Multi-generation PPDU Preamble Segmentation for WLAN Bandwidth
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Solution Overview
Problem
Existing wireless local area network (WLAN) technologies face challenges in efficiently supporting multiple generations of wireless communication specifications within a single transmission, leading to limitations in bandwidth and compatibility across different devices.
Innovation Solution
The implementation of a multi-generation physical layer protocol data unit (PPDU) that concurrently includes generation-specific preambles for different generations of the IEEE 802.11 standard in separate subchannels, allowing for modifications such as phase rotations and preamble orthogonality to enhance transmission efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a single generation of wireless communication specification is used, then device compatibility is maintained, but bandwidth and communication efficiency are limited
Solution Approach 1:
The patent segments the wireless channel into multiple subchannels, with each subchannel carrying a preamble formatted according to a specific generation of the wireless communication specification. This allows different generations to coexist in the same transmission without interfering with each other, thereby increasing overall bandwidth while maintaining compatibility with multiple device types.
Solution Approach 2:
The multi-generation PPDU structure enables a single transmission to serve multiple functions by simultaneously supporting multiple generations of wireless communication specifications. Each subchannel can be decoded by devices of the corresponding generation, making the transmission universally compatible across different device generations while maximizing bandwidth utilization.
2Adaptability or versatility
If multiple generation-specific preambles are included in the same transmission, then compatibility with different devices is improved, but transmission complexity increases
Solution Approach 1:
By dividing the transmission into separate subchannels, each carrying a preamble for a specific generation, the complexity of handling multiple generations is distributed across independent segments. This segmentation allows receivers to selectively process only the subchannels relevant to their generation, reducing the processing burden on individual devices while maintaining overall system compatibility.
3Productivity
If preambles are modified to account for aggregate bandwidth, then transmission efficiency is enhanced, but processing requirements increase
Solution Approach 1:
The patent applies local quality by modifying preambles based on the aggregate bandwidth of the multi-generation PPDU while maintaining generation-specific formatting in each subchannel. This allows optimization of transmission efficiency at the system level without requiring complete redesign of individual generation preambles, thus balancing processing requirements with performance gains.
Data Source
AI summary
This disclosure provides methods, devices and systems for wireless communication, and particularly, for generating or receiving a multi-generation physical layer protocol data unit (PPDU). The multi-generation PPDU may concurrently include a first generation-specific preamble based on a first generation of a wireless communication specification (such as that defined by the Institute of Electrical and Electronics Engineers (IEEE) 802.11 family of standards) and a second generation-specific preamble based on a second generation of the wireless communication specification in a same transmission. The generation-specific preambles may be generated based on bandwidth portions of a wireless channel that each generation-specific preamble will occupy in the multi-generation PPDU. One or more of the generation-specific preambles may be modified based on an aggregate bandwidth of the multi-generation PPDU. This disclosure includes several options for modifying one or more generation-specific preambles or data fields to accommodate their use in a multi-generation PPDU.