RSIP: Relay Selection and Interruption Processing Scheme to Enhance QoS of WBSN

Reliable transmission and long lifetime are our main goals for wireless body sensor networks (WBSNs). Due to the mobility of the human body, the network topology often changes, and the problem of node connection interruption is inevitable. To solve the problem, the Relay Selection and Interruption Processing (RSIP) scheme is proposed in this paper. It established a function of the residual energy and the historical transmission success rate of each node to select the relay node forwarding data to implement dynamic routing transmission. Also, an interrupt processing algorithm in RSIP is used to deal with the connection interruption problem storing data, delaying forwarding data, dropping data when timeout, and finding more reliable relay nodes. The simulation results show that the RSIP scheme extends the lifetime by approximately 12.4%, 20.8%, and 35.5% compared with the CLDO scheme, the JRP scheme, and the EERP scheme respectively, as well as it has higher throughput rate than these three schemes under non-bad situations.