WO2023151030A1 - Station de base, équipement d'utilisateur et procédé de communication sans fil pour trafic de réalité étendue - Google Patents

Station de base, équipement d'utilisateur et procédé de communication sans fil pour trafic de réalité étendue Download PDF

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Publication number
WO2023151030A1
WO2023151030A1 PCT/CN2022/076057 CN2022076057W WO2023151030A1 WO 2023151030 A1 WO2023151030 A1 WO 2023151030A1 CN 2022076057 W CN2022076057 W CN 2022076057W WO 2023151030 A1 WO2023151030 A1 WO 2023151030A1
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Prior art keywords
service
radio resources
radio resource
resource groups
computer program
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PCT/CN2022/076057
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English (en)
Inventor
Yincheng Zhang
Jia SHENG
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Huizhou Tcl Mobile Communication Co., Ltd.
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Priority to CN202280091255.6A priority Critical patent/CN118679819A/zh
Priority to PCT/CN2022/076057 priority patent/WO2023151030A1/fr
Publication of WO2023151030A1 publication Critical patent/WO2023151030A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/11—Semi-persistent scheduling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/50—Service provisioning or reconfiguring
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446—Resources in time domain, e.g. slots or frames
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
    • H04W72/543—Allocation or scheduling criteria for wireless resources based on quality criteria based on requested quality, e.g. QoS
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W80/00—Wireless network protocols or protocol adaptations to wireless operation
    • H04W80/02—Data link layer protocols

Definitions

  • the present disclosure relates to the field of communication systems, and more particularly, to base station, user equipment, and wireless communication method for extended reality (XR) traffic.
  • XR extended reality
  • Wireless communication systems such as the third-generation (3G) of mobile telephone standards and technology are well known.
  • 3G standards and technology have been developed by the Third Generation Partnership Project (3GPP) .
  • the 3rd generation of wireless communications has generally been developed to support macro-cell mobile phone communications.
  • Communication systems and networks have developed towards being a broadband and mobile system.
  • UE user equipment
  • RAN radio access network
  • the RAN comprises a set of base stations (BSs) that provide wireless links to the UEs located in cells covered by the base station, and an interface to a core network (CN) which provides overall network control.
  • BSs base stations
  • CN core network
  • the RAN and CN each conduct respective functions in relation to the overall network.
  • LTE Long Term Evolution
  • E-UTRAN Evolved Universal Mobile Telecommunication System Territorial Radio Access Network
  • 5G or NR new radio
  • the 5G wireless communication system has been designed to deliver enhanced mobile broadband (eMBB) , ultra-reliable low-latency communication (URLLC) , and massive machine type communication (mMTC) services.
  • eMBB enhanced mobile broadband
  • URLLC ultra-reliable low-latency communication
  • mMTC massive machine type communication
  • Extended reality (XR) and cloud gaming service is an important media application enabled by 5G.
  • XR service has some unique characteristics in the traffic profile while the current 5G system may not support XR service every well.
  • Some characteristics of XR traffic are list in the following:
  • Non-integer periodicity according to the agreed traffic models for XR service in the release seventeen (Rel-17) XR study item (SI) in 3GPP RAN1, a video stream of XR service can be configured with 30, 60, 90, or 120 frames per second (FPS) . As a consequence, the XR frames will arrive at RAN quasi-periodically with respective periodicity of 1/60, 1/90, or 1/120 second, known as non-integer periodicity.
  • SPS Semi-persistent scheduling
  • CG configured grant
  • the current configurations for SPS/CG periodicities cannot match the non-integer periodicities of the XR traffic.
  • XR traffic has a jitter effect for the data packet arrival time due to the different delay caused by XR data encoding, rendering, and network delivery.
  • the jitter effect renders the arrival time for a particular packet unpredictable for an XR traffic receiver device, such as a gNB or a UE.
  • a truncated Gaussian distribution is used to model the jitter for XR traffic.
  • the range of jitter is agreed to be [-4, 4] ms (i.e., from -4 ms to 4 ms) as baseline and [-5, 5] ms (i.e., from -5 ms to 5 ms) as optional.
  • a jitter is agreed to be [-4, 4] ms (i.e., from -4 ms to 4 ms) as baseline and [-5, 5] ms (i.e., from -5 ms to 5 ms) as optional.
  • An object of the present disclosure is to propose a user equipment (UE) , a base station, and a wireless communication method.
  • UE user equipment
  • an embodiment of the invention provides a wireless communication method executable in a base station, comprising:
  • the configuration of the configured radio resources for the XR service comprises at least one of:
  • the periodic transmission pattern includes one or more radio resource groups among the plurality of radio resource groups, each of the plurality of radio resource groups comprises a number of periodic blocks of configured radio resources for the XR service;
  • an embodiment of the invention provides a base station comprising a processor configured to call and run a computer program stored in a memory, to cause a device in which the processor is installed to execute the disclosed method.
