论文标题
在MTC中进行两步随机访问的快速重审
On Fast Retrial for Two-Step Random Access in MTC
论文作者
论文摘要
在机器类型通信（MTC）中，一组设备或传感器可能需要发送其数据包，并具有一定的访问延迟限制，以进行延迟敏感的应用程序或实时范围的应用程序（IOT）应用程序。在这种情况下，两步随机访问方法将比针对蜂窝系统中大多数MTC标准使用的4步随机访问方法可取。尽管两步方法在访问延迟方面效率很高，但它们的访问延迟仍取决于重传策略。因此，对于较低的访问延迟，可以将立即重新递送的快速重试作为重新传输策略。在本文中，我们研究了2步随机访问方法，快速重试作为一种缓冲的多通道Aloha，并得出了一种分析方法，以获取服务质量（QOS）指数以分配队列长度的分布，以便可以在访问延迟方面确定关键参数可以满足QoS要求。仿真结果证实了派生的分析方法可以提供QoS指数的良好近似值。
In machine-type communication (MTC), a group of devices or sensors may need to send their data packets with certain access delay limits for delay-sensitive applications or real-time Internet-of-Things (IoT) applications. In this case, 2-step random access approaches would be preferable to 4-step random access approaches that are employed for most MTC standards in cellular systems. While 2-step approaches are efficient in terms of access delay, their access delay is still dependent on retransmission strategies. Thus, for a low access delay, fast retrial that allows immediate re-transmissions can be employed as a re-transmission strategy. In this paper, we study 2-step random access approaches with fast retrial as a buffered multichannel ALOHA with fast retrial, and derive an analytical way to obtain the quality-of-service (QoS) exponent for the distribution of queue length so that key parameters can be decided to meet QoS requirements in terms of access delay. Simulation results confirm that the derived analytical approach can provide a good approximation of QoS exponent.
