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arXiv 2201.05066cs.NI
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RAPID:使用上下文ID的基于竞争解决的随机接入,用于IoT

RAPID: Contention Resolution-based Random Access using Context ID for IoT

Junseok Kim, Seongwon Kim, T. Taleb, Sunghyun Choi

摘要:

随着物联网(IoT)设备数量的增加,机器类型通信(MTC)已经成为第五代(5G)通信系统的重要用例。由于MTC设备大多数与基站(BS)断开连接以节省功率,因此设备需要随机接入过程来发送数据。如果许多设备同时尝试随机接入,则会发生前导码冲突问题,从而导致延迟增加。在延迟敏感设备和延迟容忍设备共存的环境中,基于竞争的随机接入过程不能满足延迟敏感设备的延迟要求。因此,我们提出了RAPID,一种新的随机接入过程,这是通过两个消息交换的延迟敏感的设备完成。我们还开发了接入模式分析器(APA),估计MTC设备的流量特性。当执行RAPID和基于竞争的随机接入的UE共存时,重要的是确定作为RAPID的可验证码的数量的值以减少随机接入负载。因此,我们使用马尔可夫链模型来分析随机访问负载,以获得RAPID的最佳可行数。仿真结果表明,RAPID实现了99.999%的可靠性与80.8%的上行链路延迟缩短,也减少了30.5%的随机接入负载相比,最先进的技术。

英文摘要:

With the increasing number of Internet of Things (IoT) devices, Machine Type Communication (MTC) has become an important use case of the Fifth Generation (5G) communication systems. Since MTC devices are mostly disconnected from Base Station (BS) for power saving, random access procedure is required for devices to transmit data. If many devices try random access simultaneously, preamble collision problem occurs, thus causing latency increase. In an environment where delay-sensitive and delay-tolerant devices coexist, the contention-based random access procedure cannot satisfy latency requirements of delay-sensitive devices. Therefore, we propose RAPID, a novel random access procedure, which is completed through two message exchanges for the delay-sensitive devices. We also develop Access Pattern Analyzer (APA), which estimates traffic characteristics of MTC devices. When UEs, performing RAPID and contention-based random access, coexist, it is important to determine a value which is the number of preambles for RAPID to reduce random access load. Thus, we analyze random access load using a Markov chain model to obtain the optimal number of preambles for RAPID. Simulation results show RAPID achieves 99.999% reliability with 80.8% shorter uplink latency, and also decreases random access load by 30.5% compared with state-of-the-art techniques.

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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