Data transmission method and apparatus

Patent metadata

Field	Value
Publication number	US-2021029514-A1
Application number	US-202017071597-A
Country	US
Kind code	A1
Filing date	Oct 15, 2020
Priority date	Apr 16, 2018
Publication date	Jan 28, 2021
Grant date	—

Abstract

This application provides a data transmission method and an apparatus, and relates to the field of communications technologies. The method includes: receiving, by a wireless communications apparatus, a multicast data packet from a first terminal, where the multicast data packet includes service data and an identifier of a first multicast group; determining, by the wireless communications apparatus, an identifier of a second terminal based on the identifier of the first multicast group and a correspondence between the identifier of the first multicast group and the identifier of the second terminal; and sending, by the wireless communications apparatus, the service data to the second terminal based on the identifier of the second terminal.

First claim

What is claimed is:

1 . A data transmission method, wherein the method comprises:
receiving, by a wireless communications apparatus, a multicast data packet from a first terminal, wherein the multicast data packet comprises service data and an identifier of a first multicast group; determining, by the wireless communications apparatus, an identifier of a second terminal based on the identifier of the first multicast group and a correspondence between the identifier of the first multicast group and the identifier of the second terminal; and sending, by the wireless communications apparatus, the service data to the second terminal based on the identifier of the second terminal.

2 . The method according to claim 1 , wherein the identifier of the first multicast group is an internet protocol, IP address of the first multicast group, and the identifier of the second terminal is an IP address of the second terminal.

3 . The method according to claim 2 , wherein the sending, by the wireless communications apparatus, the service data to the second terminal based on the identifier of the second terminal comprises:
changing, by the wireless communications apparatus, a destination IP address of the multicast data packet to the IP address of the second terminal, to obtain a unicast packet, wherein the unicast packet comprises the service data; and sending, by the wireless communications apparatus, the unicast packet to the second terminal based on the IP address of the second terminal.

4 . The method according to claim 1 , wherein the identifier of the first multicast group is an IP address of the first multicast group, and the identifier of the second terminal is a general packet radio service tunneling protocol, GTP tunnel address of the second terminal; and
the sending the service data to the second terminal comprises: sending the multicast data packet to the second terminal based on the GTP tunnel address of the second terminal.

5 . The method according to claim 1 , wherein the wireless communications apparatus is a central unit, CU.

6 . The method according to claim 1 , wherein the method further comprises:
receiving, by the wireless communications apparatus, a multicast joining packet from the second terminal, wherein the multicast joining packet comprises the identifier of the first multicast group and the identifier of the second terminal; and adding, by the wireless communications apparatus based on the identifier of the first multicast group and the identifier of the second terminal, the correspondence between the identifier of the first multicast group and the identifier of the second terminal.

7 . The method according to claim 1 , wherein the method further comprises:
receiving, by the wireless communications apparatus, a multicast leaving packet from the second terminal, wherein the multicast leaving packet comprises the identifier of the first multicast group and the identifier of the second terminal; and deleting, by the wireless communications apparatus based on the identifier of the first multicast group and the identifier of the second terminal, the correspondence between the identifier of the first multicast group and the identifier of the second terminal.

8 . The method according to claim 1 , wherein there are a plurality of second terminals.

9 . A data transmission method, wherein the method comprises:
determining, by a wireless communications apparatus, a multicast data packet; and sending, by the wireless communications apparatus, the multicast data packet to an access network device, wherein the multicast data packet comprises service data and an identifier of a first multicast group, and the multicast data packet is to be sent to a member of the first multicast group in a unicast manner.

10 . The method according to claim 9 , wherein the method further comprises:
sending, by the wireless communications apparatus, a multicast joining packet to the access network device, wherein the multicast joining packet carries the identifier of the first multicast group and an identifier of the wireless communications apparatus, and the multicast joining packet is used for adding the wireless communications apparatus to the first multicast group.

11 . The method according to claim 9 , wherein the method further comprises:
sending, by the wireless communications apparatus, a multicast leaving packet to the access network device, wherein the multicast leaving packet carries the identifier of the first multicast group and an identifier of the wireless communications apparatus, and the multicast leaving packet is used for deleting the wireless communications apparatus from the first multicast group.

12 . The method according to claim 9 , wherein there are a plurality of members in the first multicast group.

13 . An apparatus, comprising at least one processor and a memory coupled to the at least one processor, the at least one processor being configured to:
receive a multicast data packet from a first terminal, wherein the multicast data packet comprises service data and an identifier of a first multicast group; determine an identifier of a second terminal based on the identifier of the first multicast group and a correspondence between the identifier of the first multicast group and the identifier of the second terminal; and send the service data to the second terminal based on the identifier of the second terminal.

14 . The apparatus according to claim 13 , wherein the identifier of the first multicast group is an internet protocol, IP address of the first multicast group, and the identifier of the second terminal is an IP address of the second terminal.

15 . The apparatus according to claim 14 , wherein the sending the service data to the second terminal based on the identifier of the second terminal comprises:
changing a destination IP address of the multicast data packet to the IP address of the second terminal, to obtain a unicast packet, wherein the unicast packet comprises the service data; and sending the unicast packet to the second terminal based on the IP address of the second terminal.

16 . The apparatus according to claim 13 , wherein the identifier of the first multicast group is an IP address of the first multicast group, and the identifier of the second terminal is a general packet radio service tunneling protocol, GTP tunnel address of the second terminal; and
the sending the service data to the second terminal comprises: sending the multicast data packet to the second terminal based on the GTP tunnel address of the second terminal.

17 . The apparatus according to claim 13 , wherein the wireless communications apparatus is a central unit, CU.

18 . The apparatus according to claim 13 , wherein the at least one processor being further configured to:
receive a multicast joining packet from the second terminal, wherein the multicast joining packet comprises the identifier of the first multicast group and the identifier of the second terminal; and add based on the identifier of the first multicast group and the identifier of the second terminal, the correspondence between the identifier of the first multicast group and the identifier of the second terminal.

19 . The apparatus according to claim 13 , wherein the at least one processor being further configured to:
receive a multicast leaving packet from the second terminal, wherein the multicast leaving packet comprises the identifier of the first multicast group and the identifier of the second terminal; and d

Assignees

• Huawei Tech Co Ltd

Inventors

• Luo Jing

Classifications

• H04W8/26 Primary

  Network addressing or numbering for mobility support · CPC title

• H04W4/06 Primary

  Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services · CPC title

• H04W76/12

  Setup of transport tunnels · CPC title

• H04W76/11

  Allocation or use of connection identifiers · CPC title