Dynamic Antenna Pattern Switching for Wireless Frame Transmission
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Solution Overview
Problem
Wireless digital networks face interference issues in dense RF environments due to devices operating on the same or adjacent channels, leading to reduced communication reliability and range, as existing IEEE802.11 protocols lack intelligence to differentiate between interference and communication ranges.
Innovation Solution
Implementing an electronically steerable antenna system that switches between omnidirectional and sectorized radiation patterns during data frame transmission, allowing for a wider initial broadcast to clear nearby devices and then shifting to a narrower pattern for targeted data transmission, thereby increasing the delivery of RF energy to the intended receiver.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If carrier sense and collision avoidance is implemented, then interference between devices is reduced, but transmission reliability deteriorates in RF-dense environments
Solution Approach 1:
The patent implements dynamic antenna pattern switching during frame transmission. The system transitions from omnidirectional patterns for frame initiation to directional patterns for data transmission, adapting the radiation characteristics in real-time based on transmission phase to maintain reliability in dense RF environments
Solution Approach 2:
The patent segments the wireless frame transmission into distinct phases with different antenna patterns. The frame initiation portion uses omnidirectional transmission while the data portion uses directional transmission, allowing different parts of the same transmission to use optimized patterns for their specific function
2Area of stationary object
If omnidirectional antenna pattern is used, then coverage area is maximized, but RF energy delivery to specific receiver deteriorates
Solution Approach 1:
The system dynamically switches antenna patterns based on transmission phase: omnidirectional for frame initiation to maximize coverage and directional for data transmission to concentrate RF energy on the specific receiver, thus resolving the contradiction between coverage area and energy delivery efficiency
Solution Approach 2:
The patent applies different antenna patterns to different portions of the frame transmission. The frame initiation uses omnidirectional quality for broad coverage while the data portion uses directional quality for focused energy delivery, optimizing each phase for its specific requirement
3Reliability
If directional antenna pattern is used, then RF energy delivery is optimized, but coverage area deteriorates
Solution Approach 1:
The system uses directional antenna patterns only during the data transmission phase when focused energy delivery is critical, while using omnidirectional patterns during frame initiation when broad coverage is needed, thus optimizing RF energy delivery without permanently sacrificing coverage area
4Adaptability or versatility
If frame initiation uses omnidirectional pattern, then device discovery is improved, but interference to other devices increases
Solution Approach 1:
The system uses omnidirectional patterns only briefly during frame initiation for device discovery, then switches to directional patterns for data transmission, thus achieving device discovery capability while minimizing the duration and impact of potential interference to other devices
Solution Approach 2:
The patent implements periodic switching between omnidirectional and directional patterns synchronized with frame transmission phases, using omnidirectional only during the brief frame initiation period and directional during the extended data transmission period, reducing overall interference exposure
Data Source
AI summary
Multi-pattern transmission of frames. The method of operations comprises transmitting a first portion of a frame using a first radiation pattern. The frame comprises one or more preambles and a single data portion associated with the one or more preambles. Thereafter, an operation is conducted to switch the radiation pattern from the first radiation pattern, used to produce the first portion of the frame, to a second radiation pattern. A second portion of the same frame is produced using the second radiation pattern.