JPH0586102B2 - - Google Patents

Description

[Detailed Description of the Invention] [Summary] Regarding a call restriction priority control method in an exchange that restricts calls from accommodated subscribers and incoming calls from other exchanges, it is possible to The purpose of this system is to allow incoming calls from other exchanges that are occupying resources to be accepted preferentially, and to determine the number of outgoing calls that can be accepted within a specified period from accommodated subscribers and the number of calls that can be made by a subscriber connected by a trunk line. The permissible number of incoming accepted calls that are allowed to arrive from other exchanges within a predetermined period of time is determined, and if the number of outgoing and accepted calls made by a subscriber within a predetermined period exceeds the number of outgoing and accepted calls that are accepted, , restricts calls from subscribers, and restricts calls from other exchanges if calls arrive from other exchanges within a predetermined period and the number of accepted calls exceeds the number of accepted calls. The number of accepted calls is compared with the number of accepted accepted calls, and if the difference between the accepted number of accepted calls and the number of accepted calls is less than a predetermined value, the number of accepted accepted outgoing calls is determined. is reduced by a predetermined number of modified calls,
The apparatus is configured to provide a permissible number of accepted calls modification means for increasing the number of incoming permissible accepted calls by the corrected number of calls.

[Industrial application field]

The present invention relates to an exchange, and particularly to a call restriction priority control system in an exchange that restricts calls from accommodated subscribers and incoming calls from other exchanges.

The exchange performs the necessary switching processing for calls originating from accommodated subscribers as well as for incoming calls from other exchanges connected via trunk lines, but these calls or incoming calls are not anticipated in advance. If the number increases beyond the specified value, the exchange becomes overloaded, resulting in an increase in connection time and a decrease in connection completion rate.

In order to prevent such deterioration of exchange services, the load applied to the exchange is monitored, and if an overload condition is assumed to occur, the acceptance of calls from subscribers or incoming calls from other exchanges is restricted. Regulations are in place.

[Conventional technology]

FIG. 3 is a diagram showing an example of a conventional call regulation method.

This conventional call restriction system was filed by the same applicant in Japanese Patent Application No. 191763/1983 (Japanese Patent Application Laid-Open No. 70844/1983) and has already been published.

In FIG. 3, when a subscriber 111 accommodated via a subscriber line 112 makes a call, a call detection unit 121 provided in an interface part that accommodates the subscriber line in the exchange, for example, detects the call. It detects the call signal OC and transmits the call signal OC to a call control unit 131 provided in a part in charge of call processing in an exchange, for example, to notify the subscriber 111 of the call.

The call control unit 131 that received the call signal OC,
If the exchange determines that the call can be accepted through the process described later, it activates the call processing unit 132 to accept and process the call detected by the call detection unit 121, and also causes the outgoing accepted calls counting unit 141 to accept the call detected by the call detection unit 121. subtraction signal
Convey D _p .

On the other hand, the permissible number of accepted calls determination unit 142 determines the number of outgoing accepted calls N _ap accepted and processed by the call processing unit 132 within a predetermined period of time (for example, one second), the usage rate of the part in charge of the call processing, etc. Call processing unit 13
2 is the allowable number of outgoing calls that can be accepted within the specified time
NI _p is calculated and transmitted to the outgoing accepted call number modification unit 144 via the allowable accepted call number holding unit 143.

The number of outgoing accepted calls correction unit 144 extracts the outgoing counted value TI _p held by the number of outgoing accepted calls counting unit 141,
The total value (TI _p + NI _p ) added to the transmitted permissible number of outgoing accepted calls NI _p is calculated by the outgoing accepted call number counting unit 141.
Set to .

Note that in the initial state, the outgoing count value TI _p of the outgoing accepted call count counting unit 141 is set to zero, so the outgoing count value TI _p becomes the number of outgoing allowable accepted calls by setting the total value (TI _p + NI _p ). NI is equal to _p .

The number of outgoing accepted calls counting unit 141 is the outgoing call control unit 13
Each time the subtraction signal D _p is transmitted, 1 is subtracted from the transmitted count value TI _p .

The outgoing accepted call number counting unit 141 calculates the outgoing counted value TI _p
It monitors the positive and negative of the
It is output as P _p and transmitted to call restriction instructing section 145 and initializing section 147.

