Two-Tiered Network Design Architecture for Collision Avoidance Protocol in Wireless Sensor Networks

Abstract

Collision avoidance multiple access plays a significant role in Wireless
Sensor Networks (WSN) as there may have a huge number of nodes in a network.
Therefore, it has big chance to conflict when they want to send a packet to the server at
the same time. In our work, we focus on the sensor networks with two-tier network design
architecture that composed of simple function nodes and presented performance analysis
of the proposed collision avoidance multiple access protocol for Wireless Sensor
Networks, with emphasis on the contention process exercising in each contention subframe.
Then we also examine the efficiency of the overall system based on the simulation
results. The results shows that using different parameter of n, m, and k then the successful
probability tends to increase, however after certain value of n, the successful probability
will decrease. Regarding the overall system efficiency, Esys, in order to get the optimum
value of system efficiency, we have to maximize α. It is obvious that the bigger value of β
will produce bigger value of α. That is mean a shorter contention sub-frame leads to a
better efficiency of the systems, if Lr (average length of transmission sub-frame) is fixed.