An (m,k)-firm Elevation Policy to Increase the Robustness of Time-Driven Schedules in 5G Time-Sensitive Networks
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| Main Authors: | , , , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866913988482170880 |
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| author | Egger, Simon Laidig, Robin Geppert, Heiko Haug, Lucas Herrmann, Jona Dürr, Frank Becker, Christian |
| author_facet | Egger, Simon Laidig, Robin Geppert, Heiko Haug, Lucas Herrmann, Jona Dürr, Frank Becker, Christian |
| contents | Current standardization efforts are advancing the integration of 5G and Time-Sensitive Networking (TSN) to facilitate the deployment of safety-critical industrial applications that require real-time communication. However, there remains a fundamental disconnect between the probabilistic 5G delay characteristics and the often idealistic delay models used to synthesize 5G-TSN network configurations. For time-driven schedules in particular, any delay outlier unforeseen during schedule synthesis can jeopardize the robustness of their real-time guarantees. To address this challenge, we present the (m,k)-firm Elevation Policy to uphold a base level of weakly hard real-time guarantees during unstable network conditions that do not match the expected delay characteristics. It augments the primary time-driven schedule with a dynamic priority-driven scheme to elevate the priority of m out of k consecutive frames if they are delayed. Our evaluations demonstrate that weakly hard real-time guarantees are essential to uphold the quality of control within a networked control system. At the same time, only a small overhead is imposed when the primary schedule can provide stronger quality of service guarantees. Our (m,k)-firm Elevation Policy thereby yields a robust but light-weight fallback mechanism to serve applications with meaningful guarantees during unstable network conditions. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2508_09769 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | An (m,k)-firm Elevation Policy to Increase the Robustness of Time-Driven Schedules in 5G Time-Sensitive Networks Egger, Simon Laidig, Robin Geppert, Heiko Haug, Lucas Herrmann, Jona Dürr, Frank Becker, Christian Networking and Internet Architecture Current standardization efforts are advancing the integration of 5G and Time-Sensitive Networking (TSN) to facilitate the deployment of safety-critical industrial applications that require real-time communication. However, there remains a fundamental disconnect between the probabilistic 5G delay characteristics and the often idealistic delay models used to synthesize 5G-TSN network configurations. For time-driven schedules in particular, any delay outlier unforeseen during schedule synthesis can jeopardize the robustness of their real-time guarantees. To address this challenge, we present the (m,k)-firm Elevation Policy to uphold a base level of weakly hard real-time guarantees during unstable network conditions that do not match the expected delay characteristics. It augments the primary time-driven schedule with a dynamic priority-driven scheme to elevate the priority of m out of k consecutive frames if they are delayed. Our evaluations demonstrate that weakly hard real-time guarantees are essential to uphold the quality of control within a networked control system. At the same time, only a small overhead is imposed when the primary schedule can provide stronger quality of service guarantees. Our (m,k)-firm Elevation Policy thereby yields a robust but light-weight fallback mechanism to serve applications with meaningful guarantees during unstable network conditions. |
| title | An (m,k)-firm Elevation Policy to Increase the Robustness of Time-Driven Schedules in 5G Time-Sensitive Networks |
| topic | Networking and Internet Architecture |
| url | https://arxiv.org/abs/2508.09769 |