JP5301600B2 - Bandwidth control evaluation device - Google Patents

Description

  The present invention relates to ITU-T Rec. G. The present invention relates to a bandwidth control evaluation apparatus for testing a bit rate adjustment function defined in 709 (12/2009).

  The bit rate of OTN (Optical Transport Network) was defined based on the bit rate of SONET (Synchronous Optical Network) / SDH (Synchronous Digital Hierarchy). For this reason, it is necessary to extend the OTN standard every time a new Ethernet (registered trademark) or fiber channel having a different bit rate is added.

  However, it is not desirable to extend the standard every time a new client signal appears. Therefore, ITU-T Rec. G. In 709 (12/2009), GMP (Generic Mapping Procedure) is adopted in order to be able to cope with any client signal of any bit rate in the future. GMP is a method of mapping a client having a bit rate equal to or less than the payload capacity, and the transmission unit distributes data and staff in the payload area as shown in FIG. Then, as shown in FIG. 4, JC bytes JC1 to JC6 which are information for adjusting the bit rate are stored in OH (Over Head).

JC bytes JC1 and JC2 represents variation condition integer value portion _{C m} and _{C m} of the data amount included in Payload Area calculated by the transmission unit. Until C1~C14 of JC1 and JC2 represents _{C m,} II and DI represents the variation condition of _{C m.} That is, JC1 is composed of 14 bits C1 to C14, for example, and JC2 is composed of 2 bits (II, DI), for example. The JC byte JC3 is a CRC (Cyclic Redundancy Check) of the JC byte JC1 and the JC byte JC2. The JC bytes JC4 and JC5 are numerical values that represent, in hexadecimal, a numerical value ΣC _nD obtained by integrating the surplus C _nD obtained by dividing the amount of data included in the payload area by C _m for each frame. JC byte JC6 is the CRC of JC byte JC4 and JC byte JC5. Then, the receiving unit obtains a parameter using the JC bytes JC1 to JC6, varies the data amount to be extracted according to the procedure according to the parameter and the fluctuation condition, and sets the data amount that matches the data amount calculated by the transmitting unit. Receive.

ITU-T Rec. G. 709 (12/2009)

  ITU-T Rec. G. 709 (12/2009), in order to comply with the data amount stored in the OH and the variation condition of the data amount, the staff or the position of the data and the staff stored in the Payload Area actually transmitted or The data position must match.

  Therefore, according to the present invention, the position of the staff or data obtained from the data amount stored in the OH and the variation condition of the data amount matches the position of the staff or data stored in the actually transmitted Payload Area. The purpose is to display the position of the staff or data obtained from the data amount stored in the OH and the variation condition of the data amount.

In order to achieve the above object, the bandwidth control evaluation apparatus of the present invention provides:
From OPU (Optical channel Payload Unit) frame of OH (Overhead), JC1 represents the first half of a data amount contained in Payload Area calculated by the transmission unit integer _{C m,} the second half and the settling of the integer values _{C m} JC byte extractor for extracting JC3 representing a CRC (Cyclic Redundancy Check) of JC2 and the representative of the variation condition of numerical _{C m} JC1 and the JC2 (11),
A data amount calculation unit (21) that calculates the amount of data included in the payload area of the OPU frame using JC1, JC2, and JC3 extracted by the JC byte extraction unit;
A position calculation unit (23) that calculates the position of staff or data stored in the Payload Area using the data amount calculated by the data amount calculation unit;
And the integer value _{C m} and the integer value staff or position reference table location data and is associated at the time of storing the data in the data amount based on the _{C m} in Payload Area (25),
An integer value C _m that matches the integer value C _m calculated by the data amount calculation unit is selected from the position reference table, and the position of the selected staff or data in the position reference table and the calculation of the position calculation unit are selected. A determination unit (24) for determining whether or not the staff or data position matches,
A display unit (13) for displaying the position of the staff or data calculated by the position calculation unit by mapping and displaying each coordinate on a map associated with the position of Payload Area, and displaying the determination result of the determination unit ; Is provided.

