KR100775425B1 - System and method for port path redundancy of ATM terminal - Google Patents

Abstract

The present invention provides a port path duplication system for an asynchronous transmission mode terminal communication device that enables the service to be performed smoothly without interruption when a port path of the terminal communication device occurs when interworking with a public network between the asynchronous transmission mode terminal communication devices. On that method,

The present invention provides a working port which is a main transmission port for each transceiver of the terminal communication apparatus which interworks with the public network; A protection port which transfers and services when a failure of the working port occurs; It is characterized by consisting of a microprocessor for detecting the failure occurrence and the failure release state of the working port at a predetermined time interval to switch from the working port to the protection port according to the detected state, and to switch from the protection port to the working port again. It is done.

Port, redundancy, transfer,

Description

System and method for port path redundancy of ATM terminal in asynchronous transmission mode terminal communication device

1 is a block diagram of a port path duplication system of a conventional asynchronous transmission mode terminal communication apparatus;

2 is a working port path transmission diagram of the asynchronous transmission mode terminal communication apparatus of the present invention.

3 is a protection port path transmission diagram of the asynchronous transmission mode terminal communication device of the present invention;

Figure 4 is a flow chart of the port path duplication system of the asynchronous transmission mode terminal communication apparatus of the present invention.

* Explanation of symbols for the main parts of the drawings *

100,200; Terminal communication apparatus TX; transmitter

RX; Receiver working; Walking port

protection; Protection port MPU; Microprocessor

The present invention relates to a port path duplication system of an asynchronous transmission mode terminal communication apparatus, and more particularly, when the service is interworked with the public network between the asynchronous transmission mode terminal communication apparatus, the service is interrupted when a failure occurs in the port path of the terminal communication apparatus. The present invention relates to a port path duplication system of an asynchronous transmission mode terminal communication apparatus so as to be performed smoothly.

In general, the asynchronous transmission mode terminal communication device is connected to a public network capable of transmitting a large number of services such as voice, video, data at high speed to transmit and receive services with other terminal communication devices.

The asynchronous transmission mode terminal communication apparatus interworking with the public network may transmit and receive services between terminal communication apparatuses in a point to point or point to multi point method. It is configured to enable a bidirectional service, and the point-to-multipoint method is configured to allow only one-way communication.

Therefore, when the asynchronous terminal communication device that performs the point-to-point bidirectional service interworking with the public network, a dedicated port (working port; In addition to the port), it is necessary to configure a protection port to assist the working port separately.

The working port refers to a primary transmission / reception port for transmitting and receiving all data through a public network between terminal communication devices, and is also referred to as a primary port (primary port).                         

The protection port is a redundancy port having the same function as a working port, and is a port that can be used as a temporary transmission / reception port by a microprocessor when a failure occurs in the working port. Also called a secondary port.

Thus, when the terminal communication device is interworking with various public networks, a failure occurs in a working port, which is a main transmission / reception port, due to its own defect or an external factor in any one of the terminal communication device. In this case, the communication path is blocked between the terminal communication devices so that the transmission and reception service is not performed.

Therefore, a protection port which is an auxiliary transmission / reception port that can secure a communication channel at any time instead of the working port in order to prevent the transmission / reception service from being interrupted due to the failure of the working port during the service. This is because a transmission / reception service can be achieved only when a protection port is provided. Nevertheless, referring to the terminal communication apparatus 100 and 200 interworking with a conventional public network, as shown in FIG. (TX) (RX) is composed of only one working port (working port), for example, when a failure occurs in the working port (working port), the transceiver (TX) of the terminal communication device (100) (200) RX) has a problem that the bidirectional service is not achieved at all.

Of course, in the prior art, port duplication is not implemented in the transceiver (TX) RX in order to prevent interruption of service due to a line and other external factors in the terminal communication device 100 and 200.                         

However, the terminal communication device implementing the port duplication is possible only in a device having the same transmission scheme or the same digital signal level specification between the devices, and only implemented in hardware.

Therefore, even though the port duplication is implemented in the conventional terminal communication apparatus, since the operation is performed in hardware, the transmission method or the digital signal level is made in the same format, and in other formats, there is a limitation in using a service that cannot perform smooth service. In addition, there is also a problem that wastes time and expense in accordance with the inspection and maintenance that should be checked or repaired hardware from time to time.

