrial Radio Access Network (E-UTRAN) 104, an Evolved Packet Core (EPC) 110 and Internet Protocol Services (IP) from an Operator 122. EPS can interconnect with other access networks, however, for the sake of simplicity such entities / interfaces are not shown. As shown, EPS provides packet switching services, however, as elements skilled in the art will readily note, the various concepts presented throughout the present disclosure can be extended to networks that provide circuit switching services.
[0034] E-UTRAN 104 includes the evolved Node B (eNB) 106 and other eNBs 108 and may include a Multipoint Coordination Entity (MCE) 128. eNB 106 provides user protocol terminations and control plans for o UE 102. The eNB 106 can be connected to the other eNBs 108 via backhaul traffic (for example, an X2 interface). MCE 128 allocates resources from
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12/54 time / frequency radio for Multicast and Broadcast Multimedia Service (MBMS) evolved (eMBMS) and determines the radio configuration (for example, a modulation and encoding scheme (MCS)) for eMBMS. MCE 128 can be a separate entity or part of an eNB 106. eNB 106 can also be called a base station, a Node B, an access point, a transceiver base station, a radio base station , a radio transceiver, a transceiver function, a set of basic services (BSS), a set of extended services (ESS) or some other suitable terminology. ENB 106 provides an access point to EPC 110 for a UE 102.
[0035] UEs can include a wide variety of components and / or devices. Examples of UEs 102 include a cell phone, a smart phone, a session initiation protocol (SIP) phone, a laptop computer, a personal digital assistant (PDA), a satellite radio, a positioning system device, a multimedia device, a video device, a digital audio player (for example, MP3 player), a camera, a game console, a tablet computer, a smart device, a device that can be worn close to the body or any other device of similar operation. The UE 102 can also be called, by elements skilled in the art, a mobile station, a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless device , a wireless communications device, a remote device, a remote subscriber station, a
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13/54 access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile customer, customer, drone, vehicle, industrial equipment, medical equipment, usable close to the body, entertainment device, recreation device, implantable mammal device or some other suitable terminology. The UE 102 can also be a vehicle, a drone, an automobile or another vehicle.
[0036] In an exemplary embodiment, network architecture 100 can also comprise a 5G communication architecture, or NR, in which eNB 106 can be called a gNodeB (gNB). As used herein, the terms base station and eNB can be used interchangeably with the term gNB.
[0037] eNB 106 is connected to EPC 110. EPC 110 may include a Mobility Management Entity (MME) 112, a Domestic Subscriber Server (HSS) 120, other MMEs 114, a Service Communication Port 116, a Multicast and Multimedia Broadcast Service Communication Port (MBMS) 124, a Multicast and Broadcast Service Center (BM-SC) 126 and a Packet Data Network (PDN) Communication Port 118. A MME 112 is the control node that processes the signaling between UE 102 and EPC 110. In general, MME 112 provides connection and carrier management. All user IP packets are transferred via Service Communication Port 116, which itself is connected to PDN Communication Port 118. PDN Communication Port 118 provides UE IP address allocation as well like other functions. The PDN 118 Communication Port and BM-SC
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126 are connected to IP Services 122. IP Services 122 may include the Internet, an intranet, an IP Multimedia Subsystem (IMS), a PS Streaming Service (PSS) and / or other IP services. The BM-SC 126 can provide functions for the provision and delivery of MBMS user service. The BM-SC 126 can serve as an entry point for transmitting MBMS from a content provider, can be used to authorize and initiate MBMS Bearer Services within a PLMN, and can be used to schedule and deliver MBMS transmissions. The MBMS Communication Port 124 can be used to distribute MBMS traffic to eNBs (for example, 106, 108) that belong to a Single Frequency Broadcast and Multicast (MBSFN) area that broadcasts a particular service and may be responsible for session management (start / stop) and for collecting loading information related to eMBMS.
[0038] Figure 2 is a diagram illustrating an example of an access network 200 in an LTE network architecture. In this example, access network 200 is divided into several cell regions (cells) 202. One or more eNBs of lower potency class 208 may have cell regions 210 that overlap one or more of cells 202. The eNB class lower power 208 may be a femtocell (for example, residential eNB (HeNB)), picocell, microcell or remote radio head (RRH). Macro eNBs 204 are each assigned to a respective cell 202 and are configured to provide an access point to EPC 110 for all UEs 206 in cells 202. There is no centralized controller in this example of a
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15/54 access network 200, however, a centralized controller can be used in alternative configurations. ENBs 204 are responsible for all radio related functions which include radio bearer control, admission control, mobility control, programming, security and connectivity to service communication port 116. An eNB can support one or multiple (for example, example, three) cells (also called sectors). The term cell can refer to the smallest coverage area of an eNB and / or an eNB subsystem that serves a particular coverage area. Additionally, the terms eNB, base station and cell can be used interchangeably in this document.
[0039] The modulation and multiple access scheme employed by the 200 access network may vary depending on the particular telecommunications standard that is implemented. In LTE applications, OFDM is used in DL and SC-FDMA is used in UL to support both frequency division duplexing (FDD) and time division duplexing (TDD). As the elements skilled in the art will readily observe from the detailed description below, the various concepts presented in this document are well suited for LTE applications. However, these concepts can be readily extended to other telecommunication standards that employ other techniques of multiple access and modulation. As an example, these concepts can be extended to Optimized Evolution Data (EV-DO), Ultra-Mobile Broadband (UMB), 5G or other multiple access and modulation techniques. EV-DO and UMB are air interface standards promulgated by the
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Partnership Project 3 Generation 2 (3GPP2) as part of the CDMA2000 family of standards and employs CDMA to provide broadband Internet access to mobile stations. These concepts can also be extended to Universal Terrestrial Radio Access (UTRA) that employs Broadband CDMA (W-CDMA) and other CDMA variants, such as TD-SCDMA; Global System for Mobile Communications (GSM) employing TDMA; and Evolved UTRA (E-UTRA), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20 and OFDM Flash that employs OFDMA. UTRA, E-UTRA, UMTS, LTE and GSM are described in documents of organization 3 GPP. CDMA2000 and UMB are described in documents of the 3GPP2 organization. The actual wireless communication standard and the multiple access technology employed will depend on the specific application and the general design restrictions imposed on the system.
[0040] eNBs 204 can have multiple antennas that support MIMO technology. The use of MIMO technology enables eNBs 204 to explore the spatial domain to support spatial multiplexing, beam formation and transmission diversity. Spatial multiplexing can be used to transmit different data streams simultaneously on the same frequency. The data streams can be transmitted to a single UE 206 to increase the data rate or to multiple UEs 206 to increase the overall system capacity. This is achieved through the spatial pre-coding of each data stream (that is, applying a scaling of an amplitude and a phase) and, then, the transmission of each spatially pre-coded stream through multiple transmission antennas in the DL. Spatial data streams pre
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17/54 encrypted arrive at UE (or UEs) 206 with different spatial signatures, which allows each of the UEs 206 to retrieve the one or more data streams destined for such UE 206. In the UL, each UE 206 transmits a stream spatially precoded data, which allows the eNB 204 to identify the source of each spatially precoded data stream.
[0041] Spatial multiplexing is generally used when channel conditions are favorable. When channel conditions are less favorable, beam formation can be used to focus the transmission energy in one or more directions. This can be achieved through the spatial pre-coding of the data for transmission through multiple antennas. To achieve robust coverage at the edges of the cell, a single current beam forming transmission can be used in combination with the diversity of transmission.
