US 12,309,266 B2
Method of performing device to device communication between user equipments
Anil Agiwal, Bangalore (IN); Rajavelsamy Rajadurai, Bangalore (IN); and Young-Bin Chang, Anyang-si (KR)
Assigned to Samsung Electronics Co., Ltd., Suwon-si (KR)
Filed by Samsung Electronics Co., Ltd., Suwon-si (KR)
Filed on Jan. 29, 2024, as Appl. No. 18/425,684.
Application 18/425,684 is a continuation of application No. 17/194,633, filed on Mar. 8, 2021, granted, now 11,888,979, issued on Jan. 30, 2024.
Application 17/194,633 is a continuation of application No. 16/709,076, filed on Dec. 10, 2019, granted, now 10,958,429, issued on Mar. 23, 2021.
Application 16/709,076 is a continuation of application No. 16/021,626, filed on Jun. 28, 2018, granted, now 10,505,725, issued on Dec. 10, 2019.
Application 16/021,626 is a continuation of application No. 14/928,184, filed on Oct. 30, 2015, granted, now 10,063,371, issued on Aug. 28, 2018.
Claims priority of application No. 5430/CHE/2014 (IN), filed on Oct. 30, 2014; and application No. 5430/CHE/ 2014 (IN), filed on Oct. 7, 2015.
Prior Publication US 2024/0171383 A1, May 23, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. H04L 9/08 (2006.01); H04L 9/40 (2022.01); H04L 69/22 (2022.01); H04W 12/02 (2009.01); H04W 12/033 (2021.01); H04W 12/04 (2021.01)
CPC H04L 9/0861 (2013.01) [H04L 9/0833 (2013.01); H04L 63/205 (2013.01); H04W 12/02 (2013.01); H04W 12/033 (2021.01); H04L 63/162 (2013.01); H04L 69/22 (2013.01); H04L 2209/80 (2013.01); H04W 12/04 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A method of transmitting data in a device to device communication system, the method comprising:
determining whether a security feature is applied to a packet data convergence protocol (PDCP) service data unit (SDU); and
transmitting a PDCP protocol data unit (PDU) based on the determination to a receiving user equipment (UE),
wherein a PDCP header of the PDCP PDU includes a PDCP sequence number (SN) and a first key identification (ID),
wherein, in case that the security feature is applied to the PDCP SDU, the first key ID is set to a value for identifying a first key, the first key being used to generate an encryption key for securing the PDCP SDU, and
wherein, in case that the security feature is not applied to the PDCP SDU, the first key ID is set to a zero value.