MARCH 27, 2015

Meeting AgendaPrototype 1 Design GoalsPrototype 1 DemoFramework OverviewPrototype 2 Design GoalsTimeline Moving ForwardQuestions & Answers

Prototype 1DESIGN GOALS

GoalsDynamic Network Topology Introduce new components without reconfiguring

Framework Scalability Interaction with Cloud Services to store and produce data

Establish Infrastructure to Aggregate DataMultiple inputs and outputs, heterogeneous data

Historical Data StoragePersistent data storage in database

Prototype 1DEMO

Mobile deviceDisconnected Subgraph

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Framework Overview

Shaping the NetworkGraph implementation should use the same concepts as graph designBusiness logic should be decoupled from connection logicThis computational graph abstraction applies to any level of the systemNew devices must be able to connect to the network at runtime

Components

We support three types of components:Processors: an atomic unit of C# code Subgraphs: a fully encapsulated graph, embedded as a node in a larger graphPools: a collection of same-type components, whose members can change at

runtime

Behavior Output channelsInput channels

Processors A processor is a C# class: Input channel provides a callback function to the framework to receive

incoming messagesOutput channel requests a callback function from the framework to send

output messages Start and stop methods manages any services it encapsulates

Consider the processor that encapsulates the connection with the Kinect:On start, the processor uses the Kinect SDK to start a connection.When it receives a photo request, the processor uses the Kinect’s Camera API

to take a photo, and outputs the resulting photo.On stop, the processor uses the Kinect SDK to stop the connection.

What’s in an Application?The Component Classes

Processor ClassesSubgraph ClassesPool Classes

The Application GraphNotes: instances of your componentsEdges: Connections between the nodes

Prototype 2DESIGN GOALS

GoalsComplete Data Aggregation

Synthesize different types of inputs into one or more different types of outputs Increase the amount of data flow

Robust ConnectionsDemonstrate transmission failure and unintentional disconnection recoveryNetwork components directly related can detect device disconnects

System DiagnosticsExpand status logging of components, graphical network topology tool, and

diagnostics tool