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Workflow-enabled Internet Service Delivery for a Variety of Access Networks. APNOMS 2003 . ByungDeok Chung*, Hoon Choi** , SeongBeom Kim* Operations Support System Laboratory, KT* Department of Computer Engineering, CNU** Email:{bdchung,sbkimm}@kt.co.kr*, hchoi@ce.cnu.ac.kr

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slide1

Workflow-enabled Internet Service Delivery for a Variety of Access Networks

APNOMS 2003

ByungDeok Chung*, Hoon Choi** , SeongBeom Kim*

Operations Support System Laboratory, KT*

Department of Computer Engineering, CNU**

Email:{bdchung,sbkimm}@kt.co.kr*, hchoi@ce.cnu.ac.kr

Tel : 81-42-870-8620

slide2

Operator Centric

Customer Centric

Each Operation Centric

Business Centric

Operator Centric

Process Centric

Organization Centric

Manual Manipulation

Automatic Manipulation

Introduction

High speed Internet service users in Korea, exceeds about 10 million these days

 xDSL/FTTC enables Internet services at minimal cost

 Big issues with Network Service Provider(NSP)

 Develop Flexible, Cost effective, Operations Support system(OSS)s

 Cover Emerging (new compound and Cross-domain ) Internet services

 Automation of service provisioning and

equipment activation

 Internet service installation

cross domains with SLA

 Hard to support proper management

by conventional concepts.

 Propose the workflow-enabed

Internet Service Delivery

based on Provisioning Model(PM)

 Workflow-based OSS-SDM

(Service Delivery Management)

 Distributed , Mission-critical,

Enterprise-wide & Inter-enterprise

  • Service

Management

Changes

slide3

Plan

Model

Business Start

BSS

Development

Operation

Lab Test

Field Test

Analysis

Development

OSS

NE DB Building

  • Work Process
  • Access Network
  • OSS interface

Work

Process Define

T5: OSS Works

T3

T4

T1

T2

Time Lag of Newly Planned Internet Services

New Service Plan and launch processes

Average Time Duration for service automation for New service with equipment activation

Type A : New Service / Access Equipment

Type B : Current Service / new Access Equipment

Type C : new Service on existing Access Equipment (PSTN)

Type D : new Service on existing Access Equipment (Internet)

slide4

PSTN

Leased

Network

client/server

Applications

Inter-

Operability

Network

Devices

Customer

Cares

Operator’s point of view

Host

Systems

Telecom

Devices

xDSL

PSDN

Common Foundation ?

Consistent View ?

Paradigm Changes of Service Management

Properties of Conventional OSSs in Service delivery,

 Closely related with customers like BSS (Business Support System)

 Service configuration management system are designed and being

operated, based on operation processes and operator’s preferences

 Designed for organizational purposes

 Many different OSSs having similar functions and roles are created.

 New paradigm moving toward Customer/Operater centric in the design

Complicated Internet service configuration over heterogeneous domains

 Internet Service Network Status in Korea

 Customer Side : Densely populated with apartments and buildings

 Many types of Equipments and Loops for Internet services

slide5

One SOE

SOE-1

SOE-2

SOE-3

One interface

Cross-domain SDM

Interfaces per service

Handling manual work orders,

Interworking with EMS, etc…

in different ways

Provisioning

Internet

Service Delivery

SDM-a

SDM-b

SDM-x

Network Elements

Network Elements

Network Elements

Network Elements

Design

& Assign

Activation

Task generation

/ distribution

Task generation

/ distribution

Task generation

/ distribution

Task generation

/ distribution

Automated Tasks

Manual Tasks

NE/NMS/EMS/SMS

Internet Service Delivery over Access Networks

  • Propose OSS-SDM manages configuration works

for various services and network equipments

  • Cross-domain Service Delivery
  • Automation of Service Delivery

BSSs

Handling manual work orders,

Interworking with EMS, etc…

in one unique way

Note: SOE(Service Order Entry)

