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WO2020147019A1 - Appareil et procédé de réalisation d'une communication de groupe - Google Patents

Appareil et procédé de réalisation d'une communication de groupe Download PDF

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Publication number
WO2020147019A1
WO2020147019A1 PCT/CN2019/071826 CN2019071826W WO2020147019A1 WO 2020147019 A1 WO2020147019 A1 WO 2020147019A1 CN 2019071826 W CN2019071826 W CN 2019071826W WO 2020147019 A1 WO2020147019 A1 WO 2020147019A1
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WIPO (PCT)
Prior art keywords
group
connection
communication system
upf
smf
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Ceased
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PCT/CN2019/071826
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English (en)
Inventor
Jianhua Liu
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Guangdong Oppo Mobile Telecommunications Corp Ltd
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Guangdong Oppo Mobile Telecommunications Corp Ltd
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Application filed by Guangdong Oppo Mobile Telecommunications Corp Ltd filed Critical Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority to CN201980049322.6A priority Critical patent/CN112470543B/zh
Priority to PCT/CN2019/071826 priority patent/WO2020147019A1/fr
Publication of WO2020147019A1 publication Critical patent/WO2020147019A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/40—Connection management for selective distribution or broadcast
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/12—Setup of transport tunnels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/15—Setup of multiple wireless link connections

Definitions

  • the present disclosure relates to the field of communication systems, and more particularly, to an apparatus and a method of performing a group communication.
  • LTE long term evolution
  • NR new radio
  • a public network system such as, a public land network based on public land mobile network (PLMN)
  • PLMN public land mobile network
  • PLMN public land mobile network
  • Members in a local network group can communicate in a point-to-point manner or point-to-multipoint communication.
  • An object of the present disclosure is to propose an apparatus and a method of performing a group communication capable of providing a good group communication performance and high reliability and providing a solution that how a user data is transmitted within 5G system and corresponding control information and/or procedure.
  • a user equipment in a group communication includes a memory, a transceiver, and a processor coupled to the memory and the transceiver.
  • the processor is configured to control the transceiver to transmit, to a network node, a connection establishment request in the group communication system, and the processor is configured to establish, each connection for each group in the group communication system according to the connection establishment request.
  • a method for performing a group communication of a user equipment includes transmitting, to a network node, a connection establishment request in the group communication system and establishing, each connection for each group in the group communication system according to the connection establishment request.
  • a network node in a group communication includes a memory, a transceiver, and a processor coupled to the memory and the transceiver.
  • the processor is configured to control the transceiver to receive a connection establishment request from a user equipment (UE) in the group communication system, and the processor is configured to hand of a connection for the UE in the group communication system.
  • UE user equipment
  • a method for performing a group communication of a network node includes receiving a connection establishment request from a user equipment (UE) in the group communication system and handing of a connection for the UE in the group communication system.
  • UE user equipment
  • a non-transitory machine-readable storage medium has stored thereon instructions that, when executed by a computer, cause the computer to perform the above method.
  • a terminal device includes a processor and a memory configured to store a computer program.
  • the processor is configured to execute the computer program stored in the memory to perform the above method.
  • a network node includes a processor and a memory configured to store a computer program.
  • the processor is configured to execute the computer program stored in the memory to perform the above method.
  • FIG. 1 is a block diagram of a user equipment and a network performing a group communication according to an embodiment of the present disclosure.
  • FIG. 2 is a flowchart illustrating a method for performing a group communication of a user equipment according to an embodiment of the present disclosure.
  • FIG. 3 is a flowchart illustrating a method for performing a group communication of a network node according to an embodiment of the present disclosure.
  • FIG. 4 is a schematic diagram illustrating a 5G system architecture in a centralized user pane architecture case, using reference point representation illustrating how various network functions interact with each other according to an embodiment of the present disclosure.
  • FIG. 5 is a schematic diagram illustrating a 5G system architecture in a distributed user pane architecture case, using reference point representation illustrating how various network functions interact with each other according to an embodiment of the present disclosure.
  • FIG. 6 is a schematic diagram of exemplary illustration of point-to-multipoint communication user plane topologies according to an embodiment of the present disclosure.
  • FIG. 7 is a schematic diagram of exemplary illustration of point-to-multipoint communication group PDU session according to an embodiment of the present disclosure.
  • FIG. 8 is a block diagram of a system for wireless communication according to an embodiment of the present disclosure.
  • FIG. 1 illustrates that, in some embodiments, a user equipment (UE) 10 and a network node 20 performing a group communication according to an embodiment of the present disclosure are provided.
  • the UE 10 may include a processor 11, a memory 12, and a transceiver 13.
  • the network node 20 may include a processor 21, a memory 22 and a transceiver 23.
  • the processor 11 or 21 may be configured to implement proposed functions, procedures and/or methods described in this description. Layers of radio interface protocol may be implemented in the processor 11 or 21.