An object of the present invention is to enable port duplication and automatic port switching to a transceiver of a terminal communication device interworking with a public network, so that a service is automatically made through another port when a failure occurs in any one of the duplicated ports. Then, if a normal service is available to the faulted port, the service is switched back to the normalized port so that the service due to the port failure is smoothly performed without interruption.

In order to realize the above object, the present invention provides a working port which is a main transmission port in each of a transceiver of a terminal communication apparatus interworking with a public network; A protection port which transfers and services when a failure of the working port occurs; It is characterized by consisting of a microprocessor for detecting the failure occurrence and the failure release state of the working port at a predetermined time interval to switch from the working port to the protection port according to the detected state, and to switch from the protection port to the working port again. It is done.

In order to realize the present invention, the present invention duplicates a working port and a protection port to a transceiver of a terminal communication device that works in conjunction with a public network, and if a failure occurs in the working port among the duplicated ports, transfers to a protection port and performs a transmission / reception service. Making a step; Determining whether a failure of the working port is released by detecting a working port in which the failure occurs at a predetermined interval during the service to the protection port in the step; If the failure of the working port is not released, the service proceeds to the protection port, and if the failure of the working port is characterized in that the transmission and reception service is performed by switching the protection port of the transceiver back to the working port.

Therefore, according to the present invention, when a service is performed between terminals and communication devices through a public network, the service is switched to a protection port when a failure occurs in the working port, which is the main transport port, and when the failure is released, the service is transferred to the working port again. By doing so, the service quality can be greatly improved by stabilizing the service that is continuously performed due to the port failure during the service.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

FIG. 2 is a block diagram of a traffic path duplication system of an asynchronous transmission mode terminal communication apparatus according to the present invention, comprising: a transmitter (TX) for transmitting input data to a public network and a receiver (RX) for receiving data transmitted from a public network. A communication device 100; A terminal communication device (200) comprising a receiver (RX) for receiving data transmitted from the terminal communication device (100), and a transmitter (TX) for transmitting the input data to a public network; Each of the transceivers TX and RX of the terminal communication apparatus 100 and 200 includes a working port serving as a main transmission port; A protection port which transfers data when the working port is interrupted and transmits data; Detects the failure and failure release state of the working port at predetermined time intervals, transfers to a protection port when a failure of the working port occurs, and protects a protection port when the failure occurs. It is composed of a microprocessor (MPU) equipped with an Automatic Protection Switching (ASP) algorithm for switching from a port to a working port.

3 is a protection port transmission diagram of an asynchronous transmission mode terminal communication device according to the present invention, and is switched to a protection port when a working port failure of a transceiver TX between the terminal communication devices 100 and 200 occurs. It shows the state that is transmitted.

FIG. 4 is a flow chart of a port path duplication system of an asynchronous transmission mode terminal communication device of the present invention, which is a working port of a transmission / reception transmitter TX between a terminal communication device serving through a public network. Detecting (401) at (RX) whether a failure occurs in a working port of the transmitting and receiving transmitter (TX); Detecting whether the transmission / reception protection port is normal when detecting a working port of the transmission / reception transmitter TX to the transmission / reception receiver RX in step 401; ; In step 402, when the transmission / reception protection port is detected as normal, both the transmission / reception receivers RX transmit a message for switching the working port to the protection port. Step 403); The transmitting / receiving transmitter TX that receives the message for switching the working port transmitted in the step 403 to the protection port protects the working port of the transmitting / receiving transmitter TX. Switching to a port (protecion port) (404); Serving (405) a protection port switched at both the TX and RX in step 404; In step 405, the transmitter / receiver transceiver TX (RX) serves as a protection port, and the receiver receiver RX detects whether a working port of the transmitter TX has been released. Step 406; In step 406, when the transmitting and receiving receiver RX detects a failure release state of the working port of the transmitter TX, the transmitting and receiving receiver RX detects a working port failure in the transmitter TX. Sending (407) a release message; In step 407, when a working port failure release message is received at the transmitting / receiving receiver RX, the transmitting / receiving transmitter TX switches a protection port to a working port (408). )Wow; In step 408, a service 409 is provided to a working port transferred to the transmitting and receiving transmitter TX.

