I nternational Telecom m unication Union ITU-T Distributed Signalling and Distributed Signalling and Multiple Transport Layers Multiple Transport Layers S tephen S hew S tandards and Control Plane Architecture, Nortel Director, OIF board I TU-T W orkshop “NGN and its Transport Netw orks“ Kobe, 2 0 -2 1 April 2 0 0 6
Outline ITU-T Distributed signalling for transport o S ignalling standards and relationships o Recent signalling work o • IETF – LS P S titching • OIF – interop of Ethernet/ Transport • ITU-T - AS ON multi-layer multi-S CN I TU-T W orkshop “NGN and its Transport Netw orks“ Kobe, 2 0 -2 1 April 2 0 0 6 2
W hat is Signalling? ITU-T S ignalling is a function that creates calls and connections. o Path Computation function in Routing NCC NCC Component CC CC CC Call Request Connection Request Call Accept Call Accept Connection Indication I TU-T W orkshop “NGN and its Transport Netw orks“ Kobe, 2 0 -2 1 April 2 0 0 6 3
Signalling in Transport Netw orks ITU-T S ignalling has existed for many years in telephony, ISDN, o ATM, and MPLS . S ignalling is extended for transport networks due to o • Fixed granularities – defined multiplexing hierarchy • Protection functions in the data plane • S eparation of data plane from control and management planes • Addressing/ Naming - S eparation of spaces between data plane and control plane “ Connection” centric rather than “ Protocol” centric o • Connection exists even if control plane ceases I TU-T W orkshop “NGN and its Transport Netw orks“ Kobe, 2 0 -2 1 April 2 0 0 6 4
Protocols and Architectures ITU-T o S ignalling capabilities are implemented in protocols, whose pieces can be combined according to different architectures. o Different S DOs contribute pieces and architectures. Architectures IA IA Rec. RFC RFC RFC RFC RFC RFC IA IA IA Rec. IA RFC RFC IETF OIF ITU-T I TU-T W orkshop “NGN and its Transport Netw orks“ Kobe, 2 0 -2 1 April 2 0 0 6 5
Signalling Standards ITU-T Dynamic sig nalling and ro uting c o ntro l o ve r OT N/ SONE T / SDH ne two rk. o Dynamic sig nalling fo r E the rne t se rvic e s using ASON I nte rlaye r o arc hite c ture GMPL S Ar c hite c tur e ASON Ar c hite c tur e RF C 3945 G.8080 – c ontr ol plane G.805 – be ar e r plane Pr ovide r C Pr ovide r A Pr ovide r B ASON/ GMPL S GMPL S OIF E -NNI OIF UNI i/ w UNI Clie nt Clie nt RF C 4139 OIF Signalling RF C 4208 base d on G.7713, G.7713.2, G.7713.3 RF C 3472 RF C 3473 E the r ne t se r vic e s OIF E NNI r outing base d RF C 3946 base d on on G.7715, G.7715.1 RF C 4203 G.8010 , G.8011, ME F .10 I TU-T W orkshop “NGN and its Transport Netw orks“ Kobe, 2 0 -2 1 April 2 0 0 6 6
I ETF CCAMP – LSP Stitching ITU-T A Label Swit ched Path (LS P) represents a data connection, o and signalling state to support it. LS P S titching allows an LS P to be treated as a single o data/ signalling link. End to end LSP End to end LSP End to end LSP End to end LSP S- S -LSP LSP S- S -LSP LSP S S - - LSP LSP S S - - LSP LSP Area 1 Area 1 Area 1 Area 1 Area 2 Area 2 Area 2 Area 2 I TU-T W orkshop “NGN and its Transport Netw orks“ Kobe, 2 0 -2 1 April 2 0 0 6 7
OI F I nterop Dem o Overview ITU-T o The OIF Worldwide Interoperability Demo combined: • Ethernet S ervices • Control plane • Flexible Transport Bandwidth functions To provide dynamic Et hernet services over a bandwidth efficient transport network Ethernet Services – Point-to-Point Control plane – a set of Private Line functions that act on a bearer (data) plane for Data over the purpose of transport - GFP, automated VCAT, LCAS call/connection setup and release. I TU-T W orkshop “NGN and its Transport Netw orks“ Kobe, 2 0 -2 1 April 2 0 0 6 8
I nterlayer Call Technology ITU-T Client makes an Ethernet call to destinat ion o Network triggers SONET/ S DH calls to mat ch Ethernet service request o Control plane sets up Ethernet and S ONET/ S DH connections, and o controls GFP/ VCAT E the r ne t c a ll E the r ne t c a ll SONE T / SDH c a ll E the r ne t c a ll c omple te s progre sse s Clie nt OXC OXC Clie nt UNI-C UNI- N UNI- N UNI-C Ethernet Ethernet GF P GF P VCAT VCAT E the r ne t c onne c tion Inte rlaye r UNI- N UNI- N c all SONET/SDH invoke d c onne c tions I TU-T W orkshop “NGN and its Transport Netw orks“ Kobe, 2 0 -2 1 April 2 0 0 6 9
ITU-T I TU-T W orkshop “NGN and its Transport Netw orks“ Kobe, 2 0 -2 1 April 2 0 0 6 1 0
I TU-T I nterlayer Architecture ITU-T G.8080 has defined an interlayer archit ecture called a “ mapped o server” . Examples of its use are: • Ethernet Private Line over S DH • VCAT layer • Multiple Ethernet Private Line over one server connection Architecture C3 C2 C1 NCC NCC NCC NCC NCC NCC NCC NCC S1 S2 Ethernet Connection Example Eth 1 Eth 2 Eth 3 Ethernet Layer SDH Layer SDH 5 SDH 4 I TU-T W orkshop “NGN and its Transport Netw orks“ Kobe, 2 0 -2 1 April 2 0 0 6 1 1
Multilayer m ulti-SCN Exam ple ITU-T How do Client NCCs communicate when there are multiple o S ignalling Communication Networks present? One solution is to build a route of client NCCs while setting up o the server layer. SCN 2 SCN 1 SCN 3 ? Eth 3 Eth 1 NCC-4 NCC NCC NCC-1 NCC-2 NCC-3 NCC NCC NCC NCC VC-4 VC-4 ENNI <NCC-2, NCC-3, NCC4> <NCC-2, NCC-3, NCC4> I TU-T W orkshop “NGN and its Transport Netw orks“ Kobe, 2 0 -2 1 April 2 0 0 6 1 2
1 3 Thank You I TU-T W orkshop “NGN and its Transport Netw orks“ Kobe, 2 0 -2 1 April 2 0 0 6 ITU-T
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