  • the memory 12 or 22 is operatively coupled with the processor 11 or 21 and stores a variety of information to operate the processor 11 or 21.
  • the transceiver 13 or 23 is operatively coupled with the processor 11 or 21, and the transceiver 13 or 23 transmits and/or receives a radio signal.
  • the processor 11 or 21 may include an application-specific integrated circuit (ASIC) , other chipsets, logic circuit and/or data processing devices.
  • the memory 12 or 22 may include a read-only memory (ROM) , a random access memory (RAM) , a flash memory, a memory card, a storage medium and/or other storage devices.
  • the transceiver 13 or 23 may include baseband circuitry to process radio frequency signals.
  • modules e.g., procedures, functions, and so on
  • the modules can be stored in the memory 12 or 22 and executed by the processor 11 or 21.
  • the memory 12 or 22 can be implemented within the processor 11 or 21 or external to the processor 11 or 21, in which those can be communicatively coupled to the processor 11 or 21 via various means are known in the art.
  • the communication between UEs relates to vehicle-to-everything (V2X) communication including vehicle-to-vehicle (V2V) , vehicle-to-pedestrian (V2P) , and vehicle-to-infrastructure/network (V2I/N) according to a sidelink technology developed under 3rd generation partnership project (3GPP) release 14, 15, and beyond.
  • UEs communicate with each other directly via a sidelink interface such as a PC5 interface.
  • the processor 11 is configured to control the transceiver 13 to receive transmit, to the network node 20, a connection establishment request in the group communication system, and the processor 11 is configured to establish, each connection for each group in the group communication system according to the connection establishment request.
  • the processor 11 is configured to establish multiple connections for multiple groups in the group communication system the UE 10 belongs to according to the connection establishment request.
  • each connection for each group in the group communication system is terminated at the network node 20 or the network node 20 and the processor 11 of the UE 10.
  • the connection establishment request is a protocol data unit (PDU) session establishment request
  • the PDU session establishment request includes a PDU session identity (ID) and/or group related information
  • the connection includes a PDU session.
  • PDU protocol data unit
  • the group related information includes a group index and a UE index within the group.
  • the connection is configured to a centralized user plane architecture using a session-and-service continuity (SSC) mode.
  • SSC session-and-service continuity
  • the processor 11 is configured to receive an IP address and/or prefix of the connection from the network node 20.
  • a connection type is an ethernet type PDU session.
  • the IP address and/or prefix of the connection is allocated to another UE of the another group communication system.
  • the processor 21 is configured to receive a connection establishment request from the user equipment (UE) 10 in the group communication system, and the processor 21 is configured to hand of a connection for the UE 10 in the group communication system.
  • the network node 20 further includes a session management function (SMF) configured to check whether the connection establishment request is compliant with a group the UE 10 belongs to.
  • the network node 20 further includes a protocol data unit session anchor (PSA) user plane function (UPF) configured to terminate each connection for the UE 10 in the group communication system.
  • the connection establishment request is a protocol data unit (PDU) session establishment request
  • the PDU session establishment request includes a PDU session identity (ID) and/or group related information
  • the connection includes a PDU session.
  • the group related information includes a group index and a UE index within the group.
  • the SMF is configured to retrieve and request to receive an update notification on the group related information from a unified data management (UDM) .
  • the SMF is configured to reject the connection establishment request if the group related information is not a part of explicitly groups the UE 10 belongs to according to a group data in the SMF requested from the UDM.
  • the connection is configured to a centralized user plane architecture using a session-and-service continuity (SSC) mode.
  • the network node 20 further includes an access and mobility management function (AMF) configured to consider group local configuration information if an appropriate SMF is selected for the group the UE 10 belongs to.
  • AMF access and mobility management function
  • the network node 20 further includes a UPF
  • the SMF is configured to consider group local configuration information if an appropriate UPF is selected for the group the UE belongs to.
  • the PSA UPF is configured to enforce a quality of experience (QoS) handling procedure for a group user data transmission in the group communication system, and a SMF based on local configuration or policy control function (PCF) information provides different QoS configurations for unicast and multicast communication.
  • QoS enforcement is different for an uplink and downlink traffic, and the SMF provides the different QoS configurations for the uplink and downlink traffic.
  • the SMF in case of multicast, provides a uniform QoS configuration for a downlink traffic target to different UEs in a group of the group communication system to the PSA UPF, and the PSA UPF enforces a uniform QoS policy for the downlink traffic to the different UEs in the group.
  • the SMF is configured to provide a packet detection rule (PDR) and a forwarding action rule (FAR) to the PSA UPF.
  • PDR packet detection rule
  • FAR forwarding action rule
  • the PDR includes group information and related FAR information
  • the FAR includes a destination interface information for the group.
