An Advanced Cache Retransmission Mechanism for Wireless Mesh Network

Wireless Mesh networks (WMN) are widely used in scenarios such as emergency communications, military self-organizing networks, and urban network access based on the capabilities of self-organization, self-configuration, and mesh multi-hop. Nowadays, various areas have increasingly requirements of mobility support, low latency, and quick response for WMN. However, the performance of traditional WMN is affected by frequent interruption and switch when the WMN nodes are moving. Re-establishing the connection will lead to additional time costs, which greatly increases network delay and instability. In addition, the receiving end sends retransmission requests because of packet loss and receive responses via long-distance multi-hop transmission, which leads to obvious relays and uncertainty. As a result, the utilization rate of network resources is dramatically reduced, and this kind of network is unable to cover the needs of dynamic or long-distance scene such as battlefields and emergency communications. Therefore, we innovatively propose a mechanism named Advanced Cache Retransmission Mechanism (ACRM) in this paper. ACRM includes the Cache Retransmission Mechanism (CRM) and the Trend-Jacobson (TJ) algorithm. Besides, the unique message format, interaction logic and relay node caching are used to enhance the WMN system based on UDP protocol transmission. The simulation shows that ACRM can improve the transmission efficiency and stability of WMN networks in dynamic or long-distance multi-hop Scenes.