Aggregate PPDU Format for MIMO WiGig and Legacy Compatibility
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Solution Overview
Problem
Existing WiGig technologies face challenges in maximizing transmission efficiency while maintaining backward compatibility with legacy devices and supporting MIMO transmission with variable bandwidth.
Innovation Solution
The solution involves defining a transmission format and method for aggregate MF PPDUs that include a legacy STF, CEF, and header, along with an NG60 header, STF, and CEFs, allowing for MIMO spatial multiplexing and variable bandwidth, while ensuring legacy devices can decode the legacy header correctly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If aggregate MF PPDU format is defined to support MIMO transmission with variable bandwidth, then transmission efficiency and data throughput are improved, but device complexity and implementation difficulty increase
Solution Approach 1:
The aggregate MF PPDU is segmented into multiple individual MF PPDUs, each with its own header and data portion. This segmentation allows each component to be independently processed and transmitted, simplifying the overall transmission mechanism while enabling efficient aggregate transmission through concatenation of multiple units without inter-frame spacing.
Solution Approach 2:
The defined aggregate MF PPDU format serves multiple functions simultaneously: it supports MIMO spatial multiplexing transmission, accommodates variable bandwidth configurations, maintains backward compatibility with legacy WiGig devices through proper header structure, and enables efficient aggregate transmission. This multi-functionality resolves the contradiction by making a single format capable of handling diverse transmission requirements.
2Productivity
If aggregate MF PPDU format is defined to support MIMO transmission with variable bandwidth, then data throughput is improved, but format definition complexity increases
Solution Approach 1:
The aggregate MF PPDU format incorporates dynamic parameters that allow variable bandwidth and MIMO configurations. The format can adapt to different transmission conditions by adjusting the number of spatial streams, bandwidth allocation, and aggregation level, enabling high data throughput while maintaining a standardized format definition that handles variability through structured parameter fields.
3Productivity
If new transmission format for aggregate MF PPDU is introduced, then transmission efficiency is maximized, but backward compatibility with legacy devices may be compromised
Solution Approach 1:
The aggregate MF PPDU format uses the legacy header structure as an intermediary layer that legacy devices can recognize and process, while the actual data transmission utilizes the new efficient aggregate format. This intermediary approach allows legacy devices to coexist with new devices without preventing the deployment of high-efficiency transmission formats, as legacy devices simply ignore the aggregate structure and process individual PPDUs as before.
Data Source
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AI summary
A transmission apparatus of the present disclosure includes a transmission signal generator which, in operation, generates a transmission signal having an aggregate Physical layer Protocol Data Unit (aggregate PPDU) that includes a legacy preamble, a legacy header, a non-legacy preamble, a plurality of non-legacy headers and a plurality of data fields; and a transmitter which, in operation, transmits the generated transmission signal, wherein the legacy preamble, the legacy header and the plurality of non-legacy headers are transmitted using a standard bandwidth, while the non-legacy preamble and the plurality of data fields are transmitted using a variable bandwidth that is larger than the standard bandwidth and wherein a plurality of sets of a non-legacy header and a corresponding data field are transmitted sequentially in a time domain.