Beamforming Base Station Angle of Arrival Scheduling
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Solution Overview
Problem
Wireless network base stations face challenges with radio frequency interference, leading to reduced data bandwidth and service interruptions due to sector-oriented designs, which disperse energy and reduce Signal to Noise Ratio (SNR), and require costly radio planning and optimization.
Innovation Solution
A beamforming base station transmits independent data streams to User Equipment (UE) in concentrated beams directed based on the UE's transmitter signal Angle of Arrival, estimated from signals received by spatially separated antennas, reducing interference and optimizing transmission scheduling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If sector-oriented base station design is used to cover wide area, then coverage area is improved, but Signal to Noise Ratio (SNR) deteriorates due to energy dispersion
Solution Approach 1:
The base station divides the wide coverage area into multiple directional beams, each targeting a specific spatial sector. Instead of transmitting energy uniformly across the entire coverage area, the system segments the transmission into focused directional beams, thereby maintaining high SNR in each beam while collectively covering the wide area.
Solution Approach 2:
The base station applies different transmission characteristics to different spatial locations by directing focused beams only where User Equipment is detected. Each beam delivers concentrated energy locally to its target direction, improving SNR in specific regions while maintaining overall wide area coverage through multiple directed beams.
2Measurement precision
If concentrated beams are used to improve SNR and data bandwidth, then Signal to Noise Ratio is improved, but radio frequency interference with other base stations increases
Solution Approach 1:
The base station dynamically adjusts beam directions and transmission power based on real-time detection of User Equipment locations and interference conditions. When concentrated beams might cause interference with other base stations, the system dynamically modifies beam parameters to reduce harmful RF emissions while maintaining adequate SNR for served users.
Solution Approach 2:
The system uses feedback from Angle of Arrival measurements and interference detection to continuously optimize beamforming parameters. By monitoring the RF environment and user positions, the base station adjusts beam directions and power levels to achieve high SNR for served users while minimizing interference to other base stations and users.
3Object-generated harmful factors
If beamforming with multiple antennas is implemented to reduce interference, then radio frequency interference is reduced, but device complexity increases
Solution Approach 1:
The base station is divided into multiple independent antenna elements, each capable of independent signal processing. This segmentation allows the system to implement beamforming by independently controlling each antenna element's phase and amplitude, reducing interference through spatial filtering while managing complexity through modular architecture.
Solution Approach 2:
The base station uses its own received signals from User Equipment to automatically determine Angle of Arrival and calculate appropriate beamforming weights. The system self-configures its beam patterns based on detected user positions, eliminating the need for complex external configuration and reducing operational complexity while maintaining interference reduction capabilities.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach enhances data bandwidth, reduces operating costs by minimizing interference and the need for radio planning, and lowers power consumption while ensuring regulatory safety and compatibility with other networks.
Implementation Method 1
Angle of Arrival estimated as a function of separately demodulated and jointly decoded User Equipment transmitter signals received by at least two spatially separated base station antennas
Implementation Method 2
transmitting an independent data stream from a beamforming base station to a User Equipment receiver in a beam directed based on the User Equipment transmitter signal Angle of Arrival
Data Source
AI summary
Apparatus and associated methods relate to transmitting an independent data stream from a beamforming base station to a User Equipment receiver in a beam directed based on the User Equipment transmitter signal Angle of Arrival estimated as a function of separately demodulated and jointly decoded User Equipment transmitter signals received by at least two spatially separated base station antennas, and scheduling transmission to and from the User Equipment as a function of the Angle of Arrival. In an illustrative example, the beamforming base station may be an LTE base station. The User Equipment may be, for example, a user's smartphone accessing the Internet. The independent data stream may be transmitted to the smartphone in a beam directed to the location of the smartphone. Various examples may advantageously provide higher bandwidth, for example a concentrated beam directed to User Equipment may provide an independent data stream with the full radio bandwidth.