Multiple Primary Channel Configuration for Wireless LAN Throughput
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Solution Overview
Problem
Existing wireless LAN systems face limitations in improving throughput and latency performance, especially in dense environments, due to the restriction of having only one primary 20 MHz channel per link.
Innovation Solution
The method involves configuring and indicating multiple primary channels, specifically defining an additional primary 20 MHz channel in addition to the existing one, to enhance resource management and support advanced communication standards like IEEE 802.11be.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If only one primary 20 MHz channel is defined per link, then system simplicity is maintained, but throughput and latency performance cannot be improved in dense environments
Solution Approach 1:
The patent divides the channel configuration into multiple primary channels (first primary 20 MHz channel and second primary 20 MHz channel) instead of using a single primary channel. This segmentation allows the system to allocate multiple primary channels to different STAs or link pairs, thereby improving throughput performance in dense environments by enabling more efficient resource utilization across multiple channels simultaneously.
2Loss of time
If only one primary 20 MHz channel is defined per link, then signaling complexity is reduced, but latency performance deteriorates in dense environments
Solution Approach 1:
By segmenting the channel resource into multiple primary channels, the patent enables parallel data transmission across different channels, which reduces transmission latency. The introduction of multiple primary channels allows for more flexible resource allocation and faster data delivery, compensating for the increased signaling complexity required to manage these additional channels.
3Productivity
If an additional primary 20 MHz channel is defined, then resource management efficiency is improved, but system complexity increases
Solution Approach 1:
The patent implements channel segmentation by defining multiple primary channels that can be independently allocated to different STAs or link pairs. This segmentation improves resource management efficiency by enabling more granular and flexible channel assignment, allowing the system to optimize resource utilization according to specific traffic requirements and channel conditions.
Solution Approach 2:
The patent introduces a new dimension to channel configuration by adding a second primary 20 MHz channel alongside the traditional single primary channel. This dimensional expansion from one to multiple primary channels per link enables the system to operate in a more complex but more efficient resource allocation space, supporting advanced features like multi-channel aggregation and improved spatial diversity.
4Productivity
If multiple primary channels are configured, then bandwidth utilization is enhanced, but control information complexity increases
Solution Approach 1:
The patent segments the control information structure into multiple fields within the UHR Operation element, including a First Primary Channel field and a Second Primary Channel field. This segmentation allows for organized and structured transmission of control information related to multiple primary channels, making it easier to parse and process while maximizing bandwidth utilization across the configured channels.
Data Source
AI summary
Proposed are a method and apparatus for receiving a PPDU by configuring multiple primary channels in a wireless LAN system. Particularly, a reception STA receives control information from a transmission STA. The reception STA receives a PPDU from the transmission STA on the basis of the control information. The control information includes a UHR operation element. The UHR operation element includes multiple primary channel elements. The multiple primary channel elements include first and second fields. The first field includes information regarding the number of first primary 20 MHz channels and second primary 20 MHz channels. The second filed includes information regarding a location of a second primary 20 MHz channel. The location of the second primary 20 MHz channel indicates a location cyclically shifted with respect to a first primary 20 MHz channel.