Wi-Fi Control Channel Isolation for Resource Utilization
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Solution Overview
Problem
In existing Wi-Fi technologies, control information often cannot be sent out in a timely manner due to its lower priority and smaller bandwidth compared to data, leading to inefficient resource utilization, especially when channels are busy.
Innovation Solution
Transmitting data and control information on different channels, with the access point (AP) using a transmission indication to direct the station (STA) to idle channels, and the STA performing control channel searches based on characteristic information to reduce scanning time and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If data and control information are transmitted on the same channel, then channel resource utilization is improved, but control information cannot be sent out in a timely manner due to data occupying the channel
Solution Approach 1:
The patent divides the transmission channel into two separate channels: a first channel for control information and a second channel for data. This segmentation allows control information to be transmitted independently without being blocked by data, resolving the contradiction between channel utilization and control information timeliness.
Solution Approach 2:
The patent extracts control information transmission from the data channel and creates a dedicated control channel. By taking out control information from the mixed data-control channel, the system ensures control information can be sent timely while data continues on its own channel, maintaining overall channel utilization.
2Loss of time
If control information is transmitted on a dedicated channel, then transmission timeliness is improved, but channel resource utilization decreases due to separate channel allocation
Solution Approach 1:
The patent implements multi-functionality where the first channel primarily handles control information but can also transmit data when control information is absent. The second channel primarily handles data but can transmit control information when the first channel is unavailable. This universal approach ensures timely control information transmission while maximizing channel resource utilization through flexible channel sharing.
3Reliability
If the station scans all channels to find the control channel, then channel search reliability is improved, but time and power consumption increase significantly
Solution Approach 1:
The patent applies preliminary action by having the access point embed control channel characteristic information (such as frequency offset or identifier) into data frames transmitted on the second channel. The station extracts this information during routine data reception, allowing it to locate the control channel without exhaustive scanning, thus reducing power consumption while maintaining search reliability.
4Reliability
If multiple first channels are used for control information, then transmission reliability is improved, but device complexity increases due to multiple channel management
Solution Approach 1:
The patent implements feedback mechanisms where the access point monitors the status of multiple first channels and dynamically selects the most suitable channel for control information transmission. The system receives feedback about channel availability and quality, then adjusts its transmission strategy accordingly. This feedback-driven approach improves reliability through channel diversity while managing complexity through intelligent, adaptive selection rather than simultaneous management of all channels.
Data Source
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AI summary
The present invention discloses a data transmission method, including: receiving, by a station (STA) on a first channel, a transmission indication sent by an access point (AP), where the transmission indication is used to indicate that a first frame is transmitted on a second channel, the transmission indication includes transmission information of the first frame, and the transmission information of the first frame includes at least one of a channel frequency, a channel bandwidth, spatial stream information, and a transmission time; and performing, by the STA, listening on the second channel according to indication content of the transmission indication, to receive the first frame sent by the AP. Embodiments of the present invention further provide a related device. Using the embodiments of the present invention can improve resource utilization.