JPH01160135A - Packet abort rate measurement system - Google Patents

Abstract

PURPOSE:To collect the traffic state of any operation with high accuracy as a measuring data by counting the number of real call packets from a subscriber terminal equipment so as to apply measurement. CONSTITUTION:Count sections CTS, CTR counting a transmission packet and a reception packet of a real call are provided to port sections P0-Pn for each of subscriber terminal equipments DTE1-DTEm. Based on the counted value of a transmission packet and a reception packet of a real call obtained in all ports of a packet switchboard the packet abort rate is measured. Thus, the traffic state of any operation is measured quickly to collect data without giving any effect on the traffic of the packet switching network or without giving any effect on the on-line processing, and the measurement of the packet abort rate is implemented with high accuracy.

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to iJ? This paper relates to a packet discard rate measurement method in packet switching networks and packet switching equipment.

(Prior Art) Conventionally, in a method for measuring the packet discard rate of a packet network, a pseudo terminal function section is provided in a mother packet switch, and measurement is performed by transmitting and receiving a test data bucket (t) in a test mode. Figure 2 illustrates the conventional method for measuring the waste rate. 1 is an example of a connection diagram of a packet switching network. In the same figure.

Is N1 p4? Kett exchange network, A is Nogukerato exchange network Nl
DTF 1 is a subscriber terminal that accommodates exchange A&C, cp& is a call processing function unit in packet switch A, and F8 is a call reception/response control function when a call is received, and the received data is sent directly to the originating side. This figure shows a pseudo-terminal function unit that has a call-back function to a terminal and a call disconnection processing function. Subscriber terminal D accommodated in packet switching network N1
When the call processing function CPa sets up a call between the TE 1 and the pseudo terminal function FaO of the packet exchange A, the subscriber terminal DTE 1 transmits a large amount of test data. This test packet is from the call processing function unit CP.
It is sent to the pseudo terminal function section Fa according to the instruction of a. The pseudo terminal function unit Fa sends test data/kerat back to the subscriber terminal DTE 1. Subscriber terminal DTE 1
The system collated and inspected the contents of transmitted and received data and measured the packet discard rate.

(Problems to be Solved by the Invention) However, in the conventional system described above, the subscriber terminal DTE
A large amount of test data packets will be generated in addition to the data packets of the actual call between the pseudo terminal function units F and L in the packet switch A. Collisions are likely to occur, which increases the packet discard rate and reduces measurement accuracy. In particular, if the above measurements are performed when the packet-switched network is congested, the addition of test data packets will accelerate the congestion of the packet-switched network and cause the service of the packet-switched network to deteriorate. was there.

This invention eliminates the above-mentioned problem of lowering the measurement accuracy when measuring the ZF packet discard rate and the problem of causing deterioration of the service of the mother packet switching network, thereby reducing the impact on the traffic of the packet switching network. Don't give,
The purpose of the present invention is to provide a method for quickly measuring and collecting data on the traffic status of all operations without affecting online operations, and measuring the packet discard rate with high precision.

(Structure and operation of the invention) The present invention provides a method for measuring the packet discard rate of a packet switch that includes a port section that accommodates a plurality of subscriber terminals and a switch section that accommodates a plurality of the port sections. A counting section for counting the transmitted packets and received packets of real calls is provided in the port section, and the transmission/reception A? of real calls obtained from all ports of the packet switch is provided. This is a packet discard rate measurement method characterized by measuring the packet discard rate based on packet numerical values. By adopting such a configuration, it is possible to easily transmit and receive packets of actual calls without using a large number of test packets as in the past. The number of packets can be counted, /
The Yakette disposal rate becomes the turnover rate.

(Embodiment) FIG. 1 is a connection configuration diagram of a packet switch showing an embodiment for explaining the packet discard rate measurement method of the present invention.
1 to DTE m are subscriber terminals, P to P n are port units each accommodating a plurality of subscriber terminals and ii'.

