Sidelink BWP Timer Alignment With DRX Active States

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Solution Overview

Problem

Existing wireless communication systems face challenges in efficiently managing sidelink bandwidth parts (BWPs) due to the lack of a systematic approach based on the timing of sidelink discontinuous reception (DRX) active states, leading to suboptimal resource utilization and power consumption.

Innovation Solution

Implementing a sidelink BWP timer with a duration based on the timing of sidelink DRX active states to switch to a first sidelink BWP for an appropriate duration, optimizing resource allocation and power management.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If sidelink BWP timer is not aligned with DRX active state timing, then resource utilization is inefficient and power consumption is high, but implementing alignment requires systematic timer management based on DRX timing

Engineering Contradiction:

Improveresource utilizationVSAvoidtimer management complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The system pre-configures the sidelink BWP timer duration based on DRX active state timing parameters before operation. This preliminary configuration ensures that BWP switching automatically aligns with DRX active states without requiring complex real-time adjustments, thereby improving resource utilization while maintaining manageable system complexity.

Inventive Principle:

Principle #10Preliminary action

2Loss of energy

If sidelink BWP timer duration is extended to cover DRX active state, then power consumption increases due to prolonged resource allocation, but shorter duration may miss communication opportunities

Engineering Contradiction:

Improvepower consumptionVSAvoidcommunication reliability

Core Design Contradiction:

Loss of energyVSReliability

Solution Approach 1:

The sidelink BWP timer duration is dynamically configured to match the DRX active state timing characteristics. This dynamic alignment ensures that the BWP remains active precisely during periods when communication is expected, avoiding both premature deactivation that would miss communications and extended activation that would waste power, thereby optimizing the trade-off between power consumption and communication reliability.

Inventive Principle:

Principle #15Dynamics

3Loss of energy

If systematic BWP timer management based on DRX timing is implemented, then resource utilization improves and power consumption reduces, but implementation complexity increases

Engineering Contradiction:

Improvepower consumptionVSAvoidimplementation complexity

Core Design Contradiction:

Loss of energyVSDevice complexity

Solution Approach 1:

The system manages complexity by configuring the sidelink BWP timer using DRX timing parameters (such as drx-OnDurationTimer or drx-InactivityTimer values) that are already established in the wireless communication system. This parameter-based configuration approach leverages existing DRX timing structures, avoiding the need for entirely new timer management mechanisms and thereby reducing implementation complexity while achieving power optimization.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS12414041B2Sidelink bandwidth part timer based on active state

Publication Date: 2025.09.09 QUALCOMM INC

AI summary

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a first user equipment (UE) may start a sidelink bandwidth part (BWP) timer with a duration that is based at least in part on a timing of a sidelink discontinuous reception active state of the first UE. The first UE may switch to a first sidelink BWP for the duration of the sidelink BWP timer. Numerous other aspects are described.