JP3063845B2 - ATM communication system using communication rate management server - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an ATM communication system, and more particularly, to a communication rate management server.

[0002]

2. Description of the Related Art At the start of communication in a conventional ATM communication system, an SVC (Switt) which connects by designating a partner each time is started.
In a terminal connection of the ched Virtual Connection (VC) method, a VC (Virtual Chan-
nel) for data communication.

[0003]

However, when a terminal is connected to and sent data from a plurality of terminals, the terminal may be overloaded. For this reason, an error may occur in the reception of the terminal, causing loss of data or retransmission of data, which may prevent smooth data communication.

[0004] An object of the present invention is to provide an ATM in which stable data communication can be obtained even when data is transmitted from a plurality of terminals, the load on the receiving terminal is reduced, and the occurrence of data loss during reception is reduced. A communication system is provided.

[0005]

An ATM communication system using a communication rate management server according to the present invention is an SV communication system in which an ATM is specified and connected each time an ATM network communication starts.
A communication rate management server on an ATM network having means for managing terminal communication rate data as a database in an ATM communication system for executing data communication by the C method, means for determining a communication rate, and transmitting the communication rate data to a server. It is characterized by having a terminal including means for notifying and means for monitoring the load state of the terminal itself.

Means for managing the communication rate data of the terminal as a database include means for storing communication rate data notified by the terminal on the ATM network in a server, and means for the server to search for the requested communication rate data for the terminal. Means.

The means for notifying the server of the communication rate data further includes means for periodically notifying the server of the communication rate data of the terminal itself.

Further, the means for notifying the server of the communication rate data further includes means for notifying the server of the communication rate data each time a change in the communication rate data is recognized as a result of monitoring the load state of the terminal. .

The means for monitoring the load state of the terminal includes means for observing the usage rate of the CPU in the terminal,
It has means for observing the reception traffic status.

Further, the means for determining the communication rate includes:
It has means for acquiring, from a server, a communication rate set for a VC connected to another terminal.

Specifically, in the ATM communication system using the communication rate management server of the present invention, a communication rate management server is provided on the ATM network. The communication rate management server has a function of managing communication rate data sent from a terminal on the network and a function of publishing the managed communication rate data to the terminal.

Each terminal has a function of analyzing a communication rate suitable for its own reception performance. The terminal has a function of notifying the server of the analyzed communication rate data. Also,
It has a function to periodically notify (update) the communication rate to the server.

The terminal has a function of acquiring a communication rate set for a VC connected to another terminal from a server and setting a communication rate used for communication.

[0014]

Embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a configuration diagram showing a system environment of an ATM communication system according to the present invention. A in the present invention
The TM communication system is an AT constituting an ATM network.
An M switch 6, a communication rate management server 1 for managing communication rate data of terminals on the network, a database 2 belonging to the server, terminals 3, 4,
5. Each of the terminals 3, 4, and 5 has a communication rate value and an arbitrary address suitable for the reception performance of the terminal. Communication rate management server 1 and each terminal 3,
4 and 5 are physically connected via an ATM switch 6. The number of terminals and ATM switches connected to the ATM communication system of the present invention is not particularly limited.

FIG. 2 shows the communication rate management server 1 and the terminal 4
FIG. 3 is a diagram showing a form in which they are connected via an ATM switch. The communication rate management server 1 includes a database 12 for storing data relating to terminal addresses and communication rates,
Communication rate management unit 11 that manages the database 12
And an ATM communication device 13 for transmitting and receiving data to and from the terminal 4 via the ATM switch 6. The terminal 4 includes: an ATM communication device 45 that transmits and receives data to and from the communication rate management server 1 via the ATM switch 6;
ATM communication control unit 41 for controlling ATM communication device 45
It is composed of The ATM communication control unit 41 has a reception performance analysis unit 44 that monitors the status of the communication rate, and a communication rate control unit 42.

Next, the operation of the ATM communication system according to the present invention will be described with reference to the drawings. FIG. 3 is a diagram showing a connection with the communication rate management server 1 on the network when a terminal on the ATM network becomes communicable. Each terminal connects to the communication rate management server 1 and creates paths (Virtual Channels) 11, 12, and 13 as shown in the figure. The terminal transmits the address of the terminal itself and the communication rate data to the communication rate management server 1 as transmission data 14, 15, and 16 via the VC.

The communication rate management server 1 includes terminals 3, 4,
The data on the terminal address and the communication rate received from 5 are stored in the database 2.

Next, when the terminal 4 communicates with the terminal 3, as shown in FIG.
In order to acquire the communication rate set in C from the communication rate management server 1, a request is issued to the communication rate management server 1 by specifying the address A of the terminal 3. Upon receiving the request, the communication rate management server 1 searches the database 2 with the address A of the terminal 3 that has been sent, and stores the communication rate data corresponding to the address A of the terminal 3, for example, 50 Mbp here.
Returns s.

The terminal 4 is connected to the terminal 3 by the SVC method.
The communication rate received from the communication rate management server 1 is V
Set to C23. Accordingly, when data is transmitted from the terminal 4 to the terminal 3, the data can be transmitted at a communication rate suitable for the receiving capability of the terminal 3.

However, each terminal does not always maintain the same reception performance. The reception performance also changes depending on the communication load on the terminal, the usage rate of the built-in CPU, and the like. For example, as shown in FIG. 5, if the communication between the terminal 3 and the terminal 5 is newly performed in parallel with the communication between the terminal 3 and the terminal 4, the reception performance naturally decreases. Therefore, each terminal always analyzes the reception performance and determines a new communication rate. When the communication rates are changed in the VCs 31 and 32 shown in the figure, the communication rate data is transmitted to the communication rate management server 1 and the contents of the database 2 are updated.

