Sidelink Beam Management for mmWave V2X
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Solution Overview
Problem
The high propagation loss in millimeter wave (mmWave) and terahertz (THz) bands poses challenges for maintaining communication range in V2X sidelink systems, necessitating efficient beam management to compensate for these losses.
Innovation Solution
The method involves detecting spatial information from sensed scheduling information, selecting a resource and beam direction for data transmission based on this information, and transmitting second scheduling information that includes the selected resource and beam direction for efficient data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If directional antenna systems are used to compensate for propagation losses in mmWave/THz bands, then communication range is maintained, but beam management complexity increases
Solution Approach 1:
The patent applies preliminary action by having the transmitting UE sense and detect spatial information in advance before data transmission. The UE detects beam directions and spatial characteristics of other UEs beforehand, stores this spatial information, and uses it to pre-determine optimal beam directions for data transmission. This advance preparation eliminates the need for complex real-time beam management during actual data transmission, thus maintaining communication range while reducing beam management complexity.
Solution Approach 2:
The patent implements self-service by enabling UEs to autonomously sense, detect, and determine their own beam directions without requiring network assistance. Each UE independently performs spatial sensing, detects beam information from scheduling messages, and selects appropriate beam directions for transmission. This autonomous beam management approach maintains communication effectiveness while significantly reducing the complexity burden on the network infrastructure.
2Productivity
If beam directions are selected based on spatial multiplexing, then data transmission efficiency is improved, but resource selection complexity increases
Solution Approach 1:
The patent applies preliminary action by having UEs sense and detect spatial information and beam directions in advance before data transmission occurs. The transmitting UE detects beam directions from scheduling information, determines spatial multiplexing opportunities beforehand, and selects optimal resources and beam directions in advance. This pre-determination simplifies the resource selection process during actual transmission, improving data transmission efficiency while reducing real-time selection complexity.
Solution Approach 2:
The patent implements feedback mechanisms where UEs detect beam directions and spatial information from scheduling messages transmitted by other UEs. This feedback loop allows each UE to learn about the spatial usage patterns of other UEs and adjust its resource and beam selection accordingly. The feedback mechanism enables efficient spatial multiplexing while simplifying the decision-making process through information gathering from the environment.
Data Source
AI summary
Embodiments of the present application are directed to a method and apparatus for beam-based transmission for sidelink. The method may include: detecting spatial information contained in first sensed scheduling information; selecting a resource and a direction of a beam for data transmission based on the detected spatial information; transmitting second scheduling information including the selected resource and spatial information of the beam for the data transmission, where the spatial information of the beam includes the direction of the beam for the data transmission; and transmitting the data transmission by using the selected resource and the direction of the beam.