[0042] In the following detailed description, various aspects of an access network will be described with reference to a MIMO system that supports OFDM in the DL. OFDM is a spread spectrum technique that modulates data through numerous subcarriers within an OFDM symbol. Subcarriers are separated at precise frequencies. Spacing provides an orthogonality that allows a receiver to retrieve data from subcarriers. In the time domain, a protection interval (for example, cyclic prefix) can be added to each OFDM symbol to combat inter-OFDM symbol interference. UL can use SC-FDMA in the form of an OFDM signal broadcast by DFT to compensate for the high ratio
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18/54 between average and peak power (PAPR).
[0043] Figure 3 is a diagram 300 that illustrates an example of a DL frame structure in LTE. A frame (10 ms) can be divided into 10 equally sized subframes. Each subframe can include two consecutive time slots. A resource grid can be used to represent two time slots, where each time slot includes a resource block. The resource grid is divided into multiple resource elements.
[0044] In LTE, for a normal cyclic prefix, a resource block contains 12 consecutive subcarriers in the frequency domain and 7 consecutive OFDM symbols in the time domain, for a total of 84 resource elements. For an extended cyclic prefix, a resource block contains 12 consecutive subcarriers in the frequency domain and 6 consecutive OFDM symbols in the time domain, for a total of 72 resource elements. Some of the resource elements, indicated as R 302, 304, include DL reference signals (DL-RS). DL-RSs include cell-specific RSs (CRS) (also sometimes referred to as common RSs) 302 and EU-specific RSs (UE-RS) 304. UE-RS 304s are transmitted in the resource blocks through which the channel corresponding physical DL (PDSCH) is mapped. The number of bits loaded by each resource element depends on the modulation scheme. Thus, the more resource blocks a UE receives and the larger the modulation scheme, the higher the data rate for the UE.
[0045] Figure 4 is a diagram 400 that illustrates an example of a UL frame structure in LTE. The
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19/54 resource blocks available to UL can be partitioned into a data section and a control section. The control section can be formed at the two edges of the system bandwidth and can be configurable in size. The resource blocks in the control section can be assigned to the UEs for the transmission of control information. The data section can include all feature blocks not included in the control section. The UL frame structure results in the data section that includes contiguous subcarriers, which can allow a single UE to be assigned to all contiguous subcarriers in the data section.
[0046] A UE can be assigned to resource blocks 410a, 410b in the control section to transmit control information to an eNB. The UE can also be assigned to resource blocks 420a, 420b in the data section to transmit data to the eNB. The UE can transmit control information on a physical UL control channel (PUCCH) in the resource blocks assigned in the control section. The UE can transmit data or both data and control information on a shared physical UL channel (PUSCH) in the resource blocks assigned in the data section. A UL transmission can span both slots in a subframe and can skip through the frequency.
[0047] A set of resource blocks can be used to perform initial system access and achieve UL synchronization on a physical random access channel (PRACH) 430. PRACH 430 loads a random string and cannot load any signaling / UL data. Each random access preamble takes up bandwidth
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20/54 that corresponds to six consecutive resource blocks. An initial frequency can be specified over the network. That is, the transmission of the preamble of random access is restricted to certain time and frequency resources. There is no jump in frequency for PRACH. The PRACH attempt is loaded in a single subframe (1 ms) or in a sequence of a few contiguous subframes and a UE can perform a single PRACH attempt per frame (10 ms).
[0048] Figure 5 is a diagram 500 that illustrates an example of a radio protocol architecture for the user and control plans in LTE, according to several aspects of the present disclosure. The radio protocol architecture for the UE and eNB is shown with three layers: Layer 1, Layer 2 and Layer 3. Layer 1 (layer Ll) is the bottom layer and implements several signal processing functions. physical layer. The Ll layer will be referred to in this document as the physical layer 506. Layer 2 (layer L2) 508 is above the physical layer 506 and is responsible for the link between the UE and the eNB through the physical layer 506. Layer 3 (layer L3) can include one or more applications and a radio resource control (RRC) 516 sublayer.
[0049] In the user plane, layer L2 508 includes a media access control (MAC) sublayer 510, a radio link control (RLC) 512 sublayer and a packet data convergence protocol sublayer ( PDCP) 514, which are terminated in the eNB on the network side. The UE may have several upper layers above the L2 508 layer, including a network layer (for example, IP layer) (not shown) that terminates at the gateway.
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21/54 PDN communication 118 on the network side and an application layer 520 that terminates at the other end of the connection (e.g., far end UE, server, etc.). In an exemplary embodiment, application layer 520 can request communication resources from physical layer 506 (layer Ll), shown using a dotted line 522, and can receive resource grants from physical layer 506 (layer Ll), shown using a dotted line 524. Although, for clarity purposes, such feature requests are conceptually indicated by dotted lines 522 and 524 between layer Ll and layer L3, one skilled in the art understands that signals underlying such resource request and resource grant can reach physical layer 506 through the intervening L2 layer.
[0050] The PDCP 514 sublayer provides multiplexing between different radio carriers and logical channels. The PDCP 514 sublayer also provides header compression for upper layer data packets to reduce radio transmission overhead, security through data packet encryption and automatic switching support for UEs between eNBs. The RLC 512 sublayer provides segmentation and reassembly of upper layer data packets, retransmission of lost data packets and reordering of data packets to compensate for out-of-order receipt due to the hybrid automatic retry (HARQ) request. The MAC 510 sublayer provides multiplexing between logical and transport channels. The MAC 510 sublayer is also responsible for allocating the various radio resources (for example, resource blocks)
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22/54 in a cell between the UEs. The MAC 510 sublayer is also responsible for HARQ operations.
[0051] In the control plane, the radio protocol architecture for the UE and eNB is substantially the same for the physical layer 506 and for the L2 layer 508, with the exception that there is no header compression function for the plan of control. The control plan also includes a 516 radio resource control (RRC) sublayer at Layer 3 (layer L3). The RRC 516 sublayer is responsible for obtaining radio resources (for example, radio bearers) and for configuring the lower layers using RRC signaling between the eNB and the UE.
[0052] Figure 6 is a block diagram of an eNB 610 in communication with an UE 650 in an access network according to several aspects of the present disclosure. In the DL, the upper layer packets of the core network are delivered to a 675 controller / processor. The 675 controller / processor implements the L2 layer functionality. In the DL, the 675 controller / processor provides header compression, encryption, reordering and packet segmentation, multiplexing between logical and transport channels and packet segment allocations to the UE 650 based on various priority metrics. The 675 controller / processor is also responsible for HARQ operations, retransmission of lost packets and signaling to the UE 650.
[0053] The transmission processor (TX) 616 implements several signal processing functions for the LI layer (that is, the physical layer). Signal processing functions include encoding and collating
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23/54 to facilitate routing error correction (FEC) in UE 650 and mapping to signal constellations based on various modulation schemes (for example, phase shift binary switching (BPSK), phase shift switching) quadrature (QPSK), M-phase shift switching (M-PSK), M-quadrature amplitude modulation (M-QAM)). The coded and modulated symbols are then divided into parallel streams. Each flow is then mapped to an OFDM subcarrier, multiplexed with a reference signal (for example, pilot) in the time and / or frequency domain, and then combined together with the use of a Inverse Rapid Fourier (IFFT) to produce a physical channel that carries a time domain OFDM symbol stream. The OFDM stream is spatially precoded to produce multiple spatial streams. Channel estimates from a 674 channel estimator can be used to determine the modulation and coding scheme, as well as for spatial processing. The channel estimate can be derived from a channel condition feedback and / or reference signal transmitted by the UE 650. Each spatial flow can then be supplied to a different antenna 620 via a separate 618TX transmitter. Each 618TX transmitter can modulate an RE carrier with a respective spatial flow for transmission.
