Performance Analysis and Enhancements for In-Band Full-Duplex Wireless Local Area Networks
Performance Analysis and Enhancements for In-Band Full-Duplex Wireless Local Area Networks
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DOI：
10.1109/access.2020.3001876
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发表时间：
2020-01-01
期刊：
影响因子：
3.9
通讯作者：
Eltawil, Ahmed M.
中科院分区：
文献类型：
--
作者：
Murad, Murad;Eltawil, Ahmed M.
带内全双工（IBFD）是使无线节点能够在相同频带上同时发送信号和接收另一信号的技术。因此，与传统的半双工（HD）系统相比，IBFD无线系统理论上可以提供高达两倍的信道容量。为了研究IBFD网络的可行性，需要可靠的模型来捕获IBFD在物理层（PHY）之上的预期益处。本文提出了一种基于离散时间马尔可夫链（DTMC）分析的具有IBFD功能的IEEE 802.11分布式协调功能（DCF）的精确分析模型。该模型捕获了计算重要性能指标所需的所有参数，这些指标量化了IBFD解决方案带来的增强功能。此外，两个帧聚合方案的无线局域网（WLAN）与IBFD功能，以提高数据传输的效率。匹配的分析和仿真结果小于1%的平均误差证实，所提出的帧聚合方案进一步提高整体吞吐量高达24%，并减少高达47%的延迟在实际的IBFD-WLAN。更重要的是，结果断言，IBFD传输只能减少延迟到一个次优的点在WLAN中，但帧聚合是必要的，以尽量减少它。最后，能源效率进行了比较HD和IBFD网络。与HD对应物相比，IBFD系统可以以更高的功耗为代价为给定的业务场景提供上级能量效率。
In-Band Full-Duplex (IBFD) is a technique that enables a wireless node to simultaneously transmit a signal and receive another on the same frequency band. Thus, IBFD wireless systems can theoretically provide up to twice the channel capacity compared to conventional Half-Duplex (HD) systems. In order to study the feasibility of IBFD networks, reliable models are needed to capture anticipated benefits of IBFD above the physical layer (PHY). In this paper, an accurate analytical model based on Discrete-Time Markov Chain (DTMC) analysis for IEEE 802.11 Distributed Coordination Function (DCF) with IBFD capabilities is proposed. The model captures all parameters necessary to calculate important performance metrics which quantify enhancements introduced as a result of IBFD solutions. Additionally, two frame aggregation schemes for Wireless Local Area Networks (WLANs) with IBFD features are proposed to increase the efficiency of data transmission. Matching analytical and simulation results with less than 1% average errors confirm that the proposed frame aggregation schemes further improve the overall throughput by up to 24% and reduce latency by up to 47% in practical IBFD-WLANs. More importantly, the results assert that IBFD transmission can only reduce latency to a suboptimal point in WLANs, but frame aggregation is necessary to minimize it. Finally, energy-efficiency is compared for both HD and IBFD networks. In comparison with the HD counterpart, IBFD systems can deliver superior energy efficiency for a given traffic scenario at the cost a higher power consumption.