Energy Efficient MAC Protocols in Wireless Body Area Sensor Networks -A Survey

TL;DR

This survey analyzes energy-efficient MAC protocols for Wireless Body Area Sensor Networks, comparing techniques and models, and suggests hybrid modes for optimal power consumption and energy efficiency.

Contribution

It provides an analytical comparison of MAC protocols, path loss models, and power consumption techniques, proposing hybrid modes for improved energy efficiency in WBASNs.

Findings

Path loss is higher in In-body communication.

CSMA/CA consumes less power than beacon mode.

Hybrid modes enhance energy efficiency.

Abstract

In this paper, we first presented an analytically discussion about energy efficiency of Medium Access Control (MAC) protocols for Wireless Body Area Sensor Networks (WBASNs). For this purpose, different energy efficient MAC protocols with their respective energy optimization techniques; Low Power Listening (LPL), Scheduled Contention and Time Division Multiple Access (TDMA), are elaborated. We also analytically compared path loss models for In-body, On-body and Off-body communications in WBASNs. These three path loss scenarios are simulated in MATLAB and results shown that path loss is more in In-body communication because of less energy level to take care of tissues and organs located inside human body. Secondly, power model for WBASNs of Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA) and beacon mode is also presented. MATLAB simulations results shown that power of CSMA/CA mode is less as compared to beacon mode. Finally, we suggested that hybrid mode is more useful to achieve optimization in power consumption, which consequently results in high energy efficiency.