KR0153934B1 - Atm layer performance management operation and maintenance cell processing apparatus - Google Patents

Abstract

The present invention relates to a layer performance management operation and maintenance (OAM) cell processing apparatus of the asynchronous delivery mode (ATM), which receives and outputs a BIP-16 value, a CLP value of a user cell header, a connection identifier, and forward monitoring information. Forward monitoring information selecting means (51) for outputting a selection signal; Common forward monitoring information processing means (52) for receiving the output of the forward monitoring information selecting means (51) and accumulated data and updating and outputting the accumulated data; The data stored by the forward monitoring information selection signal of the forward monitoring information selecting means 51 is output to the common forward monitoring information processing means 52, and new data processed by the common forward monitoring information processing means 52 is output. Forward monitoring information storage means (53) for storing; Performance management that outputs the forward monitoring information selection signal, reverse report information register selection signal, performance accumulation processing activation signal, and performance accumulation information selection signal by receiving the channel identifier value of the received performance management cell and comparing it with the stored channel identifier value. Cell channel comparison means 54; Common performance management cell information processing means (55) for constructing and outputting a reverse report cell; Common performance management performance accumulation information processing means 56 for performing a common function of performing a common function of the performance accumulation operation; Reverse report retrieval means (57) for storing and outputting reverse report cell information; Performance management performance accumulation information storage means (58) for storing performance accumulation information and generating an interrupter by comparing the performance value accumulated for each connection and the performance management performance accumulation threshold value; And a CPU setting register (59) for storing the setting data of the CPU, and performs a real-time processing of the performance management cell among the ATM layer OAM cells of the F4 / F5 level applied to the UNI / NNI. Quality of service by accumulating real-time performance information such as the number of receive performance management blocks, error received blocks, transient error received blocks, lost cells, incorrectly inserted cells, discarded cells, CLP tagged cells, and total received cells And network parameters.

Description

ATM layer performance management operation and maintenance (OAM) cell processing unit

1 is a schematic block diagram of a reception management cell processing apparatus to which the present invention is applied;

2 is a block diagram of a performance management cell processing unit according to an embodiment of the present invention.

* Explanation of symbols for main parts of the drawings

51: forward monitoring information selection unit 52: common forward monitoring information processing unit

53: forward monitoring information storage unit 54: performance management cell channel comparison unit

55: common performance management cell information processing unit

56: common performance management performance cumulative information processing unit

57: backward reporting information storage 58: performance management performance cumulative information storage

59: CPU setting register

The present invention relates to an asynchronous delivery mode (ATM) layer performance management operation and maintenance (OAM) cell processing apparatus.

At present, various communication network technologies for providing broadband integrated information network (B-ISDN) service are actively developed in various countries. Among these communication network technologies, fault management and performance management through operation and maintenance (OAM) cell processing of ATM layer must be developed in advance for the management of broadband integrated information communication network. As one of the items, the standardization is actively underway internationally.

Accordingly, the present invention is a total reception performance management block for a specific connection on the ATM virtual connection by real-time processing the performance management cell of the ATM layer OAM cells of the F4 / F5 level applied to the user network interface and network node interface (UNI / NNI) Quality of service and network parameters by accumulating real-time performance information such as number of blocks received, number of received blocks received error, number of received blocks received excessive error, number of lost cells, number of misinserted cells, number of discarded cells, number of CLP tagged cells, number of total received cells An object of the present invention is to provide an ATM layer performance management OAM cell processing apparatus capable of measuring.

According to an aspect of the present invention, there is provided a monitoring apparatus for selecting a BIP-16 value, a CLP value of a user cell header, and a connection identifier from a receiving user cell monitoring unit, and outputting a forward monitoring information selection signal; The BIP-16 value of the user cell and the CLP value of the user cell header are input from the forward monitoring information selecting means, and the accumulated RX_CELL 0 + 1 value, RX_CELL 0 value, and performance management block unit are stored for the stored user cells. Common forward monitoring information processing means for receiving the accumulated BIP-16 value for the received user cell and updating and outputting the BIP-16 value; The RX_CELL 0 + 1 value, the RX_CELL 0 value, and the accumulated BIP-16 value for the user cell stored by the forward monitoring information selection signal of the forward monitoring information selecting means are output to the common forward monitoring information processing means, and the common forward monitoring is performed. Forward monitoring information storage means for storing new RX_CELL 0 + 1 values, RX_CELL 0 values, cumulative, BIP-16 values processed by the information processing means; The performance management cell received by receiving the performance management cell and channel identifier values from the OAM cell separation unit and the receiving user cell monitoring unit, receiving the stored channel identifier value and the activated channel identifier value, and comparing them with respect to the active connection. This forward monitoring cell outputs a forward monitoring information selection signal to the forward monitoring information storage means using a connection identifier obtained from the comparison result, and activates / deactivates a signal for activating or deactivating a reverse monitoring information selection signal and an operation. A performance management cell channel comparison means for outputting a performance management cell and outputting a performance accumulation information selection signal using a connection identifier obtained from a comparison result when the received performance management cell is a reverse reporting cell or a forward monitoring cell to perform performance accumulation; When the forward monitoring performance management cell is received, the reverse reporting cell is configured and output using the received information and data input from the forward monitoring information storage means, and the CLP value transmitted through the forward monitoring cell is' 0 'or' The total number of user cells (TUC0 + 1) for the transmitting user cell with 1 ', the value for resetting the total number of user cells (TUC0) and the BIP-16 value for the transmitting user cell with the CLP value of' 0 'to 0. Common performance management cell information processing means for outputting to the forward monitoring information storage unit and outputting information extracted from the reverse reporting cell when a reverse reporting performance management cell is received; Receives an activation signal from the performance management cell channel comparison means and starts operation to receive performance related cell information transmitted from the common performance management cell information processing means and information corresponding to the connection identifier of the stored reception performance management cell. Common performance management performance accumulation information processing means for updating the information to output related information; Reverse report information storing means for storing reverse report cell information transmitted from the common performance management cell information processing means in a reverse report information register selected by a reverse monitoring information selection signal of the performance management cell channel comparison means; Information input from the common performance management performance accumulation information processing means is stored in a register selected by the performance accumulation information selection signal of the performance management cell channel comparison means, and the accumulated performance value and performance management performance accumulation threshold value for each connection are stored. A performance management performance accumulation information storage means for generating an interrupter to the CPU when the performance information above the threshold is accumulated in comparison; And a reference value of the number of missing cells and misinserted cells for declaring the threshold value and the number of excessive error cell blocks for performance accumulation information, and a reference value of the number of error cells for declaring the number of transient error cell blocks and a number for performing performance management. Channel recognizer (VPI / VCI) and enable / disable function of performance management function for a specific connection, forward monitoring performance management function of a specific connection, enable / disable function of performance management function for a cell, the performance management performance accumulation information storage means And a CPU setting register means for performing a function of activating / deactivating initialization of a performance accumulation information register corresponding to a specific connection in the system.

