Beamforming Network Access Method for Cell Edge Coverage
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Solution Overview
Problem
High-frequency wireless communications systems have limited coverage due to weak signal penetration and diffraction, leading to inferior signal quality and high access failure rates for cell edge terminal devices.
Innovation Solution
Implementing a network access method that uses beamforming to determine and send access response messages based on received preamble sequences, thereby reducing channel interference and enlarging the cell coverage area, improving the terminal device's access success rate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a high frequency band is used for wireless communication, then bandwidth and data transmission speed are improved, but coverage area and signal penetration capability deteriorate
Solution Approach 1:
The patent segments the coverage area into multiple directional beams using beamforming technology. Instead of attempting to cover the entire area uniformly with a single high-frequency signal, the system divides the coverage into multiple directional segments, each optimized for specific spatial regions. This allows high-frequency signals to maintain their speed advantage while extending effective coverage through multiple targeted beams.
Solution Approach 2:
The patent transitions from omnidirectional or broad coverage in two dimensions to three-dimensional spatial coverage by implementing beamforming across multiple dimensions. The system uses antenna arrays to create beams that can be steered and shaped in multiple spatial dimensions, effectively expanding coverage area while maintaining high-frequency signal integrity and transmission speed.
2Area of stationary object
If beamforming is used to enlarge coverage area, then coverage area is improved, but access failure rate for cell edge terminal devices remains high due to inferior signal quality
Solution Approach 1:
The patent implements preliminary beam training and channel estimation before actual data transmission. The system performs beam sweeping and channel quality assessment in advance to identify optimal beams for cell edge terminal devices. This preliminary action allows the system to pre-compensate for signal quality issues and select the best beams for reliable access, thereby improving access success rate while maintaining enlarged coverage area.
Solution Approach 2:
The patent incorporates feedback mechanisms where terminal devices report channel quality indicators and beam measurement results back to the access device. Based on this feedback, the system dynamically adjusts beamforming parameters, power allocation, and resource assignment for cell edge devices. This closed-loop feedback enables continuous optimization of signal quality and access reliability across the enlarged coverage area.
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
The method enhances the terminal device's access success rate by reducing channel interference and enlarging the cell coverage area, particularly for cell edge devices with inferior signal quality.
Implementation Method 1
The second access device sends the access response message to the terminal device by using the transmit beam. The second access device sends the access response message to the terminal device through beamforming in a process in which the terminal device accesses a network, so that channel interference can be reduced and a cell coverage area can be enlarged.
Implementation Method 2
The second access device receives the preamble sequence through beamforming, so that a coverage area of the second access device is enlarged and a probability that the preamble sequence is received improved.
Data Source
AI summary
Embodiments provide a network access method and a device. In accordance with the method, a preamble sequence may be received by a second network device from a terminal device on a time-frequency resource occupied by the preamble sequence. A transmit beam may be determined for sending an access response message to the terminal device. The access response message can be sent to the terminal device using the transmit beam. The second access device can send the access response message to the terminal device through beamforming, so that a coverage area of the second access device can be enlarged, directivity of data sent to the terminal device can be improved, and a probability that the terminal device receives the access response message is improved. Therefore, a rate that the terminal device succeeds in accessing the second access device is improved.