Call admission control scheme with GoS guarantee for wireless IP-based networks

This paper focuses on call admission control (CAC) algorithms in the regional registration networks. We propose a novel CAC scheme to take into account two layers: gateway foreign agent (GFA) and regional foreign agent (RFA). The key behind this idea is a threshold that is set to admit a new call in GFA, cooperating with a dynamic channel allocation algorithm in RFA. Explicit advantages of this scheme are not only reduced congestion in the hierarchical network structure, but also guaranteed grade of service (GoS) in terms of handoff call dropping probability. Simulations are conducted to validate level of target handoff call dropping probability. In practical aspect, the simplification of implementation is achieved by the proposed scheme.