Ota058001 Ason Introduction Issue 1.02

8/12/2019 Ota058001 Ason Introduction Issue 1.02

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OTA058001 ASON

Introduction

ISSUE 1.02

Upon completion of this course, you will be able

Outline the standards of ASON

Illustrate the structure of ASON

Describe the networking characters of

Explain the service characters of ASON

Chapter 1 Background of ASON

Chapter 2 System Structure of ASON

Chapter 3 Networking Characters of ASON

Chapter 4 Service Characters of ASON

Challenges Facing Traditional ON

Too many layers for Optical Network Networking expansibility

End to end service configuration and protection

Real-time management function is poor

iManager T2100

iManager T2000 iManager T2000

Traditional ON

Demand of Service

Broadband data service and leased line service are increasing

rapidly and the capacity of network is getting larger.

Data service has the paroxysmal attribute.

Demand Catalyzes a New Form of ON

Expansibility of network

Rapid service supply

Real-time network management

Bursting data service

Reduction of operation cost

Flexible service grooming

1.1 Demand

1.2 Technology Development

Technology Development of ASON

At 1996，IETF brought the suggestion of MPLS forward

MPLS protocol can provide the package flow control function

called Traffic Engineering to the data network.

MPLS: Multi-Protocol Label Switch

Technology Development of ASON

Generalized Multi-Protocol Label Switching：

The GMPLS was brought forward by IETF at 2000.

Compared with MPLS, GMPLS has been improved further:

− Generalization of label mapping

− Bidirectional transportation

− Enhanced signaling ability

− Integrated routing ability

2.1 ASON System Structure

2.2 ASON Protocol Structure

ASON Logical Structure

Control Plane

Transport Plane

OCC OCC

Switch

Switch Switch

Switch

ManagementPlane

OCC: Optical Connect Control OSPF: Open Shortest Path First

Switch: Switching Equipment CSPF: Constrained Shortest Path First

CCI: Connect Control Interface NMI : Network Management Interface

SC: Switched connection is a service connection requested by aterminal user (router, for example) and then created in the ASONcontrol plane through signaling.

PC: Permanent connection is a service connection calculatedbeforehand and then created through the NM by issuing a command toNE.

SPC: Soft permanent connection, the connection between the user and

the transmission network is configured directly by the NM. Theconnection within the transmission network is requested by the NM andthen created by the NE’s control plane through signaling.

ASON Service Type

ASON Network Application

Centralized ASON

Distributed ASON

ASON Software

ASON Logical Structure

Cross-ConnectUnit

LineInterface

Management Link

Transport LinkManagement Link

Transport Link

Communication andcontrol unit of NE

Control Link

Signaling ProtocolRSVP-TE

Routing ProtocolOSPF-TE

Link Management Protocol LMP

Network Based on ASON

Operator 1 Operator 2 Operator 3

External DataLinkInternal DataLink

Inside Domain

I-NNI signaling：RSVP-TE

I-NNI routing： OSPF-TE

Domain2

Between Domains

E-NNI signaling：RSVP-TE

E-NNI routing： DDRP

Between carries：

E-NNI protocol：RSVP-TE

E-NNI route： BGP

UNI signaling：RSVP-TE

HuaWei’s

strategy

Domain1

2.1 ASON System Structure

2.2 ASON Protocol Structure

ASON Protocols

GMPLS (Routing, Signaling, Link Management)

OSPF (routing):

Flood and gather topology for calculating service path

RSVP-TE (signaling):

Establish and then maintain the service path

LMP (link management):

Discover the neighbors and links

Questions

Which three planes does ASON have?

What is the main protocol ASON uses?

Resource Automatic Discovery

Each NE can search the neighbor NE automatically

Each NE can build the topology by itself

1000km

End to End Service Configuration

Selectwhich

circuit？

The first node N1 calculate the best circuit by CSPF with theconstraint condition

Get the topology of transport network by LMP and OSPF-TE

Setup LSP by RSVP-TE with the calculated circuit, meanwhiledownload cross-connect configuration data.

Setupcircuit byRSVP- TE

From A to Bsetup VC4 Bi-

directionalcircuit with re-

routingrestoration

SLA: Service Level Agreement

Diamond Level

Gold Level

Silver Level

Copper Level

Iron Level

Protection and Restoration

Protection: Protection switch. Redundancy resource is reserved to

protect the working traffic in very short time when working channels is

failed;

Restoration: Real time reroute. Routing protocol will recalculate the

service path, then signaling protocol re-build the new LSP to restoreservice.

Diamond Level Service

Permanent 1+1 protection: the service can always be protected within 50 ms

T2000 NMS

ASON NE Client

Working Path

Protection Path

Gold Level Service

The first failure inside one VR results in automatic protection within 50 ms

The next failures inside the same VR result in rerouting within several hundred milliseconds

Gold Service can use unprotected links when there is no available M:N resources.

VR 2VR 1

than50ms

T2000 NMS

ASON NE

Client

Silver Level Service

Provide real time rerouting protection

T2000 NMS

ASON NE

Client

Copper Level Service

Provides no service protection

T2000 NMS

ASON NE

Client

Iron Level Service

VR 2VR 1

than50ms

T2000 NMS

ASON Client

Gold Level

Iron Level

Service Tunnel

Carry VC12 service over VC4 Tunnel

Reroute VC4 Tunnel and hence VC12 is restored

VC4 Tunnel VC12 Service

Merge VC12

T2000 NMS

ASON NE

Client

Path Correlation

T2000 NMS

ASON NE

Client

Correlation

Migrate from PC to SPC

Smooth upgrade of the traditional network to ASON

PC SPC Signaling

PC: Permanent Connection SPC: Soft Permanent Connection

T2000 NMS

ASON NE

MSTP NE

Coexistence

One NMS manage both ASON and Traditional networks

MSP Ring,1:1 can pass through ASON nodes and Traditional nodes at the same time

ASON NE

SDH NE

MSPMSP

T2000 NMS

Application Model : Overlap

ASON equipments have different transport and control plane with traditional

equipments, which has only transport plane. They two connect with each other

through UNI.

IP/ATM/TDM

transport plane

ASON transport

and control plane

O-UNI O-UNI

Application Model : Peer

Equipments have uniform GMPLS control plane

IP/ATM/TDM

Control planeGCC

GCCGCC

CCICCI CCI

CCICCI CCI CCI CCI

Spreading

Long-haul/Backbone layer first，making a domain to perform end2end service

configuration, Mesh networking and restoration

Aggregation layer implements ASON and operate with long-haul/backbone layer to

expand the range of end2end service providing

Client layer joins in to provide dynamic bandwidth service

Client

Aggregation

Long-haul/Backbone

Glossary

ASON/ASTN :Automatic Switching Optical (Transmission) Network

OCS :Optical Core Switching

OSPF :Open Shortest Path First

IS-IS :Intermediate System- Intermediate System

CSPF :Constrained Shortest Path First

LMP :Link Management Protocol

RSVP-TE :Resource Reserved Protocol----Traffic Engineering

CR-LDP :Constrained Route---Label Distribution Protocol

UNI/NNI :User-Network Interface/Network-Network Interface

BGP :Border Gateway Protocol

DDRP :Domain-Domain Route Protocol

Background of ASON

System Structure of ASON

Networking Character of ASON

Service Character of ASON

Summary

www.huawei.com

Thank You

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