JPS60263552A - Congestion detecting system for each terminal group - Google Patents

Abstract

PURPOSE:To attain the decision of congestion from a fixed standard and to improve the reliability with this decision, by performing the replacement and correction of an overflow traffic counter when the connection requests and calls are through with the registered terminal groups. CONSTITUTION:A memory 10 contains a connection circuit counter 11 for control of the simultaneous connection number of each registered terminal group and an overflow traffic counter 12 which decides the congestion from the overflow traffic of each registered terminal group. The counter 12 is corrected when the call of a registered terminal group 2 received from an exchange 4 is over. Then an idle or busy state is decided by the counter 11 with the connection request to the registered terminal group. When all terminals are busy, the counter 12 is replaced. Then the contents of the counter 12 are compared with the reference value decided separately for decision of the congestion state of the terminal 2.

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a method for detecting congestion by terminal group, and in particular detects congestion on the subscriber terminal side by counting overflow calls that occur during busy periods of registered terminal groups. This relates to a method for detecting.

[Background of the invention]

Conventionally, individual subscriber congestion has been detected by sequentially registering the terminal number of the overflow call in a memory area of a predetermined size each time an overflow call occurs. This is done by performing a search every cycle, counting the number of registered terminals with the same number, and determining that there is congestion when the count value is equal to or greater than a separately determined threshold.

Furthermore, when the memory area is full, the terminal numbers registered in the memory area are deleted in order from the oldest, and the terminal numbers of newly generated overflow calls are registered. In such a method, in order to make a fair width determination for subscribers, for example, for subscribers who can connect multiple terminals with one terminal number as in the case of representative services, , determine if the width is thin by setting a threshold according to the number of lines owned by the subscriber, or normalize the number of registered lines in the memory area by the number of lines owned by the subscriber, and then determine if the width is thin. However, there are drawbacks such as increased memory capacity and complicated processing such as threshold determination and congestion determination.

Also, because the terminal number registered in the memory area is searched at a certain period.

For example, if a large number of overflow calls occur concentratedly on a certain terminal number, the memory area to be registered will become full due to the large number of overflow calls to that terminal, and the terminal numbers of other narrow subscribers will be The disadvantage is that it is erased and overlooked.

[Purpose of the invention]

An object of the present invention is to provide a group of terminals capable of eliminating such conventional drawbacks, determining whether the width is thin using a reference value that does not depend on the number of lines owned by a subscriber, and improving the reliability of the narrow width determination. The purpose of the present invention is to provide a different narrow width detection method.

[Summary of the invention]

In order to achieve the above object, the narrow width detection method for each terminal group of the present invention provides a means for storing a connection line counter indicating the blockage of the registered terminal group in a telephone network having a registered terminal group and an exchange; A storage means for an overflow call counter indicating the number of overflow calls in a group, and a congestion detection means for successively writing/writing to both storage means and detecting a narrow width of the registered terminal group, and the narrow width detection means is configured to detect a narrow width of the registered terminal group. After correcting the overflow call counter at the end of a call from the registered terminal group received from the registered terminal group, the connection line counter is determined to be idle when a connection request is made to the registered terminal group, and if all lines are occupied, the overflow call counter is updated. The feature is that the content is compared with a separately determined reference value to judge the congestion situation of the registered terminal group.

[Embodiments of the invention]

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

FIG. 1 is a block diagram of a telephone network showing an embodiment of the present invention. In Figure 1, ■ is a general subscriber terminal (
2 is a group of registered terminals that have one or more lines for one terminal number, 3 and 4 are subscriber exchanges 1, 5 and 6 are telephone lines, and 7 is a group of registered terminals that have one or more lines for one terminal number. Trunk switch, 8
is a transmission path, 9 is a congestion detection control device, 1o is a memory, 11
12 is a connection line counter for managing the number of connectable lines for each terminal number, and counts the number of simultaneous connections of a terminal group; 12 is an overflow call counter for counting overflow calls for each terminal number.

