JPH03238959A - Congestion monitor system - Google Patents

Abstract

PURPOSE:To reduce the recovery time from the congestion state by providing a congestion memory with congestion information representing whether or not an opposite connection destination exchange is in congestion set therein and referencing the congestion memory to decide an outgoing route immediately when each exchange receives a call and decides the outgoing route. CONSTITUTION:Upon the receipt of a call, an exchange station selects an outgoing line path with respect to an incoming call to recognize a connection destination exchange station of the selected outgoing line. Then the exchange station investigates the congestion by inquiring about a congestion memory 25 based on the name of the exchange station recognized by a line selection section 26 selecting one line. The line selection section 26 checks a station name (e. g. B) by the congestion memory 25 and selects one of outgoing lines to be selected when no congestion is discriminated based on a code 0 of an information area. When the selected outgoing line is connected to a station name A, since the information of the congestion state is acquired, the line selection section 26 selects other bypass. Thus, the recovery time of the congestion state is decreased.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a congestion monitoring system for a communication network formed by a plurality of exchanges.

[Conventional technology]

Conventionally, in this type of congestion monitoring method, the switching equipment in the m ring itself performs congestion monitoring based on the processor usage rate and transaction usage rate, and if it determines that there is congestion, it restricts incoming calls and prevents calls from the opposing switching equipment. A system is adopted in which the own exchange lowers its own load and releases the grouping by returning a disconnection signal to the call.

Therefore, since each of the plurality of exchanges does not know whether the opposite exchange is congested or not, when receiving a call and setting an outgoing line route, the call is also connected to the exchanges in the m ring.

[Problem to be solved by the invention]

The conventional congestion monitoring method described above is configured to monitor congestion only within the exchange, so even if a congested exchange restricts incoming calls, calls from the opposite exchange will not be received within the m ring. Even when the call enters the exchange, there is a problem that not only is there a delay in the process of returning a disconnection signal to the call from the other exchange due to congestion, but also that it takes time to clear the congestion due to these unnecessary processes. was there. In addition, since disconnection signals are returned from busy exchanges at the originating exchange, the number of uncompleted calls increases, resulting in an increase in unnecessary connection processing, and it is difficult for the opposite exchange to recognize that the other exchange is busy. The problem is that it takes time, and that the network itself becomes stuck due to wasteful processing, and congestion gradually spreads to the entire network.

An object of the present invention is to provide a network management system that detects a congestion state more quickly and notifies each exchange, shortens the recovery time of the congestion state, and provides an exchange that has an outgoing line to the exchange that is experiencing congestion. By improving the processing efficiency of
The object of the present invention is to provide a traffic monitoring method that solves the above problems.

[Means to solve the problem]

The basic configuration of the congestion monitoring method according to the present invention is that the congestion monitoring method for a communication network formed by a plurality of exchanges receives the usage status of the line from all of the exchanges, determines the congestion status, and uses the determination result. a network management system that transmits congestion information to each exchange; a line information transmitter that transmits usage status of a line accommodated by the exchange to the network management system; and a line information transmitter that receives congestion information from the network management system. It has a congestion memory for writing and storing information, and a line selection section for selecting an outgoing line according to the congestion information stored in the congestion memory.

One specific configuration of the network management system described in the basic configuration includes a usage rate calculation unit that calculates and outputs the line usage rate for each exchange when receiving the usage status of the line from each exchange, and a usage rate calculation unit that calculates and outputs the line usage rate for each exchange, A line information memory that stores the line usage rate output from the rate calculation unit for each exchange, and a congestion value for determining that the line is congested based on the line usage rate and a release value for determining that the congestion has been released are set and stored in advance. and a comparison section that reads the line usage rate from the line information memory at a predetermined time, compares it with the congestion value (congestion value) and release value of the threshold memory, and outputs it to the exchange as congestion information for each exchange.

One specific configuration of the exchange described in the above basic configuration includes a line information transmitter that transmits line usage status as line information to a network management system at a predetermined time, and a line information transmitter that transmits congestion information received from the network management system. The system includes a congestion memory that stores information for each opposing exchange, and a line selection section that selects an outgoing line while avoiding the outgoing line to the congested exchange stored in the congestion memory when selecting an outgoing line.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIGS. 1 and 2 are diagrams of an embodiment of the present invention, in which FIG. 1 shows the network management system part in FIG. 2, and FIG. 2 shows the exchange part in FIG. 1, and FIG. An example of each functional block is shown.

As shown in FIG. 1 p and FIG. Consists of at least one exchange, exchanges (A) to (
C) may be replaced.

As shown in FIG. 1, the network management system l includes a line information receiving section 11. Line information memo IJ12゜usage rate calculation unit 13. It has a threshold memo IJ 14 , a comparator 15°, and a convergence information transmitter 16. The line information receiving unit 11 receives line information from all of the exchanges (A) to (C)2, transfers it to the line information memo IJ12, and writes and stores it.

