Beam Selection Using UE Heading for SSB Transmission
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Solution Overview
Problem
Current beamforming techniques in wireless communications require extensive beam sweeping operations to determine the optimal beam pair between a base station and a user equipment (UE) device, leading to delays and inefficiencies due to the need for multiple iterations and CSI feedback.
Innovation Solution
The method involves determining an initial set of beams based on the UE's location and heading information, allowing for serial transmission of Synchronization Signal Blocks (SSB) signals. If the UE fails to receive the signal, a second set of beams is determined based on the UE's heading, enabling retransmission in a direction associated with the UE's heading.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If beam sweeping operations are performed to determine the optimal beam pair, then communication reliability is improved, but time delay and signaling overhead increase
Solution Approach 1:
The base station determines an initial set of beams based on UE location information before actual beamforming communication begins. This preliminary beam selection based on pre-acquired location data reduces the need for extensive beam sweeping operations, thereby decreasing time delay while maintaining communication reliability
Solution Approach 2:
Location information serves as an intermediary that bridges the base station and UE for initial beam selection. By using this intermediate data, the system avoids direct extensive beam sweeping between base station and UE, reducing signaling overhead and time delay while still achieving reliable beam pair determination
2Measurement precision
If multiple iterations of beam sweeping are performed, then beam selection accuracy is improved, but signaling overhead increases
Solution Approach 1:
The base station performs preliminary beam selection using UE location information before the actual beamforming process. This initial selection based on location data reduces the number of iterative beam sweeping operations needed, thereby reducing CSI feedback signaling overhead while maintaining sufficient beam selection accuracy
Solution Approach 2:
Instead of performing complete multiple iterations of beam sweeping, the system performs a partial action by selecting an initial set of beams based on location information. This partial approach achieves adequate beam selection accuracy without the excessive signaling overhead of full iterative beam sweeping
3Area of stationary object
If beam sweeping is performed in all directions, then coverage completeness is improved, but interference with neighboring UE devices increases
Solution Approach 1:
The base station focuses beamforming resources on specific directional beams determined by UE location information rather than uniformly sweeping all directions. This localized approach ensures coverage for target UEs while minimizing interference to neighboring UE devices in other directions
Solution Approach 2:
By preliminarily determining the set of beams to use based on UE location before actual transmission, the base station can concentrate energy in specific directions rather than broadcasting in all directions. This reduces unnecessary interference to neighboring devices while maintaining coverage completeness for the intended UEs
Data Source
AI summary
In some of the examples described herein, a base station determines, based on a location of a user equipment (UE) device, an initial set of one or more consecutive beams over which to transmit a Synchronization Signal Block (SSB) signal. The base station serially transmits the SSB signal to the UE device via the initial set of one or more consecutive beams. In response to failure of the UE device to successfully receive the SSB signal transmission via the initial set of one or more consecutive beams, the base station determines, based on heading information of the UE device, a second set of one or more consecutive beams over which to transmit the SSB signal. The base station serially transmits the SSB signal to the UE device via the second set of one or more consecutive beams in a direction associated with the heading information of the UE device.