Schemes for mobility management of wireless ATM networks

Abstract

The growing fields of wireless networks and asynchronous transfer mode (ATM) are merging to form wireless ATM networks. This paper addresses dynamic bandwidth allocation, connection admission procedures, routing, and location management strategies in wireless ATM. More precisely, we investigate the issue of extending the private Network to Network Interface, PNNI, and protocols to support mobility. PNNI-based hierarchical routing, hand-off, location management and routing schemes are proposed to integrate wireless capabilities into ATM networks. These schemes provide fast and efficient hand-off connection processing mechanism and a reduction in the connection disruption time during a connection hand-off session. They also provide a predictable resource requirement of the mobile system during its connection. During a connection hand-off, misrouted cells can be re-routed to their destinations. This substantially reduces the overhead due to end-to-end re-transmissions invoked at higher layers. An analytical model is developed to illustrate the hand-off algorithm. Copyright © 1999 John Wiley & Sons, Ltd.