JP2018098667A - Communication equipment, statistical information collection method, and statistical information collection program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To collect statistical information at the same point of time as for all identifiers while continuously counting the statistical information for each identifier without increasing processing load.SOLUTION: A statistical information collection part 2 has a current value table TB1 and a record value table TB2. The statistical information collection part 2 updates a current value of statistical information in the current value table TB1 each time a frame signal S1 is input (current value update processing), and executes record value update processing and record value revision processing in a period since a record update instruction S2is input until a record maintenance instruction S2is input. In the record value update processing, the updated current value in the current value table TB1 is stored as a record value in the record value table TB2 each time the current value update processing is executed. In the record value revision processing, at least the current value in the current value table TB1 not to be an object for the record value update processing is stored as a record value in the record value table TB2.SELECTED DRAWING: Figure 8

Description

  The present invention relates to a communication apparatus, a statistical information collection method, and a statistical information collection program that count the number of frames of transmission / reception frames and discarded frames, and collect the number of bytes as statistical information in a communication system that performs data communication using frames.

  In a communication system that performs data communication using frames, for the purpose of maintenance, monitoring, and management of the communication system, each communication device used in the communication system counts the number of frames of transmitted / received frames and discarded frames, the number of bytes, A function to collect statistical information is provided.

  The collection of these statistical information is not performed on a device-by-device basis, but the identification number assigned to each frame as an identifier (the input port number to which the frame was input, the output port number to which the frame was transferred, and the header information extracted from the frame) Matching entry number when searching the search table as a search key, flow number when performing tag operation for each flow to which the frame belongs, discard factor number indicating the discard factor of the frame determined to be discarded, priority when performing frame priority control This is generally performed in units of class number, queue number when frames are stored in a queue, etc.).

  For example, Patent Document 1 discloses a communication device having a function of collecting such statistical information. The communication apparatus disclosed in Patent Document 1 collects statistical information for each identification number, reads the collected statistical information, and performs maintenance, monitoring, and management of the communication system. In this communication apparatus, a memory circuit having a large storage capacity per area is generally used in order to hold statistical information for a large number of identification numbers. When the statistical information is held using the memory circuit, the identification number is associated with the memory address, and the statistical information corresponding to the identification number is stored in the memory word indicated by the address.

Japanese Patent Laid-Open No. 2006-103672

  However, when holding statistical information using a memory circuit, the statistical information that can be accessed at the same time is usually limited to statistical information stored in words of the same address, that is, statistical information corresponding to one identification number, It is impossible to simultaneously access statistical information corresponding to a large number of identification numbers (reading statistical information stored in the memory or writing statistical information to the memory).

  For this reason, the statistical information corresponding to all the identification numbers cannot be read at the same time, and is read one by one in the order of the identification numbers. As a result, frame processing for a new frame between the time TA when the statistical information #A corresponding to the identification number A is read and the time TB when the statistical information #B corresponding to another identification number B is read. Or statistical information about new frames may be updated.

  As described above, since the statistical information of each identification number is not necessarily the value collected in the same period, when comparing the statistical information values between identification numbers, or when summing the statistical information for a plurality of identification numbers, etc. In addition, there is a problem that the comparison result and the total result are inaccurate. For example, even if the value of statistical information #B is larger than the value of statistical information #A, it is not a value collected in the same period, so the frame of identification number B is higher than the frame of identification number A. It cannot be determined that it is a rate. In addition, statistical information of both frames of identification number A and identification number B is collected separately, and even if an attempt is made to detect a system failure based on a mismatch of statistical information, it is not guaranteed that the statistical information is consistent. System failures cannot be detected based on inconsistencies.

  The collection period for each identification number can be matched by starting and stopping collecting statistical information for all identification numbers. However, since the update of statistical information stops after the collection is stopped, another period occurs in which a period during which statistical information is not collected occurs, and maintenance, monitoring, and management of a continuous communication system cannot be performed. For example, if statistical information is collected during a period in which statistical information is not collected, a device failure that can be detected cannot be detected.

  However, when two memories are prepared and collection of statistical information using one memory is stopped, statistical information is not collected by starting collecting statistical information using the other memory at the same time. It can be dealt with so that a period does not occur. However, since the statistical information held in each memory is statistical information collected only during the period in which the memory is used for collecting statistical information, to obtain continuously collected statistical information Requires reading the same number of pieces of statistical information as the number of identification numbers from the two memories, and adding them up for each identification number. For this reason, when the collected statistical information is read to perform maintenance, monitoring, and management of the communication system, the same number of summing processes as the number of identification numbers are required, and the processing load required for collecting statistical information increases. Occurs.

