Identification and Specification of NGN Service and Control Requirements. Tobey Trygar

Transcription

1 Internatinal Telecmmunicatin Unin Identificatin and Specificatin f NGN Service and Cntrl Requirements Tbey Trygar Telcrdia Technlgies Wrkshp NGN and its Transprt Netwrks Kbe, April 2006

2 Overview f Services and Netwrks Physical Views f Netwrks Service Infrmatin Flws OSI and G.805 Layers Interesting Time Scales Issues and Questins Wrkshp NGN and its Transprt Netwrks Kbe, April

3 Service verses Netwrk A Service Prvider fcuses n Service Resurces A Service Custmer fcuses n Service Supprt Operability Accessibility Retainability Integrity Security Service Cmpnent Of Is The Basis Fr Netwrk Cmpnent Of Planning, Prvisining, and Administratin Trafficability (Grade f Service) Netwrk Item Dependability Transmissin Wrkshp NGN and its Transprt Netwrks Kbe, April

4 Views f Quality f Service QS is the degree f cnfrmance f the service delivered t a user by a prvider in accrdance with an agreement, e.g., an SLA Quality f Service (QS) Type Of Traffic Engineering QS Specificatins QS Perceived QS Delivered QS Desired By Custmers QS Offered By Service Prvider Wrkshp NGN and its Transprt Netwrks Kbe, April

5 Physical Netwrk Tplgy Cre Netwrk ISP VIP Inter-Office Facilities HUB CO CO HUB CO Metr Netwrk HUB CO Cllectr Ring CO HUB CO VIP ISP CO = Central Office DLC = Digital Lp Carrier DSLAM = DSL Access Multiplexer ISP = Internet Service Prvider ONU = Optical Netwrk Unit Access ONT = Optical Netwrk POS = Passive Optical Splitter PON = Passive Optical Netwrk VIP = Vide Infrmatin Prvider Business Access Ring LAN IP, GbE CO POS DLC ONT ONT DLC ADM PON DSLAM O N U xdsl xdsl Wrkshp NGN and its Transprt Netwrks Kbe, April

6 Dmains f Applicability Access Metr Cre Layer 3 Edge/Aggregatin Ruters Cre Ruters Layer 2 GbE/ATM/MPLS Access Switches MPLS/ATM/FR Cre Switches Physical Residential Access Enterprise Access MSPP/RPR Metr/Reginal OADM Metr WDM Grming OXC Cre OXC Cre OADM Lng Haul DWDM ULH DWDM Aggregatin/Distributin Netwrks Reginal Netwrks MSPP = Multi-service Prvisining Platfrm OADM = Optical Add-drp Multiplexer OXC = Optical Crss-cnnect RPR = Resilient Packet Ring ULH = Ultra-lng Haul Wrkshp NGN and its Transprt Netwrks Kbe, April

7 Typical IP (and beynd) Encapsulatins IEEE LLC IP IEEE LLC PPP AAL5 RPR MAC Ethernet MAC HDLC ATM RPR PHY 10GbE LAN PHY 10GbE WAN PHY GbE PHY GFP SONET / SDH G.709 OCh digital wrapper/ ptical channel Optical fibre / G.652, G.653 etc. Wrkshp NGN and its Transprt Netwrks Kbe, April

8 Service Related Infrmatin Flws OAM Delivery Netwrk Signalling-Cntrl Delivery Netwrk Service Delivery Netwrk Service Nde 1 Service Nde k Custmer Nde 1 Custmer Nde i Wrkshp NGN and its Transprt Netwrks Kbe, April

9 Multi-Administrative Dmain Services End-t-End Service... Administrative Dmain 2... Administrative Dmain 1... Administrative Dmain 4... Administrative Dmain 3... Wrkshp NGN and its Transprt Netwrks Kbe, April

10 Cnnectin Set-Up in Layer 1 Signaling fr given path layer is understd Cnnectin Matrix. Cnnectin Matrix. Cnnectin Matrix Path Layer Abstract Signaling Interface Server Layer t Path Layer Wrkshp NGN and its Transprt Netwrks Kbe, April

11 Physical View Of A Linear OTN OTN Client Signal OTN Client Signal ODU ODU ODU OCh/OTU OCh/OTU OCh/OTU OCh/OTU OCh/OTU OMS OMS OMS OMS OMS OMS OMS Physical Layer Physical Layer Physical Layer Physical Layer Physical Layer Physical Layer ONE ONE ONE ONE ONE ONE ONE = Optical Netwrk Element Wrkshp NGN and its Transprt Netwrks Kbe, April

12 IP/OTN Bth technlgies supprt unique perfrmance mechanisms with IP predminately uni-directinal and OTN bi-directinal. Depending n the OTN survivability mechanisms, the IP layer may assume OTN perfrmance t be predictable. Survivability speeds within the OTN may interact with IP ruting cnvergence. IP ruters as ASON clients, may change OTN perfrmance characteristics, e.g., errr rates, bandwidth, and link creatin. End-t-end IP client perfrmance will require cnsideratin f bth the IP layer and the OTN layers. Wrkshp NGN and its Transprt Netwrks Kbe, April

