JP2820130B2 - Network Efficiency Measurement Tool for Asynchronous Transfer Mode Communication - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an asynchronous transfer mode (Asynchronous Transfer Mode).
The present invention relates to a network efficiency measurement tool in ATM communication for measuring the cell flow rate of an asynchronous transmission mode cell in ATM communication and measuring network efficiency.

[0002]

2. Description of the Related Art In recent years, it has been expected that Internet protocol groups (hereinafter, TCP / IP) are used as high-bandwidth communication means as multimedia communication capable of handling all of hi-fi sound, still images, and moving images. But,
When TCP / IP is used on the data link layer protocol of the asynchronous transmission mode (ATM), there is a problem that the throughput of communication efficiency is extremely deteriorated without utilizing the high band communication characteristics. This is because TCP / IP was developed in the computer field, while Asynchronous Transfer Mode (ATM) was developed in the optical communication field, and it is well considered that both can be used in combination. Not due to not. Specifically, for example, cell discard or insufficient transfer speed in data link control in the asynchronous transfer mode, or the IP datagram size, TCP segment size, TCP / IP
This is due to insufficient transfer speed in TCP / IP protocol control due to a small buffer size for use.

Hitherto, in asynchronous transfer mode communication (ATM communication), there has been proposed a quality information collecting technique for collecting information on communication quality in order to improve the communication quality. However, the conventional quality information collecting technique in ATM communication has been configured by providing an asynchronous transfer mode communication quality information collecting system in or near a computer for a cell flow rate measuring means for measuring a cell flow rate.

As a conventional ATM communication quality information collecting technique of this kind, there is, for example, a system disclosed in Japanese Patent Application Laid-Open No. Hei 5-136803. In the same publication, in a system in which a plurality of home interior layers and an asynchronous transmission mode switch are connected via a subscriber line, a cell flow rate measurement processing unit for measuring a cell flow rate is provided in or near a subscriber's home apparatus. Describes an ATM communication quality information collection system that measures the cell flow rate in a subscriber line and manages the communication quality of cells.

[0005]

However, the above-mentioned conventional ATM communication quality information collecting technique has a problem that there is no means for acquiring information between a data link layer and a TCP / IP protocol layer in network software. The reason is that since TCP / IP has become a standard network protocol of a commercially available OS, it is black boxed from the user side, and the contents of TCP / IP cannot be known without relying on the OS standard support tool. This is because necessary information cannot be obtained. Also, in the above-mentioned conventional technique, the purpose is only to obtain the quality information on the transmission path of the ATM communication, and the communication quality information in TCP / IP is not measured.

[0006] An object of the present invention is to provide a transport system in a basic reference model of a cooperative computer system to which TCP / IP belongs.
ATMOption Layer belonging to Datalink Layer (data link layer) which is a lower layer of ort Layer / Network Layer
er5 (hereinafter abbreviated as AAL5), the necessary basic throughput information is obtained, so that the maximum value of the throughput in AAL5, that is, the upper layer
An object of the present invention is to provide an ATM network efficiency measurement tool capable of acquiring throughput information in TCP / IP and measuring the communication efficiency performance of TCP / IP in a black box.

[0007]

According to the present invention, there is provided a network efficiency measuring tool for asynchronous transmission mode communication which achieves the above object, and stores an asynchronous transmission mode cell for each cell which is a communication unit of asynchronous transmission mode communication. / O
A buffer, an I / O buffer control unit for performing various controls on the I / O buffer, and generating first statistical information for each control request, and accumulating IP datagrams for each maximum transfer unit of the data link layer An IP datagram buffer, an IP datagram buffer controller for performing various controls on the IP datagram buffer, and generating second statistical information for each control request;
Statistics that periodically receive the first statistical information generated by the / O buffer control unit and the second statistical information generated by the IP datagram buffer control unit, and generate time-series third statistical information An information generation unit, and a monitor control unit that displays the third statistical information generated by the statistical information generation unit on a display device.

According to a second aspect of the present invention, a network efficiency measurement tool for asynchronous transmission mode communication further comprises a statistical information storage unit for storing and accumulating the third statistical information generated by the statistical information generating unit. And

According to a third aspect of the present invention, there is provided a network efficiency measurement tool for asynchronous transmission mode communication, comprising:
The O-buffer control unit and the IP datagram buffer control unit transmit the first statistical information and the second statistical information at a certain period of time obtained by dividing a clock pulse of a computer to the statistical information generating unit. And the statistical information generation unit combines the received first and second statistical information, adds a time stamp of the timing at which each of the statistical information is received, and processes the statistical information into time-series information. And

According to a fourth aspect of the present invention, there is provided a network efficiency measurement tool for asynchronous transfer mode communication, wherein the I / O buffer control unit and the IP datagram buffer control unit control asynchronous transfer mode packets. A control unit connected to the control unit, wherein the components are incorporated in a data link layer of network software.