  The present invention has been made to solve such a problem. The object of the present invention is to continuously count statistical information for each identifier without increasing the processing load. It is an object of the present invention to provide a communication device, a statistical information collection method, and a statistical information collection program capable of collecting statistical information at the same time.

In order to achieve such an object, the present invention includes a first table (TB1) that holds the latest statistical information related to a frame signal (S1) to which an identifier is assigned, as a current value of statistical information, for each identifier, A second table (TB2) for holding the current value of statistical information relating to the frame signal held in the table for each identifier as a recorded value of the statistical information, and the latest information relating to the frame signal each time the frame signal is input Current value update processing for obtaining statistical information as a new current value of statistical information and updating the current value of statistical information in the first table corresponding to the identifier assigned to the frame signal to the new current value value updating means (21), recording the update instruction (S2 ₁₎ and a second instructing update of the recorded value of the statistical information stored in the second table Recordkeeping instruction to maintain the recorded value of the statistical information stored in Buru the (S2 _2), recording the update instruction, it is received by the order of record keeping instruction, statistical information held in the second table Recording value processing means (22) for performing a predetermined process on the recorded value, and the recording value processing means is a predetermined process from when the recording update instruction is input until the recording maintenance instruction is input. Each time the current value update processing unit executes the current value update process within the period, the current value of the statistical information in the first table updated by the current value update process is stored in the second table as a recorded value. Recording value update processing to be executed, and at least recording value revision processing to hold the current value of the statistical information in the first table that is not the target of the recording value update processing as a recorded value in the second table. Features and That.

In the present invention, the current value update process is executed every time the frame signal (S1) is input. In this current value update process, the latest statistical information regarding the frame signal (S1) is obtained as a new current value of the statistical information, and the first table (TB1) corresponding to the identifier assigned to the frame signal (S1). ) Is updated to a new current value (updated value). This current value update processing is performed continuously, when receiving a recording update instruction (S2 _1), the recording update instruction (S2 ₁₎ is recorded maintaining instruction from the time it is entered (S2 ₂₎ is input The recorded value update process and the recorded value revision process are executed within the period up to.

  In this case, in the recorded value update process, every time the current value update process is executed, the current value of the statistical information in the first table (TB1) updated by the current value update process is used as the recorded value. It is held in the table (TB2). In the recorded value revision process, at least the current value of the statistical information in the first table (TB1) that is not the target of the recorded value update process is held as the recorded value in the second table (TB2).

As a result, the second table (TB2) includes the first table (TB1) during the period from when the record update instruction (S2 ₁ ) is input to when the record maintenance instruction (S2 ₂ ) is input. Thus, the current value of the statistical information corresponding to all identifiers collected and held continuously is held as a recorded value.

In the present invention, when the record maintenance instruction (S2 ₂ ) is inputted, the recording value update processing and the recording value revision processing are stopped, and the value of the statistical information recording value in the second table (TB2) is recorded next time. If it is maintained until the update instruction (S2 ₁ ) is input, after the record maintenance instruction (S2 ₂ ) is input, within the period until the next record update instruction (S2 ₁ ) is input, The recorded value of the statistical information held in the second table (TB2) is read for each identifier, and continuously collected corresponding to all identifiers when the record maintenance instruction (S2 ₂ ) is input. It is possible to obtain the statistical information.

  In the above description, as an example, constituent elements on the drawing corresponding to the constituent elements of the invention are indicated by reference numerals with parentheses.

  As described above, according to the present invention, all the data that are continuously collected and held in the first table within the period from when the record update instruction is input until the record maintenance instruction is input. The current value of the statistical information corresponding to the identifier is held in the second table as a recorded value, and the same is true for all identifiers while continuously counting the statistical information for each identifier without increasing the processing load. It becomes possible to collect statistical information at the time.

