JPH0998191A - Atm-ethernet data converter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To inexpensively improve signal quality by integrating an ATM switch, ATM-Ethernet data converter and switching hub in one casing. SOLUTION: An ATM switch 1 mutually connects ATM devices connected to an ATM line and extracts data received by an 'Ethernet(R)'. An ATM- Ethernet data converter 3 mutually converts/edits the ATM data of 150Mbps and the Ethernet data of 10Mbps. An Ethernet switching hub 4 mutually connects Ethernet terminal equipment 11-20 connected to an Ethernet line and is mutually connected with the ATM line through the ATM-Ethernet data converter 3. Since the ATM switch, ATM-Ethernet data converter and switching hub are integrally housed in one casing, circuits such as an ATM transceiver and an ATM/Ethernet interface to be required when respectively separating these parts are omitted.

Description

Detailed Description of the Invention

[0001]

[Industrial application] Multi-media communication that handles digitalized video and audio interactively, video-on-demand for consumers, multimedia online shopping, videophone from corporate multimedia database Next-generation communications, which are expected to have a wide range of applications, have begun to be put into practical use. ATM communication technology, which has a wide range of advantages, has been developed as an ideal communication means for constructing these media communication networks. On the other hand, the Ethernet communication line, which is one of the communication technologies between computer devices on the conventional extension line, has been internationally standardized and widely spread. In the present invention, a high speed ATM communication line, which is one of these new communication technologies, is used as a relatively low speed Ethernet that is widely used in computer communication.
The present invention relates to a data conversion device that converts data to a t communication line.

[0002]

2. Description of the Related Art FIG. ATM in the figure
(Asynchronous Trancefer M
The communication line based on the ode) has recently been touted as a multimedia transmission line, and the multimedia is being mainly used in various fields as a data communication line having a simple transmission data format and a high transmission speed of 150 Mbps. In addition, Ethernet (IEEE
LAN specified by the [Local Aria Net
communication method) The communication line has a transmission speed of 10M.
Although it is relatively slower than bps and ATM communication lines, it is widely used for in-area communication (LAN) which is a transmission line suitable for data communication between computer devices. Therefore, the ATM-Ethernet conversion device has been developed because the multimedia transmission includes the data transmission of the computer device. However, as described above, due to the difference in the transmission speed and the transmission format of the ATM transmission line and the Ethernet transmission line, the data conversion device is actually large and expensive.

[0003]

In the present invention, the AT
In an M-Ethernet data converter (hereinafter simply referred to as "converter"), a converter is built in a switching hub that is a distribution connection point on the Ethernet communication side, and transmission between the converter and the switching hub is performed. Inexpensive ATM-Ethern by omitting data processing and parts
It is to provide an et data conversion device.

[Object of the invention]

[0004]

In order to solve the above problems, the present invention provides an ATM switch and an ATM-Ethe.
It is composed of an rnet data conversion device, an Ethernet switching hub, and an Ethernet terminal device.

[0005]

In the present invention having the above means, the ATM switch is a switch for connecting various ATM devices connected to the ATM communication line to each other. ATM-E
The internet data converter is 150 Mb shown in FIG.
The ATM transmission format of ps is 10 Mbp shown in FIG.
It is a data conversion device for converting to the s Ethernet transmission format and / or vice versa, which has conventionally been a device equipped in an independent housing. The Ethernet switching hub is a data distribution device addressed to each input Ethernet terminal device. It is an object of the present invention to provide an inexpensive data converter in which the independent ATM switch, the ATM-Ethernet data converter, and the switching hub are integrated into one housing.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an ATM-Et which is an embodiment of the present invention.
It is a block diagram of a hernet data converter. FIG.
FIG. 3 is an ATM cell format diagram input from an ATM communication line. FIG. 3 shows a conventional ATM-Ethernet.
It is a block diagram of a data converter. Figure 4 is Ether
It is a frame format diagram of a net communication line. As shown in FIG. 2 and FIG. 4, the transmission formats of both ATM and Ethernet communication lines are completely different. Especially, when the transmission data capacity is ATM communication line, the effective data capacity transmitted at one time is 48 bytes. On the other hand, Ether
Up to 150 (although variable length) for a net communication line
There is a big difference between 0 bytes and 30 times or more. Details of other differences are as shown in FIGS. 2 and 4. The configuration of the conventional example is shown in FIG. In the figure, the ATM switch 41 is A
It is a switching device for connecting various ATM devices connected to the TM communication line and connecting them to each other, and also functions to extract the necessary data from the ATM communication line to be received by the system. AT received by ATM switch 41
The M data is sent by the ATM transceiver 43 to ATM-Eth.
The data is rearranged so that it can be transmitted / received by the internet conversion device 45 and transmitted to the ATM transceiver 44. The ATM data received by the ATM transceiver 44 is ATM-Et.
Input to the hernnet converter 45.

