Wireless LAN Frame Transmission Using Channelized Bandwidth Encoding
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Solution Overview
Problem
Current wireless communication standards, such as IEEE 802.11ad and 802.11ay, face challenges in optimizing frame transmission over multiple channelized channels in wireless local area networks (WLANs), particularly in achieving high throughput and signal quality due to limitations in channel bandwidth utilization and antenna beam alignment.
Innovation Solution
A method for transmitting frames based on a plurality of channelized channels in a WLAN system, where a first wireless terminal configures a control mode physical protocol data unit (PPDU) with encoded information on channel bandwidth for sequentially arranged channels, using five bits to indicate channel bandwidth, and transmits this PPDU to a second wireless terminal, enabling improved channel bonding and aggregation schemes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If channel bandwidth is increased to improve throughput, then data transmission rate is improved, but channel allocation complexity increases
Solution Approach 1:
The patent segments the frequency band into multiple channelized channels (first to sixth channels) with different bandwidth configurations. Instead of using a single wide channel, the system divides the spectrum into smaller units that can be individually allocated and combined, reducing the complexity of managing large bandwidth allocations while maintaining high throughput capability.
Solution Approach 2:
The patent implements dynamic channel allocation where the bandwidth configuration can be adjusted based on transmission requirements. The system can dynamically select different channel bandwidth modes (e.g., 2.16 GHz, 4.32 GHz, 6.48 GHz) and allocate channels sequentially on the frequency domain, allowing flexible adaptation to different throughput demands without fixed complex configurations.
2Productivity
If multiple channels are bonded to increase bandwidth, then throughput is improved, but signal quality control becomes more difficult
Solution Approach 1:
The patent applies different bandwidth configurations to different channel groups (first to third channels, fourth to sixth channels) with specific 2.16 GHz allocations. Each channel group maintains optimized signal quality characteristics for its specific bandwidth, while channel bonding combines these locally optimized channels to achieve high throughput without compromising individual channel signal quality.
3Measurement precision
If channel bandwidth encoding uses more bits to represent larger bandwidths, then channel bandwidth precision is improved, but control mode PPDU overhead increases
Solution Approach 1:
The patent changes the encoding parameters by allocating five bits specifically for channel bandwidth information in the control mode PPDU. This encoding scheme efficiently represents multiple bandwidth configurations (2.16 GHz, 4.32 GHz, 6.48 GHz, and combinations) using a compact five-bit field, achieving precise bandwidth specification without excessive overhead compared to more comprehensive encoding schemes.
Data Source
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AI summary
A method for transmitting a frame on the basis of multiple channelized channels in a wireless LAN system according to one embodiment of the present specification comprises the steps of: configuring, by a first wireless terminal, a control mode physical protocol data unit (PPDU) including encoding information on a channel bandwidth formed on the basis of first to sixth channels sequentially arranged on the frequency axis, wherein five bits are assigned for the encoding information and each of the first to sixth channels has a bandwidth of 2.16 GHz; and transmitting, by the first wireless terminal, the control mode PPDU to a second wireless terminal on the basis of the channel bandwidth.