WO2023006042A1 - Dispositif et procédé de communication en multidiffusion - Google Patents

Dispositif et procédé de communication en multidiffusion Download PDF

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Publication number
WO2023006042A1
WO2023006042A1 PCT/CN2022/108671 CN2022108671W WO2023006042A1 WO 2023006042 A1 WO2023006042 A1 WO 2023006042A1 CN 2022108671 W CN2022108671 W CN 2022108671W WO 2023006042 A1 WO2023006042 A1 WO 2023006042A1
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network element
ethernet
message
multicast
packet
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PCT/CN2022/108671
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English (en)
Chinese (zh)
Inventor
朱强华
吴问付
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华为技术有限公司
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Publication of WO2023006042A1 publication Critical patent/WO2023006042A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
    • H04W4/08—User group management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup

Definitions

  • the embodiments of the present application relate to the field of wireless communication, and in particular, to a multicast communication method and device.
  • the fifth generation (5th generation, 5G) mobile communication system can provide 5G local area network (5G local area network, 5GLAN) service, which can provide network protocol (internet protocol) for two or more terminal devices in a group of terminal devices.
  • 5G local area network 5GLAN
  • IP internet protocol
  • non-IP type for example, Ethernet type
  • 5GLAN services can be applied to scenarios such as home communication, corporate office, factory manufacturing, Internet of Vehicles, power grid transformation, and public security agencies.
  • terminal devices can join a 5GLAN group due to business requirements or proprietary attributes, and two terminal devices in the 5GLAN group can use 5GLAN services to communicate with each other.
  • the two terminal devices cannot use the 5GLAN service to communicate.
  • multiple devices in a factory can form a 5GLAN group, and two devices in the 5GLAN group can use 5GLAN services to send Ethernet data packets to each other; , computers, laptops) etc. form a 5GLAN group, and two office devices in the 5GLAN group can use 5GLAN services to send IP data packets to each other.
  • 5GLAN services can support Ethernet-type multicast communication.
  • a terminal device can send an Ethernet-type multicast message to one or more terminal devices, and the user plane function (user plane function, UPF) network element receives the Ethernet-type multicast message Afterwards, the Ethernet-type multicast message can be distributed to one or more specified terminal devices according to the Ethernet multicast address included in the Ethernet-type multicast message.
  • UPF user plane function
  • Embodiments of the present application provide a multicast communication method and device to solve the problem of how a terminal device joins or exits an Ethernet-type multicast group.
  • an embodiment of the present application provides a multicast communication method, the method includes: a session management network element receives an Ethernet PDU session establishment message from a first terminal device, and the Ethernet PDU session establishment message is used to request establishment of a first Ethernet PDU session.
  • the session management network element sends the first processing rule corresponding to the first Ethernet PDU session to the user plane network element, and the first processing rule is used to instruct the user plane network element to process the A message of the first type received, the message of the first type is used for the first terminal device to request to join or exit the multicast group of the Ethernet type, and the first processing rule includes a first message detection rule and A first packet processing rule, where the first packet detection rule is used to detect the first type of packet, and the first packet processing rule is used to instruct to report all detected packets to the session management network element The first type of message described above.
  • the session management network element can send the first processing rule corresponding to the first Ethernet PDU session to the user plane network element after receiving the Ethernet PDU session establishment message of the first terminal device, so that the user plane network element can receive the first processing rule corresponding to the first Ethernet PDU session.
  • the report of the first type of message to the session management network element can be realized, and then the first terminal device can join or exit the Ethernet type multicast group.
  • the first packet detection rule includes one or more of the following: an IP packet filter, used to instruct the user plane network element to detect an indication of the first type of packet information, or an Ethernet packet filter embedded with an IP packet filter.
  • the method further includes: the session management network element receiving first indication information from the user plane network element, where the first indication information includes a first message or a message generated according to the first message. N4 report, the first message indicates that the first terminal device requests to join the first multicast group, the first message is the first type of message, and the first multicast group is the A multicast group of the Ethernet type; the session management network element sends the second processing rule corresponding to the first Ethernet PDU session to the user plane network element, and the second processing rule is the first multicast group
  • the second packet processing rule is used to control the forwarding of the Ethernet multicast packets of the first multicast group.
  • the session management network element can send the second processing rule corresponding to the first Ethernet PDU session to the user plane network element in time, so that the user plane network element realizes the grouping of the first multicast group. forwarding control of the broadcast message, and at the same time realize that the first terminal device joins the first multicast group.
  • the session management network element acquires the The multicast address of one or more Ethernet multicast groups that the device is allowed to join.
  • the session management network element determines that the multicast addresses of one or more Ethernet-type multicast groups that the first terminal device is allowed to join include the multicast address of the first multicast group, and the session management network element generates The second processing rule.
  • the session management network element can determine whether to allow the first terminal device to join the first multicast group before generating the second processing rule, and generate the second processing rule when it is determined that the first terminal device is allowed to join the first multicast group .
  • the session management network element acquires at least one multicast group
  • the information of each multicast group includes an identifier of at least one terminal device.
  • the session management network element determines that the at least one multicast group includes the first multicast group, and the information of the first multicast group includes the identifier of the first terminal device, and the session management network element generates The second processing rule.
  • the session management network element can determine whether to allow the first terminal device to join the first multicast group before generating the second processing rule, and generate the second processing rule when it is determined that the first terminal device is allowed to join the first multicast group .
  • the first indication information includes the IP multicast address of the first multicast group; the session management network element maps the IP multicast address of the first multicast group to the The Ethernet multicast address of the first multicast group.
  • the session management network element maps the IP multicast address of the first multicast group to the Ethernet multicast address of the first multicast group, so that the session management network element generates the second multicast address according to the Ethernet multicast address of the first multicast group.
  • the first indication information when the first indication information is the N4 report generated according to the first packet, the first indication information includes the Ethernet multicast address of the first multicast group.
  • the session management function network element sends second indication information to the user plane network element, where the second indication information is used to indicate that the user plane network element will
  • the IP multicast address acquired by the first type of message is mapped to an Ethernet multicast address.
  • the session management network element may instruct the user plane network element to map the IP multicast address obtained from the detected first type of message to an Ethernet multicast address.
  • the session management network element receives third indication information from the user plane network element, where the third indication information includes a second message or an N4 report generated according to the second message, The second message indicates that the first terminal device requests to withdraw from the first multicast group, and the second message is a message of the first type.
  • the session management network element sends fourth indication information to the user plane network element, where the fourth indication information is used to instruct the user plane network element to delete the second processing rule.
  • the session management network element after receiving the third instruction information, can instruct the user plane network element to delete the second processing rule in time, and at the same time, the first terminal device can withdraw from the first multicast group.
  • the method further includes: the session management network element acquiring fifth indication information, where the fifth indication information is used to indicate that the first terminal device supports the multicast management protocol.
  • the session management network element sends the first processing rule corresponding to the first Ethernet PDU session to the user plane network element
  • the session management network element sends the user plane network element the The first processing rule corresponding to the first Ethernet PDU session.
  • the session management network element may adopt but not limited to the following methods to obtain the fifth indication information:
  • the session management network element obtains the fifth indication information from the first terminal device; or, the session management network element obtains the fifth indication information from a unified data management network element or a policy control function network element or a data network authentication, authorization, and charging
  • the server acquires the fifth indication information.
  • the first type of message includes an IGMP message or an MLD message.
  • the embodiment of the present application provides a multicast communication method, the method including:
  • the user plane network element receives the first processing rule of the first Ethernet PDU session from the session management function network element, the first Ethernet PDU session is an Ethernet PDU session requested by the first terminal device, and the first processing rule is used for The user plane network element processes the first type of message received from the first terminal device, and the first type of message is used for the first terminal device to request to join or exit an Ethernet type multicast group,
  • the first processing rule includes a first packet detection rule and a first packet processing rule, the first packet detection rule is used to detect a first type of packet, and the first packet processing rule is used to The session management network element reports the detected packet of the first type;
  • the user plane network element receives a first packet from the first terminal device, and the first packet indicates that the first A terminal device requests to join a first multicast group, the first message is a message of the first type, and the first multicast group is a multicast group of the Ethernet type;
  • the user plane network element determines The first packet matches the first packet detection rule, and sends first indication information to the session
  • the user plane network element After receiving the first processing rule corresponding to the first Ethernet PDU session, if the user plane network element receives the first packet, the user plane network element matches the first packet with the first packet detection rule , when the first packet matches the first packet detection rule, send the first indication information to the session management network element according to the first packet processing rule, so that the session management network element configures the first Ethernet PDU session for the user plane network element
  • the corresponding second processing rule implements that the first terminal device joins an Ethernet-type multicast group.
  • the N4 report generated according to the first message includes the Ethernet multicast address of the first multicast group; the user plane network element will obtain the The IP multicast address of the first multicast group is mapped to the Ethernet multicast address of the first multicast group.
  • the user plane network element receives second indication information from the session management function network element, where the second indication information is used to indicate that the user plane network element will, according to the detected The IP multicast address acquired by the first type of message is mapped to an Ethernet multicast address.
  • the user plane network element can map the IP multicast group address of the first multicast group obtained from the first packet to the Ethernet multicast address of the first multicast group according to the second indication information.
  • the user plane network element after the user plane network element sends the first indication information to the session management function network element, the user plane network element receives the The second processing rule corresponding to the first Ethernet PDU session; wherein, the second processing rule is the routing rule of the Ethernet multicast packet of the first multicast group, and the second processing rule includes a second packet detection rule and a second packet processing rule, the second packet detection rule is used to detect the Ethernet multicast packet of the first multicast group, and the second packet processing rule is used to control the first group Forwarding of Ethernet multicast packets of the multicast group.
  • the user plane network element receives a second message from the first terminal device, the second message indicates that the first terminal device requests to withdraw from the first multicast group, and the The second packet is the packet of the first type.
  • the user plane network element determines that the second packet matches the first packet detection rule, and sends third indication information to the session management function network element according to the first packet processing rule, and the first packet detection rule
  • the third indication information includes the second message or the N4 report generated according to the second message.
  • the user plane network element After receiving the first processing rule corresponding to the first Ethernet PDU session, if the user plane network element receives the second message, the user plane network element matches the second message with the first message detection rule , when the second packet matches the first packet detection rule, send third indication information to the session management network element according to the first packet processing rule, so as to enable the first terminal device to withdraw from the first multicast group.
  • the N4 report generated according to the second message includes the Ethernet multicast address of the first multicast group; the user plane network element will obtain the The IP multicast address of the first multicast group is mapped to the Ethernet multicast address of the first multicast group.
  • the user plane network element after the user plane network element sends the N4 report generated according to the second message to the session management function network element, the user plane network element receives the Fourth instruction information of the management function network element, where the fourth instruction information instructs the user plane network element to delete the second processing rule.
  • the first packet detection rule includes one or more of the following: an IP packet filter, used to instruct the user plane network element to detect an indication of the first type of packet information, or an Ethernet packet filter embedded with an IP packet filter.
  • the first type of message includes an IGMP message or an MLD message.
  • the embodiment of the present application provides a multicast communication method, the method comprising:
  • the session management network element receives the Ethernet PDU session establishment message from the first terminal device, and the Ethernet PDU session establishment message is used to request establishment of the first Ethernet PDU session; the session management network sends the first Ethernet session to the user plane network element A third processing rule corresponding to the PDU session; the third processing rule is used by the user plane network element to process the first type of message received from the first terminal device, and the third processing rule includes a third message A message detection rule and a third message processing rule, the third message detection rule is used to detect the first type of message, and the first type of message is used by the first terminal device to request to join or Exit the multicast group of the Ethernet type, the third packet processing rule is used to manage the fourth processing rule associated with the detected packet of the first type, and the fourth processing rule is used to indicate the
  • the user plane network element processes an Ethernet multicast packet of an Ethernet type multicast group associated with the detected first type of packet.
  • the session management network element can send the third processing rule corresponding to the first Ethernet PDU session to the user plane network element after receiving the Ethernet PDU session establishment message of the first terminal device, so that the user plane network element can receive the third processing rule corresponding to the first Ethernet PDU session.
  • the fourth processing rule associated with the detected first type of message can be managed according to the third processing rule, and then the first terminal device can implement the first terminal device to join or exit Ether type multicast group.
  • the fourth processing rule is a routing rule for an Ethernet multicast packet of an Ethernet type multicast group associated with the detected first type of packet
  • the fourth processing rule is The four processing rules include a fourth packet detection rule and a fourth packet processing rule, the fourth packet detection rule is used to detect the Ethernet type multicast associated with the detected first type of packet group of Ethernet multicast packets, and the fourth packet processing rule is used to control the processing of the Ethernet multicast packets of the Ethernet type multicast group associated with the detected first type of packets Forward;
  • the fourth processing rule is a media access control MAC address forwarding table of an Ethernet-type multicast group associated with the detected packet of the first type.
  • the third packet detection rule includes one or more of the following:
  • An IP packet filter used to instruct the user plane network element to detect the indication information of the first type of packet, or an Ethernet packet filter embedded with an IP packet filter.
  • the session management network element sends access control information to the user plane network element, where the access control information indicates at least one Ethernet-type multicast session that the first terminal device is allowed to join Group.
  • the access control information includes the multicast address of the at least one Ether-type multicast group; or, the access control information includes the address of the at least one Ether-type multicast group information.
  • the user plane network element can judge whether to allow the first terminal device to join or exit the Ethernet type multicast group.
  • it also includes:
  • the session management network element acquires fifth indication information, where the fifth indication information is used to indicate that the first terminal device supports a multicast management protocol.
  • the session management network element sends the third processing rule corresponding to the first Ethernet PDU session to the user plane network element
  • the session management network element sends the third processing rule to the user plane network element according to the fifth indication information
  • the session management network element may adopt but not limited to the following methods to obtain the fifth indication information:
  • the session management network element obtains the fifth indication information from the first terminal device; or, the session management network element obtains the fifth indication information from a unified data management network element or a policy control function network element or a data network authentication, authorization, and charging
  • the server acquires the fifth indication information.
  • the first type of message includes an IGMP message or an MLD message.
  • the embodiment of the present application provides a multicast communication method, the method comprising:
  • the user plane network element receives a third processing rule corresponding to the first Ethernet PDU session from the session management network element, and the first Ethernet PDU session is an Ethernet PDU session requested by the first terminal device to be established; the third processing rule is used for The user plane network element processes the first type of packet received from the first terminal device, the third processing rule includes a third packet detection rule and a third packet processing rule, and the third packet A detection rule is used to detect the first type of message, and the third message processing rule is used to manage a fourth processing rule associated with the detected first type of message, and the fourth The processing rule is used to instruct the user plane network element to process the Ethernet multicast message of the Ethernet type multicast group associated with the detected first type of message; A first message of the first terminal device, the first message indicates that the first terminal device requests to join the first multicast group, the first message is the first type of message, and the The first multicast group is the multicast group of the Ethernet type; the user plane network element determines that the first packet matches the third packet detection rule, and uses all the information obtained from the
  • the user plane network element manages the fourth processing associated with the first packet according to the third packet processing rule and the Ethernet multicast address of the first multicast group rule, the user plane network element creates a routing rule for the Ethernet multicast packet of the first multicast group according to the third packet processing rule and the Ethernet multicast address of the first multicast group, so
  • the routing rule of the Ethernet multicast packet of the first multicast group includes the packet detection rule of the Ethernet multicast packet of the first multicast group and the packet detection rule of the Ethernet multicast packet of the first multicast group Text processing rules, the packet detection rules of the Ethernet multicast packets of the first multicast group are used to detect the Ethernet multicast packets of the first multicast group, and the Ethernet multicast packets of the first multicast group
  • the message processing rule of the message is used to control the forwarding of the Ethernet multicast message with the first multicast group.
