Time-driven switching
Encyclopedia
In Telecommunication
and Computer networking, Time-Driven Switching (TDS) is a node by node time variant implementation of Circuit switching
, where the propagating datagram is shorter in space than the distance between source and destination. With TDS it is no longer necessary to own a complete circuit between source and destination, but only the fraction of circuit where the propagating datagram is temporarily located.
TDS adds flexibility and capacity to Circuit Switched networks but requires precise synchronization among nodes and propagating datagrams.
Datagrams are formatted according to schedules that depend on Quality of service
and availability of switching nodes and physical links. Respect to Circuit switching
the added time dimension introduces additional complexity to network management. Like Circuit switching
, TDS operates without buffers and header processing according to the pipeline forwarding
principle; therefore an all optical implementation with Optical fibers and Optical Switches is possible with low cost. The TDS concept itself pervades and is applicable with advantage to existing data switching technologies, including Packet switching
, where packets, or sets of packets become the datagrams that are routed through the network.
TDS has been invented in 2002 by Prof. Mario Baldi and prof. Yoram Ofek of Synchrodyne Networks, Inc. that is the assignee of several patents issued by both the United States Patent and Trademark Office
and the European Patent Office
.
Telecommunication
Telecommunication is the transmission of information over significant distances to communicate. In earlier times, telecommunications involved the use of visual signals, such as beacons, smoke signals, semaphore telegraphs, signal flags, and optical heliographs, or audio messages via coded...
and Computer networking, Time-Driven Switching (TDS) is a node by node time variant implementation of Circuit switching
Circuit switching
Circuit switching is a methodology of implementing a telecommunications network in which two network nodes establish a dedicated communications channel through the network before the nodes may communicate. The circuit guarantees the full bandwidth of the channel and remains connected for the...
, where the propagating datagram is shorter in space than the distance between source and destination. With TDS it is no longer necessary to own a complete circuit between source and destination, but only the fraction of circuit where the propagating datagram is temporarily located.
TDS adds flexibility and capacity to Circuit Switched networks but requires precise synchronization among nodes and propagating datagrams.
Datagrams are formatted according to schedules that depend on Quality of service
Quality of service
The quality of service refers to several related aspects of telephony and computer networks that allow the transport of traffic with special requirements...
and availability of switching nodes and physical links. Respect to Circuit switching
Circuit switching
Circuit switching is a methodology of implementing a telecommunications network in which two network nodes establish a dedicated communications channel through the network before the nodes may communicate. The circuit guarantees the full bandwidth of the channel and remains connected for the...
the added time dimension introduces additional complexity to network management. Like Circuit switching
Circuit switching
Circuit switching is a methodology of implementing a telecommunications network in which two network nodes establish a dedicated communications channel through the network before the nodes may communicate. The circuit guarantees the full bandwidth of the channel and remains connected for the...
, TDS operates without buffers and header processing according to the pipeline forwarding
Pipeline forwarding
Pipeline forwarding applies to packet forwarding in computer networks the basic concept of pipelining, which has been widely and successfully used in computing — specifically, in the architecture of all major central processing units — and manufacturing — specifically in assembly lines of...
principle; therefore an all optical implementation with Optical fibers and Optical Switches is possible with low cost. The TDS concept itself pervades and is applicable with advantage to existing data switching technologies, including Packet switching
Packet switching
Packet switching is a digital networking communications method that groups all transmitted data – regardless of content, type, or structure – into suitably sized blocks, called packets. Packet switching features delivery of variable-bit-rate data streams over a shared network...
, where packets, or sets of packets become the datagrams that are routed through the network.
TDS has been invented in 2002 by Prof. Mario Baldi and prof. Yoram Ofek of Synchrodyne Networks, Inc. that is the assignee of several patents issued by both the United States Patent and Trademark Office
United States Patent and Trademark Office
The United States Patent and Trademark Office is an agency in the United States Department of Commerce that issues patents to inventors and businesses for their inventions, and trademark registration for product and intellectual property identification.The USPTO is based in Alexandria, Virginia,...
and the European Patent Office
European Patent Office
The European Patent Office is one of the two organs of the European Patent Organisation , the other being the Administrative Council. The EPO acts as executive body for the Organisation while the Administrative Council acts as its supervisory body as well as, to a limited extent, its legislative...
.
See also
- Data transmissionData transmissionData transmission, digital transmission, or digital communications is the physical transfer of data over a point-to-point or point-to-multipoint communication channel. Examples of such channels are copper wires, optical fibres, wireless communication channels, and storage media...
- Digital communications
- Communication network
- Network architectureNetwork architectureNetwork architecture is the design of a communications network. It is a framework for the specification of a network's physical components and their functional organization and configuration, its operational principles and procedures, as well as data formats used in its operation.In...