[0011]

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

FIG. 1 is a block diagram showing the configuration of an ATM network efficiency measurement tool according to one embodiment of the present invention.

As shown in the figure, the ATM network efficiency measurement tool of this embodiment includes an I / O buffer group 10 and an I / O buffer control unit 20 for acquiring ATM cell control statistical information, and an IP packet control statistical information. IP datagram buffer group 30 and IP datagram buffer control unit 40 for obtaining the ATM cell control statistical information and the IP packet control statistical information to generate time-series statistical information 50, a statistical information storage unit 60 for storing the generated time-series statistical information, and a monitor control unit 7 for displaying the time-series statistical information on a display device.
0. Then, the ATM packet communication control unit 10
0 through the network software. FIG. 6 shows a configuration example of network software in which the ATM network efficiency measurement tool of the present embodiment is incorporated. This embodiment is incorporated in AAL5 of the data link layer in FIG. In each drawing, only the characteristic configuration of the present embodiment is described, and the description of other configurations is omitted.

The I / O buffer group 10 includes a plurality of I / O buffers 11. The I / O buffer 11 has an ATM
Asynchronous transmission mode cells (ATM cells) are stored for each cell unit which is a communication unit by communication.

The I / O buffer controller 20 reads and writes data from and to the I / O buffer 11 based on a read / write request from the computer, counts the number of controls for each control request, and determines the count. Create ATM cell control statistics. FIG. 3 shows an example of the format of the ATM cell control statistical information. That is, when a write request is received from the computer, “1” is added to the value of the write execution count column of the ATM cell control statistical information 21. When a read request is received from the computer, "1" is added to the value of the read execution frequency column of the ATM cell control statistical information 21.

The I / O buffer control unit 20 periodically generates the ATM cell control statistical information 21 at a constant period obtained by dividing the clock pulse of the computer.
The number of executions of the various controls is notified to the statistical information generation unit 50. After performing this notification, the I / O buffer control unit 20
Resets the counter value of the ATM cell control statistical information 21 to zero, and counts the number of times of execution of the read / write processing again.

The IP datagram buffer group 30 includes a plurality of IP datagram buffers 31. The IP datagram buffer 31 stores IP datagrams for each maximum transfer unit of the data link layer.

The IP datagram buffer control unit 40
Based on a read / write request from the computer, data is read / written from / to the IP datagram buffer 31, the number of controls for each control request is counted, and IP packet control statistical information corresponding to the count is created. I
FIG. 4 shows an example of the format of the P packet control statistical information. That is, when a write request is received from the computer, “1” is added to the value of the write execution count column of the IP packet control statistical information 41. When a read request is received from the computer, “1” is added to the value of the read execution count column of the IP packet control statistical information 41.

The IP datagram buffer control unit 4
0 indicates the number of executions of various kinds of control of the IP packet control statistical information 41 at regular time intervals of a certain period obtained by dividing the clock pulse of the computer.
Notify 0. After performing this notification, the IP datagram control unit 40 clears the counter value of the AP packet control statistical information 41 to zero, and counts the number of times of execution of the read / write processing again.

The statistical information generating unit 50 periodically transmits the ATM cell control statistical information 21 from the I / O buffer control unit 20 at a fixed period obtained by dividing the clock pulse of the computer to the IP datagram buffer. The IP packet control statistical information 41 is received from the control unit 40. Then, the received ATM cell control statistical information 21 and the IP packet control statistical information 41 are combined, and a time stamp of the timing at which each information is received is added to be processed into time-series information. FIG. 5 shows an example of the format of the time-series statistical information generated in this manner.

The statistical information storage unit 60 includes a statistical information generating unit 5
The time series statistical information 51 generated by 0 is stored.
The accumulated time-series statistical information 51 is handled as history information. Thus, the number of samples can be increased in order to improve the reliability of the average number of executions of the processing per unit time.

The monitor control unit 70 includes a statistical information generation unit 50
Is displayed on the display device in real time. In addition to the number of times of execution of each processing of the ATM cell and the IP packet of the time-series total information 51, the processing data amount calculated from the number of times of execution of processing is displayed as necessary.

The ATM packet communication control unit 100 has an RF
Playload Format in C1483
Controls AAL5 type ATM packets according to LLC encapsulation of for Routed IP PDUs.