Since the bandwidth control evaluation apparatus according to the present invention includes the JC byte extraction unit (11), the data amount stored in the OH and the variation condition of the data amount can be acquired. Since the bandwidth control evaluation apparatus according to the present invention includes the data amount calculation unit (21) and the position calculation unit (23), it is possible to calculate the position of the staff or data stored in the payload area. Since the bandwidth control evaluation apparatus according to the present invention includes the display unit (13), it can display the position of the staff or data stored in the payload area. Therefore, the bandwidth control evaluation apparatus according to the present invention can display the data amount stored in the OH and the position of the staff or the data obtained from the variation condition of the data amount.
Bandwidth control and evaluation device of the present invention, since with a location reference table (25) and the determination unit (24), stores the C _m and the position of the stuff or data bit rate defined by the standard to a position reference table Thus, it is possible to determine whether the position of the staff or the data obtained from the data amount stored in the OH and the variation condition of the data amount is correct.

In the bandwidth control evaluation device of the present invention, the data amount calculation unit is further included in the Payload Area of the OPU frame using the data amount variation condition included in JC1 and JC2 extracted by the JC byte extraction unit. An upper limit value and a lower limit value of the amount of data to be generated, and the position calculation unit further calculates the position of the staff or data stored in the Payload Area using the upper limit value, and uses the lower limit value. The position of the staff or data stored in the Payload Area is calculated, and the display unit further displays the position of the staff or data when the upper limit value calculated by the position calculation unit is used, and the position The position of the staff or data when using the lower limit value calculated by the calculation unit may be displayed.
The bandwidth control evaluation device of the present invention displays the position of the staff or data when the upper limit value of the data amount included in the payload area is displayed, and the position of the staff or data when the lower limit value of the data amount included in the payload area is displayed Therefore, it is possible to determine whether the staff or the position of the data in the range where the data amount varies is correct.

In the bandwidth control evaluation apparatus according to the present invention, the position calculation unit determines whether each payload field obtained by dividing the payload area into the maximum storage data amount P _{m, server} is staff or data, and thereby determines the payload area. The position of the stored staff or data is calculated, and the display unit displays the position of the staff or data calculated by the position calculation unit by mapping each coordinate on a map associated with the payload field. May be.

  In the bandwidth control evaluation apparatus of the present invention, the display unit further displays the number of the payload field determined by the position calculation unit as the staff, or the number of the payload field determined by the position calculation unit as data. It may be displayed.

In order to achieve the above object, the bandwidth control evaluation method of the present invention is:
From OH of OPU frames, representing the variation condition of the second half and the integer value _{C m} for JC1, the integer value _{C m} represents the first half of the integer value _{C m} is the data amount included in Payload Area calculated by the transmission unit JC2 JC byte extraction procedure for extracting JC3 representing CRC of JC1 and JC2,
A data amount calculation procedure for calculating a data amount included in the Payload Area of the OPU frame using JC1, JC2, and JC3 extracted in the JC byte extraction procedure;
Using the data amount calculated in the data amount calculation procedure, a position calculation procedure for calculating the position of the staff or data stored in the Payload Area;
Referring to staff or position reference table position and is associated data when the stored data in the data amount based on the integer values C _m and the integer value C _m in Payload Area, calculated by the data amount calculation procedure An integer value _Cm that matches the integer value _Cm is selected from the position reference table, and the position of the staff or data in the selected position reference table and the position of the staff or data calculated in the position calculation procedure A determination procedure for determining whether or not match,
A display procedure for sequentially displaying the position of the staff or data calculated in the position calculation procedure on each map in which the coordinates are mapped on the map associated with the position of the payload area and displaying the determination result in the determination procedure .

