Why to Decouple the Uplink and Downlink in Cellular Networks and How To Do It

被引：155

作者：

Boccardi, Federico ^{[1
,2
]}

Andrews, Jeffrey ^{[2
]}

Elshaer, Hisham ^{[3
,4
]}

Dohler, Mischa ^{[5
]}

Parkvall, Stefan ^{[6
,7
]}

Popovski, Petar ^{[8
]}

Singh, Sarabjot ^{[9
]}

机构：

[1] Bell Labs Alcatel Lucent, Bengaluru, India

[2] Univ Texas Austin, Elect & Commun Engn, Austin, TX 78712 USA

[3] Ericsson R&D, Stockholm, Sweden

[4] Vodafone R&D United Kingdom, EU Crossfire Project, Technol 5G, London, England

[5] Kings Coll London, Wireless Commun, London WC2R 2LS, England

[6] KTH, Commun Theory, Zurich, Switzerland

[7] Univ Calif San Diego, San Diego, CA 92103 USA

[8] Aalborg Univ, Aalborg, Denmark

[9] Intel Corp, Santa Clara, CA USA

来源：

IEEE COMMUNICATIONS MAGAZINE | 2016年 / 54卷 / 03期

关键词：

LTE; 5G;

D O I：

10.1109/MCOM.2016.7432156

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Ever since the inception of mobile telephony, the downlink and uplink of cellular networks have been coupled, that is, mobile terminals have been constrained to associate with the same base station in both the downlink and uplink directions. New trends in network densification and mobile data usage increase the drawbacks of this constraint, and suggest that it should be revisited. In this article we identify and explain five key arguments in favor of downlink/uplink decoupling based on a blend of theoretical, experimental, and architectural insights. We then overview the changes needed in current LTE-A mobile systems to enable this decoupling, and then look ahead to fifth generation cellular standards. We demonstrate that decoupling can lead to significant gains in network throughput, outage, and power consumption at a much lower cost compared to other solutions that provide comparable or lower gains.

引用

页码：110 / 117

页数：8

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