Quality of Service (QoS)-based Hybrid Optimization Algorithm for Routing Mechanism of Wireless Mesh Network

Abstract

A wireless mesh network (WMN) combines the advantages of the traditional wireless local access network (WLAN), such as low cost and easy deployment, with the multi-hop architecture of its wireless self-organizing network, and has significant advantages in adaptability and scalability. However, both the interference between wireless links and the fading of transmission signals can easily lead to the decline of link traffic, which will lead to major challenges in the data transmission process in the WMN. To solve this problem, a multipath routing algorithm is proposed to guarantee the quality of service (QoS). More specifically, data packets can be transmitted over multiple paths to improve overall network throughput performance. A multipath routing scheduling algorithm (MRSA) is also proposed in this paper. On the basis of the currently available bandwidth information and the delay information introduced by the path, data packets can be divided into multiple segments and sent through different paths before transmission. The proposed scheduling policies can be adjusted and optimized on the basis of path delays so that data can be transmitted more efficiently over different paths. Simulation experiments verify the high performance of the proposed routing mechanism and scheduling strategy in terms of the average packet queuing delay, average delay jitter, and loss rate under different network loads.