Communication system, communication unit and method of location determination

摘要

A communication system includes a plurality of serving communication units operably coupled to a controller and providing communication to a plurality of mobile communication units. At least one of the plurality of mobile communication units (402) transmits (410) a location request signal (410) on a dedicated location resource. At least one neighbouring serving communication unit (406, 408) is made aware of the location request signal (410) and utilises said dedicated location resource for monitoring transmissions from the at least one of the plurality of mobile communication units (402) to assist locating said unit. A communication unit, method for location determination and method of mitigating a near-far effect are provided. This enables a reduction in the amount of signalling and complexity required for the location determination process in a UMTS system. It is simple to implement and in a TDD mode the dedicated location channel is easy to monitor since TDD BTSs are synchronized. The process mitigates the effect of near-far interference and increases the measurement accuracy location in location determination processes. <IMAGE>