  • an embodiment of the invention provides a wireless communication method executable in a user equipment (UE) , comprising:
  • configuration of the configured radio resources for the XR service comprises at least one of:
  • the periodic transmission pattern includes one or more radio resource groups among the plurality of radio resource groups, each of the plurality of radio resource groups comprises a number of periodic blocks of configured radio resources for the XR service;
  • an embodiment of the invention provides a user equipment (UE) comprising a processor configured to call and run a computer program stored in a memory, to cause a device in which the processor is installed to execute the disclosed method.
  • UE user equipment
  • the disclosed method may be implemented in a chip.
  • the chip may include a processor, configured to call and run a computer program stored in a memory, to cause a device in which the chip is installed to execute the disclosed method.
  • the disclosed method may be programmed as computer executable instructions stored in non-transitory computer readable medium.
  • the non-transitory computer readable medium when loaded to a computer, directs a processor of the computer to execute the disclosed method.
  • the non-transitory computer readable medium may comprise at least one from a group consisting of: a hard disk, a CD-ROM, an optical storage device, a magnetic storage device, a Read Only Memory, a Programmable Read Only Memory, an Erasable Programmable Read Only Memory, EPROM, an Electrically Erasable Programmable Read Only Memory and a Flash memory.
  • the disclosed method may be programmed as a computer program product, which causes a computer to execute the disclosed method.
  • the disclosed method may be programmed as a computer program, which causes a computer to execute the disclosed method.
  • Embodiments of the invention provides the following useful effects:
  • a video frame of an XR service may be segmented into one or multiple packets for transmission on a network periodically.
  • a gNB configures and groups radio resources (e.g., SPS and CG) in time domain for XR service (s) in NR to carry video frame (s) of the XR service (s) .
  • radio resources e.g., SPS and CG
  • An embodiment of the disclosed method provides related signaling to support enhanced radio resources allocation for XR service (s) and improve the radio source efficiency in NR.
  • FIG. 1 illustrates a schematic view showing an example of a telecommunication system.
  • FIG. 2 illustrates a schematic view showing an embodiment of a network for the disclosed wireless communication method.
  • FIG. 3 illustrates a schematic view showing an example of protocol stacks of entities involved in an XR service between a UE, a gNB, and a 5GC.
  • FIG. 4 illustrates a schematic view showing a wireless communication method according to an embodiment of the disclosure.
  • FIG. 5 illustrates a schematic view showing a wireless communication method according to an embodiment of the disclosure.
  • FIG. 6 illustrates a schematic view showing an example of radio resource configuration for an XR service.
  • FIG. 7 illustrates a schematic view showing an example of radio resource configuration for an XR service with non-integer periodicity.
  • FIG. 8 illustrates a schematic view showing an example of radio resource configuration for an XR service with integer periodicity.
  • FIG. 9 illustrates a schematic view showing an example of enhanced signaling for radio resource configuration for an XR service.
  • FIG. 10 illustrates a schematic view showing a system for wireless communication according to an embodiment of the present disclosure.
  • This invention disclosed a wireless communication method for extended reality (XR) traffic to enhance the radio resource allocation (e.g., semi-persistent scheduling (SPS) or configured grant (CG) ) in 5G wireless communication system (New Radio, NR) to support extended reality (XR) service.
  • XR service may include augmented reality (AR) , virtual reality (VR) , or mixed reality (MR) .
  • a telecommunication system including a UE 10a, a UE 10b, a base station (BS) 20a, and a network entity device 30 executes the disclosed method according to an embodiment of the present disclosure.
  • FIG. 1 is shown for illustrative, not limiting, and the system may comprise more UEs, BSs, and CN entities. Connections between devices and device components are shown as lines and arrows in the FIGs.
  • the UE 10a may include a processor 11a, a memory 12a, and a transceiver 13a.
  • the UE 10b may include a processor 11b, a memory 12b, and a transceiver 13b.
  • the base station 20a may include a processor 21a, a memory 22a, and a transceiver 23a.
  • the network entity device 30 may include a processor 31, a memory 32, and a transceiver 33.
  • Each of the processors 11a, 11b, 21a, and 31 may be configured to implement proposed functions, procedures and/or methods described in the description. Layers of radio interface protocol may be implemented in the processors 11a, 11b, 21a, and 31.
  • Each of the memory 12a, 12b, 22a, and 32 operatively stores a variety of programs and information to operate a connected processor.
  • Each of the transceivers 13a, 13b, 23a, and 33 is operatively coupled with a connected processor, transmits and/or receives radio signals or wireline signals.
  • the UE 10a may be in communication with the UE 10b through a sidelink.
  • the base station 20a may be an eNB, a gNB, or one of other types of radio nodes, and may configure radio resources for the UE 10a and UE 10b.
