On the channel modelling and transmission power control for wireless sensor networks

ABSTRACT

In battery powered wireless sensor networks, energy efficiency is one of the most important considerations. Based on field experiments on some typical wireless sensor network, we proposed to explicitly use radio models in transmission power control. We evaluated a parallel Expectation-Maximization (EM) scheme for realtime channel tracking. Simulations show that this method can result in considerable reduction on the transmission power.

REFERENCES

• 1: W. Ye, J. Heidemann, and D. Estrin, An energy-efficient MAC protocol for wireless sensor networks, Proc. of the 21st Joint Conf. of the IEEE Computer and Comms. Societies, 2002.
• 2: Louis L. Scharf, Statistical Signal Processing Detection, Estimation, and Time Series Analysis. Addison-Wesley, 1991.
• 3: Theodore Rappaport, Wireless Communications: Principles and Practice, Prentice Hall PTR, Upper Saddle River, NJ, 2001

INDEX TERMS

Primary Classification:
  C. Computer Systems Organization
  C.2 COMPUTER-COMMUNICATION NETWORKS
      C.2.1 Network Architecture and Design

Keywords:
expected maximization, wireless sensor network