Link-Quality-Aware Resource Allocation With Load Balance in Wireless Body Area Networks
Link-Quality-Aware Resource Allocation With Load Balance in Wireless Body Area Networks
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DOI：
10.1109/jsyst.2015.2458586
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发表时间：
2018-03
影响因子：
4.4
通讯作者：
Amit Samanta;Samaresh Bera;S. Misra
中科院分区：
文献类型：
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作者：
Amit Samanta;Samaresh Bera;S. Misra
由于来自其他共存无线体域网 (WBAN) 的干扰，特定 WBAN 和接入点 (AP) 之间的链路质量差异很大。因此，WBAN的性能随着链路质量的变化而变化。此外，WBAN不必要地尝试将其实时数据发送到汇聚节点，而相应的链路质量却下降到预定义的阈值以下，以维持足够的网络性能。为了解决这种情况，在本文中，我们提出了一种 WBAN 中的链路质量感知资源分配方案，旨在最大限度地提高整体网络性能。所提出的方案由两个阶段组成：临时链路质量测量和 WBAN 之间的子信道分配。在前者中，我们预测链路质量不同方面之间的相关性。基于可用的相关链路质量，子信道分配阶段将可用带宽划分为多个子信道以维持网络的服务质量。所提出方案的性能根据不同的性能指标进行评估——路径损耗、吞吐量、死节点数量和WBAN的公平性指数。仿真结果表明，如果在 WBAN 和可用 AP 之间进行链路质量感知资源分配，则 WBAN 的性能会显着提高。
Due to interference from other coexisting wireless body area networks (WBANs), link quality between a particular WBAN and access points (APs) significantly varies. Consequently, the performance of a WBAN varies with the changes in the link quality. Additionally, a WBAN unnecessarily tries to send its real-time data to the sink node, whereas the corresponding link quality drops below a predefined threshold value, to maintain adequate network performance. To address this situation, in this paper, we propose a link-quality-aware resource allocation scheme in WBANs—an effort toward maximizing the overall network performance. The proposed scheme consists of two phases—temporal link quality measurement and subchannel allocation among the WBANs. In the former, we predict correlations among different aspects of link quality. Based on the available correlated link qualities, the subchannel allocation phase divides the available bandwidth into several subchannels to maintain the quality of service of the network. The performance of the proposed scheme is evaluated based on different performance metrics—path loss, throughput, number of dead nodes, and fairness index of WBANs. The simulation results show that the performance of a WBAN significantly increases, if the link-quality-aware resource allocation is made between a WBAN and available APs.