JPH10294721A - Error ratio measuring instrument and error-ratio measurement recording medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To measure an error ratio in a short time and to accelerate the quality display of data transmission by successively switching plural counters which have carry values that are mutually different and using a small carry value, when an error ratio increases. SOLUTION: Cyclic counters 11 to 13 count the number of bits which are synchronized with transmission data based on repeating cycles that are mutually different, and a counter selector 14 selects one from among plural these count results according to selector information and transfers a carry signal of the counter. An error-counting part 20 accumulates error bit numbers in digital data which is divided into plural samples, introduces a carry signal from the selector 14 and sends an error accumulation value at that time. Further, an error-ratio deciding part 30 calculates an error ratio by dividing an error accumulation value by a counted maximum value, show it and also switches it to a value that has a different repeating cycle, when the error accumulation value reaches a prescribed value.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an error rate measurement apparatus for measuring an error rate in a data transmission apparatus and displaying the transmission quality thereof, and an error rate measurement program recording medium.
In particular, the present invention relates to an error rate measurement device and an error rate measurement program recording medium capable of shortening the measurement time and performing high-speed quality display.

[0002]

2. Description of the Related Art FIG. 3 is a block diagram showing a general error rate measuring device. In general, in an error rate measuring device, count information synchronized with transmission data is introduced into a counter 101, and the number of bits is repeatedly counted to obtain a fixed cycle, and the number of error bits based on the error information is counted for each cycle. The counting is performed by the unit 102. This number of error bits is
The error rate calculation unit 103 needs to calculate the error rate by dividing by the above-mentioned fixed period, display the result on the display unit 104 to determine the transmission quality, and various devices based on such a request have been proposed. ing.

For example, there is a conventional example disclosed in Japanese Patent Application Laid-Open No. 1-112833. In this conventional example, the received data is divided into fixed sections, the number of errors occurring in each section is counted, and these are stored in order. Then, every time the series of error counting is completed, An error rate measuring device is described in which a fixed number of errors are added in order from a new one, and an error rate is determined from the result.

Here, the error rate of 1 × 10 ⁻⁶ is 1 × 10 ^−6.
Since there is one error in ^six samples,
For example, when displaying the quality of data transmission up to the error rate of 1 × 10 ⁻⁶ level, the error rate is calculated after counting the total number of bits of 1 × 10 ⁶ samples each time, and based on the result, the error rate is calculated. The quality label has been updated. Therefore, in order to update the quality indication in this way, it is necessary to repeatedly count a certain total number of bits at all times.

FIG. 4 is a time chart showing the operation of the above conventional example. In the time chart shown in FIG.
A plurality of samples 111 divided at regular intervals
In a series of data transmissions consisting of
The measurement of the error rate up to +3 times is specifically shown.
In this case, in the measurement of the error rate from the first time to the (m + 3) -th time, it is necessary to collect a fixed number of samples 111.
1 sequentially, n samples 111... 11
The measurement of the error rate in one group is repeatedly performed.

As described above, since the above-mentioned quality display is updated frequently by repeating the duplicate measurement, even when the transmission quality suddenly deteriorates in a short period of time from the steady state, the transmission quickly responds to the change. A new error rate can be determined quickly. On the other hand, data errors 112 may be concentrated in one place due to a transmission error in the burst mode. In this case, the sample 111 including such data errors 112 is collected from the second time onward through the (m + 2) th time. The feature is that the measurement is repeatedly performed every time up to.

[0007]

Accordingly, when the transmission quality of wireless transmission or the like is determined using the conventional error rate measuring device, there are the following problems.

First, since the above-mentioned quality indication is updated after always counting a certain total number of bits repeatedly, the counting of the total number of bits takes a long time. As a result, the quality indication updating period is inevitably lengthened. I do. Therefore, a considerable time difference occurs between the error rate displayed after the counting and the quality of the actual transmission section at that time.

Second, since a sample containing a data error is to be measured every time until later, even after the disappearance of the sample, the data error is constantly calculated even in the process of restoring the transmission quality. Therefore, the response is delayed with respect to such a recovery time. Particularly, in a measurement range with a low error rate, the number n of samples is increased, so that the response is significantly delayed.

Third, since a plurality of samples are collectively determined to obtain an error rate, it is necessary to add a certain number of errors even at the time of start-up until the radio line is stabilized. Does not output the calculation result of the error rate and does not display the quality. For this reason, at the time of starting up such a wireless line, the display function of the transmission quality cannot be effectively utilized.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and an error rate measuring apparatus and an error rate measuring apparatus capable of speeding up a quality indication of data transmission by measuring an error rate in a short time. It is intended to provide an error rate measurement program recording medium.

