Pluggable Protocols RFP an Experience from the CAMOUFLAGE Project

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Pluggable Protocols RFP - an Experience from the
CAMOUFLAGE Project

• Joachim Fischer, Nils Fischbeck,
• Eckhardt Holz, Olaf Kath, Veit Vogel
• Humboldt University Berlin
• kath_at_informatik.hu-berlin.de

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Outline

• The CAMOUFLAGE Project - Overview
• Why alternative transport messaging services?
• Looking for a common approach The Pluggable
  Protocols Draft RFP
• Concept for a technical solution OCI
• Proof of concept
• Connecting CORBA nodes through GFP
• Connecting CORBA nodes through N-ISDN
• Conclusions

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CAMOUFLAGE
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CAMOUFLAGE Tasks

• Build a service execution platform on top of
  existing telecom infrastructure
• DPE based on CORBA
• CORBA nodes connected via B-ISDN / N-ISDN
  signalling or PMBS
• Provision of engineering mechanisms for
  computational stream bindings
• OMG Management of A/V Streams
• TINA Network Resource Architecture
• First applications TANGRAM services

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Outline

• The CAMOUFLAGE Project - Overview
• Why alternative transport messaging services?
• Looking for a common approach The Pluggable
  Protocols Draft RFP
• Concept for a technical solution OCI
• Proof of concept
• Connecting CORBA nodes through GFP
• Connecting CORBA nodes through N-ISDN
• Conclusions

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Current Situation
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Vision
heterogeneous (telecom) network
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transport
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GFP IOP
GIOP
message service
ROSE IOP
TCAP IOP
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Outline

• The CAMOUFLAGE Project - Overview
• Why alternative transport messaging services?
• Looking for a common approach The Pluggable
  Protocols Draft RFP
• Concept for a technical solution OCI
• Proof of concept
• Connecting CORBA nodes through GFP
• Connecting CORBA nodes through N-ISDN
• Conclusions

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What do we need?
message servicemanagement
messages
transport servicemanagement
byte stream
network
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Pluggable Protocols Draft RFP

• negotiate transport service between transport
  provider, ORB and application
• specify interfaces, which allow to add and remove
  transport services
• specify interfaces, which allow usage of
  transport service
• identify restrictions on networking protocols
• identify, how IIOP can be accessed as one
  transport service
• possibly optional part message service

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Relationships to other RFPs
Pluggable Protocols RFP
- transport protocol selection - messaging
protocols
- common approach - protocol integration
Realtime RFP
GIOP over X RFPs
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Pluggable Protocols and RT RFP

• no explicit requirement for (telecom) transport
  protocol plug in (optional part)
• proposals may specify a RT interaction
  protocol... (as message service) optional
• no requirement to show, how IIOP can be accessed
  through a Pluggable Protocol Interface
• restriction to RT may prevent solutions for
  technical areas without RT constraints

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Pluggable Protocols and GIOP over X RFPs

• all those RFPs adress transport service
  specifications (in the sense of this proposal)
• this proposal gives a common approach for GIOP
  over X mappings

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Outline

• The CAMOUFLAGE Project - Overview
• Why alternative transport messaging services?
• Looking for a common approach The Pluggable
  Protocols Draft RFP
• Concept for a technical solution OCI
• Proof of concept
• Connecting CORBA nodes through GFP
• Connecting CORBA nodes through N-ISDN
• Conclusions

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An Open Communication Interface

• Need of Pluggable Protocols identified by
  CAMOUFLAGE
• Idea and concepts of OCI in cooperation with OOC
  Inc.
• Realization by OOC Inc.
• Proof of concept GIOP over GFP, GIOP over
  N-ISDN, future Messaging over GFP
• Details in the presentation of OOC Inc.

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Outline

• The CAMOUFLAGE Project - Overview
• Why alternative transport messaging services?
• Looking for a common approach The Pluggable
  Protocols Draft RFP
• Concept for a technical solution OCI
• Proof of concept
• Connecting CORBA nodes through GFP
• Connecting CORBA nodes through N-ISDN
• Conclusions

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Generic Functional Protocol

• a means to exchange ROSE APDUs at the UNI
• two adressing mechanisms
• specified for B-ISDN UNI CS 2
• TCAP is candidate for mapping into equivalent
  functions at the NNI
• three transport modes CLBI, COBI, BR
• international standard ITU-T Q.2932.1

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GFP APDU
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Using GFP Transport Modes

• default mode connection less bearer independent
  (CLBI)
• server objects can specify connection oriented
  bearer independent (COBI) due to security/billing
• bearer related (BR) transport in case of large
  invocation/termination parameters or due to
  server object specification

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CAMOUFLAGE ORB connectivity
public B-ISDN network
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N-ISDN based kTN for CORBA

• Phase 1 Use an ISDN bearer directly for GIOP
  message exchange
• Phase 2 Use B-channel PMBS for GIOP message
  transfer
• Phase 3 Use D channel facilities (i.e. PMBS)
  for GIOP message transfer
• Prototype scheduled for Feb 1998

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Outline

• The CAMOUFLAGE Project - Overview
• Why alternative transport messaging services?
• Looking for a common approach The Pluggable
  Protocols Draft RFP
• Concept for a technical solution OCI
• Proof of concept
• Connecting CORBA nodes through GFP
• Connecting CORBA nodes through N-ISDN
• Conclusions

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Conclusions

• Integration of existing telecom infrastructure
  and Distributed Objects Technology-gt Pluggable
  Protocols RFP
• not only transport services should be adressed
• OCI could be one possible solution
• Proof of OCI (i.e. message service selection) is
  ongoing work
• probably demonstrated at one of the next OMG
  meetings

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References and Informations

• TINA-C Document DPE Architecture Version 2.0
  beta (restricted access)
• http//camouflage.informatik.hu-berlin.de/camoufla
  ge
• http//www.eurescom.de
• http//tinac.com4070/97/resources/dpe/wg/index.ht
  ml
• Proceedings of TINA 97
• Proceedings of GLOBECOM 97

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Thank you for your attention