Antenna Training Path Switching for Wireless Link Recovery
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Solution Overview
Problem
Millimeter-wave WPANs are less robust due to oxygen absorption and high attenuation through obstructions, and directional antennas make links sensitive to mobility, requiring a mechanism for fast recovery with minimal service disruption.
Innovation Solution
A method for periodically monitoring and switching between primary and secondary communication paths using antenna training and path quality assessment, with or without PNC intervention, to maintain communication link integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If directional antennas are used to increase communication range, then communication range is improved, but link stability deteriorates due to sensitivity to mobility and orientation changes
Solution Approach 1:
The system performs preliminary actions by maintaining a pre-established secondary communication path alongside the primary directional path. When the primary link becomes unstable due to mobility or orientation changes, the secondary path is already prepared and can be activated immediately, avoiding service disruption while maintaining the benefits of directional antennas for extended range.
Solution Approach 2:
The system dynamically changes operational parameters by switching between primary and secondary communication paths based on link quality metrics. When the directional primary link deteriorates, the system transitions to an alternative path with different spatial characteristics, effectively adapting to mobility-induced parameter changes while maintaining communication reliability.
2Productivity
If millimeter-wave frequencies are used to achieve very high data rates, then data rate is improved, but robustness deteriorates due to oxygen absorption and high attenuation through obstructions
Solution Approach 1:
The system introduces a secondary communication path as an intermediary alternative when the primary millimeter-wave path becomes unreliable. This intermediary path provides a backup communication channel that can be activated when attenuation or absorption degrades the primary link, maintaining data transmission reliability while preserving the high data rate capability of the mmWave primary path when conditions are favorable.
3Device complexity
If a single primary communication path is used to simplify the system, then device complexity is reduced, but reliability deteriorates when the path is disrupted by mobility or obstructions
Solution Approach 1:
The system performs preliminary setup of a secondary communication path during the initial connection phase. This preliminary action ensures that when the primary path is disrupted, a backup path is already prepared and can be activated immediately, improving reliability without requiring complex real-time path discovery mechanisms.
Solution Approach 2:
The communication system is segmented into a primary path for normal operation and a secondary path for backup. This segmentation allows the system to maintain simplicity during normal operation while having a pre-prepared alternative for when the primary path fails, balancing complexity and reliability by dividing the communication functionality into distinct operational modes.
Data Source
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AI summary
A wireless communication device and a method of operating an antenna training process to discover first and second communication paths between at least two stations, to rank according to a quality criterion transmitting and receiving modes of an antenna, to report best transmitting mode and best receiving mode for transmitting and receiving signals over said first and second communication paths and to establish a communication link on a selected communication path based on the quality of the transmitting mode and said receiving mode.