Problem is to design an energy efficient approach for sensor
nodes communication. The main consideration is WSN where
nodes are scattered randomly, uniformly over the network.
The location of the base node is fixed and has an unlimited
power source. The sensor nodes communicate directly with
each other and can also correspond with base station. The
sensor nodes fuse the packets received from the network and
produce one packet as a result. To overcome the energy
problem, two protocols are proposed in which the head node
delivers the data collected from the other sensor nodes to the
base station, which increases the number of rounds and over
all life time of the network. The lifetime of network is defined
as the number of rounds till the particular node has sufficient
energy but it depends upon what type of service is provided by
sensor node. In real time the quality of the system is decreased
when the first node in the network does not have sufficient
amount of energy and becomes dead. In TBEEP, a minimum
spanning tree is created after every round and head node is
selected from each tier which sends the data to the Base
station for particular threshold energy. [f the threshold energy
is less than or equal to dead energy the node is removed from
the network field. [n CBEEP the relay nodes are deployed
randomly with sensor node and the energy of relay node is
greater than the sensor nodes. The relay node is a cluster head
that sends the data to base station through other relay nodes.