Introduction to mobile services like mobile IPTV, mobile social networking, and location-based services

1. Mobile Services
CS4492 Wireless and Broadband Networking
Dilum Bandara
Dilum.Bandara@uom.lk

2. Outlines
 Mobile IPTV
 Mobile social networking
 Location-based services
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3. Internet Protocol Television (IPTV)
 2 kinds of Internet Protocol Television
1. IPTV
 Supplied by a broadband operator using a closed
network infrastructure
 Need a massive connectivity infrastructure upgrade
 User experience is bound to their living rooms & set-top
boxes
2. Internet Television
 Delivery of TV content over Internet
 Anyone can create an endpoint & publish that on a
global basis
 Publisher has a direct communication channel to
consumer
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4. IPTV (Cont.)
 Live TV
 Multicasting
 Application layer – Client/Server mode
 Network layer – Internet Group Management Protocol (IGMP)
version 2
 Need support from multicast routers
 P2P
 Emulate an IP multicast tree at application layer
 No multicast routers required
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5. IPTV (Cont.)
 Video on Demand – time shifted
 Use Real Time Streaming Protocol (RTSP) as
application layer
 Use Real-time Transport Protocol (RTP) & Real-time
Transport Control Protocol (RTCP) as transport
protocol
 Applications using RTP are less sensitive to packet loss,
but typically very sensitive to delays
 So UDP is a better choice than TCP for such
applications
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6. IPTV Over Wireless
 Coding
 H.264
 Networking
 Application layer – RTSP
 Transportation layer – RTP/RTCP/UDP/NAT/STUN
 IP layer – Mobile IP
 Connectivity
 MAC layer – 802.11g/802.11e/802.11i/802.11n
 Physical layer
 System consideration
 Platform & CPU capability
 Operation system 6

7. IPTV – Networking Issues
 P2P issue
 Network Address Translators (NAT) protocol block data
transmitted directly between 2 clients under different
private networks
 RTP uses a dynamic port range makes it difficult for it
to traverse firewalls
 Solutions
 Simple Traversal of User Datagram Protocol (STUN)
 Traversal Using Relay NAT (TURN)
 Roaming issue
 Roaming from one area to another with different IP
subnet
 Solution – Mobile IP
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8. Mobile Social Networking
 Use of social network services on mobile devices
 Why?
 Increased use of mobile devices
 Integration of Internet services
 Generate & share contents on the go
 Billion dollar industry
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9. Mobile Social Networking
Technologies
 SMS/MMS
 Blogging, Messaging, Wall posting
 Simple, easy to use, bandwidth efficient
 Relatively costly
 HTML
 All most anything
 Relatively cheap
 Need more complex hardware & software
 Social Mapping
 Base station or GPS based
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10. Location-Based Services
 Information services accessible with mobile
devices through mobile network & utilizing ability
to make use of location of mobile device
 Virrantaus et al., 2001
 A wireless-IP service that uses geographic
information to serve a mobile user. Any
application service that exploits position of a
mobile terminal
 Open Geospatial Consortium (OGC, 2005)
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11. Why?
 To answer
 Where am I ?
 What is near by ?
 How can I go to ?
 Is there a place to park?
 Is the road ahead busy?
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http://www.telecomcircle.com/20
09/06/introduction-to-lbs/

12. Integration of 3 Technologies
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Source: http://technowizz.wordpress.com/2010/01/03/lbs-technologies-part-1/

13. Location Technologies
 Network-based
 Technologies that exploit cellular infrastructure to
obtain geo-location information
 Handset-based
 Location intelligence is stored within terminal
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Source: http://technowizz.wordpress.com/2010/01/03/lbs-technologies-part-1/

14. Overall Architecture
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Source: http://www.ibm.com/developerworks/websphere/library/techarticles/0205_bennett/bennett.html