• Journal of the Korean Institute of Intelligent Systems
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• v.23 no.3
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• pp.196-201
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• 2013

In this paper, we propose an asynchronous and adaptive message passing scheme based on S-MAC for handling with the problem on energy efficiency in wireless sensor networks. The proposed scheme consists of a policy that differentiate transmission errors caused by packet collision or radio interference from congestion errors caused by buffer overflow and a method that adaptively controls the size of a fragment according to the variance of traffic loads. Especially, it presents a method that highly reduce the energy consumption by keeping the size of fragment not being excessively smaller than the one that may result in rapid increment of the total transfer time. Finally, with the simulation results we show that network throughput and delay are improved by using the proposed message passing scheme.

• Proceedings of the Korea Information Processing Society Conference
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• 2012.11a
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• pp.741-742
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• 2012

This paper gives an asynchronously adaptive message passing scheme for selective retransmission of dropped packets based on a different fragment in size according to both the type of cause that makes packet loss and variation of traffic load in vehicle wireless communication networks. With the proposed scheme, it is possible to enhance the correctness for under-standing awareness of current network situation and to reduce the number of control packets by increasing or decreasing the size of a fragment along with the changes in network traffic load.