Multiplex communications – Pathfinding or routing – Switching a message which includes an address header
Patent
1996-05-30
1999-01-19
Patel, Ajit
Multiplex communications
Pathfinding or routing
Switching a message which includes an address header
370375, 370376, H04L 1228, H04L 1256
Patent
active
058621369
ABSTRACT:
A telecommunications apparatus for transporting ATM cells having either of isochronous units of payload data and asynchronous units of payload data, between receiving and transmitting ports includes a buffer for asynchronously queuing units of payload data received from the receiving ports and for subsequently transmitting the queued units of payload data in a time division multiplex data stream toward the transmitting ports. A timeslot interchanger is used to reorder a time defined sequence of isochronous units of payload data from the first data stream into a second time defined sequence of isochronous units of payload data in a second TDM data stream. An outgoing TDM data stream is assembled by transferring the first data stream into the outgoing data stream while substituting each payload occurrence of isochronous units from the second TDM data stream, into corresponding TDM locations in the outgoing data stream. The outgoing data stream is transmitted toward the transmitting ports whereby telephone calls are connected via the isochronous units of payload data. Delay typically inherent in telephone conversations connected via prior ATM facilities and the consequent severe echo often experience by users is substantially reduced.
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"Asynchronous Time-Division Techniques: An Experimental Packet Network Integrating Videocommunication" by A. Thomas et al., 1984 International Switching Symposium.
"Prelude: An Asynchronous Time-Division Switched Network" by Jean-Pierre Coudreuse and Michel Serval, 1987 IEEE.
Fortin Jean-Pierre
Moorhouse J. Edward
Northern Telecom Limited
Patel Ajit
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