SBFD PDCCH Monitoring Skipping During Uplink Sub-Bands
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Solution Overview
Problem
In wireless communications systems using sub-band non-overlapping full duplex (SBFD), user equipment (UE) continues to monitor the Physical Downlink Control Channel (PDCCH) during uplink sub-bands even when no downlink data is expected, leading to unnecessary power consumption and resource wastage.
Innovation Solution
Implementing granular control channel skipping decisions by signaling a UE to refrain from monitoring the PDCCH during specified uplink sub-bands, enabling the UE to enter a low-power mode during these intervals, based on explicit or implicit network signaling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE continues to monitor the PDCCH during uplink sub-bands, then the control channel reception reliability is maintained, but the power consumption and resource wastage increase
Solution Approach 1:
The patent segments the frequency spectrum into downlink sub-bands and uplink sub-bands, allowing the UE to selectively monitor PDCCH only in downlink sub-bands while refraining from monitoring in uplink sub-bands. This segmentation enables granular control of monitoring activities, maintaining reliability where needed while reducing power consumption in uplink portions.
Solution Approach 2:
The patent introduces dynamic PDCCH monitoring adjustment based on sub-band configuration. The UE dynamically adapts its monitoring behavior by receiving SBFD configuration indicating which sub-bands are uplink sub-bands, and accordingly refrains from monitoring in those specific sub-bands while continuing to monitor in downlink sub-bands. This dynamic adjustment resolves the contradiction between maintaining reliability and reducing power consumption.
2Measurement precision
If the UE monitors the PDCCH continuously during all sub-bands, then the control signal detection capability is maintained, but the computing resource consumption increases
Solution Approach 1:
The patent divides the monitoring task into segments based on sub-band classification. The UE processes and monitors PDCCH only in downlink sub-bands where control signals are actually transmitted, while skipping uplink sub-bands. This segmentation reduces computing resource consumption by eliminating unnecessary monitoring operations in uplink portions while preserving detection capability in relevant downlink sub-bands.
Solution Approach 2:
The patent extracts and removes the unnecessary monitoring operations from uplink sub-bands. By identifying uplink sub-bands through SBFD configuration, the UE takes out the PDCCH monitoring task from these sub-bands entirely, reducing computing resource consumption without affecting control signal detection capability in downlink sub-bands where monitoring is still performed.
3Use of energy by moving object
If the UE refrains from monitoring the PDCCH during uplink sub-bands, then the power consumption is reduced, but the monitoring coverage is narrowed
Solution Approach 1:
The patent applies local quality by making the monitoring behavior sub-band specific rather than uniform across the entire spectrum. The UE refrains from monitoring in uplink sub-bands (where no downlink control signals are transmitted) while maintaining monitoring in downlink sub-bands (where control signals are present). This local differentiation reduces power consumption without narrowing effective monitoring coverage, as the UE monitors all relevant downlink portions.
Data Source
AI summary
A user equipment (UE) receives a configuration for sub-band full duplex (SBFD) comprising one or more of downlink (DL) sub-bands, uplink (UL) sub-bands. The UE refrains from monitoring a physical downlink control channel (PDCCH) during a duration associated with an UL sub-band based at least in part on the received configuration for SBFD.