JP2003258888A - Communication system, communication equipment, communication controller and communication method divided into connection setting stage and data communication stage - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To take appropriate measures to the congestion of communication equipment. <P>SOLUTION: A communication system comprises a plurality of pieces of communication equipment 1a to 1d and a communication controller 3. The communication equipment measure the number of connection signals to be transmitted and received during connection setting performed before starting data communication, and measures a data communication quantity to be transmitted and received during data communication. The communication controller 3 comprises a storage part storing the prescribed number of connection signals and a prescribed data communication quantity decided in consideration of the throughput of the communication equipment. The communication controller 3 compares the measured number of connection signals with the prescribed number of connection signals to judge congestion at a connection setting stage in the communication equipment on the basis of a comparing result, and compares the measured data communication quantity with the prescribed data communication quantity to judge congestion at a data communication stage in the communication equipment based on the comparing result. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a communication system and a communication device which are divided into a connection setting stage and a data communication stage for judging congestion of each of the plurality of communication devices connected to each other via a communication line. , A communication control device, and a communication method.

[0002]

2. Description of the Related Art In a voice communication system having a plurality of communication devices (for example, a switching device), the processes from the occurrence of one call to the termination are, for example, connection setting process, voice call process, call disconnection process. Can be divided into The connection setting process includes a call setting process (new call generation) and a communication path establishing process. When a large number of new calls occur here, the load on the communication device is mainly due to the connection setting process (that is,
The load is from the call setting process to the communication path establishing process), and the load on each communication device is small in the voice call process.

Therefore, as the load on the communication device, the load of the connection setting process may be mainly considered. This load can be determined, for example, by measuring the number of new call occurrences in the connection setting process. Further, the control method when the communication device is congested can be dealt with by suppressing the process in the connection setting process.

FIG. 10 is a diagram showing the structure of a conventional communication system. The communication system includes a plurality of communication devices 61a to 61d connected to each other via a communication line.
And communication terminal devices 62a to 62d connected to each communication device via a line, and a communication control device 63 for controlling each communication device.

The communication control device (operation system unit) has a function of receiving a notification (message) from the communication devices 61a to 61d or transmitting an instruction (command) to the communication devices 61a to 61d. Further, the communication system is connected to the communication control device 63, and the communication control device 6 is connected.
The input / output device 64 for outputting the message received in 3 to the worker and sending the command from the worker to the communication control device.
Have.

FIG. 11 is a flowchart showing a communication method in the communication system, and FIG. 12 is a communication device 6
It is a conceptual diagram for demonstrating the coping method at the time of congestion occurrence in 1a.

In the communication system configured as described above, when a call is made from the communication terminal device 62a to the communication terminal device 62c, a call start signal is transmitted and the signal is received via the communication devices 61a and 61c. The communication terminal device 62c sends the call response signal to the communication devices 61c and 6c.
It is sent to the communication terminal device 62a via 1a (call setting process S500).

The communication terminal device 62a is replaced by the communication device 6
The communication terminal device 62c that has transmitted the communication path establishment signal via 1a and received the signal transmits the response signal to the communication device 6
1c, 61a to the communication terminal device 62a. As a result, a communication path is established among the communication terminal device 62a, the communication device 61a, the communication device 61c, and the communication terminal device 62c (communication path establishing process S510).

After the communication path is established, a voice call is made between the communication terminal device 62a and the communication terminal device 62c.
This is the voice call processing (S520). When the call ends, a call disconnection signal is sent from the communication terminal device 62a to the communication terminal device 62c, and the communication terminal device 62c sends a response signal to the communication terminal device 62a via the communication devices 61c and 61a ( Call disconnection processing S530). This allows
The call ends.

Next, a method of measuring the load on the communication device 61a and a control method when congestion occurs in the communication device 61a will be described.

At the call setting processing stage, the communication device 61a measures the number of new calls and notifies the communication control device 63 (S54).
0). The communication control device 63 determines the congestion state of the communication device 61a based on the notified number of new calls, and outputs the determination result to the input / output device 64 (S550). If the worker determines that congestion has occurred, the input / output device 64
When a congestion control command is input to the communication device 61a (S560), it is sent to the communication control device 63. The communication control device 63 sends a congestion control command to the communication device 61a (S570). The communication device 61a controls congestion based on the congestion control command (control in call setting processing).
I do.

[0012]

However, the above-mentioned prior art has the following problems. Even in data communication of image data, character data, etc., the processing from the generation of one connection request (corresponding to a call) to the end thereof is, for example, a connection setting processing step, a data communication step, or a disconnection processing step. It can be divided into stages.

When a large number of connection requests are generated and a large amount of data (for example, in the case of moving image data communication) is exchanged between communication devices, in addition to the processing load in the connection setting processing stage, It is also necessary to consider the processing load at the data communication stage.

However, when the above-mentioned communication system for voice communication is applied to data communication of image data, etc., when the processing load of a certain communication device is large and it is in a congestion state, at the connection setting processing stage. It was not possible to determine whether the processing load of the above was large or the processing load at the data communication stage was large, and an appropriate measure for controlling the above congestion could not be taken.

Therefore, when data communication is being performed, the processing load at the connection setting processing stage of the communication device,
It has been desired to develop a communication system capable of separately judging the processing load at the data communication stage and taking appropriate measures when the communication device is in a congestion state.