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

1 is a schematic block diagram of a reception operation management cell processing apparatus according to an embodiment of the present invention, in which 1 is a receiving user cell monitoring unit, 2 is a CRC inspection unit, 3 is an OAM cell separation unit, and 4 is a failure. Management cell processing unit, 5 is a performance management cell processing unit, 6 is a meta-signal cell processing unit, 7 is an active / inactive cell processing unit, 8 is a resource management cell processing unit, 9 is a system management cell processing unit, 10 is an OAM cell memory, 11 is a CPU connection unit Respectively.

The receiving user cell monitoring unit 1 extracts a channel identifier (VPI / VCI) from the header of the received user cell and sends it to the alarm cell processing unit 20 and the continuity check cell processing unit 30 of the failure management cell processing unit 4. If a user cell corresponding to a specific connection is received from the forward monitoring cell processing unit 50 of the performance management cell processing unit 5 by referring to the currently activated forward monitoring channel identifier (VPI / VCI), the corresponding user cell is received. The BIP-16 value for the payload of the cell header, the cell loss priority (CLP) value of the cell header, and the connection identifier are extracted and transmitted to the forward monitoring cell processing unit 50.

Here, the connection identifier is a self identifier value mapped to the channel identifier (VPI / VCI) value of the received user cell header. Only the connection identifier value equal to the number of connections processed by the forward monitoring cell processing unit 50 recognizes the reception channel. Used to map to a child (VPI / VCI) value.

When monitoring the receiving user cell, only the specific part of the cell header is used by using the criteria of whether the receiving user cell monitoring unit 1 is applied to UNI or NNI and which level of FAM level or F5 level. Filter by monitoring.

The CRC inspection unit 2 is mainly composed of a CRC-10 inspection unit, a CRC-32 inspection unit, and a CRC error accumulation unit, and outputs the CRC inspection unit to the OAM cell separator 3 after the CRC inspection. Here, the CRC-10 checker provides a function of discarding the cell when a CRC error occurs after the CRC-10 check of the OAM cell, and the CRC-32 checker performs a CRC-32 check of the meta signal cell and then a CRC error occurs. Discard the cell if it is. For CRC-10, the test is performed when the product polynomial is

For CRC-32, the test is performed when the generated polynomial is

The CRC error accumulator accumulates CRC errors and transfers them to the CPU when a predetermined threshold value is exceeded. Optionally, the CRC checker 2 may process all the received cells as valid cells without performing the CRC check.

The OAM cell separator 3 separates various OAM cells with reference to only OAM types and function types of OAM cells received from the CRC checker 2 and transmits them to the corresponding processing units. The types of OAM cells that are separated from the OAM type and function types are AIS / RDI cell, continuity test cell, and loopback cell among the fault management cells, and the forward monitoring cell and reverse reporting cell among the performance management cells, and the performance management among the active / inactive cells. Active / inactive, continuity test There are active / inactive cells. A type of OAM cell that separates only OAM types is a system management cell. A type of OAM cell that separates only PTI values of a received OAM cell header is a resource management cell.

The OAM cell separator 3 extracts a channel identifier (VPI / VCI) from the header information of the received OAM cell and delivers it to each OAM cell processor.

In the case of the meta signal cell, a structure that is already classified and transmitted in a separate functional block (eg, a receiving cell header processing unit) is considered. Therefore, a separate cell discrimination identifier is transmitted to the report metasignal cell processor.

In the case of cells other than the above-described separation cells among the cells transmitted to the OAM cell separation unit 3, the CRC inspection unit 2 performs only the CRC-10 inspection and stores the received cells in the OAM cell memory 10, and the CPU connection unit. (11) is passed to the CPU. This function can be used for processing applications of OAM cells to be standardized in the future without requiring real-time processing.

The meta-signal cell processing unit 6 stores the meta-signal cell transferred from the OAM cell separator 3 in the OAM cell memory 10 without any additional processing.

The active / inactive cell processing unit 7 stores the active / inactive cell delivered from the OAM cell separator 3 in the OAM cell memory 10 without any additional processing.

The resource management cell processing unit 8 stores the resource management cell delivered from the OAM cell separation unit 3 in the OAM cell memory 10 without additional processing.

The system management cell processing unit 9 stores the system management cell delivered from the OAM cell separation unit 3 in the OAM cell memory 10 without additional processing.

