Wireless Device Synchronization Signal Selection and Forwarding
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Solution Overview
Problem
In device-to-device (D2D) communication networks, there is a need for a method to effectively select and forward synchronization signals among multiple received signals, ensuring reliable timing synchronization while preventing signal confusion and interference due to varying signal power and hop count constraints.
Innovation Solution
A wireless communication device receives synchronization signals, selects a reference signal based on power thresholds and priority rules, and forwards it if it meets specific power and hop count constraints, acting as an independent synchronization source if signals are too weak, and updates timing information to maintain signal reliability and prevent interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a D2D device receives multiple synchronization signals simultaneously, then the device can potentially achieve better coverage and reliability, but signal confusion and interference occur due to varying signal power and hop count constraints
Solution Approach 1:
The patent segments the synchronization signal reception process into distinct stages: signal power evaluation, threshold comparison, priority-based selection, and conditional forwarding. By dividing the complex multi-signal processing into sequential decision steps, the device can reliably select one reference synchronization signal while ignoring others, thus preventing signal confusion and interference.
Solution Approach 2:
The patent introduces key parameters including signal power threshold, priority rules, and hop count constraints to differentiate and select among multiple synchronization signals. By changing and comparing these parameters, the device can identify the strongest valid signal and synchronize to it, improving reliability while preventing interference from weaker or invalid signals.
2Area of stationary object
If the device forwards synchronization signals freely to extend coverage, then the coverage area increases, but signal power constraints are violated leading to unreliable synchronization
Solution Approach 1:
The patent applies preliminary action by evaluating signal power against a threshold and checking hop count constraints before forwarding any synchronization signal. This pre-validation ensures that only signals meeting power and reliability criteria are forwarded, allowing coverage extension while maintaining synchronization reliability.
Solution Approach 2:
The patent introduces an intermediary forwarding mechanism that acts as a gatekeeper between the reference synchronization signal and other devices. The forwarding criterion (power constraint and hop count constraint) serves as a mediator to filter and validate signals, ensuring that coverage extension does not compromise synchronization reliability.
3Stability of the object's composition
If the device selects a synchronization signal with lower power to maintain diversity, then signal robustness may improve, but timing synchronization accuracy deteriorates
Solution Approach 1:
The patent uses signal power as a key parameter for selection, establishing a threshold that ensures only sufficiently strong signals are chosen as reference. By setting and comparing this parameter, the device maintains timing synchronization accuracy while the priority rule and hop count constraint provide additional layers of robustness against signal quality variations.
Solution Approach 2:
The patent segments the signal selection criteria into multiple independent checks: power threshold evaluation, priority rule application, and hop count validation. This segmentation allows the system to prioritize strong signals for accuracy while using the combined criteria to ensure overall robustness, rather than relying on a single potentially conflicting parameter.
Data Source
AI summary
A method for receiving and transmitting synchronization signal is provided. The method is applicable to a wireless communication device. The wireless communication device has a local timing. The method includes the following steps. Receive at least one synchronization signal. If a signal power of at least one of the at least one synchronization signal is greater than or equal to a signal power threshold, select one of the at least one synchronization signal as a reference synchronization signal according to a priority rule, and synchronize the local timing to the reference synchronization signal. If the signal power of each the synchronization signal is less than the signal power threshold, send a local synchronization signal according to the local timing. If the reference synchronization signal meets a forwarding criterion, forward the reference synchronization signal, wherein the forwarding criterion includes a power constraint and a hop count constraint.