Millimeter-Wave PPDU Formats With Numerology Upclocking
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Solution Overview
Problem
Existing wireless LAN systems lack efficient methods for transmitting and receiving physical layer protocol data units (PPDUs) in millimeter wave bands, which are crucial for achieving high data rates and low latency.
Innovation Solution
A method and device for defining a PPDU format in a millimeter wave band based on a pre-defined numerology and upclocking application, involving the construction of PPDU formats by repeating training field structures and applying an upclocking factor to support PPDU transmission and reception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If millimeter wave band is used for PPDU transmission, then data rate is improved, but latency is increased due to lack of optimized PPDU format
Solution Approach 1:
The patent applies parameter changes by modifying the PPDU format parameters specifically for millimeter wave band operations. It defines new numerology parameters including subcarrier spacing, cyclic prefix length, and training field structures that are optimized for mmWave characteristics, enabling both high data rates and low latency through tailored parameter configuration
Solution Approach 2:
The patent segments the PPDU format into distinct optimized components for millimeter wave operation. It divides the transmission structure into specific training fields (STF, LTF), signal fields, and data fields with optimized durations and structures, allowing independent optimization of each segment for low latency and high throughput
2Productivity
If PPDU format is optimized for millimeter wave band, then transmission efficiency is improved, but device complexity is increased
Solution Approach 1:
The patent achieves universality by creating a PPDU format framework that can operate across multiple frequency bands. The defined numerology and structure serve both traditional bands and millimeter wave bands, allowing the same device architecture to support multiple operating modes without requiring completely separate hardware implementations
Data Source
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AI summary
Disclosed are a method and a device for performing PPDU transmission and reception based on numerology selection in a wireless LAN system. A method according to an embodiment of the present disclosure may comprise the steps of: configuring a PPDU in a first operating frequency band; and transmitting the PPDU to a second STA. Here, a first PPDU format for the PPDU may include a first STF, a first LTF, an SIG field, and a data field, the first PPDU format may be defined by applying an upclocking element on the basis of a second PPDU format defined for a second operating frequency band, a structure of the first STF may be configured by repeating twice a second STF structure included in the second PPDU format and then applying the upclocking element, and a structure of the first LTF may be configured by repeating twice a guard interval (GI) of a second LTF structure included in the second PPDU format, subsequently repeating twice a part other than the GI in the second LTF structure, and then applying the upclocking element.