US 9,813,842 B2
Methods, apparatuses and systems directed to proximity services (ProSe) direct discovery
Saad Ahmad, Montreal (CA); Amir Helmy, Vancouver (CA); Guanzhou Wang, Brossard (CA); Loic Canonne-Velasquez, Verdun (CA); Ulises Olvera-Hernandez, Montreal (CA); and Mahmoud Watfa, Saint Leonard (CA)
Assigned to InterDigital Patent Holdings, Inc., Wilmington, DE (US)
Filed by InterDigital Patent Holdings, Inc., Wilmington, DE (US)
Filed on Apr. 6, 2016, as Appl. No. 15/92,559.
Claims priority of provisional application 62/143,681, filed on Apr. 6, 2015.
Claims priority of provisional application 62/162,437, filed on May 15, 2015.
Prior Publication US 2016/0295347 A1, Oct. 6, 2016
Int. Cl. H04B 7/00 (2006.01); H04W 4/00 (2009.01); H04W 8/00 (2009.01)
CPC H04W 4/005 (2013.01) [H04W 8/005 (2013.01)] 36 Claims
OG exemplary drawing
 
1. A method implemented in a first proximity services (ProSe) function serving a discoverer user equipment (UE), the method comprising:
receiving, from the discoverer UE, a first discovery request message including a ProSe application identifier and an indication indicating Model B discovery;
transmitting, to a second ProSe function configured to serve a discoveree UE, a second discovery request message requesting a ProSe application code corresponding to the ProSe application identifier;
determining that no valid ProSe application code corresponding to the ProSe application identifier is available based on any of:
not receiving a response to the second discovery request message;
not receiving any valid ProSe application code corresponding to the ProSe application identifier in response to the second discovery request message; and
receiving, in response to the second discovery request message, an indication indicating that no valid ProSe application code corresponding to the ProSe application identifier is available; and
transmitting, to the discoverer UE, a reject-type discovery response message.