Data-transfer routing management for packet-oriented digital communication system including ATM networks
First Claim
1. An asynchronous transfer mode network adapted to be associated with a plurality of data terminals, said network comprising:
- a plurality of data exchange nodes;
a plurality of data transfer links interconnecting said data exchange nodes so that said terminals are connected by corresponding data links associated therewith to said data exchange nodes in said network;
means for selectively establishing in said network a virtual circuit over which a series of data packets including one or a plurality of coded cells are routed from at least one source terminal toward at least one destination terminal, each of said cells having an information field and a header section; and
said means (i) writing, when a cell is transferred from said source terminal to said destination terminal along a presently determined route including selected links associated with a certain data exchange node or nodes, a specific identification parameter being uniform in said network and assigned to said destination terminal into the header section of the cell, and (ii) causing the cell to be transferred to said destination terminal on the basis of the specific identification parameter without changing said specific identification parameter at said certain data exchange node or nodes.
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Accused Products
Abstract
An asynchronous transfer mode (ATM) network includes a plurality of data links interconnecting a plurality of data exchange nodes, and a plurality of data terminals connected by data links associated therewith to the data exchange nodes in the ATM network. In the ATM network, a virtual circuit is selectively established over which a series of data packets including one or a plurality of coded cells is routed from a source terminal toward a destination terminal. Each of these cells includes an information field and a header section. The terminals are assigned with identification parameters respectively, which parameters are uniform in value within the network. When a cell is transferred from the source terminal to the destination terminal along a presently determined route including selected links associated with certain data exchange node or nodes, a specific identification parameter being assigned to the destination terminal is written into the header section of the cell. This cell is then transferred toward the destination terminal on the basis of the specific identification parameter without causing this parameter to be written or converted at the certain data exchange node or nodes in the presently determined route.
272 Citations
19 Claims
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1. An asynchronous transfer mode network adapted to be associated with a plurality of data terminals, said network comprising:
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a plurality of data exchange nodes; a plurality of data transfer links interconnecting said data exchange nodes so that said terminals are connected by corresponding data links associated therewith to said data exchange nodes in said network; means for selectively establishing in said network a virtual circuit over which a series of data packets including one or a plurality of coded cells are routed from at least one source terminal toward at least one destination terminal, each of said cells having an information field and a header section; and said means (i) writing, when a cell is transferred from said source terminal to said destination terminal along a presently determined route including selected links associated with a certain data exchange node or nodes, a specific identification parameter being uniform in said network and assigned to said destination terminal into the header section of the cell, and (ii) causing the cell to be transferred to said destination terminal on the basis of the specific identification parameter without changing said specific identification parameter at said certain data exchange node or nodes. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A packet-oriented data communication network system comprising:
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(a) a plurality of asynchronous transfer mode (ATM) networks each of which is associated with a plurality of data terminals, each comprising, a plurality of data exchange switches, a plurality of data transfer links interconnecting said switches so that said terminals are connected by corresponding data links associated therewith to said switches in each ATM network, means for selectively establishing within said network a virtual circuit over which a series of data packets including one or a plurality of coded cells are routed from a cell transmitter terminal toward a cell receiver terminal, each of said cells having an information field and a header field, said means (i) writing, when a cell is transferred between the transmitter and receiver terminals along a presently determined route including selected links associated with certain switch or switches, a specific identification parameter being uniform in said network and assigned to said receiver terminal into the header field of the cell, and (ii) causing the cell to be transferred to said receiver terminal on the basis of the specific identification parameter without rewriting or converting said specific identification parameter at said certain switch or switches; and (b) network connector devices connecting said ATM networks to one another by data transmission lines in a bidirectionally communicative manner, said network connector devices rewriting or converting, when a request is made to transfer a data cell from at least one of said ATM networks to at least one target network along a presently determined network-to-network route including at least one selected network connector device, said specific identification parameter so as to be adapted for said target network when the data cell passes through said selected network connector device. - View Dependent Claims (11, 12, 13)
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14. A data cell routing method for use in an asynchronous transfer mode network, said ATM network comprising a plurality of data links interconnecting a plurality of network switches, and a plurality of terminals connected by data links associated therewith to said switches in said ATM network, said terminals being assigned with identification parameters uniform in value within said network, said method comprising the steps of:
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selectively establishing in said ATM network a virtual circuit over which a series of data packets including one or a plurality of coded cells is routed from at least one source terminal toward at least one destination terminal, each of said cells having an information field and a header section; writing, when a cell is transferred from the source terminal to the destination terminal along a presently determined route including selected links associated with certain data exchange node or nodes, a specific identification parameter assigned to said destination terminal into the header section of the cell; and transferring said cell to said destination terminal on the basis of the specific identification parameter without rewriting or converting said specific identification parameter at a certain data exchange node or nodes in the presently determined route. - View Dependent Claims (15)
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16. A connection setting method for use in an asynchronous transfer mode network, said ATM network comprising a plurality of data links interconnecting a plurality of network switches, each of said data links having a bandwidth, and a plurality of terminals connected by data links associated therewith to said switches in said ATM network, said method comprising the steps of:
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acquiring, when at least one of said terminals is booted, a virtual path identification parameter for routing that allows the booted terminal to perform a data cell transmission to or from another terminal included in said ATM network; causing said ATM network to set a conversion table between a virtual path identification parameter and a routing tag information to be referred to attain the virtual path identification parameter oriented routing; and setting a connection on the basis of at least one of acquisition of the virtual path identification parameter and negotiation between said at least one terminal and said another terminal. - View Dependent Claims (17, 18)
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19. A connection setting method for use in an asynchronous transfer mode network, said ATM network comprising a plurality of data links interconnecting a plurality of network switches, each of said data links having a bandwidth, and a plurality of terminals connected by data links associated therewith to said switches in said ATM network, said method comprising the steps of:
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acquiring, when at least one of said terminals is booted, a virtual path identification parameter for routing that allows the booted terminal to perform a data cell transmission to or from another terminal included in said ATM network; causing said ATM network to set a conversion table between a virtual path identification parameter and a routing tag information to be referred to attain the virtual path identification parameter oriented routing; setting a connection on the basis of at least one of acquisition of the virtual path identification parameter and negotiation between said at least one terminal and said another terminal is possible for said ATM network under the control of said server; and wherein said connection is a second kind of connection with a request for band management, the setting of a connection is carried out by permitting a server for performing a band assignment to join, and by causing, after a virtual path identification parameter as a connection identification number is acquired, at least one of said at least one terminal and said another terminal to verify whether a band assignment is possible for said ATM network under the control of said server.
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Specification