Wireless Control Apparatus Beamforming Frequency Adaptation
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Solution Overview
Problem
In high-speed terminal movement scenarios, conventional terminal position detection methods increase the transmission frequency of terminal search beams, leading to decreased throughput for the entire service area.
Innovation Solution
A wireless control apparatus that estimates the arrival direction of wireless signals and controls beamforming to reduce the frequency of terminal search beams in spots with no active terminals, thereby increasing the frequency of communication beams in other spots within the service area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the transmission frequency of terminal search beams is increased to detect terminal position frequently, then the position detection accuracy for high-speed terminals is improved, but the cell throughput decreases
Solution Approach 1:
The patent applies local quality by differentiating the beam transmission frequency based on terminal movement state. For high-speed terminals, the terminal search beam transmission frequency is increased to maintain position detection accuracy. For low-speed or stationary terminals, the frequency is maintained at normal levels. This localized adjustment of transmission frequency to specific spatial regions or terminal groups resolves the contradiction by applying high resource consumption only where necessary for position detection, thereby maintaining detection accuracy for moving terminals while preserving overall cell throughput.
2Loss of time
If the transmission frequency of terminal search beams is increased, then the time for position detection is reduced, but the time for data communication decreases
Solution Approach 1:
The patent implements dynamics by making the terminal search beam transmission frequency adjustable based on terminal movement detection. When a terminal is detected to be moving at high speed, the system dynamically increases the transmission frequency of terminal search beams to reduce position detection time and prevent communication failure. When terminals are stationary or moving slowly, the frequency is reduced to maximize data communication time. This dynamic adjustment resolves the contradiction by adapting the detection frequency to actual terminal behavior rather than using a fixed high frequency for all terminals.
3Reliability
If beam irradiation is performed frequently to cover the whole service area, then the position detection capability is improved, but the resource consumption increases
Solution Approach 1:
The patent applies parameter changes by adjusting the transmission frequency parameter of terminal search beams based on terminal movement state. Instead of maintaining a constantly high transmission frequency across the entire service area, the system changes the frequency parameter dynamically - increasing it for terminals detected to be moving at high speed and maintaining or reducing it for other terminals. This parameter adjustment resolves the contradiction by optimizing the balance between position detection capability and resource consumption according to actual terminal behavior patterns.
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 reduces resource consumption of terminal search beams and improves overall cell throughput by distributing resources to communication beams for active spots.
Implementation Method 1
an array antenna having a plurality of arrays, each of which is an aggregate of antenna elements, is used, and the beam irradiation is performed from the plurality of arrays in different directions
Implementation Method 2
there is hybrid beamforming that performs beamforming in which analog beamforming and digital precoding are combined
Data Source
AI summary
A wireless control apparatus controls beamforming performed by a wireless base station apparatus that provides a communication service to a service area which includes a plurality of spots to be irradiated with a beam including a terminal search beam and a communication beam that are not used simultaneously for irradiation, and is irradiated with a plurality of the beams and is not simultaneously covered by the plurality of beams, and the apparatus includes: an arrival direction estimation unit that estimates an arrival direction of a wireless signal transmitted by a terminal communicating with a wireless base station; and a control unit that determines whether there is an active terminal in the spots on the basis of the arrival direction estimated by the arrival direction estimation unit, and, when it is determined that there is no active terminal, controls beamforming performed by the wireless base station apparatus to decrease a frequency of the terminal search beam with which one or more of the spots determined to include no active terminal is irradiated and increases a frequency of a communication beam with which another of the spots in the service area is irradiated.