FIG. 1 is a diagram showing an outline of a hardware configuration of a communication apparatus according to an embodiment of the present invention. FIG. 2 is a functional block diagram of the main part of the communication apparatus. FIG. 3A is a diagram illustrating a current value table provided in the statistical information collection unit of the communication device. FIG. 3B is a diagram illustrating a recorded value table provided in the statistical information collection unit of the communication device. FIG. 4 is a flowchart showing the operation of the statistical information collection unit of this communication apparatus. FIG. 5 is a diagram for explaining current value update processing executed in the statistical information collection unit of the communication apparatus. FIG. 6 is a diagram for explaining the recorded value update processing executed in the statistical information collection unit of this communication apparatus. FIG. 7 is a diagram for explaining the recorded value revision processing executed in the statistical information collection unit of this communication apparatus. FIG. 8 is a functional block diagram of the main part of the statistical information collection unit in this communication apparatus. FIG. 9 is a state transition diagram showing the operation of the statistical information collection unit of this communication apparatus.

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

  FIG. 1 is a diagram showing an outline of a hardware configuration of a communication apparatus 100 according to an embodiment of the present invention. The communication device 100 includes a central processing unit (CPU) 101, a random access memory (RAM) 102, a read only memory (ROM) 103, a storage device 104 such as a hard disk, interfaces 105 and 106, and the like. And a bus bar 107 to be connected. In addition, a statistical information collection program is installed in the communication apparatus 100 as a program unique to the present embodiment.

  In the communication device 100, the CPU 101 operates according to the installed statistical information collection program while accessing the RAM 102, the ROM 103, and the storage device 104. The statistical information collection program is provided in a state where it is recorded on a recording medium such as a CD-ROM, read out from the recording medium, recorded in the storage device 104, and installed in the communication device 100 as a usable state. ing. Note that this statistical information collection program can also be provided to the communication apparatus 100 through a network.

  FIG. 2 shows a functional block diagram of a main part of the communication apparatus 100. The communication apparatus 100 includes a frame processing unit 1, a statistical information collection unit 2, and a statistical information collection timing generation unit 3 as processing functions of the CPU 101.

The frame processing unit 1 receives the reception frame F _IN , performs processing according to the reception frame F _IN, and then outputs it as a transmission frame F _OUT . In the hardware configuration shown in FIG. 1, the reception frame F _IN is input via the interface 105, and the transmission frame F _OUT is output via the interface 106.

Examples of process according to the received frame F _IN, the input of the received frame F _IN from the input port, transfer to the output port of the received frame F _IN, the output of the transmission frame F _OUT from the output port, from the received frame F _IN searching for entries in the search table for the extracted header information as a search key, the received frame F _iN is per-flow tag operation belonging, discard determination for the received frame F _iN, priority control by priority of the received frame F _iN, the received frame For example, accumulation of F _{IN in} a queue.

Frame processing unit 1, in order to perform a process corresponding to the received frame F _IN, assigned an identification number to the received frame F _IN, to change its processing content in accordance with the granted identification numbers. An example of the identification number is an input port number to which the received frame F _IN is input, an output port number to which the received frame F _IN is transferred, and a conformance when the search table is searched using the header information extracted from the received frame F _IN as a search key. Entry number, flow number when performing tag operation for each flow to which the received frame F _IN belongs, discard factor number _indicating the discard factor of the received frame F _IN determined to be discarded, priority class when performing priority control of the received frame F _IN number, and the like queue number when accumulating received frame F _iN queue.

Frame processing unit 1 is received for each frame F _IN identification number i (any integer less than i is 0 or N; N is an integer of 1 or more) to generate a frame signal S1 granted, frame signals and the generated S1 Is output to the statistical information collection unit 2. The identification number i given to the frame signal S1 corresponds to the identifier in the present invention. This identifier is not necessarily a number. In this embodiment, the identification number i is an integer having a minimum value of 0, but may be an integer having a minimum value of n (n is an integer of 1 or more).

Frame signal S1, when performing processing for frame processing unit 1 corresponding to the received frame F _IN, a signal generated for each received frame F _IN, counted and the number of frames or the number of total bytes in statistics collection unit 2 Used for. For example, the frame signal S1 when the statistical information collection unit 2 counts the number of frames is a pulse for each frame. Further, the frame signal S1 when the cumulative number of bytes is counted in the statistical information collection unit 2 is a set of the number of bytes and a pulse corresponding to the frame length for each frame.

The statistical information collection timing generation unit 3 is an external device that performs maintenance, monitoring, and management of the communication system (a processor (not shown) that executes software for performing each process of maintenance, monitoring, and management of the communication system). Based on the request from, a statistical information collection timing signal S2 representing a recording update instruction S2 ₁ and a recording maintenance instruction S2 ₂ described later is generated and output to the statistical information collection unit 2.

