Coordinated Multipoint Antenna Node Switching for Coverage Gaps
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Solution Overview
Problem
Conventional wireless communications networks face challenges in maintaining reliable data connections, especially at cell edges and in urban settings with physical obstacles, where signal strength degrades, leading to coverage holes and connectivity issues.
Innovation Solution
A coordinated multipoint transmission/reception network is implemented, where each cell includes multiple antenna nodes connected via optical fiber to a common baseband processing unit, allowing user devices to switch between antenna nodes based on signal strength measurements to ensure optimal connectivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If antennas are placed at a centralized location within each cell, then the base station structure is simplified and easy to implement, but the coverage performance degrades at cell edges and in obstructed areas
Solution Approach 1:
The patent segments the centralized antenna system into multiple distributed antenna nodes deployed throughout the cell area. Each antenna node is connected to the baseband processing unit via optical fiber, creating a distributed antenna system that maintains simplified base station architecture while improving coverage reliability at cell edges and in obstructed areas.
2Device complexity
If a single antenna node serves a user device, then the system complexity is reduced, but the connectivity reliability degrades when the user moves to areas with poor signal from the serving antenna
Solution Approach 1:
The patent merges multiple antenna nodes into a coordinated multipoint system where multiple antenna nodes can simultaneously serve a single user device. The baseband processing unit coordinates transmissions from multiple antenna nodes, combining their signals to provide improved connectivity reliability while the user moves through the cell, without excessively increasing system complexity.
3Reliability
If multiple antenna nodes are deployed throughout the cell, then the coverage reliability is improved, but the network complexity and infrastructure requirements increase
Solution Approach 1:
The patent introduces an optical fiber network as an intermediary to connect multiple distributed antenna nodes to the baseband processing unit. This intermediary infrastructure enables reliable coverage through multiple distributed nodes while managing network complexity by providing a standardized, high-bandwidth connection method between antenna nodes and the central processing unit.
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 solution enhances wireless connectivity by dynamically switching between antenna nodes to maintain strong signal strength, reducing coverage holes and improving network performance even in challenging environments.
Implementation Method 1
Each antenna node may include at least two antennas and associated radio-frequency front-end circuitry. The antenna nodes may be distributed at various geographical locations within the cell... connected via optical fiber to a common baseband processing unit
Data Source
AI summary
A coordinated multipoint (CoMP) transmission radio network is provided. Each cell in the CoMP network may include antenna nodes distributed at different geographical locations and coupled to a common baseband processing unit. When operating a user device in the CoMP network, the device may register with a neighboring baseband unit and may be served using at least one antenna node. The device may receive reference signals from different antenna nodes in its vicinity, compute receive signal strength levels, and report the measurements to the corresponding baseband unit. The baseband unit may then switch appropriate antennas in/out of use based on the measured results. If desired, the device may be served using more than one antenna node that may or may not be part of the same cell.