  • the network entity device 30 may be a node in a CN.
  • CN may include LTE CN or 5G core (5GC) which includes user plane function (UPF) , session management function (SMF) , 5G core access and mobility management function (AMF) , unified data management (UDM) , policy control function (PCF) , control plane (CP) /user plane (UP) separation (CUPS) , authentication server (AUSF) , network slice selection function (NSSF) , and the network exposure function (NEF) .
  • UPF user plane function
  • SMF session management function
  • AMF 5G core access and mobility management function
  • UDM unified data management
  • PCF policy control function
  • PCF control plane
  • CP control plane
  • UP user plane
  • CUPS authentication server
  • NSSF network slice selection function
  • NEF network exposure function
  • An example of the UE in the description may include one of the UE 10a or UE 10b.
  • An example of the base station in the description may include the base station 20a.
  • Uplink (UL) transmission of a control signal or data may be a transmission operation from a UE to a base station.
  • Downlink (DL) transmission of a control signal or data may be a transmission operation from a base station to a UE.
  • a DL control signal may comprise downlink control information (DCI) or a radio resource control (RRC) signal, from a base station to a UE.
  • DCI downlink control information
  • RRC radio resource control
  • FIG. 2 is a network model for XR service supported by 5G system.
  • a UE 10 is a 5G terminal which can support XR service and XR application.
  • a gNB 20 is 5G radio node. The gNB 20 communicates with the UE 10 and provides NR user plane and control plane protocol terminations towards the UE via NR Uu interface. The gNB 20 connects via the NG interface to a 5GC 300.
  • An AMF 30b is an AMF in the 5GC 300 which is a 5G Core Network.
  • DN 40 is a data network (DN) 40 where an XR server 41 providing XR service is located. The DN 40 can provide network operator services, Internet access, or 3rd party services.
  • the XR server 41 may include a processor 411, a memory 412, and a transceiver 413.
  • the processor 411 may be configured to implement XR service related functions, procedures and/or methods described in the description. Layers of radio interface protocol may be implemented in the processor 411.
  • the memory 412 operatively stores a variety of programs and information to operate a connected processor.
  • the transceivers 413 is operatively coupled with a connected processor, transmits and/or receives radio signals or wireline signals.
  • Each of the processors 411, 11a, 11b, 21a, and 31 may include an application-specific integrated circuit (ASICs) , other chipsets, logic circuits and/or data processing devices.
  • ASICs application-specific integrated circuit
  • Each of the memory 412, 12a, 12b, 22a, and 32 may include read-only memory (ROM) , a random access memory (RAM) , a flash memory, a memory card, a storage medium and/or other storage devices.
  • Each of the transceivers 413, 13a, 13b, 23a, and 33 may include baseband circuitry and radio frequency (RF) circuitry to process radio frequency signals.
  • RF radio frequency
  • the modules may be stored in a memory and executed by the processors.
  • the memory may be implemented within a processor or external to the processor, in which those may be communicatively coupled to the processor via various means are known in the art.
  • a device executing the wireless communication method may be a transmitter device that transmits an XR traffic flow of an XR service to a receiver device or a receiver device that receives an XR traffic flow.
  • the device executing the wireless communication method may comprise the gNB 20, an XR server 41 in data network 40, or a UE. That is, the XR server 41 in data network 40 may operates as a transmitter device that executes a wireless communication method in some XR traffic delivery occasions.
  • the UE 10 may operate as a transmitter device to execute a wireless communication method in some XR traffic delivery occasions.
  • the transmitter device may comprise an intermediate device between the UE 10 and the XR server 41.
  • the UE 10 may comprise an embodiment of the UE 10a or UE 10b.
  • the gNB 20 may comprise an embodiment of the base station 20a.
  • the wireless communication method may be executed by a base station, such as another gNB, an eNB, a base station integrating an eNB and a gNB, or a base station for beyond 5G technologies.
  • the AMF/5GC 30b may comprise another network entity of 5GC.
  • One or more steps (or blocks) in of embodiments of the disclosure may be implemented as computer programs, instructions, software module (s) stored in a memory of the transmitter device, or circuits or hardware module (s) in a processor of the transmitter device, or IC chip (s) , circuits, or plug-in (s) of the transmitter device.
  • FIG. 3 show an example of overall protocol stacks between the UE 10 and the AMF/5GC 30b including intermediate entities (i.e., gNB 20) . Communications between any couple of entities in the same protocol layer is shown as arrows. Protocol layers in FIG. 3 have been standardized and are briefly explained in the following:
  • the physical layer of Internet which can be any suitable layer 1 technique, such as point-to-point or point-to-multipoint techniques;
  • Data link layer The data link layer of Internet which can be any suitable Data Link Layer protocol, such as point-to-point protocol (PPP) , Ethernet, etc.;
  • PPP point-to-point protocol
  • Ethernet etc.