The OAM cell memory 10 stores data in units of cells and transmits the data to the CPU through the CPU connection unit 11. The OAM cell memory 10 can actually store a plurality of OAM cells, but is configured to look like one cell memory on the memory map of the CPU. The OAM cell memory 10 assumes that the CPU has completed reading when the CPU reads the last address on the memory map. The OAM cell memory 10 generates an interrupt capable of distinguishing the type of OAM cell to be delivered to the current CPU when the OAM cell is stored. When one or more OAM cells are stored, the OAM cell memory 10 does not generate an interrupt corresponding to a cell to be delivered next in sequence, and a new interrupt must be generated after the CPU completes reading of the OAM cell in advance. . The OAM cell memory 10 manages the sequence number for each area of its own cell memory and maps the cell memory to be read by the CPU into the OAM cell memory map.

Using this structure, the CPU reduces the memory map and at the same time the CPU receives only the information according to the type of cell to be read and then indicates that the read is complete to provide an area for receiving new cells. 10) can also increase the efficiency.

The future management cell processing unit 4 includes an alarm cell processing unit 20, a continuity check cell processing unit 30, and a loopback cell processing unit 40.

The alarm cell processing unit 20 receives a channel identifier (VPI / VCI) of the receiving user cell from the receiving user cell monitoring unit 1, and receives the channel identifier of the continuity check cell received from the OAM cell separator 3. When receiving an AIS cell for the first time on a specific connection from the OAM cell separation unit 3 while receiving the VPI / VCI), the AIS state is stored while storing the channel identifier (VPI / VCI) of the cell in the internal memory. Declare and immediately release the AIS state if no AIS cell is received on the connection for a certain time or if any valid cell (user cell, continuity check cell) is received. Declares the RDI state while storing the channel identifier (VPI / VCI) of the cell in the internal memory and releases the RDI state when the RDI cell is not received on the connection for a certain time. The default alarm is 3 seconds, but the alarm release time can be set to a value other than this value.

The continuity check cell processing unit 30 receives a channel identifier (VPI / VCI) of the user cell received from the receiving user cell monitoring unit 1, and recognizes the channel of the continuity check cell received from the OAM cell separator 3. When the continuity check cell check function is activated for a specific connection by receiving a rule (VPI / VCI), it provides a function to determine whether a user cell or a continuity check cell is received within a predetermined time for a certain time. The continuity check alarm state declaration time is configured to set the default value as 3.5 seconds or a value other than this value.

The loopback cell processing unit 40 receives the loopback cell from the OAM cell management unit 3, provides a function of checking the source identifier and the loopback position identifier, and optionally also disables this function. If the loopback display value of the received loopback cell is '0', the entire information of the received cell is transmitted to the OAM cell memory 10 so that related information is transmitted to the CPU. If the loopback display value is '1', the loopback display is After setting the value to '0', the relevant information can be stored in its internal cell buffer and looped back without CPU intervention.Also, the relevant information is passed to the OAM cell memory 10 without changing the loopback display value. Through software processing through.

When the performance management cell processing unit 5 receives the forward supervisory cell from the OAM cell separation unit 3, the forward supervisory cell processing unit 50 generates a reverse report cell, outputs it to the transmitting OAM processing unit, and receives the reverse report cell. In one case, the reverse report cell processor 60 extracts and accumulates the performance information from the corresponding cell, and outputs the accumulated performance information to the CPU through the CPU connection unit 11. The forward monitoring cell processing unit 50 also extracts and accumulates performance information from the reverse report cell generated by the forward monitoring cell processing unit 50 and outputs the accumulated performance information to the CPU through the CPU connection unit 11.

2 is a configuration diagram of the performance management cell processing unit 5 according to an embodiment of the present invention, in which 51 is a forward monitoring information selection unit, 52 is a common forward monitoring information processing unit, 53 is a forward monitoring information storage unit, 54 Is a performance management cell channel comparison unit, 55 is a common performance management cell information processing unit, 56 is a common performance management performance cumulative information processing unit, 57 is a reverse report information storage unit, 58 is a performance management performance cumulative information storage unit, 59 is a CPU setting register Each part is shown.

The forward monitoring information selecting unit 51 receives the BIP-16 value, the CLP value of the user cell header and the connection identifier from the receiving user cell monitoring unit 1, and the BIP-16 value and the CLP value of the user cell header are common forward monitoring. It forwards to the information processing unit 52, and outputs the forward monitoring information selection signal to the forward monitoring information storage unit 53 using the connection identifier value, the RX_CELL 0 + 1 value, the RX_CELL 0 value and the performance management block corresponding to this value. The accumulated BIP-16 values for the user cells received in units are output to the common forward monitoring information processing unit 52.

Here, the connection identifier is a self identifier value mapped to a channel identifier (VPI-VCI) value of the received user cell header, and only a connection identifier value equal to the number of connections distinguished by the performance management cell channel register 103 is received. Used to map to channel identifier values.

The common forward monitoring information processing unit 52 performs the BIP-16 value of the user cell, the CLP value of the user cell header, and the user cell received so far from the forward monitoring information storage unit 53 from the forward monitoring information selecting unit 51. Provides a function to receive and process the accumulated RX_CELL 0 + 1 value, the RX-CELL 0 value, and the accumulated BIP-16 value for the received user cell in the performance management block unit. The newly stored RX_CELL 0 + 1 value is incremented by 1 unconditionally when receiving the user cell regardless of the CLP value of the receiving user cell, and RX_CELL 0 is incremented by 1 only when the CLP value of the receiving user cell is '0'. It operates as a modulo 65536. The newly stored BIP-16 value is obtained by taking the best parity between the BIP-16 value and the stored BIP-16 value of the user cell.

The forward monitoring information storage unit 53 stores the RX_CELL 0 + 1 value, the RX_CELL 0 value, and the accumulated BIP-16 value for the user cell monitoring the forward direction selected by the forward monitoring information selection signal of the forward monitoring information selection unit 51. It extracts and transfers it to the common forward monitoring information processing unit 52, and provides a function of storing the new RX_CELL 0 + 1 value, the RX_CELL 0 value, and the accumulated BIP-16 value processed by the common forward monitoring information processing unit 52.

The performance management cell channel comparator 54 receives the channel identifier value of the current management cell received from the OAM cell separation unit 3 and compares the channel identifier value from the performance management cell channel registration unit 103. It performs the function. The channel identifier comparison is performed only for the connection enabled in the performance management control register 104. The OAM of the F4 level or the F5 level and the level where the management cell processing unit 5 is applied to the UNI or NNI are applied. The comparison check is performed by filtering only a specific part of the cell header using the criteria of whether the processing is performed.

When the received performance management cell is the forward monitoring cell, the performance management cell channel comparator 54 outputs the forward monitoring information selection signal to the forward monitoring information storage unit 53 using the connection identifier obtained from the comparison result, and monitors the forward monitoring. The RX_CELL 0 + 1 value, the RX_CELL 0 value, and the accumulated BIP-16 value corresponding to the connection identifiers stored in the information storage unit 53 are selected and transmitted to the common performance management cell information processing unit 55. Forward monitoring information such that the new RX_CELL 0 + 1, RX_CELL 0 value, and BIP-16 value, which are the result values processed by the management cell information processing unit 55, are stored in the area corresponding to the connection identifier in the forward monitoring information storage unit 53. The selection signal is output to the forward monitoring information storage unit 53.

In addition, the reverse monitoring information selection signal is reversed to store the reverse report cell information obtained from the forward monitoring performance management cell in the common performance management cell information processing unit 55 in an area corresponding to the connection identifier in the reverse reporting information storage unit 57. Output to the report information storage unit 57.

In addition, if the received performance management cell is a reverse report cell or a forward monitoring cell to accumulate performance, the operation of the common performance management performance accumulation information processing unit 56 is activated, and otherwise, a function of deactivation is provided. If the received performance management cell is a reverse report cell or a forward monitoring cell to accumulate performance, the performance management cell channel comparator 54 uses the connection identifier obtained from the comparison result to perform performance management information accumulation signal. Outputs to the storage unit 58 to select the accumulated performance-related information corresponding to the connection identifier of the performance management performance cumulative information storage unit 58 to be delivered to the common performance management performance cumulative information processing unit 56, and also common The performance management result accumulated by the performance management information accumulating information processing unit 56 is stored in the area corresponding to the connection identifier in the performance management performance accumulation information storage unit 58.

The performance management cell channel comparator 54 receives the performance accumulation status of the forward monitoring cell through the performance management control register 104.

The common performance management cell information processing unit 55 has a 32-bit timer that operates in units of 1 uSec and provides a function of configuring a reverse report cell when a forward monitoring performance management cell is received. The process is as follows.

The common performance management cell information processing unit 55 is a forward monitoring cell sequence number (MCSN), which is information transmitted when a forward monitoring performance management cell is received, and total users for the transmitting user cell having a CLP value of '0' or '1'. Number of cells (TUCO + 1), total number of user cells (TUCO) for the transmitting user cell whose CLP value is '0', forward BIP-16 value and RX_CELL 0 + 1 value received from forward monitoring information storage 53 , Total number of user cells (TUCO + 1) for outgoing user cells with CLP value '0' or '1' in the reverse report cell area using RX_CELL 0 value and cumulative BIP-16 value, and CLP value '0' Total number of user cells (TUCO) for outgoing user cells, total number of user cells (TRCCO + 1) for incoming user cells with a CLP value of '0' or '1', block error result (BLER 0 + 1), A total number of user cells (TRCC0) for a receiving user cell having a CLP value of '0' is configured. The reverse supervisory cell sequence number (MCSN) field of the reverse report cell is coded using a modulo 65536 counter that increments by one each time a reverse cell is generated, and the time stamp (TSTP) area is used when the reverse cell is transmitted. Code and pass your own timer value. Through this process, the reverse report cell is configured and then transmitted to the reverse report information storage unit 57.

The common performance management cell information processing unit 55 transfers information for performance accumulation to the common performance management performance accumulation information processing unit 56 when the performance accumulation for the forward monitoring performance management cell is activated in the performance management control register 104. do. At this time, the transmitted information includes the total number of user cells for the transmitting user cell having the CSN value '0' or '1' obtained from the forward supervisory cell sequence number (MCSN) obtained from the forward performance management cell and the configured backward performance management cell. (TUC0 + 1), the total number of user cells for a transmitting user cell with a CLP value of '0' (TUC0) The total number of user cells for a receiving user cell with a CLP value of '0' or '1' (TRCC0 + 1), As a result of the block error (BLER0 + 1), there is a total number of user cells (TRCC0) for a receiving user cell whose CLP value is '0'. Through this function, it is possible to efficiently use the limited internal performance accumulation area by performing selective performance accumulation on the forward monitoring performance management cell.

As such, the information configured when the common performance management cell information processing unit 55 receives the forward monitoring performance management cell includes a reverse supervisory cell sequence number (MCSN) and a total number of transmitting user cells having a CLP value of '0' or '1'. Number of user cells (TUC0 + 1), total number of user cells (TUC0) for the sending user cell with a CLP value of '0', time stamp value (TSTP), and receiving user cells with a CLP value of '0' or '1'. The total number of user cells (TUCC0 + 1), the block error result (BLER 0 + 1), and the total number of user cells (TUCC0) for a receiving user cell whose CLP value is '0'. The notation for each information area and the definition and processing for each area follow I.610 of ITU_T.

The common performance management cell information processing unit 55 transmits the TUC0 + 1 and TUC0 values transmitted through the monitoring cell to the forward monitoring information storage unit 53 when the forward monitoring performance management cell is received. RX_CELL0 + 1 corresponding to the connection identifier replaces TUC0 + 1, RX_CELL0 with TUCO, and resets the BIP-16 value to zero. That is, the BIP-16 value generated in the performance management block unit is initialized to 0 each time the forward monitoring cell is received, and the RX_CELL0 + 1 and RX_CELL0 values are replaced with the TUC0 + 1 and TUC0 values of the received forward monitoring performance management cell. Enables forward user cell monitoring on a block-by-block basis.

The common performance management cell information processing unit 55 receives a reverse monitoring cell sequence number (MCSN), which is information extracted from the reverse reporting cell when the reverse reporting performance management cell is received, and a transmitting user cell having a CLP value of '0' or '1'. Total number of user cells (TUC0 + 1) for, total number of user cells (TUC0), time stamp (TSTP) for transmitting user cells with CLP value of '0', and receive with CLP value of '0' or '1' Performance management performance after extracting the total number of user cells (TRCC0 + 1), the block error result (BLER0 + 1), and the total number of user cells (TRCC0) for the receiving user cell whose CLP value is '0'. It provides a function to transfer to the information storage unit 58.

In addition, the common performance management cell information processing unit 55 includes a 32-bit timer that operates in units of 1 uSec, so that the performance management performance accumulation information storage unit 58 stores reverse performance accumulation information obtained from the forward monitoring performance monitoring cell and the reverse monitoring cell. It also provides the ability to optionally pass this information to the CPU. At this time, the common performance management cell information processing unit 55 also extracts the value of its own 32-bit timer and transfers the value to the CPU. In this way, the CPU forwarding function can be used to provide performance information such as cell delay variation (CDV) and software performance accumulation.

The common performance management performance accumulation information processor 56 operates only when receiving an activation signal from the performance management cell channel comparator 54. When activated, the common performance management performance accumulation information processing unit 56 recognizes the connection of the performance management cell information related to performance-related cell information transmitted from the common performance management cell information processing unit 55 and the performance management performance accumulation information storage unit 58. After receiving the information corresponding to the update of the performance cumulative and provides the function to deliver the resulting information to the performance management performance cumulative information storage unit (58).

In this case, the performance-related cell information transmitted from the common performance management cell information processing unit 55 includes a forward / reverse monitoring cell sequence number (MCSN) and a total number of user cells for a transmitting user cell having a CLP value of '0' or '1'. (TUC0 + 1), the total number of user cells for the transmitting user cell with CLP value '0' (TUC0), the total number of user cells for the receiving user cell with CLP value '0' or '1' (TRCC0 + 1), there is a block error result (BLER0 + 1), the total number of user cells (TRCC0) for a receiving user cell whose CLP value is '0'.

Performance management The information transmitted from the performance accumulation information storage unit 58 includes a forward / reverse monitoring cell sequence number (MCSN) and a total number of user cells (TUC0 +) for a transmitting user cell having a CLP value of '0' or '1'. 1) There is a total number of user cells (TUC0) for a transmitting user cell whose CLP value is '0'. These values are the information extracted from the performance management OAM cell passed just before on the connection. Performance Management The information accumulated from the performance accumulation information storage unit 58 is 11 kinds of performance accumulation information accumulated for the connection until recently.

The common performance management performance accumulation information processing unit 56 calculates the absolute number of cell blocks transferred between two successive performance management OAM cells using two forward / reverse supervisory cell sequence number (MCSN) values.

The common performance management performance cumulative information processing unit 56 compares two total user cell (TUC0 + 1) values for the transmitting user cell having the CLP value of '0' or '1' to compare the two performance management OAM cells. Calculate the absolute value of the number of user cells whose CLP value is '0' or '1' delivered by the sender, and the total number of user cells (TRCCO + 1) for the receiving user cell whose CLP value is '0' or '1' The CLP value received by the receiver between two successive OAM cells by comparing the value of the total number of user cells (TUC0 + 1) for the transmitting user cell whose CLP value is 0 or 1 The user with this '0' or '1' calculates the absolute value of the number of cells. The common performance management performance cumulative information processing unit 56 compares these two values, and then the absolute lost cell / misinserted cell of the user cell whose CLP value is '0' or '1' generated between two successive performance management OAM cells. Calculate the number.

The common performance management performance accumulation information processing unit 56 compares two values of the total number of user cells (TUC0) for the transmitting user cell having the CLP value of 0, and the CLP value transmitted by the sender between two successive performance management OAM cells is determined. Calculates the absolute value of the number of user cells with '0', the total number of user cells (TUC0) for the total user cells for the receiving user cell with a CLP value of '0' and the CLP value of the previous arrival performance management cell is '0' By comparing the value of the total number of user cells (TUC0) for the inbound user cell, the absolute value of the number of user cells whose CLP value is '0' is transmitted between two successive OAM cells. The common performance management performance accumulation information processor 56 calculates an absolute number of lost cells / inserted cells of a user cell having a CLP value of '0' between two successive performance management OAM cells by comparing these two values.

The common performance management performance cumulative information processing unit 56 is an absolute number of lost cells / misinserted cells of user cells having the CLP value of '0' or '1' and an absolute lost cell of the user cells having a CLP value of '0' /. Using the number of incorrectly inserted cells, the number of discarded or tagged cells for a user cell having a zero CLP value generated between two successive OAM cells is obtained.

The common performance management performance accumulation information processing unit 56 determines the number of BIP-16 errors generated between two successive performance management OAM cells using the block error result (BLER0 + 1). Common performance management The performance accumulation information obtained by the performance accumulation information processing unit 56 includes the number of monitored cell blocks (MBN), error cell blocks (ECB), transient error cell blocks (SECB), and transient error cell blocks. Error count (SECB_E), transient error cell block_injection count (SECB_M), lost cell count (CL), total lost cell count (TCL), incorrect insert cell count (CM), discard cell count (DISC), tagging cell Number (TAG), total number of user cells (PUC), and so on.

-Number of monitored cell blocks: 16-bit counter that accumulates the number of performance management blocks transmitted by the sender using the monitoring cell sequence number delivered from processing of the received forward monitoring reverse / direction reporting performance management cell. Is 'FF00' in hexadecimal and can be set to any value. This value is obtained by accumulating the absolute number of cell blocks passed between two receiving OAM cells following the previous performance accumulation value.

-Number of block of error cell: 8-bit counter that increments by '1' when BIP-16 error is more than '1' or one or more missing cells or misinserted cells. The default value of threshold is 'FF' in hexadecimal. Can be set to any value. This value is the absolute number of lost or misinserted cells in a user cell with a CLP value of '0' or '1' greater than or equal to '1', or if the number of BIP-16 errors between two successive OAM cells is greater than or equal to '1'. Obtained by increasing the previous cumulative value by '1'.

-Number of transient error cell blocks: 8-bit counter that increments by '1' when more than M BIP-16 errors or more than K missing / inserted cells occur. The default value of the threshold is 'FF' in hexadecimal. Can be set to any value. The default value of M is 4 and can be set up to 16. The default value of K is 2 and can be set up to 16. The register for storing the corresponding information is the transient error cell block declaration reference register 102.

-Transient error cell block_error number: 8 bit counter that increments by '1' when more than M BIP-16 errors occur. The default value of threshold is 'FF' in hexadecimal and can be set to any value. The default value of M is 4 and can be set up to 16. The register for storing the corresponding information is the transient error cell block _ loss / misinsertion declaration reference register 101. If the number of BIP-16 errors between two successive OAM cells is greater than or equal to M, the previous cumulative value is increased by '1'.

-Transient error cell block_incorrect number: 8-bit counter that increments by '1' when more than 5 incorrectly inserted cells occur. The default value of threshold is 'FF' in hexadecimal and can be set to any value. The default value of K is 2 and can be set up to 16. This value is obtained by increasing the previous short-circuit value by '1' when the absolute misinsertion number of user cells whose CLP value is '0' or '1' is greater than or equal to K.

-Number of lost cells: 16-bit counter that accumulates these cells when there are less than K lost cells. The default value of the threshold is 'FF00' in hexadecimal and can be set to any value. The default value of K is 2 and can be set up to invitation 16. This value is obtained by increasing the previous cumulative value by '1' when the absolute number of lost cells of the user cell whose CLP value is '0' or '1' is less than K.

Total number of lost cells: 16-bit counter that accumulates these cells when lost cells occur. The default value of the threshold is 'FF00' in hexadecimal and can be set to any value. This value is obtained by accumulating the absolute number of lost cells of the user cell whose CLP value is '0' or '1' to the previous cumulative value.

-Number of incorrectly inserted cells: 16-bit counter that accumulates these cells when there are less than five incorrectly inserted cells. The default value of the threshold is 'FF00' in hexadecimal and can be set to any value. The default value of K is 2 and can be set up to 16. This value is obtained by accumulating the absolute number of incorrectly inserted cells of the user cell whose CLP value is '0' or '1' to the previous cumulative value.

-Number of discarded cells: 16 bits that accumulate the discarded number of cells having a CLP value of '0' from the values of TUC0 + 1, TUC0, TRCC0, and TRCC0 + 1 delivered from the processing of the received forward monitoring / reverse reporting performance management cells. The default value of the threshold as a counter is 'FF00' in hexadecimal and can be set to any value. This value is obtained by accumulating the number of discarded cells for the user cell whose CLP value is '0' to the previous cumulative value.

-Number of tagging cells: 16 bits that accumulate the number of tagged cells with the CLP value of '0' from TUCO + 1, TUC0, TRCC0, TRCC0 + 1 values transmitted from processing of received forward monitoring / reverse reporting performance management cells. The default value of the threshold as a counter is 'FF00' in hexadecimal and can be set to any value. This value is obtained by accumulating the number of tagged cells for the user cell whose CLP value is '0' to the previous cumulative value.

-Total number of processed user cells: 24-bit counter that accumulates user cells in the block delivered by the sender using the TUC0 + 1 value delivered from the processing of the received forward monitoring / reverse reporting performance management cell. The default value of the threshold is 16. 'FF0000' in decimal, which can be set to any value. This value is obtained by accumulating the absolute value of the number of user cells whose CLP value transmitted by the sender is '0' or '1' to the previous cumulative value.

Among the above performance information, the number of error-occurring cell blocks (ECB), the number of transient error cell blocks (SECB), the number of excessive error cell blocks_errors (SECB_E), the number of excessive error cell blocks_inserted errors (SECB_M), the number of lost cells ( CL), total lost cells (TCL), incorrectly inserted cells (CM), discarded cells (DISC), tagged cells (TAG), and total processed user cells (PUC) are T1S1.5, the US national standardization body. Follow the definition given in / 94-004 R1.

The reverse report information storage unit 57 stores a reverse supervisory cell sequence number (MCSN), which is reverse report cell information transmitted from the common performance management cell information processor 55, and a transmitting user cell having a CLP value of '0' or '1'. Total User Cells (TUC0 + 1), Total User Cells (TUC0), Time Stamp (TSTP) for Sending User Cells with CLP Value '0', Receive User Cells with CLP Value '0' or '1' Total number of user cells for TSTP, total number of user cells for the receiving user cell with CLP value of '0' or '1' (TRCC0 + 1), block error result (BLER0 + 1), CLP value of '0' Information of the total number of user cells TRCC0 for the received user cell is stored in the backward report information register selected by the backward monitoring information selection signal of the performance management cell channel comparator 54. The reverse report information storage unit 57 provides a function of forwardly transmitting the cell through the reverse report cell information data bus at a suitable time when the reverse report performance management cell is stored for a particular connection.

The performance management performance accumulation information storage unit 58 provides a performance accumulation information register function for as many channels as the number of channels of the performance management cell channel registration unit 103. The performance management performance accumulation information storage unit 58 is a forwarding / reverse monitoring cell sequence number (MCSN), which is information transmitted from the common performance management performance accumulation information processing unit 56, and a transmitting user whose CLP value is '0' or '1'. Comparing the total number of user cells (TUC0 + 1) for the cell, the number of user cells (TUC0) for the transmitting user cell having the CLP value of '0', and 11 newly accumulated performance information, the performance management cell channel comparison unit 54 It provides a function for storing in the performance management performance cumulative information register 105 selected by the performance cumulative information selection signal of " In addition, the performance accumulation threshold comparison unit 106 of the performance management performance accumulation information storage unit 58 compares the performance value accumulated for each connection with the value of the performance management performance accumulation threshold register 100 to accumulate performance information above the threshold. In this case, an interrupter is generated by the CPU so that the CPU can read the corresponding performance information. After reading the performance information on the specific connection, the CPU may initialize 11 performance accumulation information on the connection of the performance management performance accumulation information storage unit 58 through the performance management control register 104. In this way, the cumulative information exceeds the maximum limit of the performance management performance accumulation information register 105, so that the performance accumulation information can be prevented in advance.

Even when the performance management performance accumulation information register 105 is initialized, the total number of user cells (TUC0 + 1) for a forwarding / reverse monitoring cell sequence number (MCSN) and a transmitting user cell having a CLP value of '0' or '1'. ), Information values of the total number of user cells (TUC0) for a transmitting user cell having a CLP value of '0' are kept as they are to calculate 11 performance accumulation information from the newly arrived performance accumulating cells.

Performance Management The performance accumulation threshold register 100 stores threshold values for 11 performance accumulation information, and the CPU may set a value other than the default value. The threshold value for each performance information is as follows.

The default value of the monitored cell block threshold is 'FF00' in hexadecimal and can be set to any value from '0000' to 'FFFF'. The default value of the threshold number of error cell blocks is 'FF' in hexadecimal and can be set to any value from '00' to 'FF'. The threshold default value of the transient error cell block number is 'FF' in hexadecimal and can be set to any value from '00' to 'FF'. The default value of the transient error cell block_error number is 'FF' in hexadecimal and can be set to any value from '00' to 'FF'. The default value of the transient error cell block_insert number is FF in hexadecimal and can be set to any value from '00' to 'FF'. The default value of the lost cell number is 'FF00' in hexadecimal and can be set to any value from '00' to 'FF'. The threshold value of the total number of lost cells is 'FF00' in hexadecimal and can be set to any value from '0000' to 'FFFF'. The threshold value of the number of incorrectly inserted cells is 'FF00' in hexadecimal and can be set to any value from '0000' to 'FFFF'. The default value of the discarded cell number is 'FF00' in hexadecimal and can be set to any value from '0000' to 'FFFF'. The threshold value of the number of tagged cells is 'FF00' in hexadecimal and can be set to any value from '0000' to 'FFFF'. The threshold value of the total number of processed user cells is 'FF0000' in hexadecimal and can be set to any value from '000000' to 'FFFFFF'.

Transient error cell block_Lost / Insert Declaration Criteria register 101 is a register for setting the K value, which is a reference value of the number of lost and misinserted cells, for declaring the number of transient error cell blocks among 11 performance information items. The value is 2 and can be set up to 16.

The transient error cell block_error declaration reference register 102 is a register for setting M value, which is a reference value of the number of error cells for declaring the number of transient error cell blocks, among 11 performance information items. The default value is 4 and is set up to 16. It is possible.

The performance management cell channel register 103 is composed of arbitrary N registers and provides a function of storing a plurality of channel identifiers (VPI / VCI) for performing performance management. The performance management control register 104 may enable / disable a performance management function for a specific connection in the performance management cell channel register 103, enable / disable function of a performance management function for a forward monitoring performance management cell of a specific connection, and performance. A register that performs a function of activating / deactivating initialization of a performance management performance accumulation information register corresponding to a specific connection in the management performance accumulation information storage unit 58.

The present invention configured and operated as described above performs real-time processing of the performance management cell among ATM layer OAM cells of the F4 / F5 level applied to UNI / NNI. Service quality and network parameters can be measured by accumulating real-time performance information such as the number of received blocks, the number of received error blocks, the number of lost cells, the number of incorrectly inserted cells, the number of discarded cells, the number of CLP tagged cells, and the total number of received cells. It has an effect.

