Dual-Radio Parallel Active Scan for Wireless Network Discovery
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Solution Overview
Problem
Conventional wireless network scanning methods are time-consuming due to sequential channel scanning, which can take longer than necessary to discover and access available networks.
Innovation Solution
The implementation of a fast parallel active scan (FPAS) technique using two radios, where a main radio and a scan radio operate simultaneously to transmit and receive probe requests and responses across multiple channels, reducing scanning time through a fast channel switch mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If sequential channel scanning is used, then device complexity is reduced, but scanning time increases significantly
Solution Approach 1:
The scanning function is segmented into two separate radio units: a main radio that transmits probe requests and a scan radio that receives probe responses. This segmentation allows simultaneous transmission and reception operations across multiple channels, reducing total scanning time while distributing functional complexity across specialized components.
Solution Approach 2:
The patent transitions from a single-radio sequential scanning approach to a dual-radio parallel scanning system, adding a spatial/dimensional aspect to the scanning architecture. By operating in two parallel radio channels instead of one sequential channel, the system achieves dimensional expansion that enables concurrent operations.
2Speed
If fast channel switching is implemented, then scanning speed improves, but reliability may deteriorate due to potential missed responses
Solution Approach 1:
By separating transmission and reception functions into different radio units, the system can switch channels for transmission without affecting reception operations. This segmentation allows aggressive channel switching at transmission points while maintaining continuous monitoring at reception points, achieving high speed without sacrificing reliability.
Solution Approach 2:
The scan radio continuously monitors channels and prepares to receive responses before the main radio completes its probe request transmission. This preliminary positioning of the scan radio ensures that responses are not missed during fast channel switching, as the receive function is already in place and ready to capture incoming probe responses.
Data Source
AI summary
Systems and methods of scanning for wireless networks can use a wireless integrated package including a first radio and a second radio. The method includes providing a first probe request in a first time slot on a first channel using the first radio, and receiving a first probe response in a second time slot on the first channel using the second radio. The second time slot is at least partially contemporaneous with the first time slot. Fast parallel active scanning can be achieved.