  An example of a request from an external device is to record statistical information at a specified cycle. In this example, the statistical information collection timing generation unit 3 includes a timer for measuring a cycle, and generates the statistical information collection timing signal S2 based on this timer, that is, for each requested cycle. Another example of a request from an external device is to record statistical information immediately after the request. In this example, when receiving the request, the statistical information collection timing generation unit 3 generates the statistical information collection timing signal S2.

Examples of statistical information collection timing signal S2 is a set of two pulse signals, one of a set of two pulse signals but represent recording update instruction S2 _1, one of the other represents a record keeping instruction S2 _2. Another example of a statistics collection timing signal S2 is a 1-bit signal, 1 fall of bits of the signal (the value changes from "1" to "0") when represents a record update instruction S2 _1, 1 rise of bit signals (value changes from "0" to "1") when represents a record keeping instruction S2 _2. In statistics collection timing signal S2, the recording update instruction S2 ₁ and recordkeeping instruction S2 ₂ is recorded update instruction S2 ₁ is generated earlier, record keeping instruction S2 ₂ after a predetermined time has elapsed is generated. That is, the record update instruction S2 ₁ and the record maintenance instruction S2 ₂ are generated in this order.

  The statistical information collection unit 2 includes a current value table TB1 (corresponding to the first table in the present invention) that holds the current statistical information (the latest statistical information) regarding the frame signal S1 as the current value of the statistical information for each identification number. And a recording value table TB2 (corresponding to the second table in the present invention) that holds the current value of the statistical information related to the frame signal S1 held in the current value table TB1 for each identifier as the recorded value of the statistical information. Yes.

  Each of the current value table TB1 and the recorded value table TB2 can hold statistical information #i corresponding to each identification number i (i is an arbitrary integer between 0 and less than N) (FIGS. 3A and 3B). Reference), obtaining statistical information #i that is retained by specifying identification number i, and updating statistical information #i that is retained by specifying identification number i and statistical information #i .

  When the current value table TB1 or the recorded value table TB2 is implemented as a circuit, the statistical information collecting unit 2 includes each memory corresponding to the current value table TB1 and the recorded value table TB2, and an identification number i is assigned to each memory address i. Statistical information #i corresponding to is stored. In this case, the read value when the word at the address i is read from the memory is the value of the stored statistical information #i, and the statistical information #i (new statistical information #i) is added to the word at the address i in the memory. By writing, the stored statistical information #i (last statistical information #i) can be updated.

  In the above example, the identification number i is an integer having a minimum value of 0, but may be an integer having a minimum value of n (n is an integer of 1 or more). In this case, by storing the statistical information #i at the memory address i−n, it is not necessary to prepare a memory area for unnecessary statistical information i ′ (i ′ = 0... N−1). It is also possible to store the statistical information #i corresponding to the identification number i at the memory address i + m (m is an integer of 1 or more), and use the memory to store other statistical information. (For example, if m = N, the number of frames with the identification number i is recorded in the word at the address i of the memory, and the cumulative number of bytes of the identification number i is recorded at the address i + m in the memory).

Statistics collection unit 2 receives the recording update instruction S2 ₁ and recording maintenance instruction S2 ₂ sent from the statistics collection timing generator 3, the recording value of the statistical information stored in the recording value table TB2 A function of performing predetermined processing. The predetermined process performed by the statistical information collection unit 2 will be described later. The recording update instruction S2 ₁ as a command for instructing the update of the recorded value of the statistical information stored in the recording value table TB2, record keeping instruction S2 ₂ is the statistical information stored in the recording value table TB2 The command is input from the statistical information collection timing generation unit 3 to the statistical information collection unit 2 as a command for instructing maintenance of the recorded value.

  FIG. 4 is a flowchart showing the operation of the statistical information collection unit 2. It is assumed that at the start of this operation, the current value table TB1 and the recorded value table TB2 are cleared and the loop counter is initialized with j = 0.

  When the frame signal S1 is input (YES in step S101), the statistical information collection unit 2 assigns the identification number i (i is an arbitrary integer between 0 and N) to the input frame signal S1. The statistical information #i in the corresponding current value table TB1 is updated to the latest statistical information #i (see FIG. 5).

  That is, the statistical information collection unit 2 acquires the statistical information #i (previous current value) held in the current value table TB1 (step S102), and receives the input frame signal S1 and the acquired statistical information #i ( The updated value (new current value) of the statistical information #i is calculated based on (the previous current value) (step S103), and the statistical information #i (the previous current value) in the current value table TB1 is calculated in step S103. The updated value (new current value) of the statistical information #i is rewritten (step S104). The processing in steps S102 to S104 is referred to as “current value update processing”. The statistical information collection unit 2 repeats this current value update process every time the frame signal S1 is input.

