Null Data Packet Preamble Design for Wideband Subchannel Puncturing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Certain wireless communication standards and protocols do not support preamble puncturing in wide bandwidths, limiting performance in dense deployments of wireless communication devices.
Innovation Solution
Implementing a novel preamble design that allows for preamble puncturing in 20 MHz, 160 MHz, and 80+80 MHz bandwidths, enabling improved channel estimation and downlink multiple-user multiple-input-multiple-output (MU-MIMO) operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If preamble puncturing is implemented in wide bandwidths, then spatial reuse and channel estimation performance are improved, but compatibility with existing wireless communication standards is reduced
Solution Approach 1:
The wide bandwidth channel is segmented into multiple 20 MHz sub-channels, allowing selective puncturing of specific sub-channels while maintaining transmission on others. This segmentation enables partial compatibility where punctured sub-channels can be ignored by legacy devices while non-punctured sub-channels maintain standard compliance.
Solution Approach 2:
Different quality characteristics are applied to different sub-channels within the same transmission. Some sub-channels are punctured (nullified) while others carry full signaling information, allowing local optimization for spatial reuse in specific frequency regions without compromising overall standard compatibility.
2Productivity
If preamble puncturing is implemented in 160 MHz and 80+80 MHz bandwidths, then downlink MU-MIMO performance is improved, but device complexity increases
Solution Approach 1:
The 160 MHz and 80+80 MHz bandwidths are divided into multiple 20 MHz sub-channels, allowing independent puncturing decisions for each sub-channel. This reduces the complexity of managing wide bandwidths as a single unit and enables selective activation of sub-channels based on device capabilities and channel conditions.
Solution Approach 2:
Instead of requiring full preamble transmission across all sub-channels, the system applies partial action by puncturing only the necessary sub-channels while maintaining transmission on others, reducing overall processing complexity while preserving essential MU-MIMO functionality.
Data Source
AI summary
A wireless communication device (alternatively, device, WDEV, etc.) includes at least one processing circuitry configured to support communications with other WDEV(s) and to generate and process signals for such communications. In one example, the circuitry is configured to generate a null data packet (NDP), transmit at least a portion of the NDP to another wireless communication device via fewer than all of a plurality of sub-channels of a communication channel, and receive feedback from the another wireless communication device that is based on the another wireless communication processing the at least the portion of the NDP that is received via the fewer than all of the plurality of sub-channels of the communication channel. In one example, the generated NDP includes at least one signal field (SIG) field therein that includes information to specify a preamble puncturing option or the information is transmitted in a previous packet.