US 12,225,409 B2 · Data transmission method and device

Abstract

For data transmission when a communication manner between the network device and a plurality of terminal devices is switched from a unicast manner to a multicast manner, a data transmission method includes: A network device sends first indication information to a first terminal device, where the first indication information includes a first sequence number (SN), and the first indication information is used to indicate the first terminal device to receive a data packet in a multicast manner. The network device sends the data packet to the first terminal device and a second terminal device in the multicast manner based on the first SN.

Claims16

Dependent claims

A data transmission method, comprising:

sending, by a network device, first indication information to a first terminal device, wherein the first indication information comprises a first sequence number (SN), wherein the first SN is determined based on a maximum sequence number SN2 of a data packet sent by the network device to a second terminal device in a unicast manner, and wherein the first indication information indicates that the first terminal device is to receive a data packet in a multicast manner;
and
sending, by the network device, the data packet to the first terminal device and the second terminal device in the multicast manner based on the first SN.

A data transmission method, comprising:

receiving, by a first terminal device, first indication information from a network device, wherein the first indication information comprises a first sequence number (SN), wherein the first SN is determined based on a maximum sequence number SN2 of a data packet sent by the network device to a second terminal device in a unicast manner, and wherein the first indication information indicates that the first terminal device is to receive a data packet in a multicast manner;
and
receiving, by the first terminal device, the data packet from the network device in the multicast manner based on the first SN.

A communication apparatus, comprising:

one or more processors;
and
a memory, wherein the memory stores processor-executable instructions:
wherein the one or more processors are configured to execute the processor-executable instructions to facilitate the following being performed by the communication apparatus:
sending first indication information to a first terminal device, wherein the first indication information comprises a first sequence number (SN), wherein the first SN is determined based on a maximum sequence number SN2 of a data packet sent by the communication apparatus to a second terminal device in a unicast manner, and wherein the first indication information indicates that the first terminal device is to receive a data packet in a multicast manner;
and
sending the data packet to the first terminal device and the second terminal device in the multicast manner based on the first SN.

4 more elements

A communication apparatus, comprising:

one or more processors;
and
a memory, wherein the memory stores processor-executable instructions:
wherein the one or more processors are configured to execute the processor-executable instructions to facilitate the following being performed by the communication apparatus:
receiving first indication information from a network device, wherein the first indication information comprises a first sequence number (SN), wherein the first SN is determined based on a maximum sequence number SN2 of a data packet sent by the network device to a second terminal device in a unicast manner, and wherein the first indication information indicates that the communication apparatus is to receive a data packet in a multicast manner;
and
receiving the data packet from the network device in the multicast manner based on the first SN.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application

17/677,636Filed 22 Feb 2022 · continuation

Priority

CN 201910778608.X22 Aug 2019

Published

US 2022/0174541 A12 Jun 2022

Granted

11 Feb 2025

Term ends

Not estimatedThe source records don’t support an estimate.

Classification7 codes

H04L 47/34
Flow control; Congestion control: ensuring sequence integrity, e.g. using sequence numbers
H04L 12/1881
For broadcast or conference , e.g. multicast: with schedule organisation, e.g. priority, sequence management
H04L 12/189
For broadcast or conference , e.g. multicast: in combination with wireless systems
H04W 4/06
Services specially adapted for wireless communication networks; Facilities therefor: selective distribution of broadcast services, e.g. multimedia…

Data transmission method and device

Life of this patent

Data transmission method and device

Life of this patent

Abstract

Claims16