Wideband PPDU Transmission via Stream and Segment Parsing
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Solution Overview
Problem
Current WLAN systems face limitations in achieving significant performance improvements for users, particularly in supporting high-capacity, high-rate services with simultaneous access from multiple devices in densely deployed access points, due to the lack of a specified method for wideband Physical layer Protocol Data Unit (PPDU) transmission in High Efficiency WLAN (HEW) standards.
Innovation Solution
The method involves performing stream parsing of data bit streams to output blocks, determining segment parsing based on predetermined conditions to output frequency subblocks, and performing constellation mapping or Space-Time Block Coding (STBC) decoding for wideband PPDU transmission in HEW systems, utilizing a baseband processor, RF transceiver, and memory in transmitting and receiving apparatuses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional WLAN transmission methods are used, then existing standards are maintained, but wideband PPDU transmission capability is not achieved
Solution Approach 1:
The patent divides the data bit stream into multiple blocks through stream parsing, and further divides blocks into frequency subblocks through segment parsing when predetermined conditions are met. This segmentation enables wideband PPDU transmission by processing data in manageable units across multiple frequency subblocks, resolving the contradiction between achieving wideband capability and managing process complexity.
Solution Approach 2:
The patent dynamically determines whether to perform segment parsing based on predetermined conditions such as bandwidth requirements and data characteristics. The parsing depth and frequency subblock generation are adjusted dynamically rather than using a fixed approach, enabling adaptability for wideband transmission while optimizing processing complexity based on actual transmission needs.
2Productivity
If stream parsing and segment parsing are performed, then wideband transmission is enabled, but processing complexity increases
Solution Approach 1:
The baseband processor performs stream parsing to divide data bit streams into blocks, and conditionally performs segment parsing to divide blocks into frequency subblocks. This segmentation enables parallel processing across multiple frequency subblocks, increasing overall data transmission rate while distributing processing complexity across modular processing stages rather than concentrating it in a single complex stage.
Solution Approach 2:
The patent applies segment parsing only when predetermined conditions are met, rather than always performing full segmentation. This partial action approach enables wideband transmission capability when needed while avoiding unnecessary processing complexity for simpler transmission scenarios, thus improving productivity without always incurring maximum processing complexity.
Data Source
AI summary
Methods and apparatus for a wideband Physical layer Protocol Data Unit (PPDU) transmission in a High Efficiency WLAN (HEW) include a method for transmitting a Physical layer Protocol Data Unit (PPDU) in a wireless local area network. The method may further include performing a stream parsing of data bit streams to output blocks, determining whether to perform a segment parsing of the blocks based on a predetermined condition to output frequency subblocks, performing a constellation mapping of the blocks or the frequency subblocks, and transmitting the PPDU.