A Self-adaptive Packet Scheduling Algorithm for Hybrid-traffic in Heterogeneous Wireless Networks

In heterogeneous wireless network environment (HWNE), multi-mode terminals through access control and handoff technology, are always in the optimal network. However, when the users set, while a competition optimal network bandwidth limited, easily lead to network congestion and quality of service (QoS) decrease. To solve this problem, this paper configures QoS policies for heterogeneous network system agents, with the change of network resources dynamically adjusts traffic scheduling strategy. The main contribution of this paper is that a novel self-adaptive packet scheduling algorithm PFM-LWDF is proposed, which improve the complex scheduling hierarchical structure in the existing research work [1-3] with a hybrid service QoS guarantee. Based on maximum weighted priority delay correction algorithm, the algorithm considers throughput, delay and packet loss rate, and respectively assigns weighting factor. Simulation results show that the proposed algorithm is superior to the existing schedule algorithms in terms of throughput, delay and packet loss rate.