  • IP Internet Protocol
  • IPv6 Internet Protocol, Version 6 (IPv6) Specification
  • ⁇ PHY The physical layer of NR, which can be referred to in 3GPP TS 38.211 to 38.215;
  • ⁇ MAC NR Medium Access Control (MAC) protocol, which can be referred to in 3GPP TS 38.321;
  • RLC Radio Link Control
  • SCTP stream control transmission protocol
  • ⁇ PDCP NR; Packet Data Convergence Protocol (PDCP) , which can be referred to in 3GPP TS 38.323; ⁇ SDAP: Service Data Adaptation Protocol (SDAP) of Evolved Universal Terrestrial Radio Access (E-UTRA) and NR, which can be referred to in 3GPP TS 37.324;
  • SDAP Service Data Adaptation Protocol
  • E-UTRA Evolved Universal Terrestrial Radio Access
  • RRC radio resource control
  • NG-AP NG application protocol (NG-AP) .
  • a video stream of an XR service will be encoded and compressed in form of frames quasi-periodically with the respective frame periodicity of 1/60, 1/90, or 1/120 second.
  • the periodicities are non-integer and mismatch with the configured periodicity of discontinuous reception (DRX) cycle and SPS/CG, which can degrade the performance of the XR service significantly in 5G-RAN.
  • This disclosed method is to address this issue by grouping radio resources (e.g., SPS and/or CG) in a time domain for an XR traffic service in NR.
  • a radio resource group for an XR service is abbreviated and referred to as a group, and a periodic transmission pattern for an XR service is abbreviated and referred to as a pattern.
  • a radio resource block may comprise radio resources in resource elements (REs) or resource blocks (RBs) .
  • SPS may represent a SPS assignment or SPS transmission.
  • the transmitter device may divide a video stream of an XR service into a number of transport units, encapsulate and transmit each of the transport units into a transport packet transmitted across the network, the transmission mechanism of the XR service is actually based on packet instead of frame.
  • the size of each of the packets may be variable, the number of the packets may be variable and configurable based on one or more parameters of the QoS requirements and characteristics of the XR service, such as PDB, PER, PLR, frame error rate, frame delay budget, resolution, frame rate, frame size, and/or data rate.
  • Transport packets of the video stream of the XR service arrive at the gNB 20 independently in a period of time.
  • the transport packets may have periodic characteristic, and the periodicity is dependent on the periodicity of a frame rate of the video stream of the XR service.
  • a base station e.g., the gNB 20
  • the configuring of the radio resources (e.g., SPS and/or CG) for the XR service may comprise:
  • M a number of groups of the blocks of radio resources (e.g., SPS and/or CG) for the periodic transmission pattern, and an interval (referred to as T1) between two adjacent groups of the blocks if more than one groups are configured
  • N a number (referred to as N) blocks of radio resources (e.g., SPS and/or CG) in each of the one or more groups and an interval (referred to as T2) between two adjacent blocks of radio resources (e.g., SPS and/or CG) .
  • the periodicity (P2) of the periodic transmission pattern, the number (M) of groups, the interval (T1) between two groups in the periodic transmission pattern, the number (N) of blocks of radio resources (e.g., SPS and/or CG) , and the interval (T2) between two adjacent blocks of radio resources (e.g., SPS and/or CG) in a group are configurable and can be determined considering one or more parameters of quality of service (QoS) requirements and characteristics of the XR service.
  • the one or more parameters of QoS requirements of the XR service may comprise one or more of packet delay budget (PDB) , packet error rate (PER) , packet loss rate (PLR) , frame error rate, frame delay budget, resolution, frame rate, frame size, and data rate.
  • PDB packet delay budget
  • PER packet error rate
  • PLR packet loss rate
  • the gNB 20 and the UE 10 execute an embodiment of the disclosed method.
  • the UE 10 initiates an XR service (block 201) .
  • the gNB 20 determines a frame periodicity of an XR stream of an XR service according to a frame rate of the XR stream of the XR service (block 101) . For example, with reference to FIG. 6, for a video stream of the XR service with a frame rate of 30, 60, 90, or 120 frame per second (FPS) , the gNB 20 determines a corresponding frame periodicity of the video stream as 1000/30, 1000/60, 1000/90, or 1000/120 milliseconds (ms) .
  • ms milliseconds
  • the gNB 20 determines (block 103) configuration of configured radio resources for the XR service based on the frame periodicity, wherein the configuration of the configured radio resources for the XR service comprises at least one of:
  • the periodic transmission pattern includes one or more radio resource groups among the plurality of radio resource groups.
  • Each of the plurality of radio resource groups comprises a number N of periodic blocks of configured radio resources for the XR service.
  • Each of the periodic blocks of the configured radio resources for the XR service comprise a semi-persistent scheduling (SPS) assignment or a configured grant for the XR service.
