320 MHz WLAN Puncturing for Efficient 240 MHz Transmission
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Solution Overview
Problem
Existing wireless local area network (WLAN) systems face challenges in efficiently utilizing a 320 MHz band for communication, particularly in the context of the emerging extreme high throughput (EHT) standard, which requires improved bandwidth management and resource allocation.
Innovation Solution
The proposed method involves generating a physical protocol data unit (PPDU) with channel center frequency segment (CCFS) information and puncturing pattern information for a 320 MHz channel, allowing for efficient resource utilization through puncturing techniques.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a 320 MHz channel is used for transmission, then the bandwidth and data transmission rate are improved, but the resource utilization efficiency deteriorates due to potential interference and collision in the 80 MHz band units
Solution Approach 1:
The patent extracts and identifies specific 80 MHz band units within the 320 MHz channel that are prone to interference or collision, and marks them for puncturing. By removing these problematic frequency segments while maintaining transmission through the remaining clean segments, the system achieves efficient resource utilization without sacrificing overall transmission rate.
Solution Approach 2:
The patent applies different transmission characteristics to different segments of the 320 MHz channel. Specifically, it identifies which 80 MHz band units should be punctured based on local interference conditions, allowing the system to optimize transmission quality locally in each frequency segment while maintaining overall system performance.
2Productivity
If puncturing is performed in the 80 MHz band units, then the resource utilization efficiency is improved, but the transmission reliability may deteriorate due to potential data loss in punctured segments
Solution Approach 1:
The patent performs preliminary identification and marking of 80 MHz band units that require puncturing before actual data transmission begins. By pre-determining which frequency segments should be punctured based on interference patterns and channel conditions, the system can proactively avoid data loss in those segments while maintaining reliable transmission in the remaining segments.
3Adaptability or versatility
If CCFS information is transmitted for all band units, then the adaptability to different channel conditions is improved, but the signaling overhead increases
Solution Approach 1:
Instead of transmitting CCFS information for all 80 MHz band units within the 320 MHz channel, the patent applies partial action by only transmitting CCFS information for the specific band units that require puncturing or have special channel conditions. This selective approach reduces signaling overhead while maintaining sufficient adaptability for the critical frequency segments.
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.