The Call Control Scheme for Non-uniform Traffic Distribution in Multiple Cell Model

In this paper, we propose the call control scheme which can improve the capacity of the whole system for the non-uniform traffic load distribution and the multiple types of services in multiple cell CDMA environments. In CDMA system, the number of mobile stations which can be served simultaneously in a base station is limited by the amount of total interference received. Further, the average number of mobile stations in each cell may not be uniformly distributed. Considering the facts, the call admission control method using the effective bandwidth concept is employed in this paper. The bandwidth for a new call is allocated by considering the number of mobile station being served and dynamically assigned by taking account of the blocking rate of new calls and the dropping rate of handoff calls. The call control procedure is experimented through a simulation study by dynamically assigning the bandwidth to new and handoff calls. The results show our proposed call control scheme can accommodate more mobile stations than the one of method.