WO2024073877A1 - Procédé et dispositif de communication sans fil - Google Patents

Procédé et dispositif de communication sans fil Download PDF

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Publication number
WO2024073877A1
WO2024073877A1 PCT/CN2022/123729 CN2022123729W WO2024073877A1 WO 2024073877 A1 WO2024073877 A1 WO 2024073877A1 CN 2022123729 W CN2022123729 W CN 2022123729W WO 2024073877 A1 WO2024073877 A1 WO 2024073877A1
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Prior art keywords
pdu
jitter
packet
packets
message
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PCT/CN2022/123729
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English (en)
Inventor
Yincheng Zhang
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Shenzhen Tcl New Technology Co., Ltd.
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Priority to PCT/CN2022/123729 priority Critical patent/WO2024073877A1/fr
Publication of WO2024073877A1 publication Critical patent/WO2024073877A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L43/00—Arrangements for monitoring or testing data switching networks
    • H04L43/08—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
    • H04L43/0852—Delays
    • H04L43/087—Jitter
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L43/00—Arrangements for monitoring or testing data switching networks
    • H04L43/10—Active monitoring, e.g. heartbeat, ping or trace-route
    • H04L43/106—Active monitoring, e.g. heartbeat, ping or trace-route using time related information in packets, e.g. by adding timestamps

Definitions

  • the present disclosure relates to the field of telecommunication, and in particular to a wireless communication method and a device.
  • 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 is an umbrella term covering Augmented Reality (AR) , Mixed Reality (MR) and Virtual Reality (VR) .
  • AR Augmented Reality
  • MR Mixed Reality
  • VR Virtual Reality
  • XR applications typically require high throughput and low latency and Cloud Gaming is another application with the same requirement.
  • XR and Cloud Gaming are important applications that will be enabled by 5G.
  • XR service is featured by its special traffic streams which is real-time, high data rate, and low latency.
  • XR video streams have are different frames/video slices.
  • a group of pictures (GOP) has I/P/B frames.
  • the date size of different frames varies, and a frame can be segmented into a group of packets.
  • an application can decode frames/video slices if all packets of the frames/video slices are successfully received.
  • a group of packets (referred to as packet group hereafter) belonging to a frame/video slice should be handled as a unit.
  • packets of P frame and B frame depend on the packets of I frame
  • packets of B frame depends on the packets of P frame. That is, a dependency does exist between different groups of packets.
  • the characteristics of XR service mean different QoS requirements for different packet groups in one video stream.
  • a truncated Gaussian distribution is used to model the jitter of DL and UL video stream for XR services.
  • the range of jitter is agreed to be [-4, 4] ms (baseline) and [-5, 5] ms (optional) .
  • C-DRX is configured, some packets may arrive either earlier or later than the ON time, so extra delay may occur. To avoid this extra delay, the ON time of the C-DRX cycle needs to be configured to be long enough to cover the entire jitter window. However, this can increase the UE power consumption.
  • each packet for a PDU Set is transmitted separately as soon as possible after the packet arrives at gNB or UE; another is that all the packets for a PDU Set are transmitted as a whole after all packets arrive at gNB or UE.
  • the jitter for PDU Set should also be considered which is related to but different from the jitter for the packet.
  • An object of the present disclosure is to propose a wireless communication method and device.
  • an embodiment of the invention provides a wireless communication method, executable in a wireless communication device that serves as a receiver device, comprising: receiving packets of a protocol data unit (PDU) set for a service; and
  • PDU protocol data unit
  • an embodiment of the invention provides a wireless communication 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:
  • 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.
  • At least one embodiment of the disclosure provides a method to
  • FIG. 1 illustrates a schematic view 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 protocol layers of a transmitter device and a receiver device.
  • 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 another embodiment of the disclosure.
  • FIG. 6 illustrates a schematic view showing a wireless communication method according to another embodiment of the disclosure.
  • FIG. 7 illustrates a schematic view showing a wireless communication method according to another embodiment of the disclosure.
  • FIG. 8 illustrates a schematic view showing potential protocol stack models for XR service.
  • FIG. 9 illustrates a schematic view showing a real-time transport protocol (RTP) protocol data unit (PDU) .
