With the advancement of technologies like Industry 4.0, communication networks must meet stringent requirements of applications demanding deterministic and bounded latencies. The problem is further compounded by the need to periodically synchronize network devices to a common time reference to address clock drifts. Existing solutions often simplify the problem by assuming either perfect synchronization or a worst-case error. Additionally, these approaches delay the scheduling process in network devices until the scheduled frame is guaranteed to have arrived in the device queue, inducing additional delays to the stream. A novel approach that completely avoids queuing delays is proposed, enabling it to meet even the strictest deadline requirement. Furthermore, both approaches can be enhanced by incorporating network-derived time-synchronization information. This is not only convenient for meeting deadline requirements but also improves bandwidth efficiency.

翻译：随着工业4.0等技术的发展，通信网络必须满足对确定性和有界延迟要求严格的应用需求。由于需要定期将网络设备同步到公共时间基准以解决时钟漂移问题，该问题进一步复杂化。现有解决方案通常通过假设完美同步或最坏情况误差来简化问题。此外，这些方法会延迟网络设备中的调度过程，直到确保预定帧已到达设备队列，从而给数据流带来额外延迟。本文提出了一种完全避免排队延迟的新方法，使其能够满足最严格的截止时间要求。此外，两种方法均可通过整合网络衍生的时间同步信息得到增强。这不仅便于满足截止时间要求，还能提高带宽利用效率。