[0054] On the UE 650, each 654RX receiver receives a signal through its respective antenna 652. Each 654RX receiver retrieves modulated information on an RE carrier and provides the information to the receiving (RX) 656 processor. The RX 656 processor deploys several functions
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24/54 Layer signal processing. The RX 656 processor can perform spatial processing on the information to retrieve any spatial streams destined for the UE 650. If multiple spatial streams are destined for the UE 650, they can be combined by the RX 656 processor into a single symbol stream. OFDM. The RX 656 processor then converts the OFDM symbol stream from the time domain to the frequency domain using a Fast Fourier Transform (FFT). The frequency domain signal comprises a separate OFDM symbol stream for each sub-carrier of the OFDM signal. The symbols on each subcarrier and the reference signal are retrieved and demodulated by determining the most likely signal constellation points transmitted by eNB 610. These smooth decisions can be based on the channel estimates computed by the channel estimator 658. Decisions The soft signals are then decoded and deinterleaved to retrieve the data and control signals that were originally transmitted by the eNB 610 on the physical channel. The data and control signals are then provided to the 659 controller / processor.
[0055] The controller / processor 659 deploys the L2 layer. The controller / processor can be associated with a 660 memory that stores data and program codes. The 660 memory can be termed as a computer-readable medium. At UL, the 659 controller / processor provides demultiplexing between logical and transport channels, packet reassembly, decryption, header decompression, control signal processing for
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25/54 recover top layer packets from the core network. The upper layer packets are then delivered to a 662 data collector, which represents all protocol layers above the L2 layer. Various control signals can also be provided for data collector 662 for L3 processing. The controller / processor 659 is also responsible for error detection with the use of an acknowledgment (ACK) and / or negative acknowledgment (NACK) protocol to support HARQ operations.
[0056] In an exemplary mode, the 659 controller / processor can be coupled to the 670 resource selection logic. The 670 resource selection logic can include one or more software, hardware, firmware, logic or other components that can be configured to evaluate, process, assign, select, reselect or otherwise allow the UE 650 to determine the availability of and select which
broadcast resources information. [0057] No UL, a source of Dice 667 is used for provide packages layer higher for O 659 controller / processor. source in Dice 667
represents all protocol layers above the L2 layer. Similar to the functionality described in conjunction with the DL transmission by eNB 610, the 659 controller / processor deploys the L2 layer for the user plane and the control plane by providing header compression, encryption, reordering and segmentation of packet and multiplexing between logical and transport channels based on packet segment allocations via eNB 610. The
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26/54 controller / processor 659 is also responsible for HARQ operations, retransmission of lost packets and signaling to eNB 610.
[0058] Channel estimates derived by a 658 channel estimator from a reference or feedback signal transmitted by eNB 610 can be used by the TX 668 processor to select the appropriate modulation and coding schemes and to facilitate processing space. The spatial streams generated by the TX 668 processor can be provided for different antenna 652 by means of separate transmitters 654TX. Each 654TX transmitter can modulate one
bearer of RE with one respective flow space for streaming.
[0059] UL transmission is processed in eNB
610 in a manner similar to that described in conjunction with the receiver function on the UE 650. Each 618RX receiver receives a signal through its respective antenna 620. Each
618RX receiver retrieves modulated information in an with RE and provides the information for one RX 670 processor. 0 RX processor 670 can deploy the LI layer.
[0060] The 675 controller / processor deploys the L2 layer. The controller / processor 675 can be associated with a memory 676 that stores data and program codes. The 676 memory can be termed as a computer-readable medium. At UL, the 675 controller / processor provides demultiplexing between logical and transport channels, packet reassembly, decryption, header decompression, signal processing
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27/54 control to retrieve top layer packets from UE 650. The top layer packets from the 675 controller / processor can be delivered to the core network. The 675 controller / processor is also responsible for error detection using an ACK and / or NACK protocol to support HARQ operations.
[0061] Figure 7 is a diagram of a device-to-device (D2D) 700 communications system, according to various aspects of the present disclosure. The device to device communications system 700 can be deployed over the network shown in Figure 1, and, in an exemplary embodiment, includes a plurality of wireless devices 704, 706, 708, 710. The device to device communications system 700 it can overlap with a cellular communications system (as shown and described in Figure 1 and Figure 2), such as, for example, a wireless wide area network (WW AN). Some wireless devices 704, 706, 708, 710 can communicate together in device-to-device (or peer-to-peer) communication using the DL / UL WW AN spectrum, some can communicate with the station base 702 and some can do both. For example, as shown in Figure 7, wireless devices 708, 710 are in device to device communication and wireless devices 704, 706 are in device to device communication. Wireless devices 704, 706 also communicate with base station 702.
[0062] In one configuration, some or all of the UEs 704, 706, 708, 710 can be equipped or located in the vehicles. In such a configuration, the
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28/54 D2D 700 communications can also be referred to as a vehicle to vehicle communications system (V2V) and when integrated with a cellular communication system, it can be mentioned as a CV2X communication system.
[0063] The exemplifying methods and devices discussed above are applicable to any of a variety of wireless device-to-device communication systems, such as a FlashLinQ, WiMedia-based device-to-device communication system. , Bluetooth, ZigBee or Wi-Fi based on the IEEE 802.11 standard. To simplify the discussion, the exemplifying methods and apparatus are discussed within the context of LTE. In addition, an element of common skill in the art would understand that exemplifying methods and devices are applicable more generally to a variety of other communication systems from device to wireless device or communication networks such as 5G and beyond.
[0064] Figure 8 is a diagram illustrating a data structure 800 according to various aspects of the present disclosure. The horizontal geometric axis shows time increasing to the right and the vertical geometric axis shows frequency increasing upwards. In an exemplary embodiment, data structure 800 can comprise various radio frequency and time resources that can be used for direct vehicle to vehicle (V2V) communication. These features are, in general, referred to as side link features and are used to communicate on a side link channel so that a vehicle can communicate directly with another vehicle.
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29/54 or object.
[0065] Data structure 800 can comprise some or all of a side link communication and can also be referred to as a communication frame. In an exemplary embodiment, data structure 800 comprises a first subframe, subframe i and a second subframe, subframe i + 1. In an exemplary embodiment, the first subframe, subframe i, may comprise an 802 transmission from a first exemplary vehicle, and an 812 transmission from a second exemplary vehicle. In an exemplifying embodiment, the 802 transmission comprises a side link control (PSCCH) physical channel communication 803 and a side link shared physical channel (PSSCH) communication (data channel) 806. In an exemplary embodiment, the transmission 1002 comprises a control channel that has control information (PSCCH 1003) that indicates the resource blocks, modulation / encoding scheme, etc., used by the PSSCH 806 data channel transmission.
[0066] Similarly, in an exemplary mode, transmission 812 comprises a side link control physical channel (PSCCH) communication 1013 and a side link shared physical channel (PSSCH) communication (data) 816. In one For example, transmission 812 comprises a control channel that has control information (PSCCH 1013) that indicates the resource blocks, modulation / encoding scheme, etc., used for the transmission of data from PSSCH 816.
