Experimental evaluation on impacts of timers on diverse movement patterns for mobile ad HOC networks

Abstract

Background/Objectives: Due to mobility nature of nodes in mobile ad hoc networks, topology changes are observed frequently, that it affects the performance metric of the routing protocol. Therefore, designing a mechanism for fast reactivity to these network changes could improve the performance of mobile networks. Methods/Statistical analysis: Several factors like, local link connectivity, local link failure and the rate at which topology changes are highly impacted by the mobility behavior of the communicating mobile nodes. We present a comparative analysis of tuning refresh timers of a proactive Optimized Link State Routing protocol (OLSR) when mobile are moving under at different mobility patterns. Findings: Routing protocol in mobile ad hoc network is highly impacted by the mobility behavior of the communicating nodes. In addition to that, the impact of setting the rate at which the refresh messages are being broadcasted in a network varies depending on the mobility behavior of communicating mobile nodes. We observed the impact of tuning HELLO intervals on the performance of optimized link state routing protocol on mobile nodes moving under different mobility models. From our observation, we learn that the settings of HELLO interval on a network of mobile nodes have different impacts depending on the mobility behavior of mobile nodes and node density. Improvements/Applications: The dynamic timer for refreshment of topology information can improve the performance of routing protocol. In addition, application-specific mobility model is required for routing protocol.