The terminal number of the registered terminal group 2 and terminal information such as the number of terminals (9) and the number of lines are registered in the trunk switch 7 and narrow detection control device 9, respectively. The narrow width detection control device 9 stores the number of lines of the terminal group in correspondence with the terminal number of the registered terminal group 2, and also reads out the connected line counter 11 and the overflow call counter 12, which have space in the memory 10. Write. It also notifies the trunk switch 7 of the blocked state of the registered terminal group 2 and the like.

FIG. 2 is a flowchart showing the operation of one embodiment of the present invention.

Now, when the terminal number of the registered terminal group 2 is dialed from the general terminal 1, the general terminal 1 is connected to the trunk exchange 7 via the subscriber line exchange 32 and the telephone line 5 in a general manner ( Step 101).

When the trunk exchange 7 that has received the terminal number identifies that it is the number of the registered terminal group 2 (step 102), it sends the received terminal number to the thin width detection control device w9 through the transmission line 8. After notifying the terminal number 2 that a "call" connection request has occurred (step 103), the subscriber line exchange 4 registers the call connection according to the blocking status number from the narrow width detection control device 9. Perform on terminal group 2 (step 10
4).

The congestion detection control device 9 uses the notification of the connection request, that is, the received terminal number of the registered terminal group 2 (step 201
), as a result of reading the connection line counter 11 indicating the number of free terminals in the registered terminal group 2 (step 202), the terminal f
When there is an i (vacant) terminal and a "call" connection is possible (connection line counter value - 0), 1 is subtracted from the value of the connection line counter 11 of registered terminal group 2 (step 2).
03゜205), there is no unconnected (vacant) terminal and the connected line counter value = 0), that is, all terminals in registered terminal group 2 are busy and ``call'' connection is impossible, the registered terminal 1 is added to the value of the overflow call counter 12 of group 2 to update the overflow call counter (step 204).

After that, any receiving terminal among registered terminal group 2 disconnects (
If the call is terminated), the trunk exchange 7 that formed the communication path for the call detects the disconnection signal (step 10).
6), Registered terminal.

If so (step 107), similarly to the connection of the "call", the narrow detection control device 9 is notified through the transmission line 8 that the terminal of the registered terminal group 2 has disconnected (end of call) ( Step 108).

When the thin width detection control device [9 receives a disconnection signal which is a call termination notification (step 207), it uses the terminal number of the registered terminal group 2 to connect the connection line for which the number of vacant terminals of the registered terminal group 2 is indicated. After adding 1 to the value of counter 11 (step 208
), the value of the overflow call counter 12 corresponding to the registered terminal group 2 is compared with a preset constant threshold value (step 209). If the result exceeds the threshold, the registered terminal group 2 determines that the width is narrow, and executes width narrowing processing such as creating a message to alleviate the narrow width (steps 210, 211). If the threshold is not exceeded, it is determined that the narrow width state of the registered terminal group 2 has been canceled, and narrow width cancellation processing such as resetting the narrow width flag is executed (steps 212 and 213). After executing the above processing, as a post-processing of the overflow call counter 12 (step 214), a) the value of the overflow call counter 12 used for comparison in step 209 is cleared to 0; Therefore, the counter value becomes 1 at the next overflow call. b) The value of the overflow call counter 12 used for comparison in step 209 is obtained by a predetermined function formula obtained by arithmetic averaging from information of the past several times (for example, the peak value of overflow calls) (for example, in step 21
Overflowing call count with 4. However, X: counter value, n=o, 1.
2) etc.) and use it for the next narrow width determination.

The third is a flowchart showing the operation of another embodiment of the present invention.