The call restriction instruction unit 145 causes the call control unit 131 to transmit the call restriction flag F _p when the positive/negative display signal P _p transmitted from the outgoing accepted call number counting unit 141 indicates a negative state, When the positive/negative display signal P _p indicates a positive state, transmission of the call restriction flag F _p is stopped.

The call control unit 131 sends a call signal while receiving the call restriction flag F _p from the call restriction instruction unit 145.
When the OC is transmitted, the call restriction unit 146 is activated in place of the call processing unit 132 according to the conditions of the subscriber 111, and the call from the subscriber 111 is restricted without being accepted.

When a predetermined period of time (1 second) has elapsed in this state, the number of outgoing accepted calls correction unit 144 changes the current outgoing count value TI _p of the outgoing accepted call number counting unit 141 and the number of outgoing allowable accepted calls to be transmitted, as described above. The total value (TI _p +NI _p ) obtained from NI _p is set in the outgoing accepted call number counting section 141.

Therefore, if the number of outgoing calls from subscriber 111 is small in the previous period and the outgoing counting value TI _p is 1 or more, the number of outgoing calls that can be accepted without being subject to restrictions will increase in the next period, and During the period, the number of calls from subscriber 111 is large, and the call count value TI _p
If is a negative value, the number of outgoing calls that can be accepted without being regulated will decrease in the next period.

Note that in order to prevent the total value (TI _p + NI _p ) from continuing to increase even if there are consecutive periods in which the number of outgoing calls from the subscriber 111 is small, the initialization unit 147 sets the number of calls for a predetermined period (for example, 10 After confirming that the positive/negative display signal P _p is displaying a positive state every second (seconds), the outgoing accepted call number counting unit 141 is initialized and the outgoing counting value TI _p is set to zero.

On the other hand, when a call arrives from another exchange 211 connected to the trunk line 212, the incoming call detection unit 221 provided in the interface section that accommodates the trunk line in the exchange detects the incoming call, and, for example, the call processing in the exchange is performed. The incoming call signal IC is transmitted to the incoming call control unit 231 provided in the part that controls the other exchange 211.
Notify you of an incoming call.

The incoming call control unit 231 that received the incoming call signal IC,
If the exchange determines that the incoming call can be accepted through the process described below, it activates the incoming call processing unit 232 to accept and process the incoming call detected by the incoming call detection unit 221, and also causes the incoming call number counting unit 241 to accept the incoming call detected by the incoming call detection unit 221. Subtraction signal D _i
Communicate.

On the other hand, the allowable number of accepted calls determining unit 242 determines the number of incoming accepted calls N _ai accepted and processed by the incoming call processing unit 232 within a predetermined period of time (for example, 1 second), the usage rate of the part that controls the call processing, etc. Call processing unit 23
2 is the number of incoming calls that can be accepted within the specified time.
NI _i is calculated and transmitted to the incoming accepted call number modification unit 244 via the allowable accepted call number holding unit 243.

The received call number correction unit 244 extracts the received call count value TI _i held by the received call number counting unit 241,
The total value (TI _i +NI _i ) added to the transferred number of permissible received calls NI _i is set in the number of received received calls counter 241 .

Note that in the initial state, the incoming call count value TI _i of the incoming call reception counting unit 241 is set to zero, so
Incoming count value TI _i by setting the total value (TI _i + NI _i )
is equal to the number of accepted incoming calls NI _i .

The incoming call reception number counting unit 241 is connected to the incoming call control unit 23
Each time the signal D _i subtracted from 1 is transmitted, the incoming count value
Subtract 1 from TI _i .

The incoming call acceptance number counting unit 241 calculates the incoming call count value TI _i
It monitors the positive and negative of the
It is output as P _i and transmitted to the incoming call restriction instruction section 245 and the initialization section 247.

When the positive/negative display signal P _i transmitted from the incoming call acceptance number counting unit 241 indicates a negative state, the incoming call restriction instruction unit 245 transmits the incoming call restriction flag F _i to the incoming call control unit 231, When the positive/negative display signal P _i indicates a positive state, transmission of the incoming call restriction flag F _i is stopped.

