Distributed call processing for wireless mobile networks

This paper presents the design and implementation of call processing and mobility management software created for wireless networks using an asynchronous transfer mode (ATM) backbone. It describes the motivation for the work, reviews the system design and research results, and discusses the implementation of the system. It also presents ongoing work that incorporates the lessons learned from the implementation into a system that complies with major telecommunications standards. The system uses commercially available hardware and networking software to reduce cost, and a modular and distributed design to facilitate a scaleable system. Among its other benefits are its ability to reduce call establishment time and to lower signaling loads.