Regresar

Heuristic channel assignment mechanism for WSN in congested ISM bands based on QoS

Abstract:

Densely populated urban areas are continuously demanding an increase in the number of new services, many of them involving Wireless Sensor Networks (WSN). The dramatic increase in the use of WSN overcrowds the Industrial, Scientific and Medical (ISM) spectrum band. Parallel to this, other massive wireless devices such as local area networks (WLAN), Bluetooth, among others, occupy the same congested spectrum band. This scenario could be subject to uncontrollable levels of interference, leading to severe limitations on WSN performance. On this basis, this paper considers imperative the analysis of these types of future scenarios, under extreme capacities evaluating their operational limits, to find the appropriate mechanisms that will allow WSN to overcome urban interference restrictions. Then, under these considerations, a heuristic channel assignment mechanism with low processing levels is proposed. The heuristic mechanism substantially improves the performance of WSN under strong interferences distributing among the coordinators in the scenario, high channel capacities with a performance close to an optimum solution (developed in this work as a benchmarking solution), but well above those currently obtained by the standard channel allocation method.