UE Capability Version Indicator Signaling Overhead
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The frequent reporting of updated user equipment (UE) capability by UE to the network leads to significant signaling overhead on the Uu interface between the UE and the base station, particularly in 5G communication systems using high-frequency bands like the 60 GHz band.
Innovation Solution
The UE reduces signaling overhead by transmitting a version indicator instead of the entire UE capability, allowing the network to determine if the capability has been updated and requesting the updated capability only when necessary.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE frequently reports updated UE capability to the network, then the network can ensure accurate and up-to-date capability information, but the signaling overhead on the Uu interface increases significantly
Solution Approach 1:
The patent extracts only the essential change information (capability version indicator and change type) from the complete UE capability data and transmits only this extracted information to the network. This allows the network to understand what changed without receiving the entire capability dataset, significantly reducing signaling overhead while maintaining accuracy of capability information.
Solution Approach 2:
The patent uses a capability version indicator that acts as a copy or reference to the complete capability data. Instead of transmitting the full capability information, the UE transmits a version indicator that references the capability data stored in the network, allowing the network to retrieve the complete information only when needed while reducing frequent signaling.
2Loss of information
If the UE transmits the entire UE capability every time it updates, then the network receives complete capability information, but the signaling overhead and network resource consumption increase
Solution Approach 1:
The patent extracts only the essential change information (capability version indicator and change type) from the complete UE capability data and transmits only this extracted information to the network. This allows the network to understand what changed without receiving the entire capability dataset, significantly reducing signaling overhead while maintaining accuracy of capability information.
Solution Approach 2:
The patent implements preliminary action by having the UE and network agree on capability versioning before updates occur. The capability version indicator is pre-established, allowing the UE to simply transmit the version number and change type when updates occur, rather than transmitting the complete capability data each time.
3Adaptability or versatility
If the network requests UE capability continuously to manage UE mobility, then the network can properly manage radio resources, but the signaling overhead on the Uu interface increases
Solution Approach 1:
The patent implements feedback by having the UE send capability version indicators and change type information to the network, allowing the network to understand what has changed in UE capability. This feedback mechanism enables the network to manage mobility adaptively without requiring continuous full capability requests, reducing signaling overhead while maintaining management capability.
Solution Approach 2:
The patent introduces dynamics by enabling the UE capability reporting mechanism to adapt based on actual changes. Instead of continuous static requests, the system dynamically triggers capability updates only when changes occur, using version indicators to communicate these changes efficiently to the network for mobility management.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
Disclosed are a method for transferring a user equipment (UE) capability and an apparatus for supporting the same. The method comprises the steps of: updating a version of the UE capability by the UE; determining, by the UE, whether the UE capability of the updated current version has been stored in a base station; and transmitting, by the UE, a version index indicating the current version to the base station when it is determined that the UE capability of the current version has been stored in the base station.