Central Processing Node Wireless Access Interference Coordination
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Solution Overview
Problem
Conventional macro cellular systems face limitations in service capacity, especially at cell edges and in high-density areas, due to significant interference between nearby wireless access nodes in micro cells with small radii, which existing solutions like interference randomization and multi-user MIMO fail to effectively address.
Innovation Solution
A method involving a central processing node that sends and receives pilot signal strength or channel characteristics to allocate appropriate wireless access nodes and modulation schemes for user terminals, reducing interference by dynamically selecting optimal paths and beamforming schemes based on signal-to-interference-plus-noise ratios.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the cell radius is reduced to increase service capacity in hot areas, then system capacity and bandwidth are improved, but interference between neighboring wireless access nodes increases significantly
Solution Approach 1:
The patent changes the parameter of cell radius from conventional large radius to small micro cell radius (50-100 meters), which increases system capacity and bandwidth but simultaneously causes severe interference between neighboring access nodes. This parameter change is the core technical contradiction that the patent aims to resolve through dynamic resource allocation and interference coordination mechanisms.
2Productivity
If multiple user terminals share the same channel resources to improve resource utilization, then system efficiency is improved, but interference between different user terminals increases
Solution Approach 1:
The patent implements dynamic resource allocation where the base station dynamically assigns different time-frequency resources to multiple user terminals based on real-time channel conditions, signal quality, and interference levels. This dynamic approach allows multiple users to share channel resources efficiently while minimizing mutual interference through adaptive resource partitioning.
3Object-affected harmful factors
If conventional interference solutions like interference randomization and multi-user MIMO are applied in micro cells with small radius, then some interference mitigation is achieved, but the solutions are not effective enough for grid wireless access systems with closely spaced nodes
Solution Approach 1:
The patent introduces a central controller as an intermediary that coordinates resource allocation and interference management across multiple access nodes in the grid system. This central controller collects channel state information from all nodes and users, performs global optimization, and distributes resource allocation decisions, enabling more effective interference mitigation than distributed conventional methods.
Data Source
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AI summary
Embodiments of the present invention disclose a wireless access method, device, and system. The method includes: sending pilot signal strength or channel characteristics to a central processing node, where the pilot signal strength or channel characteristics are fed back by a user terminal within the coverage area of a wireless access node and are between the wireless access node and the corresponding user terminal; receiving access indication information of the user terminal, which is fed back by the central processing node and is determined according to the pilot signal strength or channel characteristics, where the access indication information of the user terminal includes an identifier of the wireless access node connected with the user terminal and a corresponding coding and modulation scheme; and sending the identifier of the wireless access node connected with the user terminal and the corresponding coding and modulation scheme to the corresponding user terminal. With the present invention, appropriate wireless access nodes and modulation and coding schemes are allocated to different user terminals according to the pilot signal strength or channel characteristics, which may reduce the interference between neighboring wireless access nodes or neighboring user terminals.