Segment Routing Head Node Path Management via Link Quality Identifiers
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Solution Overview
Problem
In SR networks, head nodes need to maintain multiple transmission paths and segment lists, leading to performance issues due to the large quantity of paths and lists they must manage.
Innovation Solution
A packet transmission method where network nodes on the SR path carry a link quality identifier to select communication links that meet specific quality requirements, reducing the number of transmission paths and segment lists maintained by the head node.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the head node maintains multiple transmission paths and segment lists to meet SLA requirements, then the reliability of packet transmission is improved, but the device complexity and performance of the head node deteriorate
Solution Approach 1:
The patent divides the transmission path selection function into two parts: the head node maintains only the segment list (path configuration), while intermediate nodes independently select communication links based on link quality identifiers. This segmentation reduces the head node's maintenance burden while ensuring reliable transmission through distributed intelligence.
Solution Approach 2:
Intermediate nodes are empowered to autonomously select communication links that meet quality requirements using link quality identifiers in packets, without requiring the head node to manage or maintain multiple complete transmission paths. This self-service mechanism reduces head node complexity while maintaining transmission reliability.
2Adaptability or versatility
If the head node maintains a large quantity of transmission paths and segment lists, then the adaptability to meet different SLA requirements is improved, but the productivity and performance of the head node deteriorate
Solution Approach 1:
The patent extracts the path selection intelligence from the head node and places it at intermediate nodes. The head node only maintains segment lists with link quality identifiers, while intermediate nodes extract and act on these identifiers to select appropriate communication links. This extraction reduces head node workload while preserving adaptability to SLA requirements.
Solution Approach 2:
The patent introduces link quality identifiers as a new dimension of information in packets, enabling intermediate nodes to select communication links based on quality metrics rather than relying on the head node to manage multiple complete paths. This dimensional change shifts the adaptability mechanism from head node path management to intermediate node link selection.
Data Source
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AI summary
A packet transmission method, a transmission control method, an apparatus, and a system are disclosed, and relate to the field of network technologies. A segment routing (segment routing, SR) path includes a first network node and a second network node. There are a plurality of communication links between the first network node and the second network node. After obtaining a first packet, the first network node determines a first communication link based on a first link quality identifier carried in the first packet, and forwards the first packet to the second network node through the first communication link. The first link quality identifier indicates a first quality requirement on the communication link between the first network node and the second network node. The plurality of communication links between the first network node and the second network node include the first communication link, and link quality of the first communication link meets the first quality requirement. In this application, a quantity of transmission paths maintained by a head node of the SR path can be reduced, and performance of the head node can be ensured.