GR010426-1

Presented by Greg Ratta ( ), ITU-T SG 11 Vice-Chairman

ITU-T IP/MediaCom 2004 WorkshopApril 26, 2001

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Outline

• Introduction - What is BICC?

• BICC Architecture

• Overview of BICC Capability Set 1

• BICC Capability Set 2 and H.248

• Summary

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What is BICC?• BICC provides a means of supporting narrowband ISDN

services across a broadband backbone network without impacting the interfaces to the existing N-ISDN network and end-to-end services.

• The BICC call control signaling protocol is based on N-ISUP signaling

• The bearer control signaling protocols are based on different bearer technology control signaling protocols (e.g., DSS2 for AAL type 1 and AAL type 2)

• The BICC call control signaling protocol should not be aware of the actual bearer transport being employed. The binding information is used to reference the bearer.

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BICC network architecture

Data Network

ISN

BCF

CSF

BF

CMN

ISN

BCF

CSF

BF

BICC BICC ISUPISUP

TDM trunks TDM trunks

BICC network PSTN/ISDN networkPSTN/ISDN network

BearerSign.

BearerSign.

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BICC Capability Set 1

• Forward and Backward Backbone Network Establishment• Transport Call Control via MTP SS7 or ATM • Support of most existing narrow band services.• New Backbone Network Connection (BNC) with or

without Codec Negotiation• Reuse of Idle Backbone Network Connection (BNC)• Separate Release of Call and Backbone Network

Connection (BNC)• Bearer Transport Types supported: AAL 1 & AAL 2

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Forward bearer set-up and backward bearer set-up

“bearer + call SETUP request”

“bearer + call SETUP request”

“bearer + call SETUP request”

ISN Data Network ISN

“bearer SETUP”

“bearer SETUP”

“call SETUP request”

“call SETUP confirmation”

For

war

d be

arer

set

-up

Bar

ckw

ard

bear

er s

et-u

p

ISUP signalling

BICC signalling

Bearer signalling

“bearer SETUP”

“bearer CONNECT”

“bearer SETUP”

“bearer CONNECT”

“bearer CONNECT

“bearer CONNECT”

“call SETUP request”

“bearer + call SETUP request”

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“Early bearer +call SETUP request”to improve call set-up time

“bearer + call SETUP request”

“bearer + call SETUP request”

ISN Data Network ISN

“bearer SETUP”

“bearer SETUP”

“call SETUP request”

“call SETUP confirmation”

“bearer CONNECT

“bearer CONNECT”

“early bearer + call SETUP request”

For

war

d be

arer

set

-up

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Additional “confirmation of bearer CONNECT” to prevent speech clipping

ISN Data Network ISN

“bearer SETUP”

“bearer SETUP”

“call SETUP request”

“call SETUP confirmation “

For

war

d be

arer

set

-up

“bearer CONNECT

“bearer CONNECT”

“confirmation of bearer CONNECT”

“bearer + call SETUP request”

“bearer + call SETUP request”

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Structure of the BICC standardization documentation

ISUP

Q.765APM mechanism

Q.764ISUP protocol

+ other

TRQ.2140BICC architecture

Q.765.5APP for BICC

B-ISUP

Q.2726.4AGI mechanism

Q.2764B-ISUP protocol

+ other

DSS2

Q.2941.3GIT mechanism

Q.2931DSS2 protocol

+ other

AAL2

Q.2630.1AAL2 protocol

+ other TRQ.3000DSS2 bearer

Bearer Networks

TRQ.3010AAL2 bearer

TRQ.3020B-ISUP bearer

BICC

Q.1901BICC protocol

Q.1901Annex CMTP3 & MTP3b

BICC signalling transport

Q.1901Annex DSSCOP

+ other

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BICC Capability Set 2 and Beyond• Extend BICC to the Local Exchanges

• Support IP Bearer, including Tunnelling

• Support of a Call Mediation Node Function

• Support Structured AAL1

• New Identifiers– Traffic Group

– Global Call Reference

• Extend BICC to Special Resources Nodes (e.g., announcement platforms…etc)

