320 MHz WLAN Puncturing Layout for CCFS Resource Allocation
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Solution Overview
Problem
Existing wireless local area network (WLAN) systems face challenges in efficiently utilizing a 320 MHz band due to limitations in channel center frequency segment (CCFS) and puncturing pattern information, which hinders optimal resource allocation and communication efficiency.
Innovation Solution
A method involving a transmitting STA that generates a physical protocol data unit (PPDU) with channel center frequency segment (CCFS) and first puncturing pattern information for a 320 MHz channel, including CCFS0, CCFS1, and CCFS2, with specific differences, and determines puncturing for 80 MHz bands within the 320 MHz channel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a 320 MHz band is used in WLAN systems, then the data transmission rate and bandwidth are improved, but the resource allocation efficiency and system complexity deteriorate due to limitations in CCFS and puncturing pattern information
Solution Approach 1:
The 320 MHz channel is divided into multiple 80 MHz band units, and further segmented into resource units (RUs) for precise allocation. The puncturing pattern is divided into multiple fields (first puncturing pattern field, second puncturing pattern field) corresponding to different frequency segments, enabling granular control over resource allocation while managing system complexity.
Solution Approach 2:
The patent introduces a new dimension of control by adding puncturing pattern information at the MAC layer, which operates independently from the physical layer CCFS configuration. This layered approach allows flexible resource allocation without increasing physical layer complexity, resolving the contradiction between bandwidth and allocation efficiency.
2Productivity
If CCFS information is added to support 320 MHz band, then the bandwidth utilization is improved, but the MAC layer information structure becomes more complex
Solution Approach 1:
The CCFS information is merged with the existing MAC layer PPDU structure, specifically integrated into the EHT-SIG field. The puncturing pattern information is combined with channel occupancy time and other control parameters in the same MAC layer frame, allowing enhanced bandwidth utilization without creating separate complex information structures.
Solution Approach 2:
The MAC layer information structure is designed to serve multiple functions: it carries CCFS information for bandwidth identification, puncturing pattern information for resource allocation, and maintains backward compatibility with existing 80 MHz and 160 MHz operations. This multi-functional design avoids creating parallel complex structures.
3Productivity
If puncturing pattern information is included for 80 MHz band units, then the resource allocation efficiency is improved, but the information overhead increases
Solution Approach 1:
The puncturing pattern information is applied locally to specific 80 MHz band units rather than uniformly across the entire 320 MHz channel. The first puncturing pattern field applies to the first 80 MHz band unit, and the second puncturing pattern field applies to the second 80 MHz band unit, allowing efficient resource allocation only where needed while minimizing unnecessary information overhead in unaffected regions.
Solution Approach 2:
The patent uses partial puncturing patterns where only the necessary 80 MHz band units require puncturing information. When a band unit does not require puncturing, the corresponding field can be omitted or set to a default value, reducing information overhead while maintaining the capability for efficient resource allocation where needed.
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.