US 9,813,910 B2
Prevention of replay attack in long term evolution device-to-device discovery
Hong Cheng, Bridgewater, NJ (US); Sudhir Kumar Baghel, Bridgewater, NJ (US); and Adrian Edward Escott, Reading (GB)
Assigned to QUALCOMM Incorporated, San Diego, CA (US)
Filed by QUALCOMM Incorporated, San Diego, CA (US)
Filed on Jan. 29, 2015, as Appl. No. 14/609,003.
Claims priority of provisional application 61/955,601, filed on Mar. 19, 2014.
Prior Publication US 2015/0271675 A1, Sep. 24, 2015
Int. Cl. H04M 1/66 (2006.01); H04W 12/08 (2009.01); H04W 8/00 (2009.01); H04W 12/10 (2009.01); H04L 29/06 (2006.01); H04W 12/12 (2009.01); H04W 76/02 (2009.01)
CPC H04W 12/08 (2013.01) [H04L 63/12 (2013.01); H04W 8/005 (2013.01); H04W 12/10 (2013.01); H04L 63/0846 (2013.01); H04W 12/12 (2013.01); H04W 76/023 (2013.01)] 30 Claims
OG exemplary drawing
 
1. A method of wireless communication at a user equipment (UE), comprising:
receiving a first time parameter and a timing offset allowance from a network, the first time parameter being received while the UE is in a connected mode;
setting a timing variable based on the first time parameter;
communicating a device-to-device (D2D) discovery message, the D2D discovery message being associated with D2D discovery communication with a second UE, the D2D discovery message identifying a second time parameter associated with a discovery slot for the D2D discovery communication;
authenticating the D2D discovery message by comparing the second time parameter with the timing variable to determine whether a difference between the second time parameter and the timing variable is within the timing offset allowance; and
communicating with the second UE according to one or more parameters in the D2D discovery message.