SensorFlow

A framework for the unified sensor-data streams management. The framework is composed of two blocks:

1. Real-life sensing
2. Data management

Issues

1. Heterogeneity: of devices, protocols, cloud solutions and applications
2. Synchronization
3. Security/privacy

Key paradigm: Modularity and common interfaces

Components:

• BSN Manager (BSNM)
• Input Module
• Output Module
• Processing Module
• User Interface

Data types:

• Signals: Series of (timestamp,value) pairs conveying the information from the sensors
• Metadata: Information about the composition of the BSN and characteristics of the collected signals
• Messages: Series of (timestamp, {event}) pairs that describe the status of the network with possible errors. Used by the modules to communicate their current status to the BSNM.

Components

BSNM

Manages the BSN through the connected modules. Main functions:

• Set the BSN and provide a time reference to the input plugins for the synchronization (together with latency estimation)
• Check the status of the BSN
• Start and stop the acquisition

Input Module

Manages the input protocols and exposes a common interface to the BSNM. Two distinct functions:

• Interfaces with the device
• Manages the data streams

Output Module

Manages the output protocols and exposes a common interface to the BSNM according to the application Two distinct functions:

• Interfaces with the destination
• Manages the security/privacy

Processing Module

Provides real-time capabilities Two types:

• (quasi) Real-Time
• Post-acquisition

User Interface

Exploits the BSNM to allow the user to set the BSN

Development plan

API::DJango Rest Server

• DJango admin [Done]
• Authenticate users via token [Done]
• Provide profile info [Done]
• Provide tokens to crossbar for auth
• Browse uploads
• User MRUs
• Browse experiments and sessions
• Browse plugins

Researcher::WebGUI

• Data management & download
• Session management: experiments and if they have real time feedback
• Plugin management
• Account management

Experimenter::Mobile

• Authenticates [Done]
• Uploads data (September)
• Receives feedback

Plugin::Remote Client

• Authenticates
• Receives data through WebSocket/MQTT

Database::MongoDB Server

• Design schema [Done]
• Define data ("Collection")