5G Relay Node Connection Reestablishment Context Management
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Solution Overview
Problem
Current 5G communication systems lack efficient methods for reestablishing connections between relay nodes and user equipment (UE) after a connection failure, particularly in managing contexts and interfaces, which disrupts service continuity and network stability.
Innovation Solution
A method involving message exchanges between nodes for reestablishing connections, acquiring and managing contexts, and updating interface configurations to ensure seamless reconnection and service continuity, including reestablishment messages, context request/response processes, and interface management requests/responses between relay nodes and anchor nodes or central units.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If connection reestablishment procedures are implemented in 5G relay node systems, then service continuity and network stability are improved, but system complexity and signaling overhead increase
Solution Approach 1:
The connection reestablishment procedure is segmented into distinct phases: failure detection at the relay node, context preservation at the anchor node, and selective reestablishment based on failure type. This segmentation allows the system to handle different failure scenarios (radio link failure vs. handover failure) through targeted procedures rather than comprehensive reconfiguration, reducing overall system complexity while maintaining service continuity.
Solution Approach 2:
The anchor node performs preliminary actions by preserving the relay node's context information before connection failure occurs. This pre-prepared context includes configuration parameters and state information that enable rapid reestablishment without requiring full system reconfiguration, thus improving reliability while minimizing the complexity of the reestablishment procedure itself.
2Loss of time
If context preservation and management mechanisms are implemented at anchor nodes, then connection reestablishment speed is improved, but memory and processing requirements increase
Solution Approach 1:
The system extracts and preserves only the essential context information required for connection reestablishment at the anchor node, rather than maintaining complete system state. This extracted context includes critical parameters such as configuration data and state information needed for rapid reconnection, reducing memory requirements while still enabling fast reestablishment compared to full context preservation approaches.
Solution Approach 2:
Context preservation is implemented with local quality by maintaining different levels of detail for different types of information. The anchor node preserves detailed context for active relay nodes while using summarized or placeholder information for inactive nodes, optimizing memory utilization based on the actual need for rapid reestablishment rather than uniformly preserving all possible context data.
3Stability of the object's composition
If comprehensive interface management procedures are implemented during reestablishment, then connection stability is improved, but signaling overhead and processing time increase
Solution Approach 1:
Interface management procedures are implemented dynamically based on the type of connection failure detected. For radio link failures, the system performs minimal interface reconfiguration to maintain stability with reduced processing time. For handover failures, more comprehensive interface management is applied. This dynamic approach optimizes the balance between connection stability and processing time by adapting the management intensity to the specific failure scenario.
Solution Approach 2:
The system changes key parameters during reestablishment based on failure type and current system state. Configuration parameters such as interface activation states, resource allocation settings, and protocol stack configurations are selectively modified rather than comprehensively reconfigured. This parameter-based approach maintains connection stability through necessary changes while minimizing processing time by avoiding unnecessary parameter modifications.
Data Source
AI summary
The present disclosure provides a connection reestablishment method, including: receiving a reestablishment message from a second node, the reestablishment message including information related to a configuration of the second node; performing a configuration based on the received reestablishment message; and transmitting a reestablishment complete message to the second node. The present disclosure also provides a context acquisition method, an interface management method, a UE context management method, a UE context acquisition method, a method for triggering UE to reestablish a connection, and various nodes and computer-readable medium that perform the above methods.