The ATM-Ethernet converter 45 temporarily stores the received ATM data in an ATM memory (not shown), and then at the processing / transfer speed of 150 Mbps as described above, the ATM format data (hereinafter referred to as "ATM data"). From 10 Mbps to Eth
The data is re-edited to the Ethernet format data (hereinafter referred to as "ETH data"), and Ether
It is stored and stored in a net memory (not shown). The converted and accumulated ETH data is transmitted to the Ethernet switching hub 47 via an ATM / Ethernet interface (hereinafter referred to as [A / E.IF]) 46. On the other hand, the Ethernet switching hub 47 receives the converted ETH received via the A / E IF 46.
The data is rearranged to each Ethernet terminal device 11-20 connected to each Ethernet line, and transmission and reception are sequentially performed. On the other hand, the Ethernet terminal device 11-20 input through each Ethernet line
The ETH is transmitted and received to and from another ATM system 2 connected to the ATM communication line by the data processing reverse to the reverse route.

The above is the outline of the processing from the reception of conventional ATM data to the transmission / reception of data to / from the Ethernet terminal device. In the present invention, as shown in FIG.
Since the ATM data input to the M switch is converted into ETH data and the terminals connected to each Ethernet terminal device 11-20, that is, various devices up to the switching hub are integrated into one device (housing), FIG. ATM transceivers 43 and 44 shown in FIG.
The feature is that F46 is deleted and the circuit is simplified.
Therefore, it is possible to prevent the data from being deteriorated due to intermediate data processing / transfer as compared with the conventional device, improve the data processing speed, and improve the signal quality such as lack of data.
A significant cost reduction is possible by deleting / or simplifying the intermediate circuit group. In addition, because it is an all-in-one type, it is natural that the various device groups that were conventionally mounted in three cases were changed to one, and many other advantages were obtained, resulting in high quality data and / or low cost ATM-Ethe
An rnet data converter can be provided.

[0009]

As described above, the ATM-Et according to the present invention
According to the hernnet data converter, the conventional independent data converters, Ethernet switching,
Like a hub device, because it can do intermediate data processing to connect both devices, simplify the transmission circuit, etc.,
Due to the fact that the signal quality of the data can be improved, the case is incorporated in one unit, and many other advantages over the conventional device, the cost can be significantly reduced, and an inexpensive device can be provided.

[Brief description of drawings]

FIG. 1 is an ATM-Ethern according to an embodiment of the present invention.
It is a block diagram of an et data converter.

FIG. 2 is an ATM cell format diagram input from an ATM communication line.

FIG. 3 is a block diagram of a conventional ATM-Ethernet data converter.

FIG. 4 is a frame format diagram of an Ethernet communication line. 1/41, ATM switch 2, other ATM system connected to ATM 3/45, ATM-Ethernet data conversion device 4/47, Ethernet switching hub device 11-20, Ethernet communication terminal device 42/43, ATM transceiver Device 46, A / E interface device

Claims (1)

[Claims] 1. An ATM-Ethernet data conversion device, wherein an ATM switch for connecting to another ATM device in the conversion device, and an ATM data to Ethernet switch.
AT data and / or AT from Ethernet data
Data conversion device for mutual conversion of M data, and Et
ATM-Ethe which is provided with a switching hub for connecting to each terminal device of the hernet communication line
rnet data converter.