Next, the operation of this embodiment will be described with reference to FIG. 2 showing the flow of data in this embodiment.

First, in response to a control request from a computer (S201), the I / O buffer control unit 20
It controls the I / O buffer 11 and generates ATM cell control statistical information 21. Similarly, in response to a control request from the computer (S202), the IP datagram buffer control unit 40 controls the IP datagram buffer 31 and generates IP packet control statistical information 41.

Next, the I / O is periodically performed at a constant period obtained by dividing the clock pulse of the computer.
ATM cell control statistical information 21 from O buffer control unit 20
However, the IP packet control statistical information 41 is sent from the IP datagram buffer control unit 40 to the statistical information generating unit 50 (S203, S204). Then, the statistical information generation unit 50
In, time-series statistical information 51 is generated based on the obtained statistical information.

The generated time-series statistical information 51 is stored in the statistical information storage unit 60 (S205) and displayed on the display device in real time via the monitor control unit 70 (S206).

In this embodiment, the UNI shown in FIG.
Although the case where the AAL5 is incorporated in the data link layer of the network software in the X system computer has been described as an example, the network software in the PC system as shown in FIG. A
Needless to say, there is no problem if incorporated into AL5.

Although the present invention has been described with reference to the preferred embodiments, the present invention is not necessarily limited to the above embodiments.

[0030]

As described above, the network efficiency measuring tool in the asynchronous transmission mode communication of the present invention can be used for the ATM Option La belonging to the data link layer.
By incorporating it into yer5 (AAL5), AAL5
5 can be obtained, and the maximum value of the throughput of AAL5 can be obtained. As a result, there is an effect that the throughput information in the upper layer TCP / IP is acquired at the same time, and the performance of the communication efficiency of the TCP / IP in a black box can be measured.

Further, by obtaining the IP packet control statistical information, it is possible to provide information for analyzing the cause when the communication efficiency in TCP / IP is deteriorated.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of a network efficiency measurement tool according to an embodiment of the present invention.

FIG. 2 is a diagram showing a data flow in the embodiment.

FIG. 3 is a diagram showing a format example of ATM cell control statistical information.

FIG. 4 is a diagram showing a format example of IP packet control statistical information.

FIG. 5 is a diagram illustrating a format example of time-series statistical information.

FIG. 6 is a block diagram illustrating a configuration example of network software (protocol group) incorporating the present embodiment.

FIG. 7 is a block diagram illustrating a configuration example of another network software (protocol group) incorporating the present embodiment.

[Explanation of symbols]

 Reference Signs List 10 I / O buffer group 11 I / O buffer 20 I / O buffer control unit 30 IP datagram buffer group 31 IP datagram buffer 40 IP datagram buffer control unit 50 Statistical information generation unit 60 Statistical information storage unit 70 Monitor control unit

Claims (4)

(57) [Claims] An I / O for storing an asynchronous transmission mode cell for each cell which is a communication unit of the asynchronous transmission mode communication.
A buffer, an I / O buffer control unit that performs various controls on the I / O buffer, and generates first statistical information for each control request, and stores IP datagrams for each maximum transfer unit of the data link layer. An IP datagram buffer to perform various controls on the IP datagram buffer, and generate second statistical information for each control request.
A P datagram buffer control unit; and periodically receiving first statistical information generated by the I / O buffer control unit and second statistical information generated by the IP datagram buffer control unit; An asynchronous transmission mode communication, comprising: a statistic information generation unit that generates the third statistic information; and a monitor control unit that displays the third statistic information generated by the statistic information generation unit on a display device. Network efficiency measurement tool. 2. The network efficiency measurement in the asynchronous transmission mode communication according to claim 1, further comprising a statistical information storage unit for storing and accumulating the third statistical information generated by the statistical information generating unit. tool. 3. The I / O buffer control section and the IP datagram buffer control section perform the first statistical information and the second statistical information at a fixed period of time obtained by dividing a clock pulse of a computer. Notifying the statistical information to the statistical information generating unit, the statistical information generating unit compiles the received first and second statistical information, and adds a time stamp of a timing at which each of the statistical information is received. The network efficiency measurement tool in the asynchronous transmission mode communication according to claim 1 or 2, wherein the information is processed into the information. 4. The I / O buffer control unit and the IP datagram buffer control unit are connected to an asynchronous transfer mode packet communication control unit for controlling an asynchronous transfer mode packet, and each of the components is a data link of network software. 2. The method of claim 1 wherein the layer is incorporated into a layer.
A network efficiency measurement tool in asynchronous transmission mode communication according to claim 3.