A Comparative Study on Low Energy Optimization Techniques in WSN

Abstract: Sensor networks are mostly distributed over a large area which may sometimes be harsh and uneven. Therefor the system must be tolerant to faults raised by the environment and also other intermittent problems. Therefore it is very important that the sensed values and readings of each and every sensor node must be accurate and reliable. Therefore, for the purpose of validation, various online and offline methods are used. ATE is a hardware test used to test the readings. But ATE capabilities can’t match the test requirements in terms of volume and speed. BIST is a test embedded within the system itself. But it has certain disadvantages like hardware and area overhead and also elevated power dissipation. Therefore SBST plays an important role in testing the sensor node. The SBST routines are used for this purpose. They can either be downloaded to the nodes or they may be available in the flash memory also. Various optimization methodologies have been discussed in the paper.

Keywords: WSN, optimization, SBST