  • SPS semi-persistent scheduling
  • the frame periodicity of the XR stream of the XR service is represented by a variable P1.
  • the basic slot-based periodicity of a periodic transmission pattern is represented by a variable P2.
  • the interval of a plurality of radio resource groups for the XR service is represented by a variable T1. An interval of a first couple of two adjacent radio resource groups in the periodic transmission pattern is the same as or different from a second couple of two adjacent radio resource groups in the periodic transmission pattern.
  • the gNB 20 may determine one or more of the parameters P1, P2, and T1 based on quality of service (QoS) requirement of the XR service.
  • QoS requirement of the XR service comprises a packet delay budget (PDB) , packet error rate (PER) , packet loss rate (PLR) , frame error rate, frame delay budget, resolution, frame rate, frame size, or data rate.
  • the gNB 20 configures an integer K so that K *P1 is integer multiples of (1/2) n (ms) , and the periodicity (P2) of the periodic transmission pattern is configured as K*P1, i.e.
  • ⁇ n is a positive integer.
  • ⁇ K is a positive integer.
  • ⁇ (1/2) n is slot periodicity associated with n, and (1/2) n ms is determined by the length of a slot in an NR radio frame.
  • the variable ⁇ is defined in the 3GPP NR standards.
  • P2 is integer multiples of a slot of a corresponding NR radio frame.
  • the gNB 20 allocates the configured radio resources for the XR service according to the configuration (block 105) .
  • the UE 10 receives the configuration of configured radio resources for an XR service based on a frame periodicity of an XR stream of an XR service (block 203) .
  • the UE 10 transmits or receives data of the XR stream of the XR service on the configured radio resources for the XR service. (Block 205) .
  • the gNB 20 determines additional configuration of the configured radio resources for the XR service, wherein the additional configuration of the configured radio resources for the XR service comprises one or more of:
  • K, M, N, n, T1, T2, P1, and P2 is configurable, each of K, M, and N is integer and greater than 0, n is integer and equal to or greater than 0.
  • the gNB 20 may use one or more timers in a periodic timer function to time each of T1, T2, P1, and P2.
  • the UE 10 may use one or more timers in a periodic timer function to time each of T1, T2, P1, and P2.
  • K, n, and X is determined by one or more parameters of the QoS requirements and characteristics of the XR service, such as PDB (Packet Delay Budget) , PER (Packet Error Rate) , PLR (Packet Loss Rate) , frame error rate, frame delay budget, resolution, frame rate, frame size, and data rate;
  • PDB Packet Delay Budget
  • PER Packet Error Rate
  • PLR Packet Loss Rate
  • n When to determine n, the numerology of NR could be taken into consideration as well. Especially, n could be configured with an appropriate value so that (1/2) n is integer multiples of the length of slot in NR.
  • Embodiment of the invention are detailed in the following for illustration not for limiting.
  • the number (M) of groups in the periodic transmission pattern is determined by the K.
  • the number M is typically equal to K.
  • the interval (T1) between two adjacent groups in the periodic transmission pattern is integer multiples of (1/2) n (ms) . If the periodic transmission pattern comprises groups with intervals, the length of the intervals can be the same or different, and a sum of the length of all the intervals is equal to the periodicity of the periodic transmission pattern.
  • the number (N) of blocks of radio resources (e.g., SPS and/or CG) for each group in the periodic transmission pattern is an integer.
  • the gNB 20 may determine the N considering one or more parameters of quality of service (QoS) requirements and characteristics of the XR service.
  • the one or more parameters of QoS requirements of the XR service may comprise one or more of packet delay budget (PDB) , packet error rate (PER) , packet loss rate (PLR) , frame error rate, frame delay budget, resolution, frame rate, frame size, and data rate.
  • PDB packet delay budget
  • PER packet error rate
  • PLR packet loss rate
  • frame error rate frame delay budget
  • the interval (T2) between two adjacent blocks of radio resources (e.g., SPS and/or CG) in a group is also configurable as an integer multiples of the basic time unit (1/2) n (ms) Typically, (1/2) n ms is the length of a slot in NR.
  • the interval (T2) between two adjacent blocks of radio resources (e.g., SPS and/or CG) in a group may be configured as an integer multiples of an OFDM symbol which is smaller time unit in NR and can be one fourteenth or one twelfth of a slot.
  • OFDM stands for orthogonal frequency division multiplexing (OFDM) .
  • the gNB 20 may determine the interval T2 considering one or more parameters of quality of service (QoS) requirements and characteristics of the XR service.
  • the one or more parameters of QoS requirements of the XR service may comprise one or more of packet delay budget (PDB) , packet error rate (PER) , packet loss rate (PLR) , frame error rate, frame delay budget, resolution, frame rate, frame size, and data rate.
