A high-level introduction to the Internet of Things (IoT). Architectures and Inter-Vehicle Communication are also covered.

1. Internet of Things
CS5440 Wireless Access Networks
Dilum Bandara
Dilum.Bandara@uom.lk

2. Internet of Things (IoT)
Explore '14 2

3. Internet of Things (IoT)
Explore '14 3

4. Internet of Things (IoT)
• Interconnection of uniquely identifiable
embedded computing devices through networks
 Usually Internet
Explore '14 4

5. IoT Example
5

6. IoT Architectures
6
Source: http://wiki.knoesis.org/index.php/Architecture_for_Open_IoT_Services

7. IoT Architectures (Cont.)
7
Source: http://java.dzone.com/articles/internet-things-iot-reference

8. 8

9. Inter-Vehicle Communication
 For
 Safety
 Traffic updates &
control
 Weather information
 Navigation
 Entertainment
 May or may not rely
on an infrastructure
9
http://www.wired.com/autopia/2011/01/talki
ng-cars-are-coming-soon-to-keep-us-safe/

10. Inter-Vehicle Communication –
Example
10
http://www.team-bhp.com/forum/technical-stuff/122648-savari-bangalore-enabling-inter-vehicle-
communication-safety.html

11. Inter-Vehicle Communication –
Concerns
 Network is not always connected
 Speed
 Arrival rates
 Density
 Delay in message propagation
 Wireless collisions & multi-hop forwarding
 Relative importance of messages
 Safety messages should be given high priority
 Anonymity problem
11

12. Dedicated Short Range
Communication (DSRC)
 Extended from 802.11
Standard
 Extension to 802.11
 Implements message Priority
Scheduler which is required
multi-channel coordination
 Implemets CSMA/CA
 Extension to 802.11a
 Has 10MHz Channel
Bandwidth
 Timing, Frequency & data
rate parameters are
configurable
12
10m
Min. Separation
1000m
Max Range
1-54Mbps
Data Rate
7 channels
Channels
QPSK OFDM
Modulation
75MHz (5.850 – 5.925GHz)
Bandwidth