Cost-Efficient Deployment of Relays for LTE-Advanced Cellular Networks

Relay is used in LTE-Advanced cellular networks to assist eNB(evolved Node Base-station) for coverage extension and throughput enhancement. Compared to eNB, relay is advantageous on both equipment cost and site cost. How to deploy relays to maximize the performance gain with a reasonable cost subjec...

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Bibliographic Details
Published in2011 IEEE International Conference on Communications (ICC) pp. 1 - 5
Main Authors Yijie Wang, Gang Feng, Yide Zhang
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.06.2011
Subjects
Analytical models
Downlink
Interference
Performance gain
Relays
Resource management
Throughput
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Summary:Relay is used in LTE-Advanced cellular networks to assist eNB(evolved Node Base-station) for coverage extension and throughput enhancement. Compared to eNB, relay is advantageous on both equipment cost and site cost. How to deploy relays to maximize the performance gain with a reasonable cost subject to a number of system constraints such as interference caused and backhaul subframe allocation is an important yet challenging issue. In this paper, we provide a solution for cost-efficient deployment of relays in LTE-A cellular networks. We establish a mathematical model to analyze the tradeoff between the deployment cost and the cell performance gain, and the tradeoff between overall cell performance and satisfaction level for individual users. Our interesting findings in this paper include: (1) the best cost-efficient number of relays in a cell is limited to a reasonable range between 7 and 11 for static relay deployment; (2) when progressive deployment is considered, the optimal number of relays decreases to 4 to achieve tradeoff gain between overall cell capacity and average user satisfaction level.
ISBN:9781612842325
1612842321
ISSN:1550-3607
DOI:10.1109/icc.2011.5962630