1. SDN Based IoT-Cloud Comm.
Presented By: Devendra K Lavaniya ( )
Bradley Quadros ( )
(Collaborating with Gouxi Wang )

2. Introduction :
Currently, IoT sensors directly connect to the Cloud and off-load all data in real time.
Consequence : Link/device Failures leads to loss of data.
Solution : Implement a robust policy framework for IOT-Cloud communication.
Using the concept of edge networking for transient storage & SDN for policy based forwarding.

3. Architecture

4. Implementation
Different sensor devices connected to the cloud using a OpenFlow enabled switch.
Switch communicate with a SDN controller and Edge servers (One or more).
SDN controller intercepts the data and creates flow to the cloud using OpenFlow protocol. Additionally data is cached in edge server for limited time (using ‘TTL’).
Controller detects link/device failures when no Ack received and forward cached data from edge server without any delays.
More complex and granular control over what data to forward to cloud can also be implemented.

5. Deliverables Test Environment : Test Case :
Extreme SDN Controller (OpenDayLight based)
Extreme Openflow Switch (OVS based)
4-8 Different IoT sensors
Edge Server (Virtual server implemented within Controller)
Test Case :
SCALE server provides real-time sensor readings from the cloud.
If connection fails (manually disconnect), readings within failure period are cached at edge server and sent to cloud as soon as connection is up.
SCALE receives all readings with correct timestamps without re-querying.

6. Future Work
Adding more functionalities to the SDN based flows to implement a comprehensive policy framework for secure, flexible and robust communication.
More granular control over data forwarded to cloud.
Location aware edge-server placement for large scale deployment.