  • the destination interface information includes a Nx interface or N6 interface associated with the group.
  • the PSA UPF detects a user data from one PDU session belonging to the group and detects that a destination address is an allocated address for other UE in the group, and the PSA UPF forwards the user data to the PDU session of an associated UE in the group.
  • the network node 20 further includes a serving UPF and other UPF, the connection for each group member UE is terminated at the serving UPF and the related UE.
  • the network node 20 further includes a SMF configured to configure the serving UPF as a PSA UPF for an associated UE, and the PSA UPF is an anchor point for the UE to connect with other UPF serving for other UEs within a group of the group communication system.
  • a connection type is an internet protocol version four (IPv4) , IPv6, or IPv4v6 PDU session
  • the processor 21 is configured to transmit, to the UE 10, an IP address and/or prefix of the connection.
  • the PSA UPF is an IP anchor point of the IP address and/or prefix allocated to the UE 10.
  • a connection type is an ethernet type PDU session.
  • the SMF instructs the UPF to route a downlink traffic based on a media access control (MAC) address used by the UE 10 for an uplink traffic.
  • MAC media access control
  • the SMF instructs the UPF to route a downlink traffic based on a media access control (MAC) address used by the UE 10 for an uplink traffic.
  • the IP address and/or prefix of the connection is allocated to another UE of the another group communication system.
  • FIG. 2 illustrates a method 200 for performing a group communication of a user equipment according to an embodiment of the present disclosure.
  • the method 200 includes: at block 202, transmitting, to a network node, a connection establishment request in the group communication system, and at block 204, establishing, each connection for each group in the group communication system according to the connection establishment request.
  • the method further includes establishing multiple connections for multiple groups in the group communication system the UE belongs to according to the connection establishment request. In some embodiments, the method further includes using the network node or the network node and the UE to terminate each connection for each group in the group communication system.
  • the connection establishment request is a protocol data unit (PDU) session establishment request
  • the PDU session establishment request includes a PDU session identity (ID) and/or group related information
  • the connection includes a PDU session.
  • PDU protocol data unit
  • the group related information includes a group index and a UE index within the group.
  • the connection is configured to a centralized user plane architecture using a session-and-service continuity (SSC) mode.
  • SSC session-and-service continuity
  • the method includes receiving an IP address and/or prefix of the connection from the network node.
  • a connection type is an ethernet type PDU session.
  • the IP address and/or prefix of the connection is allocated to another UE of the another group communication system.
  • FIG. 3 illustrates a method 300 for performing a group communication of a network node according to an embodiment of the present disclosure.
  • the method 300 includes: at block 302, receiving a connection establishment request from a user equipment (UE) in the group communication system, and at block 304, handing of a connection for the UE in the group communication system.
  • UE user equipment
  • the method further includes using a session management function (SMF) to check whether the connection establishment request is compliant with a group the UE belongs to.
  • the method further includes using a protocol data unit session anchor (PSA) user plane function (UPF) to terminate each connection for the UE in the group communication system.
  • SMF session management function
  • PSA protocol data unit session anchor
  • UPF user plane function
  • connection establishment request is a protocol data unit (PDU) session establishment request
  • PDU session establishment request includes a PDU session identity (ID) and/or group related information
  • the connection includes a PDU session.
  • group related information includes a group index and a UE index within the group.
  • the method further includes using the SMF to retrieve and request to receive an update notification on the group related information from a unified data management (UDM) .
  • the method further includes using the SMF to reject the connection establishment request if the group related information is not a part of explicitly groups the UE belongs to according to a group data in the SMF requested from the UDM.
  • the connection is configured to a centralized user plane architecture using a session-and-service continuity (SSC) mode.
  • SSC session-and-service continuity
  • the method further includes using an access and mobility management function (AMF) to consider group local configuration information if an appropriate SMF is selected for the group the UE belongs to.
  • AMF access and mobility management function
  • the method further includes using the SMF to consider group local configuration information if an appropriate UPF is selected for the group the UE belongs to.
  • the method further includes using the PSA UPF to enforce a quality of experience (QoS) handling procedure for a group user data transmission in the group communication system, and a SMF based on local configuration or policy control function (PCF) information provides different QoS configurations for unicast and multicast communication.
  • QoS quality of experience
  • PCF policy control function
  • a QoS enforcement is different for an uplink and downlink traffic
  • the SMF provides the different QoS configurations for the uplink and downlink traffic.
  • the method includes using the SMF to provide a uniform QoS configuration for a downlink traffic target to different UEs in a group of the group communication system to the PSA UPF, and the method further includes using the PSA UPF to enforce a uniform QoS policy for the downlink traffic to the different UEs in the group.
  • the method further includes using the SMF to provide a packet detection rule (PDR) and a forwarding action rule (FAR) to the PSA UPF.
