Abstract

Interference is one of the major problems in Wireless Sensor Networks (WSNs). Since WSNs are typically operating on the shared and unlicensed spectrum band, interference may not be controllable especially under the coexistence of devices in different wireless networking standards operating in the same area. Collection Tree Protocol (CTP) is a routing protocol that is able to support large scale WSNs. With its ability, low level interference can be overcome by the routing process. Proposed algorithm in this paper uses an advantage of a traditional CTP with the adaptation of CTP, so called multi-channel CTP [1] in large scale WSNs along with our proposed enhancement scheme, which integrates intelligent decision making engine. The overall system provides the solution to detect an area of interference that affects the system and makes decision on suitable mechanism according to the current interference scale i.e. rerouting or channel switching method. The proposed system is evaluated via system level simulation and results show the system performance enhancement under severe interference scenario in comparison with the traditional CTP and the multi-channel CTP.

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