The incoming call control unit 231 transmits the incoming call signal while receiving the incoming call restriction flag F _i from the incoming call restriction instructing unit 245.
When the IC is transmitted, the incoming call restriction unit 246 is activated in place of the incoming call processing unit 232 according to the conditions of the other exchange 211, and the incoming call from the other exchange 211 is restricted without being accepted.

When a predetermined period of time (1 second) has elapsed in this state, the number of accepted calls correction unit 244 changes the current number of incoming calls TI _i of the number of accepted calls counting unit 241 and the number of accepted accepted calls to be transmitted, as described above. The total value (TI _i +NI _i ) obtained from NI _i is set in the incoming accepted call number counting unit 241.

Therefore, if the number of incoming calls from other exchanges 211 in the previous period is small and the incoming call count value TI _i is 1 or more, the number of outgoing calls that can be accepted without restrictions will increase in the next period, and The number of calls received from other exchanges 211 during the period was large, and the number of calls received was
If TI _i takes a negative value, the number of incoming calls that can be accepted without being regulated will decrease in the next period.

In addition, in order to prevent the total value (TI _i + NI _i ) from continuing to increase even if there are consecutive periods in which the number of incoming calls from other exchanges 211 is small, the initialization unit 247 sets a predetermined period (for example, 10 After confirming that the positive/negative display signal P _i is displaying a positive state every second), the incoming call acceptance number counting section 241 is initialized, and the incoming call count value TI _i is set to zero.

[Problem to be solved by the invention]

As is clear from the above explanation, in conventional call regulation systems, calls originating from subscriber 111 and incoming calls from other exchanges 211 are independently regulated using the same method, and in particular, incoming calls are regulated by the same method. There was no priority acceptance.

However, since the resources occupied by incoming calls from other exchanges 211 are far greater than those by calls originating from subscriber 111, by restricting incoming calls, the resources occupied until then are held invalid. Therefore, there was a risk that the efficiency of the communication network would decrease.

SUMMARY OF THE INVENTION An object of the present invention is to make it possible to preferentially accept incoming calls from other exchanges that occupy more resources than calls from subscribers.

[Means to solve the problem]

FIG. 1 is a diagram showing the principle of the present invention.

In FIG. 1, 1 is an exchange, 111 is a subscriber accommodated in the exchange 1, and 211 is another exchange connected to the exchange 1 by a trunk line 212.

In addition, N _p is the number of calls that can be accepted from subscriber 111 within a predetermined period, and _N
N ap is the number of incoming accepted calls that are allowed to arrive from subscriber 111 within a predetermined period, N _ap is the number of outgoing accepted calls made by subscriber 111 within a predetermined period and accepted by exchange 1, and N _ai is a predetermined number from other exchanges 211. This is the number of incoming calls received and accepted by the exchange 1 within the period.

Reference numeral 2 denotes an allowable number of accepted calls modifying means provided in the exchange 1 according to the present invention.

[Effect]

The exchange 1 restricts calls from the subscriber 111 when the number of outgoing accepted calls N _ap exceeds the number of outgoing permissible accepted calls N _p , and the number _of incoming accepted calls N If the number exceeds _i , incoming calls from other exchanges 211 are restricted.

The allowable number of accepted calls modification means 2 determines the number of incoming allowable accepted calls.
N _i and the number of incoming accepted calls N _ai are compared, and if the difference between the allowable number of incoming accepted calls N _i and the number of incoming accepted calls N _ai falls below a predetermined value, the number of outgoing allowable accepted calls N _p is decreased by a predetermined modified number of calls α, and the number of incoming permissible accepted calls N _i is increased by the modified number of calls α.

Therefore, when the number of incoming calls from other exchanges approaches a state that requires regulation, by allocating a portion of the number of allowed outgoing calls to the number of allowed incoming calls, the number of incoming calls from other exchanges can be reduced. This means that calls from other parties are accepted with priority over calls made by other parties, thereby improving the efficiency of the communication network.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings. FIG. 2 is a diagram showing a call regulation method according to an embodiment of the present invention. Note that the same reference numerals indicate the same objects throughout the figures.

In FIG. 2, an allowable accepted call number modification section 251 is provided as the allowable accepted call number modifying means 2 in FIG.

