Location-Based Antenna Beam Selection for Fast RRC Connection Setup
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Solution Overview
Problem
In high-frequency radio communication systems beyond 52.6 GHz, the increased number of antenna beam combinations between radio base stations and terminals complicates the rapid selection of an optimal antenna beam due to varying locations and movements.
Innovation Solution
The radio base station and terminal utilize location information exchange to rapidly select appropriate antenna beams by determining the optimal transmission and reception directions based on terminal and base station location information, respectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the number of antenna beams is increased to support high-frequency communication beyond 52.6 GHz, then the communication capacity and coverage are improved, but the complexity of selecting the optimal antenna beam combination increases significantly
Solution Approach 1:
The system performs preliminary beam selection by the base station based on terminal location information before actual communication. The base station pre-determines the optimal transmission beam and notifies the terminal of the beam index, allowing the terminal to pre-configure its reception beam. This preliminary action reduces the real-time selection complexity from N×M combinations to much simpler decisions based on location data.
Solution Approach 2:
Location information serves as an intermediary that simplifies the beam selection process. Instead of directly evaluating N×M beam combinations, the system uses location information (latitude, longitude, altitude) as a mediator to determine the optimal beam directions. This intermediary reduces the search space and computational complexity significantly.
2Measurement precision
If the base station and terminal must instantaneously determine optimal antenna beams from many combinations, then the beam selection accuracy is improved, but the time required for connection establishment increases
Solution Approach 1:
The base station performs beam determination in advance using terminal location information and notifies the terminal of the selected beam index. This preliminary action allows both devices to prepare their beam configurations before actual data transmission begins, significantly reducing connection establishment time while maintaining high selection accuracy through location-based optimization.
Solution Approach 2:
The terminal uses the notified beam index from the base station to automatically configure its own reception beam without requiring complex real-time calculations. This self-service approach allows the terminal to rapidly adapt to the optimal beam configuration based on the base station's determination, reducing mutual adjustment time while maintaining accuracy.
3Speed
If the base station selects antenna beams based on terminal location information, then the speed of connection establishment is improved, but the requirement for location information processing and exchange increases
Solution Approach 1:
The system extracts only the essential location information (latitude, longitude, altitude) needed for beam determination, rather than processing complete terminal state data. This extraction approach reduces the information processing burden while providing sufficient data for accurate beam selection, improving connection speed without excessive complexity.
Solution Approach 2:
The system transforms physical location parameters (latitude, longitude, altitude) into beam selection parameters through predefined relationships and lookup tables. This parameter transformation simplifies the processing complexity by converting continuous location data into discrete beam index selections, enabling fast connection establishment with manageable processing requirements.
Data Source
AI summary
A BS (100) receives, from UE (200B), terminal location information indicating a location of the UE (200B). The BS (100) selects an antenna beam for the UE (200A) to be transmitted from the BS (100) based on the terminal location information.