JPH1093563A - Transmission line confirmation system by test packet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To grasp a data transmission path, a data transmission time and an elapsed time for each block by using a test packet in a line network between a transmission station and an opposite station. SOLUTION: A transmission station sends a test packet in a format shown in figure (A) to a reception station. A relay station on the way generates a passing notice packet shown in figure (C) and sends it to the transmission station. The reception station generates a reply test packet shown in figure (B) and sends it to the transmission station to conduct reception reply. The transmission station receives the reply test packet and the pass notice packet so as to accurately grasp a transmission pass time of the test packet and a block transmission time or the like based on information of each header part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transmission path confirmation system using a test packet, and more particularly to a transmission path confirmation using a test packet for transmitting a test packet from a transmitting station to a receiving station via a relay station. It is about the system.

[0002]

2. Description of the Related Art An example of a conventional transmission line confirmation system using this type of test packet is disclosed in Japanese Unexamined Patent Publication No. 2-7273.
There is a technique disclosed in Japanese Patent Application Laid-Open No. 7-107. In this conventional transmission path confirmation system, using a network for data exchange,
This is a method in which a test packet is transmitted from an arbitrary transmitting station to an arbitrary partner station (receiving station) via an arbitrary first to n-th relay stations, and a line use status is grasped.

In this case, the addresses at the time of passing through the first to n-th relay stations and the partner station and the passing time are sequentially additionally recorded in the test packet, and each station is selected from the data additionally recorded in the test packet. In order to be able to grasp and display the required time required, the data of the line status is recorded on a recording medium such as a disk device.

[0004]

Originally, the purpose of a test packet is to return a response packet if the test packet created by the transmitting station reaches the destination station and the test packet is normal at the destination receiving station. The station receives the response packet and confirms the content, and if it is normal, confirms the transmission as normal arrival.

In the above-mentioned prior art disclosed in Japanese Patent Application Laid-Open No. 2-72737, the address and the passing time at the time of passing are additionally recorded sequentially in the relay station or the other station that has received the transmitted test packet. Cannot verify the contents of the return packet against the transmission test packet. Further, since the destination of the return packet is the same, there is a disadvantage that the same test packet turns around on the transmission network and does not converge.

In addition, since the address and the passing time are additionally recorded in the passing station, a processing time for additional recording is added to the time at each passing, and the time is transmitted to the next station. There is a problem that the transit time in the packet returned by the transmitting station is longer than the transmission time of a regular packet.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a transmission path confirmation system using a test packet which enables a transmitting station to check the content of a return packet with respect to a transmission test packet.

Another object of the present invention is to provide a transmission path confirmation system using test packets that facilitates understanding of a data transmission path for a circuit network from a transmitting station to a partner receiving station.

Still another object of the present invention is to provide a transmission path confirmation system using a test packet, which can grasp the data transmission time of a line network from a transmitting station to a partner receiving station and the elapsed time of each section. It is to be.

[0010]

According to the present invention, there is provided a transmission path confirmation system using a test packet for confirming a transmission path by transmitting a test packet from a transmitting station to a receiving station via a relay station. In the transmitting station, a means for generating and transmitting a test packet having a header portion provided with at least an address portion for respectively specifying a transmitting station and a receiving station is provided, and in the relay station, receiving the test packet Means for setting at least the relay time of the test packet in the header portion in response to the packet and transmitting the same as the passage notification packet to the transmitting station; and Means for setting in a header part and transmitting the test response packet to the transmitting station as a test response packet. System is obtained.

[0011] The relay station may copy a header portion of the test packet into a data portion of the passage notification packet, and the receiving station may copy a data portion of the response test packet. The data part of the received test packet is copied.

Further, the receiving station is characterized in that an address for specifying the transmitting station and its own station is respectively generated in a header portion of the response packet, and the relay station includes An address for specifying the transmitting station and the own station is generated in a header portion of the passage notification packet.

The operation of the present invention will be described. When transmitting a test packet, the test packet is relayed as it is without any additional recording to the test packet.At the destination station, the received test packet is in the specified format and the content is normal. Is checked, and if the result is good, the data part (data and telegram) of the test packet is copied to the data part of the response packet as a response packet and transmitted. The transmitting station checks whether the received response packet is in the prescribed format and whether the content is normal.

At this time, the passing relay station and the partner station
A test packet recognition unit is provided to identify whether the received packet is a test packet. If it is determined that the received packet is a test packet, the received packet is classified as addressed to its own station or passed (exchanged). The packet is transferred to the switching unit and the test packet passing notification packet processing unit, and the switching unit switches to the corresponding line according to the destination.

The test packet passage notification packet processing unit creates a passage notification packet composed of the address at the time of reception and the exchanged address and the header of the test packet, and transmits the packet to the test packet transmitting station. Also, with regard to a response packet returned from the partner station, the passing relay station transmits a passage notification packet to the test packet transmitting station when passing.

The transmitting station checks the contents of the received pass notification packet and response packet, and if the result is good, passes the contents to the display device, and arranges the transmission / reception contents in chronological order on the display device for display and display. Display the transit relay station.

[0017]

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

FIG. 1 is a block diagram of an embodiment of the present invention. In FIG. 1, for simplicity, only the transmitting station and the first relay station are shown, but the rightward direction of the first relay station is shown. (On the paper surface of FIG. 1), and further, the second to n-th relay stations are connected, and the respective configurations of the transmitting station and the relay station are the same.

The packet switching units 1 and 11 exchange transmission packets, and have a function of performing an exchange process in accordance with a destination station address (see FIG. 2) attached to the header of the packet.

