A METHOD OF OPERATING A RADIO COMMUNICATIONS SYSTEM

摘要

A communications system, such as DECT, comprises a plurality of geographically separate primary (or fixed) stations (PS) and a plurality of secondary (or portable) stations (SS) which are able to roam relative to the primary stations. Communication between the primary and secondary stations is by way of any one of a plurality of TDD radio channels. A primary station when idle transmits an idle beacon signal onto which an idle primary station can lock by scanning the radio channels. However a secondary station which has roamed out of coverage range of the primary stations can save battery power by progressively increasing to a maximum time value the time interval between successive scans.