  • RTP real-time transport protocol
  • FIG. 10 illustrates a schematic view showing transmitting time and receiving time of packets of a PDU set.
  • FIG. 11 illustrates a schematic view showing a new PDU type.
  • FIG. 12 is a block diagram of a system for wireless communication according to an embodiment of the present disclosure.
  • This invention disclosed a wireless communication method for processing extended reality (XR) traffic in extended reality (XR) service (s) .
  • XR service may include augmented reality (AR) , virtual reality (VR) , or mixed reality (MR) .
  • a packet may be a PDU or an SDU of a protocol layer.
  • packet may refer to a PDU or SDU
  • PDU may refer to a PDU or SDU.
  • a data unit being depended is referred to as a depended data unit, and a data unit depending on the depended data unit is referred to as a dependent data unit.
  • a DRB being depended is referred to as a depended DRB
  • a DRB depending on the depended DRB is referred to as a dependent DRB.
  • a PDU set being depended is referred to as a depended PDU set
  • a PDU set depending on the depended PDU set is referred to as a dependent PDU set.
  • a packet being depended is referred to as a depended packet, and a packet depending on the depended packet is referred to as a dependent packet.
  • a QoS flow being depended is referred to as a depended QoS flow, and a QoS flow depending on the depended QoS flow is referred to as a dependent QoS flow.
  • a sub-QoS flow being depended is referred to as a depended sub-QoS flow, and a sub-QoS flow depending on the depended sub-QoS flow is referred to as a dependent sub-QoS flow.
  • QoS quality of service
  • XR quality of service
  • a QoS flow is the finest granularity in the current QoS framework of 5GS.
  • dependencies between QoS flows are introduced.
  • PDU Set a concept named as “PDU Set” was introduced in the technical report (TR) 23.700-60 by 3GPP SA2.
  • a PDU Set is composed of one or more PDUs carrying a payload of one information unit generated at the application level (e.g., a frame or video slice for XR Services, as used in TR 26.926) .
  • the application level e.g., a frame or video slice for XR Services, as used in TR 26.926, .
  • all PDUs in a PDU Set are needed by the application layer to use the information unit.
  • the application layer can recover parts or all of the information unit, when some PDUs are missing.
  • a PDU set may be a group of packets or PDUs which can be decoded or processed as a whole unit at the Application layer.
  • XR traffic has some potential dependencies between packets of a PDU set and/or dependencies between PDU sets.
  • a service traffic stream of an XR service can comprise different types of PDU sets with different importance levels and QoS requirements.
  • one potential QoS framework enhancement is to extend the QoS-flow-based QoS framework.
  • a QoS Flow comprises multiple sub-QoS flows. The different types of PDU Sets of a QoS flow are mapped to different sub-QoS flows of the QoS Flow.
  • 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 11 b, 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, 11 b, 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, 11 b, 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 model of a transport network for XR service supported by 5G system.
  • a UE 10 is a 5G terminal which can support XR service and XR application and can be referred to as a client, a client terminal, or an XR client.
  • a gNB 20 is a 5G radio node or base station. 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 NG interface to a 5GC 300.
  • a UPF 30b is a UPF 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 transceiver 413 is operatively coupled with a connected processor, transmits and/or receives radio signals or wireline signals.
  • Each of the processors 411, 11a, 11 b, 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 the XR traffic flow.
  • the XR traffic flow may comprise one or more service traffic streams of the XR service.
  • the device executing the wireless communication method may comprise the UPF 30b, gNB 20, an XR server 41 in data network 40, or a UE.
  • the XR server 41 in data network 40 may operate as a transmitter device that executes a wireless communication method in some XR traffic delivery occasions, while one or more XR clients (e.g., one or more of the UE 10, UE 10a, and UE 10b) operates as the receiver device receiver the XR traffic flow sent from the transmitter device.
  • an XR client e.g., one or more of the UE 10, UE 10a, and UE 10b
  • 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 UPF/5GC may comprise another network entity of 5GC.
  • a service traffic stream 5 such as an XR stream of an XR service, is established between the UE 10 and the XR server 41.
  • the stream 5 comprises a traffic flow 51 from the XR server 41 to the UE 10 and a traffic flow 52 from the UE 10 to the XR server 41.
