Communicating on a direct mode channel

In method for is directly mode channel corresponding, a memory the first wireless unit and an apparatus and direct mould common channel at least one corresponding and attempt (201); the ventilation channel mode to the position corresponding to the anticipated the power the second wireless unit. To the method, the first wireless unit is for on the ventilation channel mode, comprising a power sending information of wherein transmission concerns using, wherein the transmission the second wireless monitoring unit (202) directly mode channel, and receiving the first wireless transmission unit, and a comprises a first wireless unit the related the power (207) information storage the transmission (411) on the memory, and wireless unit quality and power information to the first wireless unit and a planned with the power for the signal compares (209), and is inferred (210) is a comparison result of the starting by aThe mode channel and transmission.