  • the first terminal device can join the first multicast group.
  • the user plane network element receives a second message from the first terminal device, and the second message indicates that the first terminal device requests to withdraw from the first multicast group, so
  • the second message is a message of the first type; the user plane network element determines that the second message matches the third message detection rule, and uses all the information obtained from the second message
  • the IP multicast address of the first multicast group is mapped to the Ethernet multicast address of the first multicast group; the user plane network element indexes the first multicast group according to the Ethernet multicast address of the first multicast group
  • the routing rule of the Ethernet multicast packet of the multicast group is to delete the routing rule of the Ethernet multicast packet of the first multicast group according to the third packet processing rule.
  • the first terminal device can withdraw from the first multicast group.
  • the user plane network element manages the fourth processing associated with the first packet according to the third packet processing rule and the Ethernet multicast address of the first multicast group
  • the user plane network element indexes to the MAC address forwarding table corresponding to the first multicast group according to the Ethernet multicast address of the first multicast group, and according to the third packet processing rule in the first
  • the corresponding relationship between the Ethernet multicast address of the first multicast group and the identifier of the N4 session of the first Ethernet session is added to the MAC address forwarding table corresponding to the multicast group.
  • the first terminal device can join the first multicast group.
  • the user plane network element receives a second message from the first terminal device, and the second message indicates that the first terminal device requests to withdraw from the first multicast group, so
  • the second message is a message of the first type; the user plane network element determines that the second message matches the third message detection rule, and uses all the information obtained from the second message
  • the IP multicast address of the first multicast group is mapped to the Ethernet multicast address of the first multicast group; the user plane network element indexes to the second multicast group according to the Ethernet multicast address of the first multicast group
  • the MAC address forwarding table corresponding to the multicast group; the user plane network element deletes the Ethernet group of the first multicast group from the MAC address forwarding table corresponding to the first multicast group according to the third packet processing rule The corresponding relationship between the broadcast address and the identifier of the N4 session of the first Ethernet session.
  • the first terminal device can withdraw from the first multicast group.
  • the user plane network element receives access control information from the session management network element, where the access control information indicates at least one Ethernet group that the first terminal device is allowed to join broadcast group. Before the user plane network element manages the fourth processing rule associated with the first packet, the user plane network element determines that the at least one Ethernet-type multicast group includes the first multicast group.
  • the user plane network element can determine whether to allow the first terminal device to join or withdraw from the first multicast group.
  • the access control information includes the multicast address of the at least one Ether-type multicast group; or, the access control information includes the address of the at least one Ether-type multicast group information.
  • the third packet detection rule includes one or more of the following:
  • An IP packet filter used to instruct the user plane network element to detect the indication information of the first type of packet, or an Ethernet packet filter embedded with an IP packet filter.
  • the first type of message includes an IGMP message or an MLD message.
  • the embodiment of the present application provides a multicast communication method, the method comprising:
  • the session management network element receives the Ethernet PDU session establishment message from the first terminal device, and the Ethernet PDU session establishment message is used to request establishment of the first Ethernet PDU session; the session management network element acquires access control information, and the access The control information indicates at least one Ethernet-type multicast group that the first terminal device is allowed to join; the session management network determines the sixth processing rule corresponding to the first Ethernet PDU session according to the access control information, the The sixth processing rule includes the routing rules of the Ethernet multicast packets of the at least one Ethernet type multicast group, and the routing rules of the Ethernet multicast packets of the at least one Ethernet type multicast group are all in a deactivated state
  • the session management network sends the fifth processing rule corresponding to the first Ethernet PDU session and the sixth processing rule corresponding to the first Ethernet PDU session to the user plane network element; the fifth processing rule is used for the
  • the user plane network element processes the second type of message, and the second type of message is used for the first terminal device to request to join the Ethernet type multicast group, and the fifth processing rule
  • the session management network element can obtain the access control information after receiving the Ethernet PDU session establishment message of the first terminal device, and generate the fifth processing rule and the fifth processing rule corresponding to the first Ethernet PDU session according to the access control information.
  • the routing rule in the routing rule of the Ethernet multicast packet of an Ethernet type multicast group enables the first terminal device to join the Ethernet type multicast group.
  • the fifth processing rule is also used as a processing rule for the user plane network element to process a third type of packet, and the third type of packet is used for the first terminal device Request to leave the ether type multicast group.
  • the fifth processing rule also includes a second type of message detection rule and a second type of message processing rule, wherein the second type of message detection rule is used to detect the third type of message, so The second type of packet processing rule is used to instruct the user plane network element to set the routing rule of the multicast packet of the Ethernet type multicast group associated with the detected third type of packet from the active state to the deactivated state.
  • the user plane network element can deactivate the route in the routing rule of the Ethernet multicast message of at least one Ethernet type multicast group according to the fifth processing rule and the sixth processing rule corresponding to the first Ethernet PDU session.
  • the rule realizes that the first terminal device withdraws from the Ether type multicast group.
  • the session management network element sends access control information to the user plane network element, where the access control information indicates at least one Ethernet-type multicast session that the first terminal device is allowed to join Group.
  • the user plane network element can judge whether to allow the first terminal device to join or withdraw from the first multicast group.
  • the access control information includes the multicast address of the at least one Ether-type multicast group; or, the access control information includes the address of the at least one Ether-type multicast group information.
  • the session management network element acquires fifth indication information, where the fifth indication information is used to indicate that the first terminal device supports a multicast management protocol; the session management network element according to the The fifth indication information generates a fifth processing rule corresponding to the first Ethernet PDU session.
  • the session management network element may adopt but not limited to the following methods to obtain the fifth indication information:
  • the session management network element obtains the fifth indication information from the first terminal device; or, the session management network element obtains the fifth indication information from a unified data management network element or a policy control function network element or a data network authentication, authorization, and charging
  • the server acquires the fifth indication information.
  • the second type of message includes an IGMP message or an MLD message
  • the third type of message includes an IGMP message or an MLD message.
  • the embodiment of the present application provides a multicast communication method, the method comprising:
  • the user plane network element receives the fifth processing rule of the first Ethernet PDU session and the sixth processing rule of the first Ethernet PDU session from the session management function network element, and the first Ethernet PDU session is requested to be established by the first terminal device
  • the Ethernet PDU session ;
  • the fifth processing rule is used for the user plane network element to process the second type of message, and the second type of message is used for the first terminal device to request to join the Ethernet type multicast group
  • the sixth processing rule includes routing rules for Ethernet multicast packets of at least one Ethernet-type multicast group, and the routing rules for Ethernet multicast packets of the at least one Ethernet-type multicast group are in a deactivated state,
  • the at least one Ethernet-type multicast group is at least one Ethernet-type multicast group that the first terminal device is allowed to join
  • the fifth processing rule includes a first-type message detection rule and a first-type message processing rule rules, wherein the first type of message detection rule is used to detect the second type of message, and the first type of message processing rule is used to indicate that the
  • the user plane network element after receiving the fifth processing rule and the sixth processing rule corresponding to the first Ethernet PDU session, if the user plane network element receives the first packet, the user plane network element can The fifth processing rule and the sixth processing rule set the routing rule of the Ethernet multicast message of the first multicast group from the deactivated state to the activated state, so as to realize that the first terminal device joins the first multicast group.
  • the fifth processing rule is also used as a processing rule for the user plane network element to process a third type of packet, and the third type of packet is used for the first terminal device Request to exit the multicast group of the Ethernet type;
  • the fifth processing rule also includes a second type of message detection rule and a second type of message processing rule, wherein the second type of message detection rule is used to detect
  • the packet of the third type the packet processing rule of the second type is used to indicate that the user plane network element will associate the detected packet of the third type with the multicasting of the Ethernet type multicast group
  • the routing rule of the packet is set from the activated state to the deactivated state.
  • the user plane network element receives a second message from the first terminal device, and the second message indicates that the first terminal device requests to withdraw from the first multicast group, so
  • the second message is the third type of message; the user plane network element determines that the second message matches the detection rule of the second type of message, and uses the information obtained from the second message
  • the IP multicast address of the first multicast group is mapped to the Ethernet multicast address of the first multicast group; when the at least one Ethernet-type multicast group includes the first multicast group, the The user plane network element indexes the routing rules of the Ethernet multicast packets of the first multicast group according to the Ethernet multicast address of the first multicast group;
  • the processing rule sets the routing rule of the Ethernet multicast message of the first multicast group from an activated state to a deactivated state.
  • the user plane network element can set the routing rule of the Ethernet multicast packet of the first multicast group from the activated state to the deactivated state according to the fifth processing rule and the sixth processing rule corresponding to the first Ethernet PDU session , so that the first terminal device quits the first multicast group.
  • the user plane network element receives access control information from the session management network element, where the access control information indicates at least one Ethernet group that the first terminal device is allowed to join a multicast group; the user plane network element determines, according to the access control information, that the at least one Ethernet-type multicast group includes the first multicast group.
  • the user plane network element can determine whether to allow the first terminal device to join the first multicast group.
  • the access control information includes the multicast address of the at least one Ether-type multicast group; or, the access control information includes the address of the at least one Ether-type multicast group information.
  • the second type of message includes an IGMP message or an MLD message
  • the third type of message includes an IGMP message or an MLD message.
  • the present application further provides a device.
  • the device can perform the method design described above.
  • the apparatus may be a chip or a circuit capable of performing the function corresponding to the above method, or a device including the chip or circuit.
  • the apparatus includes: a memory, configured to store computer executable program codes; and a processor, and the processor is coupled to the memory.
  • the program codes stored in the memory include instructions, and when the processor executes the instructions, the device or the device installed with the device executes the method in any one of the above possible designs.
  • the device may further include a communication interface, which may be a transceiver, or, if the device is a chip or a circuit, the communication interface may be an input/output interface of the chip, such as an input/output pin.
  • a communication interface which may be a transceiver, or, if the device is a chip or a circuit, the communication interface may be an input/output interface of the chip, such as an input/output pin.
  • the device includes corresponding functional units for respectively implementing the steps in the above methods.
  • the functions may be implemented by hardware, or may be implemented by executing corresponding software through hardware.
  • Hardware or software includes one or more units corresponding to the functions described above.
  • the present application provides a computer-readable storage medium, where a computer program is stored in the computer-readable storage medium, and when the computer program is run on a device, the method in any one of the above possible designs is executed.
  • the present application provides a computer program product, where the computer program product includes a computer program, and when the computer program is run on a device, the method in any one of the above possible designs is executed.
  • the present application provides a communication system, the system includes a session management network element and a user plane network element, and the session management network element is used to implement any one of the first aspect, the third aspect, and the fifth aspect One possible design, the user plane network element is used to implement any one possible design in the second aspect, the fourth aspect, and the sixth aspect.
  • FIG. 1 is a schematic diagram of a 5G communication system architecture in an embodiment of the present application
  • FIG. 2 is a schematic diagram of a core network of a 5G network architecture in an embodiment of the present application
  • FIG. 3 is a schematic diagram of multicast communication in an embodiment of the present application.
  • FIG. 4A is an example diagram of a user-level N4 session in the embodiment of the present application.
  • FIG. 4B is an example diagram of a group-level N4 session in the embodiment of the present application.
  • FIG. 5 is a schematic diagram of a user plane architecture of a 5G LAN service in an embodiment of the present application
  • Fig. 6 is the schematic diagram of multicast communication of Ethernet type in the embodiment of the present application.
  • FIG. 7 is one of the overview flowcharts of a multicast communication method in the embodiment of the present application.
  • FIG. 8 is the second overview flowchart of a multicast communication method in the embodiment of the present application.
  • FIG. 9 is the third overview flowchart of a multicast communication method in the embodiment of the present application.
  • FIG. 10 is one of the schematic flow diagrams of the multicast communication method in the embodiment of the present application.
  • FIG. 11 is the second schematic flow diagram of the multicast communication method in the embodiment of the present application.
  • FIG. 12 is the third schematic flow diagram of the multicast communication method in the embodiment of the present application.
  • Fig. 13 is one of possible exemplary block diagrams of a device in the embodiment of the present application.
  • FIG. 14 is the second possible exemplary block diagram of a device in the embodiment of the present application.
  • At least one item (piece) of a, b, or c can represent: a, b, c, a-b, a-c, b-c, or a-b-c, where a, b, c can be single or multiple .
  • mobile networks that terminal devices can access include 2G, 3G, 4G, and 5G networks, which provide service data transmission channels for the call service, video service, and web page service of the terminal device.
  • 2G, 3G, 4G, and 5G networks which provide service data transmission channels for the call service, video service, and web page service of the terminal device.
  • new services such as the Internet of Vehicles, virtual reality, mobile office, and the Internet of Things
  • mobile networks need to provide optical fiber-like access rates.
  • the intelligent optimization of services and user perception, as well as large-scale energy efficiency improvements and cost reductions are the weaknesses of traditional networks, which cannot guarantee the rapid development of future services.
  • the 5G communication system architecture formulated by the 3rd generation partnership project (3GPP) standard mainly includes the following four parts, as shown in Figure 1:
  • the 5G mobile communication system architecture consists of terminal equipment (for example, user equipment (UE)), access network (access network, AN), core network (Core) and data network (data network, DN).
  • Equipment, AN, and Core are the main components of the architecture. Logically, they can be divided into two parts: the user plane and the control plane.
  • the control plane is responsible for the management of the mobile network, and the user plane is responsible for the transmission of business data.
  • the NG2 reference point is located between the AN control plane and the Core control plane
  • the NG3 reference point is located between the AN user plane and the Core user plane
  • the NG6 reference point is located between the Core user plane and the data network.
  • the terminal device is the entrance for the mobile user to interact with the network, and can provide basic computing power and storage capacity, display service windows to the user, and receive user operation input.
  • the next-generation terminal equipment (NextGen UE) can adopt new air interface technology to establish signal connection and data connection with AN, so as to transmit control signals and business data to the mobile network.
  • Terminal devices may include various handheld devices with wireless communication functions, vehicle-mounted devices, wearable devices, computing devices or other processing devices connected to wireless modems, as well as various forms of terminals, mobile stations (mobile station, MS), terminal (terminal), user equipment (UE), soft terminals, etc., such as water meters, electricity meters, sensors, etc.
  • AN Similar to the base station in the traditional network, it is deployed close to the terminal equipment, provides network access functions for authorized users in a specific area, and can determine different quality transmission tunnels to transmit user data according to user levels and business requirements. AN can manage its own resources, make reasonable use of them, provide access services for terminal equipment on demand, and be responsible for forwarding control signals and user data between terminal equipment and the core network.
  • Core responsible for maintaining the subscription data of the mobile network, managing network elements of the mobile network, and providing functions such as session management, mobility management, policy management, and security authentication for terminal devices.
