Optimization for Reducing Handoff Latency and Utilization of Bandwidth in ATM Networks

To support mobility in ATM networks, a number of technical challenges need to be resolved. The impact of handoff schemes in terms of service disruption, handoff latency, cost implications and excess resources required during handoffs needs to be addressed. In this paper, a one phase handoff and route optimization solution using reserved PVCs between adjacent ATM switches to reroute connections during inter-switch handoff is studied. In the second phase, a distributed optimization process is initiated to optimally reroute handoff connections. The main objective is to find the optimal operating point at which to perform optimization subject to cost constraint with the purpose of reducing blocking probability of inter-switch handoff calls for delay tolerant traffic. We examine the relation between the required bandwidth resources and optimization rate. Also we calculate and study the handoff blocking probability due to lack of bandwidth for resources reserved to facilitate the rapid rerouting. Keywords—Wireless ATM, Mobility, Latency, Optimization rate and Blocking Probability.

[1]  Dan Keun Sung,et al.  A new fast handoff management scheme in ATM-based wireless mobile networks , 1996, Proceedings of GLOBECOM'96. 1996 IEEE Global Telecommunications Conference.

[2]  Vincent W. S. Wong,et al.  A framework for analyzing path optimization schemes for inter-switch handoff in wireless ATM networks , 1999, 1999 IEEE International Conference on Communications (Cat. No. 99CH36311).

[3]  SuKyoung Lee,et al.  High-speed PVC-based handover control in wireless ATM networks , 2001, Comput. Commun..

[4]  Neco Ventura,et al.  An adaptive Route Optimization for Inter-Cluster Hand Scheme in Wireless ATM Networks , 2002 .

[5]  Donald C. Cox,et al.  Rerouting for handoff in a wireless ATM network , 1996, Proceedings of ICUPC - 5th International Conference on Universal Personal Communications.

[6]  Eryk Dutkiewicz,et al.  Handover re-routing schemes for connection oriented services in mobile ATM networks , 1998, Proceedings. IEEE INFOCOM '98, the Conference on Computer Communications. Seventeenth Annual Joint Conference of the IEEE Computer and Communications Societies. Gateway to the 21st Century (Cat. No.98.