An energy-efficient MAC protocol with random listen-sleep schedule for wireless sensor networks

Sung Chan Choi, Jang Won Lee, Yeonsoo Kim, Hakjin Chong

Research output: Chapter in Book/Report/Conference proceedingConference contribution

11 Citations (Scopus)


In this paper, we propose an energy efficient MAC protocol for wireless sensor networks. Since sensor nodes are equipped with a limited energy of batteries, reducing energy consumption is a critical issue for extending network lifetime. To resolve this issue, we adopt a listen-sleep cycle as in S-MAC [1], allowing sensor nodes to turn their transceiver off during a sleep period. In S-MAC, sensor nodes have a fixed duty cycle and a synchronized scheduling in a virtual cluster. Hence, in S-MAC, it is not easy to adapt to the variation of network environment. Moreover, due to the synchronized scheduling, transmission collisions will increase resulting in energy waste and low throughput. To cope with such inefficiencies in S-MAC, we propose probability sensor MAC (PS-MAC), in which each node determines 'listen' or 'sleep' pseudo-randomly based on its own pre-wakeup probability and pre-wakeup probabilities of its neighbor nodes in each time slot. This allows the listen-sleep schedule of each transmitter and receiver pair to be synchronized while that of rest of nodes can be asynchronous. Therefore, collisions can be reduced even under heavy traffic conditions resulting in reducing energy waste and achieving high throughput. In addition, since pre-wakeup probability of each node can be adjusted adapting to the change of the network environment, by dynamically adjusting pre-wakeup probabilities of sensor nodes, system throughput can be further improved.

Original languageEnglish
Title of host publicationTENCON 2007 - 2007 IEEE Region 10 Conference
Publication statusPublished - 2007
EventIEEE Region 10 Conference, TENCON 2007 - Taipei, Taiwan, Province of China
Duration: 2007 Oct 302007 Nov 2

Publication series

NameIEEE Region 10 Annual International Conference, Proceedings/TENCON


OtherIEEE Region 10 Conference, TENCON 2007
Country/TerritoryTaiwan, Province of China

All Science Journal Classification (ASJC) codes

  • Computer Science Applications
  • Electrical and Electronic Engineering


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