面向移动云计算接入网络的高能效无线资源管理

doi:10.3969/j.issn.1000-0801.2014.07.09

摘要/Abstract

摘要：

摘要：双层宏蜂窝/小蜂窝异构网络不但能解决室内用户的覆盖问题，还可以大幅度降低网络能量消耗。但是，网络中的跨层和层间干扰会降低网络性能，高能效的无线资源分配和优化方法无疑将成为解决此问题的有效途径。首先，给出了一个移动云计算管理框架。然后，针对无线单链路定义了空间传输效率，比较和分析了多种单链路效率度量的含义和数学性质，并针对基于LTE-A（long term evolution-advanced）的移动云计算接入网络，提出了一种高能效的无线资源管理算法。为了快速地达到最优解，设计了一个快速收敛的迭代算法。仿真分析说明此资源管理算法实现了移动云计算系统能量效率和吞吐量的高效折中。

关键词: 移动云计算, 双层宏蜂窝/小蜂窝网络, 绿色无线通信, 无线资源分配方法, LTE-A

Abstract:

Two-tier macro-femto-cellular networks have initially been proposed as a solution to the poor indoor coverage problem, but they are also capable of substantially reducing the overall energy consumption. However, the cross-tier and co-tier interference have to be carefully controlled with the aid of specific radio resource allocation and optimization techniques. A mobile cloud computing management architecture was proposed firstly. Then novel concept of spatial transmission efficiency for PtP radio link was first introduced with several existing efficiency metrics compared. An analytical model was conceived and a radio resource management algorithm based on LTE-A mobile cloud computing was designed. In order to achieve the optimal solution quickly, a rapid convergence of the iterative algorithm was designed. Simulation result shows the proposed algorithm achieves the maximum of system energy efficiency with a superior tradeoff with system throughput.

Key words: mobile cloud computing, two-tier macro-femto-cellular network, green wireless communication, radio resource allocation, LTE-A

赵国刚,赵力强,杨鲲. 面向移动云计算接入网络的高能效无线资源管理[J]. 电信科学, 2014, 30(7): 53-61.

Guogang Zhao,Liqiang Zhao,Kun Yang. Energy Efficient Radio Resource Allocation in Two-Tier Macro-Femto Cellular for Mobile Cloud Computing[J]. Telecommunications Science, 2014, 30(7): 53-61.

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参考文献 13

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无线资源分配算法	特点
最大载干比分配算法	目标是最大化系统吞吐量
最大最小值分配算法和轮询算法	两者都可以在不顾及用户信道状态的前提下提高用户之间的公平性。最大最小值分配算法通过最大化用户的最小数据速率保证所有用户拥有相同的速率
比例公平算法	比例公平算法会给优先级高的用户分配更多的子信道，其中用户的优先级会随着增加的平均吞吐量而降低
能量消耗比例（energy consumption ratio,ECR）	为了最大化系统的能量效率，效用函数被定义为单位有效系统吞吐量所消耗的能量^[7]
基于议价的高效功率控制（efficient power control via pricing）	用户的效用是能量效率和单位带宽议价结果的函数。此效用被证实是协作传输博弈的纳什均衡解^[7]

参数	值
载波频率	2.0 GHz
宏蜂窝／小蜂窝覆盖半径	500 m,50 m
宏基站最大发射功率	46 dBm
小基站最大发射功率	20 dBm
宏蜂窝覆盖下小蜂窝数量，宏蜂窝数量	50个，7个
系统带宽	20 MHz

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