The present invention has been made in order to solve the above problems, and in the case where data communication is being performed, the processing load at the connection setting processing stage of the communication device,
A communication system, a communication device, and a communication control device, which are divided into a connection setting stage and a data communication stage, which can be determined separately from the processing load in the data communication stage and can take appropriate measures when the communication device is in a congestion state. , For the purpose of providing a communication method.

[0017]

In order to solve the above problems, the present invention provides a method for determining congestion of each communication device among a plurality of communication devices connected to each other via a communication line.
The communication device measures the number of connection signals to be transmitted and received during connection setting performed before starting data communication with another communication device, and the communication device communicates with another communication device. In the data communication, the amount of data communication to be transmitted and received is measured, and the predetermined number of connection signals and the predetermined data communication amount determined in consideration of the processing capacity of the communication device are stored in the storage means, and the measured connection is made. The number of signals and the predetermined number of connection signals are compared, based on the comparison result, the congestion at the connection setting stage in the communication device is determined, and the measured data communication amount and the predetermined data communication amount are It is characterized in that the comparison is made and the congestion at the data communication stage in the communication device is judged based on the comparison result.

According to the present invention, unlike the prior art, it is not possible to judge only the processing load of the connection setting processing stage, and it is possible to judge the processing load of each of the connection setting processing stage and the data communication processing stage. It will be possible. As a result, the worker can perform appropriate congestion control separately in the connection setting processing stage and the data communication processing stage.

Further, according to the present invention, a first congestion control command, which is a command for controlling congestion at the connection setting stage for the communication device, is generated based on a result of congestion judgment at the connection setting stage in the communication device. A second congestion control command, which is a command for controlling the congestion at the data communication stage to the communication device, is generated based on the determination result of the congestion at the data communication stage in the communication device, and the second congestion control command is generated as the first congestion control command. On the basis of the second congestion control command, the congestion at the connection setting stage in the communication device can be controlled, and the congestion at the data communication stage in the communication device can be controlled based on the second congestion control command.

According to the present invention, unlike the prior art, even if the processing load of the communication device is large, only the congestion in the connection setting process can be controlled. Therefore, the congestion control in the connection setting process and the congestion in the data communication process can be prevented. It becomes possible to control. Therefore, the congestion control of the communication device can be more effectively performed as compared with the related art.

As the congestion control, when the first congestion control command is received, the number of connection signals transmitted and received by the communication device is reduced, and when the second congestion control command is received, the congestion control is performed. It is preferable to reduce the amount of data communication transmitted and received by the communication device.

[0022]

BEST MODE FOR CARRYING OUT THE INVENTION (Structure of Communication System) FIG.
It is a figure which shows the structure (henceforth a communication system) of the communication system divided into the connection setting stage and the data communication stage which are this Embodiment. The communication system includes a plurality of communication devices 1a, 1a connected to each other via a communication line.
b, 1c, 1d, communication terminal devices 2a, 2b, 2c, 2d connected to each communication device via a line, a communication control device 3 for controlling each communication device, and an operator. It has an input / output device 4 which sends the input information to the communication control device 3 and outputs the information sent from the communication control device 3. In this communication system, the communication device 1c includes
In addition to the communication terminal device 2c, for example, a server device 3c having a large calculation function for data communication is connected.

The communication terminal device 3 corresponds to, for example, a PC terminal device, a mobile terminal, a mobile phone or the like. Communication terminal device 3
Sends and receives a connection setting start signal and sends and receives a connection setting end signal.

Further, the communication terminal device 3 transmits / receives a data communication start signal, transmits / receives various data, and transmits / receives a data communication end signal. At this time, the data communication start signal, the data communication end signal, and the data signal include
Each includes signal source position information and signal destination position information.

(Communication Device) FIG. 2 shows communication devices 1a to 1d.
It is a figure which shows the structure of. The communication devices 1a to 1d specifically correspond to switching devices such as gateways. Each of the communication devices 1a to 1d is connected to the communication control device 3 so that various signals can be transmitted and received, and the communication devices are also mutually connected by a communication line, and various signals are transmitted from the communication terminal device 3. It is possible to transmit and receive various signals while relaying.

The communication devices 1a to 1d have a communication unit 11, a connection signal number measuring unit 12, a data communication amount measuring unit 13, and a congestion control unit 14. The communication unit 11 transmits and receives various signals and data to and from other communication devices and connected communication terminal devices.

Further, the communication section 11 of the communication devices 1a to 1d.
Receives a connection setting start signal, a connection setting end signal, and a data signal transmitted from another communication device or a connected communication terminal device. Then, the communication unit 11 determines that the connection setting start signal and the connection setting end signal among the received signals are
The data signal is sent to the connection signal number measuring unit 12, and the data signal is sent to the data communication amount measuring unit 13. Further, the communication unit 11 of the communication devices 1a to 1d sends a connection setting start signal and a connection setting end signal, which are scheduled to be transmitted, to the connection signal number measuring unit 12 before transmitting to another communication device or a connected communication terminal device. The data signal to be transmitted is sent to the data communication amount measuring unit 13. Then, for the signal to be transmitted, when the measurement operation by the connection signal number measuring unit 12 and the data communication amount measuring unit 13 is completed, the communication unit 11 reads each signal from each of the measuring units 12 and 13, and the destination device Send each signal to.

