| 摘要 |
A wireless direct mode communication unit (200) comprises a transceiver; and a signal processor (208), operably coupled to the transceiver (209), for controlling the transmission and reception of wireless signals. The signal processor (208) initiates a transmission of an interrogation message to one or more other direct mode communication units to identify a proximity of the wireless direct mode communication unit (200) to the one or more other direct mode communication units. A method of identifying a contactability/proximity of a distal wireless direct mode communication unit is also provided. <??>In this manner, it is now possible to identify a proximity of distal wireless communication unit in a DMO system dynamically and relatively easily. Furthermore, the principles can serve as a model to regulate and manage unsynchronised, itinerant communication systems. <IMAGE> |
