An Elastic Sub-carrier and Power Allocation Algorithm Enabling Wireless Network Virtualization

An Elastic Sub-carrier and Power Allocation Algorithm Enabling Wireless Network Virtualization
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一种支持无线网络虚拟化的弹性子载波和功率分配算法

DOI:
10.1007/s11277-013-1439-7
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发表时间:
2013-10
影响因子:
2.2
通讯作者:
Zhang Hailin
Zhang Hailin
中科院分区:
计算机科学4区
文献类型:
--
作者:
Lu Xiaofeng;Yang Kun;Zhang Hailin

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无线移动网络虚拟化使物理移动网络运营商 (PMNO) 能够将其网络资源划分为更小的切片,并将每个切片分配给单独的虚拟移动网络运营商,然后以更加动态和更具成本效益的方式管理这些虚拟网络。 PMNO如何在保证资源弹性的同时将资源分配给各个切片是一个关键问题。本文提出了一种网络虚拟化场景中的资源分配算法,其中考虑的资源包括子载波和传输功率。整体算法主要包括以下两个过程:首先将物理无线网络虚拟成多个切片,每个切片代表一个虚拟网络,在虚拟化过程中根据流量负载和信道状态信息对资源进行弹性分配。其次,在每个虚拟网络(或切片)内进行物理资源分配。特别是本文采用正交频分复用作为其物理层,以实现更有效的资源利用。提出了一种多步动态优化方法,以使用二进制整数规划实现子载波分配和使用非线性规划实现功率分配。目的是实现以下设计目标:虚拟网络隔离和资源效率。仿真结果表明,达到了上述目标。
Wireless mobile network virtualization enables physical mobile network operators (PMNO) to partition their network resources into smaller slices and assign each slice to an individual virtual mobile network operator and then manages these virtual networks in a more dynamic and cost-effective fashion. How a PMNO allocates resources to individual slices while ensuring resource elasticity is a key issue. This paper presents a resource allocation algorithm in such a network virtualization scenario where resource considered here includes both sub-carriers and transmission power. The overall algorithm involves the following two major processes: firstly to virtualize a physical wireless network into multiple slices each representing a virtual network, where resources are allocated elastically based on traffic loads and channel state information during virtualization; secondly, to carry out physical resource allocation within each virtual network (or slice). In particular the paper adopts orthogonal frequency division multiplexing as its physical layer to achieve more efficient resource utilization. A multi-step dynamic optimization approach is proposed to achieve sub-carrier allocation using binary integer programming and power allocation using nonlinear programming. The aim is to achieve the following design goals: virtual network isolation, and resource efficiency. The simulation results show that the above goals have been achieved.
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