JPH05191413A - Transceiver equipment - Google Patents

Abstract

PURPOSE:To connect transceiver equipments in excess of a maximum number of the transceivers connected to a LAN line in the transceivers connecting the LAN line and equipments on the LAN line. CONSTITUTION:In the case of sending data from an equipment 4 or 5 on a LAN line 1, the physical address of the transceiver equipment 2 is added to transmission data, the location of the physical address of the transceiver equipment 2 and the location of the physical address of the equipment 4 or 5 are replaced and the data are sent and in the case of receiving the data from the LAN line 1, the operation reverse to the transmission is implemented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transceiver device for connecting a LAN line and a device on the LAN line.

[0002]

2. Description of the Related Art Conventionally, a transceiver device of this type does not have a physical address, and the transceiver device itself has a physical address.
The device connected on the AN line had a physical address. Therefore, the maximum number of devices connected to the LAN line has been determined.

[0003]

However, the conventional transceiver device cannot connect more than the maximum number of devices to the LAN line. Therefore, conventionally, LA
If another device is defined under the device connected on the N line and a local address is set for each of the other devices, the number of devices can be connected more than the maximum number.
However, this method has a problem that a device connected to the LAN line needs a special communication procedure for processing the local address, and communication can be performed only between the devices capable of processing the local address by the communication procedure. It was

[0004]

When transmitting data from a device on a LAN line, a transceiver device according to the present invention adds the source physical address of the data to the transmission data and sets the source physical address to the transceiver. When the data is received from the LAN line and the means for transmitting by replacing it with the physical address of, the source physical address is extracted from the transmission data, the source physical address is replaced with the extracted value, and the device on the LAN line is replaced. And means for communicating.

[0005]

The present invention can connect more devices than the maximum number of devices that can be connected on the LAN line.

[0006]

1 is a block diagram showing an embodiment of a transceiver device according to the present invention. In the figure, 1 is a LAN line, 2 and 3 are a first transceiver device and a second transceiver device connected to this LAN line 1, and 4
And 5 are the first connected to this first transceiver device 2.
Device and second device, 6 is this second transceiver device 3
Is a third device connected to. Further, FIG. 2 shows a format of data transmitted from a device on the LAN line.

Further, since the first transceiver device 2 and the second transceiver device 3 have the same structure, a detailed block diagram is shown only for the first transceiver device 2. In the figure, 7 is a LAN side data receiving means for receiving data on the LAN line 1, 8 is a LAN side data transmitting means for transmitting data to the LAN line 1, and 9 is the first device 4
The device-side data receiving means 10 for receiving the data output from the second device 5 and the device-side data transmitting means 10 for sending the data to the first device 4 and the second device 5.

Reference numeral 11 is a physical address adding means for adding the physical address of the transceiver device to the data sent from the device side data receiving means 9, and 12 is a physical address for replacing the order of the data output from the physical address adding means 11. The replacing means 13 is a physical address removing means for removing the physical address of the added transceiver device.

Next, the operation of the transceiver device having the above configuration will be described. For example, the transmission data from the first device 4 is transmitted from the first transceiver device 2 → LAN line 1 → second
A case of transmitting to the third device 6 via the transceiver device 3 will be described with reference to FIGS. 3 (A) to 3 (E). First, the first device 4 assembles the transmission data into a data format of the format shown in FIG. 3A and sends it to the device-side data receiving means 9 of the first transceiver device 2. The device-side data receiving means 9 receives the data of this format and sends it to the physical address adding means 11.

The physical address adding means 11 adds the physical address of the transceiver device 2 to the data, assembles the data in the format shown in FIG. 3B, and sends it to the physical address replacing means 12. Then, the physical address replacing means 12 receives the data of this format format, replaces the source physical address, that is, the physical address of the first device 4 with the physical address of the first transceiver device 2, and as shown in FIG. The data in the format shown is sent to the LAN side data sending means 8.

Then, the LAN side data transmitting means 8 sends the data of the format shown in FIG.
Send to. Then, the data transmitted on the LAN line 1 is received by the LAN side data transmitting means 7 of the second transceiver device 3. Then, the data receiving means 7 sends the received data to the physical address replacing means 12, and the physical address replacing means 12 sends the physical address of the source in the data, that is, the physical address of the first transceiver device 2 and the first device. 4 is replaced with the physical address of FIG.
The data in the format shown in (D) is sent to the physical address removing means 13.

Then, the physical address removing means 13 removes the physical address of the first transceiver device 2 from the data of the format shown in FIG. 3D to obtain the data of the format shown in FIG. Transmission means 1
Send to 0. Therefore, the device-side data transmitting means 10 can transmit the data in the format shown in FIG. 3 (E) to the third device 6. With such a procedure, the data transmitted from the first device 4 can be received by the third device 6 without being affected by the data processing in the transceiver device.

In the above description, the case where the transmission data is transmitted from the first device 4 to the third device 6 has been described, but the present invention is not limited to this, and the transmission data is transmitted from the second device 5 to the third device 6.
Of course, the same can be transmitted to the device 6. At this time, the transmission data from the first device 4 and the second device 5 becomes the transmission data from the first transceiver device 2 when viewed from the LAN line, and when N devices are connected to the transceiver device, the LAN data is transmitted. The maximum number of devices that can be connected on the line can be the maximum number XN of devices that can be connected to the LAN line.

[0014]

As described in detail above, according to the transceiver device of the present invention, the device connected to the LAN line does not process a special communication procedure and the
L devices that exceed the maximum number that can be connected on the line
There is an effect that it can be connected to an AN line.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of a transceiver device according to the present invention.

FIG. 2 is a diagram showing a format of data transmitted from a device on a LAN line.

FIG. 3 is a diagram showing a data format when communication data is transmitted from a first device to a third device.

[Explanation of symbols]

 2, 3 Transceiver device 4, 5, 6 device 7 LAN side data receiving means 8 LAN side data transmitting means 9 Device side data receiving means 10 Device side data transmitting means 11 Physical address adding means 12 Physical address replacing means 13 Physical address removing means

Claims (1)

[Claims] 1. A LAN-side data transmitting means for transmitting data to a LAN line, and an L for receiving data from the LAN line.
AN-side data receiving means, device-side data transmitting means for transmitting data to a device on a LAN line, device-side data receiving means for receiving data from a device on a LAN line, and physical for adding a physical address to transmission data A transceiver device comprising: address adding means, physical address removing means for removing a source physical address added to data from received data, and physical address replacing means for replacing a source physical address of data. ..