DetNet Resource Reservation for Conflict-Free Scheduling Cycles
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Solution Overview
Problem
Scheduling conflicts occur among DetNet flows within a DetNet domain, leading to potential forwarding conflicts and violations of transmission determinism due to exceeding forwarding capabilities in a scheduling cycle, which affects the transmission of data packets.
Innovation Solution
A resource reservation method is implemented to determine target scheduling cycles for DetNet flows on each node in the VPFP, reserving transmission resources to avoid conflicts and ensure accurate forwarding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple DetNet flows are forwarded in the same scheduling cycle through the same egress interface, then resource utilization is improved, but scheduling conflicts occur when forwarding capability is exceeded
Solution Approach 1:
The patent applies preliminary action by performing resource reservation before the scheduling cycle begins. The management plane calculates required transmission resources and reserves them in advance, allowing the forwarding plane to simply execute pre-determined scheduling decisions without conflicts. This resolves the contradiction by ensuring multiple flows can share resources efficiently while maintaining deterministic transmission through pre-computed schedules.
2Reliability
If resource reservation is performed for each scheduling cycle, then scheduling conflicts are avoided, but computational complexity increases
Solution Approach 1:
The patent segments the resource reservation process into two distinct phases: management plane calculation phase and forwarding plane execution phase. The management plane performs complex calculations to determine resource requirements and reservation parameters, while the forwarding plane executes simple lookup and forwarding operations based on pre-computed information. This segmentation resolves the contradiction by moving computational complexity to the management plane while keeping forwarding operations simple and deterministic.
Data Source
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AI summary
The embodiments of the present disclosure provide a resource reservation method and apparatus and an electronic device. In an embodiment, for each node in a VPFP of a DetNet flow, at least one target scheduling cycle for transmitting the DetNet flow of a target egress interface on the current node is determined, and a target transmission resource for transmitting the DetNet flow is reserved from the transmission resource corresponding to the target scheduling cycle, so as to transmit the DetNet flow by the target transmission resource corresponding to the target scheduling cycle on each node in the VPFP. In this way, scheduling and transmission conflicts among multiple DetNet flows can be avoided.