Connectionless communication system
First Claim
1. A communication system for transmitting at least one fixed-length cell converted from a variable-length information including data and a destination of the data, comprising:
- at least one cell assembly/disassembly means for performing bi-directional conversion between said variable-length information and said fixed-length cell;
at least one routing control means for receiving said fixed-length cell converted from said variable-length information by said cell assembly/disassembly means, for analyzing the destination of the data and for controlling a routing of said fixed-length cell based on the analyzed destination, said at least one routing control means including error detecting means for detecting an error of said variable-length information in said fixed-length cell; and
a network for connecting said at least one cell aassembly/disassembly means and said at least one routing control means by a fixed capacity path and for connecting said at least one routing control means to each other by one of said fixed capacity path and a variable capacity path.
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Abstract
A communication system for transmitting a fixed-length cell converted from a variable-length information including data and a destination of the data. The system includes a cell assembly/disassembly device for performing bi-directional conversion between the variable-length information and the fixed-length cell, a routing control device for receiving the fixed-length cell converted from the variable-length information by the cell assembly/disassembly device, for analyzing the destination of the data and for controlling a routing of the fixed-length cell based on the analyzed destination, and having an error detecting device for detecting an error of the variable-length information in the fixed-length cell, and a network for connecting the cell assembly/disassembly device and the routing control device by a fixed capacity path and for connecting the routing control device to another routing control device by the fixed capacity path or a variable capacity path.
77 Citations
14 Claims
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1. A communication system for transmitting at least one fixed-length cell converted from a variable-length information including data and a destination of the data, comprising:
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at least one cell assembly/disassembly means for performing bi-directional conversion between said variable-length information and said fixed-length cell; at least one routing control means for receiving said fixed-length cell converted from said variable-length information by said cell assembly/disassembly means, for analyzing the destination of the data and for controlling a routing of said fixed-length cell based on the analyzed destination, said at least one routing control means including error detecting means for detecting an error of said variable-length information in said fixed-length cell; and a network for connecting said at least one cell aassembly/disassembly means and said at least one routing control means by a fixed capacity path and for connecting said at least one routing control means to each other by one of said fixed capacity path and a variable capacity path. - View Dependent Claims (2, 3, 4, 5)
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6. A communication system for transmitting at least one fixed-length cell converted from a variable-length information including data and a destination of the data, comprising:
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at least one cell assembly/disassembly means for performing bi-directional conversion between said variable-length information and said fixed-length cell; at least one routing control means for receiving said fixed-length cell converted from said variable-length information by said cell assembly/disassembly means, for analyzing the destination of the data and for controlling a routing of said fixed-length cell based on the analyzed destination, said at least one routing control means including error processing means for detecting an error of said variable-length information in a first cell, including the destination of the data, of a plurality of cells into which the variable-length information has been segmented, and rejecting all of the cells following the first cell in which a message identifier has been placed; and a network for connecting said at least one cell assembly/disassembly means and said at least one routing control means by a fixed capacity path and for connecting said at least one routing control means to one another by one of said fixed capacity path and a variable capacity path. - View Dependent Claims (7, 8, 9, 10)
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11. A communication system for transmitting at least one fixed-length cell converted from a variable-length information including data and a destination of the data, comprising:
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a plurality of routing control means for receiving said fixed-length cell converted from said variable-length information, for analyzing the destination of the data and for controlling a routing of said fixed-length cell based on the analyzed destination, said routing control means including error detecting means for detecting an error of said variable-length information in said fixed-length cell and alerting means for alerting the error to the other of said plurality of routing control means; and a network for connecting said routing control means to each other by one of a fixed capacity path and a variable capacity path.
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12. A communication system for transmitting at least one fixed-length cell converted from a variable-length information including data and a destination of the data, comprising:
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a plurality of routing control means for receiving said fixed-length cell converted from said variable-length information, for analyzing the destination of the data and for controlling a routing of said fixed-length cell based on the analyzed destination, said routing control means including error processing means for detecting an error in a first cell, having a message header, of a plurality of cells into which a message corresponding to the variable-length information has been segmented, and rejecting all of the cells following the first cell in which a message identifier has been placed, and alerting means for alerting the error to the other of said plurality of routing control means; and a network for connecting said routing control means to each other by a fixed capacity path or a variable capacity path.
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13. A routing apparatus, connected via a first virtual connection to a converting apparatus, said converting apparatus converting variable-length information from a transmitting side including data and destination information into a fixed length packet, said routing apparatus comprising:
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receiving means for receiving said fixed-length packet from the converting apparatus via the first virtual connection, said fixed-length packet having a header indicating the first virtual connection; analyzing means for analyzing said destination information included in said fixed-length packet and determining a second virtual connection to route said fixed-length packet to a destination; control means for rewriting said header in said fixed-length packet to indicate the second virtual connection; sending means for sending said fixed-length packet to a receiving side via said second virtual connection; error detecting means for detecting an error of said variable-length information in said fixed-length packet; and alerting means for alerting said error to another routing apparatus which is located in said receiving side of said fixed-length packet.
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14. An exchange apparatus, connected via a virtual connection to a converting apparatus, the converting apparatus converting information including data and destination information from a transmitting side into at least one cell which is a fixed-length packet and assigning a header indicating a destination to the cell, said exchange apparatus receiving the cell via the virtual connection, said exchange apparatus comprising:
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switching means for switching the cell according to the header of the cell; and routing processing means, connected to said switching means, for receiving the cell with the header, for analyzing the destination information of the information and for generating a corresponding result, for rewriting the header of the cell according to the result, for sending the cell to a receiving side in response to said result, for detecting an error of said information in said cell, and for alerting said error to another exchange apparatus which is located in said receiving side of said cell.
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Specification