Wireless Measurement Device Header-Only Acknowledgment
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Solution Overview
Problem
Measurement devices face challenges in maintaining high data rates during wireless communication measurements due to poor reception environments, leading to frequent frame retransmissions and demodulation issues.
Innovation Solution
A measurement device that adjusts the modulation scheme and coding rate of received frames, allowing only the header to be received under poor conditions, and transmits acknowledgment frames only when the header is properly received, enabling continued high data rate measurements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the measurement device receives frames at high data rates under poor reception conditions, then measurement speed and efficiency are improved, but reception errors occur frequently and high data rate cannot be maintained
Solution Approach 1:
The patent segments the frame reception process into two independent parts: header reception and data reception. The header is received at a lower data rate to ensure reliable acknowledgment transmission, while the data can be received at higher data rates. This segmentation allows the system to maintain measurement speed while ensuring reception reliability through selective acknowledgment based on header-only reception.
2Reliability
If the measurement device uses an amplifier to improve signal reception under poor conditions, then signal strength is improved, but demodulation still cannot be performed due to insufficient SNR
Solution Approach 1:
The patent changes the data rate parameter for header reception to a lower value than for data reception. By transmitting the header at a lower data rate with better signal-to-noise ratio, the measurement device can reliably demodulate and recognize the header even under poor reception conditions, enabling acknowledgment transmission without requiring amplifiers that fail to provide sufficient SNR improvement.
3Productivity
If the measurement device transmits acknowledgment frames only when headers are properly received, then frame retransmission is reduced and data rate is maintained, but measurement accuracy may be affected by selective acknowledgment
Solution Approach 1:
The patent implements a feedback mechanism where the measurement device transmits acknowledgment frames back to the device under test based on header reception status. This feedback allows the device under test to know whether its transmission was successfully received (at least the header), enabling it to maintain high data rates by avoiding unnecessary retransmissions while ensuring measurement accuracy through selective acknowledgment of valid frames.
Data Source
AI summary
A measurement device and a measurement method capable of performing measurement on a device under test while maintaining a desired high data rate even under poor communication conditions such as occurrence of retransmission of a frame from a device under test in a wireless communication connection are provided. The measurement device includes a reception unit 14 that receives a frame transmitted from a DUT 1, a determination unit 16 that determines whether or not a header of the frame has been normally received by the reception unit 14, an acknowledgment transmission unit 13b that transmits the acknowledgment frame to the DUT 1 when the determination unit 16 determines that the header has been normally received by the reception unit 14; and a measurement unit 17 that performs the measurement on the frame determined by the determination unit 16 that the header has been normally received by the reception unit 14.