The operation of the communication unit 11 to send the data signal to the data communication amount measuring unit 13 is performed as follows. The communication unit 11 acquires the source position information and the destination position information included in the data communication start signal. The location information is, for example,
It is telephone number and address information. Then, the communication unit 11
When the data signal including the position information of the transmission source position information and the position information of the destination position information is received, the position information of the transmission source position information and the data signal including the position information of the destination position information are When it is scheduled to be transmitted, the data signal is sent to the data communication amount measuring unit 13. And the communication unit 1
1 continues to send the data signal to the data communication amount measuring unit 13 until it receives the data communication end signal including the position information described above.

The connection signal number measuring unit 12 measures the number of connection setting start signals and connection setting end signals transmitted and received before starting data communication with the connected communication terminal device and other communication devices. measure. Specifically, the connection signal number measuring unit 12 determines the number of connection setting start signals and the number of connection setting end signals sent from the communication unit 11 (hereinafter, the connection setting start signal The total number of connection signals and the number of connection setting end signals is called the connection signal number). Further, the connection setting start signal and the connection setting end signal are collectively referred to as a connection signal. Then, the connection signal number measuring unit 12 gives the communication device identification information to the measured number of connection signals and sends the information to the communication unit 11.

The data communication amount measuring unit 13 measures the amount of data communication to be transmitted and received during data communication with the connected communication terminal device or another communication device. In particular,
The data communication amount measuring unit 13 measures the data communication amount based on the data signal sent from the communication unit 11 every predetermined unit time. The data communication amount measuring unit 13 can measure the data communication amount in units of, for example, the number of packets and the number of bits. Then, the data communication amount measuring unit 13 provides the measured data communication amount with the identification information of the communication device, and sends it to the communication unit 11.

Based on the first congestion control command transmitted from the communication control device 3, the congestion control section 14 communicates with the communication devices 1a ...
While controlling congestion at the connection setting stage of 1d,
Based on the second congestion control command transmitted from the communication control device 3, the communication unit 11 is controlled so as to control the congestion at the data communication stage of the communication devices 1a to 1d.

Specifically, the congestion control unit 14 controls the communication unit 11 so as to reduce the number of times the connection setting start signal is transmitted and received, based on the first congestion control command. For example, the congestion control unit 14 controls the communication unit 11 to receive one of the two signals for the connection setting start signal transmitted. Further, for example, with respect to the transmitted connection setting start signal, two signals can be received, and only one of them can be transmitted. The connection setting end signal can be controlled similarly.

Further, the congestion control unit 14 controls the communication unit 11 so as to reduce the amount of data communication to be transmitted and received, based on the second congestion control command. Specifically, the congestion control unit 14 controls the communication unit 11 to receive, for example, one of two signals for the transmitted data communication start signal. As a result, the amount of data signals transmitted / received to / from the communication devices 1a to 1d can be reduced.

(Communication Control Device 3) FIG. 3 is a diagram showing the configuration of the communication control device 3. The communication control device 3 includes a communication device side reception unit 31, a first storage unit 32, a first congestion determination unit 33,
The second congestion determination unit 34 and the input / output device side transmission unit 35 are included.

The communication device side receiving section 31 is provided for each communication device 1a.
The number of connection signals and the amount of data communication transmitted from 1d are received. The first storage unit 32 stores a predetermined number of connection signals and a predetermined data communication amount which are determined in consideration of the processing capabilities of the communication devices 1a to 1d. Here, as an example, information specifying the number of connection signals is associated with a predetermined number X of connection signals, and information specifying the amount of data communication is associated with a predetermined amount Y of data communication. The correspondence table is stored in the first storage unit 32. An example of the correspondence table is shown in FIG. In the present embodiment, it is assumed that the processing capacities of the communication devices 1a to 1d are about the same.

The predetermined number of connection signals and the predetermined data communication amount can be determined as follows, for example. The guaranteed time of the communication device and the maximum processing capacity (maximum work amount that can be processed per unit time) for operating can be measured in advance. The unit time is the same as the unit time in the measurement operation by the connection signal number measuring unit 12 and the measurement operation by the data communication amount measuring unit 13.

Then, based on the maximum processing capacity, a connection setting processing capacity for transmitting / receiving a connection signal and a data communication processing capacity for transmitting / receiving a data signal are determined. In this case, it is determined in consideration of other processing of the communication devices 1a to 1d. The ratio of the data communication processing capacity to the connection setting processing capacity is determined, for example, in the design of the communication system.

Then, a predetermined number of connection signals is determined based on the determined connection setting processing capability, and a predetermined data communication amount is determined based on the determined data communication processing capability.

The first congestion judgment unit 33 compares the number of connection signals measured by the connection signal number measurement unit 12 with the predetermined number of connection signals in the correspondence table, and based on the comparison result, the communication devices 1a to 1d. Congestion in the connection setting process is determined. Specifically, for example, when the measured number of connection signals is larger, the first congestion determination unit 33 determines that the processing load in the connection setting process of the communication device is large and congestion in the connection setting process occurs. If the measured number of connection signals is smaller, it is determined that the processing load in the connection setting process of the communication device is not large and that the congestion in the connection setting process has not occurred.

The second congestion judgment unit 34 compares the data communication amount measured by the data communication amount measuring unit 13 with a predetermined contact data communication amount in the correspondence table, and based on the comparison result, the communication devices 1a ... Determine the congestion in the data communication process of 1d. Specifically, for example, the second congestion determination unit 34
If the measured data communication amount is larger, it is determined that congestion occurs in the data communication process because the processing load of the communication device in the data communication process is large, and the measured data communication amount is Is small, it is determined that the processing load of the data communication processing of the communication device is not large and that the congestion in the data communication processing has not occurred.

