KR20040077358A - Apparatus and Method for diagnostic of IMA link - Google Patents

Abstract

PURPOSE: An apparatus and a method for diagnosing an IMA(Inverse Multiplexing over ATM) link are provided to perform online diagnosing on a specific link of an ATM IMA link by selectively removing and monitoring a filler cell of the specific link when the filler cell is replaced with a diagnosis cell and received. CONSTITUTION: In a diagnosis permitted state, a transmission cell processor(110) removes a filler cell and inserts a diagnosis cell. A filler cell detector(120) monitors only cells transmitted to a pertinent link among cells inputted from an IMA, and if a filler cell is detected, the filler cell detector(120) informs each part of a transmitter accordingly. In the diagnosis permitted state, when a diagnosis cell generator(130) is informed detection of the filler cell, the diagnosis cell generator(130) generates a diagnosis cell and outputs it to a transmission cell processor(110). A transmission controller(140) performs a function of generating a reset signal with respect to each part according to a reset signal transmitted from a processor and controlling an operation of each part according too the diagnosis permission.

Description

Apparatus and Method for diagnostic of IMA link}

According to the present invention, when using inverse multiplexing over ATM (IMA) in an ATM trunk, an on-line diagnosis of a specific link of an ATM IMA link is carried out by replacing a filler cell of a specific link with a diagnostic cell and selectively removing and monitoring the receiving cell. The present invention relates to an on-line diagnostic apparatus and method for a specific link through substitution of a filler cell for a specific link with a diagnostic cell when using an IMA, and particularly, between the IMA and the TC. By adding a device according to the present invention, the filler cell of the IMA is replaced with the diagnostic cell, and when received, the diagnostic cell is extracted and delivered to the diagnostic processor, and then replaced with the filler cell to be transmitted to the IMA. The present invention relates to an AMA link diagnosis apparatus and method for enabling diagnosis.

In general, as the mobile communication service is diversified, many technologies for accommodating various information data in addition to the existing voice have emerged. Accordingly, ATM (Asynchronous Transfer Mode) technology is being introduced into mobile communication services. There are a few important things to consider when introducing ATM into mobile services. That is, since the transmission path between the base station and the control station is generally leased from the communication service provider, it is the most efficient way to use the transmission path and to quickly fail back to avoid interruption of service in the event of a failure in the transmission path.

In case of transmission line failure, the ATM standard suggests an Inverse Multiplexing over ATM (IMA) solution to the problem. The main function of IMA is to provide inverse multiplexing on a cell-by-cell basis for multiple physical links. Thus, IMA enables efficient use of bandwidth over a given number of links (E1 / T1). The location of the IMA's protocol stack is located between the Physical Layer Interface Specific Transmission Convergence (TC) sublayer and the ATM layer.

On the other hand, IMA provides the bandwidth of the configured number of links. This does not affect the order of ATM cells. Referring to FIG. 1, FIG. 1 is a diagram illustrating a multiplexing and demultiplexing process of an ATM cell via an IMA group. In FIG. 1, the Tx IMA group receives the ATM cell stream from the ATM layer and sends the ATM cell stream to the Rx IMA. These cells allow the Tx IMA group to form the original cell stream. These cells are called IMA Control Protocol (ICP) cells. When there is no cell to be sent through the link, the Tx IMA group sends a cell having no meaning as data for cell rate decoupling. This is called a filler cell. The Rx IMA group receives the filler cell.

On the other hand, in the prior art, as described above, when using the IMA, multiple trunks are grouped and operate, which makes it difficult to diagnose specific links.

In addition, a diagnostic ATM packet is used for on-line diagnosis, which causes a problem that the effective data bandwidth is reduced due to the packet. Also, as the number of diagnostic packets increases for more accurate diagnosis, the effective data bandwidth is used. There was a problem that the loss of.

Accordingly, the present invention is proposed to solve the above problems of the prior art,

SUMMARY OF THE INVENTION An object of the present invention is to provide an on-line diagnostic apparatus and method for a specific link by replacing a filler cell for a specific link with a diagnostic cell when using inverse multiplexing over ATM (IMA) in an ATM trunk. When using IMA in ATM trunks, it is possible to perform online diagnostics of specific links on ATM IMA links by replacing filler cells on specific links with diagnostic cells and selectively removing and monitoring them when receiving. The present invention provides an IC link diagnosis apparatus and method that prevents a decrease in effective data bandwidth due to diagnosis because a band of unused filler cells is used.

