Directional UE Beam Sweeping Using Base Station Location
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Solution Overview
Problem
Existing beamforming methods in NTN and ATG environments require efficient beam sweeping techniques to maintain communication quality, especially in high-frequency bands beyond 100 GHz, which is challenging due to the dynamic nature of satellite and terminal movements.
Innovation Solution
Determine the approximate beam direction based on the location of the base station or satellite and perform beam sweeping accordingly to optimize communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If beam sweeping is performed in NTN or ATG environments with satellite or terminal movement, then communication coverage is improved, but beam alignment accuracy deteriorates due to dynamic position changes
Solution Approach 1:
The patent applies preliminary action by pre-determining the approximate beam direction based on initial location information of the satellite or base station and terminal before actual beam sweeping. This preliminary beam direction calculation allows the system to prepare beamforming parameters in advance, reducing the time and complexity required for beam alignment during dynamic movement. The terminal or network device uses this pre-calculated direction as a starting point for beam sweeping, improving both coverage and alignment accuracy in NTN and ATG environments.
2Reliability
If beam sweeping is performed to maintain communication quality in high-frequency bands, then signal reliability is improved, but time consumption increases due to dynamic movements
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting beamforming parameters based on updated location information of the satellite or base station and terminal. Instead of performing complete beam sweeping whenever movement occurs, the system modifies beam direction, gain, and other parameters according to the magnitude and direction of movement. This selective parameter adjustment maintains communication quality in high-frequency bands while significantly reducing the time consumption compared to full beam sweeping procedures.
3Reliability
If beamforming is used in high-frequency bands beyond 100 GHz, then signal transmission quality is improved, but system complexity increases due to dynamic tracking requirements
Solution Approach 1:
The patent applies self-service by enabling the terminal to autonomously determine its own location and use this information for beamforming adjustments. The terminal independently calculates beam direction based on its location and the satellite or base station position, reducing the need for complex network-side tracking and control mechanisms. This self-service approach maintains signal transmission quality in high-frequency bands while simplifying the overall system complexity by distributing the tracking burden to the terminal device.
Data Source
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AI summary
One disclosure of the present disclosure provides a method by which UE performs communication. The method comprises the steps of: transmitting, to a serving base station, capability of the UE; wherein the capability includes information that an antenna of the UE is a directional antenna, receiving, from the serving base station, information on location of a specific base station; determining N candidate beams, based on the location of the specific base station; performing beam sweeping on the N candidate beams.