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首页> 外文期刊>IEEE Transactions on Information Theory >Optimal Rate Control for Delay-Constrained Data Transmission Over a Wireless Channel
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Optimal Rate Control for Delay-Constrained Data Transmission Over a Wireless Channel

机译：无线信道上受延迟约束的数据传输的最优速率控制

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摘要

We study energy-efficient transmission of data with deadline constraints over a time-varying channel. Specifically, the system model consists of a wireless transmitter with controllable transmission rate, time-varying and stochastic channel state, and strict delay constraints on the packets in the queue. While the transmitter can control the rate, the transmission power required depends on the chosen rate and the prevailing channel condition. The objective is to obtain a rate control policy that serves the data within the deadline constraints while minimizing the total energy expenditure. Toward this end, we first introduce the canonical problem of transmitting B units of data by deadline T over a Markov fading channel, and obtain the optimal policy for it using continuous-time stochastic control theory. Using a novel cumulative curves methodology and a decomposition approach, we extend the above setup to consider extensions involving variable deadlines on the packets. Finally, utilizing the analysis we present a heuristic policy for the case of arbitrary packet arrivals to the queue with individual deadline constraints, and give illustrative simulation results for its performance.
机译：我们研究时变通道上具有期限约束的节能传输。具体来说，系统模型由无线发射机组成，该无线发射机具有可控制的传输速率，时变和随机信道状态，并对队列中的数据包施加严格的延迟约束。虽然发射机可以控制速率，但是所需的发射功率取决于所选速率和主要信道条件。目的是获得一种速率控制策略，该策略可在截止期限约束内为数据提供服务，同时将总能源消耗降至最低。为此，我们首先介绍了在马尔可夫衰落信道上按截止时间T传输B单位数据的规范问题，并使用连续时间随机控制理论为其获取了最佳策略。使用新颖的累积曲线方法和分解方法，我们扩展了以上设置，以考虑涉及数据包可变期限的扩展。最后，利用分析结果，我们提出了一种针对任意数据包到达具有单独期限约束的队列的启发式策略，并给出了其性能的说明性仿真结果。

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