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Configured Grant for Semi-Deterministic Traffic for Ultra-Reliable and Low Latency Communications
arXiv - CS - Networking and Internet Architecture Pub Date : 2020-09-10 , DOI: arxiv-2009.04635
Bikramjit Singh and Majid Gerami

Configured Grant-based allocation has been adopted in New Radio 3rd Generation Partnership Project Release 16. This scheme is beneficial in supporting Ultra-Reliable and Low Latency Communication for industrial communication, a key Fifth Generation mobile communication usage scenario. This scheduling mechanism enables a user with a periodic traffic to transmit its data readily and bypasses the signaling entailed to scheduling requests and scheduling grants; and provides low latency access. To facilitate ultra-reliable communication, the scheduling mechanism can allow the user to transmit redundant transmissions at consecutive repetition occasions in a pre-defined period. However, for the user with semi-deterministic traffic, the reliability and latency performance with Configured Grant-based allocation deteriorates. This can be due to, e.g., late data arrival in the buffer, and the user unable to transmit its repetitions, which leads to reliability degradation. To improve the Configured Grant reliability performance with semi-deterministic traffic, we consider various allocation designs utilizing, e.g., additional unlicensed spectrum, or flexible transmission in a Configured Grant period, or allowing time-gaps between the repetitions, etc. These enhancements could be a stepping-stone for Sixth Generation Configured Grant models.

中文翻译:

为超可靠和低延迟通信的半确定性流量配置授权

New Radio 3rd Generation Partnership Project Release 16采用了基于配置的授权分配。该方案有利于支持工业通信的超可靠和低延迟通信,这是第五代移动通信的关键使用场景。这种调度机制使具有周期性流量的用户能够轻松地传输其数据,并绕过调度请求和调度授权所需的信令;并提供低延迟访问。为了促进超可靠通信,调度机制可以允许用户在预定义的时间段内在连续的重复时机发送冗余传输。但是,对于具有半确定性流量的用户,基于配置授权的分配的可靠性和延迟性能会恶化。这可能是由于,例如,数据到达缓冲区延迟,用户无法重复发送,导致可靠性下降。为了提高半确定性流量的配置授权可靠性性能,我们考虑各种分配设计,例如,使用额外的未授权频谱,或在配置授权期间灵活传输,或允许重复之间的时间间隔等。这些增强可以是第六代配置授予模型的垫脚石。
更新日期:2020-09-11
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