Keywords: sensor networks, congestion, load balancing, data aggregation, security
Received March 17, 2008; revised July 16 & August 29, 2008; accepted November 12, 2008.
Communicated by Ten-Hwang Lai.
| Previous | [ 1] | [ 2] | [ 3] | [ 4] | [ 5] | [ 6] | [ 7] | [ 8] | [ 9] | [ 10] | [ 11] | [ 12] | [ 13] | [ 14] | [ 15] | [ 16] | [ 17] | [ 18] | [ 19] |
¡@
SUAT OZDEMIR
Computer Engineering Department
Gazi University
Ankara, 06570 Turkey
In wireless sensor networks, sensing driven nature of data generation and uneven
cluster sizes result in unbalanced data traffic load among clusters. Clusters in which the
event generation rate is high and/or clusters that have more members than others suffer
from congestion and data loss which negatively affect the accuracy of the collected data.
In addition, the cluster heads of such clusters exhaust their energy earlier than others,
thereby reducing the network lifetime. Hence, the data load among clusters must be balanced
to preserve the data accuracy and prolog the network lifetime. This paper presents
Secure Load Balancing (SLB) protocol and introduces pseudo-sinks in order to improve
data accuracy and bandwidth utilization of wireless sensor networks while still providing
secure communication. Simulation results show that, in comparison with traditional cluster
based networks, SLB protocol improves the data accuracy and increases the data delivery
rate in the presence of security constraints.
Received March 17, 2008; revised July 16 & August 29, 2008; accepted November 12, 2008.
Communicated by Ten-Hwang Lai.