Since the bandwidth control evaluation method of the present invention has the JC byte extraction procedure, it is possible to acquire the data amount stored in the OH and the variation condition of the data amount. Since the bandwidth control evaluation method of the present invention has a data amount calculation procedure and a position calculation procedure, the position of the staff or data stored in the Payload Area can be calculated. Since the bandwidth control evaluation method of the present invention has a display procedure, the staff or data position stored in the Payload Area can be displayed. Therefore, the bandwidth control evaluation method of the present invention can display the data amount stored in the OH and the position of the staff or the data obtained from the variation condition of the data amount.
Bandwidth control evaluation method of the present invention has a determination procedure by the C _m and the position of the stuff or data bit rate defined by the standard and stored in the location reference table is stored in the OH It is possible to determine whether the position of the staff or the data obtained from the data amount and the variation condition of the data amount is correct.

In the bandwidth control evaluation method of the present invention, in the data amount calculation procedure, further included in the Payload Area of the OPU frame using the data amount variation condition included in JC1 and JC2 extracted in the JC byte extraction procedure. In the position calculation procedure, the position of the staff or data stored in the Payload Area is calculated using the upper limit value, and the lower limit value is used. The position of the staff or data stored in the Payload Area is calculated, and in the display procedure, the position of the staff or data when the upper limit value calculated in the position calculation procedure is used is further displayed, and the position Staff or data when using the lower limit calculated in the calculation procedure Position may be displayed.
The bandwidth control evaluation method of the present invention displays the position of the staff or data when the upper limit value of the data amount included in the payload area is displayed, and the position of the staff or data when the lower limit value of the data amount included in the payload area is displayed Therefore, it is possible to determine whether the staff or the position of the data in the range where the data amount varies is correct.

In the bandwidth control evaluation method of the present invention, in the position calculation procedure, by determining whether each payload field obtained by dividing the payload area into the maximum storage data amount P _{m, server} is stuff or data, the payload area is assigned to the payload area. The position of the stored staff or data is calculated, and in the display procedure, the position of the staff or data calculated in the position calculation procedure is displayed by mapping each coordinate on a map associated with the payload field. May be.

  In the bandwidth control evaluation method of the present invention, in the display procedure, the number of the payload field determined as the staff in the position calculation procedure is further displayed, or the number of the payload field determined as the data in the position calculation procedure is displayed. It may be displayed.

In order to achieve the above-described object, the bandwidth control evaluation program of the present invention includes a JC byte extraction procedure, a data amount calculation procedure, a position calculation procedure and a display procedure, or a JC byte extraction procedure, a data amount calculation procedure, A program for causing a computer to execute a position calculation procedure, a determination procedure, and a display procedure.
According to the present invention, since the bandwidth control evaluation method of the present invention can be executed using a computer, it is possible to display the data amount stored in the OH and the position of the staff or data obtained from the variation condition of the data amount. it can.

  According to the present invention, it is possible to display the data amount stored in the OH and the position of the staff or the data obtained from the variation condition of the data amount. Therefore, by referring to the position of the staff or data stored in the Payload Area that is actually transmitted, the position of the staff or data obtained from the data amount stored in the OH and the variation condition of the data amount is actually It is possible to confirm whether or not the staff or data position stored in the transmitted payload area matches.

1 shows an example of a bandwidth control evaluation apparatus according to the present embodiment. An example of a position reference table is shown. The example of a display of the display part 13 is shown. An example of distributed data and staff by GMP. ITU-T Rec. G. An outline of OH in a frame defined in 709 (12/2009) is shown.

  Embodiments of the present invention will be described with reference to the accompanying drawings. The embodiments described below are examples of the present invention, and the present invention is not limited to the following embodiments. In the present specification and drawings, the same reference numerals denote the same components.

  FIG. 1 shows an example of a bandwidth control evaluation apparatus according to this embodiment. The bandwidth control evaluation apparatus according to the present embodiment includes a JC byte extraction unit 11, a calculation unit 12, and a display unit 13. The calculation unit 12 includes a data amount calculation unit 21, a position calculation unit 23, a determination unit 24, and a position reference table 25.

FIG. 2 shows an example of the position reference table. The position reference table 25 is a table in which C _m is associated with the position of the staff when data of the data amount based on the C _m is stored in the payload area. In this table, for example, the value of _{C m} "15168", _{C m} is Payload field number _J15168 S1 staff is stored when 15168, _J15168 S2, and a ... associated.