In FIG. 2, a call from subscriber 111 is
As in FIG. 3, the call is detected by the call detection section 121, the call is processed by the call control section 131 and the call processing section 132, and the regulation of the call from the subscriber 111 is as shown in FIG. Similarly, the outgoing accepted call number counting section 141 and the allowable accepted call number determining section 1
42, the allowable number of accepted calls holding section 143, the number of outgoing accepted calls modification section 144, the outgoing call restriction instruction section 145, the outgoing call restriction section 146, and the initialization section 147 execute the process.

On the other hand, when a call arrives from another exchange 211 connected to the trunk line 212, the incoming call detection unit 221 detects the incoming call and transmits an incoming call signal IC to the incoming call control unit 231, as in FIG. , other exchange 21
Notify of an incoming call from 1.

The incoming call control unit 231 that received the incoming call signal IC,
If the incoming call restriction flag F _i has not been transmitted from the incoming call restriction instruction unit 245, the incoming call processing unit 232 is started to accept and process the incoming call detected by the incoming call detection unit 221, and also accepts the incoming call. The subtraction signal D _i is transmitted to the number counting section 241 .

On the other hand, the allowable number of accepted calls determining unit 242, like the allowable number of accepted calls determining unit 242 in FIG _. , and the usage rate of the part in charge of call processing, etc., the incoming call processing unit 2
32 calculates the number of incoming allowable accepted calls NI _i that can be accepted within a predetermined time, and transmits the calculated number to the incoming accepted call number correcting unit 244 via the allowable accepted call number holding unit 243 .

As in FIG. 3, the incoming accepted call number correction unit 244 extracts the incoming counted value TI _i held by the incoming accepted call number counting unit 241 and adds it to the transmitted incoming allowable number of accepted calls NI _i . The value (TI _i +NI _i ) is set in the incoming accepted call count counting unit 241.

Note that in the initial state, the incoming call count value TI _i of the incoming call reception counting unit 241 is set to zero, so
Incoming count value TI _i by setting the total value (TI _i + NI _i )
is equal to the number of accepted incoming calls NI _i .

As in FIG. 3, the incoming call reception number counting unit 241 subtracts 1 address from the incoming call count value TI _i every time the subtraction signal D _i is transmitted from the incoming call control unit 231.

The incoming call reception number counting unit 241 monitors whether the incoming call count value TI _i is positive or negative, as in FIG.
The monitoring result is output as a positive/negative display signal P _i and transmitted to the incoming call restriction instruction section 245 and the initialization section 247.

Similarly to FIG. 3, when the positive/negative display signal P _i transmitted from the incoming call acceptance number counting unit 241 indicates a negative state, the incoming call restriction instructing unit 245 controls the incoming call control unit 231 to control the incoming call. When the restriction flag F _i is transmitted and the positive/negative display signal P _i indicates a positive state, the transmission of the incoming call restriction flag F _i is stopped.

The incoming call control unit 231 receives the incoming call restriction flag F _i from the incoming call restriction instructing unit 245 as in FIG.
If the incoming call signal IC is transmitted in a state where the
Incoming calls from other exchanges 211 are restricted without being accepted.

When a predetermined period of time (1 second) has elapsed in this state, the number of accepted calls correction unit 244 changes the current number of incoming calls TI _i of the number of accepted calls counting unit 241 and the number of accepted accepted calls to be transmitted, as described above. The total value (TI _i +NI _i ) obtained from NI _i is set in the incoming accepted call number counting unit 241.

Note that, as in FIG. 3, the initialization unit 247 performs
After confirming that the positive/negative display signal P _i is displaying a positive state, the incoming call accepted call number counting unit 241 is initialized and the incoming call count value TI _i is set to zero.

In the above process, the incoming call count value TI _i is the incoming allowable number of accepted calls NI _i set by the incoming call acceptance number correction unit 244, or the total value ( _{TI i} +NI _i ) and the number of accepted calls N _ai for which the incoming call control unit 231 has accepted incoming call processing by the incoming call processing unit 232.

On the other hand, the allowable accepted call number correction unit 251 extracts the incoming call count value TI _i from the incoming call count count unit 241 at every predetermined period (1 second), and the extracted incoming call count value TI _i falls below a predetermined value. Then, the number of incoming calls from other exchanges 211 increases, and it is determined that the state is approaching a state that requires regulation.

