JP2000261484A - Ether-atm signal transforming unit and signal transforming method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an Ether-ATM signal transforming unit that converts a plurality of Ether protocols and a plurality of ATM protocols. SOLUTION: A system employing the Ether-ATM signal converter consists of PCs 22, 23 connected to a HUB 11 that transmits/receives an Ether signal 20, devices 32, 33 connected to an ATM-SW 31 that sends/receives an ATM cell 30, and the Ether-ATM signal converter 10 provided with an ATM transmission reception section 11 that sends/receives the ATM cell 30, with an Ether transmission reception section 13 that transmits/receives the Ether signal 20, with a table section 14 that displays routing information to the ATM cell 30, and with a signal conversion control section 12 that controls for converting the Ether signal 20 and the ATM cell 30.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to Ether-ATM signal conversion, and more particularly, to an Ether-ATM signal converter between a plurality of PC terminals using the Ether protocol and a plurality of devices using the ATM protocol.

[0002]

2. Description of the Related Art In communication technology between computer terminals, anyone can easily make settings at low cost.
There is Ethernet widely used worldwide. However, with an increase in the number of communication users using a network and an increase in the amount of data handled in communication accompanying the development of multimedia, it has been desired to reduce communication time without damaging the communication system.

[0003] Therefore, in multimedia communication that can convert moving images and voices into digital information and transmit and receive the information, packet switching and circuit switching technologies are expected to be used in future media communication networks. An Ethernet-ATM signal converter that enables conversion between the ATM protocol and the above-described Ethernet protocol widely used worldwide has been used.

[0004]

The above-described conventional Eth
With the er-ATM signal converter, conversion with the plural-to-one Ether protocol and the ATM protocol is possible, but there is no signal converter of the plural Ether protocols and the plural ATM protocols.

The present invention solves the above-mentioned conventional disadvantages,
It is an object of the present invention to provide an Ether-ATM signal converter that converts between a plurality of Ether protocols and a plurality of ATM protocols.

[0006]

In order to solve the above-mentioned object, according to the present invention, Eth in a network system is provided.
an ATM transmission / reception unit for transmitting / receiving ATM cells from an ATM-SW for routing a plurality of ATM cells in an er-ATM signal converter, an Ether transmission / reception unit for transmitting / receiving a plurality of signals from EtherHUB, an ATM signal and an Ether signal And a table unit for holding data information transmitted from the signal control unit.

[0007] Et of the first invention of the present application having the above configuration
The her-ATM signal converter uses an ATM protocol provided with packet switching control and circuit switching technology while utilizing the environment of the conventional Ether protocol, so that the conventionally used Ether protocol and a plurality of ATM protocols can be used. Since transmission and reception can be performed between, a wide area network can be constructed.

According to a second aspect of the present invention, there is provided a signal conversion control unit according to the first aspect, wherein the signal conversion control unit has a function of allocating VPI and VCI and a function of designating a plurality of IP addresses.
It is characterized by being a other-ATM signal converter.

The signal conversion control section of the second invention of the present application having the above configuration has a function of allocating VPI and VCI,
Ability to specify multiple IP addresses enables multiple ATMs
Transmission / reception with the Ether protocol is enabled for each device using the protocol, and multiple-to-multiple transmission / reception between each device using the ATM protocol and a terminal using the Ether protocol is enabled, so that a wide area network Can be built.

According to a third aspect of the present invention, the function of allocating VPIs and VCIs according to the first or second aspect is a function of Ether-ATM signal conversion for performing plural-to-multiple transmission and reception by allocating VPIs and VCIs. It is characterized by being a vessel.

The VP according to the third invention of the present application having the above configuration.
The function of distributing I and VCI enables multiple-to-multiple transmission and reception by identifying VPI and VCI used for transfer of ATM cells, and can construct a wide area network.

According to a fourth aspect of the present invention, there is provided a function of designating a plurality of IP addresses according to the first, second, or third aspect, wherein the Ether side designates a plurality of ATM-side IP addresses from the Ether side. -It is an ATM signal converter.

