| Previous | [ 1] | [ 2] | [ 3] | [ 4] | [ 5] | [ 6] | [ 7] | [ 8] | [ 9] | [ 10] | [ 11] | [ 12] | [ 13] | [ 14] | [ 15] | [ 16] | [ 17] | [ 18] | [ 19] | [ 20] |
¡@
JANG-PING SHEU1,2, LI-JEN CHANG2 AND WEI-KAI HU2
1Department of Computer Science
National Tsing Hua University
Hsinchu, 300 Taiwan
2Department of Computer Science and Information Engineering
National Central University
Chungli, 320 Taiwan
In wireless sensor networks, congestion occurs when the traffic load being offered
exceeds the available capacity of sensor nodes. In most applications, every sensor node
will send the event it has sensed to a sink node. This operation makes the sensors closer
to the sink, resulting in congestion. Congestion may cause packets loss, lower network
throughput and sensor energy waste. To address this challenge, there is a proposal for a
distributed algorithm that mitigates congestion and allocates appropriate source rate to a
sink node for sensor networks. The proposed algorithm is a hybrid congestion control
protocol that considers not only the packets delivery rate but also retains the buffer size
of each node. The proposed protocol may avoid packets drop due to traffic congestion
and improve the network throughput. The simulation results show that the performance
of the proposed protocol is better than the previous works.
Received September 4, 2007; revised April 9, 2008; accepted May 2, 2008.
Communicated by Ten-Hwang Lai.
* This paper was partially supported by the National Science Council of Taiwan, R.O.C. under grant No. NSC
96-2221-E-007-174.