overview of h.350 directory services for multimedia conferencing larry amiot northwestern university...
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Overview of H.350 Directory ServicesFor Multimedia Conferencing
Larry AmiotNorthwestern [email protected]
Internet2 Commons Site Coordinator TrainingMarch 23, 2004Indianapolis, Indiana
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The Need
The large scale deployment of IP-based video and voice services has driven the need for complementary directory services
• Users need directories to locate other users with whom they wish to communicate
• Associate authentication information with a user and enable both endpoint and gatekeeper access to that information
• Store endpoint configuration information
Examples of these services are H.323, voice/IP (SIP), VRVS, and MPEG.
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Directory Services
Generic super class, called commObject, defined that holds information that describes an endpoint such as a video conferencing system or an IP telephone
The commObject schema can be associated with a user, so that one can connect to a specific user’s IP telephone or video endpoint
The commObject class can be further sub-classed to represent specific protocols
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H.350 Directory Services
Directory Service is being developed as an international initiative
commObject is a schema definition that has been ratified by the International Telecommunication Union (ITU)
It is based on the Lightweight Directory Access (LDAP) protocol
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ITU Documents
The following documents are the ITU documents:
• H.350- commObject• H.350.1- h323Identity• H.350.2- h235Identity• H.350.3- h320Identity• H.350.4- SIPIdentity• H.350.5- GenericIdentity
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H.350.1
H.323 Directory Services• The first version of commObject defined h323Identity, which described attributes specific to an h.323 endpoint
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H.350
commURIObject• commURI
commObject • commUniqueId • commOwner • commPrivate
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H.350.1
h323Identity Object Class•h323IdentityGKDomain•h323Identityh323-ID •h323IdentitydialedDigits•h323Identityemail-ID•h323IdentityURL-ID•h323IdentitytransportID •h323IdentitypartyNumber•h323IdentitymobileUIM •h323IdentityEndpointType•h323IdentityServiceLevel
9From ViDeNet Video Middleware Cookbook, Jill Gemmill et al 2003
Directory Services Model
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Enterprise LDAP Server commObject LDAP Server
commOwner
commURI
User Search
Basic Directory Services Model
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NU Enterprise LDAP server
NU commObject LDAP server
NU Web Server
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Northwestern Directory Services
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Northwestern Directory Services
NU Enterprise LDAP server
NU commObject LDAP server
ViDeNet International Search
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Directory-of-Directories
CommObject LDAP Directory
Enterprise LDAP Directory
Local User Search
CommObject LDAP Directory
Enterprise LDAP Directory
CommObject LDAP Directory
Enterprise LDAP Directory
CommObject LDAP Directory
Enterprise LDAP Directory
Remote User Search
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Northwestern Directory Services
Add/Change/Delete A Record
NU commObject LDAP server NU Web Server
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NU PH serverNU Enterprise LDAP server
NU commObject LDAP server
NU Web Server
Add/Change/Delete A Record
LDAP Operations
commURI Nightly Update
Northwestern Directory Services
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Potential Uses of H.350
Directory Services
Configuration Information
Authentication
Dial able URLs