mMTC干扰消除的开槽ALOHA建模与性能分析

IF 4.5 3区计算机科学 Q1 COMPUTER SCIENCE, INFORMATION SYSTEMS

Computer Communications Pub Date : 2025-04-22 DOI:10.1016/j.comcom.2025.108177

Yuki Ichimura , Shigeo Shioda , Takeshi Hirai

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引用次数: 0

摘要

在假设基站和设备按照相互独立的平稳点过程分布的情况下，我们提出了一个分析模型来评估mMTC中带NOMA的开槽ALOHA的性能。对于NOMA，我们考虑一个简单的场景，在这个场景中，每个基站都可以进行完美的干扰消除。作为性能指标，我们关注设备成功向最近的基站传输数据的概率（传输成功概率）和基站可以正确解码信号的预期设备数量（基站吞吐量）。建立了简单开槽ALOHA、带干扰消除的开槽ALOHA和带功率控制的开槽ALOHA三种方案的两个性能指标的解析表达式。通过几个数值实验，我们表明，干扰消除的应用使吞吐量提高了20%；然而，干扰消除的应用并不能解决近距离问题。我们还表明，功率控制的应用解决了近距离问题，但显著降低了开槽ALOHA的性能。

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Modeling and performance analysis of slotted ALOHA with interference cancellation for mMTC

We propose an analytical model to evaluate the performance of slotted ALOHA with NOMA for mMTC under the assumption that base stations and devices are distributed according to mutually independent stationary point processes. For NOMA, we consider a simple scenario in which perfect interference cancellation can be conducted at each base station. As performance metrics, we focus on the probability of a device successfully transmitting data to the nearest base station (transmission success probability) and the expected number of devices from which a base station can correctly decode the signals (throughput of base station). We establish analytical expressions for the two performance metrics for three schemes: simple slotted ALOHA, slotted ALOHA with interference cancellation, and slotted ALOHA with power control. Through several numerical experiments, we show that the application of interference cancellation improves the throughput by up to 20%; however, the application of interference cancellation does not solve the near-far problem. We also show that the application of power control solves the near-far problem but significantly degrades the performance of slotted ALOHA.

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来源期刊

Computer Communications 工程技术-电信学

CiteScore

14.10

自引率

5.00%

发文量

397

审稿时长

66 days

期刊介绍： Computer and Communications networks are key infrastructures of the information society with high socio-economic value as they contribute to the correct operations of many critical services (from healthcare to finance and transportation). Internet is the core of today''s computer-communication infrastructures. This has transformed the Internet, from a robust network for data transfer between computers, to a global, content-rich, communication and information system where contents are increasingly generated by the users, and distributed according to human social relations. Next-generation network technologies, architectures and protocols are therefore required to overcome the limitations of the legacy Internet and add new capabilities and services. The future Internet should be ubiquitous, secure, resilient, and closer to human communication paradigms. Computer Communications is a peer-reviewed international journal that publishes high-quality scientific articles (both theory and practice) and survey papers covering all aspects of future computer communication networks (on all layers, except the physical layer), with a special attention to the evolution of the Internet architecture, protocols, services, and applications.