Internet of things: Next evolution of the Internet Cisco blog - - PowerPoint PPT Presentation

▶

Aug 18, 2022 304 likes •525 views

6PANview : A Network Monitoring System for the Internet of Things 23-August-2011 Lohith Y S, Brinda M C, Anand SVR, Malati Hegde Department of ECE Indian Institute of Science Bangalore Funded by DIT, Government of India Internet of

SLIDE 1

6PANview: A Network Monitoring System

for the “Internet of Things”

23-August-2011 Department of ECE Indian Institute of Science Bangalore

Funded by DIT, Government of India Lohith Y S, Brinda M C, Anand SVR, Malati Hegde

SLIDE 2

Internet of things: Next evolution of the Internet

Cisco blog quotes: “ The number of devices connected to the Internet exceeded the number of people on Earth” Internet is going beyond connecting people or information sharing among them!!! Internet is now about connecting physical items i.e. M2M Communication So how the future Internet looks like ?

SLIDE 3

SLIDE 4

SLIDE 5

Let us first see the inherent challenges

 Deployed in unattended and not easily accessible

environment



Because of nature of devices and wireless medium they are inherently unreliable

 Operates on resource constrained low power tiny devices 

Limited processing (CPU, memory)



Potentially deployed in large scale

SLIDE 6

What technologies make it possible?

Need any new technology? Well proven IP and PAN and sensor technologies are there already Ipv6 and 802.15.4

SLIDE 7

Overview of 6LoWPAN

Challenges 6LoWPAN’s Solutions

Frame size issues Header Compression MTU issues Fragmentation Routing L2 and L3 routing Addressing Stateless address auto-configuration

SLIDE 8

MTU and Routing Issues

SLIDE 9

Putting it all together

SLIDE 10

RPL : Routing over Low Power Lossy Networks

 RPL : IETF’s IPv6 routing protocol for low power networks  RPL considers dynamic characteristics of the wireless

channel, and WSN node constraints

 Routing over rank based DODAG tree  Provides application specific routing  RPL is strictly compliant with layered IPv6 architecture  Supports MP2P,P2MP,P2P traffic  Autonomous operation :RPL nodes independently and

autonomously discover network topology ,computes and install routes without administrative interaction

SLIDE 11

DAG Construction:

 Node multicast solicitation

messages(DIS) to join the network

 Nodes which have the route

reply to DIS by RA (DIO), also nodes periodically emitting RAs

 Nodes who hear RAs evaluate the

OCP and other information before deciding to join the DAG

 Nodes join the DAG by accepting the

advertised node as its parent

SLIDE 12

6PANview

SLIDE 13

WSN Monitoring

 WSN is expected to work “autonomously”  WSN is expected to self organize and self manage  Does this happen in real world deployment ?  ‘Nature is unpredictable’ (Node Failures,

Dynamic Topology, Disconnected Network…)

 Monitoring WSN network itself becomes essential

SLIDE 14

SLIDE 15

6PANview Architecture

SLIDE 16

6PANview Overview

SLIDE 17

Deploying Challenges

 Very limited debugging mechanisms and tools  Present available stack is unstable  Very less memory  Simulation does not produce exact results  Very less deployed networks

SLIDE 18

Ongoing work

Scheduling Monitoring Activity

 Minimise Radio Interference caused to critical WSN applications  Maintain reliability and QoS requirement of WSN applications (Industry, Healthcare)  Based on the current application traffic adaptively  Identify Low or Idle time intervals through traffic modelling/measurement and

adaptively schedule the monitoring

 Query staggering to avoid congestion and improve reliability in the case of

asynchronous events Master agent overlay network

 Master Agent Placement  Separate Radio Channel  Time slotted channel switching between the application and monitoring  Uses different RPL instance with its own OF

Caching

 Minimises the number of queries into the network  Accuracy vs. Energy trade-off  Context sensitive refresh times for monitor parameters

Extensive Traffic Analysis and Anomaly Detection

SLIDE 19

Conclusion

 6PANview has the potential to become one of the first

efforts in the area of WSN monitoring over the Internet

 6PANview system is envisaged to provide rich set of WSN

monitoring statistics, trouble-shooting alerts, performance metrics, time series plots and so on

 6PANview presents all these information on a user friendly

java/web based GUI for WSNMS and all end users

 The source code of 6PANview can be downloaded from

http://sourceforge.net/projects/sixpanview

 Visit us at http://www.ece.iisc.ernet.in/6panview

SLIDE 20