Reliable Transmission with Multipath and Redundancy for Wireless Mesh Networks

摘要

Wireless Mesh Networks (WMNs) is considered as a key technology to solve the last mile problem. However due to the nature weakness of wireless channels, the packet transmission in WMNs is not that reliable. In this paper we proposed a new packets transmission scheme which is called - Reliable Transmission with Redundancy and Multipath (RTRM). RTRM uses ETT as its routing metric which not only consider the Packets Delivery Ratio (PDR) but also consider bandwidth. In RTRM we use scalar redundancy strategies and will choose a proper redundancy strategy depends on the minimum ETT of all paths. What's more, how to send redundant packets will be considered. We compared four different strategies to send redundant packets and add the best one into RTRM. By using RTRM the WMNs will have more capacity of fault-tolerance and can offer reliable Quality of Service (QoS) guarantee.