Lifetime of a CDMA wireless sensor network with route diversity

Energy conservation is one of the most important issues in wireless ad hoc and sensor networks, where nodes are likely to rely on limited battery power. This paper analyzes the performance of a CDMA WSN, in terms of lifetime of the network, where nodes are placed in a random fashion. A routing protocol is proposed and simulated where selection of intermediate nodes is governed by a parameter which combines the estimation of detection probability of neighbors in presence of large scale fading, and maximum advanced distance with respect to the final destination. Further, the proposed routing scheme is modified by incorporating route diversity. Lifetimes are analyzed in both the cases and compared. Effects of detection probability, shadowing, and route diversity on lifetime are investigated.