Then, the first congestion judgment unit 33 sends the judgment result to the input / output device 4 in association with the identification information of the communication devices 1a to 1d. Similarly, the second congestion judgment unit 34 sends the judgment result to the input / output device 4 in association with the identification information of the communication device.
Further, the communication control device 3 includes an input / output device side reception unit 36, a second storage unit 37, a congestion control command generation unit 38, and a communication device side transmission unit 39.

The input / output device side receiving section 36 receives the information on the congestion control in the connection setting process and the information on the congestion control in the data communication process input by the operator.

The second storage section 37 stores information indicating a congestion control method in the connection setting process and information indicating a congestion control method in the data communication process. In particular,
As an example, as a congestion control method in the connection setting process, for the connection setting start signal, of the two signals,
There are a congestion control method for controlling so as to receive one signal and a congestion control method for controlling so that only two signals are received and only one of the signals is received for the connection setting start signal to be transmitted.

As a congestion control method in the data communication processing, for example, there is a congestion control method in which the transmitted data communication start signal is controlled to receive one of the two signals.

The congestion control command generation unit 38, based on the input congestion control in the connection setting process and the information indicating the congestion control method in the connection setting process stored in the second storage unit 37, performs the congestion control. First to carry out method
Generate a congestion control command. Also, the congestion control command generator 3
8 is a second unit for executing the above-mentioned congestion control method based on the input of congestion control in the data communication process and the information indicating the congestion control method in the data communication process stored in the second storage unit 37. Generate a congestion control command. Then, the congestion control command generation unit 38 gives identification information of the communication device to the first congestion control command and the second congestion control command, and sends it to the communication device side transmission unit 39.

The communication device side transmitter 39 transmits the first congestion control command and the second congestion control command to the corresponding communication device based on the identification information of the communication device.

(Input / Output Device) The input / output device 4 has a function of outputting the judgment result sent from the first congestion judgment unit 33 and the second congestion judgment unit 34. In addition, the operator can input the effect of congestion control in the connection setting process and the effect of congestion control in the data communication process to the input / output device 4 by key operation or the like.

(Communication Method) A communication method by the communication system configured as described above will be described below.

(1) Transmission and reception of connection signals and data signals between communication devices In the communication system, transmission and reception of connection signals and data signals are performed between the communication devices. FIG. 5 is a sequence diagram showing the concept of the transmission / reception method. Communication device 1a and communication device 1
Transmission and reception with the c will be described as an example.

First, the communication terminal device 2a sends a connection setting start signal to the communication device 1a (start of connection setting processing). At this time, the connection setting start signal includes information about the destination server device 3c. In addition, each of the communication devices 1a to 1d
Are other communication devices of the communication system and communication terminal devices 2a to
2d, the position information of the server device 3c is held.

The communication device 1a detects the communication device 1c connected to the destination device 3c. Then, the communication device 1a
Transmits a connection setting start signal to the communication device 1c (S100). The communication device 1c sends a connection setting start signal to the destination server device 3c.

The server device 3c receives the connection setting start signal, and when the data communication is possible, sends the connection setting end signal through the communication device 1c (S105).
Send to the communication device 1a. When the communication device 1a sends a connection setting end signal to the communication terminal device 2a, the connection setting process ends.

The communication terminal device 2a sends a data communication start signal to the server device 3 via the communication device 1a and the communication device 1c.
c (S110, start of data communication process). Then, data communication is performed between the communication terminal device 2a and the server device 3c via the communication devices 1a and 1c (S1).
15).

When the data communication end signal is sent from the server device 3c to the communication terminal device 2a via the communication devices 1c and 1a (S120), the data communication process ends. The above processing is performed between each device in the communication system.

(2) Judgment of congestion in connection setting processing,
Judgment of Congestion in Data Communication Process FIG. 6 is a flowchart for explaining the judgment of congestion in the connection setting process and the judgment of congestion in the data communication process. A case of determining congestion in the communication device 1a will be described.

The correspondence table described above is, for example,
When a worker of the communication system inputs necessary information (a predetermined number of connection signals, a predetermined amount of data communication) to the communication control device 3, a correspondence table generating unit (not shown) generates a correspondence table, and the first storage It is stored in the unit 32.

The communication unit 11 of the communication device sends a connection signal transmitted / received to / from another communication device or communication terminal device to the connection signal number measuring unit 12 and a data signal to the data communication amount measuring unit 13 ( S200).

The connection signal number measuring unit 12 measures the number of connection setting start signals and connection setting end signals sent from the communication unit 11 every unit time (S205). Then, the connection signal number measuring unit 12 gives the measured connection signal number the identification information of the communication device 1 a and sends it to the communication unit 11. The data communication amount measuring unit 13 measures the data communication amount sent from the communication unit 11 every unit time (S210). The order of S205 and S210 may be first or may be performed in parallel. Then, the data communication amount measuring unit 13 gives identification information of the communication device 1a to the measured data communication amount,
It is sent to the communication unit 11.

The communication section 11 transmits the measured number of connection signals and the measured data communication amount to the communication control device 3 via the communication line. The measured number of connection signals and the measured data communication amount are received by the communication device side reception unit 31. Then, the measured number of connection signals is sent to the first congestion judgment unit 33, and the measured amount of data communication is sent to the second congestion judgment unit 34 (S220).