The line information is use/non-use information of outgoing lines accommodated for each switching center (λ) to (C)2.

For example, the line information is the outgoing line number in use for each exchange. The line information memo IJ12 writes and stores a line number button for each station name, an indication that the line with this line number is in use, and a line usage rate calculated from these in-use information.

The indication that the line number is in use is based on a notification from the line information receiving section 11.

The usage rate calculation unit 13 reads the total number of lines button and the number of lines displayed in use from the line information memory 12 at a predetermined time for each switching station Meijin + B t --- and calculates the line usage rate.
It is written and stored in the line information memory 12. Threshold memo IJ
14 is the congestion (setting amount) 1 direct p and (convergence ring setting) W4 minus (
(threshold) value is stored in advance.

The comparison unit 15 reads the usage rate for each exchange name from the line information memory 12 at a predetermined time, compares it with the grouping value and release value in the threshold memory 14, and when the line usage rate>congestion value, the congestion side output information is obtained. , and when the line usage rate is the release value, the congestion release information is output to the congestion report transmitter 16 along with the name of each exchange (of course, the code). The congestion information transmitter 16 is the comparator 15
It receives the output from and transmits it to each switching center (A) to (C)2.

As shown in FIG. 2, the switching center 2 includes a line connection section 21, a line information collection section 229, a line information transmission section 23. Congestion information receiving unit 24. It has a brightness memory 25 and a line selection section 26.

The line connection section 21 is an interface section that accommodates lines with other exchanges. The line information collection unit 22 receives the drive signal at a predetermined time, collects the line number in use from the line connection unit 21, and outputs the collected line number. The line information transmitting unit 23 adds the code of the exchange name to the in-use line number output from the line connecting unit 21 and sends it to the network management system l. Send as ff report.

The congestion information receiving unit 24 receives the congestion information from the network management system 1 and transfers only the information on the destination switching center of the outgoing line of the local switching center 2 to the congestion memory 25 . The group memory 25 writes and stores the congestion status of each exchange based on the wA@ information received from the congestion information receiving section 24, for example, code 1 indicates that congestion is in progress, and code 0 indicates that congestion is being removed. Line selection section 26
Search for a vacant line from the J/i line connection unit 21, read out the game's ring state from the ring memory 25, and read the code O of the information.
Select the outgoing line to the exchange.

Next, the operating procedure of the network management system 1 will be explained with reference to FIG. 3 and FIG. 1.

FIG. 3 is a flowchart showing an example of a network management system.

Without switching, the line information receiving unit 11 receives (lOl) the line number in use as line information from the exchange (for example) (A), and transfers it to the line information memory 12. Line information memo +71
2 writes the code l in use in the in-use display area corresponding to the received line number in the area of the received station master, writes the code O in the remaining area, and drives the usage rate calculating section 13. The usage rate calculation unit 13 is driven, reads the total number of lines and the number of lines in use from the station master area, calculates the line usage rate (102), and writes and stores it in the station master usage rate area of line information memo +712. At the same time, it is also transferred to the comparison section 15.

When the comparison unit 15 receives the line usage rate together with the station master,
Comparison with the threshold value stored in advance in the threshold value memory 14 (10
3) Do. First, the comparison unit 15 compares the line usage rate with congestion (@).
4rL comparison (104)L, If it is small and does not reach the convergence ring, it is compared with the cancellation value (110), and if it is large and in the convergence state, the convergence ring detection information is sent to the congestion information transmitter 16. (120).

In step 110, the comparator 15 does not perform any processing when the line usage rate is greater than the release value, and when the line usage rate is small and the traffic load is light, it transmits electrical connection release information via the congestion information transmitter 16 (111). do.

Next, the main procedures of the switching center will be explained with reference to FIG. 4 and FIG. 2. FIG. 4 is a flowchart showing an example of ring clearing registration, and FIG. 5 is a flowchart showing an example of outgoing line selection.

When activated (201) at a preset time, the line information collection unit 22 collects line monitoring information from the line a connection unit 21 (202) and outputs the line number in use to the line information transmission unit 23. do. Times! ! The information transmitter 23 adds the name of its own exchange (normally included as the calling place address), transmits the line number in use, and transmits it to the network management system 1 as an @ff report (203). After this, the congestion information is received from the network management system 1 (2
04), the operation procedure ends as is.

In step 204, the width edge information receiving unit 24 receives @ living detection information as width edge information from the network management system l (2
10), the width edge memory 25 receives the transfer and stores the width edge code l in the width edge information area for the received station name (for example) A.
is written and recorded (211).

When width edge release information is received (220) in step 204,
The width end memory 25 receives the transfer from the congestion information receiving section 24,
Delete the width end code of the received station name (for example) B (221
) and rewrite the code to O.

