Download Bearer Independent Call Control

April 26, 2001
Presented by Greg Ratta (
GR001017-1
), ITU-T SG 11 Vice Chairman
Outline
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Introduction - elements of QoS signalling
Signaling of QoS in B-ISDN
Overview of BICC
QoS signalling for BICC
Summary
GR001017-2
ATM Service Categories
Attribute
CLR
CTD and CDV
PCR & CDVT
SCR and BT
MCR
Feedback
ATM Layer Services Categories
CBR
rt-VBR nrt-VBR ABR
UBR















*CDVT is a network characteristic and is not signaled
 = network specific
GR001017-3
Guaranteed Frame Rate (GFR)
• Objective: a non-real-time service that provides
some QoS commitment while placing minimal
constraints on the user
• Major Application: Carry aggregate TCP/IP traffic
between two routers
• User is free to send any rate up to a PCR all the
time, but network commitment is only to an MCR
• GFR service is “frame-based.”
GR001017-4
Inclusion of QoS parameters in the SETUP
message when the I.356 QoS class is explicitly
requested (QoS value different from 0)
QoS parameter
QoS class (value)
1
2
Transit delay (NOTE 1)
O
O
2-point CDV
O
O
CLR (CLP=0) (NOTE 2)
CLR (CLP=0+1) (NOTE 2)
3
O
O
4
5
O
O
NOTE 1 - Maximum end-to-end transit delay objectives may only be specified for the forward
direction.
NOTE 2 - The CLR parameter is shown as two entries to indicate explicitly whether the
CLR commitment is for the CLP=0 or for the CLP=0+1 cells.
GR001017-5
Inclusion of QoS parameters in the SETUP message
when the QoS class value is not explicitly requested
and the requested ATC is an I.371 ATC
Broadband bearer capability
BTC (value)
7
11
19
12
16
17
20
21
QoS class (value)
0
0
0
0
0
0
0
0
Transit delay (NOTE 1)
O
NOTE 3
O
NOTE 3
O
NOTE 3
NOTE 3
NOTE 3
2-point CDV
O
O
O
QoS parameter
O
CLR (CLP=0) (NOTE 2)
CLR (CLP=0+1) (NOTE 2)
O
O
O
O
O
O
O
NOTE 3 - Maximum end-to-end transit delay objectives may be specified (though not
recommended) for reasons of backward compatibility with Recommendations Q.2931
(1995),Q.2934 (1998), Q.2961.1 (1996), Q.2961.2 (1997) Q.2961.3 (1997), Q.2961.4
(1997) and Q.2961.6 (1998).
GR001017-6
Inclusion of QoS parameters in the SETUP
message supported for backward compatibility
Broadband bearer capability
Bearer class
BTC (value) (NOTE 4)
A
X or
FR
VP
C
X or
FR
VP
C
absent
4, 5
or 6
5
9
1 or 9
9
absent
X or
FR
VP
absent, absent
0, 2, 8 or 10
or 10
QoS parameter
QoS class (value)
0
0
0
Transit delay (NOTE 1)
O
O
NOTE 3
2-point CDV
O
O
CLR (CLP=0) (NOTE 2)
O
O
O
CLR (CLP=0+1) (NOTE 2)
NOTE 4 – BTC values 0, 1, 2, 4, 6, 8 are not used on transmission but shall be
understood on reception.
GR001017-7
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.
GR001017-8
BICC network architecture
ISN
ISUP
ISN
CSF
BCF
BICC
CMN
Bearer
Sign.
BICC
Bearer
Sign.
CSF
BCF
TDM trunks
TDM trunks
BF
PSTN/ISDN network
GR001017-9
ISUP
Data Network
BICC network
BF
PSTN/ISDN network
BICC Capability Set 1
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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
GR001017-10
BICC Capability Set 2 and Beyond
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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)
GR001017-11
QoS Signalling in BICC CS 3
 Based on the TIPHON specifications for end-to-end QoS
control
– 4 TIPHON QoS service classes (Best, High, Medium and Best
Effort) in ETSI TS 101 329 part 2
– the signalling and control of end-to-end QoS in TIPHON systems
in ETSI TS 101 329 part 3.
 Initiated joint activity with ITU-T SG 16 for:
– Translation of the TIPHON defined QoS requirements and
signalling flows in protocol requirements.
– Definition of generic procedures in call/bearer control protocols
(BICC, H.225/H.245, SIP/SDP) for end-to-end QoS service
control.
– The specification of a generic H.248 (Megaco) package for end-toend QoS service control.
GR001017-12
Summary
• All new services in ITU-T SG 11 to be
specified for BICC before being added to
ISUP or BISUP
• QoS signalling available for ATM-based
infrastructure
• Capability for call level QoS signalling
under study
GR001017-13
BICC Acronyms
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AAL
ACF
ACN
AESA
AGI
ANI
APM
ATM
BCF
BF
BICC
BIWF
BNC
CSF
CSM
CMN
B-ISUP
DSS2
GAT
GFT
GIT
GSN
ATM Adaptation Layer
Access Control Function
Access Concentration Node
ATM End System Address
Application Generated Identifier
Access Network Interface
Application transport Message
Asynchronous Transfer Mode
Bearer Control Function
Bearer Function
Bearer Independent Call Control
Bearer Interworking Function
Backbone Network Connection
Call Service Function
Call State Model
Call Mediation Node
Broadband ISUP
Digital Signalling System no.2
Generic Addressing and Transport protocol
Generic Function Transport control
Generic Identifier Transport
Gateway Serving Node
GR001017-14
•IN
•IP
•ISDN
•ISN
•ISUP
•MTP3b
•NNI
•POP
•PSTN
•SN
•SPOI
•SS7
•SSCOP
•STP
•SWN
•TDM
•TE
•TG
•TSN
•UNI
•VCC
•VoIP
Intelligent Networks
Internet Protocol
Integrated Services Digital Network
Interface Serving Node
ISDN User Part
Message Transfer Part no.3b
Network-Network Interface
Point of Presence
Public Switched Telephony Network
Serving Node
Signalling Point of Interconnection
Signalling System no.7
Service-Specific Connection-Oriented Protocol
Signalling Transfer Point
Switching Node
Time Division Multiplexing
Terminal Equipment
Trunk Group
Transit Serving Node
User Network Interface
Virtual Channel Connection
Voice-over-IP