The test packet recognizing units 2 and 12 recognize whether or not the transmission packet is a test packet, and notify the test packet transmission / reception processing units 3 and 13 of the own station and the test packet passage notification packet processing units 4 and 14 respectively. To report.

Own station test packet transmission / reception processing units 3 and 13
In the case of a transmitting station of a test packet, a process of generating a test packet shown in FIG. 2A is performed, and in a case of a receiving station, a process of generating a response test packet shown in FIG. 2B is performed. Test packet passage notification packet processing unit 4, 1
Reference numeral 4 denotes a test packet, and if the own station is a relay station, performs a pass notification packet generation process shown in FIG.

The display / input units 5 and 15 have a function of displaying and inputting various data.

The operation of the above configuration will be described below. A case in which a test packet is transmitted from a transmitting station to a certain receiving station (one of the first to n-th relay stations) will be described.

When a test packet is transmitted, the address / data of the destination station (data or data at the time of transmission) is input to the display / input unit 5 of the transmitting station, and the transmission / display is performed. 3, the local station test packet transmission / reception processing unit 3 creates the test packet according to the configuration of the test packet shown in FIG. 2A, passes the test packet to the test packet recognition unit 2, and sends it out to the relevant line.

The first receiving the transmitted test packet
The relay station identifies whether or not the received packet is a test packet. If the received packet is a test packet, the relay station first determines whether the packet is addressed to itself or passes (exchanges). And to the test packet passage notification packet processing unit 14.

The packet switching unit 11 switches to the line corresponding to the destination station of the test packet, and switches to the next station (the n-th relay station).
Send to In addition, a pass notification packet for performing a test packet pass notification is created as shown in FIG. 2C and transmitted to the test packet transmitting station.

In the case of a test packet addressed to the own station, the test packet is passed to the own station test packet transmission / reception processing unit 13 to check the packet configuration and contents.
It is created as shown in (B) and transmitted to the calling station.

In the relay station that has received the response packet, a pass notification is created in the same way as the test packet by the test packet pass notification packet processing unit 14 and transmitted to the partner station of the response packet.

In the transmitting station, the test packet passing notification packet and the response packet to be received are checked by the own station test packet transmission / reception processing section 3 for the structure and contents thereof.
Display / input section 5 for displaying the result contents, relay station address and passing time
The display / input unit 5 displays the passing relay station, the passing time, the elapsed time, and the like, so that the transmission station can confirm the transmission state of the partner station.

FIG. 2A shows an example of the configuration of a test packet. a is a packet type, b is a calling station address, c is a destination station address, d is a calling time of the calling station, and e is a test packet configuration including five types of data parts.

FIG. 2B shows an example of the configuration of a test response packet. f is the packet type, g is the response station address, h
Is the address of the partner station, i is the originating time of the responding station, and j is the configuration of a test response packet consisting of five types: a data portion (copying the data portion of the test packet).

FIG. 2C shows an example of a configuration of the passage notification packet. k is the packet type, l is the passing station address, m is the address of the partner station, n is the transmission time of the passing station, o is the exchange address, p is the passing time, and q is the data part (the header part of the test packet or the test response packet). (Copy header section).

[0033]

As described above, according to the present invention, since no processing such as adding any information to the test packet is performed in each of the relay stations, the transmission of the test packet is accurate and delayed. There is an effect that can be performed without.

Each relay station generates a pass notification packet at the time of relaying the test packet, adds information such as the passing time at its own station to the header of the pass notification packet, and includes a test packet in its data portion. Since the header portion is copied and transmitted to the transmitting station, there is an effect that the data transmission path and the data transmission time can be easily grasped.

Further, since the receiving station transmits a response packet to the transmitting station with a time in response to the reception of the test packet, the transmitting station can accurately grasp the packet transmission. .

[Brief description of the drawings]

FIG. 1 is a system block of an embodiment of the present invention.

2A is a diagram illustrating a format example of a test packet, FIG. 2B is a diagram illustrating a format example of a response test packet, and FIG. 2C is a diagram illustrating a format example of a passage notification packet;

[Explanation of symbols]

 1,11 packet switching section 2,12 test packet recognition section 3,13 own station test packet transmission / reception processing section 4,14 test packet passage notification packet processing section 5,15 display / input section

Claims (5)

[Claims] 1. A transmission path confirmation system based on a test packet for confirming a transmission path by transmitting a test packet from a transmitting station to a receiving station via a relay station, wherein the transmitting station includes at least the transmitting station and a receiving station. Means for generating and transmitting a test packet having a header portion provided with an address portion for specifying each station, wherein at the relay station, at least a relay time of the test packet in response to reception of the test packet; Is provided in the header portion and transmitted to the transmitting station as a passage notification packet. At the receiving station, at least a response transmission time is set in the header portion in response to the reception of the test packet, and is set as a test response packet. A transmission path confirmation system, comprising: means for transmitting to the transmission station. 2. The transmission path confirmation system according to claim 1, wherein the relay station copies a header part of the test packet into a data part of the passage notification packet. 3. The transmission path confirmation system according to claim 1, wherein the receiving station copies a data portion of the received test packet into a data portion of the response test packet. 4. The receiving station according to claim 1, wherein said receiving station generates an address for specifying said transmitting station and its own station in a header portion of said response packet.
The transmission path confirmation system according to any of the above. 5. The relay station according to claim 1, wherein an address for specifying the transmitting station and its own station is generated in a header portion of the passage notification packet.
5. The transmission path confirmation system according to any one of items 1 to 4.