arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2203.08508cs.ITcs.NImath.IT
收藏

状态更新系统中的语义感知信源编码

Semantics-Aware Source Coding in Status Update Systems

Pouya Agheli, Nikolaos Pappas, Marios Kountouris

摘要:

我们考虑一个通信系统,其中的目的地接收状态更新的信息源,观察一个物理过程。发射机执行语义授权的过滤,作为一种手段,以及时的方式只发送最“重要”的样本到接收机。作为第一步,我们探索一个简单的政策,发射机选择只编码一小部分的最不频繁的实现所观察到的随机现象,对待其余的不提供信息。对于这个及时的信源编码问题,我们推导出最佳的码字长度的意义上最大化的语义感知效用函数和最小化的二次平均长度成本。我们的数值计算结果显示了不同的到达率和编码成本的最佳数量的更新传输,并证实语义过滤导致更高的性能,及时提供重要的更新。

英文摘要:

We consider a communication system in which the destination receives status updates from an information source that observes a physical process. The transmitter performs semantics-empowered filtering as a means to send only the most "important" samples to the receiver in a timely manner. As a first step, we explore a simple policy where the transmitter selects to encode only a fraction of the least frequent realizations of the observed random phenomenon, treating the remaining ones as not informative. For this timely source coding problem, we derive the optimal codeword lengths in the sense of maximizing a semantics-aware utility function and minimizing a quadratic average length cost. Our numerical results show the optimal number of updates to transmit for different arrival rates and encoding costs and corroborate that semantic filtering results in higher performance in terms of timely delivery of important updates.

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。

↑