Joint Spectrum Sharing and ABS Adaptation for Network Virtualization in Heterogeneous Cellular Networks
Joint Spectrum Sharing and ABS Adaptation for Network Virtualization in Heterogeneous Cellular Networks
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DOI：
10.1109/glocom.2014.7417165
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发表时间：
2014-12
期刊：
影响因子：
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通讯作者：
Hao Zhou;Yusheng Ji;Xiaoyan Wang;S. Yamada
中科院分区：
文献类型：
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作者：
Hao Zhou;Yusheng Ji;Xiaoyan Wang;S. Yamada
网络虚拟化（Network virtualization， NV）是一种很有前景的解决方案，可以提高资源利用率、改善系统性能、降低网络运营商的投资。频谱共享是无线网络中NV的一个重要问题。同时，几乎空白子帧（ABS）方案对异构蜂窝网络（HetNet）中的NV提出了新的挑战。本文研究了频谱共享与ABS自适应的联合优化问题，并通过逻辑虚拟运营商（LVOs）的通用效用函数来表示优化目标。我们将问题公式化，并将其解耦成两个子问题。提出了一种基于动态规划的频谱共享子问题算法和一种基于交替方向乘法器（ADMM）的ABS自适应子问题算法。仿真结果验证了该算法的有效性。
Network virtualization (NV) is a promising solution for higher resource utilization, improved system performance, and lower investment capitals for network operators. Spectrum sharing is an important issue for NV in the wireless networks. Meanwhile, the scheme of Almost Blank Subframe (ABS) causes new challenge for NV in the heterogeneous cellular networks (HetNet). This paper aims at investigating the joint optimization problem of spectrum sharing and ABS adaptation, and the optimization target is represented through general utility functions of logical virtual operators (LVOs). We formulate the problem, and decouple it into two subproblems. We propose a dynamic programming based algorithm for the spectrum sharing subproblem, and an alternating direction method of multipliers (ADMM) based algorithm for the ABS adaptation subproblem. The simulation results demonstrate the efficiency of the proposed algorithm.