Interference aware shortest route selection in energy constrained cognitive radio ad-hoc networks
Soodeh Amiri Doomari, Ghasem Mirjalily · 2016
Cognitive Radio (CR) technology enables the opportunistic use of the vacant licensed frequency bands; therefore improves the spectrum utilization. CR operation must not interfere with the transmissions of the licensed or primary users. In order to achieve this, a tradeoff between primary user protection and CR network performance must be considered. To solve this problem, we propose a new shortest path interference aware routing algorithm for energy constrained Cognitive Radio Ad-Hoc Networks by considering two types of utility functions. First novelty of the algorithm is using the load balancing technique to improve the survivability of the nodes. The second one is considering the area of overlap between coverage areas of the secondary and primary users as a routing metric. The effectiveness of these new strategies is validated by evaluating the aggregate interference from secondary users to primary users, average end-to-end delay and average goodput. A comprehensive numerical evaluation is performed which shows that the performance of the proposed algorithm is significantly better than the well-known SER protocol proposed in [1].