Cell Handover via Terminal Capability Signaling
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Solution Overview
Problem
Multi-card terminals face various issues such as communication performance degradation, paging collisions, resource wastage, and service disruptions due to the lack of standardized processing methods and capabilities, leading to inefficiencies in cell handover processes.
Innovation Solution
A cell handover method where a source base station sends handover request signaling and target terminal capability information to a core network device, which then determines and commands a target base station to accept the handover based on the multi-card terminal's capabilities, enabling controlled cell handover and addressing specific multi-card problems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multi-card terminals use non-standardized processing methods (dual-card single-standby, dual-card dual-standby single-pass, dual-card dual-standby dual-pass), then terminal behavior diversity is achieved, but communication performance degrades and resource wastage occurs
Solution Approach 1:
The patent changes the parameter of terminal capability information from non-standardized diverse behaviors to standardized capability parameters. By defining specific capability parameters (multi-card capability, multi-card problem reporting capability) that can be transmitted and matched, the system transforms uncoordinated terminal behaviors into standardized, matchable capability profiles, resolving the contradiction between adaptability and performance.
Solution Approach 2:
The patent performs preliminary action by having terminals pre-report their capability information to the network before handover occurs. The source base station obtains and forwards this capability information to the target base station in advance, allowing the target base station to prepare appropriate handover parameters and strategies beforehand, thus avoiding performance degradation during the actual handover process.
2Device complexity
If capability information is not transmitted during handover, then handover process is simple, but target base station cannot provide targeted solutions for multi-card problems
Solution Approach 1:
The patent uses capability information as an intermediary element that bridges the terminal and base station. This intermediary carries essential multi-card capability parameters from the terminal through the source base station to the target base station, enabling the target base station to understand terminal capabilities and provide appropriate handling without requiring complex direct terminal-base station negotiation during handover.
Solution Approach 2:
The patent segments the capability information into distinct parameters (multi-card capability, multi-card problem reporting capability) that can be independently processed and matched. This segmentation allows the handover process to remain relatively simple while enabling the target base station to selectively apply different handling strategies based on specific capability parameters.
3Productivity
If standardized capability matching is implemented, then resource allocation efficiency improves, but signaling overhead increases due to capability information transmission
Solution Approach 1:
The patent extracts only the essential capability parameters needed for handover decision-making (multi-card capability, multi-card problem reporting capability) from the complete terminal capability set. By taking out only these specific, relevant parameters rather than transmitting all terminal capabilities, the system achieves effective capability matching while minimizing signaling overhead.
Data Source
AI summary
A cell handover method is provided. The method is performed by a source base station. The method includes determining that a multi-card terminal needs to perform a cell handover; sending a handover request signaling and target terminal capability information of the multi-card terminal to a core network device, where the target terminal capability information is configured to indicate at least one of following capabilities: a multi-card capability supported by the multi-card terminal, or a capability of the multi-card terminal to support reporting a multi-card problem; and determining, based on a handover command returned by the core network device, that a target base station accepts a cell handover request corresponding to the multi-card terminal based on the target terminal capability information; and controlling the multi-card terminal to perform the cell handover.