UE Capability Filter Ignoring for Signaling Load Reduction
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Solution Overview
Problem
Reduced capability user equipment (UE) devices, such as RedCap UEs, face challenges in timely capability filtering due to high processing demands, leading to potential delays in RRC establishment and increased battery consumption, while network nodes may mistakenly believe capability filters are being complied with when they are not.
Innovation Solution
The UE determines whether to ignore the capability filter, compiling a list of candidate band combinations based on its supported bands rather than the filter criteria, and transmits an indication to the network node, allowing it to decide on requesting additional capabilities and reducing signaling load.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the UE applies capability filtering to report only frequency bands matching the filter criteria, then the signaling load is reduced, but the processing time increases and battery consumption increases for reduced capability UEs
Solution Approach 1:
The patent extracts the capability filter application step from the UE capability reporting process. Reduced capability UEs are allowed to ignore the capability filter and report all supported frequency bands without filtering, while full capability UEs continue to apply the filter. This separation removes the processing burden of filtering from reduced capability UEs, reducing their processing time and battery consumption while maintaining reduced signaling load through selective reporting.
2Productivity
If the UE ignores the capability filter and reports all supported bands, then the processing time is reduced, but the signaling load increases
Solution Approach 1:
The patent introduces dynamic behavior where the UE capability reporting adapts based on UE capability type. Full capability UEs dynamically apply the capability filter to reduce signaling load, while reduced capability UEs dynamically ignore the filter to improve reporting speed. The network dynamically adjusts its capability enquiry approach based on the UE type, creating a flexible system that optimizes both signaling load and reporting speed for different device categories.
3Loss of information
If the network requests capability information for all frequency bands, then complete UE capability information is obtained, but the RRC establishment time increases
Solution Approach 1:
The patent segments the UE capability reporting process into two distinct paths based on UE capability type. For reduced capability UEs, the network accepts unfiltered reports of all supported bands without requiring further filtering operations, completing the capability acquisition quickly. For full capability UEs, the network receives filtered reports matching the capability filter criteria. This segmentation allows the network to obtain complete relevant capability information faster by treating different UE types differently throughout the RRC establishment process.
4Quantity of substance
If reduced capability UEs apply capability filtering, then the signaling load is reduced, but the battery consumption increases due to high processing demands
Solution Approach 1:
The patent enables reduced capability UEs to serve themselves by ignoring the capability filter and reporting all supported frequency bands without performing filtering operations. This self-service approach eliminates the processing burden of capability filtering from reduced capability UEs, significantly reducing their battery consumption. The network adapts by accepting these unfiltered reports appropriately, maintaining efficient operation without requiring the UEs to expend energy on filtering operations they are not optimized for.
Data Source
AI summary
An apparatus configured to: determine whether to ignore a capability filter, wherein the capability filter defines a set of frequency bands for reporting a capability information message; and transmit, to a network node in response to the determining, an indication of whether the apparatus has determined to ignore the capability filter. An apparatus configured to: transmit, to a user equipment, a user equipment capability enquiry, wherein the user equipment capability enquiry comprises, at least, a capability filter defining a set of frequency bands for reporting a capability information message; receive, from the user equipment, an indication of whether the user equipment has determined to ignore the capability filter; and determine, whether to request at least one additional capability from the user equipment based, at least partially, on the indication.