DECISION MAKING BASED ON THE DIJKSTRAS ALGORITHM A SOLUTION FOR COGNITIVE RADIO

One of the functions that Cognitive Radio performs is the spectrum decision making, this is considering the analysis of its environment. This work proposes an algorithm for the selection of a band in the spectrum based on the idea of the Dijkstra's Algorithm. In order to find the shortest path, which corresponds to the selection of a spectrum band, it is required to specify the attributes or parameters to consider for each of the bands according to the application or service required. Values, i.e., weights, are allocated to each attribute which determine the priorty or significance of each service. The proposed algorithm based on Dijkstra evaluates the parameters that characterize a collection of bands considering the weights assigned and, this indicates which band should be selected according to the decision making criteria. Computer simulations were performed to characterize the Best Effort and Real Time applications. These resulting in latency reduction in the selection process of the band which represents a practical time for the algorithm implementation in a Cognitive Radio for the decision making process. It was also observed that the selection time acquired improves in contrast to the results obtained by implementing the Al-IP Algorithm.