IP over
DWDM (IPoDWDM) is a technology used in
telecommunications networks
Telecommunication, often used in its plural form or abbreviated as telecom, is the transmission of information over a distance using electronic means, typically through cables, radio waves, or other communication technologies. These means of ...
to integrate
IP routers and
network switch
A network switch (also called switching hub, bridging hub, Ethernet switch, and, by the IEEE, MAC bridge) is networking hardware that connects devices on a computer network by using packet switching to receive and forward data to the destinat ...
es in the OTN (
Optical Transport Network).
A true IPoDWDM solution is implemented only when the IP Routers and Switches support ITU-T G.709.
["Interfaces for Optical Transport Network (OTN)”, ITU-T G.709/Y.1331] In this way IP devices can monitor the optical path and implement the transport functionality as FEC (
Forward Error Correction
In computing, telecommunication, information theory, and coding theory, forward error correction (FEC) or channel coding is a technique used for controlling errors in data transmission over unreliable or noisy communication channels.
The centra ...
) specified by
ITU-T
The International Telecommunication Union Telecommunication Standardization Sector (ITU-T) is one of the three Sectors (branches) of the International Telecommunication Union (ITU). It is responsible for coordinating Standardization, standards fo ...
G.709/Y.1331[ or Super FEC functionality defined in ITU-T G.975.1.
]
Benefits
This approach saves network components including shelves, processors, interfaces cards and hence it permits to reduce the power consumption, OPEX (Operational expenditure
An operating expense (opex) is an ongoing cost for running a product, business, or system. Its counterpart, a ''capital expenditure'' (capex), is the cost of developing or providing non-consumable parts for the product or system. For example, th ...
) and CAPEX (capital expenditure
Capital expenditure or capital expense (abbreviated capex, CAPEX, or CapEx) is the money an organization or corporate entity spends to buy, maintain, or improve its fixed assets, such as buildings, vehicles, equipment, or land. It is considered ...
).
This approach brings also a simplification of the network, eliminating the SDH/SONET
Synchronous Optical Networking (SONET) and Synchronous Digital Hierarchy (SDH) are standardized protocols that transfer multiple digital bit streams synchronously over optical fiber using lasers or highly coherent light from light-emitting diodes ...
intermediate layer.
Multivendors
A DWDM network can be implemented using different vendor technology from the IP devices as long as they support alien wavelength transmission specified by ITU-T G.698.2.[Amplified multichannel DWDM applications with single channel optical interfaces", ITU-T G.698.2]
References
External links
(ITU-T , Kaleidoscope event 2009 , conference)
Telecommunications engineering
Network architecture
Telecommunications infrastructure
Fiber-optic communications
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