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arXiv 1003.0054cs.NI
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无线传感器网络能量优化传输调度

Energy Optimal Transmission Scheduling in Wireless Sensor Networks

Rahul Srivastava, Can Emre Koksal

摘要:

传感器网络设计中的主要问题之一是时间关键数据的能量有效通信。由于信道动态和干扰,每个节点处的失败分组传输尝试可能导致能量浪费。因此,不知道信道动态的传输控制技术可能导致次优的信道使用模式。在本文中,我们提出了一种传输控制器,利用不同的“等级”的信道侧信息,以最佳的方式调度数据包传输,同时满足最后期限约束的所有数据包在传输队列中等待。无线信道被建模为有限状态马尔可夫信道。我们特别感兴趣的情况下,发射机具有低等级的信道侧信息,可以获得单独的基础上的ACK/NAK序列为先前的传输。我们的调度程序是容易实现的,它是基于动态规划解决方案的有限时域传输控制问题。我们还计算了有限状态马尔可夫信道的信息理论容量的反馈包含不同等级的信道侧信息,包括,通过ACK/NAK序列获得。我们说明,我们的调度程序实现了给定的吞吐量在一个功率水平,这是相当接近的基本限制,可实现的通道。

英文摘要:

One of the main issues in the design of sensor networks is energy efficient communication of time-critical data. Energy wastage can be caused by failed packet transmission attempts at each node due to channel dynamics and interference. Therefore transmission control techniques that are unaware of the channel dynamics can lead to suboptimal channel use patterns. In this paper we propose a transmission controller that utilizes different "grades" of channel side information to schedule packet transmissions in an optimal way, while meeting a deadline constraint for all packets waiting in the transmission queue. The wireless channel is modeled as a finite-state Markov channel. We are specifically interested in the case where the transmitter has low-grade channel side information that can be obtained based solely on the ACK/NAK sequence for the previous transmissions. Our scheduler is readily implementable and it is based on the dynamic programming solution to the finite-horizon transmission control problem. We also calculate the information theoretic capacity of the finite state Markov channel with feedback containing different grades of channel side information including that, obtained through the ACK/NAK sequence. We illustrate that our scheduler achieves a given throughput at a power level that is fairly close to the fundamental limit achievable over the channel.

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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