The first congestion judgment unit 33 reads the correspondence table from the first storage unit 32 and acquires a predetermined number of connection signals. Then, the first congestion determination unit 33 compares the measured number of connection signals with a predetermined number of connection signals, and determines whether or not the measured number of connection signals is larger (S230). If it is larger, in step S235, the first congestion determination unit 33
Determines that congestion has occurred in the connection setting process because the processing load of the communication device 1a in the connection setting process is large. If it is smaller, in step S240, the first
The congestion determination unit 33 determines that congestion has not occurred in the connection setting process, because the processing load of the connection setting process of the communication device 1a is not large.

Then, the first congestion judgment unit 33 sends the judgment result (whether or not there is congestion in the connection setting process in the communication device 1a) to the input / output device side transmission unit 35.

The second congestion judgment unit 34 reads the correspondence table from the first storage unit 32 and acquires a predetermined data communication amount. Then, the second congestion judgment unit 34 compares the measured data communication amount with a predetermined data communication amount, and judges whether the measured data communication amount is larger (S25).
0). If it is large, then in step S255, the second congestion determination unit 34 determines that congestion has occurred in the data communication process, assuming that the processing load of the communication device 1a in the data communication process is large. If small, step S
In 260, the second congestion determination unit 34 determines that the congestion in the data communication process does not occur, because the processing load of the communication device 1a in the data communication process is not large.

Then, the second congestion judgment unit 34 sends the judgment result (whether or not there is congestion in the data communication processing in the communication device) to the input / output device side transmission unit 35. Note that any of the processing from step S230 to step S240 and the processing from step S250 to step S260 may be performed first, or may be performed in parallel.

In the input / output device 4, the determination result by the first congestion determination unit 33 and the determination result by the second congestion determination unit 34 are output (S270).

By the operator of the communication system acquiring the output judgment result, it is determined whether the processing load in the connection setting process of the communication device 1a is large or the processing load in the data communication process of the communication device 1a is large. Can be judged. Accordingly, the worker can independently perform, on the communication device 1a, a measure for performing congestion control in the connection setting process and a measure for performing congestion control in the data communication process.

(3) Congestion Control Method for Communication Device FIG. 7 is a flow chart for explaining the congestion control method for the communication device. As an example, the input / output device 4
For the communication device 1a, it is output that congestion has occurred in the connection setting processing (the connection setting processing load is large) and congestion has occurred in the data communication processing (data communication processing load is large). Think

The operator inputs to the communication device 1a the effect of congestion control in the connection setting process and the effect of congestion control in the data communication process to the input / output device 4 by key operation or the like (S300). The input / output device 4 gives the identification information of the communication device 1a to the effect of congestion control in the connection setting process and the effect of congestion control in the data communication process. Then, these pieces of information are sent to the communication control device 3.

Input / output device side receiving section 36 of communication control device 3
Receives the message of congestion control in the connection setting process and the message of congestion control in the data communication process (S30).
5) Congestion control command generation unit 38 indicating the effect of congestion control in the connection setting process and the effect of congestion control in the data communication process.
Send to.

In step S320, the congestion control command generation unit 38 reads the information indicating the congestion control method in the connection setting process from the second storage unit 37, and commands the first congestion control command to execute the congestion control method. To generate.
At this time, the congestion control command generation unit 38 uses the communication device 1a.
Is given to the first congestion control command.

Similarly, the congestion control command generator 38
Information indicating the congestion control method in the data communication process is read from the storage unit 37, and a second congestion control command for instructing to execute the congestion control method is generated (S325).
At this time, the congestion control command generation unit 38 uses the communication device 1a.
Is given to the second congestion control command. Either step S320 or step S325 may be performed first or may be performed in parallel.

Then, the congestion control command generator 38 sends the generated first congestion control command and second congestion control command to the communication device side transmitter 39. The communication device-side transmitter 39 transmits the first congestion control command and the second congestion control command to the communication device 1a based on the identification information of the communication device 1a.

Upon receiving the first congestion control command and the second congestion control command, the communication unit 11 of the communication device 1a sends the congestion control unit 14 to the congestion control unit 14 (S330).

The congestion control unit 14 controls the congestion in the connection setting process of the communication device 1a based on the first congestion control command, and controls the congestion in the data communication process based on the second congestion control command ( S340). Specifically, the congestion control unit 14 controls the communication unit 11 based on the first congestion control command so as to reduce the number of times the connection setting start signal is transmitted and received. Similarly, the congestion control unit 1
4 controls the communication unit 11 to reduce the amount of data communication to be transmitted and received based on the second congestion control command. In the above description, the determination and control of congestion in the connection setting process and the data communication process are performed. Although the determination and control of congestion have been described, it is possible to determine and control the congestion of either one of the processes.

When the first congestion determination unit 33 and the second congestion determination unit 34 determine that the congestion in the connection setting process and the congestion in the data communication process are no longer occurring, a message to that effect is sent to the communication device side transmitting unit 39. You may make it transmit to the said communication apparatus via.

In this case, when it is sent to the congestion control unit 14 that congestion in the connection setting process has stopped, the congestion control unit 14 releases the congestion control in the connection setting process. Similarly, when it is sent to the congestion control unit 14 that congestion in the data communication process has stopped, the congestion control unit 1
4 releases the congestion control in the data communication processing.