  • the terminal device When the terminal device is attached, it provides network access authentication for the terminal device; when the terminal device has a service request, it allocates network resources for the terminal device; when the terminal device moves, it updates the network resources for the terminal device; when the terminal device is idle, Provide a fast recovery mechanism for the terminal device; release network resources for the terminal device when the terminal device is detached; provide data routing functions for the terminal device when the terminal device has business data, such as forwarding uplink data to the data network; or from the data
  • the network receives the downlink data of the terminal equipment, forwards it to the AN, and then the AN sends it to the UE.
  • the data network can be a private network, such as a local area network, or an external network not controlled by the operator, such as the Internet (Internet), or a proprietary network jointly deployed by the operator, such as providing an IP multimedia network subsystem (IP multimedia network subsystem). core network subsystem, IMS) service network.
  • IP multimedia network subsystem IP multimedia network subsystem
  • IMS core network subsystem
  • Figure 2 is a further refinement of the core network of the 5G network architecture based on Figure 1:
  • the core network user plane includes UPF;
  • the core network control plane includes authentication server function (authentication server function, AUSF), access and mobility management function (access and mobility management function, AMF), session management function (session management function, SMF), network slice selection function (network slice selection function, NSSF), network exposure function (network exposure function, NEF), network function storage function (NF repository function, NRF), unified data management (unified data management, UDM), Policy control function (policy control function, PCF), application function (application function, AF).
  • the control plane of the core network adopts a service-oriented architecture, and the interaction between network elements on the control plane adopts the method of service invocation to replace the point-to-point communication method in the traditional architecture.
  • the control plane NEs will open services to other control plane NEs for other control plane NEs to call; in point-to-point communication, the communication interface between control plane NEs will store a set of specific messages, only It can be used by control plane network elements at both ends of the interface during communication.
  • Session management network element mainly used for session management, IP address allocation and management of terminal equipment, selection of endpoints that can manage user equipment plane functions, policy control, or charging function interfaces, and downlink data notification.
  • the session management network element can be an SMF network element.
  • the session management function network element can still be an SMF network element, or have other names, which are not limited in this application.
  • Nsmf is a service-based interface provided by SMF. SMF can communicate with other network functions through Nsmf.
  • Access management network element mainly used for mobility management and access management, etc., for example, it can be a mobility management entity (mobility management entity, MME) function in a 4G communication network or an AMF network element in a 5G network. In future communications such as 6G communications, the access management network element may still be an AMF network element, or have other names, which are not limited in this application.
  • Namf is a service-based interface provided by AMF. AMF can communicate with other network functions through Namf.
  • Authentication service network element mainly used for user authentication, etc.
  • the authentication service network element may be an AUSF network element.
  • future communications such as 6G communications, the authentication service network element may still be an AUSF network element, or have other names, which are not limited in this application.
  • Nausf is a service-based interface provided by AUSF. AUSF can communicate with other network functions through Nausf.
  • Network open network element used to safely open services and capabilities provided by 3GPP network functions to the outside.
  • network open network elements may be NEF network elements.
  • network open function network elements may still be NEF network elements, or have other names, which are not limited in this application.
  • Nnef is a service-based interface provided by NEF, and NEF can communicate with other network functions through Nnef.
  • Network storage network element used to provide service registration, discovery and authorization, and maintain available network function (network function, NF) instance information, which can realize on-demand configuration of network functions and services and interconnection between NFs.
  • the network storage network element can be an NRF network element.
  • the network storage function network element can still be an NRF network element, or have other names, which are not limited in this application.
  • Nnrf is a service-based interface provided by NRF. NRF can communicate with other network functions through Nnrf.
  • Policy control network element a unified policy framework for guiding network behavior, providing policy rule information, etc. for control plane functional network elements (such as AMF, SMF, etc.).
  • the policy control network element can be a PCF network element.
  • the policy control function network element can still be a PCF network element, or have other names, which are not limited in this application.
  • Npcf is a service-based interface provided by PCF, and PCF can communicate with other network functions through Npcf.
  • Data management network element used to process user identification, subscription, access authentication, registration, or mobility management.
  • the data management network element may be a UDM network element.
  • future communications such as 6G communication, the data management network element may still be a UDM network element, or have other names, which are not limited in this application.
  • Nudm is a service-based interface provided by UDM, and UDM can communicate with other network functions through Nudm.
  • Application network element It is used to route the data affected by the application, access the open function of the network, or interact with the policy framework for policy control, etc.
  • the application network element may be an AF network element.
  • future communications such as 6G communication, the application network element may still be an AF network element, or have other names, which are not limited in this application.
  • Naf is a service-based interface provided by AF. AF can communicate with other network functions through Naf.
  • User plane network element used for packet routing and forwarding, or quality of service (QoS) processing of user plane data, etc.
  • the user plane network element may be a user plane function (UPF) network element.
  • UPF user plane function
  • future communications such as 6G communication
  • the user plane network element may still be a UPF network element, or have other names. This application There is no limit to this.
  • Network element with network slice selection function used to select network slices for terminal equipment.
  • the network element with network slice selection function can be an NSSF network element.
  • future communications such as 6G communication, the network element with network slice selection function is still It may be an NSSF network element, or have other names, which are not limited in this application.
  • the technical solutions provided by the embodiments of the present application can be applied to various communication systems. For example, it can be applied to a long term evolution (long term evolution, LTE) system or a 5G system, and can also be applied to other future-oriented new systems, such as a programmable user plane system, which is not specifically limited in this embodiment of the present application. Also, the term “system” and “network” may be used interchangeably.
  • Multicast communication refers to a one-to-many communication mode, in which a terminal device can send messages to terminal devices in the multicast group to which it belongs.
  • Multicast communication may also be described as multicast communication, and correspondingly, a multicast group may also be described as multicast group.
  • the multicast group address is used as the destination address
  • the source of the message is called the multicast source
  • the multicast user receiving the multicast data is called the multicast member. That is, multicast is directional, and the direction is from the multicast source to the multicast members.
  • members in the 5GLAN group include terminal device 1, terminal device 2, terminal device 3, terminal device 4, terminal device 5, and terminal device 6.
  • terminal device 1 as the multicast source
  • terminal device 3, terminal device 5, and terminal device 6 as multicast members to form a multicast group as an example
  • the corresponding communication schematic diagram can be seen in Figure 3, that is, the message sent by terminal device 1
  • the multicast message can be transmitted to the terminal device 3, the terminal device 5 and the terminal device 6 in the multicast group respectively.
  • terminal device 2 and terminal device 4 are not multicast members of the multicast group, so they will not receive the multicast message.
  • the N4 session in this embodiment of the present application includes a user-level N4 session and a group-level N4 session.
  • an N4 session can be created by a session management network element on a user plane network element.
  • the session management network element when a terminal device establishes an Ethernet protocol data unit (protocol data unit, PDU) session, the session management network element creates an N4 session corresponding to the Ethernet PDU session on the user plane network element.
  • the user plane network element receives the packet (such as a multicast packet) sent by the terminal device through the user-level N4 session, and the user plane network element sends a packet (such as a multicast packet) to the terminal device through the user-level N4 session. arts).
  • the session management network element receives the Ethernet PDU session release request of the terminal device, it triggers the user plane network element to delete the N4 session corresponding to the Ethernet PDU session.
  • one user plane network element can create one or more N4 sessions corresponding to the Ethernet PDU sessions.
  • the user plane network element needs to create an Ethernet The N4 session corresponding to the PDU session.
  • the SMF network element can instruct the UPF network element 1 to create an N4 session corresponding to the Ethernet PDU session of the terminal device 1 (such as N4 session 1 in FIG. 4A ) when creating the Ethernet PDU session of the terminal device 1, and , the SMF network element may instruct the UPF network element 1 to create an N4 session 6 corresponding to the Ethernet PDU session of the terminal device 6 (such as N4 session 6 in FIG. 4A ) when creating the Ethernet PDU session of the terminal device 6 .
  • the N4 session corresponding to the Ethernet PDU session of the terminal device 1 may also be referred to as the N4 session of the terminal device 1 for short
  • the N4 session corresponding to the Ethernet PDU session of the terminal device 6 may also be referred to as the N4 session of the terminal device 6 for short.
  • the session management network element In order to support the communication between different user plane network elements and the communication between user plane network elements and DN in the 5G LAN service, the session management network element also needs to be corresponding to each user plane network element providing the 5G LAN service.
  • the 5G LAN group creates group-level N4 sessions.
  • the session management network element may instruct the user plane network element to create a group-level N4 corresponding to the 5G LAN group when creating the first Ethernet PDU session anchored to the user plane network element of the 5G LAN group session; and, the session management network element may instruct the user plane network element to delete the group-level N4 session corresponding to the 5G LAN group when releasing the last Ethernet PDU session of the user plane network element anchored in the 5G LAN group.
  • a user plane network element may include one or more group-level N4 sessions.
  • each group-level N4 session corresponds to a 5G LAN group.
  • a group-level N4 session corresponding to the 5G LAN group can be created for one or more user plane network elements that provide services for the 5G LAN group.
  • FIG. 4B is an example diagram of group-level N4 sessions.
  • the SMF network element has instructed the UPF network element 1 to create an N4 session corresponding to the Ethernet PDU session of the terminal device 1 (such as N4 session 1 in FIG. 4B ) when creating the Ethernet PDU session of the terminal device 1, Then, when the SMF network element creates the Ethernet PDU session of the terminal device 2, it can instruct the UPF network element 2 to create an N4 session corresponding to the Ethernet PDU session of the terminal device 2 (such as N4 session 2 in FIG. 4B ).
  • the 5G LAN group includes terminal device 1 and terminal device 2.
  • terminal device 1 in the 5G LAN group has already connected to UPF network element 1, and now terminal device 2 is connected to UPF network element 2, there are multiple UPF network elements that are 5G
  • the LAN group provides services and requires communication between different user plane network elements, so the SMF network element needs to instruct the UPF network element 2 to create a group-level N4 session corresponding to the 5G LAN group (N4 session 3 in Figure 4B); And, the SMF network element instructs the UPF network element 1 to create a group-level N4 session corresponding to the 5G LAN group (such as N4 session 4 in Figure 4B).
  • the SMF network element can also instruct the UPF network element 1 to create a group-level N4 session corresponding to the 5G LAN group (N4 session 4 in Figure 4B) , not specifically limited here.
  • the internal interface of the user plane network element is a virtual port or a specific port in the user plane network element, and is used for locally forwarding received data packets by the user plane network element.
  • the local forwarding of the received data packet by the user plane network element can be understood as the user plane network element re-receives the data packet on the internal interface, so that the data packet is detected by the user plane network element again, so as to match the corresponding routing rule, Forward to the correct path.
  • the terminal device establishes a session to the UPF network element that provides 5G LAN services, thereby accessing the user plane of 5G LAN.
  • the UPF network element providing 5G LAN service can communicate with the existing local area network (local area network, LAN) in the data network through the N6 interface, such as communicating with a personal computer (personal computer, PC) in the LAN; or, providing 5G LAN service
  • the UPF network element can also connect the sessions of different terminal devices through the internal interface of the UPF network element (internal interface) or the N19 tunnel between the UPF network elements to realize private communication, which is not specifically limited in the embodiment of the present application.
  • a terminal device can send a multicast message to one or more other terminal devices, and after receiving the multicast message, the network element of the user plane can, according to its multicast address, Distribute it to one or more specified terminal devices.
  • the network element of the user plane can, according to its multicast address, Distribute it to one or more specified terminal devices.
  • how a terminal device enters or exits an Ethernet multicast group is a problem that needs to be solved.
  • multicast group 1 is an Ethernet multicast group
  • UE1 sends a black multicast packet (as shown by the black arrow)
  • UPF1 receives After receiving the multicast message, forward it to UE2 according to the Ethernet multicast address included in the multicast message, and forward it to the N19 tunnel, so that the peer UPF2 forwards the multicast message to UE4.
  • UPF1 receives black multicast packets from N19 interface or N6 interface, forwards them to UE1 and UE2 (not shown) according to the Ethernet multicast address, and does not send them to N19 tunnel again.
  • the packet detection rules (packet detection rules, PDR) for processing the Ethernet multicast message received by the internal interface and sent to the Ethernet PDU session may include internal interface parameters, group instance information, Ethernet multicast address, message replication information
  • the forwarding action rules (forwarding action rules, FAR) associated with the PDR can include the Ethernet PDU session tunnel information
  • the PDR that processes the Ethernet multicast message received from N19 or N6 and sends the internal interface can include the N19 tunnel/N6 Interface information
  • group instance information, Ethernet multicast address, the FAR associated with the PDR can include internal interface parameters, N19/N6 indication information
  • processing Ethernet multicast packets received from the internal interface and sent to N19 PDR can include Internal interface parameters, group instance information, Ethernet multicast address, packet replication information, and the FAR associated with the PDR may include N19 tunnel information.
  • UE1, UE3, and devices in DN form another multicast group 2, and multicast group 2 is an Ethernet multicast group, and UE1 sends a white multicast message (as indicated by the white arrow).
  • UPF1 After receiving the multicast message, UPF1 forwards it to UE3 according to the multicast address of the multicast message, and forwards it to the data network through the N6 interface.
  • the first type of message is used for a terminal device to request to join or exit an Ethernet type multicast group.
  • the first type of message is an Ethernet type message, or an Ethernet message, or an Ethernet data packet, and the above three descriptions in the embodiment of the present application have the same meaning and can be replaced with each other.
  • the first type of message includes a message header and a payload part, and the message header part of the first type of message includes a source media access control (media access control, MAC) address, a destination MAC address, an Ethernet type, and a virtual local area network (virtual local area network, VLAN) tags, etc.;
  • the load part of the first type of message includes a multicast management protocol message, the multicast management protocol message is an IP message, and the multicast management protocol message can be a network group Group management protocol (internet group management prtocol, IGMP) message or multicast listener discovery protocol (multicast listener discovery, MLD) message.
  • the multicast management protocol message may include the IP multicast address of the multicast group that the terminal device requests to join or quit.
  • the above-mentioned IP multicast address may be a multicast IP version 4 (IP version 4, IPv4) address or a multicast IP version 6 (IP version 6, IPv6) address.
  • the multicast management protocol message is an IGMP message
  • the IGMP message includes the multicast IPv4 address of the multicast group that the terminal device requests to join or exit.
  • the multicast management protocol message is an MLD message
  • the MLD message includes the multicast IPv6 address of the multicast group that the terminal device requests to join or exit.
  • the first message is a message of the first type, and the first message indicates that the terminal device requests to join the first multicast group, and the first multicast group is an Ethernet type multicast group.
  • the first message is a message of the first type, and the first message indicates that the terminal device requests to withdraw from the first multicast group, and the first multicast group is an Ethernet type multicast group.
  • the fifth indication information indicates that the terminal device supports the multicast management protocol, that is, the terminal device can send the first type of message to request to join or exit the Ethernet type multicast group.
  • the fifth indication information may be IGMP indication information, and at this time, the fifth indication information may be described as indicating that the terminal device supports sending IGMP messages, or indicating that the terminal device processes IGMP messages in the Ethernet PDU session Or Ethernet packets including IGMP packets.
  • the IGMP indication information may also be replaced with a packet filter set (PFS) for detecting IGMP messages.
  • PFS packet filter set
  • the fifth indication information may be MLD indication information.
  • the fifth indication information may be described as indicating that the terminal device supports sending MLD packets, or indicating that the terminal device detects MLD packets in the Ethernet PDU session. text or Ethernet packets including MLD packets.