13 Signaling within and between Layers Layer 3 Ruting / Frwarding Abstract Signaling Interface Layer 2 Cntains Cnnectin Oriented and Cnnectinless Prtcls Abstract Signaling Interface Layer 1 Path Layer Signaling Client - Server Signaling Wrkshp NGN and its Transprt Netwrks Kbe, April

14 Time Scales fr Typical Events Autmatic Prtectin Switching Autmatic Service Restratin Netwrk Resurce Optimizatin Service Custmer Additin- Remval Capacity Additin Fllwing Majr Disruptin Tens f Millisecnds Tens f Hurs Wrkshp NGN and its Transprt Netwrks Kbe, April

15 Issues and Questins Traditinal perfrmance allcatin is hrizntal, i.e. hypthetical reference netwrks. Is a vertical allcatin needed? Is there a calculus fr aggregating perfrmance metrics acrss layers If a capability can be supprted at multiple layers, hw shuld these capabilities be crdinated? Sme layer characteristics change with time due t technlgy advances. Is there a need fr a family f layer characterizatin templates? Are there a set f principles fr allcating perfrmance functins t layers based n characteristics? Clients can use numerus server layers. Is there a generic interlayer signalling mdel needed? Wrkshp NGN and its Transprt Netwrks Kbe, April

16 Back-Up Slides Wrkshp NGN and its Transprt Netwrks Kbe, April

17 The Optical Transprt Netwrk The Optical Transprt Netwrk (OTN) Is specified primarily in G.872, G.709, G.798, G.959.1, and G.874, Is currently limited t the transprt f digital signals Prvides transprt, multiplexing, ruting, supervisin and survivability f client signals It is cmpsed f the fllwing digital layers: Optical Channel Data Unit (ODU), Path and Tandem Cnnectin Optical Channel Transprt Unit (OTU) It is cmpsed f the fllwing phtnic layers: Optical Channel (OCh) Layer, OCh Reduced (OChr) Optical Multiplex Sectin (OMS) Layer Optical Transmissin Sectin () Layer Optical Physical Sectin (OPS) Layer Wrkshp NGN and its Transprt Netwrks Kbe, April

18 OTN Survivability Mechanisms The tw fundamental survivability mechanisms supprted in the OTN are prtectin and restratin schemes. Prtectin schemes are: Autnmus and make use f pre-established backup resurces Optical Multiplex Sectin (OMS) resilience - all channels in a fiber (r fiber bundle) prtected as a whle, Optical Channel (OCh) resilience - each ptical channel is prtected individually. Restratin schemes are: Reactive and make use f dynamically identified backup, Management system r signalling system based, Require netwrk state infrmatin. Wrkshp NGN and its Transprt Netwrks Kbe, April

19 References E.106, Descriptin f an Internatinal Emergency Preference Scheme (IEPS) E.490.1, Overview Of Recmmendatins On Traffic Engineering E.800, Terms And Definitins Related T Quality Of Service And Netwrk Including Dependability E.801, Framewrk Fr Service Quality Agreement E.860, Framewrk Fr A Service Level Agreement G.709, Netwrk Nde Interface Fr The Optical Transprt Netwrk (OTN) G.798, Characteristics f Optical Transprt Netwrk Hierarchy Equipment Functinal Blcks G.805, Generic Functinal Architecture Of Transprt Netwrks G.806, Characteristics f Transprt Equipment - Descriptin Methdlgy and Generic Functinality Wrkshp NGN and its Transprt Netwrks Kbe, April

20 References G.872, Architecture Of Optical Transprt Netwrks G.874, Management Aspects Of Optical Transprt Netwrk Elements G.959.1, Optical Transprt Netwrk Physical Layer Interfaces G.7041, Generic Framing Prcedure G.7710, Cmmn Equipment Management Functin Requirements G.7712, Architecture And Specificatin Of Data Cmmunicatin Netwrk G.7713, Distributed Call and Cnnectin Management G , Distributed Call and Cnnectin Management (DCM) Based n PNNI Wrkshp NGN and its Transprt Netwrks Kbe, April

21 G , DCM Signalling Mechanism Using GMPLS RSVP-TE G , Distributed Call and Cnnectin Management Signalling Using GMPLS CR-LDP G.8080, Architecture fr the Autmatic Switched Optical Netwrk (ASON) GB 917, SLA Management Handbk Series Versin 2, TeleManagement Frum M.20, Maintenance Philsphy fr Telecmmunicatins Netwrks M.3010, Principles Fr A Telecmmunicatins Management Netwrk X.700, Management Framewrk fr Open Systems Intercnnectin (OSI) fr CCITT Applicatins Y.1271, Framewrk(s) n Netwrk Requirements and Capabilities t Supprt Emergency Cmmunicatins Over Evlving Circuit Switched and Packet Switched Netwrks Wrkshp NGN and its Transprt Netwrks Kbe, April