Adaptive Signal Strength Thresholds for RedCap UE Radio Procedures
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Solution Overview
Problem
The existing signaling procedures for radio procedures in reduced capability (RedCap) user equipment (UE) in New Radio (NR) networks are inadequate, leading to significant degradation in network coverage due to varying signal measurement performance across different receiver configurations, resulting in coverage holes.
Innovation Solution
Adaptive signal strength thresholds are introduced, where the UE receives different signal strength thresholds based on its receiver configuration, allowing it to perform radio procedures optimally regardless of the number of receive branches, thereby mitigating interference and improving measurement accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If RedCap UE uses 1 Rx branch configuration, then device complexity and power consumption are reduced, but signal measurement precision deteriorates
Solution Approach 1:
The patent applies parameter changes by introducing receiver configuration indicators that signal different receiver configurations (1 Rx or 2 Rx branches) to the network node. The network then adjusts signal strength thresholds based on the indicated configuration, compensating for the measurement precision limitations of 1 Rx branches through adaptive threshold modification rather than hardware enhancement
Solution Approach 2:
The patent introduces receiver configuration indicators as an intermediary mechanism between the UE and network node. These indicators enable the network to understand the UE's receiver capabilities and adjust thresholds accordingly, serving as a communication bridge that resolves the contradiction between using simple receivers and achieving accurate measurements
2Device complexity
If existing signal strength thresholds are used for RedCap UE with varying receiver configurations, then signaling procedures remain simple, but network coverage reliability deteriorates
Solution Approach 1:
The patent implements dynamics by making signal strength thresholds adaptive rather than fixed. The thresholds dynamically adjust based on the UE's receiver configuration indicated by the receiver configuration indicator, allowing the system to adapt to different receiver capabilities and maintain reliable network coverage across heterogeneous UE types
Solution Approach 2:
The patent applies local quality by tailoring signal strength thresholds to specific local conditions - namely, the individual receiver configuration of each UE. Different thresholds are applied to different UE types (1 Rx vs 2 Rx) to optimize performance for each local scenario rather than using a uniform threshold for all UEs
Data Source
AI summary
The present disclosure relates to adaptive signal strength thresholds and other parameters to support reduced capability UEs. In embodiments of the present invention, a UE receives a first signal strength threshold value from a network node, and, from the received first signal strength threshold value, the UE derives a second signal strength threshold value associated with a receiver configuration supported by the UE for performing a radio procedure. The derived second signal strength threshold value is used when performing the radio procedure.