D2D Synchronization Signal Control via Reception Strength Thresholds
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing synchronization signals for Device-to-Device (D2D) communication, leading to traffic overload and limited communication range, which hinders the distribution of traffic away from base stations and restricts the potential of new communication services.
Innovation Solution
A method and apparatus that involve searching for a first synchronization signal, comparing its reception signal strength with a threshold value, and determining whether to transmit a second synchronization signal based on specific conditions such as probability, synchronization signal searching count, or additional searching time, to efficiently manage synchronization in D2D communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If devices transmit independent synchronization signals in D2D communication, then synchronization reliability is improved, but traffic load on base stations increases
Solution Approach 1:
The patent segments the synchronization function by allowing multiple devices to independently transmit synchronization signals rather than relying on a single base station. This distributes the synchronization responsibility across multiple nodes, improving reliability while reducing base station traffic load.
Solution Approach 2:
Devices in the D2D network perform self-synchronization by autonomously transmitting and detecting synchronization signals without requiring base station coordination. This self-service mechanism eliminates the need for base station involvement in synchronization, reducing traffic load while maintaining reliability.
2Measurement precision
If devices search for synchronization signals extensively, then synchronization accuracy is improved, but communication time is increased
Solution Approach 1:
The patent implements periodic synchronization signal transmission and detection, where devices transmit synchronization signals at regular intervals and perform detection at scheduled times. This periodic approach ensures accurate synchronization while limiting the time spent on synchronization activities.
Solution Approach 2:
Devices perform preliminary synchronization by detecting synchronization signals from other devices before establishing full D2D communication. This preliminary action enables quick synchronization without extensive searching, reducing communication setup time while maintaining accuracy.
Data Source
AI summary
The present invention relates to a method and apparatus for controlling a generation of synchronization signal in a wireless communication system that supports a device to device communication. The method includes searching a first synchronization signal for the D2D communication; comparing a reception signal strength of the searched first synchronization signal with a threshold value; and determining whether to transmit a second synchronization signal of the first UE according to a specific condition when the reception signal strength is smaller than the threshold value.