NXG04-5: Fair Call Admission Control for Prioritizing Vertical Handoff in Multi-Traffic B3G Networks

In this paper, we propose a fair call admission control (CAC) algorithm that prioritizes vertical handoffs in a multi-traffic and hierarchical Beyond Third Generation (B3G) network. Fairness is governed by the combined call blocking probability (includes both new and handoff calls) for both fixed capacity (e.g. 2G) and soft-capacity (e.g. 3G, WLAN etc.) networks. Average traffic profiles are considered to formulate an approximate admission solution. In fixed capacity networks handoff is prioritized by optimizing the number of reserved channels in accordance to the varying traffic profile while in soft- capacity networks prioritization is achieved by optimizing the priority ratio of new and handoff calls. Because of its simplicity, the proposed algorithm can easily coexist with traditional CAC algorithms supporting horizontal handoffs, thus preserving the individual networks within the B3G framework.