[0012]

In order to solve the above-mentioned problems, an error rate measuring apparatus according to the present invention measures an error rate in a short time by setting an error rate of a transmission error in digital data as an error rate. A plurality of period counters for counting the number of bits synchronized with transmission data based on different repetition periods, and selecting one of the plurality of period counters according to the selector information; A counter selector for transferring a carry signal, dividing the digital data into a plurality of samples, accumulating the number of error bits in each sample, and introducing a carry signal from the counter selector to obtain the error at that time. An error counting unit for transmitting the accumulated value; and a counter selected by the counter selector. An error rate determining unit that divides the error cumulative value by the maximum value of the counter to obtain the error rate, and sends the selector information to the counter selector when the error cumulative value reaches a predetermined value; And a display unit for displaying the error rate determined by the above based on the repetition period.

According to this error rate measuring device, the number of bits synchronized with the transmission data is counted based on the repetition periods different from each other, and one of the plurality of counting results is selected according to the selector information. The carry signal is transferred to accumulate the number of error bits in the digital data divided into a plurality of samples, and by introducing the carry signal, the accumulated error value at that time is sent out and the counting is performed. The error rate is calculated and divided by the obtained maximum value to calculate and display the error rate. When the error cumulative value reaches a predetermined value, the repetition cycle is switched to a different value. Therefore, the error rate can be obtained and displayed in a short time from a plurality of samples of the digital data with a short repetition period according to the state of occurrence of the transmission error.

In the error rate measuring device according to the present invention, when the error accumulated value is "0", the error rate determining section sends select information, and the counter selector repeats the current cycle counter for a longer time. It is configured to switch to a period counter having a period.

According to this error rate measuring device, if the transmission quality is in a steady state, the error rate can be measured with the shortest repetition period.

In the error rate measuring device according to the third aspect, if the error cumulative value is "10", the error rate determining section sends select information, and the counter selector repeats the current cycle counter for a shorter time. It is configured to switch to a period counter having a period.

According to the error rate measuring device, the error rate can be measured in a long repetition cycle in accordance with the deterioration of the transmission quality.

According to a fourth aspect of the present invention, there is provided an error rate measuring program recording medium which stores an error rate measuring program for measuring the error rate in a short time, with an occurrence rate of a transmission error in digital data as an error rate. Counting the number of bits synchronized with the transmission data based on a plurality of different repetition periods, selecting one of the plurality of repetition periods according to the selector information, transferring the carry signal, and By dividing the data into a plurality of samples, accumulating the number of error bits in each sample, and introducing the carry signal, the error accumulation value at that time is transmitted, and the maximum value in the selected repetition period is transmitted. , The error rate is obtained by dividing the accumulated error value. Accumulation value sends the selector information reaches a predetermined value, a configuration for displaying on the basis of the determined error rate to the repetition period.

According to the recording medium of the error rate measurement program, the computer executes the error rate measurement program capable of calculating and displaying the error rate in a short time with a short repetition cycle according to the occurrence state of the transmission error in the digital data. sell.

[0020]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a configuration diagram schematically showing an example of an embodiment according to the present invention. According to this embodiment, a counting means 10 for introducing count information and sending out a count value, an error counting section 20 for introducing error information in wireless transmission and sending out the number of errors, The error rate measuring device includes an error rate determining unit 30 that determines an error rate from the error rate and a display unit 40 that displays the determined error rate.

The counting means 10 includes a plurality of counters 11, 12, 13,... For counting the introduced count information by a plurality of different carry values, and a counter for selecting one from the count results in accordance with the selector information. And a selector 14. Each carry value, for example, the counter 11 is 1 × 10 ^4, the counter 12 is 1 × 10 ^5, The counter 13 is assumed to be 1 × 10 ^6. The selector information is information for instructing selection of a counter that minimizes the measurement time based on the state of occurrence of the error rate.

The error counting section 20 responds to the carry signal of the selected counter 11, 12, or 13 by
The error rate determination unit 30 determines the number of error bits obtained from the error information.
Has been sent to. The error rate determination unit 30 calculates the current error rate by dividing the number of error bits accumulated in the error counting unit 20 by the carry value of the selected counter 11, 12, or 13, and calculates the current error rate. The transition states of 11, 12, and 13 are determined, and the corresponding selector information is sent to the counter selector 14.

