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arXiv 1405.4487cs.ITmath.IT
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在延迟受限的应用卸载中优化无线电和计算资源以提高能效

Optimization of Radio and Computational Resources for Energy Efficiency in Latency-Constrained Application Offloading

Olga Muñoz, Antonio Pascual-Iserte, Josep Vidal

摘要:

提供具有计算能力的毫微微接入点(FAP)将允许(全部或部分)将高度要求的应用从智能手机卸载到所谓的毫微微云。这样的卸载在移动终端(MT)处的电池节省和/或应用执行中的延迟减少方面是有益的,只要通信过程所需的能量和/或时间被FAP处的远程计算所产生的能量和/或时间节省所补偿。对于这个问题,我们在本文中提供了一个框架的无线电和计算资源的使用,利用能源消耗和延迟之间的权衡,并假设多个天线在MT和服务FAP的联合优化。作为优化的结果,最优通信策略(例如,传输功率、速率、预编码器),以及计算负载在手持机和服务FAP之间的最优分布。本文还建立了条件下,总或没有卸载是最佳的,确定这是最低的可负担的延迟在执行的应用程序,并分析作为一个特殊的情况下,最小化的总消耗的能量没有延迟的限制。

英文摘要:

Providing femto-access points (FAPs) with computational capabilities will allow (either total or partial) offloading of highly demanding applications from smart-phones to the so called femto-cloud. Such offloading promises to be beneficial in terms of battery saving at the mobile terminal (MT) and/or latency reduction in the execution of applications, whenever the energy and/or time required for the communication process are compensated by the energy and/or time savings that result from the remote computation at the FAPs. For this problem, we provide in this paper a framework for the joint optimization of the radio and computational resource usage exploiting the tradeoff between energy consumption and latency, and assuming that multiple antennas are available at the MT and the serving FAP. As a result of the optimization, the optimal communication strategy (e.g., transmission power, rate, precoder) is obtained, as well as the optimal distribution of the computational load between the handset and the serving FAP. The paper also establishes the conditions under which total or no offloading are optimal, determines which is the minimum affordable latency in the execution of the application, and analyzes as a particular case the minimization of the total consumed energy without latency constraints.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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