Date Added: Mar 2012
One of the up coming technologies is the wireless sensor network and now it has attained much consideration from the field of research. A sensor network consists of numerous small devices which are inexpensive and organize itself into an ad-hoc system. The wireless sensor network monitors the physical environment to collect the data and transfers it to the other sink nodes in the network. Usually, in the sensor nodes the range of radio transmission varies in the orders of the magnitude that is lesser than geological coverage of the network. Hence hop by hop technique is used in transmitting the information to the sink.