The present invention for achieving the above object,

In the ATM trunk processor of the inverse multiplexing over ATM (IMA) system,

The IMA ATM trunk processor is configured to include a transmitter and a receiver which are added between the IMA and the TC (Transmission Convergence) to selectively diagnose only a specific link by inserting a diagnostic cell.

The transmitting unit,

In the case of the diagnosis permission state, all of the IMA cells are simply passed. In the case of the diagnosis permission state, the transmitting cell processor which processes the removal of the filler cell and the insertion of the diagnostic cell and only the transmitting cell through the corresponding link among the cells input from the IMA. A filler cell detector for monitoring and notifying each part (PART) in the transmitting unit when a filler cell is detected, and a diagnostic cell in a diagnostic permission state, and generating a diagnostic cell when the filler cell detection is notified, and thus a transmitting cell at a later stage. The apparatus includes a diagnostic cell generator that performs a function of outputting to a processor, and a transmission controller that performs a reset signal generation function for each part according to a reset signal from a processor, and an operation control function of each part according to whether or not to permit diagnosis. Features of the composition,

The receiving unit,

When a diagnostic cell is detected by monitoring a cell of a corresponding link among the cells received from the TC, a diagnostic cell detector which notifies each part of the receiver and outputs the diagnostic cell, and removes the diagnostic cell and then fills it in the position. Receiving cell processor that performs the function of inserting the cell and outputs to IMA, and monitors the diagnostic cell received with the diagnostic cell notification to perform various diagnostic functions such as error and statistics. It consists of a diagnostic cell processor that outputs to the processor through a reset signal generation function for each part according to the reset signal from the processor, an output function through the processor interface for the diagnosis result, and a control controller for each part. It is characterized by the device configuration.

In addition, the present invention for achieving the above object,

In the ATM trunk using the IMA, a process of performing a specific link diagnosis by selectively inserting a diagnostic cell only for a specific link added between the IMA unit and the TC unit, and transmitting and replacing the filler cell from the IMA with the diagnostic cell in the transmitting unit In addition, the process of inverting the diagnostic cell back to the filler cell and supplying it to the IMA at the receiver and controlling the replacement of the diagnostic cell into the filler cell according to whether the diagnosis is allowed or not, selectively performing general IMA functions and functions for diagnosis. It is made, including

The processing in the transmitting unit,

When a reset signal is input and each part is initialized, the processor sets a diagnosis permission and a diagnosis target link number to each part through a transmission controller, and when the diagnosis permission and the diagnosis target link number are set, the filler cell detector And monitoring only the cells of the corresponding link among the cells input from the IMA and notifying each part when a filler cell is detected, and confirming the diagnostic permission setting when the filler cell detector is notified from the filler cell detector in the transmitting cell processor. And if the check result is not in the diagnosis permission state, simply passing the IMA cell, and in the case of the diagnosis permission state, removing the filler cell and replacing the diagnosis cell from the diagnosis cell generator at the position. Characterized by its methodological composition,

The processing in the receiving unit is

When a reset signal is input and each part is initialized, the processor sets a link number to be diagnosed to each part through a reception controller, and when the link number is set, a diagnostic cell detector detects a corresponding link among cells input from the TC. Monitoring only the cells and notifying each part when a diagnostic cell is detected; and when a diagnostic cell is detected from the diagnostic cell detector by a receiving cell processor, removing the diagnostic cell, replacing the filler cell, and outputting the same to the IMA; And monitoring the diagnostic cells received with the diagnostic cell detection notification in the diagnostic cell processor, performing various diagnostic functions such as errors and statistics, and outputting the results to the processor through the reception controller. It features.

1 is a diagram illustrating a multiplexing and demultiplexing process of an ATM cell via a general IMA group.