  • a layer such as an application layer, a PDCP layer, an RLC layer, a MAC layer, or physical layer (PHY layer or L1 layer)
  • a protocol layer entity may be implemented by a program, or a software module executed by a processor or implemented by a hardware module in an integrated circuit (IC) .
  • IC integrated circuit
  • transmitter device 10c an example of the transmitter device is shown as transmitter device 10c
  • receiver device 10d an example of the receiver device is shown as receiver device 10d.
  • the transmitter device 10c comprises a physical layer (PHY layer or L1 layer) 14c, MAC layer 15c, RLC layer 16c, PDCP layer 17c, RRC layer 18c, and application layer 19c.
  • the receiver device 10d comprises a physical layer (PHY layer or L1 layer) 14d, MAC layer 15d, RLC layer 16d, PDCP layer 17d, RRC layer 18d, and application layer 19d.
  • the layers in transmitter device 10c serve as transmitting protocol layer entities at the transmitting side
  • the layers in receiver device 10d serve as receiving protocol layer entities at the receiving side.
  • Embodiments of the disclosed may be implemented in the RRC layer, PDCP layer, RLC layer, MAC layer, or physical layer.
  • One or more steps (or blocks) in 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.
  • 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 the second. Since 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 packet delay budget (PDB) , packet error rate (PER) , packet loss rate (PLR) , frame error rate, frame delay budget, resolution, frame rate, and/or data rate.
  • PDB packet delay budget
  • PER packet error rate
  • PLR packet loss rate
  • one or more wireless communication devices execute an embodiment of the disclosed method for an XR service.
  • one wireless communication device serves as a receiver device.
  • the wireless communication device receives packets of a protocol data unit (PDU) set for a service, such as an extended reality (XR) service (A101) .
  • PDU protocol data unit
  • XR extended reality
  • the wireless communication device determines measurements of jitter of packets in the PDU set using timestamps in PDUs associated with the packets of the PDU set (A102) .
  • the receiver device receives the timestamp for each of the packets in the PDU Set from the real-time transport protocol (RTP) PDUs associated with the packets.
  • RTP real-time transport protocol
  • a PDU associated with a packet is a PDU carrying a payload of the packet. Packet is a more generic sense term while PDU is an encapsulated packet in a protocol layer.
  • the wireless communication device determines a jitter range of the PDU set based on the measurements of jitter of packets in the PDU set (A103) .
  • the wireless communication device configures ON duration of connected discontinuous reception (C-DRX) to cover the jitter range or determines the discarding or dropping of packets based on the the jitter range (A104) .
  • C-DRX connected discontinuous reception
  • a gNB 20 executes an embodiment of the disclosed method for an XR service.
  • the gNB 20 serves as a receiver device.
  • the gNB 20 receives packets of a protocol data unit (PDU) set for a service, such as an extended reality (XR) service (A101) .
  • PDU protocol data unit
  • XR extended reality
  • the gNB 20 determines measurements of jitter of packets in the PDU set using timestamps in PDUs associated with the packets of the PDU set (A102) .
  • the UPF 30b transmits the timestamp in a message to the gNB 20.
  • the message further comprises one or more the related information: T start , P, and n.
  • the wireless communication device is a network device of user plane function (UPF) and transmits the timestamp in the message to a base station.
  • UPF user plane function
  • the timestamp is a General Packet Radio Service Tunnelling Protocol-user plane (GTP-U) PDU for a packet or PDU of a PDU Set with an extension header which is used to carry the timestamp and the related information for the packet or PDU.
  • GTP-U General Packet Radio Service Tunnelling Protocol-user plane
  • the gNB 20 determines a jitter range of the PDU set based on the measurements of jitter of packets in the PDU set (A103) . In the embodiment, the base station calculates the jitter and jitter range accordingly.
  • the gNB 20 configures ON duration of connected discontinuous reception (C-DRX) to cover the jitter range (A104) and transmits configuration of the C-DRX to UE 10 (A105a) .
  • the UE 10 performs C-DRX according to the configuration of the C-DRX.
  • the UPF 30b executes an embodiment of the disclosed method for an XR service.
  • the UPF 30b serves as a receiver device.
  • the UPF 30b receives packets of a protocol data unit (PDU) set for a service, such as an extended reality (XR) service (A101) .
  • PDU protocol data unit
  • XR extended reality
  • the UPF 30b determines measurements of jitter of packets in the PDU set using timestamps in PDUs associated with the packets of the PDU set (A102) .
  • a transmitter device such as an XR server or an XR client, transmits the timestamp in a message to the UPF 30b.
  • the UPF 30b determines a jitter range of the PDU set based on the measurements of jitter of packets in the PDU set (A103) and transmits jitter range in a message to gNB 20 (A103a) .
  • the gNB 20 configures ON duration of connected discontinuous reception (C-DRX) to cover the jitter range (A104) and transmits configuration of the C-DRX to UE 10 (A105a) .
  • the UE 10 performs C-DRX according to the configuration of the C-DRX.
  • the wireless communication device is a network device of user plane function (UPF) and transmits the jitter range in the message to a base station.
  • the message carrying the jitter range is an NG Application Protocol (NG-AP) message.
  • the message carrying the jitter range is a General Packet Radio Service Tunnelling Protocol-user plane (GTP-U) PDU for a packet or PDU of a PDU Set with an extension header which is used to carry the jitter range and the related information for the packet or PDU.
  • the message carrying the jitter range is a message of PDU Session User Plane Protocol.
  • the message is a new-defined PDU comprising a field of the jitter range and a field of identifier for the PDU Set.
  • the UPF 30b executes an embodiment of the disclosed method for an XR service.
  • the UPF 30b serves as a receiver device.
  • the UPF 30b receives packets of a protocol data unit (PDU) set for a service, such as an extended reality (XR) service (A101) .
  • PDU protocol data unit
  • XR extended reality
  • the UPF 30b determines measurements of jitter of packets in the PDU set using timestamps in PDUs associated with the packets of the PDU set (A102) .
  • a transmitter device such as an XR server or an XR client, transmits the timestamp in a message to the UPF 30b.
  • the UPF 30b transmits the jitter in a message to the gNB 20 (A102a) .
  • the message further comprises one or more of the following related information:
  • the wireless communication device is a network device of user plane function (UPF) and transmits the jitter in the message to a base station.
  • the message carrying the timestamp is a General Packet Radio Service Tunnelling Protocol-user plane (GTP-U) PDU for a packet or PDU of a PDU Set with an extension header which is used to carry the jitter and the related information for the packet or PDU.
  • GTP-U General Packet Radio Service Tunnelling Protocol-user plane
  • the base station calculates the jitter range accordingly.
  • the gNB 20 receives the message and determines a jitter range of the PDU set based on the measurements of jitter of packets in the PDU set (A103) and transmits jitter range in a message to gNB 20 (A103a) .
  • the gNB 20 configures ON duration of connected discontinuous reception (C-DRX) to cover the jitter range (A104) and transmits configuration of the C-DRX to UE 10 (A105a) .
  • the UE 10 performs C-DRX according to the configuration of the C-DRX.
  • each of the measurements of jitter of packets in the PDU set is represented by jitter (i, j) and calculated using the formula:
  • S (i) is a transmitting time corresponding to a timestamp in a real-time transport protocol (RTP) PDU for a packet (i) when the packet (i) was transmitted from a transmitter device;
  • RTP real-time transport protocol
  • S (j) is a transmitting time corresponding to a timestamp in an RTP PDU for a packet (j) when the packet (j) was generated and/or transmitted from the transmitter device;
  • R (i) is a receiving time when the RTP PDU for the packet (i) was received at the receiver device;
  • R (j) is a receiving time when the RTP PDU for the packet (j) was received at the receiver device.
  • i and j are positive integer variables representing identifiers or sequence numbers (SNs) of the packets of the PDU set.
  • each of the measurements of jitter of packets in the PDU set is represented by jitter (i) and calculated using the formula:
  • S (i) is a transmitting time corresponding to a timestamp in a real-time transport protocol (RTP) PDU for a packet (i) when the packet (i) was transmitted from a transmitter device;
  • RTP real-time transport protocol
  • R (i) is a receiving time when the RTP PDU for the packet (i) was received at the receiver device;
  • S (i-1) is a transmitting time corresponding to a timestamp in an RTP PDU for a packet (i-1) when the packet (i-1) was transmitted from the transmitter device;
  • R (i-1) is a receiving time when the RTP PDU for the packet (i-1) was received at the receiver device;
  • the packet (i) is a packet next to the packet (i-1) ;
  • i is a positive integer variable representing an identifier or sequence number of the packet (i) in the packets of the PDU set.
