UE Radio Capability Filtering to Avoid Network Rejections
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Solution Overview
Problem
User Equipment (UE) may autonomously attempt to communicate using restricted radio capabilities, leading to increased latency and power loss due to network rejections.
Innovation Solution
A network-controlled mechanism where the network identifies restricted radio capabilities based on UE subscription information, transmits a UE radio capability modification indication, and the UE disables these capabilities, ensuring communication only through non-restricted capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the UE autonomously attempts to communicate using multiple radio capabilities, then the UE can maintain communication flexibility and support multiple networks, but the UE experiences increased latency and power loss due to network rejections
Solution Approach 1:
The network performs preliminary action by identifying and filtering restricted radio capabilities from the UE's supported capabilities before the UE attempts communication. The network sends a capability modification indication to the UE in advance, allowing the UE to proactively disable restricted capabilities and avoid unnecessary communication attempts, thereby reducing latency while maintaining flexibility for non-restricted capabilities
Solution Approach 2:
The network provides feedback to the UE by transmitting a capability modification indication that informs the UE which radio capabilities are restricted. This feedback mechanism allows the UE to adjust its behavior accordingly, disabling only the restricted capabilities while maintaining others, thus resolving the contradiction between communication flexibility and latency reduction
2Adaptability or versatility
If the UE autonomously attempts to communicate using multiple radio capabilities, then the UE can maintain communication flexibility, but the UE experiences increased power loss due to repeated communication attempts and rejections
Solution Approach 1:
The network performs preliminary action by filtering restricted capabilities and sending the capability modification indication to the UE before the UE expends energy on unsuccessful communication attempts. This allows the UE to proactively disable restricted capabilities, avoiding wasted power while maintaining flexibility for non-restricted capabilities
Solution Approach 2:
The network provides feedback through the capability modification indication, enabling the UE to make informed decisions about which capabilities to use. This feedback loop prevents the UE from wasting energy on restricted capabilities while preserving energy efficiency for allowed capabilities, resolving the contradiction between flexibility and power consumption
3Reliability
If the network filters restricted radio capabilities from the UE's supported capabilities, then communication reliability is improved, but additional signaling overhead is introduced
Solution Approach 1:
The network extracts only the necessary information (capability modification indication) from the UE's full capability set and sends it to the UE. This extraction approach improves reliability by providing targeted guidance on restricted capabilities while minimizing signaling overhead by transmitting only the essential modification information rather than complete capability sets
Solution Approach 2:
The network changes the parameter state by sending a capability modification indication that alters the UE's operational capabilities. This parameter change approach improves reliability by ensuring the UE operates only with allowed capabilities while keeping signaling overhead low through efficient parameter representation and transmission
Data Source
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AI summary
Methods, systems, and devices for wireless communications are described. To communicate using non-restricted radio capabilities, a user equipment (UE) may transmit a UE capability message to a network (e.g., via a base station) that indicates a set of radio capabilities that the UE may use to communicate. The network may identify subscription information for the UE and may determine one or more restricted radio capabilities of the set of radio capabilities based on the subscription information for the UE. The network may transmit a message to the UE that includes a radio capability modification indication indicating the one or more restricted radio capabilities and a UE radio capability identifier corresponding to the subset of radio capabilities of the set of radio capabilities that are not restricted. The UE may receive the message, identify the restricted radio capabilities, and communicate with the network using the subset of non-restricted radio capabilities.