Module comprising in an ATM exchange connection ports, each transmitting a cell indicative of a destination module in a cell header
First Claim
1. An asynchronous time division exchange system for transferring transmission data comprising a highway bus;
- a local module and one or more remote modules coupled to each other by said highway bus, each of said modules comprising a connection control unit connected to said highway bus, a plurality of connection ports, and a module bus connecting said connection ports to said connection control unit, each of said connecting ports being responsive to a transmission signal, and including means for adding to said transmission signal a first header indicating a destination module number as a virtual path identifier when said transmission signal is directed to one of said remote modules and indicating a destination port number as the virtual path identifier when said transmission signal is directed to one of the connection ports of said local module, and for transferring said transmission signal and header as a data cell to said module bus.
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Accused Products
Abstract
In a local module (11(1)) of an asynchronous time division exchange or switching system, each of connection ports (17) transfers a transmission signal to a module bus (19) as a cell with its header made to indicate a destination module number and a destination port number as a VCI (Virtual channel identifier) when the signal is directed to a destination module (11(N)) and one of the connection ports, respectively. Preferably, a connection control unit (15) of the local module transfers and does not transfer the cell to a highway bus (13) when the signal is directed to the destination module and the last-mentioned one of the connection ports. More preferably, the header additionally indicates a binary one and zero bit when the signal is directed to the destination module and the last-mentioned one of the connection ports.
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Citations
22 Claims
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1. An asynchronous time division exchange system for transferring transmission data comprising a highway bus;
- a local module and one or more remote modules coupled to each other by said highway bus, each of said modules comprising a connection control unit connected to said highway bus, a plurality of connection ports, and a module bus connecting said connection ports to said connection control unit, each of said connecting ports being responsive to a transmission signal, and including means for adding to said transmission signal a first header indicating a destination module number as a virtual path identifier when said transmission signal is directed to one of said remote modules and indicating a destination port number as the virtual path identifier when said transmission signal is directed to one of the connection ports of said local module, and for transferring said transmission signal and header as a data cell to said module bus.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
- 12. An asynchronous time division exchange system for transferring transmission data among a plurality of modules connected to each other through a highway bus, each of said modules comprising a connection control unit connected to said highway bus, a plurality of connection ports, and a module bus connecting said connection ports to said connection control unit, each of said connection ports being responsive to a transmission signal, one of the modules being a destination module to which said transmission signal is directed, and one of said modules including said destination module being an originating module, wherein a connection port of said originating module transfers said transmission signal together with a first header to the module bus of said originating module as a data cell, said first header indicating a destination module number as a virtual path identifier when said destination module is different from said originating module and a destination port number as the virtual path identifier when said destination module is identical with said originating module.
- 18. An asynchronous time division exchange system comprising a plurality of modules and a highway bus connecting said modules, said exchange system transferring transmission data among said modules, each module comprising a connection control unit connected to said highway bus, a plurality of connection ports, and a module bus connecting said connection ports to said connection control unit, each connection port being responsive to a transmission signal, wherein each of said connection ports in a first one of said modules is for transferring said transmission signal to the module bus of said one of the modules as a cell with header data indicating a destination module number as a virtual path identifier when said transmission signal is directed to a different one of said modules and a destination port number as the virtual path identifier when said transmission signal is directed to one of the connection ports of said first module.
Specification