  • PDB packet delay budget
  • PER packet error rate
  • PLR packet loss rate
  • Typical frame rates of a video stream of an XR service include 30, 60, 90, and 120 FPS.
  • An XR service having a video stream with a frame rate of 30, 60, 90, or 120 FPS has non-integer periodicity of 1000/30, 1000/60, 1000/90, or 1000/120 ms.
  • An interval between two adjacent radio resource groups may be a rounding of 100/3.
  • the variable n is defined in 3GPP standard.
  • An interval of the a first couple of two adjacent radio resource groups in the periodic transmission pattern can be the same as or different from a second couple of two adjacent radio resource groups in the periodic transmission pattern.
  • the length of each of the 3 intervals (T1) is 34 ms or 33ms, and a sum of the 3 intervals is equal to a length of the periodicity of the periodic transmission pattern.
  • An interval between two adjacent radio resource groups may be 34 ms or 33ms.
  • the lengths of the 3 intervals are different, and the first one is 34ms, the second and the third are 33ms, the total length of the 3 intervals is 100 (ms) which is equal to the periodicity of the periodic transmission pattern.
  • the gNB 20 may obtain 34 ms from rounding up 100/3 and 33 ms from rounding down 100/3.
  • the gNB 20 may first obtain an interval between two adjacent radio resource groups from rounding up or rounding down of the frame periodicity P1 and obtain the periodicity of the periodic transmission pattern from the accumulated length of intervals in a periodic transmission pattern.
  • the gNB 20 may obtain the periodicity of the periodic transmission pattern from the frame periodicity P1 using the formula (1) and formula (2) and obtain an interval between two adjacent radio resource groups from dividing the periodicity of the periodic transmission pattern by a number of intervals in the periodic transmission pattern and rounding up or rounding down the result of the dividing.
  • each group of radio resources for the XR service comprises four UL/DL radio resource blocks.
  • each group of radio resources for the XR service may comprise four SPS downlink assignments, a combination of one SPS DL assignment and three UL CGs, a combination of two SPS DL assignments and one UL CG, a combination of three SPS DL assignments and one UL CG, or four UL CGs.
  • T2 2 (ms) .
  • T 2 (ms) .
  • an interval between two adjacent radio resources blocks in each group is two ms.
  • typical frame rates of a video stream of an XR service include 50 and 250 FPS.
  • An XR service having a video stream with a frame rate of 50 or 250 FPS has non-integer periodicity of 1000/50 ms or 1000/250 ms.
  • the gNB 20 may obtain the periodicity of the periodic transmission pattern from the frame periodicity P1 using the formula (1) and formula (2) and obtain an interval between two adjacent radio resource groups from dividing the periodicity of the periodic transmission pattern by a number of intervals in the periodic transmission pattern and rounding up or rounding down the result of the dividing.
  • each group of radio resources for the XR service comprises five UL/DL radio resources blocks.
  • each group of radio resources for the XR service may comprise five SPS downlink assignments, a combination of one SPS DL assignment and four UL CGs, a combination of two SPS DL assignments and three UL CGs, a combination of three SPS DL assignments and two UL CGs, a combination of four SPS DL assignments and one UL CG, or five UL CGs.
  • T2 2 (ms) .
  • T 2 (ms) .
  • an interval between two adjacent radio resource blocks in each group is two ms.
  • XR service related signaling enhancement for the SPS/CG enhancement comprise:
  • the UE 10 sends information about QoS requirements and characteristics of the XR service in an uplink radio resource control (RRC) message to the gNB 20.
  • the AMF/5GC 30b may send information about QoS requirements and characteristics of the XR service in an NG-AP message to the gNB 20.
  • the gNB 20 acquires the information about QoS requirements and characteristics of an XR service from the UE 10 in the radio resource control (RRC) message via NR Uu interface (208) or from the AMF 30b in an NG-AP message via NG interface (210) .
  • RRC radio resource control
  • the gNB 20 acquires information about QoS requirements and characteristics of the XR service in an uplink radio resource control (RRC) message from the UE 10.
  • RRC radio resource control
  • the information about the QoS requirements and characteristics of the XR service includes one or more following parameters:
  • the gNB 20 configures the radio resources (e.g., SPS/CG) for the XR service based on the QoS requirements and characteristics of the XR service and then sends configuration information of radio resources (e.g., SPS/CG) for the XR service to the UE 10 in RRC message via NR Uu interface (212) .
  • the gNB 20 sends configuration of configured radio resources for the XR service in a downlink RRC message to UE 10.
  • the UE receives the configuration of configured radio resources for the XR service in the downlink RRC message.
  • the configuration information of radio resources (e.g., SPS/CG) for the XR service may comprise one or more of the parameters P1, P2, T1, T2, M, N, and n.
  • the frame periodicity of the XR stream of the XR service is represented by a variable P1.