Access Networks

slide6

1. Sales/Order Administration

2. Check Provisioned

Customer Service

Resource FlowOrganization FlowControl/Data Flow

Network Model(NM)

Provisioning Model(PM)

Remove Data Dependency

Business Processes

Service

Add Site

Network

Provider

Index ManagementRecord ManagementI/O Processing

1. Remove Flow andDependency

2. Define processes

one by one

Application Programs

3. Service/Work Order

5.Access Network

Provisioning

4. Service Network

Provisioning

DBMS

Work order

Billing template

Work order

Service Ids

Customer tags

Apply

commericaiized

Platforms easily

Network programs

WFMS or WFAP

Headquarters

OSS DB

Network

Provider

BSS DB

Home Office

Application Programs

6. Service Monitoring

and Repair

7. Billing and

Customer Care

Branch Office

DBMS

Remote/Mobile

Network programs

  • Fault
  • Performance

Workflow-based Service Delivery

Workflow management

Attractive technology for integration and interrelation of OSSs

 Workflow engine responsible for:

1) Business process creation, deletion, and management

of process execution from instantiation through completion

2) Control of Activity scheduling within an operational (business) process

3) Interaction with management components and/or human resources

4) Monitor and control management processes in execution

Telecommunication service business flow and Process Definitions

slide7

Business Process

(i.e.. what is intended to happen)

is managed by a

is defined in a

Workflow

Management System

Process Definition

composed of

via

Process Analysis

Modeling/definition Tool

Sub-Processes

Process Instances

used to create

& manage

include one or more

Service

Delivery

Process

Modeling

Handle Order from/to

Customer Care Systems

Activities

Activity Instances

Break Complex

Orders into Simple Orders

which may be

Which include

Manage Workflow

to Activate Network

Manage Workflow

to handle

Manual works

Invoked Applications

Manual

Activities

Automated

Activities

Work Items

Provision

Network Elements

Manage Order Printouts

and Results

Activate Network

Elements

Report Completion

Process Definition for Service Delivery

Based on WFMC Model

 Service delivery process based on workflow

Key Modelling Points

 Process Structure  Activities & Navigation

 Roles & Participants

 Trigger Conditions  Application invocation

slide8

MDF

Dial-up/ISDN

POTS

AP-Hub

ADSL

Main

Node

DSLAM

RAS

DSU/CSU

GSR

NAS

GES

PSTN

Switch

Router

FLC

KIX

xDSL

Inside

Plants

Outside

Plants

Ntopia

Metro

-Ethernet

End Equipment

Transmission

Customer

Premise

Access Network

Service Network

Network

Servers

(DNS,Mail)

IDC/CP

Access Network

Data/Internet

Transmission Network

Switches

Network

Elements

Manhole

Pole

Cable

DCS

Router

ISP

Switch

Conduit

Premise

Port

Node

RAS

NAS

Wireless

Multiplexing

LLU

DSLAM

MDF

Link

Link

Link

Logical

Elements

Route

Prefix

Trunk

Loop

Routing

LLU

Models of Networks and Provisioning

 Network Model(NM)

 Model capable of supporting OSS solution at all TMN layers

 PM (including its base (NM)) domain specific models

A service : implemented over a set of services, supported by lower layer networks

slide9

LL Service Model

Mobile Service Model

BML/SML

Service

Model

Internet Access Over Cable

Internet Access Over PSTN

Internet Access Over LL

Internet Aceess Over AP

…….

