Abstract

A distributed architecture for wireless PCS networks is appealing due to the separation of call and connection control and the use of operations which run in parallel that can result in reduced data management load, signaling load as well as reduced post-dial delay; the Distributed Architecture for Wireless PCS Networks (DAWN) we have recently developed is such an architecture. On the other hand, centralized architecture such as IS-41 has already been deployed in several wireless networks. Thus, due to imbedded base of conventional architecture such as the IS-41 architecture, the successful deployment of a distributed architecture such as DAWN is highly dependent on the ability to phase in the new architecture and, consequently, to provide seamless interworking capabilities so that a mobile user can move between any two areas where the architectures are different. In this paper, we address the interworking aspects of DAWN with IS-41 based networks. Various IS-41 call scenarios are presented to demonstrate the workings of the interworking function. Interworking with PSTN (public switched telephone network) and handling of intersystem handoffs is also discussed.

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