Claims (6)

Forward monitoring information selecting means (51) for receiving the BIP-16 value, the CLP value of the user cell header, the connection identifier from the receiving user cell monitoring means (1), and outputting a forward monitoring information selection signal; The BIP-16 value of the user cell and the CLP value of the user cell header are input from the forward monitoring information selecting means 51, and the accumulated RX_CELL 0 + 1 value and the RX_CELL 0 value and performance are stored for the received user cell. Common forward monitoring information processing means 52 which receives the accumulated BIP-16 value for the user cell received in management block units and updates and outputs the BIP-16 value; The RX_CELL 0 + 1 value, the RX_CELL 0 value, and the accumulated BIP-16 value for the user cell stored by the forward monitoring information selection signal of the forward monitoring information selecting means 51 are outputted to the common forward monitoring information processing means 52. Forward monitoring information storage means (53) for storing the new RX_CELL 0 + 1 value, the RX_CELL 0 value, and the accumulated BIP-16 value processed by the common forward monitoring information processing means (52); Received the performance management received by receiving the channel identifier value of the currently received performance management cell from the OAM cell separation means (3), receiving the stored channel identifier value and the activated channel identifier value, and comparing them with respect to the activated connection. When the cell is a forward monitoring cell, a forward monitoring information selection signal is output to the forward monitoring information storage means 53 using a connection identifier obtained from the comparison result, a reverse reporting information register selection signal is output, and the received performance is received. A performance management cell channel comparison means 54 for outputting a performance accumulation information selection signal using a connection identifier obtained from a comparison result when the management cell is a reverse report cell or a forward monitoring cell to perform performance accumulation; When the forward monitoring performance management cell is received, the backward reporting cell is configured and output using the received information and data input from the forward monitoring information storage means 53, and the CLP value transmitted through the forward monitoring cell is' Total number of user cells (TUC0 + 1) for sending user cells with 0 'or' 1 ', total number of user cells (TUC0) and BIP-16 values for sending user cells with CLP value of' 0 'to 0 The common capability of outputting a value for resetting to the forward monitoring information storage unit 53 and outputting information extracted from the reverse reporting cell configured from the reverse reporting cell and the forward monitoring performance management cell when the reverse reporting performance management cell is received. Management cell information processing means 55; Receives an activation signal from the performance management cell channel comparison means 54 and starts an operation to correspond to the performance-related cell information transmitted from the common performance management cell information processing means 55 and the connection identifier of the stored reception performance management cell. Common performance management performance accumulation information processing means 56 for receiving the information and updating the performance accumulation to output related information; Reverse report information which is stored in the reverse report information register selected by the reverse monitoring information selection signal of the performance management cell channel comparison means 54 and outputs the reverse report cell information transmitted from the common performance management cell information processing means 55. Storage means 57; The information input from the common performance management performance accumulation information processing means 56 is stored in a register selected by the performance accumulation information selection signal of the performance management cell channel comparison means 54, and the performance value and performance accumulated for each connection are accumulated. Performance management performance accumulation information storage means (58) for generating an interrupter to the CPU when performance information of the threshold value or more is accumulated by comparing the management performance accumulation threshold values; And a reference value of the number of missing and misinserted cells for declaring the threshold value and the number of excessive error cell blocks for performance cumulative information, and a reference value of the number of error cells for declaring the number of transient error cell blocks and a plurality of values for performing performance management. Channel recognizer (VPI / VCI) and enable / disable function of performance management function for a specific connection, forward monitoring performance management function of a specific connection, enable / disable function of performance management function for a cell, the performance management performance accumulation information storage means ATM layer performance management operation and maintenance (OAM), characterized in that it comprises a CPU setting register means (59) for performing a function of enabling / disabling initialization of performance management performance accumulation information register corresponding to a specific connection in (58). Cell processing device). 2. The ATM layer performance management operation and maintenance (OAM) cell processing apparatus according to claim 1, wherein said reverse report information storing means (57) comprises a plurality of reverse report information registers. 2. The ATM layer performance management operation and maintenance (OAM) cell processing apparatus according to claim 1, wherein said forward monitoring information storage means (53) comprises a plurality of forward monitoring information registers. The performance accumulation information storage means (58) according to claim 1, wherein the performance management performance cumulative information storage means (58) selects the information accumulated from the performance management performance accumulation information processing means (56) of the performance management cell channel comparison means (54). A plurality of performance management performance accumulation information registers 105 stored by signals; And a performance accumulation threshold comparing means 106 for comparing an accumulated performance value accumulated for each connection with a performance management performance accumulation threshold value and generating an interrupter to the CPU when performance information above the threshold is accumulated. Management operation and maintenance (OAM) cell processing unit. 2. The system of claim 1, wherein the CPU setting register means comprises: performance management performance accumulation threshold register means for storing a threshold value for performance accumulation information; Transient error cell block_Lost / Insert Declaration Criteria register means 101 for storing reference values of the number of lost cells and misinserted cells for declaring the number of transient error cell blocks; Transient error cell block_error declaration reference register means 102 for storing a reference value of an error cell number for declaring a transient error cell block number; Performance management cell channel registration means (103) for storing a plurality of channel identifiers (VPI / VCI) for performing performance management; And activation / deactivation function of the performance management function for a specific connection in the performance management cell channel registration means 103, activation / deactivation function of the performance management function for a forward monitoring performance management cell of a specific connection, and performance management performance accumulation information storage. ATM layer performance management operation, characterized in that it comprises a performance management control register means 104 for performing a function of enabling / disabling the initialization of the performance management performance accumulation information register 105 corresponding to a specific connection in the means 58. And maintenance (OAM) cell processing apparatus. 6. The ATM layer performance management operation and maintenance (OAM) cell processing apparatus according to claim 5, wherein the performance management cell channel register (103) comprises a plurality of performance management cell channel registers.