When the first congestion judgment unit 33 judges that congestion has occurred in the connection setting process,
When the congestion determination unit 34 determines that congestion has occurred in the data communication process, the congestion determination unit 34 may automatically send a message to that effect to the congestion control unit 14. Then, the congestion control command generation unit 38 may generate the first congestion control command and the second congestion control command based on the fact that the congestion has occurred.

(Operation and Effect) According to the present embodiment, the connection signal number measuring unit 12 and the data communication amount measuring unit 13 are provided. Therefore, it becomes possible to measure the number of connection signals transmitted and received by the communication device to and from other communication devices and communication terminal devices. Further, it becomes possible to measure the amount of data signals transmitted and received by the communication device to and from other communication devices and communication terminal devices.

Then, the first congestion judgment unit 33 compares the number of measured connection signals with the predetermined number of connection signals determined in consideration of the processing capacity of the communication device, and in the connection setting processing stage of the communication device. You can judge whether the processing load is large,
If it is large, it can be determined that congestion has occurred in the connection setting process. Similarly, the second congestion determination unit 34 compares the measured data communication amount with the predetermined data communication amount determined in consideration of the processing capacity of the communication device, so that the processing load at the data communication processing stage of the communication device is reduced. Whether it is large or not can be determined, and if it is large, it can be determined that congestion has occurred in the data communication process.

Therefore, unlike the prior art, it is not possible to judge only the processing load of the connection setting processing stage, and it is possible to judge the processing load of each of the connection setting processing stage and the data communication processing stage. As a result, the worker can perform appropriate congestion control separately in the connection setting processing stage and the data communication processing stage.

Further, in the present embodiment, the congestion control command generator 38 generates the first congestion control command and the second congestion control command. Then, the congestion control unit 14 can control the congestion in the connection setting process based on the first congestion control command, and can control the congestion in the data communication process based on the second congestion control command.

As a result, unlike the prior art, even if the processing load of the communication device is large, only the congestion in the connection setting process cannot be controlled, and the congestion control in the connection setting process and the congestion control in the data communication process are possible. Becomes Therefore, the congestion control of the communication device can be more effectively performed as compared with the related art.

(Modification 1) In the present embodiment, the processing capacities of all the communication devices are considered to be equal, but if they are different, in the correspondence table stored in the first storage unit 32 described above. The predetermined number of connection signals X and the predetermined amount of data communication Y are different for each of the communication devices 1a to 1d.
In such a case, it is possible to do as follows.
That is, the correspondence table as shown in FIG. 4 stored in the first storage unit 32 is associated with the identification information of each of the communication devices 1a to 1d, and is provided for each of the communication devices 1a to 1d.

Then, in the above-mentioned flowchart, in step S230, the first congestion judgment unit 33
Reads a correspondence table corresponding to the identification information of the communication device given to the measured number of connection signals, and acquires a predetermined number of connection signals. Similarly, in step S250,
The second congestion determination unit 34 reads a correspondence table corresponding to the communication device identification information given to the measured data communication amount, and acquires a predetermined data communication amount. Other than this,
This is the same as each process of the flowchart shown in FIG.

(Modification 2) In the first embodiment, the communication device has a transmission processing capability that is a processing capability for transmitting a connection signal and a data signal, and a communication device has a reception capability that is a processing capability for receiving a connection signal and a data signal. It was considered equivalent to processing capacity.

However, there are cases where the transmission processing capability and the reception processing capability are different. In such a case, the following can also be done.

The connection signal number measuring unit 12 of the modification 2 separately measures the number of connection signals to be transmitted and the number of connection signals to be received. The data communication amount measuring unit 13 separately measures the data communication amount to be transmitted and the data communication amount to be received.

Then, in the correspondence table stored in the first storage section 32, a predetermined number of connection signals for transmission, a predetermined number of connection signals for reception, a predetermined data communication amount for transmission, and a reception data It includes a predetermined amount of data communication. Then, the first congestion determination unit 33 determines the congestion determination in the connection setting process separately for transmission and reception. Similarly, the second congestion determination unit 34 determines the congestion determination in the data communication processing separately for transmission and reception.

In the second storage section 37, the congestion control method for connection setting processing for transmission, the congestion control method for connection setting processing for reception, the congestion control method for data communication processing for transmission,
A congestion control method for data communication processing for reception is stored.

Then, the congestion control command generation unit 38 generates the first congestion control command for transmission based on the congestion control method of the connection setting process for transmission, and based on the congestion control method of the connection setting process for reception. A first congestion control command for reception is generated, and a second congestion control command for transmission is generated based on the congestion control method for data communication processing for transmission, and a second congestion control command for data communication processing for reception is generated. Then, the second congestion control instruction for reception is generated.

Then, the congestion control section 14 reduces the number of connection signals to be transmitted to the communication section 11 based on the first congestion control instruction for transmission, and based on the first congestion control instruction for reception, With respect to the communication unit 11, the number of connection signals to be received is reduced, and the communication unit 1
1, the number of data start signals to be transmitted is reduced,
Based on the reception second congestion control command, the communication unit 11 is caused to decrease the number of data start signals to be received.

Embodiment 2. In the communication system according to the second embodiment, the configurations of the communication devices 1a to 1d are different as follows. FIG. 8 illustrates the communication devices 1a to 2a of the second embodiment.
It is a figure which shows the structure of 1d. In the present embodiment, the same configurations and functions as those of the first embodiment are designated by the same reference numerals and the description thereof is omitted.

