J4 ›› 2010, Vol. 37 ›› Issue (2): 279-284.doi: 10.3969/j.issn.1001-2400.2010.02.017

• Original Articles • Previous Articles     Next Articles

Mobility supporting adaptive MAC protocol in WSN

CHEN Chen;GAO Xin-bo   

  1. (State Key Lab. of Integrated Service Networks, Xidian Univ., Xi'an  710071, China)
  • Received:2009-08-18 Online:2010-04-20 Published:2010-06-03
  • Contact: CHEN Chen E-mail:cc2000@mail.xidian.edu.cn

Abstract:

A mobility supporting adaptive MAC protocol RM-MAC (RSSI based Mobility support MAC) in the wireless sensor network is proposed. First, we quantize the nodes' receiving range and get the neighboring nodes list based on quantized RSSI values.Then, using the Kalman filter model, we predict the mobile nodes' position vector after an investigated period. Finally, employing the quantized RSSI values and forecasted position vectors, we build the dynamic synchronization adjustment model within the virtual clusters in order that the clusters can maintain a high connectivity with mobile nodes. Simulation results show that compared with S-MAC, RM-MAC can obtain a higher network connectivity and delivery ratio by dynamically adjusting the synchronization frequency at a price of sacrificing certain energy. Furthermore, we find that the delivery ration has a close relationship with the quantification level and cluster switch threshold.

Key words: wireless sensor networks, network protocols, RSSI, mobility support