[0013] The IP of the fourth invention of the present application having the above configuration.
The function that can specify multiple addresses is A
Since a plurality of addresses can be specified for each device using the TM protocol instead of specifying one address, a plurality of transmissions and receptions can be performed, and a wide area network can be constructed.

According to a fifth aspect of the present invention, there is provided an ATM transmission / reception unit according to the first, second, third or fourth aspect, wherein the ATM transmission / reception unit receives a plurality of ATMs from respective devices corresponding to a plurality of ATM protocols.
It is an Ether-ATM signal converter for transmitting and receiving cells.

The AT according to the fifth invention of the present application having the above configuration.
The M transmitting / receiving unit transmits / receives ATM cells to / from each device, so that multiple-to-multiple transmission / reception is possible, and a wide area network can be constructed.

According to a sixth aspect of the present invention, there is provided the Et according to the first, second, third, fourth or fifth aspect.
The her transmission / reception unit is an Ether-ATM signal converter that transmits signals from a plurality of Ether protocols to respective devices corresponding to a plurality of ATM protocols.

The Et of the sixth aspect of the present invention having the above-described structure.
The her transmission / reception unit transmits signals from a plurality of Ether protocols to each device corresponding to a plurality of ATM protocols, so that a plurality of transmission / receptions can be performed and a wide area network can be constructed.

[0018]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a block diagram showing one embodiment of an Ether-ATM signal converter system.
PCs 22 and 23 connected to the HUB 11 for transmitting and receiving the Ether signal 20 and devices 32 and 33 connected to the ATM-SW 31 for transmitting and receiving the ATM cell 30
ATM transmission / reception unit 1 for transmitting / receiving ATM cells 30
1. An E / E including an Ether transceiver 13 for transmitting and receiving the Ether signal 20, a table 14 for holding routing information for the ATM cell 30, and a signal conversion controller 12 for controlling the conversion between the Ether signal 20 and the ATM cell 30.
and the other-ATM signal converter 10.

FIG. 3A shows a parameter setting request signal format used when information necessary for relaying by the Ethernet-ATM signal converter 10 is set from the PC 22. The VPI and VCI at the beginning of the signal are
And transmission to the device 33, Ether-ATM
It is determined whether it is up to the signal converter 10.

It is determined whether the signal type in the signal is the format shown in FIG. 3A or 3B. The total number of parameters indicates the next number of IDs. ID is PC2
2 or PC23. The number of parameters indicates the number of subsequent VPIs and VCIs as one set. VPI and VCI values are stored in the table unit 14
Set to.

FIG. 3B shows a user data signal format used between the Ether-ATM signal converter 10 and the PCs 22 and 23. V at the beginning of the signal
The PI and VCI determine whether to transmit to the device 32 and the device 33 or to the Ether-ATM signal converter 10. It is determined whether the signal type in the signal is the format shown in FIG. 3A or 3B. The number of all parameters and the ID are fixed at 1 and have no meaning. Length
Indicates the number of bytes of the following information element.

FIG. 3C shows a table format 14 of the Ether-ATM signal converter 10 for information set in the parameter setting request signal format. The ATM cell transmitted from the device 32 or 33 is
It is used to determine whether to hand over to C22 or PC23.

The present invention will be described with reference to FIG. When the power of PC 22 is turned on and reset, Ethe
The r signal 20 is transmitted to the Ether-ATM signal converter 10. The Ether transmitting / receiving unit 13 receives the received Eth
The er signal 20 is passed to the signal conversion controller 12. The signal conversion control unit 12 sets information in the Ether signal 20 in the table unit 14. ATM from device 32 and device 33
-When the ATM transmitting / receiving unit 11 receives the ATM cell 30 via the SW 31, the ATM cell is transferred to the signal conversion control unit 12.

The signal conversion control section 12 searches the table section 14 based on the VPI and VCI of the header in the ATM cell. If they do not match, discard them. If they match, the corresponding PC22 or PC23 sends an Ether signal 2
0 is transmitted to the Ether-ATM signal converter 10.
The Ether transmitting and receiving unit 13 receives the Ether signal 2
0 is passed to the signal conversion control unit 12.

