Impacts of refresh interval parameters on M-OLSR performance for Wireless Mesh Networks

Abstract

Modified Optimized Link State Routing (M-OLSR) has been developed for adaptability in Wireless Mesh Networking (WMNs) scenarios and exhibits a much better scalability of traffic load and mobility in sparse and dense network. The protocol uses some refresh timers for periodic updates of link information and for subsequent topology maintenance. In this paper, we investigate the impact of configuring refresh timer interval on protocol's performance under various networking scenarios. Simulation results demonstrate that, HELLO message timer interval has bigger impact than Topology control (TC) message timer on M-OLSR performance. And, as the network mobility increases, the impact of configuring refresh timer interval has greater effect than a relatively stable network.

E-AODV for Wireless Mesh Networks and Its Performance Evaluation

“…But when there is a link or node failure, or a new node join the network, the protocol takes some time to view the changes and re-establish a consistent view of the new topology. The entire process depends on the value set to refresh timer intervals [17]. The increased timer interval may create inconsistency in routing tables, resulting in a path loss and may lead to network congestion.…”

“…The increased timer interval may create inconsistency in routing tables, resulting in a path loss and may lead to network congestion. During such a transient period, the data traffic forwarded along a routing path with a failed link/node will be lost/dropped, causing throughput and PDR to degrade.Whereas a frequent refresh interval increases the control overhead which degrades network performance [17].…”