JPH03120933A - In-network delay time measuring method - Google Patents

Abstract

PURPOSE:To recognize a call connection time by allowing a measuring station to measure a call connection time till a measuring call setting reply packet is received, sending and receiving a measured packet through a call, measuring a packet delay time and returning the information to a network management equipment. CONSTITUTION:A network management equipment 1 sends a measuring command packet to packet exchanges 2, 3, the packet exchanges 2, 3 sends a request setting a measuring communication call to a packet exchange being an opposite party of measurement to measure the required time till the setting of the communication call is finished. Then the packet exchanges 2, 3 sends a measuring loopback packet to an opposite packet exchange to measure the time required for loopback of the packet. After the end of measurement, the packet exchange 2(3) releases the communication call to the measurement object packet exchanges 3(2), the call setting time measured before and the delay time in the communication data network are stored in measurement reply packet and the packet is returned to the network management equipment 1. Thus, the call connection wait time is recognized.

Description

[Detailed Description of the Invention] [Field of Industrial Application] This invention relates to an intra-network delay time measurement method in a packet-switched network having a network management device. 62-140537 is a diagram showing a conventional intra-network delay time measuring device. In the figure, (1) Vi measurement station, (2) the station to be measured, Q°C is the keyboard display (KDP), □□□, @ is the main memory (MM), ・J3. @ stands for data communication equipment (DCE)
). 3) is a relay transmission line (middle line) connecting the measuring station (1) and the station under test (2).

KD at the 0 measurement station (1) whose operation will be explained next.
When an instruction is given to measure the propagation delay time of the relay path (3) between the fixed station (2) and the station under test (2), the measuring station (1)
), set the logical channel for delay time measurement.

On the other hand, when the measured station (2) detects the setting of the delay time measurement logical channel from the measurement station (1), it prepares to receive the delay time measurement packet.

Next, the measurement station (1) transmits a delay time measurement packet on the delay time measurement logical channel. At this time, the measuring station (1
) stores the transmission time on the memory MM@. When the measured station (2) receives the delay time measurement packet, it returns it as is to the measurement station (1).

When the measurement station (1) receives the returned delay time measurement packet, it calculates the reception 4M time and writes the memo +)M
MU) - Calculate the difference with the transmission time stored in
This is stored in the memory MM(2) as the intra-network delay time. The transmission and reception of delay time measurement packets is repeated several times until an instruction to end the measurement is given from the KDP of the measurement station (1).

When the KDP of the measuring station (1) gives an instruction to end the measurement,
Stop sending and receiving packets for delay time measurement and move to measurement station (1)
Otherwise, disconnect the logical channel for delay time measurement.

The measurement target M(2) determines that the measurement is completed by detecting disconnection of the measurement logical channel. After completing the delay time measurement, move the measuring station (
When a display request is given in KDP in 1), memory MMGJ
The intra-network delay time stored above is displayed on the KDP.

[Problem to be solved by the invention]

Since the conventional intra-network delay time measurement device is configured as described above, the delay time value obtained from the measurement results reflects the propagation delay of the relay path between stations or the congestion situation of relay processing. It was just a thing.

In addition, packet switches are often multiprocessor systems for the purpose of distributing functions and distributing loads, and relay processing and call processing are handled by separate processors, and even during call processing, separate processors are used for each terminal line. Therefore, the above delay time value does not accurately represent the actual intra-network delay time in communication between subscriber terminals.

Furthermore, a man-machine device and an operator are required on the delay time measuring station side, and it is possible to quickly measure the intra-network delay time in communication between a subscriber terminal housed in an arbitrary station and an arbitrary communication partner. There are some problems such as difficulty.

This invention was made in order to solve the problems mentioned in E. The invention is based on the time required to connect a communication call between two subscriber terminals and the data packets between the processors of both subscriber terminals that perform the actual communication. It is possible to measure the delay time within the network.
The present invention also aims to provide an intra-network delay time measurement method in which instructions for intra-network delay time measurement of arbitrary terminal-to-terminal communication and display of results can be centrally performed from a central network 0 control processor.

[Steps to solve the problem]

The intra-network delay time measuring device according to the present invention is installed as a network management device in a packet switching network, and the network management device sends a packet instructing a packet switch to perform measurement, and the packet switch that receives the packet Measure the time from sending a communication call setup request packet for measurement to the destination packet switch to receiving the response packet, send a return packet for measurement to the destination packet switch, and send it. A device that measures the time from the time of reception to the time of return reception, and after completing the measurement, disconnects the measurement call that has been set up with the other party's packet switch, and sends the measurement results in packets to the network management equipment. It is.

