Resource reservation is a fundamental mechanism for ensuring quality of service in time-sensitive networks, which can be decentralized by using reservation protocols. In the Ethernet technology Time-Sensitive Networking, this has been proposed in conjunction with the Credit-Based Shaper. For the reservation, the standards assume a maximum worst-case latency bound at each hop. However, we will show through formal analysis and simulation that these worst-case latency bounds are not safe. To face this, we propose an extension to the current standards to allow the reservation of time-sensitive traffic with reliable latency guarantees. The effectiveness of our approach is demonstrated through simulations of both synthetic and industrial networks. Finally, by providing additional information about neighboring devices, we could further increase the maximum reservable traffic by up to 20% in our test cases.

翻译：资源预留是时间敏感网络中确保服务质量的基本机制，可通过预留协议实现去中心化。在以太网技术——时间敏感网络中，该机制与基于信用整形器相结合被提出。针对资源预留，相关标准假设每个跳数具有最大最坏情况延迟边界。然而，我们将通过形式化分析与仿真证明这些最坏情况延迟边界并不安全。为此，我们提出对现有标准的扩展方案，以支持具有可靠延迟保证的时间敏感流量预留。通过合成网络与工业网络的仿真实验，验证了该方法的有效性。最终，通过提供相邻设备的额外信息，我们的测试案例中最大可预留流量可进一步提升20%。