The signal conversion control section 12 outputs the Ether signal 2
0 is set in the ATM cell, and the ATM
It passes to the transmission / reception unit 11. The ATM transmitting / receiving unit 11 transmits the data to the corresponding device 32 or 33 via the ATM-SW 31.

FIG. 2 is a flowchart for explaining the procedure of the Ether-ATM signal converter system.
Step 201 determines whether or not there is a reception. Step 2
02 determines whether the data is received from the ATM-SW 31 or the hub 21. In the case of reception from the HUB 21, the process flows to step 203. Step 203 determines whether the received signal is a parameter setting request or a user data signal based on the signal type. In the case of a user data signal, the process flows to step 204.

In steps 204 and 205, the VPI and VCI of the user data signal are copied to the ATM cell header. A step 206 transmits the message to the ATM-SW 31. In step 207, the value of the ID is set on the PC side of the table from the parameter setting request, and the values are set on the VPI and VCI of the EtherNet side for the number of parameters.

At step 208, step 209, and step 210, the VPI and VCI of the ATM cell header are compared with the VPI and VCI of the table.
The IP address of C22 or PC23 is set and transmitted from step 211. If they do not match, A
Discard the TM cell. It should be noted that the present invention is not limited to the above-described embodiment, and can be implemented with various modifications within the scope of the technical idea.

[0029]

As described above, the Ether of the present invention
According to the ATM signal converter, transmission and reception between a plurality of terminals using the Ether protocol and a plurality of devices using the ATM protocol are possible. Therefore, a wide area organic network can be constructed by using the packet switching technology of the Ether protocol and the ATM protocol which are conventionally commercially available.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an overall configuration of an embodiment of the present invention.

FIG. 2 is a flowchart illustrating the operation of one embodiment of the present invention.

FIG. 3A is a diagram showing a signal format of a parameter setting request. FIG. 4B is a diagram illustrating a signal format of a user data signal. (C) is a diagram showing details of a table.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Ether-ATM signal converter 11 ATM transmission / reception part 12 Signal conversion control part 13 Ether transmission / reception part 14 Table part 20 Ether signal 21 HUB 22 Personal computer 23 Personal computer 30 ATM cell 31 ATM-SW 32 apparatus 33 apparatus

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 5K030 GA08 HA10 HB14 HC14 HD07 HD09 JA06 KA15 5K033 AA09 CA08 CB02 CB08 CB14 DA06 DB18 EC04 5K034 AA20 EE10 FF11 HH04 HH07 HH16 HH61

Claims (6)

[Claims] 1. Ethe in a network system
In the r-ATM signal converter, an ATM transmitting / receiving unit for transmitting / receiving ATM cells from an ATM-SW for routing a plurality of ATM cells, an Ether transmitting / receiving unit for transmitting / receiving a plurality of signals from EtherHUB, an ATM signal and an Ether signal An Ether-ATM, comprising: a signal control unit for performing a conversion of the data; and a table unit for holding data information transmitted from the signal control unit.
Signal converter. 2. The method according to claim 1, wherein the signal conversion control unit includes a VPI and a VC.
2. The Eth according to claim 1, wherein the Eth has a function of assigning I and a function of specifying a plurality of IP addresses.
er-ATM signal converter. 3. The Ether-ATM signal converter according to claim 1, wherein the function of allocating the VPI and the VCI performs a plurality of transmissions and receptions by allocating the VPI and the VCI. 4. The Ethernet according to claim 1, wherein the function of designating a plurality of IP addresses is to designate a plurality of IP addresses on an ATM side from an Ether side. ATM signal converter. 5. The Ether according to claim 1, wherein said ATM transmitting / receiving unit transmits / receives ATM cells from respective devices corresponding to a plurality of ATM protocols. -ATM signal converter. 6. The Ether transmission / reception unit includes a plurality of Ets.
The signal according to claim 1, 2, 3, 4, or 5, wherein a signal from the her protocol is transmitted to a plurality of devices corresponding to the ATM protocol.
her-ATM signal converter.