多信道衰落通信链路qos驱动的节能功率自适应

S. Khakurel, T. Le-Ngoc, Leila Musavian
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引用次数: 2

摘要

本文在对延迟敏感业务的最小有效容量(EC)进行约束的情况下,对同时传输数据的多通道衰落通信链路的参数化能源效率(EEP)进行了最大化。EEP,单位为b/s/Hz,定义为频谱效率(SE)与发射功率之间的差值,该差值由一个参数缩放,该参数表示发射功率的惩罚。给出了该问题的最优功率自适应策略,该策略在可行的情况下由全局最优值给出,或者由目标函数与约束相交的边界点给出。此外,我们将总发射功率分配为延迟敏感功率和延迟不敏感功率,前者是满足EC约束所需的最小功率,后者是最大化链路EEP所需的剩余功率。仿真结果表明,延迟敏感功率是最小电导率的指数增长函数,而延迟不敏感功率随着最小电导率的增大而衰减为零。随着系统中子信道数量的增加,延迟不敏感功率呈指数增长,而延迟敏感功率呈指数下降。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
QoS-driven energy-efficient power adaptation in a multi-channel fading communication link
In this paper, we maximize the parameterized energy efficiency (EEP) of a multi-channel fading communication link that simultaneously transmits data corresponding to delay-sensitive and delay-insensitive applications subject to a constraint on the minimum effective capacity (EC) of delay-sensitive traffic. EEP, in b/s/Hz, is defined as the difference between the spectral efficiency (SE) and the transmit power scaled by a parameter which represents the penalty on the transmit power. We provide an optimal power adaptation policy to this problem which is either given by the global optimum, if feasible, or given by the boundary point where the objective function intersects the constraint. Further, we apportion the total transmit power into delay-sensitive power, which is the minimum power required to meet the EC constraint and delay-insensitive power, which is the residual power used to maximize the EEP of the link. Simulation results show that delay-sensitive power is an exponentially increasing function of minimum EC while delay-insensitive power decays to zero for higher values of minimum EC. Further, delay-insensitive power increases while delay-sensitive power exponentially decreases with number of subchannels in the system.
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