Efficient Backup Link Scheme of ECHO Protocol for Mobile Ad Hoc Networks

Ad hoc wireless mesh network is widely used in emergency rescue, military battlefield and smart city due to its flexible networking and easy to deployment. However, traditional routing protocols have the problem of high packet loss rate in the case of poor link quality. To address this issue, this paper proposes an optimization router scheme considering the "backup path" - ECHOBL protocol. In the proposed protocol, we set the critical nodes according to the signal-to-noise ratio(SNR) conditions of the link to improve the communication reliability. Moreover, we introduce the networking mode and optimization point. Finally, we prove correctness and integrity of the proposed protocol. Field experimental results show that, compared with ECHO protocol and Flooding protocol, ECHOBL protocol has lower packet loss rate and better performance under various packet frequencies.