  • the MLD indication information may also be replaced with a packet filter set (PFS) for detecting MLD packets.
  • PFS packet filter set
  • the processing process of the session management network element when the fifth indication information is the MLD indication information is similar to the processing process of the session management network element when the fifth indication information is the IGMP indication information. Only the fifth indication information will be used below It is IGMP indication information, and the first packet is an Ethernet packet including an IGMP packet as an example for illustration.
  • the access control information may include an access control list (access control list, ACL).
  • Access control information may include but not limited to the following two implementations:
  • the access control information may indicate the multicast addresses of one or more multicast groups that the terminal device is allowed to join, and the access control information at this time may be understood as the access control information at the granularity of the terminal device.
  • the ACL includes a multicast address list (list), that is, the multicast address of the multicast group 1 and the multicast address of the multicast group 2.
  • the access control information may include information of at least one multicast group, and the access control information at this time may be understood as the access control information at the granularity of the multicast group.
  • the information of at least one multicast group includes information of the first multicast group, and the information of the first multicast group may include identifiers of terminal devices included in the first multicast group.
  • the identifier of the terminal device may be an address of the terminal device, or a generic public subscription identifier (generic public subscription identifier, GPSI) or a user (User) ID.
  • the information of the first multicast group may also include one or more of the following: an identifier of the first multicast group, and a multicast address of the first multicast group.
  • multicast group 1 includes UE1 to UE5, then the ACL includes the ID of multicast group 1, the multicast address of multicast group 1, UE ID list (list) (UE1 ID, UE2 ID, UE3 ID, UE4 ID, UE5 ID).
  • list UE1 ID, UE2 ID, UE3 ID, UE4 ID, UE5 ID.
  • the ACL is applied to all members in the 5GLAN group. For example, assuming that 5G LAN group 2 includes UE1 ⁇ UE8, and the ACL includes the ID of multicast group 3 and the multicast address of multicast group 3, then the ACL indicates that multicast group 3 includes UE1 ⁇ UE8.
  • the multicast address in the above two manners may be an Ethernet multicast address or an IP multicast address.
  • the Ethernet multicast address and the MAC multicast address can replace each other.
  • the fifth indication information at this time only indicates that the terminal device supports the multicast management protocol .
  • the IGMP indication information only indicates to process the IGMP message or the Ethernet message including the IGMP message in the Ethernet PDU session of the terminal device.
  • the fifth indication information indicates that multiple terminal devices support the multicast management protocol.
  • ACL includes the ID of multicast group 1, the multicast address of multicast group 1, UE ID list (list) (UE1 ID, UE2 ID, UE3 ID, UE4 ID, UE5 ID), then when the fifth indication information is When the IGMP indication information is used, the IGMP indication information indicates to process the IGMP message or the Ethernet message including the IGMP message in the Ethernet PDU session from UE1 to UE5.
  • the embodiment of the present application provides a multicast communication method, which is used to enable a terminal device to join or withdraw from an Ethernet multicast group.
  • the session management network element After receiving the Ethernet PDU session establishment message, the session management network element sends the first processing rule corresponding to the first Ethernet PDU session to the user plane network element, and the user plane network element can receive the first After receiving a message of the first type, report the detected message of the first type according to the first processing rule, so as to realize that the first terminal device joins or exits the multicast group of the Ethernet type.
  • the method shown in Figure 7 is described below:
  • Step 700 The first terminal device sends an Ethernet PDU session establishment message to the session management network element, and the Ethernet PDU session establishment message is used to request establishment of the first Ethernet PDU session.
  • Ethernet PDU session establishment message may be understood as a PDU session establishment request message in which the PDU session type is set to Ethernet.
  • Step 710 The session management network element sends the first processing rule corresponding to the first Ethernet PDU session to the user plane network element.
  • the user plane network element receives the first processing rule of the first Ethernet PDU session from the session management function network element.
  • the first processing rule is used to instruct the user plane network element to process the first type of message received from the first terminal device.
  • first type of message reference may be made to the above relevant description, and repeated descriptions will not be repeated.
  • the first processing rule includes a first packet detection rule and a first packet processing rule, the first packet detection rule is used to detect a first type of packet, and the first packet processing rule is used to report the detection to the session management network element The first type of message received.
  • the first processing rule may include a PDR for detecting the first type of message and a FAR associated with the PDR for detecting the first type of message, or the first processing rule may include a PDR for detecting the first type of message
  • usage reporting rule URR
  • the first packet detection rule may include one or more of the following: IP packet filter, which is used to instruct the user plane network element to detect the indication information of the first type of packet, or embedded to detect IP Packet filter Ethernet packet filter.
  • the IP packet filter can be used by the user plane network element to determine whether the detected packet includes an IP packet, and when it is detected that the packet includes an IP packet, determine that the detected packet is the first type of packet .
  • an Ethernet packet filter embedded with a filter for detecting IP packets can be used by a user plane network element to determine whether a detected packet is an Ethernet type packet, and whether the Ethernet type packet includes The IP packet is determined to be detected as a packet of the first type when the detected packet is an Ethernet type packet and the detected packet includes an IP packet.
  • the indication information for instructing the user plane network element to detect the first type of packet may be used to explicitly indicate whether the user plane network element detects whether the received packet includes the first type of packet.
  • the session management network element can also obtain fifth indication information, the fifth indication information is used to indicate that the first terminal device supports the multicast management protocol, and the session management network element can send the user plane network element according to the fifth indication information Send the first processing rule corresponding to the first Ethernet PDU session.
  • the session management network element may obtain the fifth instruction information from the first terminal device, or the session management network element may obtain the fifth instruction from a unified data management network element or a policy control function network element or a data network authentication, authorization, and accounting server information.
  • the session management network acquires the fifth indication information reference may be made to manners 1 to 6 in FIG. 10 , which will not be repeated here.
  • Step 720 the first terminal device sends a first message, the first message indicates that the first terminal device requests to join the first multicast group, the first message is a message of the first type, and the first multicast group is an Ethernet type multicast group.
  • Step 730 The user plane network element determines that the first packet matches the first packet detection rule, and sends the first indication information to the session management function network element according to the first packet processing rule.
  • the session management function network element receives the first indication information from the user plane network element.
  • the user plane network element may determine that the first packet includes an IP packet through an IP packet filter, and then determine whether the first packet is related to the first packet.
  • a packet detection rule is matched, that is, a packet of the first type is detected.
  • the user plane network element may determine that the first packet is an Ethernet type packet through an Ethernet packet filter embedded with a filter for detecting IP packets, and the first packet includes an IP packet, and then determine that the second packet is an Ethernet packet.
  • the first indication information may include the first packet, or a multicast management protocol packet (such as an IGMP packet or an MLD packet) in the first packet, or an N4 report generated according to the first packet.
  • a multicast management protocol packet such as an IGMP packet or an MLD packet
  • the first indication information may include the first message, or the multicast management protocol message in the first message .
  • the first processing rule may include the URR associated with the PDR used to detect the first type of message
  • the first indication information may include the N4 report generated according to the first message.
  • the first message or the multicast management protocol message in the first message includes the IP multicast address of the first multicast group
  • the N4 report generated according to the first message includes the IP multicast address of the first multicast group. address or Ethernet multicast address.
  • the user plane network element maps the IP multicast address of the first multicast group in the first message to the first multicast The Ethernet multicast address of the group.
  • the session management function network element may also send second indication information to the user plane network element, and the second indication information is used to instruct the user plane network element to map the IP multicast address obtained according to the first type of message to is an Ethernet multicast address, and at this time, the user plane network element maps the IP multicast address of the first multicast group in the first packet to an Ethernet multicast address according to the second indication information.
  • step 740 the session management function network element sends the second processing rule corresponding to the first Ethernet PDU session to the user plane network element.
  • the second processing rule is a routing rule of the Ethernet multicast packet of the first multicast group, and may be described as a routing rule corresponding to the Ethernet multicast address of the first multicast group.
  • the second processing rule includes a second message detection rule and a second message processing rule.
  • the second message detection rule is used to detect the Ethernet multicast message of the first multicast group, and the second message processing rule is used to control the first multicast group. Forwarding of Ethernet multicast packets of a multicast group. It can be understood that the second processing rule at this time is a processing rule at the granularity of the terminal device.
  • the Ethernet multicast message of the first multicast group includes the Ethernet multicast group address of the first multicast group, and the Ethernet multicast message of the first multicast group will be forwarded to the multicast group in the first multicast group. member.
  • the second processing rule includes the PDR used to detect the Ethernet multicast packet of the first multicast group and the FAR associated with the PDR used to detect the Ethernet multicast packet of the first multicast group, and the Ethernet multicast packet For details of forwarding, refer to the relevant description shown in FIG. 6 , which will not be repeated here.
  • the session management network element may also determine whether to allow the first terminal device to join the first multicast group, When it is determined that the first terminal device is allowed to join the first multicast group, the session management network element generates a second processing rule; otherwise, the session management network element discards the first indication information.
  • the session management network element acquires the multicast addresses of one or more Ethernet multicast groups that the first terminal device is allowed to join. The session management network element determines that the multicast addresses of one or more Ethernet multicast groups that the first terminal device is allowed to join include the multicast address of the first multicast group, and the session management network element generates a second processing rule.
  • the session management network element acquires information of at least one multicast group, and the information of each multicast group includes an identifier of at least one terminal device.
  • the session management network element determines that at least one multicast group includes the first multicast group, and the information of the first multicast group includes the identifier of the first terminal device, and the session management network element generates a second processing rule.
  • the session management network element when the first indication information includes the IP multicast address of the first multicast group, the session management network element needs to map the IP multicast address of the first multicast group to the Ethernet group of the first multicast group broadcast address. The session management network element generates a second processing rule according to the Ethernet multicast packets of the first multicast group.
  • the user plane network element may also receive a second message from the first terminal device, the second message indicates that the first terminal device requests to withdraw from the first multicast group, and the second message is of the first type packets, the first multicast group is an Ethernet multicast group.
  • the user plane network element sends third indication information to the session management function network element according to the first packet processing rule.
  • the third indication information may include the second message, or the multicast management protocol message in the second message, or the N4 report generated according to the second message.
  • the second message or the multicast management protocol message in the second message includes the IP multicast address of the first multicast group
  • the N4 report generated according to the second message includes the IP multicast address of the first multicast group address or Ethernet multicast address.
  • the user plane network element maps the IP multicast address of the first multicast group in the second message to the first multicast
  • the Ethernet multicast address of the group, or the user plane network element maps the IP multicast address of the first multicast group in the second packet to the Ethernet multicast address according to the second indication information.
  • the session management network element may send fourth indication information to the user plane network element according to the received third indication information, where the fourth indication information is used to instruct the user plane network element to delete the second processing rule.
  • the session management network element can send the first processing rule corresponding to the first Ethernet PDU session to the user plane network element after receiving the Ethernet PDU session establishment message of the first terminal device, so that the user plane network element can receive the first processing rule corresponding to the first Ethernet PDU session.
  • the report of the first type of message to the session management network element can be realized, and then the first terminal device can join or exit the Ethernet type multicast group.
  • the embodiment of the present application provides a multicast communication method, which is used to realize that a terminal device dynamically joins an Ethernet type multicast group.
  • the session management network element sends the third processing rule corresponding to the first Ethernet PDU session to the user plane network element, and the user plane network element can receive the first
  • the third processing rule create or delete the routing rule for the Ethernet multicast group of the Ethernet type multicast group associated with the first type of message detected, or update the routing rule related to the first type of message detected
  • the MAC address forwarding table of the Ethernet-type multicast group associated with a type of message thereby enabling the first terminal device to join or exit the Ethernet-type multicast group.
  • step 800 reference may be made to the relevant description of step 700, and repeated descriptions will not be repeated here.
  • Step 810 The session management network element sends the third processing rule corresponding to the first Ethernet PDU session to the user plane network element.
  • the user plane network element receives the third processing rule of the first Ethernet PDU session from the session management function network element.
  • the third processing rule is used for the user plane network element to process the first type of message received from the first terminal device
  • the third processing rule includes a third message detection rule and a third message processing rule
  • the third message The detection rule is used to detect the first type of message.
  • the first type of message is used for the first terminal device to request to join or exit the Ethernet type multicast group.
  • the third message processing rule is used to manage and detect the first
  • a fourth processing rule associated with the packet of the first type the fourth processing rule is used to instruct the user plane network element to process the Ethernet multicast packet of the multicast group of the Ethernet type associated with the detected packet of the first type.
  • the fourth processing rule may include the following two possible implementation methods:
  • the fourth processing rule is the routing rule of the Ethernet multicast group of the Ethernet type multicast group associated with the first type of message detected, and the fourth processing rule includes the fourth message detection rule and the fourth message processing rule, the fourth message detection rule is used to detect the Ethernet multicast message of the Ethernet type multicast group associated with the first type of message detected, and the fourth message processing rule is used for The forwarding of the Ethernet multicast message of the Ethernet type multicast group associated with the detected first type message is controlled.
  • the fourth processing rule is the MAC address forwarding table of the Ethernet-type multicast group associated with the detected first-type message.
  • the MAC address forwarding table includes association information of MAC multicast addresses (also called Ethernet multicast addresses) and N4 sessions corresponding to one or more Ethernet PDU sessions. Adding the first associated information in the MAC address forwarding table can be understood as creating a new MAC address forwarding table. Deleting the last associated information from the MAC address forwarding table can be understood as deleting the MAC address forwarding table.
  • the user plane network element uses the MAC address forwarding table to determine the N4 session corresponding to one or more Ethernet PDU sessions associated with the Ethernet multicast message, it can continue to use the PDR and FAR in the corresponding N4 session to forward the Ethernet group broadcast to the corresponding Ethernet PDU session, or directly forward the multicast message to the corresponding Ethernet PDU session.
  • the fourth processing rule at this time may be a processing rule with a granularity of a user plane network element.
  • the third processing rule may not include the third packet processing rule.
  • the session management network needs to send configuration information to the user plane network element, and the configuration information indicates that the user plane network element management and detection
  • the fourth processing rule associated with the received first type of message for example, the configuration information instructs the user plane network element to create and detect the first type of message when the first terminal device requests to join the Ethernet type multicast group
  • the routing rule of the Ethernet multicast group associated with the first type of message or update the MAC address of the Ethernet multicast group associated with the first type of message detected.
  • the configuration information also instructs the user plane network element to delete the Ethernet-type group associated with the detected first-type message when the first-type message is used by the first terminal device to request to exit the Ethernet-type multicast group
  • the routing rule of the Ethernet multicast message of the multicast group or update the MAC address forwarding table of the Ethernet type multicast group associated with the detected first type message.
  • the session management network element can also obtain fifth indication information, the fifth indication information is used to indicate that the first terminal device supports the multicast management protocol, and the session management network element can send the user plane network element according to the fifth indication information Send the third processing rule corresponding to the first Ethernet PDU session.
  • the session management network element may obtain the fifth instruction information from the first terminal device, or the session management network element may obtain the fifth instruction from a unified data management network element or a policy control function network element or a data network authentication, authorization, and accounting server information.
  • the session management network acquires the fifth indication information reference may be made to manners 1 to 6 in FIG. 10 , which will not be repeated here.
  • step 820 reference may be made to the relevant description of step 720, and repeated descriptions will not be repeated here.