  The bandwidth control evaluation method according to the present embodiment includes a JC byte extraction procedure, a calculation procedure, and a display procedure in this order. In the calculation procedure, the calculation unit 12 performs various calculations using at least one of JC1, JC2, JC3, JC4, JC5, and JC6 extracted by the JC byte extraction unit 11. The calculation procedure includes, for example, a data amount calculation procedure, a position calculation procedure, and a determination procedure in this order. The bandwidth control evaluation program according to the present embodiment includes a JC byte extraction procedure, a data amount calculation procedure, a position calculation procedure and a display procedure, or a JC byte extraction procedure, a data amount calculation procedure, a position calculation procedure, a determination procedure, and a display procedure. A program for causing a computer to execute.

  In the JC byte extraction procedure, the JC byte extraction unit 11 extracts JC1, JC2, JC3, JC4, JC5, and JC6, which are information for calculating the data amount stored in the payload area, from the OH of the OPU frame. . JC1 represents the first half of the amount of data included in the Payload Area calculated by the transmission unit. Here, the first half of the data amount included in the payload area refers to, for example, 8 bits from C1 to C8 in the first half when the data amount calculated by 14 bits of C1 to C14 is stored. JC2 represents the latter half of the data amount included in the Payload Area calculated by the transmission unit and the variation condition of the data amount. Here, the latter half of the data amount included in the payload area indicates, for example, 6 bits from C9 to C14 in the latter half when the data amount calculated by 14 bits C1 to C14 is stored. JC3 represents the CRC of JC1 and JC2.

In the data amount calculation procedure, the data amount calculation unit 21 uses JC1, JC2, and JC3 extracted by the JC byte extraction unit 11 to calculate the data amount included in the Payload Area of the OPU frame. The amount of data, for example, an integer value portion _{C m} of the amount of data contained in Payload Area of OPU frames. In the position calculation procedure, the position calculation unit 23 uses the C _m calculated by the data amount calculation unit 21 to calculate the position of the staff stored in the Payload Area. In the determination procedure, the determination unit 24 determines whether or not the staff position calculated by the position calculation unit 23 is a predetermined position. In the display procedure, the display unit 13 displays the calculation result of the calculation unit 12.

  FIG. 3 shows a display example of the display unit 13. The display unit 13 displays a stuff position map 51, a max button 52, a min button 53, a stuff position list 54, and a pattern matching result.

The stuff position list 54 displays the position determined by the position calculation unit 23 as a staff member. Here, the position is, for example, the number j of the payload field obtained by dividing the payload area into the maximum storage data amount P _{m, server} (j = 1... P _{m, server} ).

In the stuff position map 51, the position of the staff is mapped on the map in which each coordinate is associated with the position of the payload area or the position of the payload field. For example, if P _{m, server} is 15200, the payload field number j = 95 is associated with the coordinates (95,1), the payload field number j = 15106 is associated with the coordinates (1,160), and the coordinates ( 95, 160) is associated with the payload field number j = 15200. And it maps on the coordinate linked | related with the number j of the Payload field where a staff is arrange | positioned.

Max button 52 is a button for switching the display when C _m is the maximum value. When the Max button 52 is selected, the position calculation unit 23 outputs the payload field number j and coordinates when C _m is the maximum value to the display unit 13. The display unit 13 displays the stuff position map 51 and the stuff position list 54 at the maximum value of C _m calculated by the data amount calculation unit 21.

The Min button 53 is a button for switching to a display when C _m is the minimum value. When the Min button 53 is selected, the position calculation unit 23 outputs the payload field number j and coordinates when C _m is the minimum value to the display unit 13. The display unit 13 displays the stuff position map 51 and the stuff position list 54 at the minimum value of C _m calculated by the data amount calculation unit 21.

  The pattern matching result is a determination result of the determination unit 24. For example, OK is displayed when the determination unit 24 determines that they match, and NG is displayed when the determination unit 24 determines that they do not match.