  For example, when the statistical information is the number of frames, in the current value update processing in steps S102 to S104, the frame signal S1 to which the identification number i is assigned is received, and the statistical information #i (the current current value from the current value table TB1) is received. Value) (reads out the memory address i corresponding to the current value table TB1 and sets the read value as the statistical information #i (previous current value)), and the acquired statistical information #i (preceding current value) A value obtained by adding 1 is held in the current value table TB1 as an updated value (new current value) of the statistical information #i (an updated value (new current value) is written in the address i of the memory corresponding to the current value table TB1).

  For example, when the cumulative number of bytes is counted as statistical information, the current value update process in steps S102 to S104 receives the frame signal S1 with the identification number i attached and the frame length (number of bytes), and from the current value table TB1. The statistical information #i (previous current value) is acquired, and the value obtained by adding the frame length (number of bytes) to the acquired statistical information #i (previous current value) is the updated value of the statistical information #i (new current value) ) Is stored in the current value table TB1 (an updated value (new current value) is written in the memory address i corresponding to the current value table TB1).

The statistical information collection unit 2 executes the current value update process every time the frame signal S1 is input, but the period from when the recording update instruction S2 ₁ is input to when the recording maintenance instruction S2 ₂ is input, that is, is inputted recording update instruction S2 _1, and records maintenance instruction S2 ₂ is YES in step S105 is not entered, the current value update processing (step S 102 to S 104) in conjunction with the recorded value update processing (step S106) Is executed (repetition of steps S101 to S108).

  In the recorded value update process in step S106, statistical information #i (updated value (new current value)) in the current value table TB1 updated by the current value update process is stored as a recorded value in the recorded value table TB2. (See FIG. 6).

Therefore, at the time when the current value update process and the recorded value update process are finished based on the frame signal S1 to which the identification number i is assigned, the statistical information #i held in the current value table TB1 and the recorded value table TB2 respectively. Have the same value. As a result, for the statistical information #i for which the record value update processing has been performed within the period from when the record update instruction S2 ₁ is input to when the record maintenance instruction S2 ₂ is input, the current value table TB1 and the record value table Each holding value of TB2 is guaranteed to be the same.

Also, statistics collection unit 2, record update instruction S2 ₁ is the time after input, in the order of identification numbers, i.e. loop counter j = 0, which corresponds to the identification number. . . Based on N-1, a record value revision process is performed to copy the statistical information #j held in the current value table TB1 to the statistical information #j of the recording value table TB2 (see steps S110 and S111, FIG. 7).

In the current value table TB1 in which the record value update processing has not been performed within the period from when the record update instruction S2 ₁ is input to when the record maintenance instruction S2 ₂ is input by the record value revision process in steps S110 and S111. The statistical information #i is also stored in the recording value table TB2. Thus, it is guaranteed that the retained values in the current value table TB1 and the recorded value table TB2 are the same.

However, when the record value revision processing is not completed within the period from when the record update instruction S2 ₁ is input to when the record maintenance instruction S2 ₂ is input, that is, all the values held in the current value table TB1 Statistical information #j; j = 0. . . If a copy of the N-1 to the recording value table TB2 is not the end, matching the current value each holding values in the table TB1 and the recording value table TB2 of when the record keeping instruction S2 ₂ is input is not guaranteed. Therefore, statistics collection timing generator 3, than the time required to complete the recording value revision process, as the time from the timing of recording update instruction S2 ₁ to the timing of the record keeping instruction S2 ₂ becomes longer, recording It is necessary to generate a statistical information collection timing signal S2 representing the update instruction S2 ₁ and the record keeping instruction S2 ₂ .

  In the above example, the loop counter j is an integer having a minimum value of 0, but may be an integer having a minimum value of n (n is an integer of 1 or more). In this case, j = n. . . For N-1, the statistical information #j held in the current value table TB1 is copied to the statistical information #j of the recording value table TB2. In addition, the loop counter j is incremented by 1 from the minimum value of the identification number until the maximum value of the identification number is reached. Instead of repeating the recording value revision process, the maximum value of the identification number is decremented by 1 to the minimum value. It may be a method of repeating the recorded value revision process until the value is reached. Moreover, as long as it is a method that can copy the statistical information #i held in the current value table TB1 to the statistical information #i of the recording value table TB2 at least once for all the identification numbers i used. A method may be used in which the record value revision process is performed for all identification numbers regardless of the increment or decrement of the loop counter j.

