Environmental Cognition Based Wireless Mesh Network Cross-layer Routing Protocol

摘要

This paper takes Optimized Link State Routing as prototype to design a cross-layer based proactive routing protocol CM-OLSR (Cross-layer Metric based Optimized Link State Routing). This protocol uses a brand-new routing metric CLM (Cross-layer Metric), introduces the idea of environmental cognition in Cognitive Wireless Network and senses link quality impact factors of node available bandwidth, node load, link delivery rate and link interference trough cross-layer operation mechanism. The metric is taken as a basis of route calculation and selection to optimize the route selection. This paper also proposes a routing damping mechanism which effectively avoids the route flapping problem easily induced by load-sensitive routing metric while fully using the network resources. The simulation results show that CM-OLSR can improve the network throughput, reduce the end-to-end delay and achieve load balancing routing results.