Patent ID: 7831252

Claim:
A method to be performed by a UE (user equipment), comprising: detecting downlink signals of an active cell in which said UE is camping and adjacent cells to said active cell; judging whether there exists a suitable cell whose link performance is a predefined value higher than that of said active cell for both said UE and an another UE, according to said detecting result; sending a detection report message to a network system to start a judging procedure of said network system if there exists said suitable cell, and said judging procedure deciding whether said UE and said another UE in P2P (peer to peer) communication can handover into said suitable cell to continue communication in P2P communication mode, wherein said detection report message comprises a first predefined threshold relating to a lower limit value at which a link satisfies a quality of service requirement and a second threshold relating to a condition in which an adjacent cell is used as a candidate cell, and wherein said UE and said another UE each transmits a candidate cell set comprising at least one candidate cell to said network system and said network system determines if a common candidate cell exists in said candidate cell sets, and upon detection of said common candidate cell, said network system instructs said UE and said another UE to perform a handover.