  • each of the measurements of jitter of packets in the PDU set is represented by jitter (i) and calculated using the formula:
  • S (i) is a transmitting time corresponding to a timestamp in a real-time transport protocol (RTP) PDU for a packet (i) when the packet (i) was transmitted from a transmitter device;
  • RTP real-time transport protocol
  • R (i) is a receiving time when the RTP PDU for the packet (i) was received at the receiver device; i is a positive integer variable representing an identifier or sequence number of the packet (i) in the packets of the PDU set;
  • J ref is a pre-configured, predefined, or predicted reference jitter value for the PDU Set, or a measurement value for a special packet or PDU of the PDU Set.
  • J ref (R (1) -S (1) ) where the R (1) and S (1) are a transmitting time and a receiving time associated with the 1 st packet of the PDU Set.
  • the J ref is carried in an NG Application Protocol (NG-AP) message.
  • NG-AP NG Application Protocol
  • the J ref is carried in a General Packet Radio Service Tunnelling Protocol-user plane (GTP-U) PDU.
  • GTP-U General Packet Radio Service Tunnelling Protocol-user plane
  • the J ref is a part of jitter range related information that is included in a GTP-U extension header.
  • the J ref is carried in a message of PDU Session User Plane Protocol.
  • the message is a new-defined PDU comprising a field of the jitter range and a field of quality of service (QoS) flow identifier.
  • QoS quality of service
  • each of the measurements of jitter of packets in the PDU set is represented by jitter (i) and calculated using the formula:
  • R (i) is a receiving time when an RTP PDU for the packet (i) was received at the receiver device
  • i is a positive integer variable representing an identifier or sequence number of the packet (i) in the packets of the PDU set;
  • R p is a pre-configured or predefined receiving time, or a predicted receiving time.
  • the R p T start + n *P
  • T start is a reference start time that is pre-configured or a time when a 1 st PDU of a 1 st PDU set of the XR service was received at the receiver device;
  • P is periodicity of the PDU Set
  • n is a number of the PDU Set counted based on the reference start time or a pre-configured time.
  • the R p is carried in an NG Application Protocol (NG-AP) message.
  • NG-AP NG Application Protocol
  • the R p is carried in a General Packet Radio Service Tunnelling Protocol-user plane (GTP-U) PDU.
  • GTP-U General Packet Radio Service Tunnelling Protocol-user plane
  • the R p is a part of jitter range related information that is included in a GTP-U extension header.
  • the R p is carried in a message of PDU Session User Plane Protocol.
  • the message is a new-defined PDU comprising a field of the jitter range and a field of quality of service (QoS) flow identifier.
  • QoS quality of service
  • Jitter_range [Min_jitter, Max_jitter] ; wherein Min_jitter is a minimum value among the measurements of jitter for all the packets of the PDU Set. Max_jitter is a maximum value among the measurements of jitter for all the packets of the PDU Set.
  • the wireless communication device transmits the jitter range in a message.
  • the message further comprises one or more the of following related information:
  • the wireless communication device transmits jitter ranges of PDU sets of the XR service according to a periodicity which is an integer multiple of a principle periodicity of the PDU sets. In an embodiment, the wireless communication device transmits the jitter range of the PDU set when the jitter range is greater than a jitter range threshold.
  • FIG. 8 is an example of potential protocol stack models for XR service.
  • Real-time Transport Protocol RTP
  • RTCP Real-time Transport Control Protocol
  • RTCP Real-time Transport Control Protocol
  • the protocol provides measures for jitter compensation and detection of packet loss and out-of-order delivery, which are common, especially during PDU transmissions on an IP network.
  • the basic PDU of RTP is illustrated in FIG. 9. A field of the timestamp in each PDU can be used to calculate the delay and jitter by the receiver device.
  • the PDU Set and each packet of a PDU Set can be identified by network entities in 5GC, especially in UPF (e.g., UPF 30b) of 5GC (e.g., 5GC 300) . Identifying PDU Sets and the related packets can be realized using related information in the RTP PDUs that carry packets of the PDU Sets.
