Analyzed Data

As data for analysis SmartCARE uses various events on the subscriber devices and SmartCARE clients’ operation parameters.

Events Received by SmartCARE for Analysis

Events from Client Applications

• Subscriber authorization attempt (successful and failed)
• Beginning of content viewing (channel, recorded show, movie)
• “Keep alive” event during content viewing (every 2–5 minutes, configurable)
• Start, stop, rewind, pause during content viewing
• Critical low memory
• Finishing of content viewing
• Changing the bitrate during content viewing
• Delay between the request for content and the beginning of its playback
• Start and end of stream buffering
• TV programs change
• Abnormal change in the CPU and memory load
• Abnormal change in the WiFi signal level
• Switch to / from standby mode (for STB)
• Internet connection loss
• User navigation through menu sections in the client interface
• Keypresses on the user’s remote control / keyboard

Analyzing the Streaming Servers’ Logs

• Starting a stream playback
• Switching to another stream
• Bitrate switching (video / audio quality changing)
• Playlist uploading error
• Chunks uploading error

Analyzing the Incoming Stream Recording Servers’ Logs

• Incoming streams recording errors

Parameters Sent Within Events and from External Systems

Parameters within the Client Application Events

• Content ID (channel, program, movie, local file, external VoD content)
• URL of the external VoD content
• Type of content viewed (Live, nDVR, VoD)
• Number of frames with playback and decoding errors
• Event type and its time on the client application
• Frame rate
• Number of frames played
• Number of RAM page access errors
• Number of load buffer underrun events
• Content view start/end time
• time (the time between the content request and the content begins to play, in details)
• Duration of the stream buffering
• Rewind start time, duration and direction (backward / forward) — for TSTV-programs
• Time of TV program change
• Stream bitrate
• Content viewing mode (online / offline)
• Result of content launching (successful or failed)
• Device ID (UID)
• Subscriber ID (SmartTUBE SDP account number)
• Device type (STB, iPad, Android, etc.)
• IP address of the subscriber device
• Version of the client application
• Geo ID received during the authorization (region ID in the middleware dictionary or from the geolocation system)
• Load buffer filling level
• Wi-Fi signal strength (for STB with Wi-Fi module)
• CPU and memory usage (for STB)
• Duration of Internet connection absence
• Amount of free space in critical directories
• Custom fields (up to 10, for optional parameters transmitting)

Parameters within the Streaming Servers’ Logs Events

• Content ID
• URL of the content requested (playlist /chunk)
• Content request result (error or success)
• Amount of information sent to the client application
• Time the event was logged
• Stream bitrate
• Device ID (UID) — if it was sent in the HTTP request
• Subscriber ID (SmartTUBE SDP account number) — if it was sent in the HTTP request
• Full text of the client application User Agent string. Includes the following parameters:
  • version of the client application,
  • type of the subscriber device.

• IP address of the subscriber device

Parameters within the Recording Servers’ Logs Events

• Hostname of the incoming streams recording server
• Recorded channel
• Recording error sign
• Full text of the log entry
• Bitrate of the recorded channels

Parameters from OSS/BSS Systems

• Subscriber ID in OSS / BSS
• Subscriber connection address
• Subscriber device type

Parameters from Zabbix Agents

• Average CPU IOWait of the monitored server (streaming, recording, storage, etc.)

• Incoming / outgoing bitrate of the monitored server network interfaces
• Inbound / outbound utilization of monitored server network interfaces

Parameters From Border Routers

• Autonomous system IDs on the network section between the streaming server and the subscriber device
• Data route change time