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An Enhanced Distributed Call Admission Control for Wireless Systems

Authors Jiang, S.M.
Tsang, D.H.K.
Li, B.
Issue Date 1998
Source Proceedings of IEEE Symposium on Computers and Communications (ISCC 98), Athens, Greece, July 1998, p. 695-699
Summary Call admission control (CAC) is one of the key elements to provide quality of service (QoS) guarantee in wireless mobile networks. A good CAC scheme should efficiently support handoffs and maintain a high utilization of the scarce radio resource while it should also be simple for implementation without loss of applicability. Since the traditional guard channel policy is not optimal for a hard constrained handoff dropping probability, there are some new proposals in the literature. Among them, the distributed call admission control seems to be simpler and more efficient with regards to the above requirements. However, there are some problems in original scheme which make the implementation complex and lead to performance degradation. In this paper, we will first discuss simplifications to the original scheme, and then further enhance the modified scheme by considering the difference of mobility support requirement between high and low mobility users. The simulation results shows that the enhanced scheme gives better performances.
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Language English
Format Conference paper
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