Plume Design, Inc.

Pctel, Inc.

Thomas Paul

Balaji Rengarajan

Igal Gutkin

Di Zhou

Long Wang

A method of evaluating an application performance metric of a Wi-Fi device that is running an application and that is receiving application data from another Wi-Fi device transmitting the application data is disclosed. An indication of a delay in one or more of a plurality of access category queues at the Wi-Fi device transmitting the application data is received. The delay over time is characterized, wherein the characterization of the delay over time includes a statistical measure of the delay determined based on the received indication of the delay in the one or more of the plurality of access category queues. An application quality-of-experience (QoE) metric is determined based on a mapping from the characterization of the delay over time to an application performance.

Application quality of experience metric

A host signal processing (HSP) modem or transceiver includes a transmit buffer and a receive buffer. The transmit buffer stores multiple blocks of information representing a transmit signal, and the receive buffer includes available space for multiple blocks of information representing a receive signal. Each block of information corresponds to its respective signal for an associated period that spans the time between consecutive interrupts for the HSP modem. When the host computer fails to service one or more interrupts, the hardware portion of the HSP modem uses the reserve of information from the transmit buffer to generate the transmit signal and stores one or more blocks of information representing the receive signal in the receive buffer. Accordingly, the HSP mode maintains the connection and data throughput even when the host computer misses interrupts. When the host computer services an interrupt, the modem software determines the number of interrupts missed and then dynamically selects the amount of data to process in an attempt to fill the transmit buffer and empty the receive buffer. The amount of information that the modem software processes in response to a single interrupt can be limited so that the transmit buffer is filled and the receive buffer is emptied over a series of serviced interrupts.

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Santa Clara, CA, United States of America

Thomas Paul