JPH01300644A - Communication system - Google Patents

Abstract

PURPOSE:To easily store a data relating to a connection time by measuring a connection time by normal call connection. CONSTITUTION:A digital exchange 2 is connected to a digital system network 1 in an ISDN communication system and a terminal equipment 3 corresponding to the ISDN is connected to the exchange 2. The information relating to the call time at the calling is included in a call request signal and sent to the incoming side, while the information relating to the call time is decoded from a call request signal sent from the caller side at the incoming of call and the information relating to the arrival reaching the incoming side of the call request signal is held and the difference between the call time and the arrival time is calculated from the information. Thus, the connection time is measured by the normal call connection without making a simulated call by using a simulating call test equipment. Thus, the data relating to the connection time is easily stored.

Description

Detailed Description of the Invention [Object of the Invention] (Industrial Application Field) The present invention relates to a communication system compatible with, for example, I5DN.

(Prior Art) Connection quality in a communication network is often evaluated by waiting time in a waiting system such as a packet switching system, and by call loss rate in a real-time system such as a circuit switching system. However, even in the real-time system, when the number of relay nodes increases or when the detour route becomes long, the connection time increases significantly, so the connection time becomes an important factor for indicating the connection quality of the line.

Conventionally, such connection time measurements have been carried out using a pseudo call testing device. In other words, the time from when a call is made using the pseudo-call testing device until the ringback tone is returned to the calling party by the called party is measured and calculated using a counter within the pseudo-call testing device. be.

However, with this conventional connection time measurement method, it is necessary to set up a pseudo-call testing device and make a pseudo-call for measurement, so a large amount of data needs to be accumulated depending on each situation. It is extremely difficult to do so.

For this reason, it is extremely difficult to create a database of connection times and use statistical processing to predict congestion status or change routing at an early stage, which has been strongly desired in recent years.

(Problems to be Solved by the Invention) As described above, the conventional connection time measurement method uses a dedicated device such as a pseudo call test device, which makes it difficult to accumulate data. It is difficult to predict congestion conditions early and change routing.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a communication system that can extremely easily accumulate data regarding measurement times.

[Structure of the Invention] (Means for Solving the Problems) This invention includes a call request signal that includes information regarding the calling time at the time of a call and sends it to the called party, and a call request signal sent from the calling party when the call is received. It decodes the information regarding the transmission time from the signal, holds information regarding the arrival time when the call request signal reaches the called party, and calculates the difference between the transmission time and the arrival time from this information.

(Function) According to the present invention, connection time can be measured by normal call connection without making a pseudo call using a pseudo call test device, so data regarding connection time can be accumulated extremely easily. I can do it.

(Example) Hereinafter, the present invention will be described in detail with reference to the drawings.

FIG. 1 is a schematic diagram of an I5DN communication system according to an embodiment of the present invention.

In the communication system shown in the figure, digital exchanges 2 are connected to a digital network 1, and terminals 3, 3, . . . that are compatible with I5DN are connected to these exchanges 2.

FIG. 2 is a block diagram showing the configuration of the exchange 2. As shown in FIG. Note that the exchange 2 has a clock whose time is relatively consistent within this communication system.

In the exchange 2 shown in the figure, a time sending device 6, a time keeping device 7, and a message decoding device 8 are connected through a communication interface 5 that interfaces with a transmission line 4 derived from a network 1.

When a call request is received from the terminal 3 connected via the communication interface 9, the time sending device 6 transmits the "
Information regarding the origination time of the call is entered in the 4-user/user information in the "Call setting" message. When there is an incoming call request from the network 1 side, the time keeping device 7 records the incoming call at the time of this incoming call request. Holds information about time.

When there is an incoming call request from the network 1 side, the message decoding device 8 decodes information regarding the origination time of the incoming call from the "user-to-user information" in the "call setting" message for incoming call.

The time keeping device 7 and the message decoding device 8 calculate the difference between the incoming time and the outgoing time based on the information regarding the incoming time held in the time keeping device 7 and the information regarding the outgoing time decoded by the message decoding device 8. An arithmetic circuit 10 for calculating is connected, and the calculation results of this arithmetic circuit 10 are stored in a storage device 11.

Next, in such a communication system, the operation when a call request is made from the terminal 3a to the terminal 3b will be explained.

First, when a "call setup" message is sent from the terminal 3a to the exchange 2a, the time sending device 6 in the exchange 2a collects "user-to-user information" in the "call setup" message.
Information regarding the origination time of the call is inserted into the .

Subsequently, this "call setup" message is sent via network 1 to exchange 2b.

In the exchange 2b, when such a "call setting" message is received, the time keeping device 7 holds information regarding the arrival time, which is the time when this "call setting" message was received, and the message decoding device 8 stores this "call setting" message. Information regarding the calling time is decoded from the "User-to-User Information" in the "Call Setup" message.

After this, a "call setup" message is sent to terminal 3b,
Thereafter, normal call connection and communication are performed between the terminals 3aq and 3b.

