Sidelink UE Power Saving State Management in V2X

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Solution Overview

Problem

There is a need for communication apparatuses and methods that enable sidelink user equipment (UE) to operate in a power saving state while balancing power saving with performance requirements, particularly for vulnerable road users and vehicles in V2X communication scenarios, where existing technologies do not clearly define how a SL UE should become power saving or balance power saving with performance.

Innovation Solution

The solution involves determining and configuring one of a plurality of power saving states for a communication apparatus, which includes circuitry to operate in different power saving modes, allowing the transceiver to transmit and/or receive sidelink signals accordingly, using RRC configuration parameters, MAC CE, new SCI fields, or new DCI formats to switch between power saving states, ensuring balanced power saving and performance.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Use of energy by moving object

If sidelink UE operates in traditional always-on mode, then communication performance and reliability are maintained, but power consumption increases significantly

Engineering Contradiction:

Improvepower consumptionVSAvoidcommunication performance

Core Design Contradiction:

Use of energy by moving objectVSReliability

Solution Approach 1:

The patent applies dynamics by enabling the UE to transition between different power saving states (e.g., first power saving state with enhanced power saving and second power saving state with normal power saving) based on communication needs. The UE can dynamically switch between these states using signaling mechanisms, allowing the system to adapt power consumption levels to actual communication requirements rather than maintaining a fixed always-on mode.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent changes operational parameters by defining multiple power saving states with different reception capabilities and power consumption characteristics. The system modifies parameters such as reception capability, power saving level, and state transition conditions to balance between power consumption and communication performance based on current operational needs.

Inventive Principle:

Principle #35Parameter changes

2Reliability

If UE implements comprehensive reception capability for all sidelink signals, then communication reliability is improved, but power saving capability deteriorates

Engineering Contradiction:

Improvecommunication reliabilityVSAvoidpower saving capability

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The patent segments the reception capability into different levels by defining multiple power saving states. In the first power saving state, the UE has limited reception capability (e.g., only for essential signals), while in the second power saving state, the UE has comprehensive reception capability. This segmentation allows the system to match reception capability with actual needs, improving both power saving and reliability where necessary.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent applies partial action by enabling the UE to operate with limited reception capability in the first power saving state, receiving only essential sidelink signals needed for basic operation. When more comprehensive reception is required, the UE transitions to the second power saving state. This partial action approach reduces power consumption when full capability is not needed while maintaining reliability when required.

Inventive Principle:

Principle #16Partial or excessive action

3Use of energy by moving object

If UE switches frequently between power saving states, then power saving optimization is achieved, but system complexity increases

Engineering Contradiction:

Improvepower saving optimizationVSAvoidstate management complexity

Core Design Contradiction:

Use of energy by moving objectVSDevice complexity

Solution Approach 1:

The patent implements feedback mechanisms where the network can signal the UE to transition between power saving states based on communication conditions. The UE monitors its operational needs and can request state transitions when communication requirements change. This feedback-based approach enables optimized power saving while managing complexity through structured state transition protocols.

Inventive Principle:

Principle #23Feedback

Data Source

PatentUS20240314692A1Communication apparatuses and communication methods for operating in a power saving state

Publication Date: 2024.09.19 PANASONIC INTELLECTUAL PROPERTY CORP OF AMERICA

AI summary

The present disclosure provides communication apparatuses and communication methods for operating in a power saving state. The communication apparatuses comprising circuitry, which in operation, determines one of a plurality of power saving states to operate in; and a transceiver, which in operation, transmit and/or receive at least one type of sidelink signals in response to determining the one of the plurality of power saving states.