Sidelink Beam Pairing Using Feedback to Cut mmWave Delay
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Solution Overview
Problem
The challenge in wireless communication systems is determining an effective method for a terminal to establish a pair of transmission and reception beams for direct communication between devices, particularly in sidelink scenarios, which is crucial for improving communication quality and reducing delay.
Innovation Solution
A method is provided for determining a transmission beam by efficient signaling between transmitting and receiving user equipment (UEs) in millimeter wave bands, adjusting the beam pair to enhance communication quality and reduce delay.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If beam search or beam transmission is performed in wireless communication system, then communication quality can be improved, but communication delay increases due to the complexity of beam determination procedures
Solution Approach 1:
The transmitting UE performs beam sweeping and determines multiple candidate transmission beams in advance before actual data transmission. The beam-related information including candidate beams and their qualities is prepared and stored beforehand, allowing the receiving UE to efficiently select the best beam without performing extensive beam search during data transmission, thus reducing communication delay while maintaining quality
Solution Approach 2:
The receiving UE measures the quality of reference signals transmitted on different candidate beams and provides feedback information to the transmitting UE. This feedback mechanism enables the transmitting UE to identify the optimal transmission beam based on actual channel conditions, improving communication quality while avoiding exhaustive beam search procedures
2Loss of time
If efficient signaling is implemented for beam pairing, then communication delay is reduced, but signaling complexity between UEs increases
Solution Approach 1:
The patent combines multiple pieces of beam-related information including candidate transmission beams, their qualities, and timing information into a single signaling message structure. This merging approach allows the transmitting and receiving UEs to exchange comprehensive beam pairing information in one efficient signaling interaction, reducing the number of separate signaling exchanges and overall communication delay while managing complexity through structured information consolidation
Data Source
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AI summary
Disclosed is a method for a first terminal determining a transmission beam in a wireless communication system supporting a sidelink. Specifically, the method may comprise: receiving beam-associated information from a second terminal; and on the basis of the beam-associated information, determining a transmission beam for the second terminal. Particularly, the beam-associated information may include: a beam index; and a time resource index for the beam index.