Sidelink DRX Active Time Alignment for Resource Selection

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Solution Overview

Problem

In Sidelink communication systems, the dynamic nature of packet arrival causes a mismatch between partial sensing patterns and DRX active times, leading to ineffective resource selection and reselection due to missed Sidelink Control Information during partial sensing windows.

Innovation Solution

A method and apparatus that obtain and align multiple active times within a configuration, allowing for resource determination and selection based on sensing results during overlapping active and sensing times, ensuring that resources can be effectively used for both receiving and sending.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Use of energy by moving object

If partial sensing is introduced to save power, then power consumption is reduced, but resource selection reliability deteriorates due to mismatch between sensing window and active time

Engineering Contradiction:

Improvepower consumptionVSAvoidresource selection reliability

Core Design Contradiction:

Use of energy by moving objectVSReliability

Solution Approach 1:

The patent makes the sensing window dynamic by allowing it to move within the active time window based on packet arrival patterns. The sensing window position is adjusted dynamically to match the actual active time when packets arrive, ensuring reliable sensing while maintaining power savings through selective activation.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent changes the timing parameters of the sensing window to align with the active time window. By adjusting the sensing window position and duration based on DRX active time configuration, the system ensures that sensing operations occur only when the terminal is actively receiving, thus maintaining reliability while saving power.

Inventive Principle:

Principle #35Parameter changes

2Use of energy by moving object

If DRX is used to control SL sending and receiving, then power consumption is reduced, but sensing and resource selection cannot be implemented normally due to timing mismatch

Engineering Contradiction:

Improvepower consumptionVSAvoidsensing and resource selection implementation

Core Design Contradiction:

Use of energy by moving objectVSEase of operation

Solution Approach 1:

The patent performs preliminary configuration of the sensing window position based on expected packet arrival patterns and DRX active time. By pre-aligning the sensing window with the active time window before actual sensing operations, the system ensures that sensing can be properly implemented without requiring complex real-time adjustments, thus maintaining ease of operation while saving power.

Inventive Principle:

Principle #10Preliminary action

3Loss of energy

If partial sensing window is positioned outside active time, then power savings are maintained, but Sidelink Control Information cannot be received and sensing fails

Engineering Contradiction:

Improvepower savingsVSAvoidSidelink Control Information reception

Core Design Contradiction:

Loss of energyVSLoss of information

Solution Approach 1:

The patent makes the sensing window position dynamic relative to the active time window. Instead of using a fixed sensing window position, the system adjusts the sensing window to always fall within the active time window when packets are expected to arrive, ensuring that Sidelink Control Information can be received while maintaining power savings during inactive periods.

Inventive Principle:

Principle #15Dynamics

Data Source

PatentUS20230189144A1Processing method and apparatus

Publication Date: 2023.06.15 VIVO MOBILE COMM CO LTD

AI summary

A processing method and apparatus are provided. The method includes: obtaining a first configuration, where the first configuration includes one or more active times.