  • PDR packet detection rule
  • FAR forwarding action rule
  • the method further includes the PDR includes group information and related FAR information, and the FAR includes a destination interface information for the group.
  • the destination interface information includes a Nx interface or N6 interface associated with the group.
  • the method in case of unicast communication, includes using the PSA UPF to detect a user data from one PDU session belonging to the group and detect that a destination address is an allocated address for other UE in the group, and the method further includes using the PSA UPF to forward the user data to the PDU session of an associated UE in the group.
  • the method further includes using a serving UPF and the related UE to terminate the connection for each group member UE. In some embodiments, the method further includes using a SMF to configure the serving UPF as a PSA UPF for an associated UE, and the PSA UPF is an anchor point for the UE to connect with other UPF serving for other UEs within a group of the group communication system.
  • a connection type is an internet protocol version four (IPv4) , IPv6, or IPv4v6 PDU session
  • the method includes transmitting, to the UE, an IP address and/or prefix of the connection.
  • the PSA UPF is an IP anchor point of the IP address and/or prefix allocated to the UE.
  • the method further includes a connection type is an ethernet type PDU session. In some embodiments, the method further includes for the ethernet type PDU session, the method includes using the SMF to instruct the UPF to route a downlink traffic based on a media access control (MAC) address used by the UE for an uplink traffic. In some embodiments, if the group communication system shares the connection with another group communication system, the IP address and/or prefix of the connection is allocated to another UE of the another group communication system.
  • MAC media access control
  • FIG. 4 illustrates that, in some embodiments, a 5G system architecture in a centralized user pane architecture case, uses reference point representation to illustrate how various network functions interact with each other according to an embodiment of the present disclosure.
  • the 5G system architecture is defined to support data connectivity and services enabling deployments to use techniques such as e.g. network function virtualization and software defined networking.
  • the 5G system architecture can leverage service-based interactions between control plane (CP) network functions where identified.
  • some technical solutions are to separate user plane (UP) functions from the control plane (CP) functions, allowing independent scalability, evolution, and flexible deployments e.g. centralized location or distributed (remote) location.
  • some technical solutions are to modularize a function design, e.g. to enable flexible and efficient network slicing.
  • some technical solutions are to wherever applicable, define procedures (i.e. a set of interactions between network functions) as services, so that their re-use is possible.
  • some technical solutions are to enable each network function to interact with other NF directly if required.
  • the architecture does not preclude the use of an intermediate function to help route control plane messages (e.g. like a DRA) .
  • some technical solutions are to minimize dependencies between an access network (AN) and a Core Network (CN) .
  • the architecture is defined with a converged core network with a common AN -CN interface which integrates different access Types e.g. 3GPP access and non-3GPP access.
  • some technical solutions are to support a unified authentication framework.
  • some technical solutions are to support "stateless” NFs, where the "compute” resource is decoupled from the "storage” resource.
  • some technical solutions are to support capability exposure.
  • some technical solutions are to support concurrent access to local and centralized services. To support low latency services and access to local data networks, UP functions can be deployed close to the access network.
  • some technical solutions are to support roaming with both home routed traffic as well as local breakout traffic in the visited public land mobile network (PLMN) .
  • PLMN public land mobile network
  • the 5G architecture is defined as service-based and the interaction between network functions is represented as follows.
  • a service-based representation where network functions (e.g. AMF) within the control plane enables other authorized network functions to access their services.
  • This representation also includes point-to-point reference points where necessary.
  • a reference point representation illustrates the interaction exist between the NF services in the network functions described by point-to-point reference point (e.g. N11) between any two network functions (e.g. AMF and SMF) .
  • Service-based interfaces and reference points are illustrated in FIG. 4. Network functions within the 5G core network control plane only uses service-based interfaces for their interactions.
  • the 5G system architecture includes following network functions (NF) , such as an authentication server function (AUSF) 401, an access and mobility management function (AMF) 402, a network slice selection function (NSSF) 403, a policy control function (PCF) 404, a session management function (SMF) 405, a unified data management (UDM) 406, a user plane function (UPF) 407, an application function (AF) 408, a user equipment (UE) , such as UE 1 409, UE 2 410, UE 3 411, a (radio) access network ( (R) AN) 412, a PSA UPF 413, and interfaces Uu, N1 to N15, and N22.
  • NF network functions
  • AUSF authentication server function
  • AMF access and mobility management function
  • NSSF network slice selection function
  • PCF policy control function
  • SMF session management function
  • UDM unified data management
  • UPF user plane function
  • AF application function
  • UE user equipment
  • a single SMF405 and a single PSA UPF 413 are responsible for all PDU sessions for 5GLAN group communication.
  • the PDU session for each group member UE is terminated at the PSA UPF 413.
  • the PSA UPF 413 is a user plane anchor point for a user plane path within the 5GLAN group. All traffic of participating 5GLAN group UE traverses the PSA UPF 413.