The calculation of the data amount in the data amount calculation unit 21 illustrated in FIG. 1 is performed as follows, for example.
C1 to C14 indicating the integer value portion C _m (t) in JC1 and JC2 are converted into decimal numbers. It is determined whether or not the CRC calculation values of JC1 and JC2 extracted by the JC byte extraction unit 11 match the JC3 extracted by the JC byte extraction unit 11.

Here, the data amount calculation unit 21 performs an operation synchronized with C _m (t) sent from the transmission source. This synchronized operation is described in, for example, FIG. D. of ITU-T. 7 / G. 709 / Y. It is the operation described in the diagram described in 1331-GMP sink count synchronization process diagram. The value of C _m (t) varies depending on the synchronization state.

In synchronization, the data amount calculation unit 21 analyzes JC1 and JC2. For example, whether II and DI shown in FIG. 5 match, whether CRC of JC1 and JC2 matches JC3, whether JC1 is a Valid pattern or Invalid pattern, and JC2 is a Valid pattern or It is determined which of the invalid patterns. This analysis changes the value of C _m (t).

At the same time, using the II and DI shows the variation of the data amount, and calculates a value of C m _(t) whether fluctuates and after variation C _{m (t).} When C _m (t) varies, encoding is performed for C1 to C14 shown in FIG. 5 to indicate the amount of variation, and therefore analysis is also performed. For example, when II = 1 and DI = 0, it indicates that C _m (t) is increasing. When II = 0 and DI = 1, it indicates that C _m (t) is decreasing.

Data amount calculation unit 21, _{C m} varies by performing an analysis of the synchronization and JC1 and JC2, final _{C m} is determined.

The position calculation unit 23 shown in FIG. 1 calculates the staff or data position as follows, for example.
It is determined whether the number j (j = 1... P _{m, server} ) of each Payload field in the Payload Area is staff or data.
If (j × C _m (t)) mod P _{m, server} <C _m (t), that is, the remainder obtained by dividing Payload field j by C _m by the maximum stored data amount P _{m, server} and determines when the remainder thereof is smaller than the C _m is the data.
(J × C _m (t)) When mod P _{m, server} ≧ C _m (t), that is, a remainder obtained by dividing Payload field j by C _m by the maximum storage data amount P _{m, server} However, if the remainder is _Cm or more, it is determined as a staff member.

  Then, the coordinates corresponding to the number j of the payload field determined to be the staff are calculated, and the numbers j and the coordinates of the payload field determined to be the staff are output to the display unit 13. Thereby, the display unit 13 can display the stuff position map 51 and the stuff position list 54.

When C _m changes in the data amount calculation unit 21, the position of the staff is calculated using the changed C _m , and the payload field number j and coordinates are output to the display unit 13. Further, the position of the staff when C _m is the maximum value is calculated, and the position of the staff when C _m is the minimum value is also calculated, and the payload field number j and coordinates are output to the display unit 13.

The determination in the determination part 24 shown in FIG. 1 is performed as follows, for example.
When the data amount calculated by the data amount calculation unit 21 is 15168 bytes, the determination unit 24 acquires the position of the staff associated with the data amount 15168 bytes from the position reference table 25, and the position of the staff calculated by the position calculation unit 23 It is determined whether or not they match. Even if the position of the staff when C _m is the maximum value and the position of the staff when C _m is the minimum value, whether or not the position of the staff matches the position of the staff stored in the position reference table 25 is determined. Good.

  In the present embodiment, an example is described in which the position calculation unit 23 calculates the staff position, the position reference table 25 stores the staff position, and the display unit 13 displays the staff position. However, the present invention is not limited to this. . For example, the position calculation unit 23 may calculate the data position, the position reference table 25 may store the data position, and the display unit 13 may display the data position.