Further, for the identification number i in which the statistical information #i in the current value table TB1 and the recorded value table TB2 has the same value by the recorded value update process, the recorded value revision process can be omitted. For example, for each identification number i, the recording value update flag #i indicating whether already carried out recording value updating process is provided to clear all records value update flag when the recording update instruction S2 ₁ is input The record value update flag #i is set when the record value update process for the identification number i is performed, and the record value update flag #j is set when the record value revision process is performed based on the loop counter j. If the recording value revision process is performed only for the identification number j that has not been recorded, the identification number i for which the statistical information #i in the current value table TB1 and the recording value table TB2 has the same value as a result of the recording value update process. It is possible to omit the recorded value revision process.

  Each statistical information #i held in the current value table TB1 of the statistical information collecting unit 2 is subjected to a current value update process for each input of the frame signal S1 assigned with the identification number i. While 2 is operating, it matches the value of the statistical information continuously collected for the identification number i.

Further, each statistic #j stored in the recorded value table TB2 statistics collection unit 2, a recording after the update instruction S2 ₁ is input, for every identification number j, the recorded value update processing or recording value revision Processing or both are applied.

  After the record value revision processing for the statistical information #j is performed for all the identification numbers j (j = 0... N-1), an arbitrary identification number i (i is an integer between 0 and N-1). Along with the update to the statistical information #i of the current value table TB1 by the current value update process when the assigned frame signal S1 is received, the current value table TB1 to the statistical information #i of the recorded value table TB2 by the recorded value update process Is updated to the same value as the statistical information #i.

As a result, at the time when the period from when the record update instruction S2 ₁ is input to when the record maintenance instruction S2 ₂ is input ends, the statistical information #j of the current value table TB1 and the statistical information #j of the recording value table TB2 Are equal to each other, and the statistical information #j in the recording value table TB2 matches the value of the statistical information continuously collected with respect to the identification number j.

Statistics collection unit 2, when the recording maintenance instruction S2 ₂ is input, stopping the recording value update processing and recording values revision process. Thus, statistical information #j that has been held in the recording value table TB2 maintains the value at which the record keeping instruction S2 ₂ is input.

Therefore, during the period from when the record maintenance instruction S2 ₂ is input until the next record update instruction S2 ₁ is input, each statistical information #j held in the record value table TB2 has the record maintenance instruction S2 ₂ It matches the value of the statistical information continuously collected with respect to the identification number j up to the point of input. Incidentally, statistics collection unit 2, _{when 1} next recording update instruction S2 is inputted, releases the maintenance of the value of the statistical information held in the recording value table TB2 triggered by the record keeping instruction S2 _2, provided to the input of the next record keeping instruction S2 _2.

As described above, the statistical information #j held in the record value table TB2 after the record maintenance instruction S2 ₂ is input until the next record update instruction S2 ₁ is input is the record maintenance instruction S2 _2. The value of the statistical information continuously collected with respect to the identification number j is maintained up to the time when is input. During the period in which the value of the statistical information in the recorded value table TB2 is maintained, the frame signal S1 to which the identification number i is assigned to the statistical information held in the current value table TB1 of the statistical information collecting unit 2 The current value update process is executed for each input.

Thus, after the recording maintenance instruction S2 ₂ is input, records the period until ₁ the next recording update instruction S2 is inputted, once each statistical information held in the recording value table TB2 each identification number if to read from the value table TB2, it becomes a continuous statistical information collected for all of the identification number at the time the record keeping instruction S2 ₂ is input can be obtained.

  In the recorded value update process and the revised record value process, the value of the statistical information #i held in the current value table TB1 and the value of the statistical information #i of the recorded value table TB2 are not completely matched, The value of the statistical information #i held in the value table TB1 is converted into a value required for the maintenance, monitoring and management of the communication system, and the converted value is converted into the statistical information of the recording value table TB2. It is also possible to hold it as #i.

  For example, the value of the statistical information #i held in the current value table TB1 is the cumulative number of bytes in units of 1 byte, but the value necessary for maintenance, monitoring, and management of the communication system is in units of 1 Kbyte. If so, the value of the total number of bytes in units of 1 byte is rounded off or rounded off to the nearest 1 Kbytes, and converted to a value of total bytes in 1 Kbyte units. And stored as statistical information #i of the recorded value table TB2. As a result, a memory having a smaller capacity than the memory capacity required for the current value table TB1 can be used for the recording value table TB2, and the apparatus cost can be reduced.

