video telephone in 3g

7/31/2019 Video Telephone in 3g

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LOGO

VIDEO TELEPHONE IN 3G

Teacher: Trng Thu HngStudents: Group 2


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MAIN CONTENT

Technology overview

Call flow example

3G Video Telephony deployments


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Technology overview


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Technology overview

Motivation

Protocol

Channels

QoS

Introduce


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Technology overview Introduce

ABOUT 3G

3G the Third Generation technology of 3GPP.

It support:

- high speed data service packet- multimedia service

- connect to internet

- Video Streaming, video conference

- email

- navigational map

- etc


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What is video

telephony?


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Videotelephony comprises the technologies for

the reception and transmission of audio-video

signals by users at different locations, for

communication between people in real-time.


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Technology overview Motivation

Videotelephony in the 21st century, as imagined in1910


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The world's first public video telephone service

was developed by Dr. Georg Schubert.


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Nowadays, the widest deployment of video

telephony now occurs in mobile phone.


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As nearly all mobile phones supporting UMTS

networks can work as videophones using their

internal cameras, and are able to make video

calls wirelessly to other UMTS users in the same

country or internationally

As of the second quarter of 2007, there are over

131 million UMTS users on 134 networks in 59

countries.


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ProtocolTechnology overview

Videoconferencing in the late 20th century was

limited to the H.323 protocol

Another protocol used by videophones is H.324,

which mixes call setup and video compression.

3G video telephony is possible using the 3G-

324M protocol over a circuit-switched

connection.


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3G-324M overview

3G-324M is based on the ITU H.324 standard

and is designed to send several differentchannels over low bit rate networks.

The 3G-324M point-to-point protocol is usually

used to open single audio and video channels

between two handsets. This limits the features

and capabilities of mobile video telephony.


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3G-324M is composed of the following sub-protocols:

ITU-T H.245 for call control

ITU-T H.223 for bit streams to data packets

multiplexer/demultiplexer

ITU-T H.223 Annex A and B for error handling of

low and medium BER detection, correction and

concealment

ITU-T H.324 with Annexes A and C for operating

in wireless environment


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The 3G-324M specification using the Circuit switched

network allows delay sensitive conversational

multimedia services such as:

Videoconferencing for personal and business use

Multimedia entertainment services

Telemedicine

Surveillance

Live Video Broadcasting Cable TV On-the-Go

Video-on-demand (movies, news clips)


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Technology overview Channels

There are 4 channel in 3G-324:

Control channel

Video channel

Audio channel

Data channel


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Control channel

Audio channel

Video channel

Data channel



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Control channel

It pass control commands and indications to

remote counterparts.

Terminal-to-modem control conforms to [ITU-

T V.250]

Terminal-to-terminal control is according to

[ITU-T H.245]



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Audio channel

It use for tranfer audio signal

All ITU-T H.324 terminals offering audio

communication shall support both the high

and low rates of the ITU-T G.723.1 audio

codec. ITU-T G.723.1 receivers shall be

capable of accepting silence frames



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Video channel

It use for traffer video signal

All ITU-T H.324 terminals offering videocommunication shall support both the ITU-T

H.263 and ITU-T H.261 video codecs

There are five standardized image formats:

16CIF, 4CIF, CIF, QCIF and SQCIF



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Data Channal

All data channels are optional. Standardized

options for data applications include: ITU

TT.120,ITU-TT.84,ITU-TT.434,ITU-

TH.224,ITU-TT.30 ,ITU-TT.140;



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Technology overview QoS

What is Quality of Service?

Quality of Service carries different

connotations for different people

It is the end users who pay for the service,

and whose perspectives matter most. From

an endusers

perspective, QoS defines thecharacteristics of service delivery that impact

most critically his/her perception of the

service


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The three main characteristics of a network

delivering QoS to an end user are as follows:

Availability of the service

Quality of information

Consistent delivery



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At a technical level, QoS is characterized by a

set of measurable parameters such as:

Service availability

Delay

Delay variation

Throughput

Packet loss rate



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UMTS QoS Classes: UMTS define four differentclasses:

Conversational class.

Streaming class.

Interactive class.

Background.



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Call flow example


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Call flow example

General callflow of CS

UE callanother UE

UE callPSTN

PSTN callUE


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Call flow exampleUE call another UE


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Call flow exampleUE Call Another UE


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Call flow example PTSTN Call UE


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3G Video Telephony Deployments


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3G VIDEO TELEPHONE DEPLOYMENTS

1. In Vietnam

2. In Foreign Networks


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Now, Vietnam has 16 million 3G subscribers, representing 15% ofthe national population. For those who use the non-smartphone, 14%will use data services, while 48% of smartphone users will use theregistration data services. Value-added services will be difficult todevelop without a device and a platform necessary to use it

The basic elements: Smart: Provide different service quality with flexible service package

costs so as to maximize revenue

Simple: help reduce network operating costs by simplifying thenetwork architecture and maximize the quality of the transmissionnetwork and traffic

Scalable: Ensure network expansion while saving costs

Superior: Ensure end network performance (for end users) alwaysachieve the best quality.

Secure: Aways be safe from external threats, the exchange ofinformation on which to have high security.

3G VIDEO TELEPHONE DEPLOYMENTSIn Vietnam


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The units granted 3G licenses:

Vinaphone

Viettel

Mobifone

EVN Telecom and Ha Noi Telecom



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Three basic services: Video call, Mobile Internet, D-com 3G

Seven value-added services: MobiTV, Imuzik 3, Mclip,

Vmail, Game...

With 8,000 3G stations completed the installation

Coveraged 63 provinces and cities in the country

This is the first unit which deployed 3G service(10/2009) Coverage nationwide with 6 milion people who used

3G(35,92% of nationwide)

Internet Services speed height: Mobile Internet, Mobile

Broadband

Three basic services: Video call, Mobile Camera

Entertaiment services: Mobile TV, 3G Portal


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With 3,500 3G stations completed the installation

capacity to serve up to four times.

Download speed up to 21 Mbps and upload is

5.76 Mbps

Three basic services: Video call, Mobile Camera

Entertaiment services: Mobile TV, 3G Portal

EVN Telecom will provide consumers with a number ofother value-added services such as video phone, locate

and find information, Internet access, large-capacity data

transmission, listen to music and watch video qualityhigh.


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3G VIDEO TELEPHONE DEPLOYMENTSIn Foreign Networks

In Asia, the first national 3G network is widely used in Japan. In

2001, NTT Docomo is the first company to release a commercial

version of the W-CDMA network.

In 2003, 3G services started in Europe.

In Africa, the first 3G network was introduced in Morocco in late

March 2007 by Wana Company.


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3G technology is referred to as an IMT-2000 World

Telecommunications Organization's (ITU), the most in the

world. However, in fact the largest telecommunications

equipment manufacturer in the world has built into 4commercial 3G standards:

W-CDMA

CDMA 2000

TD-CDMA TD-SCDMA



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video telephone in 3g

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