Energy-efficient MAC Protocol using Directional Antennas in IEEE 802.11- Based Wireless Sensor Networks

David O. Olowokere; Abayomi M. Ajofoyinbo

This paper presents an energy-efficient medium access control (MAC) protocol using directional antennas in IEEE 802.11- based wireless sensor networks. In the IEEE 802.11 standard, every transmitted frame has duration value (DV). The DV indicates the time needed to transmit remaining segments and acknowledgement frame. However, packet corruption, poor link quality and multipath propagation may affect the initial predicted transmission time, and this may lead to inefficient duty cycling by neighboring sensor nodes. The new DV-based MAC (DV-MAC) protocol addresses this concern by developing a new approach for estimating effective DV, thereby providing more efficient duty cycling for wireless sensor nodes and reducing interference(s) from neighbouring sensor nodes of the receiver sensor node. The efficacy of this protocol is tested via numerical analysis which is implemented in Visual C++ and MATLAB Software. It is shown by the results obtained that this new protocol will further improve energy efficiency by reducing interferences in wireless sensor networks.

Select Volume / Issues:

• Volume 6,Issue 5, Sept. 2015

Year:

2015

Type of Publication:

Article

Keywords:

Directional Antennas; Duration Value; Frame; Transmission; Reception; MAC Protocol; Wireless Sensors

Journal:

IJECCE

Volume:

6

Number:

5

Pages:

548-557

Month:

September