Guard Interval Standardization for WLAN PPDU Data Fields
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Solution Overview
Problem
The technical problem is to provide a method and device for transmitting or receiving a Physical Layer Protocol Data Unit (PPDU) with a guard interval applied to different fields of a PPDU in a Wireless Local Area Network (WLAN) system, specifically for defining a guard interval for a part including a data field of a PPDU.
Innovation Solution
A method performed by a first station (STA) in a WLAN system includes receiving a PPDU with multiple fields, decoding these fields to obtain a Medium Access Control (MAC) Protocol Data Unit (MPDU) from the data field, and applying a predefined single value guard interval to the data field. Similarly, a second STA encodes the PPDU with a predefined guard interval for the data field and transmits it.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If different guard interval values are applied to different fields of PPDU to optimize performance, then transmission reliability and adaptability are improved, but device complexity and implementation difficulty increase
Solution Approach 1:
The patent applies different guard interval values to different fields within the PPDU structure. Specifically, the data field can use a first guard interval value while the non-data fields use a second guard interval value, allowing each field to be optimized independently for its specific requirements rather than using a uniform guard interval for the entire PPDU.
Solution Approach 2:
The PPDU is segmented into different fields (data field and non-data fields) that can be configured with different guard interval values. This segmentation allows the system to apply appropriate guard interval settings to each field based on its specific transmission requirements, improving overall reliability without requiring complex reconfiguration of the entire structure.
2Productivity
If variable guard interval values are used for different fields of PPDU, then transmission efficiency and adaptability are improved, but ease of operation and standardization become more difficult
Solution Approach 1:
The patent enables dynamic configuration of guard interval values for different fields based on transmission requirements. The system can selectively apply different guard interval values to the data field versus non-data fields, allowing flexible adaptation to varying channel conditions and transmission demands while maintaining operational simplicity through standardized configuration methods.
Data Source
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AI summary
Disclosed are a method and device for transmitting or receiving a guard interval-based physical layer protocol data unit (PPDU) in a wireless LAN system. A method performed by a first station (STA) in a wireless LAN system, according to one embodiment of the present disclosure, comprises the steps of: receiving, from a second STA, a physical layer protocol data unit (PPDU) including first one or more fields and second one or more fields, wherein the first one or more fields include one or more non-legacy signal (SIG) fields and the second one or more fields include a data field; and decoding the first one or more fields and the second one or more fields, and obtaining a medium access control protocol data unit (MPDU) on the basis of the data field, wherein a guard interval value for the second one or more fields may be predefined as a single value.