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30/54 [0067] In an exemplifying mode, ο second subframe, subframe i + 1, can comprise an 822 transmission from a third example vehicle. In an exemplary mode, transmission 822 comprises a side link control physical channel (PSCCH) communication 823 and a side link shared physical channel (PSSCH) communication (data channel) 826. In an example example, transmission 822 comprises a control channel that has control information (PSCCH 823) that indicates the resource blocks, modulation / encoding scheme, etc., used by the PSSCH 826 data channel transmission.
[0068] Figure 9 is a diagram illustrating a data structure 900 according to various aspects of the present disclosure. Data structure 900 includes an exemplary description of candidate resource selection and reselection. Exemplifying features include exemplary PSCCH control channels and PSSCH data channels; however, other resources can also be used. The horizontal geometric axis shows time increasing to the right and the vertical geometric axis shows frequency increasing upwards.
[0069] A time 901 refers to a trigger time for the selection or reselection of the resource in which a packet reaches an application layer of UEs in question in subframe n for transmission.
[0070] An autonomous resource selection and reselection procedure for LTE and CV2X communication is defined, which is largely based on the following steps.
[0071] 1. Detect continuously (for example,
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31/54 continuously monitor occupied and unoccupied resources and the received energy associated with monitored resources) the set of time and frequency resources over a period of time (for example, over a period of 1 second or another period of time configurable). The monitoring of occupied and unoccupied resources and the received energy associated with the monitored resources can be continuous, can be continuous during the example time period, can be discontinuous or can be selectable or adjustable, based on various configuration parameters.
[0072] 2. When a packet reaches subframe n, a UE determines a set of candidate resources to choose the transmission of the packet within a time window, or time interval, of [n + Ti, η + Ϊ2] , where n refers to subframe n in Figure 9. The time Ti is chosen to allow a UE processing delay with Ti <4 subframes. The T2 time is chosen to meet a latency objective for the intended, or subsequent, transmission of that packet and, in an exemplary mode, it can be 20 <T ₂ ú 100 subframes, as an example. As used herein, the term intended refers to a UE that receives a packet for transmission (for example, in subframe n), selects the appropriate resource as described in this document for the transmission of that packet and subsequently transmits that packet. In an exemplary modality, the desired communication latency parameter can comprise the maximum desired latency for the transmission of the packet that has the information of
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32/54 communication. The resources identified with 910 refer to a set of single candidate subframe resources within the [n + Ti, n + T ₂ ] window that meet the desired UE latency objective.
[0073] A single candidate (R) subframe resource for PSSCH transmission R _x , _y is defined as a set of L contiguous _subCH subchannels with subchannel x + j in the subframe @@@@ equation, where j = 0 ,. .., L _sub cH ^_ l · The UE assumes that any set of contiguous subchannels L _subC H included in the pool of corresponding PSSCH resources within the time interval [η + Τι, n + T ₂ ] corresponds to a subframe resource single candidate, where the selections of Ti and T ₂ are determined by the implantation of UE under the general restriction of T ₂ <4 and 20 <T ₂ <100, in this example. The selection of T ₂ UEs preferably satisfies the UE latency objective. The total number of candidate single subframe resources is denoted by M _to tai · The union of all candidate single subframe resources is denoted as set _{A A.} The set S can be generated by the controller / processor 659 and saved in the memory 660 of Figure 6.
[0074] The resources that are adjacent in frequency can be mentioned as being in contiguous subchannels, with a subchannel referring to a frequency range. For example, resources 922 and 926 are considered to be located in contiguous subchannels, where each resource (922 and 926 in this example), comprises a frequency range.
[0075] 3. The UE then determines a subset S _B of resources within the window [n + T ₂ , n + T ₂ ] (that is, a
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33/54 subset of S _B of the set _{A A} ) that the UE determines not to be reserved for transmissions by other UEs in the vicinity of the UE in question. To determine the set of S _B resources, the UE in question excludes from the set S _A any occupied resource, and any resource in which a collision of another UE transmission is expected based on the decoded control information from its transmissions. previous reports indicating future resource reserves by that UE. Resources are excluded if a collision is expected, and if the received reference signal strength (RSRP) of the received transmission exceeds a threshold, where the threshold depends on the relative priority of the transmission by the other UE and the priority of the intended transmission of the transmission itself. UEs concerned. Additionally, the UE in question is expected to exclude any resource that it has not been able to monitor in the past to avoid any potential collisions. The set S _B can be generated by the controller / processor 659 and saved in memory 660 of Figure 6.
[007 6] As an example using Figure 9, the UE in question can determine to exclude resources 924, 932, 936 and 938 within resource pool 910 based on transmissions received from other UEs in the vicinity of UEs in question. For example, the UE in question can determine the resources occupied within the candidate resource pool based on received control information that indicates resource reservation information. In an exemplary modality, a minimum and maximum limit in the T ₂ time window may be a function of a level of use based on the energy of the remaining candidate resources.
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34/54 from the candidate resource pool after excluding occupied resources.
[0077] After the resource exclusions, the EU then ranks the remaining resources within a set (S) based on the received power measurements (RSSI (signal strength indicator received)) on average over the period detection. The UE then forms the set S _B by choosing the lowest energy resources from the set S _A until the number of resources within the set S _B becomes greater than or equal to 0.2 M _to taiz in this example . Other M _to tai multipliers are possible. As an example using Figure 9, the UE can determine resources 922, 926, 928, 930, 934, 940, 942, 944 and 946 (shown in bold) to have the lowest measured RSSI energy within the pool of candidate resources 910 after the exclusion of resources 924, 932, 936 and 938. In this way, resources 922, 926, 928, 930, 934, 940, 942, 944 and 946 are determined to be the set of candidate resources (resources lowest energy) available for resource selection and / or reselection (ie, set S _B ) for the transmission of the desired packet.
[0078] 4. The UE in question then chooses a low energy resource from the set S _B. For example, the UE in question can choose resources 930 for the transmission of the communication within the time period T ₂ . The 930 resource can be considered a low energy resource, which has a lower received energy than other resources in the S _B set or that is not necessarily the lowest energy in the S _B set, but low enough for the transmission of the packet.
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35/54 communication within the T ₂ time period. In an exemplary mode, the 930 resource can have a low received energy and can be considered a low latency resource. In an exemplary embodiment, the selection of the low energy resource, such as the 930 resource, from the lowest energy resource set as the transmission resource leads to the lowest transmission latency for the package in question.
[0079] To further describe step 2 above, in the window of [n + T ₂ , n + T ₂ ], the choice of T ₂ and T ₂ can be determined, at least in part, by the implantation of UE within certain restrictions. The T ₂ time is related to the desired latency and, in an exemplary mode, the best worst case latency is in the order of about 20 ms. In other words, if the UE wants a latency <= 10 ms, then this latency may not be guaranteed as just latencies <= T ₂ , that is, not less than 20 ms, it can be guaranteed in this example, where T ₂ > = 20 ms.
