Design and performance evaluation of connection routing schemes for wireless ATM environment

We present two connection rerouting schemes, termed RAC (rearrange ATM connection) and EAC (extend ATM connection) for wireless ATM networks. These schemes can be used in isolation or in conjunction to support connection management in infrastructure-based wireless ATM networks, where the base stations are connected to ATM switches. The choice of using one or both schemes could be based on the desired level of bandwidth utilization, level of implementation complexity, and the acceptable level of connection processing load. The EAC includes detection and removal of any possible triangular or circular route that may be caused due to connection extension. To quantify the performance gain that can be achieved by removing and/or avoiding triangular and circular routes, we have developed a simulation model and some results are presented. These results show that significant savings in wireless bandwidth can be achieved by incorporating removal of inefficient routes in connection extension schemes.