METHOD AND APPARATUS FOR ADAPTING NON-CELLULAR PRIVATE RADIO SYSTEMS TO BE COMPATIBLE WITH CELLULAR MOBILE PHONES

摘要

PURPOSE: An apparatus is provided for adapting non-cellular private radio systems to be compatible with cellular mobile phones, for communication through fixed telephone network. CONSTITUTION: The air interface of a private radio system (10) is adapted to be compatible with the air interface of a cellular mobile network (20). The private radio system's beacon channel (BCH) includes a dual-burst type of frequency correction channel (FCCH) and synchronization channel (SCH). The burst formats of these two channels (FB, SB) are defined according to the frequency correction channel and synchronization channel burst formats used in the cellular mobile network (20). An information message carried in the private synchronization channel (SCH) includes status and identity information related to the private radio system. An access request channel (ARCH) is defined for the private radio system, which enables a mobile terminal to request access to the private radio system. The protocol of the private radio system's access request channel (in the up link) is similar to the protocol of the cellular network's access grant channel (AGCH) used in the down link. Alternatively, the protocol of the cellular network's synchronization channel (SCH)in the down link can be used for the private radio system's access request channel (ARCH) (in the up link). Consequently, the mobile terminal (26) can be used as a private cordless phone