UE Capability Signaling with Network Size Limits
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Solution Overview
Problem
User equipment (UE) often transmits UE capability information messages that exceed the processing limits of network infrastructure, leading to attach failures and call drops, resulting in a poor user experience due to the UE's unawareness of the network's size limitations.
Innovation Solution
The UE receives a size limit indication from the network and generates and transmits a UE capability information message that adheres to this limit, either by restricting the message size or segmenting it according to the provided size and segment limits, ensuring the network can process the information successfully.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If the UE transmits complete UE capability information without size restriction, then the network receives comprehensive capability data, but the network infrastructure cannot process the message due to buffer size limitations
Solution Approach 1:
The UE capability information message is divided into multiple segments, where each segment fits within the network's buffer size limit. The message includes segment identifiers and total segment count, allowing the network to reconstruct the complete capability information from multiple received segments without overwhelming its processing capacity.
Solution Approach 2:
The message size parameter is dynamically adjusted based on the network's indicated buffer capacity. The UE modifies the transmission parameters of the capability information to match the network's processing capabilities, ensuring reliable delivery while maintaining information completeness.
2Adaptability or versatility
If the UE generates UE capability information message without knowing network limits, then the UE transmits all available capability data, but this causes attach failures and call drops due to exceeding network buffer capacity
Solution Approach 1:
The network provides feedback to the UE regarding its buffer size capacity through dedicated signaling. The UE uses this feedback information to adaptively adjust the size and segmentation of its capability information messages, creating a closed-loop system that ensures stable connections while maintaining comprehensive capability reporting.
3Reliability
If the network provides buffer size information to the UE, then the UE can adjust message size accordingly, but this requires additional signaling overhead
Solution Approach 1:
The network provides buffer size information to the UE during the initial connection establishment phase, before the UE needs to transmit its capability information. This preliminary provision of parameters allows the UE to prepare appropriately-sized messages without requiring additional back-and-forth signaling during the capability exchange process.
Data Source
AI summary
A device and method for generating a user equipment (UE) capability information message. In a first embodiment, a UE receives a request for the radio access capabilities of the UE and a size limit indication for a message to be generated by the UE that includes the radio access capabilities. The UE generates the message that includes the radio access capabilities based on the size limit then transmits the message to the network. In a second embodiment, a UE receives a request for the radio access capabilities of the UE. The UE also receives a segment limit indication and a size limit indication for a message to be generated by the UE that includes the radio access capabilities. The UE generates the message where the message includes a plurality of segments based on the segment limit. Subsequently, the UE transmits the message to the network.