  • the PSA UPF 413 can be an anchor point for multiple 5GLAN groups.
  • the SMF 405 is responsible for managing the PDU sessions belonging to the 5GLAN group, including establish, modify, and release the PDU sessions, the PDU sessions are established (upon UE request) , modified (upon UE and 5GC request) and released (upon UE and 5GC request) as specified in clause 5.6.
  • the UE can provide a PDU session ID and the group related information. This PDU session is specific for the group.
  • the group related information can be combination of S-NSSAI and DNN, or internal Group index.
  • the SMF is responsible of checking whether the UE requests are compliant with the groups the UE belongs to.
  • SMF 405 retrieves and requests to receive update notifications on SMF level group data from the UDM 406.
  • group data may be group index and the UE index (e.g. GPSI) within the group.
  • the SMF 405 can reject a PDU session establishment if the group related information is not part of explicitly groups the UE belongs to according to the group data in the SMF 405 requested from the UDM 406.
  • a UE only establishes one PDU session for one group, and a UE may establish multiple PDU sessions for multiple groups the UE belongs to.
  • SSC Mode 1 may apply to PDU sessions for the centralized user plane architecture.
  • the PSA UPF 413 is IP anchor point of the IP address/prefix allocated to the UE.
  • the SMF 405 may instruct the PSA UPF 413 to route the DL traffic based on the MAC address (es) used by the UE for the UL traffic.
  • the SMF 405 performs IP address management and allocation procedure as specified in 5.8.2.2. Additionally, for IP type PDU session, the SMF 405 allocates one IP address/prefix to the UE during the 5GLAN group PDU session establishment procedure.
  • the SMF 405 can allocate the destination multicast address for the group and provide the multicast address to the UEs and the PSA UPF 413 in the group. If the SMF 405 does not allocate the destination multicast address, UE can use a wildcard address as the destination address for multicast in this group. In order to support unicast within 5GLAN, UE needs to know the destination address of the peer UE within 5GLAN group, this can be implemented by the application layer.
  • a SMF and UPF selection function when the SMF 405 is selected for 5GLAN group communication, the SMF selection function described in clause 6.3.2 for normal services.
  • the AMF 402 can also consider group local configuration information if any to select an appropriate SMF 405 for the group.
  • the UPF selection function described in clause 6.3.3 for normal services is applied.
  • the SMF 405 can also consider group local configuration information if any to select an appropriate UPF 407.
  • a QoS model defined in clause 5.7 is applied for 5GLAN communication.
  • the PSA UPF 413 enforces the QoS handling procedure for the group user data transmission.
  • the SMF based on local configuration or PCF information may provide different QoS configurations for unicast and multicast communication.
  • the QoS enforcement can be different for uplink and downlink traffic and the SMF 405 provides the different QoS configurations for uplink and downlink traffic.
  • the SMF 405 provides the uniform QoS configuration for the downlink traffic target to different UEs in the group to the PSA UPF 413 and the PSA UPF 413 enforces the uniform QoS policy for the downlink traffic to the different UEs in the group.
  • the PDU sessions targeting to the 5GLAN group compose the group user data forwarding path.
  • the SMF 405 provides the PDR and FAR to the PSA UPF 413.
  • the PDR contains the group information (e.g. group PDU Session ID or CN Tunnel info) and the related FAR information.
  • the FAR contains the destination interface (i.e. local forwarding) for the group and the destination interface information contains all the Nx interface or N6 interface associated with the group.
  • the PSA UPF 413 detects the user data from one PDU session belonging to the group and detects the destination address is for multicast, the PSA UPF 413 forwards the user data to the other PDU sessions of the group.
  • the PSA UPF 413 detects the user data from one PDU session belonging to the group and detects the destination address is the allocated address for other UE in the group, the PSA UPF 413 forwards the user data to the PDU Session of the associated UE in the group.
  • One CN tunnel is allocated for the PDU session between the other UPF (s) and the PSA UPF 413 if there are other UPF (s) between the UE and the PSA UPF 413, and this CN tunnel is specific for the group that the PDU session is associated.
  • the CN tunnel is released with the PDU session release.
  • the CN tunnel management for 5GLAN group is performed as specified in clause 5.8.2.10.
  • FIG. 5 illustrates that, in some embodiments, a 5G system architecture in a distributed user pane architecture case, uses reference point representation to illustrate how various network functions interact with each other according to an embodiment of the present disclosure.
  • the 5G system architecture includes following network functions (NF) , such as an authentication server function (AUSF) 501, an access and mobility management function (AMF) 502, a network slice selection function (NSSF) 503, a policy control function (PCF) 504, a session management function (SMF) 505, a unified data management (UDM) 506, a user plane function (UPF) 507, an application function (AF) 508, a user equipment (UE) , such as UE 1 509, a (radio) access network ( (R) AN) 512, a data network (DN) 514, and interfaces Uu, N1 to N15, N22, and Nx.