  • Step 830 the user plane network element determines that the first packet matches the third packet detection rule, and maps the IP multicast address of the first multicast group obtained from the first packet to the Ethernet multicast of the first multicast group address.
  • Step 840 The user plane network element manages a fourth processing rule associated with the first packet according to the third packet processing rule and the Ethernet multicast address of the first multicast group.
  • the user plane network element manages the fourth processing rule associated with the first message according to the third message processing rule and the Ethernet multicast address of the first multicast group, It can also be divided into the following two ways:
  • the user plane network element creates the Ethernet multicast packet of the first multicast group according to the third packet processing rule and the Ethernet multicast address of the first multicast group Routing rules
  • the routing rules of the Ethernet multicast packets of the first multicast group include the packet detection rules of the Ethernet multicast packets of the first multicast group and the packet processing of the Ethernet multicast packets of the first multicast group rule
  • the packet detection rule of the Ethernet multicast packet of the first multicast group is used to detect the Ethernet multicast packet of the first multicast group
  • the packet processing rule of the Ethernet multicast packet of the first multicast group is used It is used to control the forwarding of the Ethernet multicast packets of the first multicast group.
  • the user plane network element receives a second message from the first terminal device, the second message indicates that the first terminal device requests to withdraw from the first multicast group, and the second message is a message of the first type , the user plane network element determines that the second packet matches the third packet detection rule, and maps the IP multicast address of the first multicast group obtained from the second packet to the Ethernet multicast address of the first multicast group , the user plane network element indexes the routing rules of the Ethernet multicast packets of the first multicast group according to the Ethernet multicast address of the first multicast group, and deletes the Ethernet multicast packets of the first multicast group according to the third packet processing rule Routing rules for text.
  • the user plane network element indexes the MAC address forwarding table corresponding to the first multicast group according to the Ethernet multicast address of the first multicast group, and according to the third packet processing rule Add the corresponding relationship between the Ethernet multicast address of the first multicast group and the identifier of the N4 session of the first Ethernet session in the forwarding table corresponding to the MAC address of the first multicast group.
  • the user plane network element receives a second message from the first terminal device, the second message indicates that the first terminal device requests to withdraw from the first multicast group, and the second message is a message of the first type arts.
  • the user plane network element determines that the second packet matches the third packet detection rule, and maps the IP multicast address of the first multicast group obtained from the second packet to the Ethernet multicast address of the first multicast group.
  • the user plane network element indexes the MAC address forwarding table corresponding to the first multicast group according to the Ethernet multicast address of the first multicast group.
  • the user plane network element deletes the corresponding relationship between the Ethernet multicast address of the first multicast group and the identifier of the N4 session of the first Ethernet session in the MAC address forwarding table corresponding to the first multicast group according to the third packet processing rule.
  • the session management network element sends access control information to the user plane network element, where the access control information indicates at least one Ethernet-type multicast group that the first terminal device is allowed to join.
  • the user plane network element may determine whether to allow the first terminal device to join or withdraw from the Ethernet multicast group according to the access control information.
  • the session management network element can send the third processing rule corresponding to the first Ethernet PDU session to the user plane network element after receiving the Ethernet PDU session establishment message of the first terminal device, so that the user plane network element can receive the third processing rule corresponding to the first Ethernet PDU session.
  • the fourth processing rule associated with the detected first type of message can be managed according to the third processing rule, and then the first terminal device can implement the first terminal device to join or exit Ether type multicast group.
  • the embodiment of the present application provides a multicast communication method, which is used to realize that a terminal device dynamically joins an Ethernet type multicast group.
  • the session management network element After receiving the Ethernet PDU session establishment message, the session management network element sends the fifth processing rule and the sixth processing rule corresponding to the first Ethernet PDU session to the user plane network element, and the user plane network element can After receiving the first type of message, adjust the state of the routing rule of the Ethernet multicast group associated with the first type of message according to the fifth processing rule, and then realize the first terminal device Join or quit the ether type multicast group.
  • the method shown in Figure 9 is described below:
  • step 900 reference may be made to the relevant description of step 700, and repeated descriptions will not be repeated here.
  • Step 910 The session management network element acquires access control information, and the access control information indicates at least one Ethernet-type multicast group that the first terminal device is allowed to join.
  • the session management network element sends access control information to the user plane network element, and the access control information indicates at least one Ethernet-type multicast group that the first terminal device is allowed to join, so that the user plane network element It may be judged according to the access control information whether to allow the first terminal device to join or withdraw from the Ether-type multicast group.
  • Step 920 The session management network element determines the sixth processing rule corresponding to the first Ethernet PDU session according to the access control information.
  • the sixth processing rule includes routing rules for multicast packets of at least one Ethernet-type multicast group, and the routing rules for the Ethernet multicast packets of at least one Ethernet-type multicast group are all in a deactivated state.
  • the state of the routing rules of the Ethernet multicast packets of each Ethernet type multicast group may be a deactivated state or an activated state.
  • the status of the routing rules of the Ethernet multicast packets of each Ethernet type multicast group may be indicated by status indication information.
  • the state indication information may be located inside or outside the routing rules of the Ethernet multicast packets of each Ethernet type multicast group.
  • the state of the routing rules of the Ethernet multicast packets of each Ethernet type multicast group may be indicated by a bitmap.
  • the sixth processing rule corresponding to the first Ethernet PDU session includes routing rules and bitmaps of Ethernet multicast packets of N Ethernet-type multicast groups, where N is a positive integer, and the bitmap is the same as that of N Ethernet-type multicast groups.
  • the routing rules of the Ethernet multicast packets of the multicast group have a mapping relationship.
  • the session management network element may send the mapping relationship to the user plane network element, or the mapping relationship is preconfigured on the user plane network element.
  • the bitmap may include N bits, and each bit in the bitmap corresponds to a routing rule for a multicast packet of an Ethernet-type multicast group, and the value of each bit in the bitmap may be the first preset value or a second preset value, wherein the first preset value is used to indicate that the routing rule of the multicast packet of the Ethernet type multicast group is in a deactivated state, and the second preset value is used to indicate that the Ethernet type multicast
  • the routing rule of the multicast packet of the group is in an active state, for example, the first preset value is "0", and the second preset value is "1".
  • Step 930 The session management network sends the fifth processing rule corresponding to the first Ethernet PDU session and the sixth processing rule corresponding to the first Ethernet PDU session to the user plane network element.
  • the session management network element can also obtain fifth indication information, the fifth indication information is used to indicate that the first terminal device supports the multicast management protocol, and the session management network element can generate the first Ethernet PDU according to the fifth indication information
  • the fifth processing rule corresponding to the session may obtain the fifth indication information from the first terminal device, or the session management network element may obtain the fifth indication information from a unified data management network element or a policy control function network element or a data network authentication, authorization, and accounting server. 5. instruction information.
  • the session management network acquires the fifth indication information reference may be made to manners 1 to 6 in FIG. 10 , which will not be repeated here.
  • the fifth processing rule is used for the user plane network element to process the second type of message
  • the second type of message is used for the first terminal device to request to join the multicast group of the Ethernet type
  • the fifth processing rule includes the first type of message
  • the first type of packet detection rule and the first type of packet processing rule wherein the first type of packet detection rule is used to detect the second type of packet, and the first type of packet processing rule is used to indicate that the user plane network element will
  • the routing rule of the multicast message of the Ethernet type multicast group associated with the second type message is set from the deactivated state to the activated state.
  • the fifth processing rule is also used as a processing rule for the user plane network element to process the third type of message, and the third type of message is used for the first terminal device to request to exit the Ethernet type multicast group.
  • the fifth processing rule also includes a second type of message detection rule and a second type of message processing rule, wherein the second type of message detection rule is used to detect a third type of message, and the second type of message processing rule It is used to instruct the user plane network element to set the routing rule of the multicast packet of the Ethernet type multicast group associated with the detected third type packet from an activated state to a deactivated state.
  • step 940 reference may be made to the related description of step 720, and repeated descriptions will not be repeated here.
  • Step 950 The user plane network element determines that the first packet matches the detection rule of the first type of packet, and maps the IP multicast address of the first multicast group obtained from the first packet to the Ethernet group of the first multicast group broadcast address.
  • Step 960 When at least one Ethernet multicast group includes the first multicast group, the user plane network element indexes the route of the Ethernet multicast packet of the first multicast group according to the Ethernet multicast address of the first multicast group According to the rule, the user plane network element sets the routing rule of the Ethernet multicast packet of the first multicast group from the deactivated state to the activated state according to the first type of packet processing rule.
  • the user plane network element may also receive a second message from the first terminal device, the second message indicates that the first terminal device requests to withdraw from the first multicast group, and the second message is of the third type packet, the user plane network element determines that the second packet matches the second type packet detection rule, and maps the IP multicast address of the first multicast group obtained from the second packet to the Ethernet address of the first multicast group. multicast address.
  • the user plane network element indexes to the routing rule of the Ethernet multicast packet of the first multicast group according to the Ethernet multicast address of the first multicast group.
  • the user plane network element sets the routing rule of the Ethernet multicast message of the first multicast group from the activated state to the deactivated state according to the second type of message processing rule.
  • the session management network element can obtain the access control information after receiving the Ethernet PDU session establishment message of the first terminal device, and generate the fifth processing rule and the fifth processing rule corresponding to the first Ethernet PDU session according to the access control information.
  • Six processing rules, and the fifth processing rule and the sixth processing rule corresponding to the first Ethernet PDU session, so that the user plane network element can activate or Deactivating the routing rules in the routing rules of the multicast packets of at least one Ether-type multicast group enables the first terminal device to join or exit the Ether-type multicast group.
  • the session management network element is an example of an SMF network element
  • the user plane network element is an example of a UPF network element
  • the terminal device is an example of a UE
  • the access network device is an example of a RAN.
  • Access and mobility management The network element takes the AMF network element as an example.
  • FIG. 10 is a schematic flowchart of a multicast communication method provided by an embodiment of the present application.
  • UE1 may be any terminal device in 5G LAN group 1, and UE1 may join one or more multicast groups.
  • 5G LAN group 1 includes UE1 ⁇ UE8, multicast group 1 includes UE1 ⁇ UE5, and multicast group 2 includes UE6 ⁇ UE8.
  • multicast group 1 and multicast group 2 are Ethernet multicast groups.
  • the following uses UE1 as an example to illustrate the specific process of UE1 joining or exiting an Ethernet-type multicast group.
  • the method shown in Figure 10 may include the following steps:
  • Step 1001 UE1 sends an Ethernet PDU session establishment request message to the SMF network element.
  • the SMF network element receives the Ethernet PDU session establishment request message from UE1.
  • UE1 sends an Ethernet PDU session establishment request message to the SMF network element when an Ethernet PDU session needs to be established.
  • UE1 may send an Ethernet PDU session establishment request message to the SMF network element through the RAN and the AMF network element.
  • UE1 can carry the Ethernet PDU session establishment request message in the non-access stratum (Non-access stratum, NAS) mobility management (mobility management, MM) message, and UE1 sends the NAS MM to the AMF network element through the access network device message, the AMF network element sends the Ethernet PDU session establishment request message to the SMF network element through the N11 message according to the NAS MM message.
  • NAS non-access stratum
  • mobility management mobility management
  • MM mobility management
  • Ethernet PDU session establishment request message may be replaced by other messages, such as an Ethernet PDU session modification message.
  • Step 1002 The SMF network element acquires IGMP indication information.
  • the SMF network element can obtain the IGMP indication information in one or more of the following ways.
  • Mode 1 The SMF network element obtains the IGMP indication information from the Ethernet PDU session establishment request message.
  • the IGMP indication information indicates that UE1 supports the IGMP multicast management protocol, that is, UE1 can send an IGMP message requesting to join or exit the Ethernet type, or it can be described as, the IGMP indication information indicates that IGMP is processed in the Ethernet PDU session of UE1 message.
  • the SMF network element sends a subscription data request message to the UDM network element, and the subscription data request message includes the identifier of UE1.
  • the UDM network element sends a subscription data response message to the SMF network element in response to the subscription data request message, the subscription data response message is the subscription data of UE1, wherein the subscription data of UE1 includes IGMP indication information.
  • the SMF network element can send a Nudm_SDM_Get message to the UDM network element, and the Nudm_SDM_Get message includes the identification of UE1.
  • the UDM network element can send a response message to the SMF network element for the Nudm_SDM_Get message, and the response message for the Nudm_SDM_Get message The message includes subscription data of UE1.
  • UE1's subscription data may include one or more of the following: UE1's identity (for example, subscription permanent identifier (SUPI)), access control information (including the multicast address of the multicast group that UE1 is allowed to join) , for example, the multicast address of multicast group 1) and IGMP indication information.
  • UE1's identity for example, subscription permanent identifier (SUPI)
  • access control information including the multicast address of the multicast group that UE1 is allowed to join
  • the multicast address of multicast group 1 for example, the multicast address of multicast group 1
  • IGMP indication information indicates that UE1 supports the IGMP multicast management protocol.
  • the subscription data may also include other content, which is not limited in this embodiment of the present application.
  • the SMF network element can also judge whether the Ethernet PDU session of UE1 is the Ethernet PDU session of the first member of 5G LAN group 1 on the SMF network element according to the subscription data of UE1. If the SMF network element determines that the Ethernet PDU session of UE1 is the Ethernet PDU session of the first group member of the 5G LAN group 1 on the SMF network element, that is, the 5G LAN group 1 includes UE1 to UE8 and the current UE2 to UE8 have not established an Ethernet PDU session.
  • UE1 is the first group member to establish an Ethernet PDU session in 5G LAN group 1, and the SMF network element can further obtain the subscription data of 5G LAN group 1.
  • the SMF network element sends the subscription data request message to the UDM network element again, and the subscription data request message includes the group identifier of the 5G LAN group 1.
  • the UDM network element sends a subscription data response message to the SMF network element, and the subscription data response message includes the subscription data of 5G LAN group 1.
  • the contract data of 5G LAN group 1 may include one or more of the following:
  • the SMF network element sends a policy data request message to the PCF network element, and the policy data request message includes the identifier of UE1.
  • the PCF network element sends a policy data response message to the SMF network element.
  • the policy data response message includes policy data of UE1, wherein the policy data of UE1 includes IGMP indication information.
  • the SMF network element may send an Npcf_SMPolicyControl message to the PCF network element, and the Npcf_SMPolicyControl message includes the identifier of UE1, and after receiving the Npcf_SMPolicyControl message, the PCF network element may send a response message to the SMF network element for the Npcf_SMPolicyControl message.
  • the response message to the Npcf_SMPolicyControl message includes policy data of UE1.
  • the policy data of UE1 may include the same content as the subscription data of UE1 in the above method 2.
  • the policy data of UE1 may also include other content, which is not limited in this embodiment of the present application.
  • the SMF network element can also obtain the policy data of the 5G LAN group 1, and the policy data of the 5G LAN group 1 can include the same as the multicast group in the above method 2. 1 has the same content as the contract data.
  • the SMF network element can receive secondary authentication data from the data network-authentication, authorization, accounting server (data network-authentication, authorization, accounting, DN-AAA), wherein, the secondary authentication data includes IGMP indication information.
  • the secondary authentication data may also include access control information.
