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Lightpath (optical Network)
In optical networking, a lightpath is a path between two nodes in an optical network between which light passes through unmodified. Description When a lightpath can be established between source and destination node endpoints the connection is totally optical and avoids wikt:throttling, throttling by intermediate electronic conversions and processing. Where a lightpath passes through an Optical add-drop multiplexer (OADM) is known as a ''cut-through lightpath''. Where a lightpath is added or dropped at an OADM, it is known as an ''added/dropped lightpath''. Semi-lightpath Where endpoints are connected by a series of lightpaths with the intermediate nodes only changing the light wavelength at the junctions this may be referred to as a semi-lightpath. See also * Wavelength switched optical network * Multicast lightpaths * Network Description Language References {{reflist Fiber-optic communications ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Optical Networking
Optical networking is a means of communication that uses signals encoded in light to transmit information in various types of telecommunications networks. These include limited range Local area network, local-area networks (LAN) or wide area networks (WANs), which cross metropolitan and regional areas as well as long-distance national, international and transoceanic networks. It is a form of optical communication that relies on Optical amplifier, optical amplifiers, lasers or Light-emitting diode, LEDs and wavelength-division multiplexing (WDM) to transmit large quantities of data, generally across fiber-optic cables. Because it is capable of achieving extremely high Bandwidth (computing), bandwidth, it is an enabling technology for the Internet and communication networks, telecommunication networks that transmit the vast majority of all human and machine-to-machine information. Types Fiber-optic networks The most common Fiber-optic network, fiber-optic networks are communication n ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Throttling
A throttle is any mechanism by which the power or speed of an engine is controlled. Throttle or throttling may also refer to: Fiction * ''Throttle'' (film), a 2005 thriller * ''Throttle'' (novella), a 2009 novella by Stephen King and his son Joe Hill * Throttle, one of the three main characters of ''Biker Mice from Mars'' Science and technology * Rocket engine throttling * Thrust lever or throttle lever, a device for controlling aircraft engines * Throttling process (thermodynamics), an isenthalpic process in thermodynamics Computing * CPU throttling, computer hardware speed control, also known as dynamic frequency scaling * Bandwidth throttling, used to control the bandwidth that a network application can use * Throttling process (computing), software speed control Other uses * Strangling, compression of the neck * DVD-by-mail throttling, the process of penalizing the most active users in subscription-based DVD-by-mail businesses, by slowing shipments or sending less desirab ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Optical Add-drop Multiplexer
An optical add-drop multiplexer (OADM) is a device used in wavelength-division multiplexing (WDM) systems for multiplexing and routing different channels of light into or out of a single-mode fiber (SMF). This is a type of optical node, which is generally used for the formation and the construction of Optical networking, optical telecommunications networks. "Add" and "drop" here refer to the capability of the device to add one or more new wavelength channels to an existing multi-wavelength WDM signal, and/or to drop (remove) one or more channels, passing those signals to another network path. An OADM may be considered to be a specific type of optical cross-connect. A traditional OADM consists of three stages: an optical demultiplexer, an optical multiplexer, and between them a method of reconfiguring the paths between the demultiplexer, the multiplexer and a set of ports for adding and dropping signals. The demultiplexer separates wavelengths in an input fiber onto ports. The r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wavelength
In physics and mathematics, wavelength or spatial period of a wave or periodic function is the distance over which the wave's shape repeats. In other words, it is the distance between consecutive corresponding points of the same ''phase (waves), phase'' on the wave, such as two adjacent crests, troughs, or zero crossings. Wavelength is a characteristic of both traveling waves and standing waves, as well as other spatial wave patterns. The multiplicative inverse, inverse of the wavelength is called the ''spatial frequency''. Wavelength is commonly designated by the Greek letter lambda (''λ''). For a modulated wave, ''wavelength'' may refer to the carrier wavelength of the signal. The term ''wavelength'' may also apply to the repeating envelope (mathematics), envelope of modulated waves or waves formed by Interference (wave propagation), interference of several sinusoids. Assuming a sinusoidal wave moving at a fixed phase velocity, wave speed, wavelength is inversely proportion ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wavelength Switched Optical Network
Wavelength switched optical network (WSON) is a type of telecommunications network. A WSON consists of two planes: the data and the control planes. The data plane comprises wavelength-division multiplexing (WDM) fiber links connecting optical cross-connect (OXCs) through a comb of several tens of wavelength channels, with typical data rates of 10 or 40 Gbit/s. Optical end-to-end connections (i.e., Lightpath (optical network), lightpaths) are established in the optical domain and switched by OXCs at the wavelength granularity. The dynamic provisioning and maintenance of lightpaths is managed by the control plane. The control plane is implemented on a separate network and typically employs one network controller for each node in the data plane, as shown in the figure. The Generalized Multi-Protocol Label Switching (GMPLS) protocol suite, the de facto standard control plane for WSONs proposed by the Internet Engineering Task Force, IETF, is composed of three protocols.A. Farrel ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Multicast Lightpaths
A multicast session requires a "point-to-multipoint" connection from a source node to multiple destination nodes. The source node is known as the ''root''. The destination nodes are known as ''leaves''. In the modern era, it is important to protect multicast connections in an optical mesh network. Recently, multicast applications have gained popularity as they are important to protecting critical sessions against failures such as fiber cuts, hardware faults, and natural disasters. Multicast applications Multicast applications may include multimedia, medical imaging, digital audio, HDTV, Videoconferencing, video conferencing, Distance education, interactive distance learning, and distributed games. Multi-casting switch architecture In order to support multi-casting, the Wavelength-division multiplexing, WDM network requires multicast-capable wavelength-routing switches at the network node. These switches are capable of replicating data streams from one input port to multiple o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