  FIG. 8 shows a functional block diagram of the main part of the statistical information collection unit 2, and FIG. 9 shows a state transition diagram showing the operation of the statistical information collection unit 2. The statistical information collection unit 2 includes a current value update processing unit 21 and a recorded value processing unit 22 as processing functions of the CPU 101.

  Each time the frame signal S1 is input, the current value update processing unit 21 obtains the latest statistical information regarding the frame signal S1 as a new current value, and the current value corresponding to the identification number assigned to the frame signal S1. A current value update process is executed to update the current value (last current value) of the statistical information in the table TB1 to a new current value (updated value). This current value update process is executed in all of the transition states M1 (current value update state), M2 (current value & recorded value update state 1), and M3 (current value & recorded value update state 2) shown in FIG. .

Recording value processing unit 22 receives the recording update instruction S2 ₁ and recording maintenance instruction S2 ₂ from statistics collection timing generator 3, a predetermined processing for recording values of the statistical information stored in the memory table TB2 I do.

As the predetermined processing, the recorded value processing unit 22 updates the current value within the period from when the recording update instruction S2 ₁ is input to when the recording maintenance instruction S2 ₂ is input. Every time the process is executed, the recorded value update causes the recorded value table TB2 to store the current value (new current value (updated value)) of the statistical information in the current value table TB1 updated by the current value updating process as a recorded value. Processing (see transition state M6 (recording value update state) shown in FIG. 9) and at least the current value of the statistical information in the current value table TB1 that is not the target of the recording value update process is recorded in the recording value table TB2. The recorded value revision process to be held (see transition state M5 (recorded value revision state) shown in FIG. 9) is executed.

The recording value processing unit 22, a predetermined process of the further, at the time the record keeping instruction S2 ₂ is inputted, stops the recording value update processing and recording values revision process, the statistical information in the recording value table TB2 the value of the recorded values to perform a process of maintaining until the next recorded value update instruction S2 ₁ is input (see the transition state shown in FIG. 9 M4 (recorded value maintained state)). The recording value processing unit 22, a predetermined processing of the further, at the time when the recording value update instruction S2 ₁ is input, executes processing for releasing the maintained value of the recorded value of the statistical information in the recording value table TB2 To do.

  In the transition state M1 shown in FIG. 9, current value update processing (update of statistical information #i in the current value table TB1) is performed (example: updated value = statistic information # i + 1 in the current value table TB1; current value table). TB1 statistical information # i = updated value;). In the transition states M2 and M3 shown in FIG. 9, the current value update process (update of statistical information #i in the current value table TB1) and the record value update process (recorded value of statistical information #i in the updated current value table TB1) (Reflected in the statistical information #i of the table TB2) (example: updated value = statistical information # i + 1 in the current value table TB1; statistical information #i in the current value table TB1 = updated value; statistical information in the recorded value table TB2) # I = update value;). In the transition state M5 shown in FIG. 9, all the identification numbers j (j = 0... N-1) are recorded value revision processing (statistic information #j value of the recorded value table TB2 of the current value table TB1). (For example: for j = 0... N-1 {updated value = statistical information #j of current value table TB1; statistical information # j = updated value of recorded value table TB2) ;)).

  In the prior art, as described above, the statistical information corresponding to all the identification numbers cannot be read at the same time, but one by one in the order of the identification numbers, so that the collection periods for each identification number can be matched. However, there was a problem that the collected statistical information values were inaccurate. In addition, in order to deal with the problem, it is possible to match the collection period for each identification number by starting and stopping collecting statistical information for all identification numbers. Therefore, there is a period in which statistical information is not collected, and there is a problem that statistical information cannot be collected continuously. In addition, in order to deal with the problem, two memories are prepared, and when collecting statistical information using one memory is stopped, simultaneously collecting statistical information using the other memory is started. However, since it is necessary to add up the statistical information held in each memory for each identification number, there arises a problem that the processing load required for collecting the statistical information increases.

In contrast, the communication device 100 of the present embodiment, by reading the statistical information from the recording value table TB2 once every identification number, all of the identification number at the time the record keeping instruction S2 ₂ is input The statistical information collected continuously can be acquired. For this reason, all the problems in the conventional technology can be solved, and while maintaining statistical information for each identifier for the maintenance, monitoring and management of the communication system without increasing the processing load, As a result, it is possible to collect statistical information (number of frames of transmitted / received frames and discarded frames and the number of bytes) at the same time.

