Capacity and Delay Tradeoff of Secondary Cellular Networks With Spectrum Aggregation
Capacity and Delay Tradeoff of Secondary Cellular Networks With Spectrum Aggregation
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DOI：
10.1109/twc.2018.2818730
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发表时间：
2016-12
影响因子：
10.4
通讯作者：
Lingyu Chen;Chen Liu;Xuemin Hong;Chengxiang Wang;J. Thompson;Jianghong Shi
中科院分区：
文献类型：
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作者：
Lingyu Chen;Chen Liu;Xuemin Hong;Chengxiang Wang;J. Thompson;Jianghong Shi
蜂窝通信网络受到冗余容量的困扰，这导致网络资本投资的低利用率和成本效益。可以利用冗余容量来提供超弹性和延迟容忍的辅助流量。在本文中，我们提出了一个分析框架，研究容量延迟权衡的弹性/二级业务在大规模蜂窝网络与频谱聚合。我们的框架集成了随机几何和混沌理论模型，并给出了分析见解的容量延迟性能的干扰限制制度。封闭形式的结果得到表征的平均延迟和延迟分布的功能，每个用户的吞吐量。频谱聚合，用户和基站密度，流量会话有效载荷，和主要的流量动态的容量延迟权衡关系的影响进行了研究。导出了基本容量极限，揭示了其标度行为。我们的分析表明，通过蜂窝网络提供二次通信服务的可行性，并强调了一些关键的设计问题。
Cellular communication networks are plagued with redundant capacity, which results in low utilization and cost-effectiveness of network capital investments. The redundant capacity can be exploited to deliver secondary traffic that is ultra-elastic and delay-tolerant. In this paper, we propose an analytical framework to study the capacity-delay tradeoff of elastic/secondary traffic in large scale cellular networks with spectrum aggregation. Our framework integrates stochastic geometry and queueing theory models and gives analytical insights into the capacity-delay performance in the interference limited regime. Closed-form results are obtained to characterize the mean delay and delay distribution as functions of per user throughput capacity. The impacts of spectrum aggregation, user and base station densities, traffic session payload, and primary traffic dynamics on the capacity-delay tradeoff relationship are investigated. The fundamental capacity limit is derived and its scaling behavior is revealed. Our analysis shows the feasibility of providing secondary communication services over cellular networks and highlights some critical design issues.