Patent ID: 9602997
Date: 2017-03-21
CPC Classifications: H04W

Claim:
1. A method of device-to-device (D2D) communication in a wireless communication network in accordance with a Long Term Evolution (LTE) standard, the method comprising: receiving, by a first device from the network, an allocation of a D2D identifier (ID) for D2D discovery operation during a registration procedure: entering, by the first device, a Radio Resource Control Idle (RRC-Idle) state or a Radio Resource Control Connected (RRC-Connected) state, in a cell of the network in which the first device is located; transmitting, by the first device in the RRC-Idle state or RRC-Connected state, on a first set of discovery resources, a first D2D discovery signal for reception by a second device in the RRC-Idle state in the network; and receiving, by the first device in the RRC-Idle state or RRC-Connected state, on a second set of discovery resources, a second D2D discovery signal transmitted by a third device in the RRC-Idle state in the network; wherein discovery signal transmission resources, comprising the first and second sets of discovery resources, are allocated on a non-device-specific basis, and wherein the first device transmitting the first D2D discovery signal comprises the first device transmitting the first D2D discover signal without requesting authorization from an enhanced node B (eNB) of the cell in which the first device is located.