2 is a view showing the structure of a transmitter used in addition between IMA and TC in the ATM trunk processor of the IMA method according to the present invention,

3 is a view showing the structure of a receiver used in addition between the IMA and TC in the ATM trunk processor of the IMA method according to the present invention,

4 is a diagram illustrating a processing procedure in a transmitter for diagnosing IMA link according to the present invention;

5 is a diagram illustrating a processing procedure in a receiver for diagnosing IMA link according to the present invention.

<Explanation of symbols for the main parts of the drawings>

110 ..... Outgoing cell processor

120 ..... Filler Cell Detector

130 ..... Diagnostic Cell Generator

140 ..... Transmission Controller

210 ..... Diagnostic Cell Detector

220 ..... incoming cell handler

230 ..... Diagnostic Cell Handler

240 ..... Receive Controller

Hereinafter, a preferred embodiment of the "AM link diagnosis apparatus and method" of the present invention according to the above technical concept will be described in detail with reference to the accompanying drawings.

First, the present invention is used in addition to the IMA and the transmission convergence (TC) in the ATM trunk processor of the inverse multiplexing over ATM (IMA) method, the configuration of the transmitter and the receiver according to the following.

2 is a diagram showing the structure of a transmitter used in addition to IMA and TC in the ATM trunk processor of the IMA method according to the present invention.

As shown therein, the transmitter in the ATM trunk processor according to the present invention includes a transmit cell processor 110, a filler cell detector 120, a diagnostic cell generator 130, and a transmit controller 140. It is composed.

Looking at the detailed operation of each block through the above configuration as follows.

First, the transmission cell processor 110 simply passes all the IMA cells when it is not in the diagnostic permission state, but processes the removal of the filler cell and insertion of the diagnostic cell in the diagnostic permission state.

Next, the filler cell detector 120 monitors only a transmitting cell with a corresponding link among cells input from the IMA, and notifies each part (PART) in the transmitter if a filler cell is detected.

Next, the diagnostic cell generator 130 is in a diagnostic permission state, and when the detection of the filler cell is notified, the diagnostic cell generator 130 generates a diagnostic cell and outputs the diagnostic cell to the transmission cell processor 140 at a later stage.

Next, the transmission controller 140 performs a reset signal generation function for each part and an operation control function of each part according to whether to permit the diagnosis according to the reset signal from the processor.

3 is a view showing the structure of a receiver used in addition between the IMA and TC in the ATM trunk processor of the IMA method according to the present invention.

As shown in the drawing, the receiver in the ATM trunk processor according to the present invention includes a diagnostic cell detector 210, a reception cell processor 220, a diagnostic cell processor 230, and a reception controller 240.

Looking at the detailed operation of each block through the above configuration as follows.

First, the diagnostic cell detector 210 monitors a cell of a corresponding link among cells received from a TC, and when a diagnostic cell is detected, notifies each part in the receiver and outputs the diagnostic cell to the diagnostic cell processor 230. Do this.

Next, the receiving cell processor 220 performs a function of removing a diagnostic cell and inserting a filler cell at the position to output the IMA.

Next, the diagnostic cell processor 230 monitors the diagnostic cell received together with the diagnostic cell notification to perform various diagnostic functions such as error and statistics, and the result is transmitted to the processor through the reception controller 240. Output

Next, the reception controller 240 performs a reset signal generation function for each part, an output function through a processor interface for a diagnosis result, and a control function for each part according to a reset signal from a processor.

Looking at the IMA link diagnostic method according to the present invention through the above configuration as follows.

4 is a diagram illustrating a processing procedure in a transmitter for diagnosing IMA link according to the present invention.

As shown in the drawing, after the reset signal is input, after initialization (ST11), the step of setting the diagnostic permission setting and the setting of the diagnostic link number (ST12), and after each setting, the step of checking whether the cell is received (ST13) and If there is no cell reception as a result of the confirmation, the cell continues to wait for reception, and if there is a cell reception as a result of the confirmation, checking whether the received cell is a set link (ST14); And returning to the reception step, determining whether the reception cell is a filler cell in the case of the check result setting link (ST15); and if the determination result is not a filler cell, returning to the cell reception step, and In the case of the determination result filler cell, a step (ST16) of checking whether or not the diagnostic permission is allowed and, if the confirmation result is not in the diagnostic permission state, returns to the cell receiving step, and if the verification result is in the diagnostic permission state , A step (ST17) and a step (ST18) for inserting the filler after removing the cells, the cell diagnosis of removing the filler cells.