[Extension of the embodiment]
The present invention has been described above with reference to the embodiment. However, the present invention is not limited to the above embodiment. Various changes that can be understood by those skilled in the art can be made to the configuration and details of the present invention within the scope of the technical idea of the present invention.

  DESCRIPTION OF SYMBOLS 1 ... Frame processing part, 2 ... Statistical information collection part, 3 ... Statistical information collection timing generation part, 21 ... Current value update processing part, 22 ... Recording value processing part, TB1 ... Current value table, TB2 ... Recording value table, 100 ... Communication device, 101 ... CPU, 102 ... RAM, 103 ... ROM, 104 ... Storage device, 105, 106 ... Interface.

Claims (7)

A first table that holds the latest statistical information related to the frame signal to which the identifier is assigned for each identifier as a current value of the statistical information;
A second table for holding a current value of the statistical information held in the first table for each identifier as a recorded value of statistical information;
Each time the frame signal is input, the latest statistical information on the frame signal is obtained as a new current value of the statistical information, and the statistics in the first table corresponding to the identifier assigned to the frame signal Current value update processing means for executing current value update processing for updating the current value of information to the new current value;
A record update instruction for instructing update of a record value of the statistical information held in the second table, and a record maintenance instruction for instructing maintenance of a record value of the statistical information held in the second table; A record value processing means for receiving the record update instruction and the record maintenance instruction in order and performing a predetermined process on the record value of the statistical information held in the second table;
The recorded value processing means includes
As the predetermined processing,
Within a period from when the record update instruction is input to when the record maintenance instruction is input,
Each time the current value update processing unit executes the current value update process, the current value of the statistical information in the first table updated by the current value update process is recorded in the second table as a recorded value. Record value update processing to be retained,
And executing a record value revision process for holding, in the second table, a current value of the statistical information in the first table that is not a target of the record value update process as a record value. Communication device. The communication device according to claim 1,
The recorded value processing means includes
As the predetermined process,
When the record maintenance instruction is input, the recording value update process and the record value revision process are stopped, and the next record update instruction is input to the value of the record value of the statistical information in the second table. A communication device characterized by executing a process to be maintained until The communication device according to claim 2,
The recorded value processing means includes
As the predetermined process,
The communication apparatus, wherein when the recording value update instruction is input, a process of canceling the maintenance of the recorded value of the statistical information in the second table is executed. A first table that holds the latest statistical information regarding the frame signal to which the identifier is assigned as a current value of the statistical information for each identifier, and a current value of the statistical information that is held in the first table A statistical information collection method applied to a communication device including a second table that holds each recorded identifier as a recorded value,
Each time the frame signal is input, the latest statistical information on the frame signal is obtained as a new current value of the statistical information, and the statistics in the first table corresponding to the identifier assigned to the frame signal A current value update processing step for executing a current value update process for updating a current value of information to the new current value;
A record update instruction for instructing update of a record value of the statistical information held in the second table, and a record maintenance instruction for instructing maintenance of a record value of the statistical information held in the second table; A record value processing step for performing a predetermined process on the record value of the statistical information held in the second table in response to the record update instruction and the record maintenance instruction,
The recorded value processing step includes
As the predetermined processing,
Within a period from when the record update instruction is input to when the record maintenance instruction is input,
Each time the current value update processing unit executes the current value update process, the current value of the statistical information in the first table updated by the current value update process is recorded in the second table as a recorded value. Record value update processing to be retained,
And executing a record value revision process for holding, in the second table, a current value of the statistical information in the first table that is not a target of the record value update process as a record value. Statistical information collection method. The statistical information collection method according to claim 4,
The recorded value processing step includes
As the predetermined process,
When the record maintenance instruction is input, the recording value update process and the record value revision process are stopped, and the next record update instruction is input to the value of the record value of the statistical information in the second table. A statistical information collection method characterized by executing a process that is maintained until The statistical information collection method according to claim 5,
The recorded value processing step includes
As the predetermined process,
A statistical information collection method comprising: executing a process of canceling the maintenance of the recorded value of the statistical information in the second table when the recorded value update instruction is input.   The statistical information collection program for making a computer perform the process of each step in the statistical information collection method described in any one of Claims 4-6.

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