Data switching method and data switching apparatus for efficiently handling scan data in information communication network
First Claim
1. A data switching method for a data switching apparatus which operates as one of a plurality of data switching nodes arranged on an ATM network, the plurality of data switching nodes forming a trunk system, wherein the data switching apparatus and at least one terminal form a branch system, said data switching method comprising:
- performing a first data switching operation for the branch system, wherein data is transmitted between said data switching apparatus and said at least one terminal; and
performing a second data switching operation for the trunk system, independently of the first data switching operation, wherein data is transmitted along a predetermined transmission path from an upstream-side data switching node of the plurality of data switching nodes to a downstream-side data switching node of the plurality of data switching nodes;
wherein the second data switching operation for the trunk system includes the substeps of (i) sorting data transmitted from said upstream-side data switching node into scan data and message data, (ii) duplicating the scan data to generate duplicate scan data and (iii) scan-transmitting one of the scan data and the duplicate scan data to said downstream-side data switching node and (iv) transmitting the message data to said downstream-side data switching node, andwherein the second data switching operation for the branch system includes a step of scan-transmitting a remaining one of the scan data and the duplicate scan data to said at least one terminal connected to said data switching apparatus.
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Accused Products
Abstract
In a data switching method for switching data among data switching apparatuses arranged on an ATM network and interconnected by links along a cell data transmission path, data input to a specified one of the data switching apparatuses from an upstream-side one of the data switching apparatuses along the transmission path is sent out to a downstream-side one of the data switching apparatuses along the transmission path. A branch-system data switching operation for delivering data, which has been input to the specified data switching apparatus from at least one terminal linked to the specified data switching apparatus, to a specified one of the terminals and the data switching apparatuses, is performed separately from a trunk-system data switching operation for delivering data, which has been input to the specified data switching apparatus from the upstream-side data switching apparatus, to the downstream-side data switching apparatus and terminals.
27 Citations
24 Claims
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1. A data switching method for a data switching apparatus which operates as one of a plurality of data switching nodes arranged on an ATM network, the plurality of data switching nodes forming a trunk system, wherein the data switching apparatus and at least one terminal form a branch system, said data switching method comprising:
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performing a first data switching operation for the branch system, wherein data is transmitted between said data switching apparatus and said at least one terminal; and performing a second data switching operation for the trunk system, independently of the first data switching operation, wherein data is transmitted along a predetermined transmission path from an upstream-side data switching node of the plurality of data switching nodes to a downstream-side data switching node of the plurality of data switching nodes; wherein the second data switching operation for the trunk system includes the substeps of (i) sorting data transmitted from said upstream-side data switching node into scan data and message data, (ii) duplicating the scan data to generate duplicate scan data and (iii) scan-transmitting one of the scan data and the duplicate scan data to said downstream-side data switching node and (iv) transmitting the message data to said downstream-side data switching node, and wherein the second data switching operation for the branch system includes a step of scan-transmitting a remaining one of the scan data and the duplicate scan data to said at least one terminal connected to said data switching apparatus. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A data switching method for a data switching apparatus which operates as one of a plurality of data switching nodes connected to each other through a transmission path on an ATM network, and which is connected to at least one terminal, said data switching method comprising the steps of:
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sorting data, transmitted from an upstream-side data switching node of the plurality of data switching nodes and said at least one terminal, into scan data and message data, multi-casting the scan data to a downstream-side data switching node of the plurality of switching nodes and said at least one terminal; and transmitting the message data to one of said at least one terminal and said downstream-side data switching node. - View Dependent Claims (10, 11)
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12. A data switching method for an apparatus which operates as one of a plurality of data switching nodes connected to each other through a transmission path on an ATM network, said data switching method comprising the steps of:
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determining whether or not cell data transmitted from an upstream-side data switching node of the plurality of data switching nodes is scan data based on an identifier of a cell header of the cell data; and outputting the scan data to the transmission path such that the scan data is multiplexed with other data at a higher priority than the other data.
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13. A data switching apparatus provided on an ATM network and connected to at least one communication node via a link for transmitting cell data, said apparatus comprising:
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trunk-system ports including a trunk system input port for receiving cell data from the at least one communication node and a trunk system output port for transmitting cell data to the at least one communication node; means for sorting the cell data received from the at least one communication node into scan data and message data; an ATM switch for passing the message data to the trunk system output port associated with a content of the cell header of a message data; scan data switching means for receiving the scan data into the data switching apparatus at an input port and for outputting the received scan data to an output port linked to the input port; branch-system port means functioning as a branch system input port for receiving data from at least one terminal and a branch system input port for transmitting data to said at least one terminal independent of the trunk-system ports; and means for sending the data received from the at least one terminal at the branch-system input port to the branch-system output port and the trunk-system output port. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21)
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22. A data switching apparatus provided on an ATM network, said apparatus comprising:
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a plurality of input ports for receiving cell data from communication nodes and terminals connected to the data switching apparatus through links on the ATM network; a plurality of output ports for transmitting cell data from communication nodes and terminals connected to the data switching apparatus through the links on the ATM network; determination means, provided for said associated input ports, for determining the type of the cell data; an ATM switch for switching message data input from the determination means to the output ports; and multi-destination communication means for copying scan data input from the determination means and multi-destination transmitting the copied data to the output ports. - View Dependent Claims (23, 24)
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Specification