  • the access control information includes the multicast address of the multicast group that UE1 is allowed to join (for example, the multicast address of multicast group 1)
  • the IGMP indication information indicates that UE1 supports the IGMP multicast management protocol.
  • the access control information includes ACL1 [ID of multicast group 1, multicast address of multicast group 1, UE ID list (UE1 ID, UE2 ID, UE3 ID, UE4 ID, UE5 ID)]
  • the IGMP indication information indicates Group members in the multicast group 1 (ie, UE1 to UE5) support the IGMP multicast management protocol.
  • the DN-AAA may perform auxiliary authentication on UE1, that is, the second authentication, and the first authentication may be understood as the authentication of UE1 by the AUSF network element.
  • the SMF network element before the SMF network element sends the Ethernet PDU session establishment completion message to UE1, the SMF network element obtains the IGMP indication information, wherein the Ethernet PDU session establishment completion message indicates that the Ethernet PDU session establishment is successful .
  • the SMF network element obtains IGMP indication information after the Ethernet PDU session is successfully established (that is, after the SMF network element sends the Ethernet PDU session establishment completion message), that is, for the established Ethernet PDU session.
  • the SMF network element receives the subscription data update message from the UDM network element, wherein the subscription data update message includes IGMP indication information.
  • the subscription data update message may be a Nudm_SDM_Notify message.
  • the subscription data update message may include updated subscription data of UE1, and the updated subscription data of UE1 may include the same content as that included in the subscription data of UE1 in the foregoing manner 2.
  • the subscription data update message includes the updated subscription data of 5GLAN group 1, and the updated subscription data of 5GLAN group 1 may be the same as that included in the subscription data of 5GLAN group 1 in mode 2 above.
  • the SMF network element can actively obtain the subscription data, and in mode 5, when the subscription data is updated, the UDM network element can actively send the updated subscription data to the SMF network element.
  • the SMF network element has obtained subscription data before, the previously obtained subscription data may not include IGMP indication information, and the updated subscription data may include IGMP indication information.
  • the UDM network element can send the subscription data update message in any of the following three scenarios.
  • the UDM network element receives group information from the NEF network element, and sends a subscription data update message to the SMF network element according to the group information.
  • the AF network element sends a Nnef_ParameterProvisioning message to the NEF network element, and the Nnef_ParameterProvisioning message includes group information
  • the NEF network element sends a Nudm_ParameterProvisioning message to the UDM network element, and the Nudm_ParameterProvisioning message includes group information.
  • Scenario 2 The UDM network element sends a subscription data update message to the SMF network element according to the locally configured group information.
  • the group information of 5G LAN group 1 is used as an example to illustrate.
  • the IGMP indication information is outside ACL1 and ACL2.
  • the IGMP indication information indicates that the group members in the 5G LAN group 1 support the IGMP multicast management protocol, that is, the group members in the multicast group 1 Members (ie UE1 to UE5) support the IGMP multicast management protocol, and group members in the multicast group 2 (ie UE6 to UE8) support the IGMP multicast management protocol.
  • the IGMP indication information is inside ACL1, and the IGMP indication information is not included inside ACL2. At this time, the IGMP indication information indicates that the group members in the multicast group 1 support the IGMP multicast management protocol.
  • the UDM network element receives the subscription data update request message from the NEF network element.
  • the subscription data update request message includes IGMP indication information, and the UDM network element sends the subscription data update message to the SMF network element according to the subscription data update request message.
  • the AF network element sends the subscription data update message to the UDM network element through the NEF network element.
  • the subscription data update request message includes the IGMP indication information and the identification of the multicast group 1 or the UE ID list corresponding to the IGMP indication information and the group members in the multicast group 1, then the IGMP indication information in the multicast group 1
  • the group members that is, UE1 to UE5) support the IGMP multicast management protocol.
  • the subscription data update request message includes the IGMP indication information and the identifier of the 5G LAN group 1, and then the IGMP indicates that the group members (ie UE1 to UE8) in the 5G LAN group 1 support the IGMP multicast management protocol.
  • the AF network element sends a Nnef_ParameterProvisioning message or an Nnef_IGMPActivation message to the NEF network element, and the NEF network element sends a Nudm_ParameterProvisioning message to the UDM network element.
  • the Nnef_ParameterProvisioning message or the Nnef_IGMPActivation message includes the IGMP indication information and the identification of the multicast group 1, or the IGMP indication information and the UE ID list corresponding to the group members in the multicast group 1, or the IGMP indication information and the identification of the 5G LAN group 1.
  • the Nudm_ParameterProvisioning message includes the information carried in the Nnef_ParameterProvisioning message or the Nnef_IGMPActivation message.
  • the IGMP indication information may adopt any of the following implementation manners: a packet filter for detecting IGMP packets, or indication information for instructing processing of IGMP packets received from UE1 or indicating UE1 Supports the indication information of the IGMP multicast management protocol.
  • the AF network element sends a Nnef_AFSessionWithQoS message to the NEF network element, and the Nnef_AFSessionWithQoS message includes an IP packet filter, or instruction information for instructing to process an IGMP packet received from UE1 or instruction information for instructing UE1 to support the IGMP multicast management protocol.
  • the SMF network element receives a policy data update message from the PCF network element, wherein the policy data update message includes IGMP indication information.
  • the policy data update message may include updated policy data of UE1, and the updated policy data of UE1 may be the same as that included in the subscription data of UE1 in manner 2 above.
  • the policy data update message includes the updated subscription data of the 5GLAN group 1, and the updated policy data of the 5GLAN group 1 may be the same as the content included in the subscription data of the 5GLAN group 1 in the above mode 2.
  • the PCF network element can also send a policy data update message in any of the above three scenarios.
  • the PCF network element can also send a policy data update message in any of the above three scenarios. For details, refer to the relevant content in the above method 5, and the repetition will not be repeated.
  • the AF network element sends a Nnef_ParameterProvisioning message to the NEF network element, and the Nnef_ParameterProvisioning message includes group information
  • the NEF network element sends an Npcf_Policy Authorization message to the PCF network element, and the Npcf_Policy Authorization message includes group information.
  • the SMF network element can obtain the IGMP indication information through at least one of the foregoing ways 1 to 6.
  • the SMF network element can be prioritized according to the following The priority of multiple access control information is determined in order from high to low: the access control information in the policy data, the access control information in the secondary authentication data, the access control information in the subscription data, the SMF network element local Configured access control information.
  • step 1002 is an optional step, and the SMF network element may directly execute step 1003 after receiving the Ethernet PDU session establishment request message from UE1.
  • Step 1003 The SMF network element sets the first processing rule corresponding to the Ethernet PDU session of UE1 on the UPF network element.
  • the SMF network element sets the first processing rule in the N4 session corresponding to the Ethernet PDU session of UE1.
  • the SMF network element generates the first processing rule corresponding to the Ethernet PDU session of UE1, and the SMF network element sends the first processing rule corresponding to the Ethernet PDU session of UE1 and the N4 corresponding to the Ethernet PDU session of UE1 to the UPF network element The ID of the session.
  • the SMF network element sends an N4 session message to the UPF network element, and the N4 session message includes the first processing rule corresponding to the Ethernet PDU session of UE1 and the identifier of the N4 session corresponding to the Ethernet PDU session of UE1.
  • the SMF network element sets the first processing rule corresponding to the Ethernet PDU session of UE1 on the UPF network element according to the IGMP instruction information.
  • the first processing rule corresponding to the Ethernet PDU session of UE1 may include the PDR used to detect the Ethernet message including the IGMP message and the FAR associated with the PDR used to detect the Ethernet message including the IGMP message, or , used to detect the PDR of the Ethernet message including the IGMP message and the URR associated with the PDR used to detect the Ethernet message including the IGMP message.
  • the corresponding first processing rule is set in the N4 session corresponding to the Ethernet PDU session of UE5.
  • the relevant description of setting the corresponding first processing rule in the N4 session corresponding to the Ethernet PDU session of UE1 by the SMF network element please refer to the relevant description of setting the corresponding first processing rule in the N4 session corresponding to the Ethernet PDU session of UE1 by the SMF network element, and the repeated description will not be repeated.
  • the SMF network element can also send access control information to the UPF network element.
  • the SMF network element when the access control information includes the multicast address of the multicast group that UE1 is allowed to join (for example, the multicast address of multicast group 1), the SMF network element can also configure the Access control information is set in the N4 session. Therefore, the UPF network element can judge whether UE1 can join the requested multicast group according to the access control information.
  • the SMF network element can set the access control information in the 5GLAN group-level N4 session. Therefore, the UPF network element can judge whether the terminal device requesting to join the multicast group 1 can join the multicast group 1 according to the access control information, for example, judge whether UE1 can join the multicast group 1, and judge whether UE2 can join the request to join multicast group 1, and determine whether UE3 can join multicast group 1, determine whether UE4 can join multicast group 1, and determine whether UE5 can join multicast group 1, etc.
  • the SMF network element can set access control information in a special module (for example, a PIM module), and the first processing rule should point to this special module.
  • the first indication information and the third indication information need to be sent to the special module, so that it can judge whether the terminal device requesting to join the multicast group 1 can join the multicast group 1.
  • the special module here can be understood as a module in the UPF network element or a module capable of communicating with the UPF network element.
  • Step 1004 UE1 sends an Ethernet message including an IGMP message.
  • the IGMP message includes the address of UE1 and the IP multicast address of the multicast group that UE1 requests to join or exit.
  • Step 1005a The UPF network element determines that the Ethernet message including the IGMP message matches the message detection rule in the first processing rule corresponding to the Ethernet PDU session of UE1, and the UPF network element sends the IGMP message to the SMF network element according to the message processing rule.
  • the Ethernet packet or IGMP packet of the packet The Ethernet packet or IGMP packet of the packet.
  • the first processing rule corresponding to the Ethernet PDU session of UE1 includes a PDR and a FAR associated with the PDR.
  • the UPF detects the Ethernet message including the IGMP message according to the PDR, and sends the Ethernet message or the IGMP message including the IGMP message to the SMF network element according to the FAR associated with the PDR.
  • Step 1006a The SMF network element receives the Ethernet message or the IGMP message including the IGMP message from the UPF network element, the SMF network element parses the IGMP message, and maps the IP multicast address of the multicast group that UE1 requests to join or exit to UE1 The Ethernet multicast address of the multicast group to request to join or leave.
  • Step 1007a The SMF network element authenticates UE1 according to the access control information and the IGMP message.
  • the authentication of UE1 by the SMF network element according to the access control information can be divided into the following possibilities:
  • the SMF network element determines that UE1 has passed the authentication according to the access control information, that is, UE1 can join multicast group 1, and then the SMF network element continues to perform step 1008a.
  • the SMF network element determines that UE1 has passed the authentication according to the access control information, that is, UE1 can exit multicast group 1, and then the SMF network element continues to perform step 1008b.
  • the SMF network element determines that the authentication of UE1 fails according to the access control information, that is, UE1 cannot join the multicast group 2. The SMF network element discards the IGMP message.
  • the SMF network element determines that the authentication of UE1 fails according to the access control information, that is, UE1 does not join the multicast group 2. The SMF network element discards the IGMP message.
  • the access control information here may include the multicast address of the multicast group that UE1 is allowed to join (such as the multicast address of multicast group 1), or ACL1[ID of multicast group 1, multicast group 1 multicast address, UE ID list(UE1 ID, UE2 ID, UE3 ID, UE4 ID, UE5 ID)].
  • ACL1 ID of multicast group 1, multicast address of multicast group 1, UE ID list (UE1 ID, UE2 ID, UE3 ID, UE4 ID, UE5 ID)] includes UE1 ID, it is also necessary to determine UE1
  • the Ethernet PDU session of the 5G LAN group 1 is associated with DNN and S-NSSAI in the subscription data of 5G LAN group 1 or the policy data of 5G LAN group 1.
  • step 1006a and step 1007a is not limited here.
  • Step 1005b The UPF network element determines that the Ethernet message including the IGMP message matches the message detection rule in the first processing rule corresponding to the Ethernet PDU session of UE1, and the UPF network element sends the IGMP message to the SMF network element according to the message processing rule. N4 report generated by the packet.
  • the first processing rule corresponding to the Ethernet PDU session of UE1 includes a PDR and a URR associated with the PDR.
  • the UPF detects the Ethernet message including the IGMP message according to the PDR, and sends the N4 report generated according to the IGMP message to the SMF network element according to the URR associated with the PDR.
  • the N4 report generated according to the IGMP message includes the IP multicast address of the multicast group that UE1 requests to join or exit, continue to execute step 1006b.
  • the UPF network element before the UPF network element sends the N4 report generated according to the IGMP message to the SMF network element according to the message processing rules, the UPF network element can send the IP multicast report of the multicast group that UE1 requests to join or exit The address is mapped to the Ethernet multicast address of the multicast group that UE1 requests to join or exit.
  • the N4 report generated according to the IGMP message includes the Ethernet multicast address of the multicast group that UE1 requests to join or exit.
  • the SMF network element does not need Execute step 1006b, and directly execute step 1007b.
  • the SMF network element can also send the first Two indication information, the second indication information instructs the UPF network element to map the IP multicast address of the multicast group that UE1 requests to join or exit to the Ethernet multicast address of the multicast group that UE1 requests to join or exit.
  • Step 1006b The SMF network element analyzes the N4 report generated according to the IGMP message, and maps the IP multicast address of the multicast group that UE1 requests to join or exit to the Ethernet multicast address of the multicast group that UE1 requests to join or exit.
  • Step 1007b The SMF network element authenticates UE1 according to the access control information and the N4 report generated according to the IGMP message.
  • the authentication of UE1 by the SMF network element according to the access control information can be divided into the following possibilities:
  • the SMF network element determines that UE1 has passed the authentication according to the access control information, that is, UE1 can join multicast group 1, and the SMF network element continues to execute Step 1008a.
  • the SMF network element determines that UE1 has passed the authentication according to the access control information, that is, UE1 can exit multicast group 1, and the SMF network element continues to execute Step 1008b.
  • the SMF network element determines that the authentication of UE1 fails according to the access control information, that is, UE1 cannot join the multicast group 2.
  • the SMF network element discards the N4 report generated according to the IGMP message.
  • the SMF network element determines that the authentication of UE1 fails according to the access control information, that is, UE1 does not join the multicast group 2. The SMF network element discards the N4 report generated according to the IGMP message.
  • step 1007b For the access control information in step 1007b, reference may be made to the relevant description in step 1007a above, and repeated descriptions will not be repeated.
  • the UPF network element can also authenticate UE1 according to the access control information, and the specific authentication method can refer to the above SMF network element Relevant descriptions of authenticating UE1 according to the access control information (ie step 1007a and step 1007b) will not be repeated here.
  • Step 1008a The SMF network element sets the second processing rule corresponding to the Ethernet PDU session of UE1 on the UPF network element.
  • the second processing rule corresponding to the Ethernet PDU session of UE1 may include a routing rule for the Ethernet multicast packet of multicast group 1.
  • the second processing rule corresponding to the Ethernet PDU session of UE1 includes the PDR for detecting the Ethernet multicast packet of the multicast group 1 and the FAR associated with the PDR for detecting the multicast packet of the multicast group 1.
  • the PDR used to detect the Ethernet multicast packet of multicast group 1 is used to match the received packet with the characteristic information of the Ethernet multicast packet of multicast group 1, and detect the PDR of the multicast group 1 that matches the PDR. Ethernet multicast packets.
