Method and apparatus for improving resource control in a wireless communication system

A method for improving device to device (D2D) transmission in a wireless communication system, the method comprising:

• receiving, by a user equipment (UE), at least one resource pool for at least one contention-based D2D transmission by system information;
• receiving a signaling from a network node based on at least a sequence number associated with the at least one resource pool if the UE is monitoring the at least one resource pool;
• and
• decoding the at least one contention-based D2D transmission based on at least the signaling.

A communication device for improving resource control in a wireless communication system, the communication device comprising:

• a control circuit;
• a processor installed in the control circuit;
• and
• a memory installed in the control circuit and operatively coupled to the processor;
• wherein the processor is configured to execute a program code stored in the memory for improving resource control by:
• receiving a configuration including at least a first contention-based resource pool and a second contention-based resource pool, wherein the first contention-based resource pool includes resources for multiplexing Device-to-Device (D2D) transmission(s) and Downlink (DL) transmission(s) in power domain, and the second contention-based resource pool does not include the resources for multiplexing D2D transmission(s) and DL transmission(s) in power domain;
• receiving at least one threshold value related to a power;
• and
• selecting the first contention-based resource pool or the second contention-based resource pool for D2D transmission based on at least the threshold value.