US 11,888,979 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 Mar. 8, 2021, as Appl. No. 17/194,633.
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 2021/0194684 A1, Jun. 24, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. H04L 29/06 (2006.01); H04L 9/08 (2006.01); H04W 12/033 (2021.01); H04W 12/02 (2009.01); H04L 9/40 (2022.01); H04W 12/04 (2021.01); H04L 69/22 (2022.01)
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)] 17 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);
configuring a PDCP protocol data unit (PDU) based on the determination; and
transmitting the PDCP PDU to a receiving user equipment (UE),
wherein a PDCP header of the PDCP PDU includes an SDU type, 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 being generated based on a second key identified by a second key ID, 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.