JP2882110B2 - Traffic measurement device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a network traffic measuring apparatus in which a packet signal in which the data length is described in header information is divided into several slots and transmitted.

[0002]

2. Description of the Related Art FIG. 4 is a block diagram showing a configuration of a conventional packet communication traffic measuring device. In FIG. 4, a packet detection unit 20 detects a packet signal from the transmission line 10. The byte counting unit 70 counts the number of bytes included in the packet signal. The address detection unit 50 detects an address from the packet signal, and transmits the detected address to the recording unit 60. The recording unit 60 has a counter for each address, and adds the number of bytes counted by the byte number counting unit 70 to the value of the counter corresponding to the address detected by the address detection unit 50.

[0003]

In the above-described conventional traffic measurement device for packet communication, address detection and packet byte counting are performed for all received packets. However, in a network according to the present invention in which one frame is divided into a plurality of packets and transmitted, the process of address detection and counter updating must be performed for one frame a plurality of times, which is inefficient.

[0004]

Means for Solving the Problems In order to solve the above-mentioned problem, a means provided by the first invention of the present application is that a frame whose data length is described at the beginning is divided into a plurality of packets and transmitted. In a device for measuring a traffic amount of a network, a packet detector for capturing a packet signal from the network, and link information of a frame described in a header of the packet signal captured by the packet detector may be a first segment or a single frame. In the case of, a header detector for sending out the packet signal, a packet length detector for detecting the data length of the packet signal sent from the header detector, and the data length detected by the packet length detector are added. And a recording unit for recording.

In order to solve the above-mentioned problem, a means provided by the second invention of the present application is to measure a traffic amount of a network in which a frame whose data length is described at the beginning is divided into a plurality of packets and transmitted. A packet detector for capturing a packet signal from the network, and a header of the packet signal indicating that the packet signal captured by the packet detector is the first segment of a frame or a single frame. ,
A header detector for transmitting the packet signal, a packet length detector for detecting a data length from a header of the packet signal sent from the header detector, and an address of the packet signal sent from the header detector. A traffic measurement system comprising: an address detection unit for detecting; and a recording unit for adding a data length detected by the packet length detection unit to each address detected by the address detection unit and recording a data amount. Device.

[0006]

(1) In the first aspect, when a frame is divided into a plurality of packets, the traffic amount is measured using only information on the data length included in the first packet. (2) In the second aspect, when the frame is divided into a plurality of packets, the traffic amount for each address is measured using only the data length and the address information included in the first packet.

[0007]

FIG. 1 is a block diagram showing an embodiment of a traffic measuring device according to the first invention of the present application. FIG. 2 is a diagram illustrating an example of a packet traveling on a network in the present embodiment.

In FIG. 1, a packet detector 20 receives a packet signal traveling on a transmission line 10. The header detection unit 30 detects a header from the packet signal detected by the packet detection unit 20, and reads the connection information of the frame. The packet length detector 40 reads the data length described at the beginning of the frame. The recording unit 60 has a counter for recording the integration of the data length.

In FIG. 2, the INFO length is described in the data length at the head of the frame. In the header of the packet, connection information of the frame, that is, whether the packet is the first segment of the frame, the middle, the end, or the single frame is described.

The operation of the embodiment will be described below. The packet detector 20 receives a packet on the transmission path 10 and transmits a packet signal to the header detector 30. The header detection unit 30 reads the header, and transmits a packet signal to the packet length detection unit 40 when the connection information of the frame described in the header is the first segment or a single frame. If the segment is an intermediate segment or end segment, the packet signal is discarded. Upon receiving the packet signal, the packet length detection unit 40 reads the INFO length described in the header of the frame, and transmits the INFO length to the recording unit 60. The recording unit 60 reads the value already recorded in the counter, adds the value received from the packet length detection unit 40, and writes the value again in the counter, thereby recording the traffic amount.

FIG. 3 is a block diagram showing an embodiment of the traffic measuring device according to the second invention of the present application. In the embodiment of the first invention, the recording unit 60 records the traffic amount irrespective of the address of the frame.
In the second embodiment of the present invention, an address detection unit 50 is provided to record a traffic amount for each transmission source address. When the header indicates that the received packet is the first segment of a frame, or a single frame,
The header detection unit 30 transmits a packet signal to the packet length detection unit 40 and the address detection unit 50. Address detector 5
0 detects the SA (source address) of the frame. The detected address is transmitted to the recording unit 60. The recording unit 60 has a counter for each address, reads a value from the counter corresponding to the address received from the address detection unit 50, adds the packet length detected by the packet length detection unit 40, and returns the value to the counter.

In the embodiment shown in FIG. 3, the SA (source address) is detected and the traffic amount is recorded for each SA. However, the address detection unit 50 detects the DA (destination address) and Of course, a method of recording the traffic volume of the vehicle is also possible.

[0013]

As described above, according to the present invention, even if a frame is divided into a plurality of packets, the traffic amount can be efficiently measured using only the data length and the address described at the head of the frame. It can be performed.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of an embodiment of the first invention.

FIG. 2 is a diagram showing a format of a packet traveling on a network.

FIG. 3 is a block diagram showing a configuration of an embodiment of the second invention.

FIG. 4 is a block diagram showing a configuration of a conventional traffic measurement device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Transmission path 20 Packet detection part 30 Header detection part 40 Packet length detection part 50 Address detection part 60 Recording part 70 Byte counting part

Continued on the front page (58) Fields surveyed (Int.Cl. ⁶ , DB name) H04L 12/56 H04L 12/24 H04L 12/26 H04L 12/28

Claims (2)

(57) [Claims] 1. An apparatus for measuring a traffic amount of a network in which a frame whose data length is described at the beginning is divided into a plurality of packets and transmitted, wherein a packet detecting unit for capturing a packet signal from the network; When the connection information of the frame described in the header of the packet signal captured by the detection unit is the first segment or a single frame, a header detection unit that sends out the packet signal, and the packet signal sent from the header detection unit A traffic length measuring unit comprising: a packet length detecting unit for detecting a data length of the packet; and a recording unit for adding and recording the data length detected by the packet length detecting unit. 2. An apparatus for measuring a traffic amount of a network in which a frame whose data length is described at the beginning is divided into a plurality of packets and transmitted, the packet detecting unit taking in a packet signal from the network; When the header of the packet signal indicates that the packet signal fetched by the detection unit is the first segment of a frame or a single frame, a header detection unit for transmitting the packet signal, and a transmission from the header detection unit. A packet length detecting unit for detecting a data length from a header of the packet signal obtained, an address detecting unit for detecting an address of the packet signal sent from the header detecting unit, and an address detected by the address detecting unit. Record the data amount by adding the data length detected by the packet length detection unit to the Traffic measurement device, characterized in that it consists of a part.