Movable Patch Antenna Alignment for Cell-Edge FWA Reception
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Solution Overview
Problem
Conventional fixed wireless access (FWA) systems struggle to provide cell center-like performance at the cell edge areas without increasing telecommunications infrastructure costs, leading to poor signal quality and low data rates.
Innovation Solution
The introduction of an antenna device that can be detachably attached to customer premise equipment (CPE) in a Snap-On configuration, featuring passive patch antennas that automatically align in specific three-dimensional positions based on time-of-day instructions, to enhance RF signal receptivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If base station transmit power is increased to improve signal strength for cell edge users, then signal quality is improved, but inter-cell interference increases
Solution Approach 1:
The patent employs multiple antennas with different radiation patterns (omnidirectional and directional) to provide localized signal enhancement. The omnidirectional antenna covers the entire cell edge area while directional antennas focus energy in specific sectors, allowing signal quality improvement without uniformly increasing power across all directions, thus reducing inter-cell interference.
Solution Approach 2:
The base station is segmented into multiple independent antenna elements that can be controlled separately. This allows the system to divide the coverage area into different zones and apply appropriate beamforming and power control strategies to each zone, improving cell edge signal quality while minimizing interference to other cells through spatial separation.
2Productivity
If conventional CPE performance is improved to achieve cell center like performance at cell edge, then data rate is improved, but infrastructure cost increases
Solution Approach 1:
The base station is designed with multi-functional antenna elements that can operate in different modes (omnidirectional transmission, directional beamforming, sector coverage) to serve multiple purposes. This universal design allows the same infrastructure to provide cell center and cell edge optimization without requiring separate dedicated systems, avoiding additional infrastructure costs.
Solution Approach 2:
The system implements self-organizing network (SON) features where the base station automatically adjusts antenna beamforming patterns, power levels, and resource allocation based on real-time channel conditions and user distribution. This self-service capability eliminates the need for manual infrastructure adjustments and reduces operational costs while maintaining high data rates at cell edge locations.
3Reliability
If antenna elements are added to improve signal coverage at cell edge, then signal strength is improved, but device complexity increases
Solution Approach 1:
The antenna system dynamically adjusts beamforming patterns, radiation directions, and power distribution based on real-time channel state information and user equipment locations. This dynamic adaptation allows the system to achieve improved signal strength at cell edge without requiring a static complex antenna structure, as the same antenna elements can be reconfigured electronically to serve different spatial zones.
Solution Approach 2:
The system changes operational parameters such as beamforming weights, antenna tilt angles, and power allocation ratios to optimize signal strength for cell edge users. By adjusting these parameters rather than physically reconfiguring the antenna structure, the system achieves improved coverage while maintaining manageable device complexity through software-controlled parameter optimization.
Data Source
AI summary
Provided is a system that comprises an antenna device that includes a plurality of passive patch antennas on a planar substrate and a movable frame that supports the planar substrate, and a processor that controls a movement of the movable frame to align the plurality of passive patch antennas in a first 3D position coordinate at a first time-of-day such that an RF signal receptivity by one or more passive patch antennas of the plurality of passive patch antennas is increased from a first signal state to a second signal state at a specific location of the antenna device, and updates the movement of the movable frame to align the plurality of passive patch antennas in a second 3D position coordinate at a second time-of-day such that the RF signal receptivity is increased from the second signal state to a third signal state at the specific location.