  • NF network functions
  • a single SMF 505 and multiple UPF (s) 507 are responsible for all the PDU sessions for 5GLAN group communication.
  • the PDU session for each group member UE is terminated at serving UPF and the related UE.
  • the SMF 505 can configure the serving UPF as the PSA UPF for the associated UE, and the PSA UPF is the anchor point for the UE to connect with other (PSA) UPF serving for other UEs within the group.
  • the SMF in a handling of PDU session for 5GLAN communication, is responsible for managing the PDU sessions belonging to the 5GLAN group, including establish, modify and release the PDU sessions, the PDU sessions are established (upon UE request) , modified (upon UE and 5GC request) and released (upon UE and 5GC request) .
  • the SMF 505 is responsible of checking whether the UE requests are compliant with the groups the UE belongs to. For this purpose, it retrieves and requests to receive update notifications on SMF level group data from the UDM 506.
  • the UE In a PDU session establishment request message sent to the network, the UE provides a PDU session ID and the group related information. This PDU session is specific for the group.
  • the group related information can be combination of S-NSSAI and DNN, or internal Group index.
  • the SMF 505 can reject a PDU session establishment if the group related information is not part of explicitly groups the UE belongs to according to the group data in SMF requested from the UDM 506.
  • a UE only establishes one PDU session for one group, and a UE may establish multiple PDU sessions for multiple groups the UE belongs to.
  • the PSA UPF is IP anchor point of the IP address/prefix allocated to the UE.
  • the SMF 505 may instruct the UPF 507 to route the DL traffic based on the MAC address (es) used by the UE for the UL traffic.
  • the SMF 505 performs IP address management and allocation procedure as specified in 5.8.2.2. Additionally, the SMF 505 allocates one IP address/prefix to the UE during the 5GLAN group PDU session establishment procedure.
  • the SMF 505 can allocate the destination multicast address for the group and provide the multicast address to the UEs in the group. If the SMF 505 does not allocate the destination multicast address, then a wildcard address can be used for the destination address for multicast in this group. In order to support unicast within 5GLAN, UE needs to know the destination address of the peer UE within 5GLAN group, this can be implemented by the application layer.
  • a SMF and UPF selection function when the SMF 505 is selected for 5GLAN group communication, the SMF selection function described in clause 6.3.2 for normal services.
  • the AMF 502 can also consider group local configuration information if any to select an appropriate SMF 505 for the group.
  • the UPF selection function described in clause 6.3.3 for normal services is applied.
  • the SMF 505 can also consider group local configuration information if any to select an appropriate UPF 507.
  • a QoS model defined in clause 5.7 is applied for 5GLAN communication.
  • the PSA UPF enforces the QoS handling procedure for the group user data transmission.
  • the SMF based on local configuration or PCF information may provide different QoS configurations for unicast and multicast communication.
  • the QoS enforcement can be different for uplink and downlink traffic and the SMF 505 provides the different QoS configurations for uplink and downlink traffic.
  • the SMF 505 provides the uniform QoS configuration for the downlink traffic target to different UEs in the group to the PSA UPF and the PSA UPF enforces the uniform QoS policy for the downlink traffic to the different UEs in the group.
  • the PDU sessions for the UEs in the group, the CN tunnel on Nx interface for this group compose the group user data forwarding path.
  • the SMF 505 is responsible for establishing and managing the CN tunnels on Nx interface between the different PSA UPF for the different UEs within 5GLAN group.
  • the SMF 505 provides the all the CN tunnel information to each PSA UPF within the group and update the CN tunnel information if the CN tunnel is changed due to e.g. PDU session (s) established or released for the group.
  • the SMF 505 configures each PSA UPF the PDR and FAR.
  • the PDR contains the group information (e.g.
  • the FAR contains the destination interface for the group and the destination interface information contains all the Nx interface or N6 interface associated with the group.
  • the PDU sessions and the CN tunnel is specific for the group.
  • the PSA UPF of the transmitting UE detects the user data from one PDU Session associated to the group and detects the destination address is for multicast, the PSA UPF forwards the user data to all the other PSA UPF (s) according to the configured CN tunnel information for the group.
  • the other PSA UPF (s) forwards the use data to the PDU sessions associated to the group.
  • PDR table and FAR table are illustrated as follows.
  • a PSA UPF of a transmitting UE detects a user data from one PDU session associated to a group and detects that a destination address is an address for other UE in the other (PSA) UPF in the group, the PSA UPF forwards the user data to the (PSA) UPF via Nx interface.
  • a SMF provides all the UE addresses in the group to each PSA UPF in the group, and PSA UPF information (e.g. CN tunnel info) of each address is associated (the PDU session with the address is terminated) .
