Smart spectrum allocation for interference mitigation in Wireless Body Area Networks

Abstract

In this paper, a dynamic resource allocation scheme is proposed to avoid interference amongst coexisting Wireless Body Area Networks (WBAN). In the proposed scheme, each WBAN generates a table consisting of interfering nodes from coexisting WBANs in its vicinity. Then each WBAN broadcasts this table to its neighbors, which allows for efficient interpretation of an Interference Region (IR) between each pair of WBANs. The nodes in the IR are later allocated orthogonal sub-channels; whilst nodes that do not exist in the IR can potentially transmit in the same time interval. We further demonstrate a precise tradeoff between the minimum interference level and spatial reuse. Simulation results show that our proposed scheme has far better spectral efficiency compared to the conventional orthogonal schemes, whilst maintaining an acceptable interference level. We also provide mathematical analysis on the proposed scheme to validate its efficiency for increasing spectral efficiency and avoiding interference. To further reduce the interference level, we propose a probabilistic approach, and analytically show that the outage probability can be effectively reduced at the cost of very small change in the spatial reuse factor.

Distributed scheme for interference mitigation of coexisting WBANs using Latin rectangles

“…Example schemes that pursue the spectrum allocation methodology include [6], [9], [7], [13]. In [6], a distributed spectrum allocation is proposed where inter-WBANs coordination is considered, the interfering sensors belonging to each pair of WBANs are assigned orthogonal sub-channels.…”

“…Example schemes that pursue the spectrum allocation methodology include [6], [9], [7], [13]. In [6], a distributed spectrum allocation is proposed where inter-WBANs coordination is considered, the interfering sensors belonging to each pair of WBANs are assigned orthogonal sub-channels. Whereas, Movassaghi et al, [9] have proposed an adaptive interference mitigation scheme that operates on different parameters (e.g., nodes' traffic priority, signal strength, etc,) and allocates synchronous and parallel transmission intervals for interference avoidance.…”

“…In this section, we compare the performance of DAIL with the smart spectrum allocation scheme, denoted by SMS [6], which assigns orthogonal channels to interfering sensors belonging to each pair of coexisting WBANs. The simulation parameters are provided in table II.…”

Interference avoidance algorithm (IAA) for multi-hop wireless body area network communication

“…Whilst, researchers of [14] proposes a distributed interference detection and mitigation scheme through using adaptive channel hopping. Whereas, research works of [12] proposes a dynamic resource allocation scheme for interference avoidance among multiple coexisting WBANS through using orthogonal subchannels for high interfering nodes.…”

A Comparative Analysis of Single-Hop and Multi-hop transmission using EERDT Protocol in Mobile and Critical Scenario for WBAN

“…While, COLAEEBA (Cooperative Link Aware Energy Efficient Routing for Body Area) works on the basis of cooperation, and source nodes are utilized more than one link at the same time. In [17], authors proposed a dynamic resource allocation scheme to avoid the interferences amongst coexisting WBAN, using a table in which activity of nodes interference are updated. Authors also provide a mathematical analysis to validate its efficiency and a probabilistic approach to reduce the interference level.…”