[0080] To support CV2X, V2X, low latency V2V and other communications, a latency below 20 ms, that is, a T ₂ of less than 20 ms, is desired. One way to achieve low latency is to allow 20> T ₂ > = 4 (for example) and leave the choice of T ₂ for UE deployment. However, this approach can present a problem at the system level in congested scenarios. In congested scenarios, a low latency objective triggers the UE in question to define a resource selection or reselection window that is small (T ₂ is small, for example, 10 ms) and as such, the UE in question may not have ability to locate any suitable resource (ie
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36/54 is, a resource that is not being used by another UE and that has low received energy). Therefore, the best feature set in the small 10 ms window in this example may not be very good (from a system point of view) and the use of one of these features is likely to cause a collision with other UE transmissions in that feature and degrade system performance. Therefore, it is desirable to balance low latency desirability with system performance, particularly in congested scenarios.
[0081] Regarding the reduction of latency (reduction of T2), the minimum value of T2 can be reduced to support the reduction of latency in the physical layer (Layer 1). The configuration and preconfiguration of UE can be based on the selection of a minimum value of T2 that is supported. The minimum value of T2 can be selected from a set of values. The value set can include at least 20 ms, and a value less than 20 ms.
[0082] In a first exemplary modality to optimize (minimize) T2, the minimum value of T2 allowed to be used by the UE in question can be derived according to the channel occupied ratio (CBR) measured in the UE in question at the time of selection and reselection of appeal. In an exemplary embodiment, the function of CBR measurement in the UE in question at the time of selection or reselection of the resource may be based on at least one of the preconfigurations within the UE in question or dynamic configuration via a configuration message received from a base station.
[0083] In an exemplary modality, the
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37/54 function of the CBR measured in the UE in question at the time of selection or reselection of resource may be dependent on the priority of the package, for example, priority by proximity service package (ProSe) (PPPP), or other prioritization criteria of package. For example, the time window T ₂ can be minimized based on packet priority information that is indicative of a desired subsequent transmission priority.
[0084] In an exemplary mode, the function of the CBR measured in the UE in question at the time of selection or reselection of the resource may depend on the pool of transmission resources that is used for the transmission.
[0085] In an exemplary mode, the upper limit in T ₂ can also be a function of CBR (thus the min. And / or maximum limit of T ₂ in function of CBR can be configured).
[0086] In an exemplary mode, the channel occupied ratio (CBR) is a measurement of the congestion level of the channel measured by the UE in question. The UE can adapt its transmission parameters according to the CBR measured before each UE transmission. The set of transmission parameters to be adapted and the range (min and max values as applicable) can be configured using a preconfiguration message / RRC (radio resource control) and can be in the form of a lookup table 1100 as shown in Figure 11.
[0087] According to an exemplary modality, the lookup table 1100 in Figure 11 shows an example of the CBR as it has a value between the minimum and maximum of the CBR range configuration that
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38/54 corresponds to 1102, and the radio parameters selected in 1104 that the UE should use for its transmission, and where the radio parameter set includes the additional parameter setting 1106 that corresponds to the minimum value for parameter T2.
[0088] The example lookup table in Figure 11 can be (pre) configured independently for different transmission priority (PPPP). As a
configuration of example: [0089] PPPP- 1 (high packet priority) [0090] 0 <CBR <0.5 T2min = 10 [0091] 0.5 <CBR <1 T2min = 12 [0092] PPPP_2 (low packet priority) [0093] 0 <CBR <0.3 T2min = 10 [0094] 0.3 <CBR <0.5 T2min = 12 [0095] 0.5 <CBR <1 T2min = 20 [0096] In this example, as the congestion increases, the minimum value of T ₂ is also
configured to increase to reach an agreement between performance (that is, achieved by defining a longer time window) and latency (that is, achieved by defining a shorter time window to achieve a latency performance goal ). If a desired transmission is for a high priority packet, then T ₂ is increased only marginally as CBR increases to ensure that high priority packets are transmitted with lower latency (as high priority is also indicative of the latency goal). If the intended transmission is for
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39/54 low priority package, then the minimum allowable T ₂ value is increased as the CBR increases to provide the compromise between performance and latency.
[0097] Another example configuration can define the minimum value of T ₂ to depend only on the priority (PPPP) of the transmission and independent of the measured CBR (for example, the value can be configured as the same for CBR ranges, or a table search value of T ₂ (min / max) for separate PPPP can be configured or preconfigured).
[0098] In a second exemplary mode of optimizing (minimizing) T ₂ , a UE in question can start with a low value of T ₂ , for example, 10 ms, and then autonomously increase the time T ₂ if the even if it cannot locate a number of resources (for example, [X]% of resources) with received energy less than a configured or preconfigured threshold, within time T ₂ . Differently, if the size of the lower energy resource set is less than a configured threshold (X%) of the size of the candidate resources, then the UE will autonomously increase the time T ₂ . For example, the time T ₂ can be increased in steps (for example, in steps of 1 subframe period at a time) until the set of candidate resources with energy less than the threshold is greater than or equal to [X]%. Starting with a minimum time window, the UE in question can then increase the time window if the set of resources that has energy less than a threshold is less than a configured threshold (X%).
[0099] In this example mode, the UE in question can choose T ₂ <= a limit, where the limit is
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40/54 specified in the specification or configured (or pre-configured) as an RRC parameter. The UE in question can choose a desired T ₂ within the limit to achieve its latency goal. In the resource selection or reselection stage; however, if the UE in question cannot identify more than [X]% of candidate resources that have energy below a threshold, then the UE in question determines that it does not have a good set of candidate resources and can degrade performance system beyond a tolerable level. In this example, the UE in question, therefore
form, sacrifice the latency in favor performance in system and increases the time T ₂ up until that the candidate set of resources is bigger then [X]% from the original set in
resources (for example, X = 20%).
[00100] In a third exemplary mode of optimizing (minimizing) T ₂ , a UE in question chooses the lowest latency resource among the lowest energy resource set.
[00101] In a fourth example modifying to optimize (minimize) T ₂ , in a variant of the first example modifying to optimize T ₂ , the min. (and / or max.) at T ₂ are, instead, a function of a new measurement that can be referred to as a level of usage based on the UE that detects the energy of remaining candidate resources from the detection results after the exclusion of resources expected to be occupied (for example, based on the decoding of the control channel which indicates that these resources will be occupied by another transmission of UEs).
[00102] In an exemplary modality, the
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41/54 data corresponding to a plurality of information packets with a plurality of different priorities can be transmitted on the selected low energy resource over time; and the time window, T ₂ , can be minimized based on a higher packet priority among the plurality of different priorities anticipated to be transmitted using the low energy resource selected over time.
[00103] In an exemplary embodiment, data that corresponds to a plurality of information packages with a plurality of different priorities can be transmitted on the selected low energy resource over time, and the time window T ₂ can be minimized with based on an average packet priority among the plurality of different priorities anticipated to be transmitted using the selected low energy resource over time.
[00104] Figure 10 is a call flow chart that illustrates an exemplary embodiment of the present disclosure.
[00105] An application layer of UEs is shown at 1002, an RRC sublayer of UEs is shown at 1004 and a physical layer of UEs is shown at 1006.
[00106] In block 1010, application layer 1002 continuously monitors occupied and unoccupied frequency and time resources over a period of time. The time period can be configurable and, in an example mode, it can be 1 second.
[00107] In block 1012, a packet reaches application layer 1002 in subframe n for transmission.
