A Range Based Localization Algorithm Using Autonomous Speed Mobile Sink (MOBISPEED) in Distributed Wireless Sensor Networks

Ubiquitous computing technology is expected to become very small and reasonably cheap in the future, large amounts of electronic items can be deployed almost everywhere. Localization of sensor nodes is important in many respects in wireless sensor networks. First, it informs the remote end user of the precise location within a network where the specific “event’ of interest took place. Second, in case of node failure, identification can be made for the network area within the sensor network which is affected. Similarly, the known location of sensor node helps in coming up with efficient routing paths to the sink, which is mobile, is used to track the event driven sensor nodes in the path of the event, thus conserving energy and time. In wireless sensor networks, the capabilities of individual sensor nodes are extremely limited and therefore collaboration is required with minimum energy expense.

As Information without location is meaningless in sensor networks, Localization plays an important role in coming up with an efficient inter-node collaboration. With this scheme, the ordinary sensor nodes do not need to spend energy on neighboring interaction for localization. The localization mechanism has been implemented in TOSSIM. The simulation results show that our scheme performed better than other range-based schemes.