ここで、ｆ_{ｃｌｉｅｎｔ}はｃｌｉｅｎｔ ｂｉｔ ｒａｔｅを示し、Ｔ_{ｓｅｒｖｅｒ}はｆｒａｍｅ ｐｅｒｉｏｄ ｏｆ ｔｈｅ ｓｅｒｖｅｒ ｆｒａｍｅ ｏｒ ｓｅｒｖｅｒ ｍｕｌｔｉｆｒａｍｅを示し、ｃ_ｎはｎｕｍｂｅｒ ｏｆ ｃｌｉｅｎｔ ｎ−ｂｉｔ ｄａｔａ ｅｎｔｉｔｉｅｓ ｐｅｒ ｓｅｒｖｅｒ ｆｒａｍｅ ｏｒ ｓｅｒｖｅｒ ｍｕｌｔｉｆｒａｍｅを示す。 In the transmission unit, C _m is calculated as follows.
The amount of data of n-bit data (when n-bits are grouped together) reaching a certain frame period or multi-frame period is expressed as follows.

_{Here, f client} indicates a client bit _{rate, T server} indicates the frame period of the server frame or server multiframe, c n represents the number of client n-bit data entities per server frame or server multiframe.

ここで、ｆ_{ｓｅｒｖｅｒ}はｓｅｒｖｅｒ ｂｉｔｒａｔｅを示し、Ｂ_{ｓｅｒｖｅｒ}はｂｉｔｓ ｐｅｒ ｓｅｒｖｅｒ ｆｒａｍｅ ｏｒ ｍｕｌｔｉｆｒａｍｅを示す。 T _server is expressed as follows.

Here, f _server indicates server bit rate, and B _server indicates bits per server frame or multiframe.

Using the relationship of Formula D-5, Formula D-1 is expressed as follows.

GMP is adopted to store CBR (Constant Bit Rate) data in OPUk and LO ODUj (via ODTUk.ts).
In the GMP of OTN, mapping is basically performed by dividing in units of 8 bits (n = 8, C8). When m = 8 × Mbit, the target data amount becomes the total number of bits n × _{C n} to that divided by m. The storage target data amount _cm when divided in units of 8 bits in this way is expressed as follows.

Since the transmission as an integer value, an integer value of _{C m} and _C m (t).

The upper limit (ceiling) and lower limit (floor) that can be taken by the integer value are expressed as follows.

The integer value C _m (t) shown in Expression D-13 is expressed in hexadecimal and assigned to C1 to C14 shown in FIG. And the increase / decrease of the integer value _Cm (t) represented by Formula D-13 is allocated to II and DI as a code | symbol. For example, this sign indicates that C _m (t) is increasing when II = 1 and DI = 0. When II = 0 and DI = 1, it indicates that C _m (t) is decreasing. The amount to be increased or decreased is indicated by a combination of inverting the designated bits of C _m (t) represented by C1 to C14 shown in FIG.

  The present invention can be applied to the information communication industry.

11: JC byte extraction unit 12: calculation unit 13: display unit 21: data amount calculation unit 23: position calculation unit 24: determination unit 25: position reference table 51: stuff position map
52: Max button 53: Min button 54: Stuff Position List

Claims (9)

