US 12,088,513 B2
Method and apparatus for retransmitting packets in dual connectivity network
Taeseop Lee, Suwon-si (KR); Taejeoung Kim, Suwon-si (KR); and Minsuk Choi, Suwon-si (KR)
Assigned to Samsung Electronics Co., Ltd., Suwon-si (KR)
Appl. No. 17/417,648
Filed by Samsung Electronics Co., Ltd., Suwon-si (KR)
PCT Filed Dec. 17, 2020, PCT No. PCT/KR2020/018571
§ 371(c)(1), (2) Date Jun. 23, 2021,
PCT Pub. No. WO2021/251573, PCT Pub. Date Dec. 16, 2021.
Claims priority of application No. 10-2020-0069851 (KR), filed on Jun. 9, 2020.
Prior Publication US 2022/0337346 A1, Oct. 20, 2022
Int. Cl. H04W 28/04 (2009.01); H04L 1/1812 (2023.01); H04L 1/1829 (2023.01); H04L 1/1867 (2023.01); H04L 5/00 (2006.01)
CPC H04L 5/0001 (2013.01) [H04L 1/1812 (2013.01); H04L 1/1851 (2013.01); H04L 1/1887 (2013.01); H04L 1/189 (2013.01); H04W 28/04 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A data transmission method performed by a node in dual connectivity (DC), the method comprising:
obtaining, from a core network (CN), at least one packet for transmitting to a user equipment (UE) via a first node or a second node;
determining a first packet to be transmitted via the first node, among the at least one packet;
obtaining first packet delivery state information corresponding to the first node generated at a radio link control (RLC) layer of the first node, wherein the first packet delivery state information indicates the first packet is not received at the UE;
obtaining second packet delivery state information corresponding to the second node generated at an RLC layer of the second node;
predicting expiration of a timer of the UE related to packet delay based on the first packet delivery state information and the second packet delivery state information; and
in response to the expiration of the timer being predicted, determining whether to retransmit the first packet to the UE via the second node,
wherein the node is the first node or the second node.