Data transmission device and data transmission system

Abstract

A data transfer apparatus and a data transfer system are provided that can reduce the cost of installing communication equipment compatible with each of several dissimilar communication protocols in one exchange office and can reduce the cost of constructing the network. The data transfer apparatus includes a data reception device ( 110 ) that receives packets that comply with dissimilar communication protocols from upstream data transfer apparatuses ( 51, 52, and 53 ); a content data extraction device ( 120 ) that extracts content data included in the packets; a line selection information storage device ( 130 ) that stores the line selection information for selecting communication lines that comply with dissimilar communication protocols; a line selection device ( 140 ) that selects the communication line compatible with content data based on the line selection information; and a data transfer device ( 150 ) that transfers data to downstream data transfer apparatuses ( 61, 62, and 63 ) that are connected to the communication line that has been selected by the line selection device.

Description

technical field [0001] The invention relates to a data transmission device and a data transmission system for transmitting data, in particular to a data transmission device and a data transmission system following the network communication protocol. In addition, the present invention particularly relates to a device (hereinafter referred to as a routing device) and a network system for exchanging data packets conforming to the Internet Protocol (hereinafter referred to as IP packets) among data transfer devices, and when a network is constructed using a plurality of routing devices , an efficient technique for these routing devices. Background technique [0002] Among the existing data transmission devices, there is a data transmission device located at the edge of the network, which allocates different optical wavelengths to each target address contained in the IP packet, and time-division multiplexes the allocated optical wavelengths. By transmitting optical signals const...

AI Technical Summary

Problems solved by technology

[0004] However, currently, with the provision of various services such as VPN (Virtual Private Network: Virtual Private Network) and VLAN (Virtual Local Area Network: Virtual Local Area Network) that are rapidly spreading, the tunneling technology required to transmit data efficiently within a single exchange Corresponding communication equipment is provided for each communication protocol that is different from each other, and there is a problem that the cost of communication equipment increases.

[0009] However, when this existing routing device attaches or replaces a label, it needs to add an exchange label to the data packet so that the received data packet can be exchanged in the routing device, and the exchange label must also be retrieved through the target address or label. Obtained, there is a problem of increased processing load

In addition, the cost of routing equipment increases due to the increase in processing load, which also leads to an increase in the cost of network construction.

Images