论文标题
为超级可靠和低延迟通信的半确定性流量配置了赠款
Configured Grant for Semi-Deterministic Traffic for Ultra-Reliable and Low Latency Communications
论文作者
论文摘要
基于赠款的配置分配已在新的第三代伙伴关系项目版本16中采用。该方案有利于支持超可靠和低延迟通信的工业通信，这是一个关键的第五代移动通信使用情况。这种调度机制使使用定期流量的用户可以轻松传输其数据，并绕过需要进行调度请求和调度赠款的信号；并提供低延迟访问。为了促进超级可靠的通信，调度机制可以使用户在预定的时期内连续重复的情况下传输冗余传输。但是，对于具有半准则流量的用户，基于赠款的分配的可靠性和延迟性能会恶化。这可能是由于延迟数据到达缓冲区的原因，并且用户无法传输其重复，从而导致可靠性降解。为了通过半确定性流量提高配置的赠款可靠性绩效，我们考虑使用各种分配设计，例如，在配置的赠款期内额外的无牌频谱或灵活的传输，或者允许重复之间的时间间隔等。这些增强功能可能是第六代配置的赠款模型的阶梯延期。
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.
