Mixed-Format PPDU Structure for Backward-Compatible WiGig
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Solution Overview
Problem
Current WiGig technology at 60-GHz millimeter wave band struggles to match the high data transmission rates of recent wired digital interfaces like USB 3.5 and HDMI 1.3, while maintaining compatibility with the IEEE 802.11 WLAN standard.
Innovation Solution
The implementation of a wireless communication device that generates and transmits a physical layer protocol data unit (PPDU) with a legacy preamble, header, non-legacy header, and identification information, supporting variable bandwidth and backward compatibility through a mixed format PPDU, which includes a non-legacy header and data field, enabling increased data transmission rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If WiGig technology uses the IEEE 802.11ad standard format, then backward compatibility with the IEEE 802.11 WLAN standard is maintained, but the data transmission rate cannot reach several tens of Gbps comparable to USB 3.5 or HDMI 1.3
Solution Approach 1:
The PPDU structure is segmented into distinct portions: a legacy preamble and header section for compatibility, and a non-legacy header section for enhanced functionality. This segmentation allows legacy devices to process the initial portion while newer devices can utilize the complete structure for higher data rates.
Solution Approach 2:
The non-legacy header is nested within the PPDU structure alongside the legacy header, creating a layered format where the legacy portion contains basic compatibility information and the nested non-legacy portion contains advanced transmission parameters. This nested structure enables dual-functionality within a single protocol frame.
2Productivity
If WiGig technology increases data transmission rate to match USB 3.5 or HDMI 1.3, then productivity is improved, but compatibility with legacy IEEE 802.11 WLAN devices is lost
Solution Approach 1:
The PPDU structure is designed with multi-functionality to serve both legacy and non-legacy devices. The legacy header portion ensures universal compatibility with existing IEEE 802.11 devices, while the non-legacy header enables enhanced data transmission rates for modern devices, making the same protocol universal across different generation devices.
Solution Approach 2:
Different portions of the PPDU structure have different quality characteristics: the legacy header portion maintains standard compliance for broad compatibility, while the non-legacy header portion provides optimized parameters for high-speed transmission. This local differentiation of quality allows the system to meet diverse requirements within a single transmission.
3Productivity
If a mixed format PPDU with non-legacy header is introduced, then data transmission rate can be increased, but device complexity increases due to dual header structure
Solution Approach 1:
The system dynamically adapts to different device types by including appropriate header information in the PPDU. Devices can selectively process only the header portions relevant to their capability level, making the effective processing complexity dynamic rather than static. Legacy devices ignore the non-legacy portion while newer devices utilize it for optimized transmission.
Data Source
AI summary
A wireless communication device serving as an NG60 WiGig device includes a PPDU generator that generates an MF control PHY PPDU (physical layer protocol data unit) including a legacy preamble, a legacy header, an NG60 header (a non-legacy header), a data field, and identification information indicating that the non-legacy header is included in the PPDU and a transmitter that transmits the generated MF control PHY PPDU.