PDCCH Monitoring Configuration for BWP Switching
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Solution Overview
Problem
In the new radio (NR) air interface system, UEs with limited bandwidth capability face challenges in effectively monitoring the physical downlink control channel (PDCCH) when switching active downlink Bandwidth Parts (BWP), leading to inefficiencies in frequency diversity performance.
Innovation Solution
A PDCCH monitoring method that involves receiving high-layer signaling for PDCCH monitoring configuration information on the target active downlink BWP, determining the PDCCH monitoring configuration based on the relationship between current and target BWP configurations, and performing monitoring processes accordingly, including adjusting periodicity, number of monitoring times, and aggregation levels of control channel units.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE switches to a target active downlink BWP with different bandwidth characteristics, then the frequency diversity performance is improved, but the PDCCH monitoring effectiveness deteriorates due to configuration mismatch
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting PDCCH monitoring configuration parameters (such as monitoring periodicity, aggregation levels, and candidate quantities) based on the characteristics of the active downlink BWP. When the UE switches between BWPs with different bandwidths, the network configures appropriate monitoring parameters for each BWP, ensuring that the PDCCH monitoring effectiveness is maintained while allowing the UE to switch BWPs for frequency diversity.
2Reliability
If the UE monitors PDCCH on all possible BWPs, then the PDCCH monitoring coverage is improved, but the power consumption increases
Solution Approach 1:
The patent applies local quality by configuring different PDCCH monitoring parameters for different BWPs based on their specific characteristics. Instead of using a uniform monitoring configuration across all BWPs, the network provides BWP-specific monitoring configurations that are optimized for each bandwidth part. This allows the UE to monitor PDCCH effectively on the active BWP while avoiding unnecessary monitoring on inactive BWPs, thus reducing power consumption.
Solution Approach 2:
The patent applies dynamics by making the PDCCH monitoring configuration adaptive to the current active BWP. The monitoring parameters are dynamically adjusted when the UE switches between BWPs, with the network providing appropriate configuration information for each BWP. This dynamic adaptation ensures that the UE only performs monitoring at the necessary level on the active BWP, optimizing the balance between monitoring coverage and power consumption.
Data Source
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AI summary
The present application relates to the field of wireless communication technologies, and in particular, to a PDCCH monitoring method, apparatus, electronic device and computer readable storage medium. The PDCCH monitoring method includes: determining PDCCH monitoring configuration on a target active downlink bandwidth part (BWP), after a current active downlink BWP is switched to the target active downlink BWP; performing a monitoring process on the PDCCH based on the PDCCH monitoring configuration on the target active downlink BWP. The present application achieves effective monitoring of the PDCCH on the switched active downlink BWP, saves power consumption of the UE, and ensures timely transmission of data.