Looking at the operation of the transmitter according to the present invention as described above in more detail as follows.

First, when a reset signal is input, each part is initialized.

When each part is initialized in the above, the processor sets through the transmission controller 140 whether the diagnostic permission and the diagnosis target link number to each part. Here, whether the diagnostic permission and the link number can be changed by the processor at any time during operation.

If the diagnostic permission and the diagnosis target link number are set in the above, the filler cell detector 120 monitors only cells of the corresponding link among the cells input from the IMA. At this time, when the filler cell is detected, it notifies each part.

Next, the transmitting cell processor 110 confirms the diagnosis permission setting when the filler cell detector 120 is notified of the filler cell detection. At this time, if the diagnostic permission state is not passed through the IMA cell, and if the diagnostic permission state, the filler cell is removed and the diagnostic cell from the diagnostic cell generator 130 is replaced at the position.

The transmitter continues to operate by repeating the above operation.

5 is a diagram illustrating a processing procedure in a receiver for diagnosing IMA link according to the present invention.

As shown in the figure, after the reset signal is input, after initialization (ST21), setting a diagnostic link number (ST22), after setting the link number, checking whether or not a cell is received (ST23), and the checking result If there is no cell reception, the cell reception step is continued. If the cell reception result is found, the mobile station checks a setting link (ST24), and if the check result is not a setting link, returns to the cell reception step. Determining whether the reception cell is a diagnostic cell in the case of a setting link (ST25); and returning to the cell receiving step when the determination result is not the diagnostic cell; and removing the diagnostic cell and diagnosing a cell if the determination result is a diagnostic cell. And a step of inserting a filler cell after delivery to the diagnostic cell processor (ST27).

Looking at the operation of the receiving unit according to the present invention as described above more as follows.

First, when a reset signal is input, each part is initialized.

When each part is initialized in the above, the processor sets a link number for diagnosis to each part through the reception controller 240. At this time, the diagnosis target link number can be changed by the processor at any time during operation.

Next, the diagnostic cell detector 210 monitors only cells of a corresponding link among cells input from the TC and notifies each part when a diagnostic cell is detected.

Next, when the reception cell processor 220 is notified of the detection of the diagnostic cell from the diagnostic cell detector 210, the reception cell processor 220 removes the diagnostic cell, replaces the filler cell with the filler cell, and outputs the generated IMA.

Next, the diagnostic cell processor 230 monitors the diagnostic cell received together with the diagnostic cell detection notification, performs various diagnostic functions such as errors and statistics, and outputs the result to the processor through the reception controller 240.

The receiver continues to operate by repeating the above operation.

The present invention as described above is summarized as follows.

That is, the present invention comprises a transmitting cell processor, a filler cell detector, a diagnostic cell generator, a transmitting unit including a transmission controller, and a diagnostic cell detector, a receiving cell processor, a diagnostic cell processor, and a receiving unit including a receiving controller to diagnose a specific link. Provides this possible IMA link diagnostic device,

In addition, it provides an IMA link diagnostic method that can be added between the IMA unit and the TC unit in the ATM trunk using the IMA to perform a specific link diagnosis by selectively inserting a diagnostic cell only for a specific link.

In addition, the present invention provides an IMA link diagnosis method using a method in which a filler cell from an IMA is replaced with a diagnostic cell and transmitted, and the receiver reversely replaces the diagnostic cell with a filler cell and supplies the same to the IMA.

In addition, the present invention provides a method for diagnosing an IMA link, which enables online diagnosis without loss of an effective data band by replacing a filler cell with a diagnostic cell.

In addition, it is controlled to replace the diagnostic cell to the filler cell in accordance with whether to allow the diagnosis, to provide a method for diagnosing IMA link that can be diagnosed for a specific link that can selectively use the general IMA function and specific functions for diagnosis.

