US 12,335,837 B2
Data transmission method, communication device, and chip
Haitao Li, Dongguan (CN); and Cong Shi, Dongguan (CN)
Assigned to GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., LTD., Dongguan (CN)
Filed by GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., LTD., Dongguan (CN)
Filed on Sep. 23, 2022, as Appl. No. 17/951,803.
Application 17/951,803 is a continuation of application No. PCT/CN2020/080835, filed on Mar. 24, 2020.
Prior Publication US 2023/0014211 A1, Jan. 19, 2023
Int. Cl. H04W 40/02 (2009.01); H04W 48/20 (2009.01); H04W 76/27 (2018.01)
CPC H04W 40/02 (2013.01) [H04W 48/20 (2013.01); H04W 76/27 (2018.02)] 7 Claims
OG exemplary drawing
 
1. A data transmission method, comprising:
receiving, by a target base station, a Radio Resource Control (RRC) resume request message and first data that are transmitted by a terminal device;
transmitting, by the target base station, a retrieve terminal context request message to an anchor base station, wherein the retrieve terminal context request message carries the first data or first indication information indicating transmission of the first data; and
receiving, by the target base station, a reply message transmitted by the anchor base station, wherein the reply message carries second indication information, the second indication information indicating the anchor base station is capable of transmitting the first data to a core network or the second indication information indicating the anchor base station is incapable of transmitting the first data to the core network,
wherein the first data is transmitted to the core network by the anchor base station in response to the second indication information indicating that the anchor base station is capable of transmitting the first data to the core network; or wherein the first data is transmitted to the core network by the target base station in response to the second indication information indicating that the anchor base station is incapable of transmitting the first data to the core network,
wherein the reply message is a retrieve terminal context response message in response to the anchor base station determining to transfer a terminal context,
wherein the method further comprises, in response to the second indication information indicating that the anchor base station is incapable of transmitting the first data to the core network;
transmitting, by the target base station, a path switch request message to the core network, and receiving, by the target base station, a path switch response message transmitted by the core network;
transmitting, by the target base station, the first data to the core network; and
transmitting, by the target base station, a release terminal context message to the anchor base station and an RRC release message to the terminal device.