Response to Request For Information Telecom Domain Task Force, OMG telecom980806

1
Response to Request For Information - Telecom
Domain Task Force, OMGtelecom/98-08-06

• Joint submission by
• Kent Ridge Digital Labs, Singapore
• and
• Ericsson Radio Systems, Sweden
• 15 September, 1998

2
Organization

• Plan for the presentation
• Motivation - Problem setting and Introduction
• Requirements of Object Services
• Real-Time Messaging Service
• Event and Notification Service
• Location Service
• Signalling and Network Control Applications
• Standardization of programming interfaces
• Future work

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A Typical Wireless ATM Network
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Problems with CORBA for signalling in wireless
GIOP / WATM ESIOP
Location Server
CORBA
TCP/IP
ORB
Wired ATM Network supporting CORBA
over either IIOP, B-ISDN ESIOP, ATM ESIOP etc.
Access Point

• client / server capability at MT
• transport capability at MT
• level of CORBA support at MT
• dynamic downloading of signalling protocols

5
Design Issues

• Design parameters
• channel parameters
• packet loss and delay
• memory footprint
• Proxy to act on behalf of MT to minimize
  communication and computation overheads
  
• Parameterized selection of transport protocols
  via a range of ESIOPs eg. CAMOUFLAGE project

6
Object services and domain specific generic
interfaces
Location service
Personal mobility
ORB
Event and Notification Service
Naming and Trading Service
Statistics Update and Monitoring Service
Real-time message delivery service
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Requirements of Object Services

• Real Time Message Delivery Service
• A Messaging service ensuring real time guarantee
  of message delivery
  
• Event and Notification service
• Real time delay guarantees for event
  notifications
  
• Queuing of events and automatic forwarding to new
  locations

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Requirements of Object Services

• Naming Service
• A location independent object reference
• Hierarchical naming structure
• Real time update of location information
• Trading Service
• Location information is significant in the
  decisions of the trader
  
• Integrated with the Location Service

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Requirements of Object Services

• Location Service (specific to wireless domain)
• Position of a mobile terminal in the network
• Event notification for location update should be
  real time guaranteed.
  
• Coordination with naming and trading services
• Location update necessary when the proxy migrates
  to a new location
  
• In case of mobile objects, the reference consists
  of location information and naming/trading
  service information

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Signalling and Network Control Applications

• Parameters Negotiated at ESIOP Connection
  Establishment (i.e. at Attachment and Handover)
  
  
• Segment Size
• ARQ Timers, ARQ Type
• Hart Beat Timers
• Max bit rate

Mobile Station
CORBA Core
Negotiation
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Signalling and Network Control Applications

• A Proxy Object Functions as a Gateway for
  Control Signalling

CORBA Core
Attachment Fabric
Mobile Station
Create
Control Object
Proxy Object
Authenticate Server
Location Server
ORB
Mini-ORB
GIOP
GIOP
Name Server
ESIOP
ESIOP
IP
IP
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Signalling and Network Control Applications

• A Protocol Adapter Dynamically Binds the Client
  to a Proxy Object

CORBA Core
Mobile Station
Proxy Object
Server
Proxy Object
Client
Standardized API
ORB
Mini-ORB
Protocol Adapter
GIOP
GIOP
Name Server
ESIOP
ESIOP
IP
IP
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Standardization of Programming Interfaces

The L interface and higher interfaces make use of
CORBA / DPEs

U Interface
U Interface
Distributed Processing Environment (CORBA ORB)
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Summary and Future Developments

• We propose
• Support of Signalling and Network Control
  Applications
  
• Support of Network Transport Applications via
  parameterized selection of ESIOP
  
• Standardized interfaces for programming networks
  - IEEE P1520
  
• Better understanding of performance issues of
  CORBA
  
• Pared down clients capable of interacting with
  CORBA servers via a range of ESIOPs
  
• Following developments in other relevant SIGs,
  PTCs and DTFs for object services
  
• Future developments
• Active Networks
• Other distributed platforms - Java/ DCOM client /
  server