  • 5GC/UPF e.g., UPF 30b
  • UPF 30b can also obtain the timestamp or transmitting time for each PDU Set and the related packets based on the timestamp in the related RTP PDUs.
  • variables are defined in the following:
  • S (i) the transmitting time corresponding to a timestamp in an RTP PDU for the packet (i) when the packet (i) was generated and/or transmitted from the transmitter device.
  • S (j) the transmitting time corresponding to a timestamp in an RTP PDU for the packet (j) when the packet (j) was generated and/or transmitted from the transmitter device.
  • R (i) the receiving time when the RTP PDU for the packet (i) was received at the receiver device.
  • R (j) the receiving time when the RTP PDU for the packet (j) was received at the receiver device.
  • the jitter is defined as follows:
  • a receiver device can thus obtain jitter for each PDU set.
  • the jitter can be calculated using timestamps of adjacent packets or PDUs of the PDU Set.
  • the jitter can be defined as follows:
  • the packet (i) is a packet next to the packet (i-1) .
  • a receiver device can thus obtain jitter for each PDU set.
  • jitter for each PDU set may be obtained based on a pre-configured, predefined, or predicted reference jitter value for the PDU Set.
  • the jitter can be defined as follows:
  • J ref is a pre-configured, predefined, or predicted reference jitter value for the PDU Set, or a measurement value for a special packet or PDU of the PDU Set.
  • J ref (R (1) -S (1) ) where the R (1) and S (1) are a transmitting time and a receiving time associated with the 1 st packet of the PDU Set.
  • a receiver device can thus obtain jitter for each PDU set.
  • the jitter can be defined as follows:
  • a receiver device can thus obtain jitter for each PDU set.
  • the range of jitter can be defined as:
  • Jitter_range (n) [Min_jitter, Max_jitter]
  • Min_jitter the minimum value among the jitters for all the packets or PDUs of a PDU Set
  • Max_jitter the maximum value among the jitters for all the packets or PDUs of a PDU Set.
  • a receiver device can thus obtain a jitter range for each PDU set.
  • Embodiment 1 the jitter range measured in 5GC and delivered to RAN:
  • the jitter range for a PDU Set is measured/calculated in a network entity, such as UPF 30b, in 5GC according to the aforementioned embodiments and delivered to a network entity, such as gNB 20, in RAN. Additionally, one or more of the following related information are also delivered to RAN/gNB (e.g., gNB 20) along with the jitter range.
  • the network entity, such as UPF 30b, in the 5GC transmits the measured jitter range and/or the related information to the RAN/gNB (e.g., gNB 20) using an NG-AP message via the NG interface between 5GC/UPF (e.g., UPF 30b) and RAN/gNB (e.g., gNB 20) .
  • the RAN/gNB e.g., gNB 20
  • 5GC/UPF e.g., UPF 30b
  • RAN/gNB e.g., gNB 20
  • the network entity, such as UPF 30b, in the 5GC transmits the measured jitter range and/or the related information to the RAN/gNB (e.g., gNB 20) using a GTP-U PDU via NG interface between 5GC/UPF (e.g., UPF 30b) and RAN/gNB (e.g., gNB 20) .
  • the jitter range and the related information can be included in the GTP-U extension header.
  • the measured jitter range and the related information can be delivered to RAN/gNB (e.g., gNB 20) by PDU Session User Plane Protocol via NG interface between 5GC/UPF (e.g., UPF 30b) and RAN/gNB (e.g., gNB 20) .
  • 5GC/UPF e.g., UPF 30b
  • RAN/gNB e.g., gNB 20
  • a new PDU Type was disclosed as illustrated in FIG. 11.
  • the field “QoS Flow Identifier” can be other concept, such as sub-QoS flow identifier.
  • the delivery of the jitter range and the related information can be periodic according to a pre-configured periodicity, as an example, the periodicity can be an integer multiple of the principle periodicity of the PDU Set, i.e., the frame/rate;
  • the delivery of the jitter range and the related information can be based on the comparison with a pre-configured jitter range threshold for each PDU Set. The delivery occurs once the measured jitter range is greater than the jitter range threshold for each PDU Set.
