User Equipment Reception Transmission Overlap Prevention
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Solution Overview
Problem
In wireless communication systems, particularly during device-to-device (D2D) communication, there is a challenge in preventing overlap between data reception in one time period and data transmission in the subsequent period, leading to interference.
Innovation Solution
A method and apparatus that detect overlap between subframe reception and transmission by dropping one of the data reception or transmission in the subsequent subframe, prioritizing uplink transmissions to prevent interference, utilizing a D2D transmission gap and switch time to manage communication timing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a UE performs reception in subframe n and transmission in subframe n+1, then the UE can maintain continuous communication operations, but overlap occurs in the time domain causing interference between reception and transmission
Solution Approach 1:
The UE detects potential overlap between reception in subframe n and transmission in subframe n+1 in advance, and proactively drops one of the conflicting operations before the interference occurs. This preliminary detection and preventive dropping mechanism resolves the contradiction by maintaining continuous operations while avoiding harmful interference.
2Object-affected harmful factors
If the UE drops reception to prioritize transmission, then interference is reduced, but data reception reliability deteriorates
Solution Approach 1:
The invention changes the operational parameter by dynamically dropping either reception or transmission based on detected overlap conditions. This parameter change (selective dropping) resolves the contradiction by reducing interference when necessary while maintaining reception reliability through intelligent decision-making about which operation to drop.
3Productivity
If the UE uses DL timing for both receiving discovery signals and transmitting WAN data, then resource utilization is improved, but timing alignment complexity increases
Solution Approach 1:
The UE uses the same DL timing reference for both receiving discovery signals and transmitting WAN data, making the timing mechanism universal and multi-functional. This resolves the contradiction by improving resource utilization through unified timing while managing complexity through consistent timing application across different operations.
Data Source
Figure 1A
Figure 1B
Figure 2~3
AI summary
A communication method of a user equipment (UE) in a wireless communication system is provided. The method includes determining overlap in a time domain between data reception by the UE in a subframe and data transmission by the UE in an immediate subsequent subframe, and dropping, when the overlap is determined, one of the data reception in the subframe and the data transmission in the immediate subsequent subframe.