According to the above-mentioned "AMA link diagnosis apparatus and method", the apparatus according to the present invention is added between IMA and Transmission Convergence (TC) to replace the filler cell of the IMA with the diagnostic cell, and to receive the signal. After extracting the cell for diagnosis and delivering it to the diagnosis processing unit, it replaces it with a filler cell and transmits it to IMA, thereby enabling diagnosis of a specific link that was difficult in real time in an ATM trunk operating in IMA mode. Has the advantage of improving.

In addition, due to the application of the diagnostic cell replacement method of the filler cell using the band of the filler cell that is not used as data for diagnosis, there is an advantage that the reduction of the actual effective data bandwidth due to the diagnosis does not occur, and thus a separate diagnostic packet By using the method, there is an advantage that can improve the problems of the existing online diagnosis method that the reduction of the effective data bandwidth occurs.

Claims (4)

In the ATM trunk processor of the inverse multiplexing over ATM (IMA) system, In the case where the diagnosis permit status is not passed through all IMA cells, but when the diagnosis permit status, the transmitting cell processor for removing the filler cell and insertion of the diagnostic cell, A filler cell detector which monitors only a transmitting cell with a corresponding link among cells inputted from the IMA and notifies each part within the transmitting unit if a filler cell is detected; A diagnostic cell generator which performs a function of generating a diagnostic cell and outputting the diagnostic cell to a transmission cell processor 140 at a later stage when the detection of the filler cell is notified; A transmitter configured to include a transmission controller for performing a reset signal generation function for each part and an operation control function for each part according to whether to permit diagnosis according to a reset signal from a processor; A diagnostic cell detector for monitoring a cell of a corresponding link among the cells received from the TC and detecting a diagnostic cell, notifying each part of the receiver and outputting the diagnostic cell; A receiving cell processor which performs a function of removing a diagnostic cell, inserting a filler cell at the position, and outputting the same to the IMA; A diagnostic cell processor that monitors the diagnostic cells received with the diagnostic cell notification and performs various diagnostic functions such as the presence or absence of errors, statistics, and outputs the results to the processor through the reception controller 240; And a receiver configured to include a reset signal generation function for each part according to a reset signal from the processor, an output function through a processor interface for a diagnosis result, and a reception controller for controlling each part. IAM Link Diagnostic Device. In the IMA link diagnostic method, Performing a specific link diagnosis by inserting a diagnostic cell selectively for only a specific link added between the IMA unit and the TC unit in an ATM trunk using the IMA; Transmitting and replacing a filler cell from the IMA with a diagnostic cell at a transmitter, and inversely replacing the diagnostic cell with a filler cell at a receiver and supplying the diagnostic cell; And controlling the replacement of the diagnostic cell to the filler cell according to whether or not the diagnosis is allowed, thereby selectively performing a general IMA function and a function for diagnosis. The method of claim 2, wherein the processing at the transmitter for diagnosing the IMA link comprises: When a reset signal is input and each part is initialized, setting, by the transmission controller, whether or not the diagnosis is permitted and a link number to be diagnosed to each part; A step of notifying, when a filler cell is detected, a filler cell detector monitors only cells of a corresponding link among cells inputted from the IMA when the diagnostic permission and a diagnosis target link number are set; Confirming a diagnostic permission setting when a filler cell detection is notified from the filler cell detector in a transmitting cell processor; If the check result is not the diagnostic permission state, the IMA cell is simply passed through, and if the diagnostic permission state comprises the step of removing the filler cell and replacing the diagnostic cell from the diagnostic cell generator in its position How to diagnose AM link. The method of claim 2, wherein the processing at the receiving unit for diagnosing the IMA link comprises: When the reset signal is input and each part is initialized, setting a diagnosis target link number to each part through a reception controller in the processor; When the diagnosis target link number is set, monitoring a cell of a corresponding link among cells inputted from the TC by a diagnosis cell detector and notifying each part of the case when a diagnosis cell is detected; When the diagnostic cell detector is notified of the detection of the diagnostic cell by the reception cell processor, removing the diagnostic cell, replacing the filler cell, and outputting the filler cell to the IMA; And monitoring the diagnostic cells received with the diagnostic cell detection notification in the diagnostic cell processor to perform various diagnostic functions such as errors and statistics, and outputting the results to the processor through the reception controller. A-link diagnostic method.