The modification of the well known GPSR
routing protocol, with the concept of lifetime is proposed.
The lifetime is calculated between the node and each of its
neighbors. A lifetime timer is set to the lifetime value. This
timer helps in determining the quality of link and duration
of the neighbor's existence. During the next hop selection
process, the node selects the neighbor which is closest to
the destination with good link quality and non-zero
lifetime timer value in contrast to GPSR. This results in
appropriate selection of the next hop node in a highly
mobile and noisy environment, thus reducing the packet
loss. The simulation is conducted for two scenarios where
the source and destination are travelling in same and
opposite directions. The results showed that GPSR with
Lifetime achieved 20% to 40% increase in the packet
delivery rate and significant improvement in packet
delivery ratio for different "HELLO" message intervals
when compared to GPSR.