Abstract
Wireless Mesh Network (WMNs) is a promising technology that has been accepted favorably by the Internet Service Providers (ISPs). ISPs use it to provide last mile broadband Internet connectivity to the end users. This popularity arises from the fact, that it inter operates well with diverse wireless systems and provides robust fault tolerance with a high degree of redundancy and reliability. Routing metrics plays a crucial part in the performance of WMN. When routing protocols are implemented, the routing metric is assigned to different paths. It calculates the optimum path to predict the best routing path. These are integrated in routing protocols to improve WMNs efficiency in terms of reliability, latency, throughput, error rate and cost. This paper compares the impact of using load balancing interference aware routing metric (LBIARM) on the performance of Multi-Channel Multi Radio WMNs (MCMR WMNs). The performance of LBIARM was evaluated by comparing it with popular standard metrics weighted cumulative expected transmission time metric and Hop Count metric. OPNET Modeler 17.5 PL1 was used as a simulation tool for implementation. Simulation results show the effectiveness of using LBIARM metric on MCMR WMNs.
Highlights
The most Weighted Cumulative Expected Transmission Time (WCETT) was presented by Draves [16] to enhance the Expected Transmission Time (ETT) metric in the multi radio mesh networks by taking into account the diversity of the channels
When the number of radios was increased to 4, a substantial difference was observed between Load Balancing Interference Aware Routing Metric (LBIARM) and WCETT
When more than one radio is selected, it is observed that LBIARM can improve end to end delay by minimizing the latency by 80% and 16 % from Hop Count and WCETT respectively
Summary
Least weight paths can be discovered proficiently The weakness of this metric is that it does not address interference, channel diversity, varying load of the link and capacity of the load. It finds path having poor throughput and high packet loss ratio. The most WCETT was presented by Draves [16] to enhance the ETT metric in the multi radio mesh networks by taking into account the diversity of the channels. The first term sums up individual link ETTs while the second term sums up the ETTs of every link of a given channel This adds channel diversity to the routing metric causing low intra-flow interference.
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