Next, the operation of the embodiment of the present invention will be described. When this circuit starts functioning, first, for example, the counter 11 is selected by the counter selector 14. At that time, 1 × which is the carry value of the counter 11
An index “4” of 10 ⁴ is displayed on the display unit 40, and the error rate ≧
This shows that 1 × 10 ⁻⁴ is measured by the counter 11.

Subsequently, when the data transmission is started, the counter 11 operates to count the number of 1 × 10 ⁴ bits, and the error counting section 20 introduces error information and outputs the error number. For example, if the number of errors is 0, 0 outputs, 1 to 9 errors, 1 output, and 10 or more, 10 errors are determined. It is sent to the unit 30.

The error rate judging section 30 calculates the error rate based on the number of errors introduced and the carry value of the counter 11, and sends selector information to the counter selector 14 based on each output introduced. That is, if the output is 0, “5” is displayed on the display unit 40 instead of “4” to indicate that 1 × 10 ⁻⁴ > error rate ≧ 1 × 10 ⁻⁵ , and to determine the error rate. The unit 30 sends out selector information specifying the counter 12.

The counter selector 14 switches the counter 11 to the counter 12 according to the selector information, and the counter 12 reduces the number of bits of the count information to 1 ×.
While counting up to 10 ⁵ , the error counting unit 20
Then, the number of transmission data errors is counted in the same manner as described above.

When the output becomes 0 again, "6" is displayed on the display unit 40 instead of "5", and 1 × 10 ^-5 > error rate ≧
1 × 10 ⁻⁶ and the error rate determination unit 3
0 sends new selector information to the counter selector 14. Therefore, as described above, the counter 12 is switched to the counter 13, and the counter 13 counts 1 × 10 ⁶ bits, and the error counter 20 counts the number of errors in the same manner as described above. .

Further, if the output becomes 0, "7" is displayed on the display unit 40 in the same manner as described above to indicate that 1 × 10 ^-6 > error rate, and the error rate determination unit 30 sends another new The selector information is sent to the counter selector 14. The counter selector 14 does not switch the counter 13 even when receiving this new selector information, selects the counter 13 as it is and counts 1 × 10 ⁶ bits. The number of errors is counted.

FIG. 2 is a diagram showing the state transition according to the embodiment shown in FIG. 1. FIG. 2 (a) shows each display state based on the transition process, and FIG. 2 (b) shows each transition state. This is to explain the process. In each display state shown in FIG. 2, or in the display unit 40, each of the above-mentioned "4", "5", "6" or "7" is displayed, and each transition process "0" to "4" is performed. Via "8", a state transition is made to one of the display states or to the other.

These nine transition processes “0” to “8” are:
The three counters 11 to 13 and the error counter 20
One error number output, ie, 0 output, 1 output or 1
It is obtained by combining 0 outputs. The above is a case where no error occurs in the received data.

Hereinafter, for example, a case where no error occurs in the received data will be described with reference to FIG. As described above, if the apparatus is in the display state in the initial state, transition to a new display state is performed via the transition process “0”, and then another new state is performed via the transition process “3”. To a new display state, and subsequently to another new display state via the transition process “6”, and by repeatedly performing the transition process “6”,
This display state is maintained.

Next, an example of the state transition when an error occurs in the received data will be described in detail. If at least one error is counted in the display state shown in FIG. 2, the apparatus stops at the initial display state by performing the transition process "1" or "2". That is, the present circuit uses the counter 11 to measure the error rate.

When one to nine errors are counted in the new display state, the transition state "4" is performed to stop at this new display state. 12, the error rate is measured. However, when 10 or more errors are counted in the new display state, the circuit transitions to the initial display state via the transition process “5”.
Is switched to the counter 11 to measure the error rate.

In this case, in a new display state,
When 1 to 9 errors are counted, 1
After counting all of the × 10 ⁵ bits, the transition process “4” is performed according to the result. However, since the transition process "5" is performed immediately when the number of errors reaches 10, the line quality status can be displayed in real time as compared with the conventional example.

In the display state, when the number of errors is one to nine, the display state is maintained as it is, and the counter selector 14 keeps selecting the counter 13, but when the number of errors reaches ten or more, the transition occurs. Since the display state is set by the process “8”, the counter 13 is set to the counter 1
Switched to 2.

In this case, the transition time in the display state is as follows. When the number of errors is one to nine, after counting 1 × 10 ⁶ bits, the transition process “7” is performed according to the result. When the number of errors reaches 10, the transition process “8” is immediately performed.

In the display state, when there is at least one error, the display state is changed to the display state by the transition steps "7" and "8". This transition is performed immediately when the number of errors becomes one, but the counter 13 is still selected by the counter selector 14 and the number of 1 × 10 ⁶ bits is counted. Therefore, the error rate can be measured and displayed in a short time in response to a change in the line condition.