……

VPN Service Model

VPN Service Model

Internet Access Service Model

VPN Service Model

PSTN Service Model

Provisioning Model (PM)

Provisoining

Model

Network Model (NM)

Network

Model

MPLS

Fber

Cable

MDF

ATM

DSL

NML/EML

Provisioning Model over a Variety of Networks

  • Conceptualization of Provisioning Model over Network Model
  • Advantages of PM based Activation

1) Supports new business rules and new services definitions

  •  No need to re-develop service provisioning and activation system
  • 2) Supports complex services and lifecycle management
  •  Each service request is an atomic operation, which can be fully implemented,
  • rolled back if fatal errors occurred during service implementation,
  • cancelled before the service is fully implemented
  •  Supports network topology and protocol change
slide10

Process

Definition Tools

Administration

& Monitoring

Tools

Workflow

Engine(s)

Workflow

Engine(s)

Workflow Client

Applications

Invoked

Applications

Workflow Interfaces for Service Delivery

A Workflow Reference Model

Other Workflow

Workflow API and Interchange formats

Enactment Service(s)

Workflow Enactment Service

o Interface 1 : Process Definition

o Interface 2 : Workflow Client

o Interface 3 : Invoked Applications

o Interface 4 : Interoperability

o Interface 5 : Audit Data Specification

Process transition controls by definition tables (Interface 1)

Determine business categories

Workflow

Rules

Service Start

Choose action

else if …

Check-if not null

If true

Do the action

Check

next action

slide11

Determine the involved domains

for each service order

Business Requirements

xDSL

Workflow Management

(Cross-domain coordination)

VPN

Metro

-Ethernet

Leased Line

Ntopia

RDMS Tables and GUI

validate, analyze, and decompose to workflow SO

Create

Modify

Delete

Process Definition Tools

Workflow

Rules

domain-n

domain-1

domain-2

(1)

Workflow Model (Process/PM/NM) DB

Process

Cron table-based application Distributed Resources management

Process/Activity InstanceControl

Definition*

End-to-end service provisioning , Activation and work Control

Process instance Control

Audit/history Query

Process instance (visual) monitoring

Engine Driver and Cron tab control UI

Service

Delivery

Workflow

RDMS Tables

EAI, Other OSS Interface

Workflow API and Interchange formats

Facility

Workflow

built-in

Order Tracking

Pre-Ordering

Control Data

Provisioning

Pre-ordering

Workflow

Other Workflow

Other Workflow

Engine(s)

Workflow Enactment Service

Workflow Enactment Service

Engine(s)

Enactment Service(s)

Enactment Service(s)

Administration

Monitoring

Tools

Relevant Data

(5)

Workflow

Workflow

(2)

Operator

Participant Info.

App-Participant

Workflow

Workflow

Engine(s)

Engine(s)

Engine(s)

Engine(s)

Audit/history Management

Workflow (Process/PM/NM) Model/Activity Control

Customer-Resource

(4)

Work Orders

Process instance Generator

Equipments DB

(3)

(3)

(4)

C/S and Web

work record fetch

Operator and Engine

involved together

Application

Application

distribute order

/ activation

Invoked

Applications

Process

Control

Work List

Work List

Process

Data

Data

Handling

Handling

Control

results

Distributed Process Sequence Controls

Workflow Client Applications

Workflow Client Applications

Workforce/NMS/Service Nodes

Workforce/NMS/Service Nodes

Workforce/NMS/Service Nodes

Cross-domain Service Delivery Management

 Service provisioning and Activation function

provides complete life cycle management of services

across multiple technology domains.

 In Core of integrated SDM,

 Workflow engine controls and manages progress status.

 Workflow rules are made prior to a new service’s introduction.

 In workflow rules, there is a matrix type description representing

business flows according to service type, service order type and specific conditions.

 Workflow Refence Model vs. SDM Workflow

  • Cross-domain coordination

and management

slide12

Conclusion andFuture Work

 Experience from designing workflow enabled OSSs,

 Workflow (coupled with distributed systems) technology offers a very

powerful and flexible basis for implementing automated management tasks.

 Workflow can assist business process automation and flow-through.

 Workflow offers significant benefits to automated and managed component integration

 Workflow engine can handle the gradual ‘re-engineering’ of legacy system

access and its integration with new (or replacement) components.

 Scalable and Flexible to rapidly changing environment of various aspect

 Workflow-enabled OSS-SDM

Increase automation to reduce cost and improve service

Good for the large organizations like NSPs