摘要： 针对传统异构无线网络硬负载均衡方法业务阻塞率较高的问题，根据软负载均衡方法，提出了异构无线网络中基于IP流分流的负载均衡算法. 该算法通过数值分析得到最佳分流比率，在用户请求网络接入或切换时，根据最佳分流比率将用户业务分成子流，并把各子流接入或切换到相应网络，保证了网络间的负载均衡. 仿真结果表明，所提算法相对于传统的硬负载均衡方法，降低了业务阻塞率和业务丢包率.

Abstract: As the traffic blocking probability of traditional hard load balancing methods is generally high over heterogeneous wireless networks, we propose a load balancing algorithm based on dividing the IP flow (LBD) over heterogeneous wireless networks based on the idea of soft load balancing. Through numerical analysis, we obtain the optimal flow-dividing ratio to determine the volume of traffic delivered to each network, which
maintains network load balance. Simulation results show that the proposed method outperforms traditional hard load balancing techniques in terms of traffic blocking and packet loss probabilities.