Resource location in mobile ATM networks

This paper discusses the location management of mobile resources in ATM networks, with a focus on mobile switches and mobile networks. Two location management schemes are presented. The first one uses location registers to maintain a mapping between permanent addresses of mobile devices and assigned visitor addresses. The effect of mobility is isolated from standard routing, and a two-step routing approach is used to establish a call to a mobile device, leading to a suboptimal routing of connections. The second scheme is a mobility extension of the PNNI routing protocol. It allows mobile switches to change their membership dynamically to peer groups as they change access points. This approach is generalized to mobile logical group nodes, and allows mobile networks to be integrated in the PNNI hierarchy of a fixed network, allowing the optimal routing of connections. Both location management schemes are discussed and compared.