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Using Mobile Metrics to Drive Network Analysis on Android Devices

Using Mobile Metrics to Drive Network Analysis on Android Devices. Bo Yan Department of Computer Science University of Massachusetts Lowell. Network Analysis. An important research topic as many communicate via mobile devices Troubleshoot network connectivity Diagnose network performance.

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Using Mobile Metrics to Drive Network Analysis on Android Devices

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  1. Using Mobile Metrics to Drive Network Analysis on Android Devices Bo Yan Department of Computer Science University of Massachusetts Lowell

  2. Network Analysis • An important research topic as many communicate via mobile devices • Troubleshoot network connectivity • Diagnose network performance

  3. What Kind Of Metrics Do We Have • Network metrics • Signal strength • Connection states • Latency and bandwidth • Context information • Location • Geo-coordinates • Cell tower • User Behavior • Indoor/outdoor • Still/moving

  4. Signal Strength • Signal Strength • dBm (or dBmW) is an abbreviation for the power ratio in decibels (dB) of the measured power referenced to one milliwatt (mW) • X = 10 * log10P + 30 expresses an arbitrary power P as x dBm

  5. Cellular Signal Strength - GSM • GSM signal ASU (Active Set Update) • An integer value proportional to the received signal strength • In range from 0 to 30, and 99, defined in 3GPP TS 27.007 8.5 • Signal[dBm] = -113 + 2 * Signal[asu] • GSM Bit Error Rate • In range from 0 to 7, and 99, defined in 3GPP TS 27.007 8.5 • RXQUAL_0, BER < 0.2% • RXQUAL_1, 0.2% < BER < 0.4% • RXQUAL_2, 0.4% < BER < 0.8% • RXQUAL_3, 0.8% < BER < 1.6% • RXQUAL_4, 1.6% < BER < 3.2% • RXQUAL_5, 3.2% < BER < 6.4% • RXQUAL_6, 6.4% < BER < 12.8% • RXQUAL_7, 12.8% < BER

  6. Cellular Signal Strength - CDMA • CDMA RSSI (Received Signal Strength Indication) • Value in dBm • CDMA EC/IO • Value in dB * 10 • The ratio of received pilot energy, Ec, to total received energy, Io. • Ec/Io[dB] = RSSI[dBm] – RSCP[dBm] • EVDO RSSI • Value in dBm • EVDO Ec/Io • Value in dB * 10 • EVDO SNR (Signal to Noise Ratio) • Value in range from 0 to 8 • SNR[dB] = RSSI[dBm] – NOISE[dBm]

  7. Cellular Network States • Call states • IDLE, RINGING, OFFHOOK • Incoming phone number • Data activity • IN, OUT, INOUT, DORMANT • Data connection states • DISCONNECTED, CONNECTING, CONNECTED, SUSPEND

  8. Wi-Fi Network States • Wi-Fi supplicant states • ASSOCIATED, ASSOCIATING, AUTHENTICATING, COMPLETED, DISCONNECTED, DORMANT, FOUR_WAY_HANDSHAKE, GROUP_HANDSHAKE, INACTIVE, INTERFACE_DISABLED, INVALID, SCANNING, UNINITIALIZED • Access Point • SSID and BSSID • link speed

  9. Network Performance • Network Latency • Ping command result • Socket connection latency • Network Goodput • Ping command result • Upload/download test to/from a target server

  10. Location • Geo-coordinates • Latitude and longitude • Help identify dead zone • Cell tower • Report weak signal coverage

  11. User Behavior • Accelerometer Sensor • Infer movement from 3D accelerations • Light Sensor • Day time or mid night

  12. Example – Troubleshoot Network Connectivity

  13. Example – Network Latency

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