TRC is a measurement processing unit, PMX is a t4 ket multiplexing and decomposition unit/4' ket multiplexing/decomposition unit, S to Sm
is a subscriber line corresponding unit that accommodates each subscriber terminal DTE 1 to DTE m f, PAD is an A'ket generation unit, and CTS is
is the sending/IP packet counting section, and CTR is the receiving/main packet counting section.

cp is a call control processing unit, sw is a switch unit, and 06M is a maintenance operation device. Port units P, -Pn have the same configuration as port unit P0. Data from a certain subscriber terminal DTE x is packetized by the /9 packet generation unit FAI) of the port unit P, multiplexed by the packet multiplexing/demultiplexing unit PMX, and sent to other accommodated subscribers by the switch unit 5w6g. It is sent via the reverse route to terminal DTE y.

Next, a method for measuring the A'ket discard rate in this configuration will be explained. First, the measurement processing units TRC installed in each port unit P0 to Pn operate each subscriber line corresponding circuit S autonomously using its own clock or upon receiving instructions from the maintenance operation device 04M. Instruct the transmit packet counter CTS and receive packet counter CTR of -8m to start measurement. Each transmission packet counting section CTS and receiving packet counting section CTR are as follows:
The buckets (buckets) k that are transmitted and received for a certain period of time are counted according to instructions from the measurement processing unit TRC. Thereafter, the measurement processing unit TRC receives an instruction from the autonomous or maintenance/operation device 06M and instructs each transmitting/base packet counting unit CTS and receiving/target counting unit CTR to end the measurement. The transmission packet counting section CTS and the receiving foot counting section CTR stop counting, and the information counted during that time is stored in the measurement processing section TRCK. This accumulated measurement information is sent to the maintenance-operation device 0&M at times of low traffic according to instructions from the maintenance-operation device 0&M. The maintenance and operation device 06M calculates the discard rate from this measurement information.

Also, this method can be used to configure a packet switching network A? When applied to all ticket exchange machines, it is possible to measure the ticket discard rate in the ticket exchange network.

(Effects of the Invention) As explained above, according to the present invention, measurement is performed by counting the number of actual call packets from subscriber terminals without using a large amount of test data packets.

It is not affected by packet switching network traffic and can perform highly accurate measurements at any time, and it is also possible to quickly collect the traffic status of any operation as measurement data without affecting online operations.

[Brief explanation of the drawing]

FIG. 1 is a connection configuration diagram of a packet switch showing an embodiment of the present invention, and FIG. 2 is a diagram of a conventional packet switch. FIG. 2 is a diagram illustrating a packet switching network connection configuration for explaining a Kerato discard rate measurement method. DTE1~DTE m...Subscriber terminal, Po%Pn・
・Port section for accommodating subscriber lines, 80~Sm...
Subscriber line compatible circuit, PAD...NO'L? packet generation unit, CTS...4 packet counting unit for transmission, CTR.
... Received packet counting unit, PMX... Packet multiplexing/
Separation unit, TRC...Measurement processing unit, cp...Call control processing unit, 0&M...Maintenance and operation equipment, N1...Packet switching network, A...Packet switching network, CPa...Call processing Functional unit, Fa...Pseudo terminal functional unit. Patent applicant Oki Electric Industry Co., Ltd.

Claims (3)

[Claims] (1) In a packet discard rate measurement method for a packet switch consisting of a port section that accommodates multiple subscriber terminals and a switch section that accommodates multiple port sections, the transmitted packets and received packets of actual calls are measured for each subscriber terminal. A packet discard rate measuring method, characterized in that a counting unit for counting is provided in the port unit, and the packet discard rate is measured based on actual call transmission and reception packet counts obtained from all ports of a packet switch. (2) The packet discard rate measuring method according to claim 1, wherein the count of transmitted packets and received packets is counted by a clock provided in each port unit. (3) The packet discard rate measuring method according to claim 1, characterized in that the counts of the transmitted packets and the received packets are counted by instructions from a console unit of a packet switch.