  • PSA UPF information e.g. CN tunnel info
  • the PSA UPF of the transmitting UE detects the user data from one PDU session associated to the group and detects that the destination address is the address for other UE in this (PSA) UPF in the group, the PSA UPF forwards the user data to PDU Session to the destination UE.
  • PSA this
  • the PSA UPF of the transmitting UE detects the user data from one PDU session associated to the group, the PSA UPF forwards the user data to all the other PSA UPF (s) according to the configured CN tunnel information for the group.
  • the other PSA UPF (s) detect the destination address of the user data and if the destination address is the address for the PDU session terminated to itself, the PSA UPF (s) forward the user data to the PDU session; otherwise, the PSA UPF (s) discard the user data.
  • FIGS. 6 to 7 illustrate that, in some embodiments, point-to-multipoint group communication is provided.
  • group specific packet data network (PDU) session is introduced.
  • Fifth generation system (5GS) can support a group specific PDU session establishment, release, modify along with the group/group member addition or removal.
  • session management function (SMF) node 108 is responsible for group specific PDU session management.
  • Different members in the group can be served by same user plane function (UPF) node such as a UPF1 node 106 or different UPF nodes such as the UPF1 node 106 and a UPF2 node 112.
  • UPF user plane function
  • UE-T 102 is a transmitter UE while UE-R1 104 and UE-R2 110 are the receiver UEs, in which UE-T 102 and UE-R1 104 are served by same UPF1 node 106, UE-R2 110 are served by UPF2 node 112.
  • Data from UE-T 102 is transmitted within fifth generation system (5GS) and routed by UPF nodes such as UPF1 node 106 and UPF2 node 112.
  • 5GS fifth generation system
  • the group specific PDU session is terminated at the member and the serving UPF.
  • a group is established by one application function (AF) or one UE
  • AF application function
  • a group specific PDU session is established for each group member who is added into the group with the group creation.
  • the SMF node 108 is enhanced to support the group-based PDU session management function, including group-based PDU session establishment.
  • the group specific PDU session is established for a new joined member.
  • the SMF node 108 is responsible for establishing a routing tunnel between the UPF node serving the new joined member and the UPF nodes serving the authorized transmitting members.
  • this procedure describes the one to many communications PDU session establishment procedure. It is understood that one group is managed by a same SMF. The group creation and group member joining procedure is based on other solution and not mentioned in this solution. This embodiment is an example, and the present disclosure is not limited thereto.
  • group specific PDU session establishment request including the request S-NSSAI, group information, etc.
  • group information could be e.g. group index, group specific data network name (DNN) information, or group specific application server information.
  • SMF node 108 After receiving the request from UE-T 102, SMF node 108 selects the UPF1 node 106 as the serving UPF for the specific group based on the S-NSSAI information and group information. SMF node 108 sends session establishment request to UPF1 node 106, including the allocated core network (CN) tunnel information on N3 interface. UPF1 node 106 acknowledges by sending session establishment response message. SMF node 108 sends PDU session accept to the UE-T 102. In case of PDU session type IPv4 or IPv6 or IPv4v6, the SMF node 108 allocates an IP address/prefix for the PDU Session, and the address/prefix is for the group specific. Alternatively, if the group shares the PDU session with other groups, a group specific address is also allocated to at least one UE of other groups.
  • PDU session type IPv4 or IPv6 or IPv4v6 the SMF node 108 allocates an IP address/prefix for the
  • UE-R2 110 When UE-R2 110 is added into the group, UE-R2 110 initiates PDU session establishment request to the SMF node 108, including S-NSSAI information and group information.
  • SMF node 108 selects UPF2 node 112 as the serving UPF for UE-R2 110, and determines to establish a routing tunnel between UPF1 node 106 serving UE-T 102 and the UPF2 node 112.
  • SMF node 108 sends session establishment request to UPF2 node 112, including the allocated CN tunnel information, the CN tunnel information includes the UPF2 address of the tunnel between UPF1 node 106 and UPF2 node 112 and the UPF2 address of N3 tunnel.
  • UPF2 node 112 acknowledges by sending session establishment response message.
  • SMF node 108 establishes routing tunnel between UPF1 node 106 and UPF2 node 112, and provides the UPF2 address of the tunnel between UPF1 node 106 and UPF2 node 112 to UPF1 node 106. Also, SMF node 108 provides the association information of this routing tunnel and PDU session for UE-T 102. SMF node 108 sends PDU session accept to UE-R2 110. In case of PDU session type IPv4 or IPv6 or IPv4v6, the SMF node 108 allocates an IP address/prefix for the PDU session, and the address/prefix is the group specific for UE-R2 110. If there is existing PDU session for another group for UE-R2 110, the existing PDU Session can be re-used for a newly joined group, i.e. multiple groups can share one PDU session for the receiving member in the group.