  • the basic slot-based periodicity of a periodic transmission pattern is represented by a variable P2.
  • the interval of a plurality of radio resource groups for the XR service is represented by a variable T1.
  • the gNB 20 may determine one or more of the parameters P1, P2, and T1 based on quality of service (QoS) requirement of the XR service.
  • the gNB 20 may determine additional configuration of the configured radio resources for the XR service, wherein the additional configuration of the configured radio resources for the XR service comprises one or more of:
  • the determining additional configuration of the configured radio resources for the XR service is performed based on quality of service (QoS) requirement of the XR service.
  • QoS requirement of the XR service comprises a packet delay budget (PDB) , packet error rate (PER) , packet loss rate (PLR) , frame error rate, frame delay budget, resolution, frame rate, frame size, or data rate.
  • PDB packet delay budget
  • PER packet error rate
  • PLR packet loss rate
  • the gNB 20 may activate or deactivate configured radio resources (e.g., SPS/CG) for the XR service by sending a downlink RRC message or a downlink medium access control (MAC) message via NR Uu interface to the UE 10 (214) .
  • the UE 10 receives the downlink RRC message or the downlink MAC message and determines activation or deactivation of the configured radio resources (e.g., SPS/CG) for the XR service by decoding the downlink RRC message or the downlink MAC message.
  • the downlink MAC message may comprise a MAC control element (MAC CE) .
  • the gNB 20 may send downlink control information (DCI) in a physical downlink control channel (PDCCH) to the UE 10 to indicate to the UE 10 about the cancellation of a SPS transmission on the one or more specific SPS assignments for the XR service by the gNB 20 in order to improve the radio resource efficiency (216) .
  • the UE 10 receives the downlink control information (DCI) in the physical downlink control channel (PDCCH) that indicates cancellation of SPS assignment for the XR service.
  • SPS transmission is a DL transmission carried out over a block of configured radio resources associated with a specific SPS assignment.
  • Cancellation of the SPS transmission for the XR service is restricted to the SPS transmission, and deactivation of the configured radio resources (e.g., SPS/CG) for the XR service applies to all configured radio resources (e.g., SPS/CG) for the XR service, rather than only one specific SPS transmission.
  • configured radio resources e.g., SPS/CG
  • the UE 10 may send uplink control information (UCI) in a physical uplink control channel (PUCCH) or a physical uplink shared channel (PUSCH) to indicate to the gNB 20 about the cancellation of CG transmission on the one or more specific CGs for the XR service by the UE 10 in order to improve the radio resource efficiency (218) .
  • the gNB 20 receives from the UE 10 the uplink control information (UCI) in the physical uplink control channel (PUCCH) or the physical uplink shared channel (PUSCH) , which indicates cancellation of the CG for the XR service.
  • CG transmission is a UL transmission carried out over a block of configured radio resources associated with a specific CG.
  • Cancellation of the CG transmission for the XR service is restricted to the CG transmission, and deactivation of the configured radio resources (e.g., SPS/CG) for the XR service applies to all configured radio resources (e.g., SPS/CG) for the XR service, rather than only one specific CG transmission.
  • configured radio resources e.g., SPS/CG
  • FIG. 10 is a block diagram of an example system 700 for wireless communication according to an embodiment of the present disclosure. Embodiments described herein may be implemented into the system using any suitably configured hardware and/or software.
  • FIG. 10 illustrates the system 700 including a radio frequency (RF) circuitry 710, a baseband circuitry 720, a processing unit 730, a memory/storage 740, a display 750, a camera 760, a sensor 770, and an input/output (I/O) interface 780, coupled with each other as illustrated.
  • RF radio frequency
  • the processing unit 730 may include circuitry, such as, but not limited to, one or more single-core or multi-core processors.
  • the processors may include any combinations of general-purpose processors and dedicated processors, such as graphics processors and application processors.
  • the processors may be coupled with the memory/storage and configured to execute instructions stored in the memory/storage to enable various applications and/or operating systems running on the system.
  • the radio control functions may include, but are not limited to, signal modulation, encoding, decoding, radio frequency shifting, etc.
  • the baseband circuitry may provide for communication compatible with one or more radio technologies.
  • the baseband circuitry may support communication with 5G NR, LTE, an evolved universal terrestrial radio access network (EUTRAN) and/or other wireless metropolitan area networks (WMAN) , a wireless local area network (WLAN) , a wireless personal area network (WPAN) .
  • EUTRAN evolved universal terrestrial radio access network
  • WMAN wireless metropolitan area networks
  • WLAN wireless local area network
  • WPAN wireless personal area network
  • Embodiments in which the baseband circuitry is configured to support radio communications of more than one wireless protocol may be referred to as multi-mode baseband circuitry.
  • the baseband circuitry 720 may include circuitry to operate with signals that are not strictly considered as being in a baseband frequency.
