Patent ID: 9445446
Filing Date: 2016-09-13
CPC Classification: H04W

Claim Text:
1. A device to device (D2D) communication method, adapted for a caller user equipment (UE), and the method comprising: transmitting to a first device a Msg1 comprising a request for a direct communication with the first device, wherein the Msg1 is a random access preamble; receiving from the first device a Msg2 comprising a first decision to either accept or reject the request for the direct communication with the first device, wherein the Msg2 is a random access response; transmitting to a second device a Msg3 comprising the request for the direct communication with the first device when the first decision is to accept, wherein the Msg3 is a radio resource control (RRC) Connection Request; receiving from the second device a Msg4 comprising a second decision to either accept or reject the direction communication between the caller UE and the first device; and establishing the direct communication with the first device when the request is accepted by the second device, wherein the step of receiving from the first device the Msg2 comprising the first decision to either accept or reject the request for the direct communication with the first device further comprises: