US 12,231,992 B2
Multicast communication method and related apparatus based on user equipment (UE) route selection policy
Chunshan Xiong, Shenzhen (CN)
Assigned to TENCENT TECHNOLOGY (SHENZHEN) COMPANY LIMITED, Shenzhen (CN)
Filed by TENCENT TECHNOLOGY (SHENZHEN) COMPANY LIMITED, Shenzhen (CN)
Filed on Mar. 28, 2022, as Appl. No. 17/706,501.
Application 17/706,501 is a continuation of application No. PCT/CN2021/085586, filed on Apr. 6, 2021.
Claims priority of application No. 202010403660.X (CN), filed on May 13, 2020.
Prior Publication US 2022/0225058 A1, Jul. 14, 2022
Int. Cl. H04W 4/06 (2009.01); H04L 12/18 (2006.01); H04W 8/18 (2009.01); H04W 8/26 (2009.01); H04W 72/30 (2023.01)
CPC H04W 4/06 (2013.01) [H04L 12/189 (2013.01); H04W 8/18 (2013.01); H04W 8/26 (2013.01); H04W 72/30 (2023.01)] 12 Claims
OG exemplary drawing
 
1. A multicast communication method implemented by a user equipment (UE), including:
receiving UE route selection policy (URSP) information transmitted by a policy control function entity, the URSP information including a URSP rule supporting a multicast service; and
querying, in the URSP rule supporting the multicast service received by the UE and according to a multicast network address corresponding to a multicast service context that needs to be activated, network slice information and data network name information;
wherein Multicast and Broadcast Service (MBS) context information of the user equipment is activated through an MBS Application Function (AF) based on the network slice information and the data network name information, and the user equipment is added to a multicast group corresponding to the multicast network address for multicast communication,
wherein the URSP rule in the URSP information includes connection capabilities information and an IP descriptor, and one of the following is true:
the IP descriptor includes a first IP address descriptor for an MBS or multicast service describing a destination IP address 2-tuple, and the destination IP address 2-tuple includes the multicast network address and an IGMP protocol above an IP protocol;
the IP descriptor includes a second IP address descriptor for describing a destination IP address 3-tuple, and the destination IP address 3-tuple includes: an IP address or IPV6 network prefix, a port number, and a protocol identifier of a protocol above an IP protocol, wherein, when a destination IP address 3-tuple described by a second IP address descriptor in a first URSP rule includes the multicast network address and an IGMP protocol and does not include a port number, the first URSP rule is determined as the URSP rule supporting the multicast service;
a value of the connection capabilities information includes a code value indicating multicast communication, wherein, when a value of connection capabilities information in a second URSP rule is a code value indicating multicast communication and a destination IP address 3-tuple described by an IP address descriptor in the second URSP rule includes the multicast network address and an IGMP protocol and does not include a port number, the second URSP rule is determined as the URSP rule supporting the multicast service;
the IP descriptor includes the first IP address descriptor, and the value of the connection capabilities information is the code value indicating multicast communication;
the value of the connection capabilities information includes a code value indicating multicast communication or broadcast communication, wherein, when a value of a connection capabilities information in a third URSP rule is the code value indicating multicast communication, the third URSP rule is determined as a URSP rule supporting the multicast service through a downlink transmission;
the IP descriptor includes a third IP address descriptor for an MBS or multicast service or broadcast service, the third IP address descriptor describes a downlink destination IP address 3-tuple, and the downlink destination IP address 3-tuple includes: a multicast network address or a broadcast network address, a port number, and a protocol identifier of a protocol above an IP protocol, wherein, when a downlink destination IP address 3-tuple described by a third IP address descriptor in a fourth URSP rule includes a multicast network address, the fourth URSP rule is determined as the URSP rule supporting the multicast service through a downlink transmission; or
the value of the connection capabilities information includes a code value indicating multicast communication or broadcast communication, wherein, when a value of connection capabilities information in a fifth URSP rule is a code value indicating multicast communication and a third IP address descriptor for an MBS or multicast service or broadcast service in the fifth URSP rule includes a multicast network address, a port number, and a protocol identifier of a protocol above an IP protocol, the fifth URSP rule is determined as the URSP rule supporting the multicast service through downlink transmission.