Wireless Device Scan Interval Control for Access Node Detection
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Solution Overview
Problem
Wireless devices in multi-frequency band communication networks face interruptions and reduced data throughput when scanning for alternative access nodes, as they cannot send or receive data while scanning, potentially missing better signal bands due to prolonged scanning durations and high initial signal strengths.
Innovation Solution
A method is implemented where the wireless device calculates a scan interval based on the coverage proportion of overlapping access node areas and application requirements, instructing the device to scan for a second frequency band only when the signal level meets specific criteria, allowing for efficient detection of better signal bands without interrupting ongoing communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the wireless device continuously scans for other access nodes to detect better frequency bands, then the likelihood of detecting better signal bands is improved, but data throughput is reduced due to communication interruptions during scanning
Solution Approach 1:
The patent implements periodic scanning at determined intervals rather than continuous scanning. The wireless device scans for other frequency bands at specific time intervals determined by the access node, allowing data communication to occur during non-scanning periods while still maintaining detection capability during scanning windows.
Solution Approach 2:
The scanning interval is dynamically adjusted based on signal strength conditions. When the current frequency band signal is strong, scanning intervals are extended to reduce interruptions. When signal conditions change, the interval is adjusted to balance detection needs with communication continuity.
2Speed
If the wireless device performs frequent scanning to detect better frequency bands, then the detection speed is improved, but the scanning duration increases causing more communication interruptions
Solution Approach 1:
The patent performs partial scanning by monitoring only specific signal strength thresholds rather than performing exhaustive scans of all frequency bands. The wireless device checks whether signal strength meets predetermined criteria, performing only the necessary detection action rather than complete scanning of all possible bands.
3Productivity
If the wireless device waits for signal strength to meet threshold before scanning, then data throughput is maintained during scanning, but the detection of better frequency bands may be delayed
Solution Approach 1:
The access node pre-determines and provides scanning interval parameters to the wireless device in advance. The wireless device is pre-configured with the scanning schedule and criteria, allowing it to perform scanning at optimal times without waiting for signal conditions to change, thus reducing detection delay while maintaining throughput.
Data Source
AI summary
In operation, it is determined that a wireless device is in communication with a first access node using a first frequency band, and that a first coverage area of the first access node includes at least a portion of a second coverage area of a second access node. A coverage proportion of the first coverage area which includes the portion of the second coverage area of the second access node is calculated, and based on the coverage proportion a scan interval is determined. In addition, based on the determined scan interval and an application requirement of an application running on the wireless device, a signal level criteria is determined. When a signal level of the first frequency band meets the signal level criteria the wireless device is instructed to scan for a second frequency band of the second access node using the scan interval.