In addition, in the exchange 2b, the arithmetic circuit 10 determines the difference between the incoming time and outgoing time based on the information regarding the incoming time held in the time keeping device 7 and the information regarding the outgoing time decoded by the message decoding device 8. The result is stored and accumulated in the storage device 11. At this time, the transmission location may also be stored.

In this embodiment, the thus accumulated calculation results, that is, data regarding connection times, are compiled into a database and statistically analyzed to perform early predictions of congestion states, changes in routing, and the like.

An example embodying such statistical processing will be shown below.

FIG. 3 is a schematic diagram of the 15DN communication system according to this embodiment.

In the communication system shown in the figure, exchanges 12 and 12 are connected by a route passing through a first relay exchange 13a and a route passing through a second relay exchange 13b,
A terminal 14 is connected to each exchange 12.

FIG. 4 is a block diagram showing the configuration of the exchange 12.

The exchange 12 shown in the figure includes an interface 5, a time sending device 6, a time keeping device 7, a message decoding device 8, a communication interface 9, an arithmetic device 10 . a routing setting device 15 that includes a storage device 11 and sets routing;
A routing table 16 having the latest routing table is provided.

Further, a personal computer 17 that exchanges data with the storage device 11 is connected to the exchange 12.

The personal computer 17 is a CPU 1 that centrally controls this device.
8. A statistical processing device 19 that performs statistical processing on the database according to instructions from the CPU 18; a message output device 20 that outputs a message based on the results of the statistical processing;
．． A routing change request device 21 is provided that rewrites the routing table 16 based on the results of statistical processing.

Next, the operation of statistical processing in the communication system configured as described above will be explained.

It is assumed that the connection time is measured as in the first embodiment described above, and the data is accumulated in the storage device 11 and compiled into a database.

In addition, in such a communication system, when a call is made from the terminal 14a to the terminal 14b, routing via the relay exchange 13a is set, and the threshold level of the waiting time for the waiting system is set to 30 seconds. Suppose that it is set to .

First, when the terminal 14a makes a call request to the terminal 14b, the exchange 12b measures the connection time according to the procedure in the above-mentioned embodiment, and if the connection time is 30 seconds or more, the call is terminated. At the same time, this result is stored in the storage device 11.

Thereafter, using the results stored in the storage device 11 as a database, when the number of abandoned calls exceeds a predetermined value, the personal computer 17 performs the following operations.

The CPU 18 activates the routing change request device 21, rewrites the routing table 16 in the exchange 12 from the route via the transit exchange 13a to the route via the transit exchange 13b, and causes the routing setting device 15 to notify the other exchanges. .

Moreover, even if the routing is not changed in this way, the message output device 2o may display the fact that a collision condition has occurred as an analysis result.

In this embodiment, such connection time statistics may be measured for about 30 days, for example, and the results may be analyzed. In this case, for example, if frequent I5 congestion occurs between certain destinations, processing may be performed to increase the transmission line capacity. Alternatively, the routing table may be fundamentally rewritten. In addition, if a congestion state occurs due to specific factors such as time, day of the week, location, etc., you can more effectively control the congestion state by rewriting 1; 2, 7 L-sol in advance according to these specific factors. It is possible to avoid it.

In the example of i:;,;':, the analysis is performed on the personal computer 17.
Performed by 1. As a result of the second result, the prescribed processing was carried out, but I4. -5 to be processed internally 1. But that's fine.

In addition, in this way, data bases, analysis functions, etc. are provided to each exchange, and data is sent from the storage device 1 of each exchange to a power point for distributed management; You may.

Furthermore, the exchange in these embodiments may belong to the user side or to the network side.

[Effects of the Invention] As described above, according to the present invention, connection time can be measured through normal call connection, so data regarding connection time can be accumulated extremely easily.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing a schematic configuration of a communication system according to an embodiment of the present invention, and FIG. 2 is a diagram showing the 1. FIG. 3 is a block diagram showing the configuration of a communication system according to another embodiment of the present invention, and FIG. 4 is a block diagram showing the configuration of the exchange board shown in FIG. 3. FIG. 2 is a block diagram showing the configuration of an exchange. ]...Network, 2...Exchange, 3...Terminal, 4...Transmission path, 5...Communication interface, 6
...Time sending device 1.7...Time keeping device, 8...
・Message decoding device, 9...communication interface,
10...Arithmetic device 1.11...Storage device, 12...
・Exchange, 13a,], 3 b...Relay exchange, 1
4...Terminal, 15... Routing setting device, 16
...Routing table, 517...PC,
18... CPU, 19... Statistical processing device, 20...
- Message output device, 21... Routing change request device. Applicant Toshiba Corporation Patent Attorney Sasa Suyama - Figure 2

Claims (1)

[Claims] Time sending means for including information regarding the calling time in a calling request signal and transmitting it to the called party when making a call; time decoding means for decoding the information about the calling time from the calling request signal sent from the calling party when receiving the call; time holding means for holding information regarding the arrival time at which the call request signal reached the called party at the time of incoming call; A communication system comprising calculation means for calculating a difference from the arrival time.