Dual-Link Wireless Transmission Timing With Offset-Based Synchronization
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Solution Overview
Problem
In wireless communication systems, synchronization among multiple nodes is challenging due to inconsistent synchronization reference sources, leading to interference and reduced resource efficiency, especially in scenarios with varying transmission delays and geographical locations, which complicates system design and resource coordination.
Innovation Solution
A method for wireless communications that involves receiving and transmitting signaling to determine synchronization information for sidelinks based on factors like transmission delays and local compensation, using indices and time offsets to ensure consistent synchronization across different communication scenarios.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If different synchronization reference sources are used by multiple nodes, then each node can independently determine synchronization, but synchronization consistency among nodes deteriorates
Solution Approach 1:
The patent introduces a base station as an intermediary that receives timing information from multiple synchronization reference sources (GPS, GNSS, or other base stations) and processes this information to generate unified timing advance values for UEs. This intermediary role resolves the contradiction by enabling nodes to use diverse reference sources while maintaining synchronization consistency through the base station's coordination.
Solution Approach 2:
The patent implements a feedback mechanism where the base station determines timing advance values based on received timing information and transmits these values to UEs. This feedback loop allows the system to continuously adjust and maintain synchronization consistency despite using multiple reference sources, resolving the contradiction between adaptability and reliability.
2Area of stationary object
If transmission delay is increased to accommodate distant communications, then geographical coverage is improved, but synchronization accuracy deteriorates
Solution Approach 1:
The patent applies preliminary action by having the base station determine timing advance values in advance based on received timing information before actual communication occurs. This allows the system to pre-compensate for transmission delays in distant communications, maintaining synchronization accuracy even as geographical coverage is expanded.
Solution Approach 2:
The patent changes the parameter of timing advance values dynamically based on the specific timing information received from different reference sources and transmission conditions. By adjusting this parameter in response to varying delays and reference sources, the system maintains synchronization accuracy across different geographical distances.
3Adaptability or versatility
If multiple nodes are involved in communication, then system versatility is improved, but synchronization coordination complexity increases
Solution Approach 1:
The patent segments the synchronization coordination function by assigning the base station the specific responsibility of determining timing advance values, while UEs handle their own transmission based on received timing information. This segmentation reduces the overall coordination complexity by dividing tasks among specific nodes with clear responsibilities.
Solution Approach 2:
The patent makes the base station serve multiple functions: receiving timing information from various reference sources, processing this information to determine timing advance values, and transmitting these values to multiple UEs. This multi-functionality simplifies the overall system by consolidating synchronization coordination tasks in a single node.
Data Source
AI summary
A method for wireless communications. A first node receives a first signaling and a second signaling and transmits a first radio signal in a first slot. The first signaling is used for indicating a first time window, and an index for the first slot in the first time window is a first index. The second signaling is used for determining a first time offset. When the first radio signal is transmitted in a mainlink, the first index is used for generating the first radio signal, and when the first radio signal is transmitted in a sidelink, the second index is used for generating the first radio signal, the second index being related to both the first time offset and the first index. By adjusting and optimizing timing relations between different nodes by different indexes, the present method prevents interferences and increases efficiency.