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arXiv 2507.05042cs.ITcs.NImath.IT
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有限状态马尔可夫信道的年龄感知CSI获取

Age-Aware CSI Acquisition of a Finite-State Markovian Channel

Onur Ayan, Jiping Luo, Xueli An, Nikolaos Pappas

AI总结:

本文研究部分可观测无线系统中信息年龄与信道估计的权衡问题,将有限状态马尔可夫信道下的调度优化建模为POMDP,并通过相对值迭代算法求得考虑CSI老化的最优数据传输策略。

摘要:

信息年龄(AoI)已成为量化信息新鲜度的关键指标;然而,在部分可观测无线系统中,其与信道估计之间的相互作用仍未得到充分探索。本文考虑一个发射机-接收机对在具有时变可靠性水平的不可靠信道上进行通信。发射机通过信道状态信息获取过程观测瞬时链路可靠性,在此过程中数据传输被中断。这导致了在利用有限网络资源进行数据传输或信道状态信息获取以对抗信道老化效应之间的根本性权衡。假设无线信道被建模为有限状态马尔可夫信道,我们将优化问题表述为部分可观测马尔可夫决策过程(POMDP),通过相对值迭代算法获得最优策略,并通过仿真证明了所提方案的有效性。据我们所知,这是首个在考虑信道状态信息老化影响的同时,旨在为数据传输寻求最优调度策略的工作。

英文摘要:

The Age of Information (AoI) has emerged as a critical metric for quantifying information freshness; however, its interplay with channel estimation in partially observable wireless systems remains underexplored. This work considers a transmitter-receiver pair communicating over an unreliable channel with time-varying reliability levels. The transmitter observes the instantaneous link reliability through a channel state information acquisition procedure, during which the data transmission is interrupted. This leads to a fundamental trade-off between utilizing limited network resources for either data transmission or channel state information acquisition to combat the channel aging effect. Assuming the wireless channel is modeled as a finite-state Markovian channel, we formulate an optimization problem as a partially observable Markov decision process (POMDP), obtain the optimal policy through the relative value iteration algorithm, and demonstrate the efficiency of our solution through simulations. To the best of our knowledge, this is the first work to aim for an optimal scheduling policy for data transmissions while considering the effect of channel state information aging.

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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