US 12,425,846 B2
Secure sidelink communication
Anantharaman Balasubramanian, San Diego, CA (US); Hong Cheng, Basking Ridge, NJ (US); Junyi Li, Fairless Hills, PA (US); Shuanshuan Wu, San Diego, CA (US); and Kapil Gulati, Belle Mead, NJ (US)
Assigned to Qualcomm Incorporated, San Diego, CA (US)
Filed by QUALCOMM Incorporated, San Diego, CA (US)
Filed on Oct. 29, 2021, as Appl. No. 17/452,974.
Prior Publication US 2023/0134088 A1, May 4, 2023
Int. Cl. H04W 12/033 (2021.01); H04W 12/041 (2021.01); H04W 12/0471 (2021.01); H04W 12/106 (2021.01)
CPC H04W 12/033 (2021.01) [H04W 12/041 (2021.01); H04W 12/0471 (2021.01); H04W 12/106 (2021.01)] 30 Claims
OG exemplary drawing
 
1. An apparatus for wireless communication at a user equipment (UE), comprising:
memory; and
at least one processor coupled to the memory and configured to:
receive, from a base station, a security mode command message associated with secure sidelink communication with at least one other UE, wherein the base station is different from the at least one other UE;
identify, based on the security mode command message, information of a radio resource control (RRC) encryption key and a user plane encryption key, the user plane encryption key being associated with a UE-Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access Network (UTRAN) (Uu) link different from a sidelink;
transmit, to the base station, a security mode complete message based on the user plane encryption key or the RRC encryption key;
receive, from the base station after the security mode complete message, an indication of a common base key and the RRC encryption key, wherein the indication comprises the common base key scrambled with the RRC encryption key;
identify a physical layer sidelink encryption key based on the indication and the common base key scrambled with the RRC encryption key, the physical layer sidelink encryption key being associated with the secure sidelink communication with the at least one other UE; and
communicate with the at least one other UE based on the physical layer sidelink encryption key.