ELI: Empowering LTE with Interference Awareness in Unlicensed Spectrum

2018 IEEE 26th International Conference on Network Protocols (ICNP) Pub Date : 2018-09-01 DOI:10.1109/ICNP.2018.00044

R. Sheshadri, K. Sundaresan, Eugene Chai, S. Rangarajan, Dimitrios Koutsonikolas

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引用次数: 3

Abstract

The advent of LTE into the unlicensed spectrum has necessitated the understanding of its operational efficiency when sharing spectrum with different radio access technologies. Our study reveals that LTE, owing to its inherent transmission characteristics, suffers significant performance degradation in the presence of interference caused by hidden terminals. This motivates the need for interference-awareness in LTE's channel access in unlicensed spectrum. To address this problem, we propose ELI. ELI's three-pronged solution equips the LTE base station with novel techniques to: (a) accurately detect and measure interference caused by hidden terminals, (b) collect interference statistics from clients across different channels with affordable overhead, and (c) leverage interference-awareness to improve its channel access performance. Our evaluations show that ELI can achieve 1.5-2x throughput gains over baseline schemes. Finally, ELI is LTE-LAA/MulteFire-standard compliant and can be deployed over the existing LTE-LAA implementation without any modifications.

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ELI:在未授权频谱中增强LTE干扰感知能力

LTE进入非授权频谱的出现，使得在与不同的无线电接入技术共享频谱时，有必要了解其操作效率。我们的研究表明，由于LTE固有的传输特性，在隐藏终端引起的干扰存在时，LTE的性能会显著下降。这激发了在未授权频谱的LTE信道访问中对干扰感知的需求。为了解决这个问题，我们提出ELI。ELI的三管齐下的解决方案为LTE基站配备了新颖的技术:(a)准确检测和测量隐藏终端引起的干扰，(b)以可承受的开销从不同信道的客户端收集干扰统计数据，以及(c)利用干扰感知来提高其信道访问性能。我们的评估表明，与基线方案相比，ELI可以实现1.5-2倍的吞吐量增益。最后，ELI符合LTE-LAA/ multifire标准，无需任何修改即可部署在现有的LTE-LAA实现上。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

2018 IEEE 26th International Conference on Network Protocols (ICNP)

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