[Effect]

In the intra-network delay time measurement method according to the present invention, the network management device sends a measurement instruction packet to a packet switch in accordance with a measurement instruction command input to an operator console, and the packet switch sends a measurement instruction packet to the other packet switch for measurement. Sends a fee for setting up a communication call, measures the time required to complete setting of the communication call, and then sends a return packet for measurement from the packet switch to the other party's packet switch. The required time is measured, and after the measurement is completed, the communication call between the packet switch and the other party's packet switch is released, and the previously measured call setup time and delay time in the communication data network are measured and the response packet is sent. The data is stored in the network, sent back to the network management device, and the measurement time is displayed.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to the drawings. ff
In 1llA, (1) is a network management device (Network
kControl Processor: Hereinafter referred to as NCP
), 00 is the N0PI operator console,
(2) and (3) C. NCP 1 and packet switches (2) and (3) constitute a packet switching network using a packet switch. Ml) is an equipment management unit (hereinafter referred to as EMU) in the packet switch, (c), 131)
is a packet processing unit (hereinafter referred to as PPU), (a)
, (to) are each a packet switch (2).

Among the subscriber terminals housed in (3), one PPU and one subscriber terminal are each connected. Q, 1, 6!
3. (to) DO]In(Data circuit for connecting relay circuit of packet switching network)
MinatingEquipment).

In this example, the packet switch (2) w w measuring station, i.e. N
The packet switching center (hereinafter referred to as PSm A) receives measurement instructions directly from the OP and manages the measurement operation sequence between exchanges, and the packet switch (3) serves as a child measurement station, that is, the packet switching center (hereinafter referred to as PEIEB) which is the measurement partner. ). @p is a measurement instruction packet sent from NOP l to PSE A, (9) is a measurement instruction packet sent to PSE A at the start of measurement.
Measurement call setup request packet FS (
) is the measurement call setup response packet returned from P811nB to PSmA, - is sent from PIE A, and PsK
PSE back at B! AK measurement packet coming back again,
The decoy is a measurement result notification packet for notifying NOP 1 of a series of measurement results.

Next, the operation will be explained. Here, Figure 2 is P8]1e
NOP and PS when measuring between A and Peg B
70- of the packet between mA and PegB, and Pi
Figure 3 shows the event flow between m and PPU of 9EA and FSRB, respectively.
This is a processing flowchart of egB. Fourth
The figure shows the structure of a measurement instruction packet and a measurement result notification packet, and FIG. 5 shows the structure of a measurement call setup JM request packet and a measurement call setup response packet. Figure 46 shows the structure of the measurement packet. In step 21, first, the measurement stations PIE A, PSE B are sent as parameters to the operator console of the NOP.
When a measurement command is input by specifying the measurement packet transmission repetition number and the measurement packet transmission repetition number, a measurement instruction packet θυ is transmitted from the NOP to the PRE A. At this time, in the measurement instruction packet 0◇, information is set that the child measurement station is PSF B and the number of times (n) of transmission peaks of the measurement packet is returned. p
sg A is the received measurement instruction bucket) 61) In order to set up a communication call for measurement based on the information in
1, a measurement call setup request packet (in which information about the measurement logical channel on the PSE A side is set for psgBK) is sent to psgBK.
6) Send. Measurement call setting! ! ! PRE B, which has received request packet G4, checks whether a measurement call can be set up and, if it is possible, sends a measurement call setup response bucket containing information about the measurement logical channel on the PSE B side.
Return to SEA 0 Pf3B A that received this non-measurement response packet Calculate connection time. The IPBmA transmits the measurement packet (3) through the measurement logical channel set up with the PSE B. At this time, the KMU of PSE A notifies the PPU of a measurement packet transmission request after setting the time stamp (2) at the time of transmission of the measurement packet (b) in the measurement packet. Upon receiving the measurement packet transmission request, the 9th PPU sends the measurement packet (goods) to PRE B.
Send to.

The PPU of PIKB that received the measurement packet immediately notifies the reception notification of the measurement packet. When receiving a measurement packet reception notification, the timestamp at the time of reception of the packet is displayed.
After performing the above processing, data of a measurement packet (goods) to be sent back to PSEA is created. At this time, along with the timestamp ■ and timestamp ■ values set in the measurement packet sent from PSEA, also set the timestamp ■ when sending the measurement packet to PSEA. After this, E'hlU of PSE B notifies the PPU of the measurement packet transmission request, and the PPU, which has received the measurement packet transmission request, transmits the measurement packet ■ to the PLEA. PIEA PPU that received the measurement packet (goods)
sends a measurement packet reception notification immediately. Upon receiving the measurement packet reception notification, Yami processes the timestamp (3) at the time of reception of the packet. With the processing up to this point, PSE A to P
SE B arrival packet delay time (timestamp difference -
■) and the delay time (timestamp difference ■-■) of the packet originating from PIE B and arriving at PSE A.
When receiving measurement instruction bucket) 141) from OP, if the number of repetitions is 2 or more, PSEA issues measurement packets the specified number of times and measures the packet delay time of communication with PSEB. PLEA sends a non-measurement release request packet to PRE B in order to release the logical channel for measurement between the bale and PSEB for which the measurement packet has been issued from PSE A. PSE B, which received the non-measurement release request packet, sets the measurement logical channel to the highest priority and sends a non-measurement release response packet to PSFiA. 0Receives the measurement call release response packet, PSmA releases the measurement communication call. and sends a measurement result notification packet) to the NOP. At that time, the measurement result notification packet contains the call connection time (timestamp difference ■-■), the delay time of the packet arriving at PSg B from PIA for the number of repetitions (timestamp difference ■-■), and the arrival time from PSE A from PI B. Set the value of the packet delay time (timestamp difference ■−■). This measurement result notification packet) is received and nine NOPs are received.
displays the time information on its operator console Although we have shown a method for simultaneously measuring delay time, it is also possible to measure only call connection time or packet delay time as a delay meter for manual commands from the NOP (1) operator console staff. You can also do it. When measuring only packet delay time, set the measurement logical channel to PVO (Parman
ent Virtua101rcuit fixed partner connection)
It's good as well.

