arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1709.03488cs.ITcs.NImath.IT
收藏

显式和隐式温度约束下的能量收集通信

Energy Harvesting Communications under Explicit and Implicit Temperature Constraints

Abdulrahman Baknina, Omur Ozel, Sennur Ulukus

摘要:

我们考虑一个能量收集通信系统,其中温度动态是由传输功率的政策。与以往的工作不同,我们考虑了一个离散时间系统,其中传输功率在每个时隙保持恒定。我们考虑两个模型,捕捉不同的温度效应。在第一个模型中,温度被约束为在所有时刻都低于临界温度;我们将此模型称为显式温度约束模型。我们调查吞吐量最佳功率分配多个能源抵达下一般,以及温度和能源有限的制度。我们表明,温度限制的情况下,最佳的功率分配是单调递减的。在第二个模型中,我们考虑了温度对信道质量的影响,通过其对加性噪声功率的影响,我们把这个模型称为隐式温度约束模型。在该模型中,由于先前的传输而导致的加性噪声的方差的变化是不可忽略的。特别地,发送的信号作为干扰贡献给所有后续时隙,从而影响信号与干扰加噪声比(SINR)。在这种情况下,我们调查吞吐量最优功率分配下,以及低和高信干噪比制度。我们表明,在低信干噪比制度的最佳分配指示发射机保存其收获的能量,直到最后一个时隙。在高信干噪比的制度,我们表明,最佳的功率序列是单调增加。最后,我们考虑的情况下,隐式和显式的温度约束是同时活跃的,我们在一定条件下,最优功率序列是单调递减的。

英文摘要:

We consider an energy harvesting communication system where the temperature dynamics is governed by the transmission power policy. Different from the previous work, we consider a discrete time system where transmission power is kept constant in each slot. We consider two models that capture different effects of temperature. In the first model, the temperature is constrained to be below a critical temperature at all time instants; we coin this model as explicit temperature constrained model. We investigate throughput optimal power allocation for multiple energy arrivals under general, as well as temperature and energy limited regimes. We show that the optimal power allocation for the temperature limited case is monotone decreasing. In the second model, we consider the effect of the temperature on the channel quality via its influence on additive noise power; we coin this model as implicit temperature constrained model. In this model, the change in the variance of the additive noise due to previous transmissions is non-negligible. In particular, transmitted signals contribute as interference for all subsequent slots and thus affect the signal to interference plus noise ratio (SINR). In this case, we investigate throughput optimal power allocation under general, as well as low and high SINR regimes. We show in the low SINR regime that the optimal allocation dictates the transmitter to save its harvested energy till the last slot. In the high SINR regime, we show that the optimal power sequence is monotone increasing. Finally, we consider the case in which implicit and explicit temperature constraints are simultaneously active and we show under certain conditions that the optimal power sequence is monotone decreasing.

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。

↑