Lifetime maximisation with guaranteed minimum end-to-end energy consumption scheme for virtual multiple-input-multiple-output in wireless sensor networks

ABSTRACT

Network lifetime is one of the serious issues of energy-starved Wireless Sensor Networks (WSNs). In this paper, an Extended Lifetime with Minimum Energy Consumption (ELMEC) scheme is proposed for reducing energy consumption of cooperative communication in WSN and to increase the network lifetime. The transmission distance, number of cooperating nodes of the Virtual Multiple-Input-Multiple-Output (V-MIMO) and the modulation order are jointly optimised by the proposed scheme to augment the network lifetime and to consume minimum end-to-end energy. The total energy consumption per bit and network lifetime of the proposed scheme is compared with traditional minimum energy consumption scheme. It is observed that the proposed ELMEC scheme achieves significant increase in lifetime (i.e. 5.61 times, 9.61 times and 15.74 times more at Bit Error Rate (BER) of 10⁻³, 10⁻⁴ and 10⁻⁵ respectively) at the cost of slightly increased total energy consumption per bit (1.20 times, 1.23 times and 1.19 times more at BER of 10⁻³, 10⁻⁴ and 10⁻⁵ respectively) when compared with traditional scheme. Also, the proposed scheme is associated with much lower computational complexity than the traditional scheme; therefore, the proposed ELMEC scheme is suitable for prolonging the lifetime of the applications which demands high-quality reception signals.

KEYWORDS:

• Bit error rate
• cooperative communication
• energy efficiency
• MIMO
• network lifetime
• SIMO
• STBC
• wireless sensor networks

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Notes on contributors

K. Senthil Kumar

K. Senthil Kumar received Ph.D. from Anna University, Chennai, India in the year 2018. He received his Master’s Degree from Rajalakshmi Engineering College, Chennai at 2009. In the year 2002, he received his Bachelor’s Degree in Engineering from Bharath Niketan Engineering College, Theni, which was affiliated to MK university, Madurai, India. His research interests include wireless communications, information & coding theory and MIMO wireless communication systems.

R. Amutha

R. Amutha is an Engineer by qualification, have obtained her Doctorate in the year 2006 from Anna University, Chennai and Masters from PSG college of Technology and Bachelors in Electronics & Communication Engineering from Thiagarajar college of Engineering in the year 1987. She is presently working as a Professor in the department of ECE at SSN college of engineering, Chennai. Her research interests include WSN and coding theory.