CNC TSN Flow Scheduling via Bridge Time Granularity
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current Time Sensitive Networking (TSN) systems face challenges in optimizing transmission delays in wireless bridges, particularly in 5G systems, due to the variability in wireless link quality and resource allocation, which affects the deterministic and bounded transmission delays required for TSN traffic.
Innovation Solution
The method involves obtaining assistance information from TSN bridges regarding the time granularity of transmission opportunities, allowing the central network configuration entity (CNC) to schedule TSN flows with precise time sequences down to the slot level, thereby optimizing transmission delays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If TSN flows are scheduled in wireless bridges without considering time granularity of transmission opportunities, then scheduling simplicity is maintained, but transmission delay optimization is lost
Solution Approach 1:
The patent applies parameter changes by introducing time granularity parameters (slot duration, transmission opportunity timing) into the TSN scheduling process. The CNC obtains assistance information about transmission opportunity timing from wireless bridges and uses these parameters to compute precise time sequences for TSN flows, transforming the scheduling from coarse-grained to fine-grained time control, thereby optimizing transmission delays while maintaining manageable complexity through standardized parameter exchange.
2Loss of time
If TSN scheduling is performed without assistance information from bridges, then system complexity is reduced, but transmission delay optimization capability is lost
Solution Approach 1:
The patent implements preliminary action by having wireless bridges pre-compute and provide assistance information about their transmission opportunity timing to the CNC before TSN flow scheduling occurs. This advance provision of timing information enables the CNC to optimize end-to-end schedules without real-time complexity, as the bridge capabilities are known in advance, allowing delayed but optimized scheduling decisions.
3Reliability
If wireless bridges operate without time-synchronized transmission opportunities, then wireless flexibility is maintained, but deterministic transmission delays cannot be guaranteed
Solution Approach 1:
The patent applies universality by making the time synchronization mechanism applicable to multiple wireless bridges simultaneously through a centralized coordination approach. The CNC collects timing information from multiple bridges and computes unified schedules that work across all bridges in the network, allowing deterministic performance guarantees to be extended network-wide rather than requiring complex distributed synchronization between each bridge pair.
Data Source
AI summary
The disclosure relates to a method for scheduling TSN flows in a communication system within a time-sensitive network.The method is implemented at a central network configuration entity.Assistance information relating to a time granularity of transmission opportunities within a radio frame is obtained from at least one TSN bridge.Based on the obtained assistance information, a plurality of TSN flows is scheduled by computing time sequences of said TSN flows down to said time granularity.The disclosure further relates to a corresponding communication system and a corresponding central network configuration entity.