Wireless LAN PPDU Numerology Selection for Millimeter-Wave Bands
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Solution Overview
Problem
Existing wireless LAN systems face challenges in achieving high data rates and low latency, particularly in millimeter wave bands, due to limitations in PPDU transmission and reception methods.
Innovation Solution
The method involves selecting a numerology-based bandwidth configuration by applying different upclocking factors to different bandwidth candidate groups, allowing for optimized PPDU transmission and reception in wireless LAN systems, especially in millimeter wave bands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single upclocking factor is applied to all bandwidth candidates, then the system complexity is reduced, but the adaptability to different frequency bands and traffic requirements deteriorates
Solution Approach 1:
The patent implements dynamic selection of upclocking factors based on operating conditions. The system can choose between first upclocking factor (applied to first bandwidth candidate group) and second upclocking factor (applied to second bandwidth candidate group) depending on the frequency band and traffic requirements, making the system adaptable without being overly complex
Solution Approach 2:
The patent changes the upclocking factor parameter based on different operating scenarios. By defining multiple upclocking factors and selecting appropriate ones based on frequency band and traffic type, the system achieves adaptability to different conditions while maintaining manageable complexity through structured parameter selection
2Productivity
If higher bandwidth is used for PPDU transmission, then the data rate is improved, but the latency increases due to larger processing requirements
Solution Approach 1:
The patent applies partial upclocking selectively to specific bandwidth candidates based on traffic requirements. Instead of uniformly upclocking all bandwidths, the system applies different upclocking factors to different bandwidth candidate groups, achieving high data rates when needed while avoiding excessive processing latency for less demanding traffic
Solution Approach 2:
The patent segments bandwidth candidates into different groups (first bandwidth candidate group and second bandwidth candidate group) with different upclocking factors. This segmentation allows the system to optimize data rate for specific bandwidths without incurring processing latency overhead for all bandwidths, resolving the contradiction between high data rate and low latency
Data Source
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AI summary
Disclosed are a method and device for performing PPDU transmission and reception based on numerology selection in a wireless LAN system. The method performed by a first STA in a wireless LAN system according to an embodiment disclosed herein may comprise the steps of: receiving a PPDU, including information indicating one of multiple bandwidth candidates, from a second STA; and processing the PPDU in the bandwidth indicated by the information. Here, the multiple bandwidth candidates may be defined so as to be composed by applying a first upclocking element to a first bandwidth candidate group, and at least one of the multiple bandwidth candidates may be defined so as to be composed by applying a second upclocking element to a second bandwidth candidate group instead of applying the first upclocking element.