—Wireless Sensor Network is a set of sensors
deployed in the area of interest, for the purpose of
monitoring physical or environmental conditions. Due to
limited battery capacity of sensors, Wireless Sensor
Networks have limited lifetime. A large number of sensors
deployed in a circular grid, sending the sensed data to
base station located at the center are considered and the
parameters of interest are monitored. This paper
proposes three algorithms to enhance the lifetime,
reliability and throughput of the Wireless Sensor
Network. The first two algorithms Reliable Zone Based
Transmission (RZBT) and Reliable Circular
Transmission (RCT) reschedule the packet transmission
time of the sensor nodes, to reduce the loss of packets and
ensures reliability of network functioning. The third
algorithm Energy Efficient Reliable Transmission
(EERT) reduces the number of transmissions, without the
loss of data, thus extending lifetime of the network.
Simulation results prove that 1) RCT outperforms
conventional DiReCt Transmission (DRCT) and RZBT
with respect to throughput and 2) EERT reduces the
packets transmitted in each round, thus improves the
lifetime of the sensor node and the network