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42/54 [00108] In call 1016, application layer 1002 calls the RRC sublayer to determine available resources.
[00109] In call 1018, the RRC sublayer 1004 calls physical layer 1006 to determine available resources.
[00110] In call 1022, physical layer 1006 informs RRC 1004 sublayer about available resources. These resources can be the candidate resources for selecting or reselecting the resource described in Figure 9.
[00111] In call 1024, the RRC sublayer 1004 informs the application layer 1002 about the available resources.
[00112] In block 1028, application layer 1002 determines the resources to use within the time window [n + Ti, n + 'l2] described above.
[00113] In block 1032, application layer 1002 classifies the available resources based on S-RSSI, or other criteria.
[00114] In block 1034, application layer 1002 chooses resources. For example, application layer 1002 can choose resources from the lower 20% of S-RSSI, as described above.
[00115] In call 1036, application layer 1002 calls the RRC 1004 sublayer to select the chosen features.
[00116] In call 1038, the RRC sublayer calls the physical layer 1006 to select the chosen resources.
[00117] In call 1042, the physical layer 1006
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43/54 calls the RRC 1004 sublayer to grant the resource request.
[00118] In call 1044, the RRC sublayer 1004 informs application layer 1002 about the resource grant.
[00119] In call 1046, application layer 1002 calls the sublayer RRC 1004 to transmit the packet using the selected resource.
[00120] In call 1048, the RRC sublayer calls the physical layer 1006 to transmit the packet on the selected resource.
[00121] Figure 12 is a flow chart 1200 that illustrates an example of a method for communication, according to several aspects of the present disclosure. The blocks in method 1200 can be made in or out of the order shown. One or more of the blocks in the 1200 method can be carried out in parallel with one or more other blocks in the 1200 method.
[00122] In block 1202, a UE in question continuously monitors resources for transmission of data packets.
[00123] In block 1204, a packet arrives for transmission to subframe n.
[00124] In block 1206, the UE in question determines available resources within the time window [n + Ti, n + T ₂ ]. [00125] In block 1208, the UE classifies the available resources.
[00126] In block 1210, the UE chooses resources from the best available candidate resources.
[00127] In block 1212, the UE selects the resources
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44/54 chosen.
[00128] In block 1214, the UE transmits the packet using the selected resource.
[00129] Figure 13 is a functional block diagram of a 1300 device for a communication system according to an exemplary embodiment of the disclosure. Apparatus 1300 comprises means 1302 for continuously monitoring resources. In certain embodiments, the means 1302 for continuously monitoring resources can be configured to perform one or more of the functions described in operating block 1202 of method 1200 (Figure 12). In an exemplary embodiment, the means 1302 for continuously monitoring resources can comprise the UE 650 (Figure 6) which monitors transmission resources available using, for example, the controller / processor 659, processor RX 656, and the logic of selection of resource 670 in Figure 6.
[00130] Apparatus 1300 further comprises means 1304 for determining that a packet arrives for transmission in subframe n. In certain embodiments, the means 1304 for determining that a packet arrives for transmission in the subframe cannot be configured to perform one or more of the functions described in operating block 1204 of method 1200 (Figure 12). In an exemplary embodiment, the means 1304 for determining that a packet arrives for transmission in the subframe cannot comprise the UE 650 (Figure 6) which determines that a communication packet must be transmitted using, for example, the controller / processor 659, data source 667 and resource selection logic 670 in Figure 6.
[00131] The 1300 device additionally comprises
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45/54 means 1306 to determine resources available within a time window. In certain embodiments, the means 1306 for determining resources available within a time window can be configured to perform one or more of the functions described in operating block 1206 of method 1200 (Figure 12). In an exemplary embodiment, the means 1306 for determining available resources within a time window can comprise the UE 650 (Figure 6) which determines transmission resources available during a time window [n + Ti, η + Ϊ2], as described above, with the use, for
example, controller / processor 659, of processor RX 656, ofresource TX 668 processor and logic 670 in Figure 6.[00132] The apparatus 1300 comprises selectionadditionally 1308 to classify available resources. In
In certain embodiments, the means 1308 for classifying the available resources can be configured to perform one or more of the functions described in operating block 1208 of method 1200 (Figure 12). In an exemplary modality, the means 1308 for classifying the available resources can comprise the UE 650 (Figure 6) which classifies the available transmission resources based on the received energy measurements (S-RSSI (received signal strength indicator)) in average over the detection period, as described above, using, for example, the 659 controller / processor and the 670 resource selection logic in Figure 6.
[00133] The device 1300 additionally comprises means 1310 for choosing resources from the best candidate resources. In certain embodiments, the medium 1310
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46/54 to choose the resources from the best candidate resources can be configured to perform one or more of the functions described in operating block 1210 of method 1200 (Figure 12). In an exemplary mode, the means 1310 for choosing resources from the best candidate resources can comprise the UE 650 (Figure 6) which chooses low latency resources from the S _B set, as described above, using, for example, controller / processor 659 and 670 resource selection logic in Figure 6.
[00134] The device 1300 additionally comprises means 1312 for selecting the resource. In certain embodiments, the means 1312 for selecting the resource can be configured to perform one or more of the functions described in operating block 1212 of method 1200 (Figure 12). In an exemplary mode, the means 1312 for selecting the resource can comprise the UE 650 (Figure 6) which selects the resource for transmission, as described above, using, for example, the controller / processor 659 and the selection logic resource 670 in Figure 6.
[00135] The device 1300 additionally comprises the means 1314 for transmitting the packet using the selected resource. In certain embodiments, the means 1314 for transmitting the packet using the selected resource can be configured to perform one or more of the functions described in operating block 1214 of method 1200 (Figure 12). In an exemplary embodiment, the means 1314 for transmitting the packet using the selected resource can comprise the UE 650 (Figure 6) which transmits the packet using the selected resource, as described above, with
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47/54 the use, for example, of the controller / processor 659, processor TX 668, the transmitter 654TX and the resource selection logic 670 of Figure 6.
[00136] The techniques described in this document can be used for several wireless communication systems such as CDMA, TDMA, FDMA, OFDMA, SC-FDMA and other systems. The terms system and network are often used interchangeably. A CDMA system can deploy radio technology such as CDMA2000, Universal Terrestrial Radio Access (UTRA), etc. CDMA2000 covers the IS-2000, IS-95 and IS-856 standards. IS-2000 Versions 0 and A are commonly referred to as CDMA2000 Ix, lx, etc. IS-856 (TIA-856) is commonly referred to as CDMA2000 IxEV-DO, High Rate Packet Data (HRPD), etc. UTRA includes Broadband CDMA (WCDMA) and other CDMA variants. The TDMA system can deploy radio technology like the Global System for Mobile Communications (GSM). An OFDMA system can deploy radio technology such as Ultra-Mobile Broadband (UMB), Evolved UTRA (E-UTRA), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash-OFDM ™, etc. UTRA and E-UTRA are part of the Universal Mobile Telecommunication System (UMTS). The Long Term Evolution (LTE) of 3GPP and LTE-Advanced (LTE-A) are new versions of UMTS that use E-UTRA. UTRA, E-UTRA, UMTS, LTE, LTE-A and GSM are described in documents from an organization called the Third Generation Partnership Project (3GPP). CDMA2000 and UMB are described in the documents of an organization called the Third Generation Partnership Project 2 (3GPP2). The techniques described in this document can be used for systems and
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48/54 radio technologies mentioned above as well as other radio systems and technologies, including cellular communications (for example, LTE) over unlicensed and / or shared bandwidth. The above description, however, describes an LTE / LTE-A system for example purposes, and LTE terminology is used in much of the above description, although the techniques are applicable in addition to LTE / LTE-A applications.
