Multi-Channel Beacon Transmission for 60 GHz Beam Squinting
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Solution Overview
Problem
Current wireless communication networks face limitations in transmitting beacon frames effectively due to beam squinting, which reduces the effective bandwidth and accuracy of directional transmission, especially in wideband channels like the 60 GHz unlicensed band.
Innovation Solution
The method involves transmitting beacon frames over multiple channels with different carrier frequencies, including a primary channel and secondary channels, to reduce beam squinting and enhance reliability and versatility, allowing both conventional and evolved STAs to communicate while enabling beamforming operations on preferred channels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If beacon frames are transmitted over a single channel, then device complexity is reduced, but beam squinting effects increase and transmission reliability decreases
Solution Approach 1:
The patent segments the beacon transmission by dividing it across multiple channels (primary and secondary channels) within a beacon transmission interval. Different beacon frames are transmitted on different channels, which allows the system to mitigate beam squinting effects by distributing transmission across frequency diverse paths, thereby improving reliability without requiring a complete system redesign
Solution Approach 2:
The patent changes the frequency parameter by transmitting beacon frames on multiple channels with different carrier frequencies. This parameter change enables the system to overcome beam squinting effects that occur at single frequencies, as the directional transmission characteristics vary across different frequency channels, improving overall transmission reliability
2Reliability
If beacon frames are transmitted over multiple channels, then transmission reliability improves, but device complexity increases
Solution Approach 1:
The patent implements multi-functionality by designing the access point to perform both single-channel and multi-channel beacon transmissions within the same beacon transmission interval. The system can adaptively select whether to use one channel or multiple channels based on network conditions, making the system universally applicable to different scenarios without requiring separate hardware configurations
Solution Approach 2:
The patent introduces dynamics by allowing the access point to flexibly switch between transmitting on a single channel or multiple channels within each beacon transmission interval. This dynamic adaptation enables the system to optimize for reliability when needed while reducing complexity when conditions permit, resolving the contradiction between reliability improvement and complexity increase
3Measurement precision
If conventional beacon transmission is used, then compatibility with existing systems is maintained, but beamforming accuracy decreases in wideband channels
Solution Approach 1:
The patent adds another dimension to beacon transmission by introducing multiple frequency channels. Instead of relying solely on spatial dimension for beamforming, the system utilizes the frequency dimension to improve beamforming accuracy. This dimensional expansion allows the system to achieve better directional transmission precision in wideband channels while maintaining compatibility with conventional single-channel systems through adaptive selection
4Reliability
If multiple channels are used for beacon transmission, then beam squinting effects are minimized, but the number of required transmission resources increases
Solution Approach 1:
The patent merges multiple beacon transmissions into a unified beacon transmission interval. By combining the transmission of multiple beacon frames across different channels within a single organized interval, the system efficiently utilizes available resources and avoids the need for separate resource allocations for each channel, thereby minimizing the total transmission resources required while still reducing beam squinting effects
Data Source
AI summary
A method includes transmitting with a selected antenna of an access point, one or more first beacon frames over a primary channel within a beacon transmission interval, and transmitting with the selected antenna of the access point, one or more second beacon frames over a secondary channel within the beacon transmission interval.