S. Suzuki et al., PHS ROAMING SIGNALING PROTOCOL ARCHITECTURE TOWARD GLOBAL MOBILITY NETWORK, IEEE journal on selected areas in communications, 15(8), 1997, pp. 1597-1607
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).