  • the FAR associated with the PDR used to detect the Ethernet multicast packets of the multicast group 1 is used to control the forwarding of the Ethernet multicast packets of the multicast group 1.
  • the SMF network element sets the second processing rule corresponding to the Ethernet PDU session of UE1 in the N4 session corresponding to the Ethernet PDU session of UE1.
  • the SMF network element generates the second processing rule corresponding to the Ethernet PDU session of UE1, and the SMF network element sends the second processing rule corresponding to the Ethernet PDU session of UE1 and the N4 corresponding to the Ethernet PDU session of UE1 to the UPF network element
  • the ID of the session For example, the SMF network element sends an N4 session message to the UPF network element, and the N4 session message includes the second processing rule corresponding to the Ethernet PDU session of UE1 and the identifier of the N4 session corresponding to the Ethernet PDU session of UE1.
  • the second processing rule corresponding to the Ethernet PDU session of UE1 may include a routing rule for the Ethernet multicast packet of multicast group 1.
  • the second processing rule corresponding to the Ethernet PDU session of UE1 includes the Ethernet multicast address of multicast group 1.
  • the SMF network element may also set a third processing rule corresponding to UE1 on the UPF network element, where the third processing rule includes the IP multicast address of the multicast group 1.
  • the UPF network element maps the IP multicast address of multicast group 1 in the third processing rule to the Ethernet multicast address of multicast group 1, and obtains the second processing rule corresponding to the Ethernet PDU session of UE1.
  • the SMF network element judges whether the UPF network element is serving the multicast group 1 for the first time, and if so, the SMF network element updates the second processing rule in the group-level N4 session corresponding to the 5G LAN group 1 on all UPFs so that other UPFs can send the Ethernet multicast packets of multicast group 1 to this UPF through the N19 tunnel.
  • Step 1008b the SMF network element sends fourth instruction information to the UPF network element, and the fourth instruction information instructs the UPF network element to delete the second processing rule corresponding to the Ethernet PDU session of UE1.
  • the SMF network element sends an N4 session message to the UPF network element, and the N4 session message instructs the UPF network element to delete the second processing rule corresponding to the Ethernet PDU session of UE1.
  • the SMF network element judges whether the UPF network element is the last UPF network element serving the multicast group 1, and if so, the SMF network element deletes all group-level N4 sessions corresponding to the 5G LAN group 1 on the UPF in the second processing rule.
  • the SMF network element can set the first processing rule in the N4 session corresponding to the Ethernet PDU session.
  • the UPF network element receives the Ethernet message including the IGMP message, and sends the first indication information to the SMF network element according to the first processing rule, and the SMF network element receives After the first indication information, a second processing rule is set in the N4 session of the Ethernet PDU session.
  • the UPF network element When the IGMP message is used by UE1 to request to exit the multicast group 1, the UPF network element receives the Ethernet message including the IGMP message, and sends the third indication information to the SMF network element according to the first processing rule, and the SMF network element receives After the third indication information, the second processing rule is deleted in the N4 session of the Ethernet PDU session. Therefore, UE1 can dynamically join or exit multicast group 1 .
  • FIG. 11 is a schematic flowchart of a multicast communication method provided by an embodiment of the present application.
  • UE1 can be any terminal device in 5G LAN group 1, and UE1 can join one or more multicast groups.
  • 5G LAN group 1 includes UE1 ⁇ UE8, multicast group 1 includes UE1 ⁇ UE5, and multicast group 2 includes UE6 ⁇ UE8.
  • multicast group 1 and multicast group 2 are Ethernet multicast groups.
  • the following uses UE1 as an example to illustrate the specific process of UE1 joining or exiting an Ethernet-type multicast group.
  • the method shown in Figure 11 may include the following steps:
  • steps 1101 to 1102 reference may be made to the above steps 1001 to 1002, and repeated descriptions will not be repeated.
  • Step 1103 the SMF network element acquires access control information.
  • the SMF network element can obtain the access control information.
  • Step 1104 The SMF network element sets the fifth processing rule corresponding to the Ethernet PDU session of UE1 on the UPF network element, and sets the sixth processing rule corresponding to the Ethernet PDU session of UE1 on the UPF network element according to the access control information, and the Ethernet PDU session of UE1
  • the sixth processing rule corresponding to the PDU session is in a deactivated state.
  • the SMF network element sets the fifth processing rule corresponding to the Ethernet PDU session of UE1 on the UPF network element according to the IGMP instruction information.
  • the fifth processing rule corresponding to the Ethernet PDU session of UE1 may include a first PDR and a first FAR associated with the first PDR, and a second PDR and a second FAR associated with the second PDR.
  • the first PDR is used by the UPF network element to detect the message for UE1 requesting to join the Ethernet type multicast group
  • the first FAR associated with the first PDR is used to instruct the UPF network element to add the UE1 request to join the Ethernet type group
  • the routing rule of the Ethernet multicast packet of the multicast group is changed from the deactivated state to the activated state.
  • the second PDR is used by the UPF network element to detect the message for UE1 requesting to exit the Ethernet-type multicast group, and the second FAR associated with the second PDR is used to instruct the UPF network element to request the UE1 to exit the Ethernet-type multicast group
  • the routing rule of the Ethernet multicast packet is set from the activated state to the deactivated state.
  • the sixth processing rule corresponding to the Ethernet PDU session of UE1 may include routing rules for Ethernet multicast packets of at least one Ethernet-type multicast group indicated by the access control information, and at least one Ethernet-type multicast group’s Ethernet The routing rules for multicast packets are all deactivated.
  • the access control information includes ACL1 [ID of multicast group 1, multicast address of multicast group 1, UE ID list (UE1 ID, UE2 ID, UE3 ID, UE4 ID, UE5 ID)], then UE1's Ethernet
  • the sixth processing rule corresponding to the PDU session may also include routing rules and status indication information of the Ethernet multicast message of the multicast group 1, and the status indication information indicates that the routing rule of the Ethernet multicast message of the multicast group 1 is in a deactivated state .
  • the sixth processing rule corresponding to the Ethernet PDU session of UE1 includes the routing rule and bitmap of the Ethernet multicast packet of multicast group 1, and the bitmap corresponds to the routing rule of the Ethernet multicast packet of multicast group 1 If the bit of is set to 0, it indicates that the routing rule of the Ethernet multicast packet of multicast group 1 is deactivated.
  • the SMF network element can send the fifth processing rule and the sixth processing rule corresponding to the Ethernet PDU session of UE1 to the UPF network element at the same time, or separately send the fifth processing rule and the sixth processing rule corresponding to the Ethernet PDU session of UE1 rule.
  • the SMF network element sends an N4 session message to the UPF network element, and the N4 session message includes the fifth processing rule and the sixth processing rule corresponding to the Ethernet PDU session of UE1.
  • the N4 session message also includes the identifier of the N4 session corresponding to the Ethernet PDU session of UE1.
  • the SMF network element sends the first N4 session message to the UPF network element, the first N4 session message includes the fifth processing rule corresponding to the Ethernet PDU session of UE1, and the SMF network element also sends the second N4 session message to the UPF network element, The second N4 session message includes the sixth processing rule corresponding to the Ethernet PDU session of UE1.
  • the first N4 session message and the second N4 session message also include the identifier of the N4 session corresponding to the Ethernet PDU session of UE1.
  • step 1105 reference may be made to step 1004, and repeated descriptions will not be repeated.
  • Step 1106a When the IGMP message is used by UE1 to request to join the multicast group 1, the UPF network element determines that the Ethernet message including the IGMP message matches the first PDR, and then sends the multicast message according to the first FAR that matches the first PDR. The routing rules of the Ethernet multicast packets of group 1 are set from the deactivated state to the activated state.
  • the UPF network element determines that the Ethernet message including the IGMP message matches the first PDR, the UPF network element converts the IP multicast address of the multicast group 1 into the Ethernet multicast address of the multicast group 1.
  • the SMF network element also sends access control information to the UPF network element, the UPF network element authenticates the UE1 according to the access control information.
  • the UPF network element determines that UE1 has passed the authentication according to the access control information, that is, UE1 can join multicast group 1, and the UPF network element determines the Address index to the routing rule of the Ethernet multicast message of the multicast group 1, and set the routing rule of the Ethernet multicast message of the multicast group 1 from the deactivated state to the active state according to the first FAR matched with the first PDR .
  • the specific authentication process reference may be made to the above step 1007a, and repeated descriptions will not be repeated here.
  • Step 1106b When the IGMP message is used by UE1 to request to exit the multicast group 1, the UPF network element determines that the Ethernet message including the IGMP message matches the second PDR, and sends the multicast message according to the second FAR that matches the second PDR.
  • the routing rules for the Ethernet multicast packets of group 1 are set from the activated state to the deactivated state.
  • the UPF network element determines that the Ethernet message including the IGMP message matches the first PDR, the UPF network element converts the IP multicast address of the multicast group 1 into the Ethernet multicast address of the multicast group 1.
  • the SMF network element also sends access control information to the UPF network element, the UPF network element authenticates the UE1 according to the access control information.
  • the SMF network element determines that UE1 has passed the authentication according to the access control information, that is, UE1 can withdraw from multicast group 1, and the UPF network element determines the The address is indexed to the routing rule of the Ethernet multicast packet of the multicast group 1, and the routing rule of the Ethernet multicast packet of the multicast group 1 is set from an active state to an active state according to the second FAR matched with the second PDR.
  • the specific authentication process reference may be made to the above step 1007a, and repeated descriptions will not be repeated here.
  • the SMF network element sends the access control information to the UPF network element.
  • the SMF network element sends the access control information to the UPF network element.
  • the SMF network element can set the fifth processing rule and the sixth processing rule in the N4 session corresponding to the Ethernet PDU session.
  • the UPF network element receives the Ethernet message including the IGMP message, and deactivates the routing rule of the multicast message of the multicast group 1 according to the fifth processing rule state is set to active state.
  • the UPF network element receives the Ethernet message including the IGMP message, and changes the routing rule of the multicast message of the multicast group 1 from the active state according to the fifth processing rule. Set to deactivated state. Therefore, UE1 can dynamically join or exit multicast group 1 .
  • FIG. 12 is a schematic flowchart of a multicast communication method provided by an embodiment of the present application.
  • UE1 may be any terminal device in 5G LAN group 1, and UE1 may join one or more multicast groups.
  • 5G LAN group 1 includes UE1 ⁇ UE8, multicast group 1 includes UE1 ⁇ UE5, and multicast group 2 includes UE6 ⁇ UE8.
  • multicast group 1 and multicast group 2 are Ethernet multicast groups.
  • the following uses UE1 as an example to illustrate the specific process of UE1 joining or exiting an Ethernet-type multicast group.
  • the method shown in Figure 12 may include the following steps:
  • steps 1201 to 1202 reference may be made to the above steps 1001 to 1002, and repeated descriptions will not be repeated.
  • Step 1203 The SMF network element sets the third processing rule corresponding to the Ethernet PDU session of UE1 on the UPF network element.
  • the SMF network element sets the third processing rule corresponding to the Ethernet PDU session of UE1 on the UPF network element according to the IGMP instruction information.
  • the third processing rule corresponding to the Ethernet PDU session of UE1 may include a third packet detection rule and a third packet processing rule, and the third packet detection rule may be used to detect Ethernet packets including IGMP packets PDR, the third packet processing rule is used by the UPF network element to manage the fourth processing rule corresponding to the Ethernet PDU session of UE1.
  • the fourth processing rule corresponding to the Ethernet PDU session of UE1 includes the MAC address forwarding table corresponding to the Ethernet multicast address of the multicast group associated with the detected Ethernet message including the IGMP message, or the MAC address forwarding table corresponding to the detected Including the routing rules for the Ethernet multicast packets of the multicast group associated with the Ethernet packets of the IGMP packets.
  • the SMF network element executes step 1202
  • the SMF network element sets the third processing rule corresponding to the Ethernet PDU session of UE1 on the UPF network element according to the IGMP instruction information.
  • step 1204 reference may be made to step 1004, and repeated descriptions will not be repeated.
  • Step 1205a When the IGMP message is used by UE1 to request to join the multicast group 1, the UPF network element determines that the Ethernet message including the IGMP message matches the third message detection rule, and then creates a multicast according to the third message processing rule Routing rules for Ethernet multicast packets of group 1.
  • the UPF network element determines that the Ethernet packet including the IGMP packet matches the third packet detection rule, the UPF network element converts the IP multicast address of the multicast group 1 into the Ethernet multicast address of the multicast group 1 address.
  • the SMF network element also sends access control information to the UPF network element, the UPF network element authenticates the UE1 according to the access control information. For example, when the IGMP message indicates that UE1 requests to join multicast group 1, the UPF network element determines that UE1 passes the authentication according to the access control information, that is, UE1 can join multicast group 1. For the specific authentication process, reference may be made to the above step 1007a, and repeated descriptions will not be repeated here.
  • the UPF network element creates a routing rule for the Ethernet multicast message of the multicast group 1 in the N4 session corresponding to the Ethernet PDU session of the UE1 according to the third message processing rule.
  • Step 1205b When the IGMP message is used by UE1 to request to exit the multicast group 1, the UPF network element determines that the Ethernet message including the IGMP message matches the third message detection rule, and deletes the multicast message according to the third message processing rule Routing rules for Ethernet multicast packets of group 1.
  • the UPF network element determines that the Ethernet packet including the IGMP packet matches the third packet detection rule, the UPF network element converts the IP multicast address of the multicast group 1 into the Ethernet multicast address of the multicast group 1 address.
  • the SMF network element also sends access control information to the UPF network element, the UPF network element authenticates the UE1 according to the access control information. For example, when the IGMP message indicates that UE1 requests to exit multicast group 1, the SMF network element determines that UE1 passes the authentication according to the access control information, that is, UE1 can exit multicast group 1.
  • the specific authentication process reference may be made to the above step 1007a, and repeated descriptions will not be repeated here.
  • the UPF network element indexes the routing rules of the Ethernet multicast packets of multicast group 1 in the N4 session corresponding to the Ethernet PDU session of UE1, and deletes the Ethernet multicast packets of multicast group 1. Packet routing rules.
  • the fourth processing rule corresponding to the Ethernet PDU session of UE1 is the routing rule of the Ethernet multicast message of the multicast group 1, and in addition, the SMF network element sends the access control to the UPF network element
  • the SMF network element sends the access control to the UPF network element
  • Step 1205c When the IGMP message is used by UE1 to request to exit or join multicast group 1, the UPF network element determines that the Ethernet message including the IGMP message matches the third message detection rule, and then updates according to the third message processing rule MAC address forwarding table corresponding to the Ethernet multicast address of multicast group 1.
  • the UPF network element determines that the Ethernet packet including the IGMP packet matches the third packet detection rule, the UPF network element converts the IP multicast address of the multicast group 1 into the Ethernet multicast address of the multicast group 1 address.
  • the UPF network element updates the MAC address forwarding table corresponding to the Ethernet multicast address of multicast group 1 according to the Ethernet multicast address of multicast group 1, That is, the correspondence between the multicast address of the multicast group 1 and the N4 session corresponding to the Ethernet PDU session of UE1 is deleted in the MAC address forwarding table. If the MAC address forwarding table only includes the correspondence between the multicast address of multicast group 1 and the N4 session corresponding to the Ethernet PDU session of UE1, the UPF deletes the MAC address forwarding table.
