D2D Synchronization Signal Reception and Conflict Management
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In device-to-device (D2D) communication systems, devices often experience desynchronization due to varying propagation delays and signal priorities, leading to reduced communication efficiency and potential loss of synchronization, especially in scenarios involving multiple synchronization sources with equal priority levels.
Innovation Solution
A method where devices receive synchronization signals and associated information from multiple initial synchronization sources, allowing them to determine synchronization references, manage synchronization conflicts, and optimize the use of synchronization sources by identifying synchronization IDs and timing differences to maintain stable synchronization, even when sources have equal priority.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If devices synchronize based on the strongest signal or highest priority source, then synchronization speed is improved, but synchronization stability deteriorates due to signal fluctuations and propagation delays
Solution Approach 1:
The patent implements feedback mechanisms where devices continuously monitor synchronization signal strength, timing differences, and source priorities. Devices adjust their synchronization behavior based on this feedback, switching between sources dynamically to maintain stable synchronization while adapting to changing channel conditions and signal qualities.
Solution Approach 2:
The patent introduces dynamic synchronization source selection where devices can switch between primary and secondary synchronization sources based on real-time conditions. This dynamic approach allows the system to adapt to signal fluctuations and propagation delays, maintaining synchronization stability while preserving fast synchronization capability when conditions are favorable.
2Reliability
If devices use multiple synchronization sources, then synchronization reliability is improved, but device complexity increases due to conflict management
Solution Approach 1:
The patent changes the parameter of synchronization source identification by introducing explicit synchronization source IDs in synchronization messages. This allows devices to identify and track multiple synchronization sources efficiently, managing conflicts through parameter comparison rather than complex signal analysis, thereby reducing device complexity while maintaining reliability.
Solution Approach 2:
The patent introduces synchronization source ID as an intermediary parameter that mediates between multiple synchronization sources. This intermediary enables devices to manage multiple sources systematically by comparing IDs and timing information, simplifying the conflict resolution process while maintaining synchronization reliability across diverse sources.
3Measurement precision
If devices synchronize to the nearest base station or strongest signal, then synchronization accuracy is improved, but adaptability deteriorates when sources have equal priority or signals are weak
Solution Approach 1:
The patent segments the synchronization source selection process into multiple levels: primary sources (base stations, GNSS) and secondary sources (other devices). This segmentation allows devices to maintain high synchronization accuracy when primary sources are available while adapting to use secondary sources when needed, thereby improving adaptability without sacrificing accuracy in optimal conditions.
Solution Approach 2:
The patent makes the synchronization system universal by enabling devices to function as both primary and secondary synchronization sources depending on conditions. This multi-functionality allows the system to adapt to various scenarios including weak signals and equal-priority sources, while maintaining synchronization accuracy through the established priority framework and timing reference mechanisms.
Data Source
AI summary
Method implemented by a device for receiving synchronization data in a device-to-device communication system, said method comprising: receiving a first synchronization signal and a first information associated to a first initial synchronization source, such as the first synchronization signal is either an initial synchronization signal emitted by the first initial synchronization source or a synchronization signal emitted by another device which is synchronized based on the first initial synchronization sources; receiving a second synchronization signal and a second information associated to a second initial synchronization source, such as the second synchronization signal is either an initial synchronization signal emitted by the second initial synchronization source or a synchronization signal emitted by another device which is synchronized based on the second initial synchronization sources.