In the above-mentioned embodiment, as shown in FIG. 2, after receiving the call termination notification of the registered terminal group 2 from the trunk exchange 7, the overflow call counter 12 is compared with a threshold value (reference value) to determine whether the call width is thin. In other embodiments, as shown in FIG. 3, after receiving the connection request notification from the trunk switch 7 to the registered terminal group 2, the overflow call counter 12 performs post-processing. The overflow call counter 12 is compared with a threshold value (reference value) to determine whether the width is thin. The difference between the above two is that in Fig. 3, when the registered terminal group 2 is busy, the narrow situation is determined every time a ``call'' connection is requested, whereas in Fig. 2, when the registered terminal group 2 2 is busy, any terminal disconnects, that is, when the call ends, a similar narrow situation is determined.

In the embodiments described so far, the threshold value in Step 209 for determining the thin width state and the threshold value for canceling the narrow width state have been set to the same value, but independent values may be selected for each. It is possible. Comparison and determination between the threshold value to be released at that time and the overflow call counter 12 can be performed after step 212.

■The connection request to the congestion detection control device 9, notification of call termination, and call disconnection detection were performed by the trunk switch 7, but by connecting the transmission line 8 to the subscriber switch, the above functions can be implemented. It is also possible to perform this at a subscriber line exchange.

■The value of the connection line counter 11 was used to determine whether the registered terminal group 2 was blocked in steps 202 and 203, but this determination is made by directly monitoring the subscriber line in the subscriber line exchange 4. It is also possible to use a thin width detection control device!
The determination can also be made by using a new transmission path from 9 to reach the subscriber line exchange 4.

(2) Rather than providing the thin width detection control device i9 and the memory 10 independently as shown in FIG. 1', the trunk line exchange 7.
Subscriber line exchange 3, 4. It is also possible to install it in conjunction with any of the other exchanges not shown in FIG. 1 for economical purposes.

In this way, in a single telephone network as shown in FIG. An overflow call counter 12 is provided, and the contents of the two counters are referred to and updated when connecting and disconnecting to the registered terminal group, so the more lines the registered terminal group owns, the faster the number of lines within a unit time. The number of disconnections will increase, and the measurement interval for the number of overflow calls will become shorter. On the other hand, if the number of lines held is small, the measurement interval for the number of overflow calls becomes longer, so the number of overflow calls can be measured independently of the number of lines held. A fixed threshold, independent of the number, can be used.

〔Effect of the invention〕

As explained above, according to the present invention, the overflow call counter for determining the narrowness of the registered terminal group is updated and corrected at the end of the connection request 2 call to the registered terminal group. It is possible to determine that the width is narrow based on a constant, independent reference value, and the reliability of the narrow width determination can be improved without increasing the memory capacity for the counter.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of the configuration of a telephone network showing an embodiment of the present invention, and FIGS. 2 and 3 are flowcharts showing the operation of the embodiment. General subscriber terminals (general terminals), 2: Registered terminal group, 3
, 4: Subscriber line exchange, 5, 6: Call line, 7: Trunk line exchange, 8: Transmission line, 9: Congestion ring detection control device, 10: Memory, 11: Connection line counter, 12: Overflow call counter 2 (a) ,,) 3rd

Claims (2)

[Claims] (1) In a telephone network having a group of registered terminals and a switch, storage means for a connection line counter indicating whether the registered terminal group is idle; - storage means for an overflow call counter indicating the number of overflow calls of the registered terminal group; Congestion detection means is provided for detecting continuation/writing to both storage means and congestion of the registered terminal group, and the congestion detection means corrects the overflow call counter upon termination of a call of the registered terminal group received from the exchange. After doing so, the connection request to the registered terminal group is used to determine if the connection line is empty or blocked.If all lines are blocked, the overflow call counter is updated, and the content is compared with a separately determined standard value, and the registered terminal A congestion detection method for each terminal group, which is characterized by determining the congestion status of a group. (2) The congestion detection means determines whether a connection line is blocked from a connection line counter in response to a connection request to a group of registered terminals received from the exchange, and if all lines are blocked, updates an overflow call counter and then connects a group of registered terminals. Claim 1, characterized in that the content of the overflow call counter is compared with a separately determined reference value when a call ends, the congestion situation of the registered terminal group is determined, and the overflow call counter is corrected. Width detection method for each terminal group.