  • the UPF network element updates the MAC address forwarding table corresponding to the Ethernet multicast address of multicast group 1 according to the Ethernet multicast address of multicast group 1, That is, a corresponding relationship between the multicast address of the multicast group 1 and the N4 session corresponding to the Ethernet PDU session of UE1 is established in the MAC address forwarding table. If the UPF network element does not save the MAC address forwarding table, the UPF network element creates a MAC address forwarding table, and adds the multicast address of the multicast group 1 and the N4 session corresponding to the Ethernet PDU session of UE1 to the MAC address forwarding table. corresponding relationship.
  • step 1205c For the specific authentication process of UE1 in step 1205c, reference may be made to the above step 1205a and step 1205b, and repeated descriptions will not be repeated.
  • the fourth processing rule corresponding to the Ethernet PDU session of UE1 is the MAC address forwarding table corresponding to the Ethernet multicast address of the multicast group 1 .
  • the SMF network element can set the third processing rule in the N4 session corresponding to the Ethernet PDU session, and the UPF network element receives the Ethernet message including the IGMP message, Determine that the Ethernet packet including the IGMP packet matches the third packet detection rule.
  • the UPF network element creates the Ethernet packet of multicast group 1 according to the third packet processing rule. Routing rules for multicast packets.
  • the UPF network element deletes the routing rule of the Ethernet multicast message of the multicast group 1 according to the third message processing rule.
  • the UPF network element receives the Ethernet message including the IGMP message, determines that the Ethernet message including the IGMP message matches the third message detection rule, and the UPF network element updates the Ethernet message of the multicast group 1 according to the third message processing rule.
  • MAC address forwarding table corresponding to the multicast address. Therefore, UE1 can dynamically join or exit multicast group 1 .
  • Fig. 13 shows a possible exemplary block diagram of an apparatus involved in the embodiment of the present application.
  • the apparatus 1300 includes: a transceiver module 1310 and a processing module 1320, and the transceiver module 1310 may include a receiving unit and a sending unit.
  • the processing module 1320 is used to control and manage the actions of the device 1300 .
  • the transceiver module 1310 is used to support the communication between the apparatus 1300 and other network entities.
  • the device 1300 may further include a storage unit for storing program codes and data of the device 1300 .
  • each module in the apparatus 1300 may be implemented by software.
  • the processing module 1320 may be a processor or a controller, such as a general-purpose central processing unit (central processing unit, CPU), a general-purpose processor, digital signal processing (digital signal processing, DSP), an application-specific integrated circuit (application specific integrated circuits, ASIC), field programmable gate array (field programmable gate array, FPGA) or other programmable logic devices, transistor logic devices, hardware components or any combination thereof. It can realize or execute various exemplary logical blocks, modules and circuits described in conjunction with the disclosed content of the embodiments of the present application.
  • the processor may also be a combination of computing functions, for example, a combination of one or more microprocessors, a combination of DSP and a microprocessor, and so on.
  • the transceiver module 1310 may be a communication interface, a transceiver or a transceiver circuit, etc., wherein the communication interface is collectively referred to as, in a specific implementation, the communication interface may include multiple interfaces, and the storage unit may be a memory.
  • the processing module 1320 in the device 1300 can support the device 1300 to perform the actions of the session management network element in each method example above, for example, the processing module 1320 can support the device 1300 Execute step 1002, step 1006a, step 1007a, step 1006b, and step 1007b in FIG. 10 .
  • the transceiver module 1310 can support the communication between the device 1300 and the user plane network element or terminal equipment.
  • the transceiver module 1310 can support the device 1300 to execute step 700, step 710, step 730, step 740 in FIG. Step 1001, step 1003, step 1005a, step 1005b, step 1008a, step 1008b.
  • the device 1300 includes:
  • the transceiver module 1310 invokes the processing module 1320 to execute: receiving an Ethernet PDU session establishment message from the first terminal device, the Ethernet PDU session establishment message being used to request establishment of a first Ethernet PDU session; sending the The first processing rule corresponding to the first Ethernet PDU session, the first processing rule is used to instruct the user plane network element to process the first type of message received from the first terminal device, and the first type
  • the message is used for the first terminal device to request to join or exit the Ethernet-type multicast group, and the first processing rule includes a first message detection rule and a first message processing rule, and the first message detection rule A rule is used to detect the first type of packet, and the first packet processing rule is used to instruct to report the detected first type of packet to the session management network element.
  • the device 1300 may correspond to the session management network element in the foregoing method embodiments, and the operations and/or functions of the various modules in the device 1300 are to implement the session management network element in the foregoing method embodiments.
  • the corresponding steps of the method can therefore also achieve the beneficial effects of the foregoing method embodiments, and for the sake of brevity, details are not described here.
  • the processing module 1320 in the device 1300 can support the device 1300 to execute the actions of the user plane network element in the above method examples.
  • the transceiver module 1310 may support the communication between the apparatus 1300 and the terminal equipment or the session management network element.
  • the transceiver module 1310 may support the apparatus 1300 to execute step 710, step 720, step 730, step 740 in FIG. Step 1003, step 1005a, step 1005b, step 1008a, step 1008b.
  • the transceiver module 1310 is configured to: receive the first processing rule of the first Ethernet PDU session from the session management function network element, and the first Ethernet PDU session is an Ethernet PDU session requested by the first terminal device to be established , the first processing rule is used by the user plane network element to process a first type of message received from the first terminal device, and the first type of message is used by the first terminal device to request to join Or exit the multicast group of the Ethernet type, the first processing rule includes a first packet detection rule and a first packet processing rule, and the first packet detection rule is used to detect a first type of packet, and the The first packet processing rule is used to report the detected packet of the first type to the session management network element; receive a first packet from the first terminal device, and the first packet indicates the The first terminal device requests to join a first multicast group, the first message is a message of the first type, and the first multicast group is a multicast group of the Ethernet type;
  • the processing module 1320 is configured to determine that the first packet matches the first packet detection rule, and control the transceiver module 1310 to send the first packet to the session management function network element according to the first packet processing rule.
  • Indication information where the first indication information includes the first message or the N4 report generated according to the first message.
  • the device 1300 may correspond to the method of the user plane network element in the foregoing method embodiments, and the operations and/or functions of each module in the device 1300 are to realize the user plane network elements in the foregoing method embodiments respectively. Therefore, the beneficial effects in the foregoing method embodiments can also be achieved, and for the sake of brevity, details are not described here.
  • Fig. 14 shows a schematic structural diagram of a communication device 1400 according to an embodiment of the present application.
  • the apparatus 1400 includes: a processor 1401 .
  • the device 1400 is a session management function network element or a chip in a session management function network element, in a possible implementation manner, when the processor 1401 is used to call an interface to perform the following actions:
  • Ethernet PDU session establishment message from the first terminal device, where the Ethernet PDU session establishment message is used to request establishment of a first Ethernet PDU session; send the first processing rule corresponding to the first Ethernet PDU session to a user plane network element, so The first processing rule is used to instruct the user plane network element to process the first type of message received from the first terminal device, and the first type of message is used for the first terminal device to request to join Or exit the multicast group of the Ethernet type, the first processing rule includes a first message detection rule and a first message processing rule, and the first message detection rule is used to detect the first type of message, The first packet processing rule is used to instruct to report the detected packet of the first type to the session management network element.
  • apparatus 1400 may also be used to perform other steps and/or operations on the network element side of the session management function in the foregoing embodiments, and details are not described here for brevity.
  • the device 1400 is a user plane network element or a chip in a user plane network element
  • the processor 1401 is used to call an interface to perform the following actions:
  • the first processing rule for a first Ethernet PDU session from a session management function network element, the first Ethernet PDU session is an Ethernet PDU session requested by a first terminal device, and the first processing rule is used for the user plane network Meta-processing the first type of message received from the first terminal device, the first type of message is used for the first terminal device to request to join or exit the Ethernet type multicast group, the first processing The rules include a first packet detection rule and a first packet processing rule, the first packet detection rule is used to detect a first type of packet, and the first packet processing rule is used to report to the session management network The first type of message detected by meta-reporting; receiving a first message from the first terminal device, the first message indicating that the first terminal device requests to join the first multicast group, the The first message is a message of the first type, and the first multicast group is a multicast group of the Ethernet type; it is determined that the first message matches the first message detection rule, according to The first packet processing rule sends first indication information to the session management function network element, where
  • apparatus 1400 may also be used to perform other steps and/or operations on the user plane network element side in the foregoing embodiments, and details are not described here for brevity.
  • the processor 1401 may call an interface to perform the above sending and receiving action, where the called interface may be a logical interface or a physical interface, which is not limited thereto.
  • the physical interface can be implemented through a transceiver.
  • the apparatus 1400 further includes a transceiver 1403 .
  • the apparatus 1400 further includes a memory 1402, and the memory 1402 may store the program codes in the foregoing method embodiments, so as to be called by the processor 1401.
  • the apparatus 1400 includes a processor 1401, a memory 1402, and a transceiver 1403, the processor 1401, the memory 1402, and the transceiver 1403 communicate with each other through an internal connection path to transmit control and/or data signals.
  • the processor 1401, the memory 1402, and the transceiver 1403 may be implemented by a chip, and the processor 1401, the memory 1402, and the transceiver 1403 may be implemented in the same chip, or may be implemented in different chips respectively, Or a combination of any two of these functions can be implemented in one chip.
  • the memory 1402 may store program codes, and the processor 1401 calls the program codes stored in the memory 1402 to implement corresponding functions of the apparatus 1400 .
  • a processor may be an integrated circuit chip with signal processing capabilities.
  • each step of the above-mentioned method embodiment may be completed by an integrated logic circuit of hardware in a processor or an instruction in the form of software.
  • the above-mentioned processor can be a general-purpose processor, a digital signal processor (digital signal processor, DSP), an application specific integrated circuit (application specific integrated circuit, ASIC), an off-the-shelf programmable gate array (field programmable gate array, FPGA) or other available Programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, system on chip (system on chip, SoC), central processor unit (central processor unit, CPU), or network processor (network processor, NP), can also be a digital signal processing circuit (digital signal processor, DSP), can also be a microcontroller (micro controller unit, MCU), can also be a programmable controller (programmable logic device, PLD) or other Integrated chip.
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • FPGA off-the-shelf programmable gate array
  • FPGA field programmable gate array
  • Programmable logic devices discrete gate or transistor logic devices, discrete hardware components, system on chip (system on chip, SoC), central processor unit
  • a general-purpose processor may be a microprocessor, or the processor may be any conventional processor, or the like.
  • the steps of the method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor.
  • the software module can be located in a mature storage medium in the field such as random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, register.
  • the storage medium is located in the memory, and the processor reads the information in the memory, and completes the steps of the above method in combination with its hardware.
  • the memory in the embodiments of the present application may be a volatile memory or a nonvolatile memory, or may include both volatile and nonvolatile memories.
  • the non-volatile memory can be read-only memory (read-only memory, ROM), programmable read-only memory (programmable ROM, PROM), erasable programmable read-only memory (erasable PROM, EPROM), electrically programmable Erases programmable read-only memory (electrically EPROM, EEPROM) or flash memory.
  • Volatile memory can be random access memory (RAM), which acts as external cache memory.
  • RAM random access memory
  • SRAM static random access memory
  • DRAM dynamic random access memory
  • DRAM synchronous dynamic random access memory
  • SDRAM double data rate synchronous dynamic random access memory
  • ESDRAM enhanced synchronous dynamic random access memory
  • SLDRAM direct memory bus random access memory
  • direct rambus RAM direct rambus RAM
  • sequence numbers of the above-mentioned processes do not mean the order of execution, and the order of execution of the processes should be determined by their functions and internal logic.
  • the various numerical numbers or serial numbers involved in the above-mentioned various processes are only for convenience of description, and shall not constitute any limitation to the implementation process of the embodiment of the present application.
  • the above is an example of the three elements of A, B and C to illustrate the optional items of the project.
  • the expression includes at least one of the following: A, B, ..., and X"
  • the applicable entries for this item can also be obtained according to the aforementioned rules.
  • the disclosed systems, devices and methods may be implemented in other ways.
  • the device embodiments described above are only illustrative.
  • the division of the units is only a logical function division. In actual implementation, there may be other division methods.
  • multiple units or components can be combined or May be integrated into another system, or some features may be ignored, or not implemented.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit.
  • the functions described above are realized in the form of software function units and sold or used as independent products, they can be stored in a computer-readable storage medium.
  • the technical solution of the present application is essentially or the part that contributes to the prior art or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in the various embodiments of the present application.
  • the aforementioned storage medium includes: U disk, mobile hard disk, read-only memory ROM, random access memory RAM, magnetic disk or optical disk, and other media capable of storing program codes.

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Abstract

L'invention concerne un dispositif et un procédé de communication en multidiffusion, le procédé comprenant les étapes suivantes dans lesquelles : un élément de réseau de gestion de session reçoit, en provenance d'un premier équipement terminal, un message d'établissement de session d'unité de données de protocole (PDU) Ethernet, le message d'établissement de session de PDU Ethernet étant utilisé pour demander d'établir une première session de PDU Ethernet ; l'élément de réseau de gestion de session envoie, à un élément de réseau de plan d'utilisateur, une première règle de traitement correspondant à la première session de PDU Ethernet, la première règle de traitement étant utilisée pour ordonner à l'élément de réseau de plan d'utilisateur de traiter un premier type de paquet reçu en provenance d'un premier équipement terminal, et le premier type de paquet étant utilisé pour un premier équipement terminal pour demander de rejoindre ou de quitter un groupe de multidiffusion de type Ethernet ; la première règle de traitement comprend une première règle de détection de paquet et une première règle de traitement de paquet, la première règle de détection de paquet étant utilisée pour détecter un premier type de paquet, et la première règle de traitement de paquet étant utilisée pour ordonner de rapporter le premier type de paquet détecté à l'élément de réseau de gestion de session. L'utilisation du procédé ci-dessus permet à un premier équipement terminal de rejoindre ou de quitter un groupe de multidiffusion de type Ethernet.
PCT/CN2022/108671 2021-07-29 2022-07-28 Dispositif et procédé de communication en multidiffusion WO2023006042A1 (fr)

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CN105635249A (zh) * 2015-12-18 2016-06-01 小米科技有限责任公司 会话管理方法及装置
CN109672549A (zh) * 2017-10-16 2019-04-23 中兴通讯股份有限公司 管理方法及装置、网关控制面网元、通信系统及存储介质
CN111010673A (zh) * 2018-10-08 2020-04-14 华为技术有限公司 一种通信方法及装置
CN111770537A (zh) * 2019-01-11 2020-10-13 Oppo广东移动通信有限公司 用于资源建立的方法及设备
CN113133131A (zh) * 2019-12-31 2021-07-16 华为技术有限公司 一种通信方法及装置

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CN105635249A (zh) * 2015-12-18 2016-06-01 小米科技有限责任公司 会话管理方法及装置
CN109672549A (zh) * 2017-10-16 2019-04-23 中兴通讯股份有限公司 管理方法及装置、网关控制面网元、通信系统及存储介质
CN111010673A (zh) * 2018-10-08 2020-04-14 华为技术有限公司 一种通信方法及装置
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