320 MHz WLAN Puncturing with CCFS Signaling for Resource Use
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Solution Overview
Problem
Current wireless local area network (WLAN) systems face challenges in efficiently utilizing resources for high-throughput communication, particularly in the 320 MHz band, due to limitations in channel center frequency segment (CCFS) information and puncturing patterns.
Innovation Solution
A method is introduced where a transmitting STA generates a physical protocol data unit (PPDU) including CCFS information for 80 MHz, 160 MHz, and 320 MHz channels, with specific differences between these segments, and transmits this information through a 320 MHz channel, enabling efficient resource utilization by puncturing patterns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If 320 MHz band is used for high-throughput communication, then bandwidth and data rate are improved, but channel center frequency segment management complexity increases
Solution Approach 1:
The patent divides the 320 MHz channel into multiple 80 MHz band units (primary and secondary bands), and further segments each band unit into resource units (RUs) of different sizes (8x26, 16x26, 32x26, 64x26, or 128x26 subcarriers). This segmentation allows flexible allocation and management of frequency resources, reducing the complexity of handling the entire 320 MHz band as a single large unit while maintaining high throughput capability.
Solution Approach 2:
The patent introduces dynamic puncturing patterns that can be adaptively applied to different band units within the 320 MHz channel. The puncturing patterns are configured based on channel conditions and communication requirements, allowing the system to dynamically adjust which frequency resources are active and which are punctured (set to zero). This dynamic adaptation simplifies frequency resource management by allowing flexible, on-demand configuration rather than fixed allocation.
2Productivity
If puncturing is applied to optimize resource usage, then spectrum efficiency is improved, but signal processing complexity increases
Solution Approach 1:
The patent pre-configures multiple puncturing patterns (first, second, third, and fourth puncturing patterns) that can be applied to different band units before actual transmission occurs. These patterns are defined in advance and stored in the system, allowing the transmitter to simply select and apply the appropriate pre-defined pattern based on channel conditions, rather than calculating optimal puncturing configurations in real-time. This preliminary preparation significantly reduces the signal processing complexity during actual data transmission.
Solution Approach 2:
The patent changes the parameter of frequency resource allocation by applying different puncturing patterns to different band units. Instead of uniformly treating all 320 MHz bandwidth, the system selectively applies puncturing to specific band units based on their characteristics and usage requirements. This parameter change approach allows optimization of spectrum efficiency in specific frequency regions while maintaining simplicity in the overall processing architecture through standardized pattern application.
Data Source
AI summary
In a wireless local area network (WLAN) system, a transmission STA can transmit a PPDU via a 320 MHz channel, and a Medium Access Control (MAC) signal may be generated for the PPDU. The MAC signal may include puncturing pattern information and channel center frequency segment (CCFS) information for a 320 MHz band. The CCFS information may include a first CCFS field related to channel center frequency (CCF) information of a primary 160 MHz channel, and a second CCFS field related to CCF information of a 320 MHz channel.