Distributed Scheme for Interference Mitigation of WBANs Using Predictable Channel Hopping

TL;DR

This paper introduces CHIM, a distributed interference mitigation scheme for coexisting WBANs that uses Latin rectangle-based predictable channel hopping to reduce collisions, delay, and energy consumption.

Contribution

The paper proposes a novel Latin rectangle-based channel hopping scheme for WBANs that minimizes interference and improves transmission efficiency.

Findings

CHIM reduces collision probability among coexisting WBANs.

Simulation results show decreased transmission delay and energy consumption.

Mathematical analysis confirms the effectiveness of the scheme.

Abstract

When sensors of different coexisting wireless body area networks (WBANs) transmit at the same time using the same channel, a co-channel interference is experienced and hence the performance of the involved WBANs may be degraded. In this paper, we exploit the 16 channels available in the 2.4 GHz international band of ZIGBEE, and propose a distributed scheme that avoids interference through predictable channel hopping based on Latin rectangles, namely, CHIM. In the proposed CHIM scheme, each WBAN's coordinator picks a Latin rectangle whose rows are ZIGBEE channels and columns are sensor IDs. Based on the Latin rectangle of the individual WBAN, each sensor is allocated a backup time-slot and a channel to use if it experiences interference such that collisions among different transmissions of coexisting WBANs are minimized. We further present a mathematical analysis that derives the collision probability of each sensor's transmission in the network. In addition, the efficiency of CHIM in terms of transmission delay and energy consumption minimization are validated by simulations.