Enhanced PHY Header Structure for Millimeter-Wave Multi-User MIMO
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Solution Overview
Problem
Current wireless communication systems, particularly in the millimeter-wave band, face limitations in supporting multi-user MIMO transmissions and channel bonding due to inadequate header configurations, which restrict data rates and capabilities in systems like IEEE 802.11ad.
Innovation Solution
The implementation of enhanced Physical Layer (PHY) headers that include additional signaling fields and non-legacy headers to support multi-user MIMO operations and channel bonding, allowing for simultaneous data transmission to multiple stations and increased channel bandwidth utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a single channel bandwidth is used for all transmissions, then device compatibility and simplicity are maintained, but data rates and communication capacity are limited
Solution Approach 1:
The patent segments the channel bandwidth into multiple sub-channels that can be independently configured and transmitted. Instead of using a single channel for all transmissions, the system divides the available bandwidth into multiple smaller channels that can be combined through channel bonding to achieve higher data rates while maintaining compatibility with single-channel devices.
Solution Approach 2:
The patent introduces a new dimension to channel configuration by implementing channel bonding across multiple frequency channels. This allows the system to expand beyond the single-channel constraint by utilizing multiple channels simultaneously, effectively adding a frequency diversity dimension to the communication system.
2Adaptability or versatility
If a legacy PHY header format is used, then compatibility with existing standards is maintained, but support for multi-user MIMO and channel bonding is inadequate
Solution Approach 1:
The patent implements a nested header structure where a legacy PHY header is embedded within an extended PHY header format. The legacy header fields are preserved for compatibility, while additional fields are nested within the extended structure to provide multi-user MIMO and channel bonding capabilities. This allows receiving devices to process only the necessary portion of the header based on their capabilities.
Solution Approach 2:
The PHY header is segmented into multiple functional sections: legacy fields for backward compatibility, new fields for multi-user MIMO indication, and additional fields for channel bonding configuration. This segmentation allows different device types to selectively process relevant header portions while maintaining overall system compatibility.
3Productivity
If a STA transmits frames to a single STA at a time, then system simplicity is maintained, but communication efficiency and throughput are reduced
Solution Approach 1:
The patent implements a universal PHY header structure that can accommodate both single-user and multi-user transmission modes. The same header format is used regardless of the number of intended recipients, with specific fields indicating the transmission type. This allows the system to maintain simplicity for single-user cases while enabling multi-user MIMO capabilities when needed, without requiring separate protocol paths.
Data Source
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AI summary
Some demonstrative embodiments include apparatuses, devices, systems and methods of communicating a wireless communication frame. For example, a wireless station may generate a frame including a header portion, the header portion including a legacy header, followed by a first non-legacy header, the header portion including a first indication to indicate whether or not the header portion is to include a second non-legacy header following the first non-legacy header, the header portion including a second indication to indicate whether or not channel bonding is to be used; and process transmission of the frame to at least one second wireless station over a directional wireless communication band.