A calculus approach to minimum energy transmission policies with quality of service guarantees
A calculus approach to minimum energy transmission policies with quality of service guarantees
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DOI：
10.1109/infcom.2005.1497922
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发表时间：
2005-03
期刊：
影响因子：
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通讯作者：
M. Zafer;E. Modiano
中科院分区：
文献类型：
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作者：
M. Zafer;E. Modiano
我们考虑具有可控服务率的排队系统；例如，可以通过改变传输功率来控制速率的发射器。对于这样的系统，我们获得了满足服务质量（QoS）约束的最佳数据传输策略，并最大程度地减少了总传输能量消耗。首先，我们考虑已知到达的确定性案例，并使用到达和最小偏离曲线基于演算方法提出公式。提出问题作为连续的时间优化，并获得最佳解决方案，以进行一般到达曲线和QoS约束。在本文的后半部分，我们考虑了随机到达过程（泊松过程）和单个截止日期约束。目的是获得最小化预期能源支出的传输政策。该问题作为随机的最佳控制问题配方，并通过一些放松获得明确的解决方案。最后，提出了比较各种策略的模拟结果。
We consider a queueing system with controllable service rate; for example, a transmitter whose rate can be controlled by varying the transmission power. For such a system we obtain optimal data transmission policies that satisfy given quality of service (QoS) constraints and also minimize the total transmission energy expenditure. First, we consider the deterministic case of known arrivals and present a formulation based on a calculus approach using arrival and minimum departure curves. The problem is posed as a continuous time optimization and an optimal solution is obtained for general arrival curves and QoS constraints. In the latter half of the paper, we consider a stochastic arrival process (Poisson process) and a single deadline constraint. The objective is to obtain a transmission policy that minimizes the expected energy expenditure. The problem is formulated as a stochastic optimal control problem and an explicit solution is obtained with some relaxation. Finally, simulation results comparing various policies are presented.