Next, referring to FIG. 5 and FIG. 2, the procedure for selecting the outgoing line of the exchange will be explained. FIG. 5 is a flowchart showing an example of the main operating procedure of the present invention. When the exchange receives a call, it selects the outgoing line route to the destination (30
1) L recognizes the connected switching center of the selected outgoing line (302
)do. Next, the exchange investigates the congestion situation in the width end memory 25 from the name of the exchange recognized by the line selection unit 26 that selects one line (303). Line selection section 26
checks the station name (for example) B in the electric ring memory 25, and when it is determined that it is not at the width end (304) based on the code O in the information area, selects one of the selected outgoing lines, and the exchange A call is connected (310) to this selected outgoing line. When the selected output line is connected to the station name A Vc, the code 1 is set in step 304.
Since the information in the width end is obtained by , the line selection unit 26 checks another detour route (320), and if there is a detour route, selects the next outgoing line route (321)L, and continues to step 302.

If there is no detour route in step 320, the width end is notified to the calling party (322) and the procedure ends.

In this embodiment, it has been explained that the switching center sends the line number in use as a line number update, but in consideration of the failure to update the line information memory of the network management system, it may also be sent including the number of lines in use. Although there is an increase in call volume, the line status may be sent sequentially for all lines. In particular, in the detailed management of line conditions such as those in use, failures, and inspections,
The content of the line information becomes darker.

The network management system explained that when the usage rate is stored in the line information memory, it compares it with a threshold value and sends out the electric ring information, but at a predetermined time, the usage rate of each station is translated all at once in the line information memory. and compare the generated iN
A@tT! The procedure may also be to send t@.

The width edge information sent from the network management system is broadcast to all exchanges, and each exchange selects the source exchange of the congestion information, and the exchanges that do not have this source exchange as a connection destination. Even if the information is discarded, the network management system may hold the network information and transmit it only to the necessary exchanges, thereby reducing the load on the connection path p and related processors.

In the present embodiment, the functional blocks and procedures have been illustrated and explained, but the functions before and after the function allocation buttons and procedures for each functional program according to the present invention may be any that can perform the same function, and are not limited by the above explanation. It's not something you can do.

〔Effect of the invention〕

As explained above, the present invention provides a width edge memory in which width edge information indicating whether the connecting destination exchange facing each of a plurality of exchanges is in the width edge is set, and each exchange receives a call. By configuring the system to immediately determine the outgoing route by referring to the width edge memory when determining the outgoing route, the call is not sent to the exchange at the edge of the width, and therefore, The processing time of the switch at the edge of the width is reduced, improving and shortening the recovery time from the edge of the width condition, and the number of incomplete calls is reduced in the exchange opposite to the exchange at the edge of the width, reducing wasted connection processing time. This makes it possible to process normal calls at the originating location, thereby improving processing efficiency, thereby making it possible to avoid the problem of congestion spreading to the entire network.

[Brief explanation of drawings]

FIGS. 1 and 2 are block diagrams showing detailed embodiments of the main parts of the present invention, and FIGS. 3 and 4 show the main operation procedures of the buttons in FIG. FIG. 5 is a flowchart showing an example of the main operating procedure of the exchange according to the present invention. l...Network management system, 2...
°゛Switching center (exchange), 12... Line information memory, 13... Usage rate calculation unit, 14...
Threshold memory, 15...0. . Comparison section, 22...Line information collection section, 23...
. . . line information transmission section, 25 . . . assembly memory,
26...--Line selection section.

Claims (1)

[Scope of Claims] 1. In a congestion monitoring system for a communication network formed by a plurality of exchanges, the line usage status is received from all of the exchanges, the congestion status is determined, and this determination result is sent to each exchange as congestion information. a line information transmitter that includes a network management system for transmitting data, and that transmits the usage status of a line accommodated by the exchange to the network management system; a congestion memory that writes and stores congestion information received from the network management system; A congestion monitoring system comprising: a line selection unit that selects an outgoing line according to congestion information stored in the congestion memory. 2. The network management system according to claim 1 includes a usage rate calculation unit that calculates and outputs the line usage rate for each exchange when receiving the usage status of each line from each exchange, and a line usage rate output from the usage rate calculation unit. a line information memory for storing the line information for each exchange, a threshold memory for setting and storing in advance a congestion value for determining that the line is congested and a release value for determining that the congestion has been released based on the line usage rate; 2. The congestion monitoring method according to claim 1, further comprising a comparison unit that reads the line usage rate from the memory, compares and determines the line usage rate with the congestion and release values in the threshold memory, and outputs the result to the exchange as congestion information for each exchange. 3. The exchange according to claim 1 includes a line information transmitter that transmits line usage status as line information to the network management system at a predetermined time, and writes and stores congestion information received from the network management system for each opposing exchange. 2. The congestion monitoring system according to claim 1, further comprising a congestion memory and a line selection unit that selects an outgoing line while avoiding an outgoing line to a congested exchange stored in the congestion memory.