Anchor-Based PDCCH Skipping Until Nominal Data Arrival

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing wireless communication systems have limited PDCCH skipping durations, insufficient for UEs not configured for connected mode discontinuous reception (CDRX), which restricts the ability to skip PDCCH monitoring until a nominal data arrival time, leading to suboptimal power savings.

Innovation Solution

Introduce an anchor for PDCCH skipping that indicates time-domain occasions, allowing UEs to skip PDCCH monitoring until a future nominal pseudo-periodic data arrival time, enhancing power savings by enabling sleep mode until then.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If PDCCH skipping is implemented with limited duration options, then the system complexity is reduced, but the power saving capability for UEs not configured for CDRX is insufficient

Engineering Contradiction:

ImprovePDCCH skipping duration configurationVSAvoidpower saving capability

Core Design Contradiction:

Device complexityVSUse of energy by moving object

Solution Approach 1:

The patent introduces dynamic PDCCH skipping durations that can be flexibly adjusted based on UE configuration and traffic patterns. Instead of fixed duration options, the system dynamically determines skipping durations using formulas that consider CDRX parameters, enabling adaptive power saving for both CDRX-configured and non-CDRX UEs without requiring complex reconfiguration procedures.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent changes the parameter representation from discrete duration values to continuous time-based calculations using CDRX parameters (drx-OnDuration, drx-InactivityTimer, drx-SlotOffset, etc.). This allows the PDCCH skipping duration to be precisely tailored to each UE's specific configuration and traffic characteristics, significantly improving power saving capability while maintaining system simplicity.

Inventive Principle:

Principle #35Parameter changes

2Reliability

If PDCCH monitoring is continuously performed, then the reliability of data reception is maintained, but the power consumption increases

Engineering Contradiction:

Improvedata reception reliabilityVSAvoidpower consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The patent implements periodic PDCCH monitoring patterns based on CDRX cycle structures. UEs perform PDCCH monitoring at regular intervals defined by drx-OnDuration and drx-InactivityTimer parameters, allowing the device to enter low-power states between monitoring occasions. This periodic approach maintains data reception reliability by ensuring timely detection of scheduling assignments while significantly reducing average power consumption compared to continuous monitoring.

Inventive Principle:

Principle #19Periodic action

Solution Approach 2:

The patent enables UEs to skip PDCCH monitoring during predetermined low-activity periods by calculating skipping durations based on CDRX parameters and traffic patterns. The UE can rush through inactive time periods without monitoring PDCCH, then resume monitoring when data activity is expected, thereby maintaining reliability for actual data transmissions while eliminating unnecessary power consumption during idle periods.

Inventive Principle:

Principle #21Skipping (Rushing through)

3Adaptability or versatility

If the number of PDCCH skipping duration options is increased, then the adaptability to different traffic patterns is improved, but the device complexity increases

Engineering Contradiction:

Improvetraffic pattern adaptabilityVSAvoidskipping duration configuration

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent creates a universal PDCCH skipping mechanism that works for both CDRX-configured and non-CDRX UEs using a unified mathematical framework. The same set of CDRX parameters serves multiple functions: defining DRX behavior, determining skipping durations, and adapting to various traffic patterns. This eliminates the need for separate configuration sets for different UE types, achieving high adaptability while maintaining low device complexity.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The patent transforms the approach from selecting from discrete duration options to calculating continuous durations using CDRX parameters. By changing the parameter representation and using mathematical relationships between CDRX timing parameters, the system achieves fine-grained adaptability to different traffic patterns without requiring multiple pre-defined duration options, thus avoiding complexity increases.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS12452862B2Physical downlink control channel skipping based on an anchor and an indication

Publication Date: 2025.10.21 QUALCOMM INC

AI summary

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, an UE may receive information indicating an anchor for performing physical downlink control channel (PDCCH) skipping, the anchor indicating time-domain occasions based at least in part on which PDCCH skipping is to be performed. The UE may receive an indication to perform PDCCH skipping. The UE may perform PDCCH skipping based at least in part on the anchor and based at least in part on receiving the indication. Numerous other aspects are described.