Licensed-Assisted Access LTE: coexistence with IEEE 802.11 and the evolution toward 5G
Licensed-Assisted Access LTE: coexistence with IEEE 802.11 and the evolution toward 5G
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DOI：
10.1109/mcom.2016.7497766
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发表时间：
2016-06
影响因子：
11.2
通讯作者：
A. Mukherjee;Jung-Fu Cheng;Sorour Falahati;H. Koorapaty;D. Kang;Reem Karaki;L. Falconetti;Daniel Larsson
中科院分区：
文献类型：
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作者：
A. Mukherjee;Jung-Fu Cheng;Sorour Falahati;H. Koorapaty;D. Kang;Reem Karaki;L. Falconetti;Daniel Larsson
LAA是LTE在未授权频谱中的新操作模式，其将在LTE版本13中呈现。在LAA下，授权载波将与未授权载波聚合，以便在仍然提供无缝移动性支持的同时适时地增强下行链路用户吞吐量。为了与WiFi共存，LAA LTE所需的一些新功能包括用于基于通话前监听的信道感测的机制、具有有限最大传输持续时间的载波上的不连续传输以及跨多个未授权信道的多载波传输。本文详细概述了LAA的设计协议、非授权频谱运营对LTE物理层架构的影响以及LTE Release 13以外的其他增强功能的范围。针对室内和多载波场景的一系列模拟表明，可以实现LAA和WiFi之间的公平共存，并且LAA的部署可以提高WiFi性能。
LAA is a new operation mode of LTE in the unlicensed spectrum, which will be featured in LTE Release 13. Under LAA, licensed carriers will be aggregated with unlicensed carriers in order to opportunistically enhance downlink user throughput while still offering seamless mobility support. In order to coexist with WiFi, some of the new functionalities required of LAA LTE include a mechanism for channel sensing based on listen-before-talk, discontinuous transmission on a carrier with limited maximum transmission duration, and multicarrier transmission across multiple unlicensed channels. This article presents a detailed overview of the design agreements for LAA, the impact of unlicensed spectrum operation on the LTE physical layer architecture, and the scope of additional enhancements beyond LTE Release 13. A range of simulations for indoor and multicarrier scenarios show that fair coexistence between LAA and WiFi can be achieved, and that deployment of LAA can provide a boost in WiFi performance.