From OPU (Optical channel Payload Unit) frame of OH (Overhead), JC1 represents the first half of a data amount contained in Payload Area calculated by the transmission unit integer _{C m,} the second half and the settling of the integer values _{C m} JC byte extractor for extracting JC3 representing a CRC (Cyclic Redundancy Check) of JC2 and the representative of the variation condition of numerical _{C m} JC1 and the JC2 (11),
A data amount calculation unit (21) that calculates the amount of data included in the payload area of the OPU frame using JC1, JC2, and JC3 extracted by the JC byte extraction unit;
A position calculation unit (23) that calculates the position of staff or data stored in the Payload Area using the data amount calculated by the data amount calculation unit;
And the integer value _{C m} and the integer value staff or position reference table location data and is associated at the time of storing the data in the data amount based on the _{C m} in Payload Area (25),
An integer value C _m that matches the integer value C _m calculated by the data amount calculation unit is selected from the position reference table, and the position of the selected staff or data in the position reference table and the calculation of the position calculation unit are selected. A determination unit (24) for determining whether or not the staff or data position matches,
A display unit (13) for displaying the position of the staff or data calculated by the position calculation unit by mapping and displaying each coordinate on a map associated with the position of Payload Area, and displaying the determination result of the determination unit ;
A band control evaluation apparatus comprising: The data amount calculation unit further includes an upper limit value and a lower limit value of the data amount included in the Payload Area of the OPU frame, using the variation condition of the data amount included in JC1 and JC2 extracted by the JC byte extraction unit. Detect
The position calculating unit further calculates the position of the staff or data stored in the Payload Area using the upper limit value, and calculates the position of the staff or data stored in the Payload Area using the lower limit value. Calculate
The display unit further displays the position of the staff or data when the upper limit value calculated by the position calculation unit is used, and the staff or data when the lower limit value calculated by the position calculation unit is used. The band control evaluation apparatus according to claim 1 , wherein the position is displayed. The position calculation unit determines the position of the staff or data stored in the Payload Area by determining whether each Payload field obtained by dividing the Payload Area into the maximum storage data amount P _{m, server} is the staff or the data. To calculate
The said display part maps and displays the position of the staff or the data which the said position calculation part calculated on the map where each coordinate was linked | related with the said Payload field, The display of Claim 1 or 2 characterized by the above-mentioned. Bandwidth control evaluation device. The display unit further displays a number of a payload field determined by the position calculation unit as a staff, or displays a number of a payload field determined by the position calculation unit as data. bandwidth control and evaluation device according to 3. From OH of OPU frames, representing the variation condition of the second half and the integer value _{C m} for JC1, the integer value _{C m} represents the first half of the integer value _{C m} is the data amount included in Payload Area calculated by the transmission unit JC2 JC byte extraction procedure for extracting JC3 representing CRC of JC1 and JC2,
A data amount calculation procedure for calculating a data amount included in the Payload Area of the OPU frame using JC1, JC2, and JC3 extracted in the JC byte extraction procedure;
Using the data amount calculated in the data amount calculation procedure, a position calculation procedure for calculating the position of the staff or data stored in the Payload Area;
Referring to staff or position reference table position and is associated data when the stored data in the data amount based on the integer values C _m and the integer value C _m in Payload Area, calculated by the data amount calculation procedure An integer value _Cm that matches the integer value _Cm is selected from the position reference table, and the position of the staff or data in the selected position reference table and the position of the staff or data calculated in the position calculation procedure A determination procedure for determining whether or not match,
A display procedure for displaying the position of the staff or data calculated in the position calculation procedure by mapping and displaying each coordinate on a map associated with the position of Payload Area, and displaying the determination result in the determination procedure;
The band control evaluation method which has these in order. In the data amount calculation procedure, an upper limit value and a lower limit value of the data amount included in the Payload Area of the OPU frame using the variation condition of the data amount included in JC1 and JC2 extracted in the JC byte extraction procedure Detect
In the position calculation procedure, the position of the staff or data stored in the Payload Area is calculated using the upper limit value, and the position of the staff or data stored in the Payload Area is calculated using the lower limit value. Calculate
In the display procedure, the staff or data when the upper limit value calculated in the position calculation procedure is used and the staff or data when the lower limit value calculated in the position calculation procedure is used are displayed. The band control evaluation method according to claim 5 , wherein the position is displayed. In the position calculation procedure, the position of the staff or data stored in the Payload Area is determined by determining whether each Payload field obtained by dividing the Payload Area into the maximum storage data amount P _{m, server} is staff or data. To calculate
The said display procedure WHEREIN: The position of the staff or data calculated by the said position calculation procedure is mapped and displayed on the map in which each coordinate was linked | related with the said Payload field, The display of Claim 5 or 6 characterized by the above-mentioned. Bandwidth control evaluation method. The display procedure further includes displaying a payload field number determined as a staff in the position calculation procedure, or displaying a payload field number determined as data in the position calculation procedure. 8. The bandwidth control evaluation method according to 7 . The JC byte extraction procedure, the data amount calculation procedure, the position calculation procedure and the display procedure according to any one of claims 5 to 8 , or the JC byte extraction procedure, the data amount calculation procedure, the position calculation procedure, the determination procedure and the display procedure. , A bandwidth control evaluation program to be executed by a computer.

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