In addition, in the above embodiment, a case was explained in which the delay time was measured in two packet exchanges. However, in one packet exchange, there is a continuity test device between PPU cards when a new PPU card is installed. [Effects of the Invention] As described above, according to the present invention, a network management device is installed in a packet switching network, and measurement instruction packets are measured from the network management device. The measurement station sends a measurement call setup request packet to the measurement partner station, measures the call connection time by the time it takes to receive a measurement call setup response packet from the other party, and The configuration is configured to transmit and receive measurement packets through the network, measure the packet delay time, set these measured values in the measurement result notification packet, and send it back to the network management device, thereby minimizing the communication delay time between arbitrary subscriber terminals. It is similar to actual X, 25 packet communication, and can be quickly controlled by remote control from the center, and it is also possible to know the call connection waiting time when a terminal call is made.

[Brief explanation of drawings]

FIG. 1 is a diagram showing a packet switching network according to an embodiment of the present invention, FIG. 2 is a diagram showing the flow of packets and the flow of events during delay time measurement, and FIG.
l (a) and (b) are diagrams showing the processing flow in the network management device, packet switch (parent measurement station), and packet switch (child measurement station), respectively. Figure 4 shows the measurement instruction packet and measurement result notification packet. FIG. 5 is a diagram showing the structure of a measurement call setup request packet and a measurement call setup response packet.
FIG. 6 is a diagram showing the structure of a measurement packet, and FIG. 7 is a diagram for explaining a conventional intra-network delay time measurement method.
In the figures, the same reference numerals indicate the same or corresponding parts.

Claims (4)

[Claims] (1) A method for measuring call connection time and packet delay time between subscriber terminals housed in a packet switch in a packet switch network, comprising: providing a network management device in the packet switch network;
This network management device sends a measurement instruction packet instructing the measurement of the delay time to the packet switch in which the desired subscriber terminal is housed, and the packet exchange that receives this measurement instruction packet A measurement call connection request packet is sent to the destination packet switch, and the destination packet switch, which receives this transmission signal, sets up a logical channel and transmits a measurement call connection response packet. The switching equipment establishes a logical channel and measures the time between the transmitted and received signals as a "call connection time." After establishing the logical channel, the packet switching equipment transmits a measurement packet to the partner packet switching equipment through this logical channel, In-house delay time measurement characterized in that a return measurement packet from the destination packet switch in response to this transmission signal is received, and the time between the measurement packet signals in both directions is measured and determined as the "measurement packet delay time". Method. (2) A method for measuring call connection time and packet delay time between subscriber terminals housed in a packet switch in a packet switching network, comprising: providing a network management device in the packet switching network;
This network management device sends a measurement instruction packet instructing the measurement of the delay time to the packet switch in which the desired subscriber terminal is housed, and the packet exchange that receives this measurement instruction packet A measurement call connection request packet is sent to the destination packet switch, and the destination packet switch, which receives this transmission signal, sets up a logical channel and transmits a measurement call connection response packet. A method for measuring delay time within a network, characterized in that the exchange establishes a logical channel and measures the time between the transmitted and received signals to determine the "call connection time." (3) A method for measuring call connection time and packet delay time between subscriber terminals housed in a packet switch in a packet switching network, comprising: providing a network management device in the packet switching network;
This network management device sends a measurement instruction packet instructing the measurement of the delay time to the packet switch in which the desired subscriber terminal is housed, and the packet exchange that receives this measurement instruction packet It transmits a measurement packet to the destination packet switch, receives a return measurement packet from the destination packet switch in response to this transmission signal, measures the time between the measurement packet signals in both directions, and calculates the delay time of the measurement packet. A method for measuring delay time within a network, characterized by: (4) In the intra-network delay time measurement method described in claims 1 to 3, the measurement is performed within a single packet switch in which two subscriber terminals to be measured are housed. A method for measuring delay time within a network.