Aggregate PPDU Channel Allocation for Legacy-Compatible WiGig
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Solution Overview
Problem
Next Generation 60 GHz (NG60) WiGig devices need to support both Legacy Format (LF) and Mixed Format (MF) Physical Layer Convergence Protocol Data Units (PPDUs to maintain compatibility with legacy devices and achieve higher transmission speeds, while existing technologies lack efficient methods for maximizing transmission efficiency.
Innovation Solution
A transmission device and method that generates an aggregate PPDU by adding a guard interval to each PPDU transmitted over multiple channels with varying bandwidths, incorporating legacy and non-legacy headers and data fields, and transmitting them using single carrier or OFDM modulation, with specific configurations to optimize channel utilization and reduce power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If NG60 WiGig devices support both Legacy Format and Mixed Format PPDUs to maintain compatibility with legacy devices, then compatibility is improved, but device complexity increases
Solution Approach 1:
The PPDU structure is segmented into distinct legacy and non-legacy portions. The legacy header contains STF, CEF, and legacy header fields compatible with legacy devices, while the non-legacy header contains additional fields for NG60 functionality. This segmentation allows legacy devices to process only the legacy portion while NG60 devices can utilize both portions, thereby maintaining compatibility without requiring legacy devices to understand complex new formats.
Solution Approach 2:
The transmission device is designed with multi-functionality to support both Legacy Format and Mixed Format PPDUs. The same hardware infrastructure can transmit legacy-compatible signals while also supporting extended non-legacy formats, allowing a single device to serve both legacy and next-generation requirements without requiring separate dedicated systems.
2Speed
If variable channel bandwidth is used to achieve higher transmission speeds, then data transmission speed is improved, but compatibility with legacy devices deteriorates
Solution Approach 1:
Different portions of the transmission are assigned different quality characteristics. The legacy header portion uses standard channel bandwidth and legacy-compatible modulation to ensure compatibility, while the data field portion can utilize variable channel bandwidth and advanced modulation schemes to achieve higher transmission speeds. This local differentiation allows each portion to be optimized for its specific requirement.
Solution Approach 2:
The system dynamically adjusts channel bandwidth allocation based on the transmission content. Legacy header fields are transmitted using fixed standard bandwidth for compatibility, while non-legacy data fields can dynamically utilize expanded bandwidth when available. This dynamic allocation allows the system to adapt bandwidth usage to the specific requirements of different data portions.
3Productivity
If Aggregate-PPDU is used to improve transmission efficiency, then transmission efficiency is improved, but complexity of format configuration increases
Solution Approach 1:
Aggregate-PPDU enables continuous transmission by eliminating inter-frame spacing and preambles between multiple PPDUs. The legacy header of the first PPDU serves as the synchronization point, and subsequent PPDUs are transmitted continuously without interruption. This continuous transmission mode maximizes channel utilization and improves overall transmission efficiency while the standardized aggregation format manages the complexity of coordinating multiple PPDUs.
Data Source
AI summary
In a transmission device, a signal processing circuit generates an aggregate physical layer convergence protocol data unit (A-PPDU) by adding a guard interval to each of a first part of a first physical layer convergence protocol data unit (PPDU) transmitted over each of a first through L′th channel of a predetermined channel bandwidth, where L is an integer of 2 or greater, a second part of the first PPDU transmitted over each of an (L+1)′th through P′th channel, which is a variable channel bandwidth that is N times the predetermined channel bandwidth, where N is an integer of 2 or greater and P is an integer of L+1 or greater, and a second PPDU transmitted over the (L+1)′th through P′th channel. A wireless circuit transmits the A-PPDU.