Network Working Group M. Suzuki
Request for Comments: 3033 NTT
Category: Standards Track January 2001
The Assignment of the Information Field and Protocol Identifier
in the Q.2941 Generic Identifier and Q.2957 User-to-user Signaling
for the Internet Protocol
Status of this Memo
This document specifies an Internet standards track protocol for the
Internet community, and requests discussion and suggestions for
improvements. Please refer to the current edition of the "Internet
Official Protocol Standards" (STD 1) for the standardization state
and status of this protocol. Distribution of this memo is unlimited.
Copyright Notice
Copyright (C) The Internet Society (2001). All Rights Reserved.
Abstract
The purpose of this document is to specify the assignment of the
information field and protocol identifier in the Q.2941 Generic
Identifier and Q.2957 User-to-user Signaling for the Internet
protocol.
The assignment, that is specified in section 4 of this document, is
designed for advanced B-ISDN signaling support of the Internet
protocol, especially the B-ISDN signaling support for the connection
that corresponds to the session in the Internet protocol which is
clarified in section 2. This specification provides an indispensable
framework for the implementation of long-lived session and QoS-
sensitive session transfers over ATM.
1. Purpose of Document
The purpose of this document is to specify the assignment of the
information field and protocol identifier in the Q.2941 Generic
Identifier and Q.2957 User-to-user Signaling for the Internet
protocol.
The assignment, that is specified in section 4 of this document, is
designed for advanced B-ISDN signaling support of the Internet
protocol, especially the B-ISDN signaling support for the connection
that corresponds to the session in the Internet protocol which is
Suzuki Standards Track [Page 1]
RFC 3033 GIT and UUS Assignment for IP January 2001
clarified in section 2. Needless to say, the purpose of this
specification is not limited to this support, and it should also be
applicable to other purposes.
This specification provides an indispensable framework for the
implementation of long-lived session and QoS-sensitive session
transfers over ATM. Note that this document only specifies the
assignment of the information field and protocol identifier, and that
it may not specify complete protocol that enables interoperable
implementation. This is because it is beyond the scope of this
document and will be specified in a separate document.
2. Session-related ATM Connection
With the development of new multimedia applications on the current
Internet, the demands for multimedia support are increasing in the IP
network, which currently supports best effort communications. In
particular, demands to support QoS guaranteed communications are
increasing with the development of voice, audio, and video
communications applications. And it may also be necessary to
introduce the mechanism that can efficiently transfer the huge volume
of traffic expected with these applications.
The major features of B-ISDN are high speed, logical multiplexing
with the VP/VC, and flexible QoS management per VC, so it is quite
natural to use these distinctive functions of B-ISDN to implement a
multimedia support mechanism in the IP network. The flexible QoS
management and logical multiplexing functions in B-ISDN are the
expected method of implementing the QoS guaranteed communications in
the Internet. And when a long-lived session is supported by a
particular VC, efficient packet forwarding may be possible using the
high speed and logical multiplexing of B-ISDN.
This section clarifies B-ISDN signaling functions that are required
when the session is supported by the VC, for advanced B-ISDN
signaling support of the Internet protocol.
Suzuki Standards Track [Page 2]
RFC 3033 GIT and UUS Assignment for IP January 2001
2.1 Long-lived Session Signaling
An example scenario for establishing a VC for a long-lived session is
shown in Fig. 2.1.
IP Router ATM SW ATM SW IP Router
+----+ Default VC +----+
| WS | +------+ UNI +-----+ +-----+ UNI +------+ | WS |
+--+-+ | /->|<------+-\-/-+--------+-\-/-+------>|<-\ | +-+--+
datatracker.ietf.org