ATM communication system with high speed connection-less service function
DCFirst Claim
1. A network system comprising:
- a first network having a first connection-less service function unit;
a second network having a second connection-less service function unit;
a data transfer unit for specifying a first connection for a transfer at a layer lower than a network layer from the data transfer unit through the first and second networks to the second connection-less service function unit and for transferring a datagram onto the first connection when the datagram is to be transferred from a source terminal located on or beyond the first network from a viewpoint of the second network, through the first network to a destination terminal located on or beyond the second network from a viewpoint of the first network.
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Abstract
ATM communication system capable of realizing a high speed and efficient datagram delivery for the connection-less communication among the terminals in the ATM network. In the system formed by a plurality of ATM networks inter-networking with each other, each network containing a plurality of terminals, the ATM networks with connection-less service function units for managing a connection-less datagram transmission are provided in the ATM networks, and the connection-less datagram transmission from each terminal to a destination terminal is performed by resolving a connection identifier for identifying an ATM connection connected to a destination side connection-less service function unit associated with a destination side ATM network containing the destination terminal, and transmitting datagram from said each terminal to the destination side connection-less service function unit through the ATM connection identified by the resolved connection identifier.
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Citations
25 Claims
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1. A network system comprising:
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a first network having a first connection-less service function unit; a second network having a second connection-less service function unit; a data transfer unit for specifying a first connection for a transfer at a layer lower than a network layer from the data transfer unit through the first and second networks to the second connection-less service function unit and for transferring a datagram onto the first connection when the datagram is to be transferred from a source terminal located on or beyond the first network from a viewpoint of the second network, through the first network to a destination terminal located on or beyond the second network from a viewpoint of the first network. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of data transfer in a network system including a first network having a first connection-less service function unit and a second network having a second connection-less service function unit, the method comprising the steps of:
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specifying a first connection for a transfer at a layer lower than a network layer from the data transfer unit through the first and second networks to the second connection-less service function unit when a datagram is to be transferred from a source terminal located on or beyond the first network from a viewpoint of the second network, through the first network to a destination terminal located on or beyond the second network from a viewpoint of the first network; and transferring the datagram onto the first connection specified in the specifying step. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
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19. A data transfer apparatus in a network system including a first network having a first connection-less service function unit and a second network having a second connection-less service function unit, the apparatus being located on or beyond the first network from a viewpoint of the second network and comprising:
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a connection specifying unit for specifying a first connection for a transfer at a layer lower than the network layer from the data transfer apparatus through the first and second networks to the second connection-less service function unit when a datagram is to be transferred from a source terminal located on or beyond the first network from a viewpoint of the second network, through the first network to a destination terminal located on or beyond the second network from a viewpoint of the first network; and a datagram transferring unit for transferring the datagram onto the first connection specified by the connection specifying unit. - View Dependent Claims (20, 21, 22, 23, 24, 25)
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Specification