Communication path control device, communication path control method, and communication path control unit
First Claim
1. A communication path control device for controlling communication paths between a first network and a second network comprising:
- a first interface section for connecting to said first network, wherein said first network is a local area network;
a second interface section for connecting to a first communication path for two-way data transfer with said second network, wherein said second network includes an internet;
a third interface section for connecting to a second communication path having a transmission capacity larger than said first communication path for one-way data transmission from said second network to said first network; and
control means for selecting one of said first communication path and said second communication path as a return path for reply data responsive to an internet protocol packet transmitted from said first network to said second network through said first communication path, wherein data transferred from said second network through said second communication path is data generated by multiplexing a plurality of data addressed to a plurality of destinations, and said control means selects data to be received with reference to a destination address in a packet of multiplexed data.
1 Assignment
0 Petitions
Accused Products
Abstract
A data path control device with a first interface section for connecting to a LAN, second interface section for connecting to an external network through a small transmission capacity two-way line such as a telephone line, and third interface section for receiving a large capacity data from a large transmission capacity one-way line such as a satellite broadcast line. The data path control device changes the sender address of the data transmitted from a computer to a network based on a previously set correspondent relationship, thereby controls the path so that the large capacity data from the network is transmitted through the large transmission capacity one-way line. A path of the reply data from a network responsive to the request data from a computer outputted to an external network is selected by the computer side, and in the case that the reply data is composed of large capacity data, a satellite line having a large transmission capacity can be selected.
47 Citations
29 Claims
-
1. A communication path control device for controlling communication paths between a first network and a second network comprising:
-
a first interface section for connecting to said first network, wherein said first network is a local area network;
a second interface section for connecting to a first communication path for two-way data transfer with said second network, wherein said second network includes an internet;
a third interface section for connecting to a second communication path having a transmission capacity larger than said first communication path for one-way data transmission from said second network to said first network; and
control means for selecting one of said first communication path and said second communication path as a return path for reply data responsive to an internet protocol packet transmitted from said first network to said second network through said first communication path, wherein data transferred from said second network through said second communication path is data generated by multiplexing a plurality of data addressed to a plurality of destinations, and said control means selects data to be received with reference to a destination address in a packet of multiplexed data. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
-
-
14. A communication path control method for controlling communication paths between a first network and a second network, comprising the steps of:
-
transferring an internet protocol packet inputted from said first network through a first interface section to a second interface section, wherein said first network is a local area network;
transferring said internet protocol packet from said second interface section to a first communication path formed for two-way data transmission with said second network, wherein said second network included an internet;
outputting reply data responsive to said internet protocol packet to a third interface section through a second communication path formed for one-way transmission of data from said second network to said first network, said second communication path having a transmission capacity larger than said first communication path; and
selecting one of said first communication path and said second communication path as a return path for said reply data responsive to said internet protocol packet transmitted from said first network to said second network through said first communication path, wherein data transferred from said second network through said second communication path is data generated by multiplexing a plurality of data addressed to a plurality of destinations, and data is selected to be received with reference to a destination address in a packet of multiplexed data. - View Dependent Claims (15, 16, 17, 18, 19, 20)
-
-
21. A communication path control unit for controlling communication paths between a local area network and an internet comprising:
-
a first interface section having a first connection section for connecting to said local area network;
a second interface section having a second connection section for connecting to a first communication path for two-way data transmission with said internet;
a third interface section having a third connection section for connecting to a second communication path having a transmission capacity larger than said first communication path for one-way data transmission from said internet to said local area network;
reception means for receiving satellite broadcast data inputted to said third interface section;
control information memory means for storing a previously set relationship between address information of said local area network and port number information, and between address information of said internet and port number information; and
control means for selecting one of said first communication path and said second communication path as a return path for reply data responsive to an internet protocol packet transmitted from said local area network to said internet through said first communication path, wherein data transferred from said second network through said second communication path is data generated by multiplexing a plurality of data addressed to a plurality of destinations, and said control means selects data to be received with reference to a destination address in a packet of multiplexed data. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29)
-
Specification