Access Node Traffic Splitting for Independent Service Planes
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Solution Overview
Problem
Current IP bearer networks face reliability issues due to faults in service detection technologies like OAM and BFD, leading to continuous service interruptions when protection switching fails, as both core network devices rely on the same transmission path, resulting in insufficient service availability.
Innovation Solution
Implementing a data transmission method where traffic is split at the access node and transmitted through independent service planes, allowing the control plane to switch services to another core network device when a fault occurs, ensuring continuous service even if one transmission path is completely interrupted.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If both core network devices rely on the same transmission path, then device complexity is reduced, but service reliability deteriorates due to continuous service interruptions when protection switching fails
Solution Approach 1:
The transmission path is segmented into multiple independent service planes (first service plane and second service plane). Each service plane provides separate transmission paths from the access node to different core network devices, eliminating the single point of failure in the original unified path and enabling independent fault isolation.
Solution Approach 2:
The system changes the topology parameter of the transmission path from a single shared path to multiple independent paths. By introducing path diversity as a new parameter configuration, the system achieves both improved reliability through redundancy and controlled complexity through structured path management.
2Reliability
If detection technologies like OAM and BFD are used to detect tunnel connectivity, then fault detection capability is improved, but service availability deteriorates when protection switching fails and service data continues to be transmitted on faulty paths
Solution Approach 1:
The system performs preliminary routing configuration by establishing multiple service planes in advance with pre-configured routing information. When a fault is detected, the system can immediately switch to a pre-prepared alternative path without requiring complex real-time decision-making, thus improving service availability while maintaining detection precision.
Solution Approach 2:
The system introduces an intermediary routing mechanism that mediates between fault detection and service continuity. The routing information and service plane configuration act as intermediaries, allowing the system to maintain service availability by redirecting traffic through alternative paths when faults are detected, rather than directly interrupting service.
3Reliability
If a single transmission path is used for both core network devices, then device complexity is reduced, but reliability deteriorates because service continuity cannot be ensured when the path fails
Solution Approach 1:
The transmission system is segmented into multiple independent service planes, each handling traffic to specific core network devices. This segmentation ensures that a failure in one service plane does not affect others, guaranteeing service continuity while organizing complexity into manageable, isolated units.
Solution Approach 2:
The system implements dynamic path selection capability where service planes can be activated or deactivated based on real-time network conditions and fault status. This dynamic behavior allows the system to adapt to failures and maintain service continuity while keeping the overall architecture flexible and manageable.
Data Source
AI summary
A data transmission method includes an access node sends first traffic to a first core network device in a core network through a first service plane of a bearer network. The access node sends second traffic to a second core network device in the core network through a second service plane of the bearer network. The first service plane and second service plane are independent all-active service planes in the bearer network. Service data sent by the base station is split on the access node, and split data each corresponds to one transmission path. Even if one transmission path is completely interrupted, the service data may still be transmitted by another core network device through the other transmission path.