(Structure) The communication devices 1a to 1d acquire the CPU 50 that controls each unit and the processing amount of this CPU 50 per unit time, and when the processing load of the entire communication device is large based on this processing amount. Has a communication device congestion determination unit 51 that determines that congestion has occurred.

The communication device congestion judgment unit 51 holds information indicating a predetermined processing amount. The predetermined processing amount is determined, for example, based on the maximum processing capacity of the CPU 50 (the maximum work amount that can be processed per unit time).

(Communication Method) FIG. 9 is a congestion determination method in connection setting processing using the communication system according to the second embodiment.
It is a flowchart figure which shows the determination method of the congestion in a data communication process.

In step S400, the communication device congestion judgment unit 51 judges whether or not the communication device is congested. Specifically, the communication device congestion determination unit 51 uses the CPU 5
The processing amount per unit time of 0 is acquired. Then, the communication device congestion determination unit 51, the predetermined processing amount that is held,
The processing amount of the CPU 50 per unit time is compared, and the CPU
If the processing amount per unit time of 50 is larger,
In step S410, for the connection signal number measuring unit 12,
The number of connection signals sent from the communication unit 11 is acquired, and an instruction to start the measurement operation is given. At the same time, the data communication amount measurement unit 13 is acquired the data signal sent from the communication unit 11, and the measurement operation is started. Order to do. afterwards,
The processing from step S205 is performed.

On the other hand, when the processing amount of the CPU 50 per unit time is smaller, the process proceeds to step S400.

In the present embodiment, in addition to the effects shown in the first embodiment, only when the communication device congestion determination unit 51 determines that the communication device is congested, the connection signal number measuring unit 12, Measurement operation by the data communication amount measuring unit 13,
The determination operation by the first congestion determination unit 33 and the second congestion determination unit 34 is performed. Therefore, it is not necessary to perform the above-described measurement operation or determination operation when there is clearly no congestion, and the above-described measurement operation or determination operation is performed only when congestion is likely to occur. The resources of each device can be effectively utilized.

[0098]

As described above, when data communication is being performed, it is possible to separately judge the processing load at the connection setting processing stage of the communication device and the processing load at the data communication stage. Becomes Therefore, the communication device can be independently provided with measures such as congestion control in the connection setting process and measures such as congestion control in the data communication process. As a result, when congestion occurs in the communication device, it is possible to more effectively handle the congestion as compared with the related art.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration of a communication system according to a first embodiment.

FIG. 2 is a diagram showing a configuration of a communication device according to the first embodiment.

FIG. 3 is a diagram showing a configuration of a communication control device according to the first embodiment.

FIG. 4 is a diagram showing an example of a correspondence table stored in a first storage unit according to the first embodiment.

FIG. 5 is a sequence diagram showing a method of transmitting and receiving a signal between the communication devices according to the first embodiment.

FIG. 6 is a flowchart diagram for explaining a method of determining congestion of connection setting processing and congestion of data communication processing in the communication method according to the first embodiment.

FIG. 7 is a flowchart diagram for explaining a method of controlling congestion of connection setting processing and congestion of data communication processing in the communication method according to the first embodiment.

FIG. 8 is a diagram showing a configuration of a communication device according to a second embodiment.

FIG. 9 is a flowchart diagram for explaining a method of determining congestion of connection setting processing and congestion of data communication processing in the communication method according to the second embodiment.

FIG. 10 is a diagram showing a configuration of a conventional communication system.

FIG. 11 is a flowchart showing a conventional method of transmitting and receiving signals between communication devices.

FIG. 12 is a conceptual diagram for explaining a method of determining a congestion of a connection setting process and a congestion of a data communication process and a control method among the conventional communication methods.

[Explanation of symbols]

1a to 1d, 61a to 61d communication device 2a-2d, 62a-62d Communication terminal device 3c server device 3,63 Communication control device 4,64 I / O device 11 Communications Department 12 Connection signal number measurement unit 13 Data communication amount measurement unit 14 Congestion control unit 31 Communication device side receiver 32 First Storage 33 First Congestion Judgment Unit 34 Second Congestion Judgment Unit 35 Input / output device side transmitter 36 Input / output device side receiver 37 Second Storage Unit 38 Congestion control command generator 39 Communication device side transmitter 50 CPU 51 communication device congestion determination unit

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Nobuhiro Tanikawa             2-11-1, Nagatacho, Chiyoda-ku, Tokyo Stock             Ceremony company NTT Docomo (72) Inventor Haruo Mizumoto             2-11-1, Nagatacho, Chiyoda-ku, Tokyo Stock             Ceremony company NTT Docomo F term (reference) 5K030 GA13 HA08 HB28 HC01 JA07                       JA10 LB02 LC11 MA04 MB02                       MB09

Claims (11)

