Abstract
Wireless ad hoc sensor networks differ from wireless
ad hoc networks from the following perspectives: low energy,
lightweight routing protocols, and adaptive communication patterns.
This paper proposes an energy-aware routing protocol (EARP)
suitable for ad hoc wireless sensor networks and presents an
analysis for its energy consumption in various phases of route
discovery and maintenance. Based on the energy consumption
associated with route request processing, EARP advocates the
minimization of route requests by allocating dynamic route expiry
times. This paper introduces a unique mechanism for estimation of
route expiry time based on the probability of route validity, which is
a function of time, number of hops, and mobility parameters. In
contrast to AODV, EARP reduces the repeated flooding of route
requests by maintaining valid routes for longer durations.