3G Handset and Network Design

CHAPTER 12

GSM-MAP/ANSI 41 Integration

We have just discussed some of the radio system planning parameters of IMT2000DS—how to deliver adaptive radio bandwidth and how to deliver consistent-quality bandwidth, with sufficient resilience to support persistent rich media sessions between duplex users. We described how radio bandwidth quality is one necessary and important component in the delivery of end-to-end performance guarantees. These guarantees form part of a user's service level agreement, which includes admission rights and policy rights stored in the SIM/USIM.

Approaching a Unified Standard

In a GSM-MAP network, it is the SIM/USIM that dictates or at least describes the quality of service requirements of the user or the user's application. This in turn determines the allocation of radio and network resources. Radio resources are provided either over an IMT2000DS air interface (with backward compatibility to GSM, GPRS and E-GPRS air interfaces) or a CDMA2000 air interface (with backward compatibility to IS95A, B, C).

In addition to having two similar but different air interfaces, we have, worldwide, two similar but different mobility network standards:

ANSI 41 network. Any U.S. TDMA or CDMA2000 air interface, or any AMPS air interface, either in the United States or Asia, will have behind it an ANSI 41 network.

GSM-MAP network. Any GSM or IMT2000DS air interface, either in the United States, Europe, or Asia, will have behind it a GSM-MAP network.

The differences between the ...