  • UE-T 102 sends the group data to the UPF1 node 106, UPF1 node determines the receiving UE-R1 104, UE-R2 110 according to the routing association information provided at block 8 and routes the data to the tunnel corresponding to UE-R1 104 and UE-R2 110 respectively. If PDU session is shared by multiple groups, UPF 1 node 106 determines the receiving UE-R1 104, UE-R2 110 according to the group specific address information to obtain the group information.
  • FIG. 8 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. 8 illustrates the system 700 including a radio frequency (RF) circuitry 710, a baseband circuitry 720, an application circuitry 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 at least as illustrated.
  • RF radio frequency
  • the application circuitry 730 may include a 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 baseband circuitry 720 may include a circuitry, such as, but not limited to, one or more single-core or multi-core processors.
  • the processors may include a baseband processor.
  • the baseband circuitry may handle various radio control functions that enable communication with one or more radio networks via the RF circuitry.
  • 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 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
  • multi-mode baseband circuitry Embodiments in which the baseband circuitry is configured to support radio communications of more than one wireless protocol.
  • 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 RF circuitry 710 may enable communication with wireless networks using modulated electromagnetic radiation through a non-solid medium.
  • the RF circuitry may include switches, filters, amplifiers, etc. to facilitate the communication with the wireless network.
  • the RF circuitry 710 may include circuitry to operate with signals that are not strictly considered as being in a radio frequency.
  • RF circuitry may include circuitry to operate with signals having an intermediate frequency, which is between a baseband frequency and a radio frequency.
  • the transmitter circuitry, control circuitry, or receiver circuitry discussed above with respect to the user equipment, eNB, or gNB may be embodied in whole or in part in one or more of the RF circuitry, the baseband circuitry, and/or the application circuitry.
  • “circuitry” may refer to, be part of, or include an Application Specific Integrated Circuit (ASIC) , an electronic circuit, a processor (shared, dedicated, or group) , and/or a memory (shared, dedicated, or group) that execute one or more software or firmware programs, a combinational logic circuit, and/or other suitable hardware components that provide the described functionality.
  • ASIC Application Specific Integrated Circuit
  • the electronic device circuitry may be implemented in, or functions associated with the circuitry may be implemented by, one or more software or firmware modules.
  • some or all of the constituent components of the baseband circuitry, the application circuitry, and/or the memory/storage may be implemented together on a system on a chip (SOC) .
  • SOC system on a chip
  • the memory/storage 740 may be used to load and store data and/or instructions, for example, for system.
  • the memory/storage for one embodiment may include any combination of suitable volatile memory, such as dynamic random access memory (DRAM) ) , and/or non-volatile memory, such as flash memory.
  • DRAM dynamic random access memory
  • flash memory non-volatile memory
  • the I/O interface 780 may include one or more user interfaces designed to enable user interaction with the system and/or peripheral component interfaces designed to enable peripheral component interaction with the system.
  • User interfaces may include, but are not limited to a physical keyboard or keypad, a touchpad, a speaker, a microphone, etc.
  • Peripheral component interfaces may include, but are not limited to, a non-volatile memory port, a universal serial bus (USB) port, an audio jack, and a power supply interface.
  • USB universal serial bus
  • the sensor 770 may include one or more sensing devices to determine environmental conditions and/or location information related to the system.
  • the sensors may include, but are not limited to, a gyro sensor, an accelerometer, a proximity sensor, an ambient light sensor, and a positioning unit.
  • the positioning unit may also be part of, or interact with, the baseband circuitry and/or RF circuitry to communicate with components of a positioning network, e.g., a global positioning system (GPS) satellite.
  • GPS global positioning system
  • the display 750 may include a display, such as a liquid crystal display and a touch screen display.
  • 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.
  • system may have more or less components, and/or different architectures.
  • 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.
  • an apparatus and a method of performing a group communication capable of providing a good group communication performance and high reliability and providing a solution that how a user data is transmitted within 5G system and corresponding control information and/or procedure are provided.
  • 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 units as separating components for explanation are or are not physically separated.
  • the units for display are or are not physical units, that is, located in one place or distributed on a plurality of network units. Some or all of the units are used according to the purposes of the embodiments.
  • each of the functional units in each of the embodiments can be integrated in one processing unit, physically independent, or integrated in one processing unit with two or more than two units.
  • 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)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un appareil et un procédé permettant de réaliser une communication de groupe. Un procédé permettant réaliser la communication de groupe d'un équipement utilisateur consiste à transmettre, à un nœud de réseau, une demande d'établissement de connexion dans le système de communication de groupe et à établir chaque connexion pour chaque groupe dans le système de communication de groupe selon la demande d'établissement de connexion.
PCT/CN2019/071826 2019-01-15 2019-01-15 Appareil et procédé de réalisation d'une communication de groupe Ceased WO2020147019A1 (fr)

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