Phased Antenna Array Beam Control for Reliable Mesh Backhaul
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Solution Overview
Problem
Current wireless mesh networking systems fail to provide adequate protection for point-to-point narrow beam wireless paths, which are directional and sensitive to line-of-sight conditions, and do not ensure high reliability for backhaul data paths carrying control signaling and user data, leading to network performance degradation due to interference and signal inhibitors.
Innovation Solution
The implementation of a radio module with a phased antenna array, RF chains, and a control unit that dynamically controls the activation state of antenna elements to alter polarization and emission patterns, including the use of beam narrowing modules to consolidate signals into narrow beams, ensuring reliable and interference-immune communication links.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If point-to-point narrow beam wireless paths are used for high-speed data transmission, then data transmission speed is improved, but reliability deteriorates due to sensitivity to line-of-sight conditions and environmental obstacles
Solution Approach 1:
The system segments the wireless communication function into multiple independent paths: primary narrow beam paths for high-speed data and secondary protective paths for reliability. When the primary path fails due to line-of-sight blockage, the system switches to alternative paths, thereby maintaining both high speed and reliability.
Solution Approach 2:
The system dynamically changes transmission parameters including beam width, polarization, and frequency based on link conditions. For backhaul links requiring high reliability, the system uses wider beams and diverse polarizations to maintain connectivity despite environmental changes, while accessing high-speed narrow beam paths when conditions permit.
2Device complexity
If the same beam transmission technique is used for both access paths and backhaul paths, then device complexity is reduced, but network performance deteriorates due to interference sensitivity of backhaul paths
Solution Approach 1:
The system applies different transmission qualities and techniques to different parts of the network: backhaul paths use more robust, interference-resistant techniques with wider beams and diversity schemes, while access paths can use simpler, higher-speed narrow beam techniques. This local differentiation optimizes overall network performance without excessive complexity.
Solution Approach 2:
The radio module is designed with multi-functional capability to support both narrow beam high-speed mode and wide beam robust mode, as well as multiple polarizations. This universal design allows the same hardware to adapt to different requirements of access and backhaul paths without requiring separate dedicated equipment.
3Object-affected harmful factors
If narrow beam directional transmission is used to reduce interference, then interference resistance is improved, but adaptability deteriorates when line-of-sight conditions change due to vegetation growth or node loss
Solution Approach 1:
The system dynamically adjusts beam characteristics including width, direction, and polarization based on real-time link conditions. When line-of-sight is blocked by vegetation growth or node loss, the system automatically switches from narrow fixed beams to wider steerable beams, maintaining interference resistance while adapting to changing environmental conditions.
Solution Approach 2:
The system employs continuous feedback mechanisms to monitor link quality, signal strength, and environmental conditions. Based on this feedback, the transmission parameters are automatically adjusted to maintain optimal performance, balancing interference resistance with adaptability to changing line-of-sight conditions.
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 the reliability and performance of wireless mesh networks by maintaining communication integrity even under non-line-of-sight conditions and reducing interference, thereby ensuring stable data transmission and network resilience.
Implementation Method 1
a phased antenna array comprising antenna elements having multiple different polarizations (e.g., a first set of antenna elements having a horizontal polarization and a second set of antenna elements having a vertical polarization)
Implementation Method 2
at least one beam narrowing module. The at least one beam narrowing module may take various forms, including a lens antenna or a parabolic antenna
Implementation Method 3
a control unit that is configured to dynamically control an activation state (e.g., the activation/deactivation) of the RF chains and their corresponding antenna elements in order to alter the polarization and/or emission pattern of the radiated signal
Data Source
AI summary
A radio module for a wireless communication node comprises (i) a phased antenna array comprising a first set of antenna elements having a first polarization and a second set of antenna elements having a second polarization, (ii) a radio frequency (RF) module comprising a plurality of RF chains that are configured to feed the first and second sets of antenna elements in the phased antenna array, and (iii) a control unit that is configured to control an activation state of each antenna element in the phased antenna array. The radio module further comprises at least one beam narrowing module that is configured to (i) receive signals emitted by any active antenna element in the phased antenna array and (ii) consolidate the received signals into a respective narrow beam composite signal.