Wi-Fi Long Range Packet Decoding via Hybrid Preamble Structure
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Solution Overview
Problem
Legacy Wi-Fi systems are unable to identify and decode long range Wi-Fi packets due to differences in packet formats, leading to hardware independence and increased costs in wireless communication systems, causing inconvenience to users.
Innovation Solution
A data unit processing method and communication system that configures a data unit with a specific format preamble and a symbol part following a Wi-Fi long range packet format, allowing the preamble to be decoded according to a first communication standard and the symbol to be processed in either Wi-Fi legacy or long range mode, depending on identifying information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If legacy Wi-Fi system uses independent hardware for legacy mode, then it can maintain compatibility with legacy packets, but it cannot decode long range packets and increases system cost
Solution Approach 1:
The patent implements a universal data unit structure that can be decoded by both legacy and long range Wi-Fi systems. The data unit includes a preamble that can be processed by legacy systems and a payload that can be interpreted by both modes, allowing a single hardware system to handle both legacy and long range packets without requiring separate independent hardware for each mode.
Solution Approach 2:
The data unit is segmented into distinct components: a preamble portion that follows legacy format for compatibility, and a payload portion that follows long range format. This segmentation allows legacy systems to process the preamble while long range systems can access the full data unit, resolving the hardware independence issue by dividing functionality across packet sections rather than requiring separate hardware systems.
2Reliability
If long range Wi-Fi system uses different packet format, then it achieves better sensitivity and longer transmission distance, but legacy Wi-Fi system cannot identify or decode these packets
Solution Approach 1:
The packet format applies different quality characteristics to different sections: the preamble uses legacy-compatible formatting with standard detection sequences that legacy systems can identify, while the payload uses long range optimized formatting with enhanced modulation and coding schemes. This local differentiation allows each section to optimize for its specific function while maintaining overall compatibility.
Solution Approach 2:
The preamble acts as an intermediary between legacy and long range systems. It contains identification sequences and formatting that legacy systems can recognize and process, serving as a bridge that allows legacy hardware to at least detect and partially process long range packets, while the full long range capability is accessed by dedicated long range receivers.
3Reliability
If separate hardware is used for legacy and long range modes, then each mode can be optimized independently, but system cost increases and user convenience decreases
Solution Approach 1:
The patent designs a universal data unit structure that can be transmitted and received by both legacy and long range systems using the same hardware infrastructure. The data unit format includes compatibility layers that allow single hardware systems to operate in both modes, eliminating the need for separate independent hardware for each mode and thereby reducing system cost while maintaining mode-specific optimization through software or protocol handling.
Data Source
AI summary
A data unit processing method performed by a first communication device, comprising: configuring a data unit by the first communication device, the data unit comprising: a specific format preamble following a first packet format; and a symbol part, comprising at least one symbol and following a Wi-Fi long range packet format. The specific format preamble can be decoded according to a first communication standard and the symbol can be decoded according to a Wi-Fi long range mode. The symbol part can be identified according to the specific format preamble. A method can decode the above-mentioned data unit and a communication device can perform the methods are also disclosed.