POWER SAVING SYSTEMS FOR MOBILE RADIO COMMUNICATION

摘要

A mobile radio system having two or more power saving modes available to mobile stations, wherein the mode adopted by the stations is determined by the presence or absence of synchronisation signals on a channel in the system and by at least one time limit for occurrence of the synchronisation signals. The system may have three power saving modes in accord with a state of the channel determined by a signalling mobile station, by a beacon, or by the absence of a signalling station or a beacon. The system may have one or more time limits that define intervals for which mobiles must wait before commencing signalling and transmission of a synchronisation signal, for which a beacon must wait before commencing transmission of a synchronisation signal, and/or for which mobiles must wait before sleeping in the absence of a synchronisation signal.