5G Boundary Node Output Pacing for TSN Buffer Overflow
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Solution Overview
Problem
The integration of a 5G system with a Time-Sensitive Networking (TSN) network faces challenges such as burst traffic overflowing buffers in TSN nodes, leading to congestion and loss, and the need to convey TSN information with mixed service profiles and Quality of Service (QoS) requirements, which existing technologies struggle to address effectively.
Innovation Solution
Implementing an output pacing mechanism at the boundary between the 5G system and the TSN network, where the 5G system learns traffic patterns and QoS information from the TSN network to synchronize and pace user plane traffic, avoiding buffer overflow and ensuring congestion-free transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If 5G system transmits user plane traffic to TSN network without output pacing, then traffic transmission speed is high, but buffer overflow and congestion occur in TSN nodes
Solution Approach 1:
The patent implements output pacing that periodically controls the transmission of user plane traffic from the 5G system to the TSN network. The boundary node regulates traffic output at controlled intervals to match the desired rate at the next hop TSN node, preventing buffer overflow while maintaining reliable transmission. This periodic rate matching resolves the contradiction between high transmission speed and buffer overflow prevention.
2Adaptability or versatility
If 5G system integrates with TSN network without output pacing, then network integration is achieved, but congestion delay and packet loss occur
Solution Approach 1:
The patent employs feedback mechanisms where the boundary node monitors traffic patterns and QoS information from the TSN network, then adjusts output pacing accordingly. The system learns traffic patterns and uses this feedback to synchronize traffic output with TSN node requirements, preventing congestion delay and packet loss while maintaining network integration. This feedback loop resolves the contradiction between network integration and congestion delay.
3Productivity
If 5G system outputs user plane traffic at high rate, then productivity is high, but packet loss increases due to buffer overflow
Solution Approach 1:
The patent dynamically changes the output rate parameter of user plane traffic based on learned traffic patterns and QoS requirements from the TSN network. The boundary node adjusts the transmission rate parameter to match the desired rate at the next hop TSN node, preventing buffer overflow and packet loss while maintaining high productivity when conditions allow. This parameter adaptation resolves the contradiction between traffic output rate and packet loss.
Data Source
AI summary
Systems and methods are disclosed herein for output pacing in a cellular communications system that serves as a virtual Time-Sensitive Networking (TSN) node in a TSN network. In some embodiments, a method of operation of a boundary node associated with a cellular communications system that operates as a virtual TSN node in a TSN network comprises receiving user plane traffic from a node in the cellular communications system. The user plane traffic is user plane traffic received by the cellular communications system from a previous hop TSN node. The method further comprises performing output pacing for the user plane traffic when outputting the user plane traffic to a next hop TSN node such that the user plane traffic is output to the next hop TSN node at a rate that matches a desired rate at the next hop TSN node. Corresponding embodiments of a boundary node are also disclosed.