Control Channel Frequency Hopping Across BWPs for RedCap Coverage
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Solution Overview
Problem
Reduced capability NR devices (RedCap UEs) face challenges with coverage performance due to lower bandwidth parts (BWPs), impacting PDCCH and PUCCH channels, necessitating improved frequency hopping strategies.
Innovation Solution
Implement frequency hopping across explicitly configured BWPs for PDCCH and PUCCH, using control channel offsets to determine resources in different BWPs for repetitions, enhancing frequency diversity gain.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If RedCap UEs use lower size BWP to reduce power consumption, then power consumption is reduced, but coverage performance deteriorates
Solution Approach 1:
The patent implements dynamic BWP switching for control channels, allowing the UE to switch between a first BWP and a second BWP based on reception conditions. When coverage performance degrades in the first BWP, the system dynamically switches to the second BWP with different frequency resources, thereby adapting to changing channel conditions while maintaining power efficiency
Solution Approach 2:
The patent changes the frequency domain parameters by configuring a second BWP with different bandwidth and frequency location than the first BWP. This parameter change allows the control channel to be transmitted in alternative frequency resources when the original BWP experiences poor coverage, thus improving reliability without increasing power consumption
2Use of energy by moving object
If RedCap UEs use lower size BWP to reduce power consumption, then power consumption is reduced, but reception reliability deteriorates
Solution Approach 1:
The system dynamically switches between control channel transmission resources in different BWPs based on reception quality. When reception reliability falls below a threshold in the first BWP, the base station dynamically switches to transmit control information in the second BWP, thereby maintaining reliable reception while the UE continues to operate with low power consumption configuration
Solution Approach 2:
The patent creates an alternative control channel resource in the second BWP that serves as a backup or copy of the control information transmission. When the first BWP fails to provide reliable reception, this copied control channel in the second BWP can be used, ensuring reception reliability without requiring the UE to continuously monitor high-power wide bandwidth
Data Source
AI summary
Embodiments of the present application are directed to a method and apparatus for frequency hopping for control channels for devices with reduced capabilities. The method may include: receiving configurations of a plurality of bandwidth parts (BWPs); receiving a configuration of control channel offset for a control channel; determining a corresponding control channel resource in a corresponding BWP for each set of a plurality of sets of repetitions by using at least the configuration of the control channel offset and the configurations of the BWPs.