PHS ROAMING SIGNALING PROTOCOL ARCHITECTURE TOWARD GLOBAL MOBILITY NETWORK

The network for supporting the global personal communication is called the global mobility network (GLOMONET), where global mobility is guar anteed by coordination between intelligent networks (IN's), This paper describes briefly the implementation of a roaming signaling protocol for the personal handy-phone system (PHS) GLOMONET, clarifying the con cepts of PHS architecture regarding the GLOMONET, PHS is a more econom ical personal communication system than existing cellular systems, by introducing the concept that PHS service is provided by the most effec tive use of the existing ISDN and IN functions, where the majority of network functions to provide ISDN services are commonly used for funct ions for PHS service provision. And the PHS mobility function realized by IN guarantees flexible and effective roaming service provision for the globalization of future personal communication, The proposed PHS signaling protocol architecture is based on capabilities of intelligen t network capability set 2 (IN CS2) defined by International Telecommu nication Union-Telecommunication Standardization Sector (ITU-T) Study Group 11 and a visitor location register (VLR) database scheme with ef ficient signal transfer in the GLOMONET, The PHS specific roaming sign aling protocol is defined by the service-independent IN application pr otocol (INAP). The proposed PHS concepts and roaming signaling protoco l were reflected to the national telecommunications standards in the T elecommunication Technical Committee (TTC) and standards in the PHS-me morandum of understanding (MoU).