Terminal Device Identifier Conflict Resolution
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Solution Overview
Problem
In wireless communication systems, particularly in 5G networks, the use of a common identifier space for conditional cell change procedures can lead to identifier conflicts when multiple access nodes independently trigger concurrent cell change procedures, resulting in erroneous behavior and performance issues in terminal devices.
Innovation Solution
The proposed solution involves an apparatus and method in a terminal device that receives cell change messages from different access nodes, distinguishes between them using node-specific information, and manages concurrent cell change procedures by associating each access node with a unique identifier or flag, thereby resolving conflicts and ensuring correct procedure execution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a common identifier space is used for conditional cell change procedures, then identifier management is simplified, but identifier conflicts occur when multiple access nodes independently trigger concurrent cell change procedures
Solution Approach 1:
The patent segments the common identifier space by introducing access node-specific identifier spaces. Each access node (MN and SN) maintains separate identifier spaces, eliminating conflicts while preserving the simplicity of identifier management within each node. This segmentation allows independent identifier allocation without interference between nodes.
Solution Approach 2:
The patent introduces an intermediary mechanism where the terminal device reports received cell change messages and their identifiers to the network. The network then coordinates identifier allocation to avoid conflicts, acting as a mediator that resolves potential identifier collisions between different access nodes.
2Adaptability or versatility
If multiple access nodes independently allocate identifiers, then each node has autonomy in managing its procedures, but identifier conflicts arise that cause erroneous terminal behavior
Solution Approach 1:
The patent segments the identifier allocation authority by node type, allowing MN and SN to independently manage their own identifier spaces. This maintains autonomy for each node while preventing conflicts through spatial separation of identifier spaces.
Solution Approach 2:
The patent implements a feedback mechanism where the terminal device monitors received cell change messages and reports identifier conflicts or ambiguities to the network. This feedback loop enables the network to adjust identifier allocation and maintain accurate procedure identification.
3Ease of manufacture
If a common identifier space is used, then configuration is simpler, but concurrent procedures mix information leading to performance issues
Solution Approach 1:
The patent segments the identifier management into node-specific spaces, which maintains configuration simplicity within each node while preventing information mixing between concurrent procedures from different nodes.
Solution Approach 2:
The patent applies local quality by making identifier spaces node-specific rather than globally common. Each node's identifier space is optimized for its local procedure management needs, preventing cross-node interference while maintaining local simplicity.
Data Source
AI summary
This document discloses a solution for handling a conflict of identifiers in a terminal device. According to an aspect, a method comprises: receiving a first cell change message of a first cell change procedure from a first access node serving the terminal device, the first cell change message comprising an identifier of the first cell change procedure; receiving a second cell change message of a second cell change procedure from a second access node serving the terminal device, the second cell change message comprising an identifier of the second cell change procedure, wherein the identifier of the first cell change procedure is identical to the identifier of the second cell change procedure; using information on the first access node and information on the second access node to distinguish the first cell procedure and the second cell change procedure in the apparatus.