De-jittering Buffer Signaling for TSN Integration in 5G
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Solution Overview
Problem
Current 5G systems face challenges in ensuring deterministic data delivery with strict latency and jitter requirements for Time Sensitive Communications (TSC) due to their non-deterministic nature, particularly when integrating with industrial Ethernet systems like Time Sensitive Networking (TSN), where precise timing and buffering are crucial but not adequately supported by existing QoS frameworks.
Innovation Solution
The implementation of a de-jittering buffer (DJB) within the 5G system, which determines and configures data flow parameters based on buffering device capabilities to ensure packets are delivered within specific egress time windows, and communicates these capabilities to control devices for precise timing and resource optimization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If 5G system operates as a non-deterministic network, then flexibility and ease of operation are improved, but deterministic delivery guarantees for TSC are worsened
Solution Approach 1:
The patent introduces a de-jittering buffer (DJB) as an intermediary component within the 5G system to bridge the gap between non-deterministic network operation and deterministic delivery requirements. The DJB receives packets with variable delays, buffers them, and releases them at precisely timed egress time windows, thereby mediating between the flexible non-deterministic network and the strict deterministic TSC requirements without requiring fundamental changes to the 5G network architecture
2Reliability
If de-jittering buffer is implemented to reduce jitter and latency, then deterministic delivery is improved, but device complexity and resource utilization are worsened
Solution Approach 1:
The patent manages buffer complexity by dynamically adjusting operational parameters such as buffer size, egress time windows, and packet prioritization levels based on network conditions and QoS requirements. This allows the DJB to provide deterministic delivery guarantees while adapting its complexity level to match actual traffic demands, avoiding unnecessary resource consumption during low-traffic periods
Solution Approach 2:
The de-jittering buffer implements dynamic behavior by continuously monitoring packet arrival patterns, adjusting buffer allocation, and modifying egress timing based on real-time network conditions. This dynamic adaptation allows the system to maintain deterministic delivery only when and where needed, rather than operating at maximum complexity continuously, thereby optimizing the trade-off between reliability and device complexity
3Measurement precision
If strict egress time windows are enforced for TSC, then measurement precision and reliability are improved, but loss of time and flexibility are worsened
Solution Approach 1:
The system performs preliminary actions by pre-calculating and signaling egress time windows to network elements before packets arrive. The DJB is configured with advance knowledge of required egress times, allowing it to proactively buffer packets and prepare for precise timed release, thereby achieving high timing precision without last-minute delays or rushes that would waste time
Data Source
AI summary
It is provided a method, including determining a parameter of a data flow to pass through a non-deterministic network and a buffering device; configuring the data flow in at least one of a network element of the non-deterministic network and the buffering device based on the parameter, wherein the parameter is determined based on a capability of the buffering device.