UE Capability Identification for Handover Signaling
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Solution Overview
Problem
The increasing complexity of terminal capability information in wireless communications leads to significant signaling overhead and challenges in core network storage, and handover failures due to unsupported terminal capabilities during network transitions.
Innovation Solution
A method where the source network sends UE capability identification information to the target network during handover, and if unsupported, provides the UE capability information directly, ensuring successful handover and minimizing signaling overhead by avoiding the need for the target network to support optimized terminal capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the terminal reports detailed capability information to the access network during registration, then the access network can provide appropriate configuration, but the signaling overhead increases significantly
Solution Approach 1:
The patent extracts only the essential capability identification information from the complete terminal capability information, transmitting only this condensed identifier through the core network during handover, while retaining the ability to retrieve detailed capability information locally from the access network when needed.
Solution Approach 2:
The patent introduces capability identification information as an intermediary element that mediates between the terminal and the access network during handover, allowing the core network to transmit minimal information while still enabling the target access network to determine appropriate configurations.
2Reliability
If the core network stores capability information of all terminals, then the access network can retrieve it during handover, but the core network faces great challenges in storage capacity
Solution Approach 1:
The patent extracts only the capability identification information from the complete capability data, storing and transmitting this compact identifier through the core network, while the detailed capability information remains stored locally in the access network where it is needed.
Solution Approach 2:
The patent segments the capability information into two parts: the capability identification information (stored and transmitted through the core network) and the detailed capability information (stored locally in the access network), allowing the core network to maintain minimal storage requirements.
3Adaptability or versatility
If the target network does not support optimized terminal capabilities, then handover may occur, but the handover process becomes abnormal when the target network cannot identify the terminal capability information
Solution Approach 1:
The patent performs preliminary transmission of capability identification information through the core network before handover execution, allowing the target access network to prepare appropriate configurations in advance, even if it cannot fully support optimized terminal capabilities.
Solution Approach 2:
The patent uses capability identification information as an intermediary that enables the target access network to determine its support level for terminal capabilities, allowing it to select appropriate configuration strategies whether or not it supports optimized capabilities.
Data Source
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AI summary
A method and device for acquiring terminal capability, and a computer storage medium, the method comprising: a first access network device sending a first handover request message to a second access network device, the first handover request message carrying first UE capability identification information of a terminal (301); if the second access network device can identify the first UE capability identification information of the terminal, the second access network device determining first UE capability information of the terminal on the basis of the first UE capability identification information; if the second access network device cannot identify the first UE capability identification information of the terminal, the second access network device acquiring first UE capability information from the first access network device.