  • baseband circuitry may include circuitry to operate with signals having an intermediate frequency, which is between a baseband frequency and a radio frequency.
  • the system 700 may be a mobile computing device such as, but not limited to, a laptop computing device, a tablet computing device, a netbook, an ultrabook, a smartphone, etc.
  • the system may have more or less components, and/or different architectures.
  • the methods described herein may be implemented as a computer program.
  • the computer program may be stored on a storage medium, such as a non-transitory storage medium.
  • the embodiment of the present disclosure is a combination of techniques/processes that can be adopted in 3GPP specification to create an end product.
  • the software function unit is realized and used and sold as a product, it can be stored in a readable storage medium in a computer.
  • the technical plan proposed by the present disclosure can be essentially or partially realized as the form of a software product.
  • one part of the technical plan beneficial to the conventional technology can be realized as the form of a software product.
  • the software product in the computer is stored in a storage medium, including a plurality of commands for a computational device (such as a personal computer, a server, or a network device) to run all or some of the steps disclosed by the embodiments of the present disclosure.
  • the storage medium includes a USB disk, a mobile hard disk, a read-only memory (ROM) , a random access memory (RAM) , a floppy disk, or other kinds of media capable of storing program codes.
  • a video frame of an XR service may be segmented into one or multiple packets for transmission on a network periodically.
  • a gNB configures and groups radio resources (e.g., SPS and CG) in time domain for XR service (s) in NR to carry video frame (s) of the XR service (s) .
  • a UE transmits and receives packets of the XR service (s) using the configured and grouped radio resources (e.g., SPS and CG) .
  • An embodiment of the disclosed method provides related signaling to support enhanced radio resources allocation for XR service (s) and improve the radio source efficiency in NR.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente divulgation concerne une station de base, un équipement d'utilisateur (UE) et un procédé de communication sans fil. La station de base détermine une périodicité de trame d'un flux de réalité étendue, XR, d'un service XR selon un débit de trames du flux XR et détermine une configuration de ressources radioélectriques configurées pour le service XR sur la base de la périodicité de trame. La configuration des ressources radioélectriques configurées pour le service XR comprend une périodicité basique, basée sur le créneau, d'un motif de transmission périodique du service XR et/ou un intervalle d'une pluralité de groupes de ressource radioélectriques pour le service XR. Le motif de transmission périodique inclut un ou plusieurs groupes de ressource radioélectriques. Chaque groupe de la pluralité de groupes de ressource radioélectriques comprend un certain nombre de blocs périodiques de ressources radioélectriques configurées pour le service XR. La station de base attribue les ressources radioélectriques configurées pour le service XR.
PCT/CN2022/076057 2022-02-11 2022-02-11 Station de base, équipement d'utilisateur et procédé de communication sans fil pour trafic de réalité étendue WO2023151030A1 (fr)

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CN202280091255.6A CN118679819A (zh) 2022-02-11 2022-02-11 基站、用户设备和用于扩展现实流量的无线通信方法
PCT/CN2022/076057 WO2023151030A1 (fr) 2022-02-11 2022-02-11 Station de base, équipement d'utilisateur et procédé de communication sans fil pour trafic de réalité étendue

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US20190289616A1 (en) * 2018-03-19 2019-09-19 Qualcomm Incorporated Time-sensitive networking frame pre-emption across cellular interface
US20190313375A1 (en) * 2016-07-07 2019-10-10 Panasonic Intellectual Property Corporation Of America Improved semi-persistent resource allocation behavior for v2x transmissions
US20200092908A1 (en) * 2018-09-19 2020-03-19 Qualcomm Incorporated Sps for signaling with non-integer periodicities
US20200154397A1 (en) * 2016-12-29 2020-05-14 Lg Electronics Inc. Method for transmitting and receiving signal in wireless communication system and apparatus therefor
CN111617466A (zh) * 2020-05-12 2020-09-04 咪咕文化科技有限公司 编码格式的确定方法、装置及云游戏的实现方法

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Publication number Priority date Publication date Assignee Title
US20190313375A1 (en) * 2016-07-07 2019-10-10 Panasonic Intellectual Property Corporation Of America Improved semi-persistent resource allocation behavior for v2x transmissions
US20200154397A1 (en) * 2016-12-29 2020-05-14 Lg Electronics Inc. Method for transmitting and receiving signal in wireless communication system and apparatus therefor
US20190289616A1 (en) * 2018-03-19 2019-09-19 Qualcomm Incorporated Time-sensitive networking frame pre-emption across cellular interface
US20200092908A1 (en) * 2018-09-19 2020-03-19 Qualcomm Incorporated Sps for signaling with non-integer periodicities
CN111617466A (zh) * 2020-05-12 2020-09-04 咪咕文化科技有限公司 编码格式的确定方法、装置及云游戏的实现方法

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