Automatic Switched Transport
Network (ASTN)
Automatic Switched
Transport Network (ASTN) allows traffic paths to be set up through a
switched network automatically. The term ASTN replaces the term ASON
(Automatically Switched Optical Network) and is often used
interchangeably with GMPLS (Generalized MPLS). This is not
completely correct as GMPLS is a family of protocols, but ASON/ASTN
is an optical/transport network architecture. The requirements of
the ASON/ASTN architecture can be satisfied using GMPLS protocols
developed by the IETF or by GMPLS protocols that have been modified
by the ITU. Furthermore, the GMPLS protocols are applicable to
optical and non-optical (e.g., packet and frame) networks, and can
be used in transport or client networks. Thus, GMPLS is a wider
concept than ASTN.
Traditionally, creating traffic paths through a series of Network
Elements has involved configuration of individual cross-connects on
each Network Element. ASTN allows the user to specify the start
point, end point and bandwidth required, and the ASTN agent on the
Network Elements will allocate the path through the network,
provisioning the traffic path, setting up cross-connects, and
allocating bandwidth from the paths for the user requested service.
The actual path that the traffic will take through the network is
not specified by the user.
Changes to the network (adding/removing nodes) will be taken into
account by the ASTN agents in the network, but do not need to be
considered by the user. This gives the user far more flexibility
when allocating user bandwidth to provide services demanded by the
customer.
GMPLS consist of several protocols, including routing protocols (OSPF-TE
or ISIS-TE), link management protocols (LMP), and a
reservation/label distribution protocol (RSVP-TE). The
reservation/label distribution protocol CR-LDP has now been
deprecated by the IETF in RFC 3468 (February 2003) and IETF GMPLS
working group decided to focus purely on RSVP-TE.
The GMPLS architecture is defined in RFC 3945.
Wavelength Switched Optical Network with two established lightpaths.
About TACS
TACS
Consulting Delivers The Insight and Vision on Information
Communication and Energy Technologies for Strategic Decisions.
TACS is Pioneer and Innovator of many Communication Signal
Processors, Optical Modems, Optimum or Robust Multi-User or
Single-User MIMO Packet Radio Modems, 1G Modems, 2G Modems, 3G
Modems, 4G Modems, 5G Modems, 6G Modems, Satellite Modems, PSTN
Modems, Cable Modems, PLC Modems, IoT Modems and more..
TACS consultants conducted fundamental scientific research in
the field of communications and are the pioneer and first
inventors of PLC MODEMS, Optimum or Robust Multi-User or
Single-User MIMO fixed or mobile packet radio structures in the
world.
TACS is a leading top consultancy in the field of Information,
Communication and Energy Technologies (ICET). The heart of our
Consulting spectrum comprises strategic, organizational, and
technology-intensive tasks that arise from the use of new
information and telecommunications technologies. TACS Consulting
offers Strategic Planning, Information, Communications and
Energy Technology Standards and Architecture Assessment, Systems
Engineering, Planning, and Resource Optimization.
|
TACS is a leading top consultancy in the field of information, communication
and energy technologies (ICET).
The heart of our consulting spectrum comprises strategic,
organizational, and technology-intensive tasks that arise from the use of new
information, communication and energy technologies.
The major emphasis in our work is found in innovative consulting and
implementation solutions which result from the use of modern information,
communication and energy technologies.
TACS
- Delivers the insight and vision
on technology for strategic decisions
- Drives
innovations forward as part of our service offerings to customers
worldwide
- Conceives
integral solutions on the basis of our integrated business and technological
competence in the ICET sector
- Assesses technologies and standards and develops
architectures for fixed or mobile, wired or wireless communications systems
and networks
- Provides
the energy and experience of world-wide leading innovators and experts in their fields for local,
national or large-scale international projects.
|
