A Call Admission Control(CAC) scheme based on load balance is proposed to avoid the congestion due to the asymmetry of service resource requirements. Traffic is classified in this scheme. According to system’s different uplink load and downlink load situation, different method is adopted to reduce load imbalance distance of system. The aim to load balance is achieved. Numerical results demonstrate that the scheme can reduce blocking rate well and improve performance of system efficiently.
heterogeneous wireless networks,
Call Admission Control(CAC),