D2D Signal Reception Timing Window Adjustment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In device-to-device (D2D) communication, existing technologies face challenges in determining accurate transmission timing and establishing a suitable timing window for receiving D2D signals, especially when devices are in an idle state or lack synchronization with synchronization reference nodes.
Innovation Solution
A method is introduced where a second user equipment (UE) sets a time window to receive D2D signals based on the transmission timing determined by a first UE, which is calculated using signals from one or more synchronization reference nodes, employing a weighted average if multiple nodes are used, and adjusting the time window size accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If D2D UEs determine transmission timing using signals from multiple synchronization reference nodes, then synchronization accuracy is improved, but device complexity increases due to the need for weighted average calculations and multiple signal processing operations
Solution Approach 1:
The patent introduces synchronization reference nodes as intermediary elements that provide timing reference signals. These nodes act as mediators between the D2D UEs and the network, enabling UEs to determine transmission timing indirectly through received signals rather than direct network control, thus improving synchronization accuracy while managing complexity through standardized reference signal processing
2Measurement precision
If D2D UEs in idle state continuously monitor for timing signals, then synchronization accuracy is maintained, but power consumption increases
Solution Approach 1:
The patent implements periodic action by having UEs in idle state wake up at predetermined intervals to acquire timing information from synchronization reference nodes, then return to sleep mode. This periodic monitoring approach maintains synchronization accuracy by regularly updating timing information while significantly reducing power consumption compared to continuous monitoring
Solution Approach 2:
The patent applies preliminary action by having UEs acquire timing information in advance during idle periods before actual data transmission is needed. This allows UEs to prepare synchronization data beforehand, ensuring accurate timing is available when transmission occurs without requiring continuous active monitoring
3Reliability
If a larger timing window is used for receiving D2D signals, then reliability of signal reception is improved, but time efficiency deteriorates due to increased waiting time and reduced transmission speed
Solution Approach 1:
The patent implements dynamics by making the timing window size adjustable rather than fixed. The window size dynamically adapts based on the determined transmission timing and channel conditions, allowing the system to optimize between reliability and time efficiency by shrinking the window when timing is accurate and expanding it when timing uncertainty exists
Data Source
AI summary
One embodiment of the present invention relates to a method for a second terminal receiving, from a first terminal, a device-to-device (D2D) signal in a wireless communication system, and more specifically, to a method for receiving a D2D signal comprising the steps of: setting a time window for receiving the D2D signal; and receiving the D2D signal, wherein the D2D signal is transmitted according to a D2D signal transmission timing of the first terminal, which is determined by the first terminal based on a signal transmitted from a one or more timing reference nodes.