[Claims] 1. A communication system divided into a connection setting step and a data communication step of judging congestion of each communication device of a plurality of communication devices mutually connected via a communication line, wherein the communication device comprises: Between the other communication device and the first measuring means for measuring the number of connection signals to be transmitted and received during the connection setting performed before starting the data communication with the other communication device. Second measuring means for measuring the amount of data communication to be transmitted and received during data communication in, and storage means for storing a predetermined number of connection signals and a predetermined data communication amount determined in consideration of the processing capacity of the communication device. And comparing the number of connection signals measured by the first measuring unit with the predetermined number of connection signals, and determining the congestion at the connection setting stage in the communication device based on the comparison result.
A second method for comparing congestion of the data communication amount measured by the second measuring unit with the predetermined data communication amount and judging congestion of the communication device in the data communication stage based on the comparison result. A communication system divided into a connection setting stage and a data communication stage, characterized by comprising a congestion judging means. 2. A first congestion control command generating means for generating a first congestion control command, which is a command for controlling congestion at the connection setting stage for the communication device, based on the judgment result by the first congestion judging means. And a second congestion control command generation unit that generates a second congestion control command that is a command for controlling congestion at the data communication stage with respect to the communication device, based on a determination result by the second congestion determination unit, Congestion control means for controlling congestion at a connection setting stage in the communication device based on a first congestion control command, and congestion control means for controlling congestion at a data communication stage in the communication device based on the second congestion control command. The communication system according to claim 1, wherein the communication system is divided into a connection setting stage and a data communication stage. 3. The congestion control means reduces the number of connection signals transmitted and received by the communication device when receiving the first congestion control command, and when receiving the second congestion control command. The communication system according to claim 2, wherein the amount of data communication transmitted and received by the communication device is reduced. 4. A communication device divided into a connection setting stage and a data communication stage for communicating with a communication control device for judging congestion of communication devices connected to each other via a communication line. Between the first measuring means for measuring the number of connection signals to be transmitted and received during the connection setting performed before the data communication is started between the first communication means and the other communication device. It has a 2nd measurement means to measure the amount, and a transmission means to transmit the measured number of connection signals and the measured data communication amount to the communication control device, and the communication control device, the measured Based on the number of connection signals, determine the congestion of the connection setting stage, based on the measured data communication amount, the congestion of the data communication stage is determined, divided into the connection setting stage and the data communication stage Tadori Apparatus. 5. A receiving means for receiving a first congestion control command, which is a command for controlling congestion at the connection setting stage, and a second congestion control command, which is a command for controlling congestion at the data communication stage, And a congestion control means for controlling congestion at the connection setting stage based on the first congestion control command and controlling congestion at the data communication stage based on the second congestion control command. Item 4. A communication device divided into a connection setting step and a data communication step according to item 4. 6. The congestion control means reduces the number of connection signals to be transmitted / received when the first congestion control command is received, and transmits / receives data when the second congestion control command is received. The communication device according to claim 5, wherein the communication amount is reduced, which is divided into a connection setting stage and a data communication stage. 7. A communication control device divided into a connection setting stage and a data communication stage for judging congestion of each communication device of a plurality of communication devices mutually connected via a communication line, wherein the communication device is , The number of connection signals transmitted and received during connection setting performed before starting data communication with another communication device, while receiving the number of measured connection signals which is the result of measurement, A data communication amount transmitted and received during data communication with the communication device, a receiving unit that receives the measured data communication amount that is a result of measurement, and a predetermined connection signal determined in consideration of the processing capacity of the communication device. Storage means for storing the number and a predetermined amount of data communication, the measured connection signal number, the predetermined connection signal number is compared, based on the comparison result, to determine the congestion at the connection setting stage in the communication device First 1 congestion determining means, and a second congestion determining means for comparing the measured data communication amount with the predetermined data communication amount and determining the congestion at the data communication stage in the communication device based on the comparison result. A communication control device divided into a connection setting stage and a data communication stage. 8. A first congestion control command generation means for generating a first congestion control command, which is a command for controlling congestion at the connection setting stage for the communication device, based on the judgment result by the first congestion judgment means. And a second congestion control command generation unit that generates a second congestion control command that is a command for controlling the congestion at the data communication stage to the communication device based on the determination result by the second congestion determination unit. The communication device controls congestion at the connection setting stage based on the first congestion control command, and controls congestion at the data communication stage based on the second congestion control command. The communication control device according to claim 7, which is divided into a connection setting stage and a data communication stage. 9. A communication method divided into a connection setting step and a data communication step of judging congestion of each communication device of a plurality of communication devices mutually connected via a communication line, wherein the communication device comprises: A first measurement step of measuring the number of connection signals to be transmitted and received during connection setting performed before starting data communication with another communication device, and between the communication device and another communication device. A second measurement step of measuring the amount of data communication to be transmitted and received during the data communication in, and storing a predetermined number of connection signals and a predetermined data communication amount determined in consideration of the processing capacity of the communication device in the storage means. A step, the number of connection signals measured by the first measurement step,
Comparing the predetermined number of connection signals, based on the comparison result, the first congestion determination step of determining the congestion of the connection setting stage in the communication device, the data communication amount measured by the second measurement step, A connection setting step and a data communication step, comprising: a second congestion judgment step of comparing the predetermined data communication amount and judging the congestion of the data communication step in the communication device based on the comparison result. Separate communication method. 10. A first congestion control command generation step for generating a first congestion control command, which is a command for controlling congestion at the connection setting stage for the communication device, based on the judgment result of the first congestion judgment step. And based on the determination result by the second congestion determination step,
A second congestion control command generation step of generating a second congestion control command which is a command for controlling congestion at the data communication stage with respect to the communication device; and connection setting in the communication device based on the first congestion control command. 10. The connection setting stage according to claim 9, further comprising: And a communication method divided into data communication stages. 11. The congestion control step reduces the number of connection signals transmitted and received by the communication device when the first congestion control instruction is received, and when the second congestion control instruction is received, 11. The communication method according to claim 10, wherein the amount of data communication transmitted and received by the communication device is reduced.