A New Internet-Draft is available from the on-line Internet-Drafts directories.
Title : Interdomain Trust-Relationships for SIP-based Roaming
Author(s) : H. Behrens
Filename : draft-behrens-sipping-roaming-architecture-00.txt
Pages : 11
Date : 2004-2-11
This draft describes an authentication mechanism which can
be used to enable users of VoIP to globally roam between any
number of ITSPs (Internet Telephony Service Providers)
without needing to have a prior customer or billing
relationship with all of them. This enables profiles and one-
line-billing.
Providers using this authentication mechanism do neither
need full-mesh
trust relationships or roaming agreements with every other
possible provider nor do they need to rely on a centralized
brokerage entity to process calls.
The Home Network (HN), which handles all AAA for a user
attempting to use an ITSP's service is determined through a
unique identifier submitted by the user. This Network Access
Identifier [RFC2486] contains information about the trust
domain or trust realm the user belongs to. Based on a simple
discovery mechanism a provider can establish a trust path to
this home network. Once this is
established, the provider can authenticate the user and
check his credit with the home network. Accounting and rate
information will be sent to the home network for mediation
and processing.
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