Regarding the process of changing the communication rate on the terminal side,
This will be described with reference to FIG. The terminal 4 is an ATM communication device 4
5 transmits / receives data to / from an ATM line (VC). The ATM communication control unit 41 controls the ATM communication device 45. In the present invention, the ATM communication control unit 4
1, a reception performance analysis unit 44 having a CPU usage rate observation unit for always observing the usage rate of the CPU included in the terminal, a reception traffic observation unit for observing the reception traffic situation, and a communication rate control unit 42. I have. Reception performance analyzer 4
4 always monitors the load state of the terminal 4 and sends information on the monitoring result to the communication rate control unit 41. Communication rate control unit 41
Determines the communication rate value of its own terminal 4 to be low when the load is high and to be high when the load is low from the information of the monitoring result. The determined communication rate value transmits the communication rate data together with the address B of the terminal 4 to the communication rate management server 1 using the path (VC) 46 with the server, and updates the contents of the database 2.

When a data transmission request is sent to a certain terminal from the communication protocol, the communication rate control unit 42 sends a request for obtaining the communication rate of the terminal to the communication rate management server 1 using the VC 46. The communication rate data returned from the server is passed to the rate setting unit 43 and set in the connected VC 47. Then, the data requested by the protocol is transmitted using the VC 47.

When the terminal 5 communicates with the terminal 3, similarly, a request (33 in FIG. 5) for acquiring the communication rate data of the terminal 3 is issued from the communication rate management server 1, and the communication rate management server 1 The updated communication rate value of the terminal 3 (4
0 Mbps) (34 in FIG. 5). Terminal 5 is terminal 3
The connection is established by the SVC method, and the communication rate received from the server is set to VC (35 in FIG. 5).

FIG. 6 shows the operation of the communication rate management section 11 of the communication rate management server 1. As shown in the figure, the communication rate management server 1 stores the communication rate data value for each terminal in the database 2 if the received data is “notification of communication rate”. Also, as shown in the figure,
If the received data is a “communication rate data acquisition request”, the communication rate management server 1 searches the database 2 and returns the communication rate value of the corresponding terminal to the terminal that has requested acquisition.

[0026]

According to the communication rate management server of the present invention, A
According to the TM communication system, there is an effect that data communication can be performed at a communication rate that matches the reception performance of the terminal.
Therefore, it is possible to set a different communication rate for each terminal.

Since communication can be performed in accordance with the reception performance, the load on the receiving terminal can be reduced, and the occurrence of errors in reception and loss of data can be reduced, resulting in smooth communication.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing a system environment of an ATM communication system according to the present invention.

FIG. 2 is a diagram showing a form in which a communication rate management server and a terminal are connected via an ATM switch.

FIG. 3 is a diagram illustrating a connection with a communication rate management server on a network when a terminal on the ATM network becomes communicable;

FIG. 4 is a diagram for explaining an operation with a communication rate management server when a connection request between terminals is made after a terminal on the ATM network is in a communicable state.

FIG. 5 is a diagram illustrating an operation with a communication rate management server when a terminal on an ATM network is in a communicable state and after a connection between terminals, and when a request for connection between terminals is made;

FIG. 6 is a diagram illustrating an operation of a communication rate management unit of the communication rate management server.

[Explanation of symbols]

 1 Communication Rate Management Server 2, 52 Database 3, 4, 5 Terminal 6 ATM Switch 11, 12, 13, 23, 31, 32, 35 VC 14, 15, 16 Transmission Data 21, 33 Transmission Request 22, 34 Response Data 41 ATM communication control unit 42 Communication rate control unit 43 VC management unit 44 Reception performance analysis unit 45, 53 ATM communication device 46 VC with server 47 VC 51 with terminal 51 Communication rate management unit

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int. Cl. ⁷ , DB name) H04L 12/56 H04L 12/28

Claims (6)

(57) [Claims] 1. An ATM communication system for executing data communication according to an SVC method in which a connection is specified each time a communication is started in an ATM network, wherein the ATM network has means for managing communication rate data of a terminal as a database. A communication rate management server, comprising: a terminal including a communication rate management server, means for determining a communication rate, means for notifying the server of communication rate data, and means for monitoring a load state of the terminal itself. ATM communication system. Means for managing the communication rate data of the terminal as a database, means for storing communication rate data notified by a terminal on the ATM network in a server, and means for storing the communication rate data of the requested terminal in the server. 2. An ATM communication system using the communication rate management server according to claim 1, further comprising means for searching. 3. The ATM communication by the communication rate management server according to claim 1, wherein said means for notifying said server of said communication rate data further comprises means for periodically notifying said server of communication rate data of its own terminal. system. 4. A means for notifying the server of the communication rate data, further comprising a means of notifying the server of the communication rate data each time the communication rate data is changed as a result of monitoring a load state of the terminal. An ATM communication system using the communication rate management server according to claim 1. 5. The ATM by the communication rate management server according to claim 1, wherein the means for monitoring the load status of the terminal includes means for observing the usage rate of a CPU in the terminal, and means for observing the reception traffic status. Communications system. 6. The ATM communication system according to claim 1, wherein said means for determining a communication rate includes means for acquiring, from said server, a communication rate to be set for a VC connected to another terminal.