(continuation of Q.2/2)
With the rapid growth of IP-based networks, it is increasingly important to
ensure that integration of voice, data, video, and multimedia services on such
networks can route and interwork with networks based on other technologies,
particularly TDM-based PSTN networks, ISDN, frame relay, ATM, and mobile network
technologies. Routing methods are currently being extended to converged network
services integrated on a shared network. Existing routing methods are not
adequate to address all the QoS and performance issues that arise with the
extended applications. These issues and others are critical to be addressed by
Q.2/2 in its ongoing work.
During the previous Study Period progress was made on these issues by Q.2/2
(lead Study Group/Question on routing) in the form of 9 Recommendations. These
Recommendations include the E.360 series of 7 Recommendations on “QoS Routing
and Related Traffic Engineering Methods for IP-, ATM-, and TDM-Based Networks,”
and E.361 on “QoS Routing Support for Interworking of QoS Service Classes Across
Routing Technologies.” With the continuing growth in new public services,
networks, and capabilities, the list of projects is not expected to diminish. In
a competitive global telecommunications environment, the importance and
controversial nature of routing issues often cause their study to be contentious
and lengthy. This is expected to continue into the next Study Period.
The Question will deal with the issues detailed under Tasks below.
||Topics and rationale
||Target completion date
Maintenance of existing E-series Recommendations
Rationale: It is
essential to provide required evolution in existing recommendations.
Routing for new network applications and technologies
Network technologies are being widely extended to include voice, data,
video, multimedia, and other services integrated within the NGN. This
project will extend the work on the E-Series of Recommendations to identify
and recommend routing needs within next generation networks.
Dynamic routing for mobile networks
Rationale: This project will
consider networks where topologies are in motion rather than fixed. It is
expected that the change in perspective will lead to new routing
architectures, protocols, and methods. This project will provide new
recommendations on routing extensions arising from these mobile
Routing congestion control
Rationale: State-dependent routing
methods that flood link-state and topology information throughout the
network are subject to overload and congestive collapse. This project will
provide routing congestion control methods and Recommendations to address
Rationale: New and/or modified projects will be
introduced as needed, as has always been the experience.
Within Study Group 2
All questions dealing with the definition and characteristics of
telecommunication services for which routing technologies will be utilised, and
to also include questions focusing on a) numbering and addressing plans (e.g.,
Q.1/2); b) network management and performance (e.g., Q.5/2).
- ITU-T SG3
- ITU-T SG7
- ITU-T SG11
- ITU-T SG13
- ITU-T SG15
- ITU-T SG16
With other groups
- ATM Forum
- MPLS/Frame Relay Alliance
- relevant international forums/organizations.