As shown in FIG. 2, the present invention made as described above includes a terminal communication device 100 including a transceiver (TX) (RX) each having a working port and a protection port. Through the working network (working port) and the protection port (protection port) through the public network in the other terminal communication device 200 configured via a communication port (TX) (RX) through the working port (working port) which is the main transmission port The service will proceed.

The microprocessor (MPU) of the terminal communication device (100) 200 during the mutual transmission and reception service to the working port (working port) between the transceiver (TX) (RX) of the terminal communication device (100) (200) In each case, the working port of the transmitter / receiver transmitter TX detects a failure that may be caused by its own defect or an external factor through the receiver RX of the transceiver side (step 401).

At this time, when a failure occurs in the working port of the transmission / reception transmitter TX through the transmission / reception receiver RX, the microprocessor (MPU) of the terminal communication apparatus 100 (200) is automatically preset. The protection port of the TX / RX TX is in a normal state so that data transmitted to a working port due to a failure due to a switching algorithm is not interrupted and continuous service can be performed. While detecting whether the service is available (step 402), the microprocessor (MPU) on the transmission / reception side protects the working port of the receiver (RX) on the transmission / reception side by operating an automatic protection switch (APS). In addition to switching to the protection port, a message to be switched to the protection port is transmitted to the transmitter TX on the transmission / reception side (step 403).                     

The transmitter TX of the transmitting and receiving side receives a protection port transfer message transmitted, and the microprocessor MCU transmits a working port of the transmitter TX of the transmitting and receiving side in an APS control operation. port is replaced with a protection port (step 404).

Therefore, as shown in FIG. 3, the transceiver TX / RX of the terminal communication apparatus 100 or 200 is serviced by a switched protection port (step 405).

On the other hand, in the state where the working port of the transmission / reception transmitter TX is serving as a protection port that has been switched off, the transmission / reception transmitter microprocessor (MPU) transmits and receives the transmitter at the transmission / reception side. In step 406, a failure release (normal service) of the working port is detected at a predetermined time interval arbitrarily set for the working port of TX.

At this time, if a failure release is not detected at the working port of the transmitter / receiver transmitter TX through the transmitter / receiver receiver RX in the microprocessor (MPU), the transceiver TX / RX is protected. The service will continue to the protection port.

On the other hand, if a failure release is detected in the transmitter / receiver transmitter TX through the transmitter / receiver receiver RX in the microprocessor (MPU), the microprocessor (MPU) uses an automatic protection switching (APS) algorithm to determine the receiver of the transmitter / receiver side. Transmit the protection port of the RX to a working port, and transmit a message for switching the protection port to a working port to a transmitter TX on the transmitting and receiving side. (Step 407).

Accordingly, in the transmitter TX, the protection port of the TX transceiver RX is changed to a working port by a control operation by an automatic protection switching (APS) algorithm of the microprocessor (MPU). (Step 408).

Therefore, the transmitting / receiving side transceiver (TX) RX of the terminal communication apparatus 100 (200) serves as a switching working port (working) (step 509).

As described above, the present invention duplicates a port of a transceiver of a terminal communication device serving through a public network into a working port and a protection port, and if a failure occurs in the working port among the duplicated ports, the service is transferred to the protection port. Subsequently, if the failure of the working port is detected by detecting whether the working port is released, the service is switched to the working port from the protection port to the working port to stabilize the service among the terminal communication devices. It will provide an effect that can greatly improve the.

Claims (3)

Each of the transceivers of the terminal communication apparatus for transmitting and receiving a service bidirectionally through a public network includes a working port which is a main transmission port of input data; A protection port which transfers data when the working port is interrupted; Port path of the asynchronous transmission mode terminal communication device, characterized in that the detection of the failure and failure release of the working port at randomly set time intervals and the microprocessor for switching between the working port and the protection port according to the detected state Redundancy system. The port path duplication system of claim 1, wherein the microprocessor is configured to switch the working port and the protection port to automatic protection switching. Performing a transmission / reception service by switching to a protection port when a failure occurs in a working port among the duplicated ports by duplexing a working port and a protection port to a transceiver of a terminal communication device serving in connection with a public network; Determining whether a failure of the working port is released by detecting a working port in which the failure occurs at a predetermined interval during the service to the protection port in the step; If the failure of the working port is not released, the service proceeds to a protection port, and if the failure of the working port is performed, switching the protection port of the transceiver back to the working port and performing a transmission / reception service, comprising: A port path duplication method for a mode terminal communication device.

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