Sidelink Synchronization Mapping for Network Energy Saving Modes

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Solution Overview

Problem

Existing wireless communication systems lack efficient mechanisms for sidelink synchronization in network energy saving modes, which can lead to inefficiencies and interference in device-to-device communication.

Innovation Solution

Implementing a mapping between network energy saving modes and priority rules for sidelink synchronization, allowing UEs and network nodes to perform synchronization based on scheduling and priority rules for efficient energy management.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Use of energy by moving object

If network energy saving modes are implemented, then energy consumption is reduced, but sidelink synchronization efficiency deteriorates

Engineering Contradiction:

Improvenetwork energy consumptionVSAvoidsidelink synchronization efficiency

Core Design Contradiction:

Use of energy by moving objectVSProductivity

Solution Approach 1:

The system dynamically adjusts sidelink synchronization parameters based on the current network energy saving mode. When energy saving mode is activated, the synchronization periodicity is adapted and priority rules are modified to maintain essential synchronization while reducing unnecessary signaling, thus resolving the contradiction between energy reduction and synchronization efficiency

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent changes key parameters of the sidelink synchronization process according to energy saving modes, including synchronization periodicity, resource allocation, and priority rules. By adjusting these parameters dynamically, the system achieves both energy reduction and maintained synchronization performance

Inventive Principle:

Principle #35Parameter changes

2Use of energy by moving object

If network energy saving modes are implemented, then energy consumption is reduced, but interference in device-to-device communication increases

Engineering Contradiction:

Improvenetwork energy consumptionVSAvoidinterference in device-to-device communication

Core Design Contradiction:

Use of energy by moving objectVSObject-affected harmful factors

Solution Approach 1:

The system applies different synchronization strategies to different UEs based on their specific conditions and the current energy saving mode. By customizing synchronization behavior locally for each UE rather than applying uniform rules, the system reduces interference while maintaining energy efficiency

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The network monitors sidelink communication quality and synchronization status, then adjusts energy saving mode parameters accordingly. This feedback mechanism ensures that when energy saving modes are active, the system can detect and mitigate interference issues that arise, balancing energy reduction with communication quality

Inventive Principle:

Principle #23Feedback

Data Source

PatentUS12408110B2Sidelink synchronization rules based on network energy saving mode

Publication Date: 2025.09.02 QUALCOMM INC

AI summary

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive a mapping indication that indicates a mapping between a plurality of network energy saving modes and a plurality of priority rules for sidelink synchronization. The UE may receive a network energy saving mode indication that indicates scheduling for one or more network energy saving modes of the plurality of network energy saving modes. The UE may perform sidelink synchronization in accordance with a priority rule of the plurality of priority rules for sidelink synchronization based at least in part on the scheduling for the one or more network energy saving modes and the mapping between the plurality of network energy saving modes and the plurality of priority rules for sidelink synchronization. Numerous other aspects are described.