ATM standard - Faculty of Computer Science and Information ...

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30 Οκτ 2013 (πριν από 4 χρόνια και 10 μέρες)

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ATM STANDARDS


GROUP 17



DIAN NURFITRI M.NASIR AHMAD

WET020028


NURALIZA CHE HASSAN



WET020127


NURHUZAIMA MAHZAN



WET020130


NURZALINA MOHD ZAWAWI


WET020139


MUZAMIEL HADY A.MUNIR


WET030160

Introduction



Standard
-

a set of rules or procedures that are


either widely used or officially




specified.



3 main standard bodies :


International Telecommunications Union
-
Telecommunications (formerly the CCITT)


American National Standards Institute


European Telecommunications Standards
Institute



4 industry forums currently participating :


The ATM Forum


The Frame Relay Forum


The Internet Engineering Task Force (IETF)


The Switched Multimegabit Data Service Interest
Group (SIG)


International Telecommunication
Union

(ITU)


An international organization established to
standardize and regulate international radio and
telecommunication.


Responsible for studying technical, operating, and
tariff questions and issuing recommendations on
them, with the goal of standardizing
telecommunications worldwide.


Combines the standards
-
setting activities of the
predecessor organizations formerly called the
International Telegraph and Telephone Consultative
Committee (CCITT) and the International Radio
Consultative Committee (CCIR).


Examples of ITU
-
T B
-
ISDN Standards:



1.113 Vocabulary for B
-
ISDN


1.121 Broadband Aspects of ISDN


1.150 B
-
ISDN Asynchronous Transfer Mode



Functional Characteristics


1.211 General Service Aspects of B
-
ISDN


1.311 B
-
ISDN General Network Aspects


1.321 B
-
ISDN Protocol Reference Model and Its


Application

American National Standards
Institute (ANSI)


The premier formal B
-
ISDN/ATM standards
organization in the United States.


Adopts and adds detail to the ITU
-
T standards and
deals with issues concerning the unique North
American transmission requirements
.


Structured into several committees, which cover a
broad spectrum of areas:


TlEl
-
covering the physical interface aspects of ATM


TIMI
-
covering the maintenance aspects of ATM


TlAl
-
covering performance aspects


T1S1.5
-
covering the network, service, signaling, ATM
layer, interfaces, and AAL aspects of ATM.


Examples of ANSI Standards:



T1.624
-
1993, BISDN UNI: Rates and Formats
Specification


T1.627
-
1993, BISDN ATM Functionality and
Specification


T1.629
-
1993, BISDN ATM Adaptation Layer 3/4
Common Part Functionality and Specification


T1.633, Frame Relay Bearer Service Interworking

European Telecommunications
Standards Institute (ETSI)


The ETSI deals with issues concerning the European
communications
.


Generate, on the basis of global standards, more
detailed specifications adapted to the unique
historical, technical, and regulatory situation of each
region.





ATM

Forum




The ATM Forum was formed in October, 1991 by four
companies: Northern Telecom, Sprint, SUN Microsystems,
and Digital Equipment Corporation (DEC).



In January 1992, the membership was opened to the
industry.


There are 3 categories of membership:


Principal

-

Participate in technical and marketing



committee meetings.

Auditing

-

Receive copies of the technical and marketing


committee documents.

User

-

Participate in End User Roundtable (ENR)




meetings.



There are three types of committees in the ATM Forum:


Technical


Produces implementation specifications and is


organized into a number of technical "subject


matter expert" sub committees.


Market Awareness and Education (MA&E)

Produces tutorials, presentations, press releases,
newsletters, and other informative material.


End User Roundtable (ENR) user group


Goal
-

to collect higher level requirements and provide these
to the technical and MA&E committees
.



Frame Relay forum


Many

aspects

of

frame

relay

are

similar

to

those

of

ATM
.



They

are

both

connection
-
oriented

protocols,

involve

ISDN
-
based

signaling,

and

require

similar

network

management

functions
.



The

ATM

Forum

and

the

Frame

Relay

Forum

corroborated

closely

in

the

production

of

Frame

Relay/ATM

internetworking

specifications
.



Today, the Frame Relay Forum and the ATM Forum
are placing a considerable amount of emphasis on the
interoperability of frame relay and ATM services.


There are implementation agreements for
communicating frame relay traffic across an ATM network,
and for communicating between frame relay end systems
and ATM end systems.


This is not limited to basic data transfer but is
expanding to include all types of data and ultimately video
traffic.


The Frame Relay Forum is currently completing a
packetised voice implementation agreement which will go on
to be an ATM Forum standard later this year.


Frame relay will be used well into the next century
because it provides a needed service now and provides a
`natural' data service on future ATM networks.

Internet Engineering Task
Force(IETF)


Non
-
profit organization


An open community of network designer, operator..


Defining the standard of Internet such TCP/IP


Organized by topic into several ares (routing,
transport, security…)


Supervise by Internet Architechture Board (IAB)


Support by Internet Society (ISOC) including
logistical, financial and insurance


Standard are expressed in form of Request for
Comment (RFC)



SMDS Interest Group (SIG)


BackGround


switched multimegabit data services


high
-
speed, packet
-
switched, datagram
-
based WAN
networking technology


speed up to 1.544Mbps over Digital Signal Level 1
(DS
-
1)


speed up to 44.736Mbps over Digital Signal Level 3
(DS
-
3)



Network Component


CPE (customer premise equipment), carrier equipment
and SNI (subscriber network interface)


CPE

owned and maintain by customer


end devices such as terminal, personal computer,
routers and modem


carrier equipment

consist of high speed WAN swiches


has it own specification of network equipment

Bellcore


SNI

is the interface between CPE and carrier
equipment


border between CPE and carrier equipment


Diagram above show how SNI Provides an Interface
Between the CPE and the Carrier Equipment in SMDS



SMDS Interface Protocol



a.k.a SIP


use by CPE and carrier equipment to communicate


provide connection through SNI to allow CPE to
access SMDS network


based on the IEEE 802.6 Distributed Queue Dual Bus
(DQDB)


DQDB was chosen as the basis because it is an open
standard that supports all the SMDS service.


plus, it was designed for compatibility with current
carrier transmission standards


CREATING STANDARDS
-

THE
PROCESS



SUMMARY

ITU
-
T

include topics such as the definition of the
B
-
ISDN protocol model, the function and
sequence of each bit in the ATM cell.

ANSI

adopts and adds detail to the ITU
-
T
standards and deals with issues concerning
the unique North American transmission
requirements.

ETSI

deals with issues concerning the European
communications.

ATM FORUM


working on standards for ATM LAN
emulation.

IETF

defining the standard of Internet such
as TCP/IP. Organized by topic into
several

areas (routing, transport, security etc)

RELAY FRAME

connection
-
oriented protocols, involve

ISDN
-
based signaling, and require similar

network management functions.


The SMDS
Interest Group
(SIG)

working closely with the ATM Forum to

specify access to SMDS service over an

ATM UNI interface.


Players


Vendors


Users


Network Service Providers



Process


Work plan


Meetings and contributions


Drafting and review


Voting and approval


Acceptance and interoperability


CREATING STANDARDS

THE END

THANK YOU