Sidelink DRX Adaptation via SCI Decoding

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Solution Overview

Problem

Current wireless communication technologies, such as 5G NR and LTE, face inefficiencies in sidelink communication due to differing discontinuous reception (DRX) patterns among user equipment (UEs), leading to resource wastage and utilization inefficiency when UEs have different DRX configurations.

Innovation Solution

A method and apparatus for dynamically adapting a sidelink transmit DRX pattern of a first UE based on decoded sidelink control information (SCI) from other UEs, indicating time resources reserved for future transmission, allowing for synchronization and optimization of DRX patterns among multiple UEs.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If UEs use fixed DRX patterns independently, then each UE can operate autonomously and simplify device complexity, but resource utilization efficiency deteriorates due to mismatched transmission and reception windows

Engineering Contradiction:

ImproveDRX configuration complexityVSAvoidsidelink communication efficiency

Core Design Contradiction:

Device complexityVSProductivity

Solution Approach 1:

The patent implements feedback mechanisms where UEs exchange DRX pattern information through sidelink control information (SCI) and higher layer signaling. Receiving UEs provide feedback about their DRX configurations to transmitting UEs, enabling dynamic adaptation of transmission schedules to match receiver availability, thus resolving the contradiction between autonomous operation and resource efficiency

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The patent enables dynamic DRX pattern adaptation where transmitting UEs adjust their DRX configurations based on received feedback from receiving UEs. This dynamic adjustment allows the system to transition from static, independent DRX patterns to coordinated, adaptive patterns that optimize resource utilization while maintaining operational autonomy

Inventive Principle:

Principle #15Dynamics

2Reliability

If UEs wake up frequently to check for transmissions, then communication reliability improves, but power consumption increases

Engineering Contradiction:

Improvesidelink communication reliabilityVSAvoidUE power consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The patent applies preliminary action by having UEs exchange DRX pattern information and transmission schedule predictions in advance before actual data transmissions occur. This allows receiving UEs to wake up only during predicted transmission windows, ensuring reliable reception while minimizing unnecessary wake-ups and reducing power consumption

Inventive Principle:

Principle #10Preliminary action

3Reliability

If transmitting UEs use longer transmission windows, then data transmission reliability improves, but resource wastage increases when receiving UEs are in sleep mode

Engineering Contradiction:

Improvetransmission reliabilityVSAvoidtime resource wastage

Core Design Contradiction:

ReliabilityVSLoss of substance

Solution Approach 1:

The patent implements parameter changes by dynamically adjusting DRX pattern parameters (cycle length, on-duration, offset) based on exchanged feedback information. Transmitting UEs adapt their transmission windows to match receiving UEs' active periods, ensuring reliable delivery while minimizing resource wastage through optimized timing parameters

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS11832250B2Sensing based dynamic adaptation of sidelink transmit discontinuous reception (DRX) pattern

Publication Date: 2023.11.28 QUALCOMM INC

AI summary

Aspects of the present disclosure provide apparatus, methods, processing systems, and computer readable mediums for decoding, by a first user equipment (UE), a sidelink control information (SCI) from at least a second UE, the SCI indicating time resources reserved for future transmission to a third UE; and adapting a sidelink transmit discontinuous reception (DRX) pattern of the first UE based on the indicated time resources.