Efficient Distributed MAC for Dynamic Demands: Congestion and Age Based Designs
Efficient Distributed MAC for Dynamic Demands: Congestion and Age Based Designs
复制标题
DOI：
10.1109/tnet.2022.3191607
复制
发表时间：
2023-02
期刊：
影响因子：
--
通讯作者：
Xujin Zhou;Irem Koprulu;A. Eryilmaz;M. Neely
中科院分区：
文献类型：
--
作者：
Xujin Zhou;Irem Koprulu;A. Eryilmaz;M. Neely
下一代无线技术预计将为日益密集和动态的用户群提供服务，这些用户会生成要在共享频谱上传输的短信息束。这就需要新的分布式、低开销的多址接入控制(MAC)策略来满足这种具有频谱效率特性的动态需求。在这项工作中，我们通过识别和开发两种根本不同的MAC范式来满足这一需求：(I)基于拥塞的范式，它估计系统中的拥塞水平并适应它；以及(Ii)基于年龄的范式，它根据需求的年龄确定需求的优先级。尽管它们有明显的差异，但我们在通用多信道接入场景中的每个范例下开发了策略，当它们使用任何渐近有效的信道编码/解码机制时，这些策略都可以证明是吞吐量最优的。我们还刻画了两种设计的稳定域，并研究了其中一种设计优于另一种设计的条件。我们进行了大量的仿真来验证理论声明，并研究了我们设计的非渐近性能。
Future generation wireless technologies are expected to serve an increasingly dense and dynamic population of users that generate short bundles of information to be transferred over the shared spectrum. This calls for new distributed and low-overhead Multiple-Access-Control (MAC) strategies to serve such dynamic demands with spectral efficiency characteristics. In this work, we address this need by identifying and developing two fundamentally different MAC paradigms: (i) congestion-based paradigm that estimates the congestion level in the system and adapts to it; and (ii) age-based paradigm that prioritizes demands based on their ages. Despite their apparent differences, we develop policies under each paradigm in a generic multi-channel access scenario that are provably throughput-optimal when they employ any asymptotically-efficient channel encoding/decoding mechanism. We also characterize the stability regions of the two designs, and investigate the conditions under which one design outperforms the other. We perform extensive simulations to validate the theoretical claims and investigate the non-asymptotic performances of our designs.