According to the present invention, the computer controls the computer to count the number of bits synchronized with the transmission data based on a plurality of different repetition periods, and selects one of the plurality of repetition periods in accordance with the selector information. Select, and transmit the carry signal, divide the digital data into a plurality of samples, accumulate the number of error bits in each sample, and introduce the carry signal to obtain the error at that time. A cumulative value is transmitted, the error rate is calculated by dividing the error cumulative value by the maximum value in the selected repetition period, and the error rate is obtained.When the error cumulative value reaches a predetermined value, the selector information is transmitted. An error rate is displayed based on the repetition period.

In addition, the present invention is not limited to the above-described embodiment. Even if a plurality of hardware counters having fixed count values are used for the counter,
Alternatively, a software counter that switches and uses a plurality of different count values may be used, and it goes without saying that various changes can be made without departing from the spirit of the present invention.

[0040]

As described above, the error rate measuring device of the present invention has the following effects. First, by sequentially switching a plurality of counters having different carry values, a smaller carry value is used as the error rate increases.
Therefore, the error rate can be measured in a short time and the line quality can be displayed immediately. On the other hand, when the error rate decreases, a large count value is used, so that an optimal error rate count can be realized according to a change in the line condition.

Second, by switching a plurality of counters, the carry value is sequentially changed from a large carry value for a high error rate to a small carry value for a low error rate, and the update cycle of the error rate display is kept constant. Shorten in order instead of using numbers.
Therefore, not only when the transmission line is in a steady state,
This can also be useful for grasping the line status when starting up a wireless line.

Third, the measurement result of the error rate can be displayed step by step by using the display function based on the state transition. For this reason, the situation where the line quality changes every moment is displayed in order according to each quality level stage of the transmission data, so that it is easy to determine the situation where the line quality changes.

Therefore, it is possible to provide an error rate measuring device capable of speeding up the display of data transmission quality by measuring the error rate within a short time.

[Brief description of the drawings]

FIG. 1 is a configuration diagram schematically showing an example of an embodiment according to the present invention.

FIGS. 2A and 2B are diagrams showing state transitions according to the embodiment shown in FIG. 1. FIG. 2A shows each display state based on the transition process, and FIG. 2B explains each transition process. Is what you do.

FIG. 3 is a block diagram showing a general error rate measuring device.

FIG. 4 is a time chart showing the operation of the conventional example shown in FIG.

[Explanation of symbols]

 Reference Signs List 10 counting means 11, 12, 13 counter 14 counter selector 20 error counting unit 30 error rate judgment unit 40 display unit

Claims (4)

[Claims] An error rate measuring device for measuring the error rate in a short time by using the rate of occurrence of a transmission error in digital data as an error rate, the number of bits synchronized with the transmission data based on mutually different repetition periods. A plurality of cycle counters for counting the data, a counter selector for selecting any one of the plurality of cycle counters according to the selector information, and transferring a carry signal of the counter, and dividing the digital data into a plurality of samples. An error counting unit that accumulates the number of error bits in each sample and sends a carry error signal from the counter selector to transmit an error accumulated value at that time; and a maximum value of a counter selected by the counter selector. Divides the cumulative error value to obtain the error rate An error rate determination unit that sends the selector information to the counter selector when the accumulated error value reaches a predetermined value, and a display unit that displays the error rate determined by the error rate determination unit based on the repetition cycle. An error rate measurement device, comprising: 2. When the accumulated error value is “0”, the error rate determination section sends select information, and the counter selector switches the current cycle counter to a cycle counter having a longer repetition cycle. The error rate measurement device according to claim 1. 3. When the error accumulation value is “10”,
2. The error rate judging unit sends select information, and the counter selector switches the current cycle counter to a cycle counter having a shorter repetition cycle.
The error rate measurement device as described. 4. A recording medium on which is recorded an error rate measurement program for measuring the error rate in a short time, with the occurrence rate of transmission errors in digital data as an error rate, wherein The number of bits synchronized with the transmission data is counted, any one of the plurality of repetition periods is selected according to the selector information, the carry signal is transferred, and the digital data is divided into a plurality of samples. By accumulating the number of error bits in the samples of the above and introducing the carry signal,
The error accumulation value at that time is transmitted, and the error rate is obtained by dividing the error accumulation value by the maximum value in the selected repetition period, and the selector information is transmitted when the error accumulation value reaches a predetermined value. A computer-readable recording medium for an error rate measurement program, wherein the obtained error rate is displayed based on the repetition period.