[00137] The detailed description presented above together with the accompanying drawings describes examples and does not represent the only examples that can be implemented or that are within the scope of the claims. The terms example and example, when used in this description, mean that it serves as an example, case or illustration, and not preferential or advantageous over the other examples. The detailed description includes specific details for the purpose of providing an understanding of the techniques described. These techniques, however, can be practiced without these specific details. In some cases, well-known structures and devices are shown in the form of a block diagram to avoid hiding the concepts of the examples described.
[00138] Information and signals can be represented using any one of a variety of different technologies and techniques. For example, data, instructions, commands, information, signals, bits, symbols and integrated circuits that can be mentioned throughout the above description can be represented by voltages, currents, electromagnetic waves, particles or magnetic fields,
Petition 870190094846, of 09/23/2019, p. 54/86
49/54 particles or optical fields or any combination thereof.
[00139] The various blocks and illustrative components described in conjunction with the disclosure in this document can be deployed or performed with a general purpose processor, digital signal processor (DSP), ASIC, FPGA or other programmable logic device, transistor or discrete gate logic, discrete hardware components or any combination thereof designed to perform the functions described in this document. A general purpose processor can be a microprocessor, however, alternatively the processor can be any conventional processor, controller, microcontroller or state machine. A processor can also be deployed as a combination of computing devices, for example, a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors together with a DSP core or any other such configuration.
[00140]
The functions described in this document can be implemented in hardware, software executed by a processor, firmware or any combination thereof. If deployed in software run by a processor, the functions can be stored in or transmitted as one or more instructions or code on computer-readable media. Other examples and deployments are covered by the scope and spirit of the disclosure and claims attached. For example, due to the nature of software, the functions
Petition 870190094846, of 09/23/2019, p. 55/86
50/54 described above can be deployed using software executed by a processor, hardware, firmware, wired connection or combinations of any of them. Role deployment features can also be physically located in various positions, including being distributed so that portions of roles are deployed in different physical locations. As used herein, including in the claims, the term and / or, when used in a list of two or more items, means that any one of the items listed can be used by itself, or any combination of two or more among the items listed can be employed. For example, if a composition is described as containing components A, B and / or C, the composition can contain A alone; B alone; C alone; A and B in combination; A and C in combination; B and C in combination; or A, B and C in combination. In addition, as used in this document, including in the claims, or as used in an item list (for example, a list of items preceded by a sentence such as at least one among or one or more among), indicates a disjunctive list, of so that, for example, a list of at least one of A, B or C means A or B or C or AB or AC or BC or ABC (i.e., A and B and C).
[00141] Computer-readable media includes both computer storage media and communication media that include any media that facilitates the transfer of a computer program from one place to another. A storage medium can be any available medium that can be accessed by a general purpose or a specific purpose computer. As a
Petition 870190094846, of 09/23/2019, p. 56/86
51/54 example, and not limiting, computer-readable media may comprise RAM, ROM, EEPROM, flash memory, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices or any other media which can be used to load or store a desired program code medium in the form of instructions or data structures and which can be accessed by a general purpose or specific purpose computer or a general purpose or specific purpose processor. In addition, any connection is properly called a computer-readable medium. For example, if the software is transmitted from a website, server or other remote source using a coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL) or wireless technologies such as infrared , radio and microwave, then coaxial cable, fiber optic cable, twisted pair, DSL or wireless technologies such as infrared, radio and microwave are included in the media definition. The magnetic disk and the optical disk, as used in this document, include compact disk (CD), laser disk, optical disk, digital versatile disk (DVD), floppy disk and Blu-ray disk, in which the magnetic disks normally reproduce the data magnetically, while optical discs reproduce data optically with lasers. The combinations of the above are also included in the scope of computer-readable media.
[00142] As used in this description, the terms component, database, module, system and the like are intended to refer to an entity
Petition 870190094846, of 09/23/2019, p. 57/86
52/54 related to computer, hardware, firmware, a combination of hardware and software, software, or running software. As an example, a component can be, but is not limited to, a process executed on a processor, a processor, an object, an executable, an execution thread, executable instructions by computer, a program and / or a computer. By way of illustration, both an application running on a computing device and the computing device can be a component. One or more components can reside within a process and / or execution thread, and a component can be located on a computer and / or distributed between two or more computers. In addition, these components can run from a variety of computer-readable media that have multiple data structures stored in them. Components can communicate via local and / or remote processes as per a signal that has one or more data packets (for example, data from a component that interacts with another component on a local system, system distributed and / or over a network such as the Internet with other systems using the signal).
[00143] Although aspects and modalities are described in this application by way of illustration for some examples, those skilled in the art will understand that additional deployments and use cases can arise in many different arrangements and scenarios. The innovations described in this document can be implemented through many types of platform, devices, systems, formats, sizes, packaging arrangements.
Petition 870190094846, of 09/23/2019, p. 58/86
53/54
For example, modalities and / or uses may arise through integrated chip modalities and other devices based on non-module components (for example, end-user devices, vehicles, communication devices, computing devices, industrial equipment, buy / sell devices, medical devices, AI-enabled devices, etc.). Although some examples may or may not be specifically directed to use cases or applications, a wide variety of applicability of the described innovations can occur. Deployments can vary in a spectrum from chip-level or modular components to non-modular, non-modular level deployments and in addition to OEM, distributed or aggregated systems or devices that incorporate one or more aspects of the described innovations. In some practical configurations, devices that incorporate the aspects and features described may also necessarily include additional components and resources for implementing and practicing the claimed and described modalities. For example, the transmission and reception of wireless signals necessarily includes several components for analog and digital purposes (for example, hardware components including antenna, RE chains, power amplifiers, modulators, temporary memory, processor (or processors), interleaver , adder / adder, etc.). It is intended that the innovations described in this document can be practiced on a wide variety of devices, chip-level components, systems, distributed arrangements, end-user devices,
Petition 870190094846, of 09/23/2019, p. 59/86
54/54 etc. of varying sizes, shapes and constitution.
[00144] The previous description of the disclosure is provided to enable anyone skilled in the art to produce or use the disclosure. Various modifications to the disclosure will become readily apparent to those skilled in the art and the generic principles defined in this document can be applied to other variations without departing from the scope of the disclosure. Accordingly, the disclosure is not intended to be limited to the examples and designs described in this document, but must be compatible with the broadest scope consistent with the principles and innovative features disclosed in this document.

