A Call Admission Control Scheme in CDMA Cellular System with Non-uniform Traffic Distribution
The paper proposes a call admission control(CAC) scheme for CDMA cellular systems with non-uniform traffic distribution among cells. The proposed CAC scheme reserves some portion of the system resource in the heavily loaded cells for upcoming calls occurring in neighbor cells. The proportion of reserved resource can be adaptively adjusted according to the call blocking state. Simulations results show that the scheme can resolve the inter-cell unbalanced traffic problem. Comparing with fixed resource reserved CAC, the call blocking rate of the proposed scheme is lower.