D2D Signal Detection Timing Adjustment via Timing Advance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In conventional D2D communication systems, the detection of device-to-device signals by user equipment often fails due to the reliance on timing advances determined by base stations, which do not account for the distance between user equipment, leading to inaccurate signal detection.
Innovation Solution
A method where user equipment receives a message containing a timing advance, determines a reference time from a received reference signal, and uses both to accurately detect device-to-device signals, improving detection success rates by considering the specific timing and reference signals from base stations or other user equipment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the user equipment determines the detection time according to the reference signal sent by the base station, then the timing is simplified and easy to implement, but the detection accuracy deteriorates because it does not account for the distance between user equipments
Solution Approach 1:
The transmitting user equipment sends its timing advance value in advance before the detecting user equipment performs signal detection. This allows the detecting equipment to pre-calculate the correct detection time by adding the timing advance to the reference time, ensuring accurate synchronization without complicating the overall timing mechanism.
Solution Approach 2:
The timing advance value acts as an intermediary parameter that bridges the base station's reference timing and the actual D2D signal transmission timing. It conveys the distance-related timing adjustment information from the transmitting UE to the detecting UE, enabling accurate detection while maintaining the base station's centralized timing control.
2Extent of automation
If the user equipment uses the timing advance determined by the base station for D2D signal detection, then the system maintains centralized control, but the detection fails because the timing advance does not account for D2D distance factors
Solution Approach 1:
Each user equipment uses its own timing advance value (or the other UE's timing advance) to adjust the detection timing locally. This allows the timing to be adapted to the specific D2D communication scenario between particular UEs, while the base station maintains overall system control through the reference signal timing.
Solution Approach 2:
The transmitting user equipment communicates its timing advance value to the detecting equipment in advance, allowing the detecting equipment to pre-determine the correct detection time. This preliminary information exchange enables reliable detection while preserving the base station's centralized timing framework.
3Device complexity
If the user equipment does not consider the distance between user equipments for timing determination, then the system complexity is reduced, but the detection success rate deteriorates
Solution Approach 1:
Each user equipment uses its own timing advance value (obtained from the base station) to determine when to expect signals from other UEs. This self-service approach allows UEs to autonomously calculate detection times based on their individual timing relationships with the base station, improving detection success without adding system complexity.
Solution Approach 2:
The system changes the timing parameter from a fixed reference time to a dynamic detection time calculated by adding the timing advance to the reference time. This parameter adjustment accounts for distance-related timing differences between UEs while maintaining the simplicity of the base station's reference signal timing.
Data Source
Figure 1~2
Figure 3~4
Figure 5~7
AI summary
The present invention discloses a method for detecting a device-to-device signal, a user equipment, and a base station. The method includes: receiving a first message; determining, according to the first message, a first timing advance for a first user equipment to detect a D2D signal sent by a second user equipment; determining a reference time according to a received reference signal; determining, according to the first timing advance and the reference time, a first time for detecting the D2D signal; and detecting the D2D signal at the first time. According to the method for detecting a device-to-device signal, the user equipment, and the base station in embodiments of the present invention, a time for detecting a D2D signal may be determined by receiving a timing advance and a reference time, so that when the user equipment detects the D2D signal at the time, a D2D signal detection success rate can be improved.