  • Embodiment 2 the jitter range measured in RAN:
  • the jitter for each packet or PDU of a PDU Set is measured/calculated in 5GC/UPF (e.g., UPF 30b) according to aforementioned embodiments and then delivered to RAN/gNB (e.g., gNB 20) . Additionally, one or more of the following related information are also delivered to RAN/gNB (e.g., gNB 20) along with the jitter.
  • 5GC/UPF e.g., UPF 30b
  • the measured jitter for each packet or PDU can be delivered to RAN/gNB (e.g., gNB 20) by GTP-U PDU via the NG interface between 5GC/UPF (e.g., UPF 30b) and RAN/gNB (e.g., gNB 20) .
  • the jitter can be included in a GTP-U extension header.
  • Jitter_range for the PDU Set can be measured/calculated according to the aforementioned embodiments.
  • the timestamp or transmitting time for each packet or PDU of a PDU Set is obtained in 5GC/UPF (e.g., UPF 30b) according to the aforementioned embodiments and then delivered to RAN/gNB (e.g., gNB 20) . Additionally, one or more of the following related information are also delivered to RAN/gNB (e.g., gNB 20) along with the timestamp.
  • 5GC/UPF e.g., UPF 30b
  • the obtained timestamp or transmitting time for each packet or PDU can be delivered to RAN/gNB (e.g., gNB 20) using GTP-U PDU via NG interface between 5GC/UPF (e.g., UPF 30b) and RAN/gNB (e.g., gNB 20) .
  • the timestamp or transmitting time can be included in the GTP-U extension header.
  • the jitter for each packet or PDU can be measured/calculated in 5GC/UPF (e.g., UPF 30b) according to the aforementioned embodiments, and then the jitter_range for the PDU Set can be measured/calculated according to the aforementioned embodiments.
  • the RAN/gNB e.g., gNB 20
  • the UE 10 receives the configuration of the C-DRX cycle and performs C-DRX according to the configuration of the C-DRX cycle.
  • FIG. 12 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. 12 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.

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

Abstract

La présente invention concerne un procédé de communication sans fil. Un dispositif de communication sans fil sert de dispositif récepteur et exécute le procédé. Le dispositif reçoit des paquets d'un ensemble d'unités de données de protocole (PDU) pour un service, tel qu'un service de réalité étendue (XR), et détermine des mesures de gigue de paquets dans l'ensemble de PDU à l'aide d'estampilles temporelles dans les PDU associées aux paquets de l'ensemble de PDU. Le dispositif détermine en outre une plage de gigue de l'ensemble de PDU sur la base des mesures de gigue de paquets dans l'ensemble de PDU. La plage de gigue est utilisée pour la configuration de la durée de marche de la réception discontinue connectée (C-DRX) pour couvrir la plage de gigue.
PCT/CN2022/123729 2022-10-07 2022-10-07 Procédé et dispositif de communication sans fil WO2024073877A1 (fr)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109889398A (zh) * 2017-12-06 2019-06-14 中国移动通信有限公司研究院 一种检测媒体流业务质量的方法及装置、设备、存储介质
US20200107373A1 (en) * 2017-06-14 2020-04-02 Idac Holdings, Inc. Rach procedures in unlicensed spectrum
US20200382404A1 (en) * 2019-05-31 2020-12-03 Juniper Networks, Inc. Enhanced two-way active measurement protocol
DE102021120405A1 (de) * 2020-08-10 2022-02-10 Intel Corporation Mechanismus für erweiterte leistungsmessfunktion (pmf) mit jittermessung und steering-modus-verfahren

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20200107373A1 (en) * 2017-06-14 2020-04-02 Idac Holdings, Inc. Rach procedures in unlicensed spectrum
CN109889398A (zh) * 2017-12-06 2019-06-14 中国移动通信有限公司研究院 一种检测媒体流业务质量的方法及装置、设备、存储介质
US20200382404A1 (en) * 2019-05-31 2020-12-03 Juniper Networks, Inc. Enhanced two-way active measurement protocol
DE102021120405A1 (de) * 2020-08-10 2022-02-10 Intel Corporation Mechanismus für erweiterte leistungsmessfunktion (pmf) mit jittermessung und steering-modus-verfahren

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