Wireless Multimedia Delivery over 3G Networks

Wireless Multimedia Delivery over 3G Networks

Greg Leah C SC 461

3G

third generation wireless services offers high data rate content delivery to mobile

devices cellphones PDA’s

enables multimedia applications such as: live TV video/audio streaming video conferencing web surfing

Cellular Technologies

all are different methods of sharing a radio channel

all have concept of multiple access – implies sharing available frequency range with multiple users

Frequency Division Multiple Access (FDMA) frequency is divided between users each user is allocated a different carrier

frequency of the radio spectrum

Time Division Multiple Access (TDMA) users share the same frequency by using

alternating time slots

Code Division Multiple Access (CDMA) data is broken into uniquely identified packets and transmitted over

multiple frequencies uses unique codes to identify connections and reassemble

messages every user uses the entire spectrum all of the time allows most efficient usage of frequency spectrum

Wireless Services History

1Goffered analog voice onlyuses Frequency Division Multiple Access

(FDMA)offered data rates of approximately 9600 bps

Wireless Services History

2Gdigital voice and digital data

digital data applications: text messaging, streaming audio, & electronic publishing

implemented circuit switching technologyuses TDMA (Time Division Multiple Access)

and CDMA (Code Division Multiple Access)peak data rate: 14.4 kbps

Wireless Services History

migration from 2G to 2.5G to assist carriers with upgrading infrastructure transition to 3G

2.5Gvoice and data transmissionenhanced data rates and packet data servicesadopted packet-switching technologypeak data rate: 115 kbps

Wireless Services History

3Gcombination of circuit and packet switching

technologieshigh data rates in addition to voice

transmissionable to achieve data rates between 307 kbps

to 2.4 Mbps

3G Technology

Wideband Code Division Multiple Access (W-CDMA)

Code Division Multiple Access 2000 (CDMA2000)

Time Division-Synchronous Code Division Multiple Access (TD-SCDMA)

Wideband Code Division Multiple Access (W-CDMA) leading global 3G standard 2 sub standards based on CDMA technology:

Freedom of Mobile Multimedia Access (FOMA) world’s first commercial W-CDMA service developed in Japan by NTT DoCoMo

Universal Mobile Telephone System (UMTS) mainly used in countries that use GSM (Europe)

CDMA2000

second generation of CDMA digital cellular technology outgrowth of 2G CDMA, but still backwards compatible substandards:

CDMA2000 1x, CDMA2000 1xEV-DO, and CDMA2000 1xEV-DV

EV-DO → Evolution-Data-Only EV-DV → Evolution-Data-Voice

main 3G technology used in Canada and the United States

Time Division-Synchronous Code Division Multiple Access (TD-SCDMA)

uses a combination of TDMA and CDMA developed and used in China only in an

attempt to develop home-grown technology and not be "dependent on Western technology" for 3G services

Main Challenges

developing reliable protocols to ensure high data rate transmission to mobile devices

developing protocols for pervasive networks to allow handoff between heterogeneous network types

Implementation

content providers all over the world have been rolling out 3G networks for a couple years now

in Canada:Bell and Telus introduced 3G services in late

2005Rogers started offering live TV through

MobiTV in April 2005

3G Handsets

worldwide drive to implement 3G networks is creating demand for more sophisticated handsets

Panasonic 3G Handset

Nokia 3G Handset

Motorola’s Vodaphone 3G Handsets

The Future: 4G

Japanese company NTT DoCoMo is testing 4G communication at 100 Mbps while moving, and 1 Gbps while stationary

plans to roll out in 2010 will be based strictly on packet-switched

technology only while 3G is a combination of packet- and circuit-switching

The Future: 4G

pervasive networks hypothetical concept where users can be

handed off using heterogeneous wireless technologiese.g. cellphone uses WiFi or WiMax when

available, then hands off to UMTS or another cellular technology

Why I think 3G is cool

video delivery to cellphones is a huge marketprojections in multiple billions of dollars

mobile video conferencing is also a cool technology

The End

questions?