If this state continues for a predetermined number of periods (for example, 3 periods), the allowable number of accepted calls modification unit 251 calculates the number of outgoing allowable accepted calls NI _p calculated by the allowable number of accepted calls determining unit 142. In addition to subtracting a predetermined corrected number of calls α (for example, about 5% of the number of outgoing allowable accepted calls NI _p ), the allowable accepted call number determination unit 24
The corrected number of calls α is added to the incoming call count value NI _i , which is the number of incoming allowable accepted calls calculated in step 2.

Thereafter, calls from subscriber 111 are judged to be regulated based on the number of permissible outgoing calls NI _p ′, which is reduced by the corrected number of calls α, and calls received from other exchanges 211 are reduced by the corrected number of calls α. Increased number of accepted incoming calls
The necessity of regulation is determined based on NI _i ′.

As is clear from the above explanation, according to this embodiment, the allowable accepted call number modification unit 251 adjusts the incoming call count TI _i
When it is determined that the state is approaching a state where it is necessary to restrict incoming calls from other exchanges 211, the number of permissible incoming calls accepted NI _i is increased by the modified number of calls α, and incoming calls from other exchanges 211 are prioritized. We will accept it.

At the same time, by reducing the number of permissible outgoing calls NI _p by the corrected number of calls α, an increase in the usage rate of the part in charge of call processing can be avoided.

It should be noted that FIG. 2 is only one embodiment of the present invention, and for example, the number of outgoing accepted calls counting section 141 to the initializing section 147 that control the restriction on calls from the subscriber 111 and the number of outgoing calls from the other exchange 211 are shown. The incoming reception call counting unit 241 to the initialization unit 247 that control restrictions on incoming calls are not limited to being provided independently, and it is possible to share some or all of them; In this case, the effects of the present invention remain the same.

〔Effect of the invention〕

As described above, according to the present invention, in the exchange,
When the number of incoming calls from other exchanges approaches a state that requires regulation, by allocating a part of the number of outgoing allowable accepted calls to the number of incoming accepted calls, incoming calls from other exchanges are reduced from subscribers. Calls are accepted with priority over outgoing calls, improving the efficiency of the communication network.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the principle of the present invention, FIG. 2 is a diagram showing a call regulation method according to an embodiment of the present invention, and FIG. 3 is a diagram showing an example of a conventional call regulation method. In the figure, 1 is an exchange, 2 is an allowable accepted call number modification means, 111 is a subscriber, 112 is a subscriber line, 1
21 is a call detection unit, 131 is a call control unit, 132
1 is a call processing unit, 141 is an outgoing reception call counting unit, 1
42 and 242 are allowable accepted call number determination units; 143
and 243 is an allowable accepted call number holding unit, 144 is an outgoing accepted call number correction unit, 145 is a call restriction instruction unit, 1
46 is a call regulation section, 147 and 247 are initialization sections, 211 is another exchange, 212 is a trunk line, 221
is an incoming call detection unit, 231 is an incoming call control unit, 232 is an incoming call processing unit, 241 is an incoming call reception counting unit, 244
Reference numeral 245 indicates an incoming call acceptance number correction unit, 245 an incoming call restriction instruction unit, and 246 an incoming call restriction unit.

Claims (1)

[Scope of Claims] 1. The permissible number N _p of outgoing calls accepted within a predetermined period of time from an accommodated subscriber 111 and the permissible number of incoming calls allowed to be received within a predetermined period from another exchange 211 connected by a trunk line 212. Define the number of accepted calls N _i ,
restricting calls from the subscriber 111 when the number N _ap of outgoing accepted calls made and accepted from the subscriber 111 within a predetermined period exceeds the number of outgoing accepted accepted calls N _p ; An exchange that restricts incoming calls from the other exchange 211 when the number N _ai of incoming accepted calls received and accepted from the other exchange 211 within a predetermined period exceeds the number N _i of permissible incoming accepted calls. 1
In, the number of permissible calls to and from N _i and the number of calls to accept incoming calls.
N _ai , and if the difference between the permissible number of incoming calls N _i and the number N _ai of incoming calls is less than a predetermined value, the number of permissible outgoing calls N _p is determined in advance. A call restriction priority control system characterized in that the permissible number of accepted calls is modified by means 2 for decreasing the number of incoming permissible accepted calls N _i by the corrected number of calls α and increasing the number of incoming permissible accepted calls N i by the corrected number of calls α.