SAMER+: Balancing short term throughput and long term stability in cognitive radio mesh networks
Li Sun, Selvaganesh Dharmeswaran, Aswin Gokulachandran, Ashish Kumar, Dimitrios Koutsonikolas · 2016
A large number of routing protocols for Cognitive radio networks (CRNs) have been proposed recently, each based on different design goals, and evaluated in different scenarios, under different assumptions. In our previous work, we conducted the first extensive empirical performance study of routing protocols for CRNs-Coolest Path, SAMER, and CRP - under the same realistic set of assumptions. Our study revealed that SAMER significantly outperforms the other protocols under low primary user activity but its performance degrades under high PU activity. In this work, we introduce an enhanced version of SAMER (SAMER+) that performs consistently well in both low and high PU activity scenarios. The core of SAMER+ is a new path metric that balances short term throughput and long term path stability. We evaluate SAMER+ using extensive simulations and compare it against SAMER and Coolest Path. Our results show that SAMER+ significantly outperforms both protocols in a variety of scenarios.