“Guardian” protocol for mobile wireless sensor networks

Addressing the complexity of mobile wireless sensor networks for defining dynamic network architecture and routing table, the Guardian protocol had been extended for wireless sensor network. It has extended protocols for mobility channel for managing the mobility of sensor nodes, control channel for establishing the session and the traffic channels. This modified version has a multiple routing mode unlike previous guardian protocol which had only one routing mode which was default routing through guardian node and linking nodes. Coupled with the multiple traffic channels the protocol has incorporated the flexibility in routing and high speed data transfer. De facto algorithms for handling such a complex scenario have been developed with major enhancements to the stationary Guardian Protocol. Additional hardware for Self Position Tracking had been implemented on each node. The self-tracking system and the mutual tracking system coordinate together for determining the position of each node. In this paper we describe the solutions of adaptive ad-hoc network architecture and dynamic routing for mobile wireless sensor networks. Minimum constrains were imposed on node mobility of wireless sensor nodes. We evaluate presented method using simulations. Implementation of the protocol has shown that by employing mutual and self tracking approach to the mobile nodes the nodes can be tracked within 5-10 relative percent error range even in cases of high mobility. Also the protocol when implemented in the case of mobile nodes with dynamic routing table supported by nick node ID tables has gives the flexibility of providing multiple routing paths.