Patent ID: 9226226
Filing Date: 2015-12-29
Classification: H04W

Abstract:
1. A method of performing a discovery procedure for a Proximity-Based Service (ProSe) by a User Equipment (UE) in a cellular communication system, the method comprising: receiving first resource allocation information for plural ProSe channels from a base station via a broadcast signal; sensing one of the plural ProSe channels, the one of the plural ProSe channels being identified using least significant bits of a ProSe service identity (ID); transmitting a sensing result for one of the plural ProSe channels to the base station, when the one of the plural ProSe channels is detected as being idle and if the UE is within a coverage of the cellular network system; and transmitting a discovery signal via the one of the plural ProSe information channels to another UE, when the one of the plural ProSe channels is detected as being idle and if the UE is out of the coverage of the cellular network system.