Wireless Channel Puncturing Signaling via Non-Legacy Management Frames
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Solution Overview
Problem
Existing wireless communication systems face challenges in reliably signaling puncturing events to stations (STAs) within a basic service set (BSS), leading to potential interference and signal degradation due to continued use of punctured subchannels.
Innovation Solution
The system employs an apparatus and method for wireless communications that includes determining a puncturing event associated with a subchannel and transmitting management frames with non-legacy elements to indicate the puncturing event to STAs before its start. Upon the start of the puncturing event, the system refrains from transmitting data via the punctured subchannel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the system continues to transmit data via a subchannel after puncturing is determined, then data transmission productivity is maintained, but interference and signal degradation occur due to continued use of the punctured subchannel
Solution Approach 1:
The system performs preliminary action by determining the puncturing event and transmitting management frames to notify STAs before the actual data transmission is affected. The access point determines the puncturing event (e.g., due to channel conditions or interference) and proactively informs stations via management frames containing puncturing information, allowing stations to prepare for the upcoming subchannel unavailability and avoid transmitting on the punctured subchannel, thus preventing interference while maintaining overall transmission productivity
2Device complexity
If the system notifies STAs of puncturing events using traditional signaling methods, then the notification process is simple, but reliable signaling is insufficient leading to continued use of punctured subchannels
Solution Approach 1:
The system introduces an intermediary mechanism by using management frames as a dedicated communication channel between the access point and stations. These management frames serve as an intermediary carrier that reliably transports puncturing event information. The frames include specific fields (such as duration, type, and subchannel identification) that structure the puncturing information, ensuring stations receive and correctly interpret the notification. This intermediary approach enhances reliability while maintaining manageable complexity through standardized frame structures
3Object-affected harmful factors
If the system refrains from transmitting data via the punctured subchannel, then interference is prevented, but data transmission capacity is reduced during the puncturing event
Solution Approach 1:
The system applies segmentation by dividing the wireless channel into multiple subchannels and enabling selective puncturing of only the affected subchannel while maintaining operation on other subchannels. Instead of shutting down the entire channel when one subchannel requires puncturing, the access point segments the transmission and allows data to continue flowing through unaffected subchannels. This selective approach prevents interference on the punctured subchannel while preserving overall transmission capacity through parallel operation on remaining subchannels
Data Source
AI summary
This disclosure provides methods, devices and systems for transmitting and receiving, between an access point (AP) and one or more stations (STAs) in a basic service set (BSS), an indication of a puncturing event. In some examples, the transmitting and receiving may use non-legacy elements configured to provide information about the puncturing event. In certain aspects, the disclosure provides methods for transmitting and receiving, between the AP and one or more STAs, an indication of an operating band switch. In some examples, the transmitting and receiving may use non-legacy elements configured to provide information about the operating band switch.