JP2506164B2 - Measuring method of network characteristics - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a method for measuring network characteristics, for example, for measuring characteristics of a telephone network including a plurality of repeater exchanges.

[Conventional technology]

Normally, when communication is performed between terminals, communication is performed via an exchange, but when performing medium- to long-distance communication, communication is unspecified and is performed via a double number of exchanges. become. Therefore, even when communication is performed between the same terminals, the transmission characteristic changes each time.

Conventionally, such measurement of transmission characteristics between terminals (connection, loss, quality, etc.) has been performed by the method shown in FIG. In FIG. 3, 10 is a telephone network, 20 is a measuring terminal equipped with a center and a receiver, 30 is the measuring terminal 20 connected to a control line 30a.
It is a center that is controlled via.

That is, in this method, the center 30 sends a test command to, for example, two measuring terminals 20 at each time slot, and the measurement is performed between the two points. Then, after the measurement was performed a plurality of times, the center 30 collected the measurement results from each measurement terminal 20.

[Problems to be Solved by the Invention]

However, in the conventional measurement method as described above, it is necessary to provide the control line 30a between each measurement terminal 20 and the sensor 30, and it is impossible to perform the measurement between the terminals without the constraint line 30a. Met.

Therefore, it is possible to perform measurement by providing an independent measurement schedule in each measurement terminal 20 without providing the control line 30a, but in this case, the callee may collide, and the congestion of the network may occur. There was a problem in that a terminal for exclusive use of incoming calls had to be provided separately because it became a busy state even though it did not occur.

It is also possible to fix one measuring terminal 20 as a transmitting station, measure all other measuring terminals 20, and then sequentially change measurement by changing the transmitting station. Since the measurement cannot be performed, there is a problem that it takes a lot of time for the measurement.

The present invention has been made to solve the above problems, and an object of the present invention is to obtain a network characteristic measuring method capable of efficiently measuring the network characteristic in a short time without providing a dedicated control line. And

[Means and Actions for Solving Problems]

A method for measuring network characteristics according to the present invention divides a measurement schedule into a plurality of time slots according to a reference time, and when there is a plurality of measurement terminals to be measured in the one time slot, a plurality of measurement terminals are simultaneously measured. Measure. At that time, in order to prevent the congestion of the measurement activation that multiple measurement terminals measure to the same measurement terminal, the measurement terminal number to be activated is set to the opposite measurement terminal number, and the opposite measurement terminal is set to wait for incoming call. To do.

In the measurement schedule, the plurality of time slots are used to set up between all the measurement terminals to be measured. Then, the measurement schedule is sent to each measurement terminal together with the reference time.

〔Example〕

FIG. 1 is a diagram for explaining an embodiment of a method for measuring network characteristics of the present invention. In FIG. 1, 10
Is a telephone network as a measured network, 200 is a sender,
A measurement terminal which has a receiver and a measurement schedule clock built therein and performs measurement according to the measurement schedule, and 300 is a center which sends the measurement schedule to the measurement terminal 200 and collects the measurement results after the measurement is completed.

 Next, the measurement procedure will be described.

First, before the measurement is started, the relevant part of the measurement schedule and the reference time as shown in FIG. 2 are sequentially transmitted from the center 300 to the respective measurement terminals 200 at points A, B, C and D via the telephone network 10. And send it out. In FIG. 2, each communication shows a point facing each other, and X shows waiting for an incoming call.

Next, the measurement is started at the activation time of the transmitted measurement schedule, and in the time slot 1, the measurement between points A and B and between points C and D is performed. After that, the measurement of time slots 1 to 6 is similarly repeated a plurality of times. Then, when the measurement is completed, the measurement results are sequentially sent from each measurement terminal 200 to the sensor 300.

That is, in the measuring method of the present invention, each measuring terminal 200
Since the measurement is performed according to the measurement schedule transmitted from the center 300 via the telephone network 10 in advance, the measurement can be performed efficiently in a short time without causing congestion. In addition, since the measurement schedule may be sent to each measurement terminal 200 before the measurement starts, the telephone network 10
It is possible to send the data through the control line and there is no need to use a dedicated control line.

In the above embodiment, the measurement is performed at four points A, B, C, and D, but the measurement schedule may be changed and the measurement may be performed at five points or more.

Needless to say, the present invention can be applied not only to the telephone network 10 but also to measurement of characteristics between measurement terminals connected via a network under measurement. Furthermore, in FIG. 1, the telephone line for transmitting the measurement signal is shared with the telephone line for transmitting the measurement schedule from the center, but providing the telephone line separately does not impair the effect of the present invention.

〔The invention's effect〕

As described above, the present invention divides into a plurality of time slots according to the reference time, and when there is a plurality of measurement terminals to be measured in one time slot, the measurement between the plurality of measurement terminals is performed simultaneously. At that time, in order to prevent congestion of the measurement start when multiple measurement terminals measure to the same measurement terminal, set the opposite measurement terminal number to the starting measurement terminal and set the waiting measurement for the opposite measurement terminal. To do.

In the measurement schedule, the plurality of time slots are used to set up between all the measurement terminals to be measured. Then, since the measurement schedule is sent to each measurement terminal together with the reference time, there is no need to provide a control line,
There is an effect that it is possible to efficiently perform measurement in a short time without causing congestion due to the measurement schedule.

[Brief description of drawings]

FIG. 1 is a diagram for explaining an embodiment of a network characteristic measuring method of the present invention, FIG. 2 is a diagram showing an example of a measurement schedule, and FIG. 3 is an example of a conventional network characteristic measuring method. FIG. In the figure, 10 is a telephone network, 200 is a measuring terminal, and 300 is a center.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Nobuo Furuya 5-1027 Minamiazabu, Minato-ku, Tokyo Within Anritsu Co., Ltd. (56) Reference JP-A-63-166323 (JP, A)

Claims (1)

(57) [Claims] 1. A network characteristic between four or more measurement terminals having a measurement function connected to a measured network is measured according to a measurement schedule instructed by a center,
In the method of measuring network characteristics in which the measurement result is collected by the center, dividing the measurement schedule into a plurality of time slots, setting a reference time as a reference for each time slot, and When there are a plurality of measurement terminals to be measured, the slot is a step of setting the measurement terminal number of the measurement terminal to be activated to the measurement terminal of the opposite side, and the waiting of the incoming call to the measurement terminal of the opposite side, the measurement schedule and the reference time. From the center to the respective measurement terminals via the network to be measured, each of the measurement terminals starts measurement at an activation time determined by the measurement schedule and reference time, and performs measurement according to the measurement schedule. And sending the measurement result to the center after completion of the measurement of the network characteristics. Law.