April 26, 2001 Presented by Greg Ratta ( GR001017-1 ), ITU-T SG 11 Vice Chairman Outline • • • • • 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 • • • • 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 • • • • • 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 • • • • • • • • • • • • • • • • • • • • • • 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