权利要求:
Claims (29)
[1]
1. Communication method that comprises:
monitor communication resources in a communication system;
determine a set of candidate resources to use for the subsequent transmission of information within a time window so that the time window is minimized based on a desired communication latency parameter that considers at least one or more among channel congestion communication and a priority of the intended transmission;
determine a set of resources of energy lower from the set of candidate resources; select a resource low energy from the set of energy resources lower; and to transmit data in
low power feature selected.
[2]
A method according to claim 1, which further comprises minimizing the time window based on a busy channel ratio measurement that is indicative of communication channel congestion.
[3]
A method according to claim 1, which further comprises minimizing the time window based on packet priority information that is indicative of subsequent transmission priority.
[4]
A method according to claim 1, which further comprises:
transmitting data that corresponds to a plurality of information packets with a plurality of different priorities in the selected low energy resource over time; and
Petition 870190094846, of 09/23/2019, p. 61/86
2/9 minimize the time window based on a higher packet priority among the plurality of different priorities anticipated to be transmitted using the selected low energy resource over time.
[5]
A method according to claim 1, which further comprises:
transmit data corresponding to a plurality of information packets with a plurality of different priorities on the selected low energy resource over time, and minimize the time window based on an average packet priority among the plurality of different anticipated priorities for transmitted using the selected low energy resource over time.
[6]
6. Method according to claim 1, which further comprises starting with a minimum time window and then increasing the time window if the size of the lower energy resource set is less than a configured threshold (X% ) of the size of the candidate resource pool within the time window.
[7]
7. Method according to claim 1, which further comprises selecting the low energy resource from the lowest energy resource set as the resource which leads to the lowest latency.
[8]
A method according to claim 1, which further comprises:
determine occupied resources within the candidate resource pool based on control information
Petition 870190094846, of 09/23/2019, p. 62/86
3/9 received that indicate resource reservation information; and where a minimum and maximum time window limit is a function of a usage level based on the energy of remaining candidate resources from the candidate resource pool after excluding occupied resources.
[9]
9. Communication device comprising:
a user equipment (UE) configured to monitor communication resources in a communication system;
the UE configured to determine a set of candidate resources to use for the subsequent transmission of information within a time window so that the time window is minimized based on a desired communication latency parameter that considers at least one or more between communication channel congestion and a subsequent transmission priority;
the UE configured to determine a lower energy resource pool from the candidate resource pool;
the UE configured to select a low energy resource from the lowest energy resource set; and the UE configured to transmit data on the selected low energy resource.
[10]
Apparatus according to claim 9, wherein the UE is configured to minimize the time window based on a busy channel ratio measurement that is indicative of communication channel congestion.
[11]
11. Apparatus according to claim 9, wherein the UE is configured to minimize the time window with
Petition 870190094846, of 09/23/2019, p. 63/86
4/9 based on packet priority information that is indicative of subsequent transmission priority.
[12]
Apparatus according to claim 9, wherein the UE is configured to:
transmitting data that corresponds to a plurality of information packets with a plurality of different priorities in the selected low energy resource over time; and minimizing the time window based on at least one of a higher packet priority from the plurality of different priorities anticipated to be transmitted using the low energy resource selected over time and an average packet priority from the plurality of different priorities anticipated to be transmitted using the low energy resource selected over time.
[13]
13. Apparatus according to claim 9, wherein the UE is configured to start with a minimum time window and then increase the time window if the size of the lower energy resource set is less than a threshold configured (X%) of the size of the candidate resource set within the time window.
[14]
Apparatus according to claim 9, wherein the UE is configured to select the low energy resource from the lowest energy resource set as the resource that leads to the lowest latency.
[15]
Apparatus according to claim 9, wherein the UE is configured to:
determine occupied resources within the candidate resource pool based on control information
Petition 870190094846, of 09/23/2019, p. 64/86
5/9 received that indicate resource reservation information; and where a minimum and maximum time window limit is a function of a usage level based on the energy of remaining candidate resources from the candidate resource pool after excluding occupied resources.
[16]
16. Device comprising:
means for monitoring communication resources in a communication system;
means to determine a set of candidate resources to use for the subsequent transmission of information within a time window so that the time window is minimized based on a desired communication latency parameter that considers at least one or more of congestion communication channel and a subsequent transmission priority;
means for determining a lower energy resource pool from the candidate resource pool;
means for selecting a low energy resource from the lowest energy resource set; and means for transmitting data on the selected low energy resource.
[17]
A device according to claim 16, further comprising means for minimizing the time window based on a busy channel ratio measurement that is indicative of communication channel congestion.
[18]
18. Device according to claim 16, further comprising means for minimizing the time window based on priority information by
Petition 870190094846, of 09/23/2019, p. 65/86
6/9 packet that are indicative of the priority of the subsequent transmission.
[19]
19. Device according to claim 16, which further comprises:
means for transmitting data corresponding to a plurality of information packets with a plurality of different priorities in the selected low energy resource over time; and means to minimize the time window based on at least one of a higher packet priority among the plurality of different priorities anticipated to be transmitted using the low energy resource selected over time and an average packet priority among the plurality of different priorities anticipated to be transmitted using the selected low energy resource over time.
[20]
20. Device according to claim 16, which further comprises means for starting with a minimum time window and then increasing the time window if the size of the lower energy resource set is less than a configured threshold ( X%) of the size of the candidate resource pool within the time window.
[21]
21. The device of claim 16, further comprising means for selecting the low energy resource from the lowest energy resource set as the resource leading to the lowest latency.
[22]
22. The device of claim 16, further comprising:
means to determine resources occupied within the
Petition 870190094846, of 09/23/2019, p. 66/86
7/9 set of candidate resources based on control information received that indicate resource reservation information; and where a minimum and maximum time window limit is a function of a usage level based on the energy of remaining candidate resources from the candidate resource pool after excluding occupied resources.
[23]
23. Non-transitory computer-readable media that stores computer-executable code for communication, code that is executable by a processor to:
monitor communication resources in a communication system;
determine a set of candidate resources to use for the subsequent transmission of information within a time window so that the time window is minimized based on a desired communication latency parameter that considers at least one or more among channel congestion communication and a priority of the intended transmission;
determine a lower energy resource pool from the candidate resource pool;
select a low energy resource from the lowest energy resource set; and transmit data on the selected low energy resource.
[24]
24. Non-transitory computer-readable media according to claim 23, the code executable by a processor to minimize the time window based on a busy channel ratio measurement that is indicative of communication channel congestion.
Petition 870190094846, of 09/23/2019, p. 67/86
8/9
[25]
25. Non-transitory, computer-readable media according to claim 23, the code executable by a processor to minimize the time window based on packet priority information that is indicative of subsequent transmission priority.
[26]
26. Non-transitory, computer-readable media according to claim 23, code executable by a processor for:
transmitting data that corresponds to a plurality of information packets with a plurality of different priorities in the selected low energy resource over time; and minimizing the time window based on at least one of a higher packet priority from the plurality of different priorities anticipated to be transmitted using the low energy resource selected over time and an average packet priority from the plurality of different priorities anticipated to be transmitted using the low energy resource selected over time.
[27]
27. Non-transitory computer-readable media according to claim 23, the code executable by a processor to start with a minimum time window and then increase the time window if the size of the lower energy resource set is less than a configured threshold (X%) of the size of the candidate resource set within the time window.
[28]
28. Non-transitory, computer-readable media according to claim 23, the code executable by a processor to select the low power resource at
Petition 870190094846, of 09/23/2019, p. 68/86
9/9 from the lowest energy resource pool as the resource that leads to the lowest latency.
[29]
29. Non-transitory computer-readable media, according to claim 23, the code executable by a processor to determine resources occupied within the set of candidate resources based on received control information indicating resource reservation information; and where a minimum and maximum time window limit is a function of a usage level based on the energy of remaining candidate resources from the candidate resource pool after excluding occupied resources.

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同族专利:

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公开号 | 公开日

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AU2018237381A1|2019-09-12|

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EP3603246B1|2021-05-05|

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CA3054944A1|2018-09-27|

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EP3603246A1|2020-02-05|

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US20180279259A1|2018-09-27|

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SG11201907664VA|2019-10-30|

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ES2874049T3|2021-11-04|

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US10251158B2|2019-04-02|

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CN110521255A|2019-11-29|

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TW201840230A|2018-11-01|

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WO2018175822A1|2018-09-27|

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AU2018237381B2|2020-09-10|

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

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