WLAN Multi-Link Operation Modes for STR Interference Management
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Solution Overview
Problem
Existing wireless local area network (WLAN) systems face challenges in optimizing operation modes for multi-link communication, particularly in the context of emerging standards like IEEE 802.11be (EHT), which require efficient use of increased bandwidth and advanced PHY layer protocols.
Innovation Solution
A method for setting operation modes in a WLAN system that allows stations (STAs) to support multi-link operations, enabling simultaneous signal transmission and reception (STR) or non-STR modes, with dynamic mode switching based on capability information and negotiation with the access point (AP).
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the STA operates in STR mode on all links, then the network throughput is improved, but interference between simultaneous transmission and reception occurs
Solution Approach 1:
The patent applies local quality by allowing different links to operate in different operation modes (STR or non-STR) based on their specific characteristics and requirements. Each link can be independently configured to operate in STR mode when it can handle simultaneous transmit and receive operations, or in non-STR mode when it cannot, thereby optimizing overall network performance while avoiding interference on links that are susceptible to it.
2Device complexity
If the operation mode is fixed for each link, then the device complexity is reduced, but the adaptability to different link requirements deteriorates
Solution Approach 1:
The patent implements dynamics by enabling the operation mode of each link to be dynamically adjusted based on current network conditions, link characteristics, and capability information. The AP can change the operation mode of specific links as needed, allowing the system to adapt to varying requirements while maintaining manageable complexity through centralized control.
3Adaptability or versatility
If the STA supports multiple operation modes, then the adaptability to different scenarios is improved, but the device complexity increases
Solution Approach 1:
The patent uses the AP as an intermediary to manage the complexity of multi-mode operations. The STA provides its capability information to the AP, and the AP makes the decisions about which operation mode to use on each link based on overall network conditions. This centralizes the complexity management at the AP, allowing the STA to support multiple modes without bearing the full burden of managing them all.
Data Source
AI summary
In a wireless local area network (WLAN) system, a station (STA) may support a multi-link. The STA may generate a PDDU including operation mode information on whether transmission of a signal and reception of a signal can be performed simultaneously. The STA may transmit the PPDU.