Multiplex communications – Communication techniques for information carried in plural... – Assembly or disassembly of messages having address headers
Reexamination Certificate
2000-03-10
2001-11-20
Patel, Ajit (Department: 2661)
Multiplex communications
Communication techniques for information carried in plural...
Assembly or disassembly of messages having address headers
C370S419000, C370S476000, C370S466000
Reexamination Certificate
active
06320877
ABSTRACT:
TECHNICAL FIELD OF THE INVENTION
The present invention relates in general to telecommunications data switching and more particularly to a system and method for interfacing a telecommunications system component with a data bus.
BACKGROUND OF THE INVENTION
Modern telecommunications system typically utilize digitally encoded data instead of analog data. If analog data is used, it may be converted to digital data for the purposes of switching the data between conducting media. Switching of data occurs at large telecommunications switches, which may receive and process hundreds or thousands of data channels.
In the process of being switched, digitally encoded data may be transferred over a data bus, which may be any data conductor that allows two or more components to receive and transmit data. For example, where two or more components are connected to a bus, only one component may be transmitting data over the bus, but all other components may be receiving data from the bus. Data buses offer various advantages, but generally require all of the data that is being transmitted over the data bus to be in a single predetermined data format.
For example, a data bus may typically only carry synchronous transfer mode data or asynchronous transfer mode data. Synchronous transfer mode (“STM”) data is characterized by a constant rate data stream that does not contain routing information. Asynchronous transfer mode (“ATM”) data is characterized by a variable rate data stream that includes predetermined packets of information. Contained within each packet is routing information that is used to determine which packets belong to a given data stream.
Known data bus interfaces impose limitations on the ability to use different data formats on the same data bus. These known data bus interfaces limit the use of data buses in telecommunications components such as telecommunications switches.
SUMMARY OF THE INVENTION
Therefore, a need has arisen for a system and apparatus for a data bus interface that allows the reception and transmission of data over a data bus to be precisely controlled.
In accordance with the present invention, a system and circuit for a data bus interface is provided that substantially eliminates or reduces disadvantages and problems associated with previously developed data bus interfaces.
One aspect of the present invention is a system for interfacing with a data bus. The system includes an egress bus data interface that can receive a single incoming stream of STM data and ATM data. The egress bus data interface transmits a single incoming stream of STM data, and a single incoming stream of ATM. The system also includes an ingress bus data interface. The ingress bus interface receives a single outgoing stream of STM data and a single outgoing stream of ATM data. The STM data and ATM data are transmitted in a single outgoing stream.
The present invention provides many important technical advantages. One important technical advantage of the present invention is a system for interfacing with a data bus that allows synchronous transfer mode data and asynchronous transfer mode data to be transmitted over one bus. The data bus interface of the present invention can separate the synchronous transfer mode data and asynchronous transfer mode data from a single data stream, and may combine a synchronous transfer mode data stream and an asynchronous transfer mode data stream into a single data stream.
Another important technical advantage of the present invention is a method for interfacing with a data bus that allows synchronous transfer mode data and asynchronous transfer mode data to be transmitted over one bus. The method for interfacing with a data bus of the present invention separates the synchronous transfer mode data and asynchronous transfer mode data from a single data stream, and combine a synchronous transfer mode data stream and an asynchronous transfer mode data stream into a single data stream.
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Garcia Jose A.
Humphrey Russell L.
Vo Long V.
Alcatel USA Sourcing L.P.
Baker & Botts L.L.P.
Patel Ajit
Phunkulh Bob A.
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