UE Capability Reporting With Selective Filter Bypass
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Solution Overview
Problem
Reduced capability (RedCap) UEs, such as IoT sensors and wearables, struggle with timely capability filtering due to single carrier operation, leading to non-compliance with network-specified filters and prolonged RRC processing delays, which affects network efficiency and battery consumption.
Innovation Solution
Networks allow or disallow UEs to ignore capability filters, enabling UEs to report all supported bands or a subset, and optionally exceed processing requirements, based on network indications, to ensure timely capability reporting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If UE applies capability filter to report only filtered bands, then reporting accuracy aligns with network expectations, but processing time increases beyond RRC requirements
Solution Approach 1:
The patent introduces dynamic behavior where UE can switch between two capability reporting modes based on network configuration. The network can indicate whether UE should apply the capability filter (accurate reporting) or ignore it (faster reporting), allowing the system to adapt processing strictness to specific operational contexts and UE capabilities.
Solution Approach 2:
The patent changes the parameter of capability filter application from a fixed mandatory requirement to a configurable parameter controlled by network indication. This allows the filtering parameter to be adjusted dynamically, enabling UE to comply with processing requirements while maintaining reporting accuracy when needed.
2Loss of time
If UE reports all supported bands ignoring capability filter, then processing time meets RRC requirements, but network cannot distinguish fully capable UEs from RedCap UEs
Solution Approach 1:
The patent introduces an intermediary mechanism (capability filter indication from network) that enables UE to convey capability information efficiently. By allowing UE to ignore the filter when indicated, the system achieves fast reporting while the network maintains the ability to interpret the unfiltered report correctly, preserving capability differentiation information.
3Measurement precision
If network requires strict capability filter compliance, then capability reporting accuracy is maintained, but energy consumption increases for RedCap UEs
Solution Approach 1:
The patent enables dynamic adjustment of filtering behavior based on network indication, allowing RedCap UEs to switch to a lower-power mode (ignoring filter) when the network permits, thereby reducing processing energy consumption while maintaining reporting accuracy when required.
Data Source
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AI summary
An apparatus configured to: receive, from a network node, a user equipment capability enquiry; determine whether ignoring a capability filter in a cell is allowed; generate a capability information message based, at least partially, on a determination of whether ignoring the capability filter in the cell is allowed; and transmit, to the network node, the capability information message. An apparatus configured to: provide, to a user equipment, an indication of whether the user equipment is allowed to ignore a capability filter in a cell; provide, to the user equipment, a user equipment capability enquiry with respect to, at least, the capability filter; and receive, from the user equipment in response to the user equipment capability enquiry, a capability information message.