• See list of features attached to this presentation

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Functional architecture of the decomposed gateway

A

DC

X

X

X

B2

B1High LayerResourceControl

SCNSignalling

Termination

H.225.0Signalling

Termination

H.245Signalling

Termination

RASSignalling

Termination

ZSCN

SignallingTransport

Termination

Low LayerResourceControl

Packet andCircuitMedia

Termination

Y Z

“ISN”

With BICC CS 1

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Functional architecture of the decomposed gateway

A

DC

X

X

X

B2

B1High LayerResourceControl

SCNSignalling

Termination

H.225.0Signalling

Termination

H.245Signalling

Termination

RASSignalling

Termination

ZSCN

SignallingTransport

Termination

Low LayerResourceControl

Packet andCircuitMedia

Termination

Y Z

H.248

“Decomposed ISN”

BICC “CBC”

With BICC CS 2

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Network Topologies and Reference Points

AccessNetwork

Other Service Supplier Network

BICC Service Supplier Network

uni

nni

aniTE

TE

TE

TE

TE

TE

Call Control Signalling

Call Control Signalling

Call Control Signalling

Call Control Signalling

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BICC CS 2 and Beyond• Q.1902.1, BICC CS2 Functional Description• Q.1902.2, BICC CS2 General functions of messages and signals• Q.1902.3, Common Formats and Codes for BICC and ISUP• Q.1902.4, BICC protocol elements• Q.1902.5, Exceptions to APM in the context of BICC• Q.19xx.1, Interworking between BICC and ISUP• Q.19xx.2, Interworking between ISUP compatible signalling systems and the BICC

protocol• Q.19xx.3, Interworking between the H.225.0 Multimedia Call Control protocol in

an H.323 network and the BICC protocol• Q.19xx.4, Interworking DSS 2 to BICC• Q.19xy, Interaction between the INAP protocol and the BICC protocol• Q.ibcp, BICC IP Bearer Control Protocol• Q.cbc, Call and Bearer Control Protocol• Annex E to Q.1901, Signalling Transport Convergence for SCTP• + Supplements that document the signalling requirements

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Summary

• BICC CS 1 Standards were completed in 9 months

• BICC CS 2 uses H.248 in CBC interface

• All new services in ITU-T SG 11 to be specified for BICC before being added to ISUP or BISUP

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BICC Acronyms• AAL ATM Adaptation Layer

• ACF Access Control Function

• ACN Access Concentration Node

• AESA ATM End System Address

• AGI Application Generated Identifier

• ANI Access Network Interface

• APM Application transport Message

• ATM Asynchronous Transfer Mode

• BCF Bearer Control Function

• BF Bearer Function

• BICC Bearer Independent Call Control

• BIWF Bearer Interworking Function

• BNC Backbone Network Connection

• CSF Call Service Function

• CSM Call State Model

• CMN Call Mediation Node

• B-ISUP Broadband ISUP

• DSS2 Digital Signalling System no.2

• GAT Generic Addressing and Transport protocol

• GFT Generic Function Transport control

• GIT Generic Identifier Transport

• GSN Gateway Serving Node

•IN Intelligent Networks

•IP Internet Protocol

•ISDN Integrated Services Digital Network

•ISN Interface Serving Node

•ISUP ISDN User Part

•MTP3b Message Transfer Part no.3b

•NNI Network-Network Interface

•POP Point of Presence

•PSTN Public Switched Telephony Network

•SN Serving Node

•SPOI Signalling Point of Interconnection

•SS7 Signalling System no.7

•SSCOP Service-Specific Connection-Oriented Protocol

•STP Signalling Transfer Point

•SWN Switching Node

•TDM Time Division Multiplexing

•TE Terminal Equipment

•TG Trunk Group

•TSN Transit Serving Node

•UNI User Network Interface

•VCC Virtual Channel Connection

•VoIP Voice-over-IP