New CX searching algorithm for handoff control in wireless ATM networks

The Crossover Switch (CX) plays an important role in ensuring fast and seamless handoff in Wireless ATM Networks(WANs). Networks are managed via one of the following two methods; the centralized connection management where a connection server performs network connection management, and the distributed connection management where each node performs network connection management. The two methods have their own drawbacks. Where connection management is performed in a centralized manner, propagation delay occurs. Distributed connection management leads to increased overall system overhead. For reducing those problems, we propose a Distributed Anchor CX Searching algorithm. Within networks that are grouped together, connection management is done for each group by anchor switches, and Permanent Virtual Circuit (PVC) with a narrow bandwidth is assigned between anchors for exchange of information. The proposed algorithm enables quick searching of a targeted CX, makes management of the overall network easier, and reduces system overhead.