JPH01278156A - Call regulation preference control system - Google Patents

Abstract

PURPOSE:To improve the efficiency of a communication network by appropriating a part of the number of outgoing allowable acceptance calls to the number of incoming allowable acceptance calls when the number of incoming calls from another exchange approaches a state which requires regulation. CONSTITUTION:The allowable acceptance call number correction means 2 of an exchange 1 compares the number Ni of incoming allowable acceptance calls with the number Nai of incoming acceptance calls, and reduces the number No of outgoing allowable acceptance calls by a prescribed number (alpha) of correction calls decided in advance when difference between the number Ni of incoming allowable acceptance calls and the number Nai of incoming acceptance calls goes less than a value decided in advance, and increases the number Ni of incoming allowable acceptance calls by a corrected number (alpha) of calls. Therefore, the incoming from another exchange is accepted in preference to call issuing from a subscriber by appropriating a part of the number of outgoing allowable acceptance calls to the number of incoming allowable acceptance calls when the number of incoming calls from another exchange approaches the state which requires the regulation. In such a way, the efficiency of the communication network can be improved.

Description

[Detailed Description of the Invention] [Summary] Call restriction priority control system in an exchange that restricts calls from accommodated subscribers and incoming calls from other exchanges requires more resources than calls from subscribers. The purpose of this system is to allow incoming calls from other occupied exchanges to be accepted preferentially, and to determine the number of calls that can be accepted from accommodated subscribers within a specified period, as well as the number of calls that are allowed to be made by accommodated subscribers within a specified period, and those connected by trunk lines. The permissible number of incoming accepted calls that are allowed to arrive from the exchange within a predetermined period is determined, and if a subscriber makes a call within a predetermined period and the number of accepted outgoing calls exceeds the permissible number of outgoing accepted calls, the subscriber An exchange that restricts calls from other exchanges and restricts calls from other exchanges when calls are received from other exchanges within a predetermined period and the number of accepted calls exceeds the number of accepted calls. , compares the allowable number of incoming calls to be accepted and the number of incoming calls to be accepted, and if the difference between the allowable number of incoming calls to be accepted and the number of incoming calls to be accepted is less than a predetermined value, the allowable number of outgoing calls to be accepted is set to a predetermined value. The apparatus is configured to provide a permissible number of accepted calls modification means for decreasing the number of incoming permissible accepted calls by the corrected number of calls and increasing the number of incoming permissible accepted calls by the corrected number of calls.

[Industrial application field]

TECHNICAL FIELD The present invention relates to a switching system, and particularly to a switching system that handles calls from accommodated subscribers,
This invention relates to a call restriction priority control method in an exchange that restricts 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 expected 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 proposed in a patent application filed in 1983 by the same applicant.
-191763 (Japanese Unexamined Patent Publication No. 61-70844) 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 at an interface part that accommodates the subscriber line in the exchange detects the call. For example, a call signal O is sent to a call control unit 131 provided in a section in charge of call processing in an exchange.
C and notifies the subscriber 111 of the call.

The call control unit 131 that has received the call signal OC activates the call processing unit 132 if the exchange determines that the call can be accepted through the process described later, and receives the call detection unit 121. The call is accepted and processed, and a subtraction signal is sent to the outgoing accepted call number counting unit 141. Communicate.

On the other hand, the permissible accepted number of calls determining unit 142 determines the number of calls that can be accepted for a predetermined period of time (for example, 1
The call processing unit 132 determines which calls can be accepted within a predetermined time based on the number of outgoing accepted calls N1° that were accepted and processed by the call processing unit 132 within a given period of time (seconds), the usage rate of the part that controls the call processing, etc. Allowable number of accepted calls N! , 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 is the number of outgoing accepted calls counting unit 14
Transmission count value TI held by 1. , and the number of transmitted permissible outgoing calls N1. and the total value (TI. 10NN
, ) are set in the outgoing accepted call number counting section 141.

Note that in the initial state, the outgoing call count value TI of the outgoing accepted call count counting unit 141 is the outgoing call count value TI. is set to zero, so the total value (T
1. +NI. ), the transmission count value T1. is equal to the number of outgoing and accepted calls N+.

The outgoing accepted call number counting unit 141 subtracts 1 from the outgoing count value TM every time the subtraction signal D0 is transmitted from the outgoing call control unit 131.
Subtract the address.

The outgoing/accepted call count counting section 141 calculates the outgoing/accepted call count TI. The monitoring result is outputted as a positive/negative display signal P0 and transmitted to the call restriction instructing unit 145 and the initializing unit 147.

When the positive/negative display signal P0 transmitted from the outgoing accepted call number counting unit 141 indicates a negative state, the outgoing call restriction instruction unit 145 transmits the outgoing call restriction flag F0 to the outgoing call control unit 131,
When the positive/negative display signal P0 indicates a positive state, the call restriction flag F. stop transmitting.

The call control unit 131 receives the call restriction flag F from the call restriction instruction unit 145. If the calling signal OC is transmitted while the subscriber 1110 has received the
Calls from 11 will be 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 T1. and the number of outgoing and accepted calls Nl to be transmitted. The total value calculated from (T10
+NI. ) is set in the outgoing accepted call number counting unit 141.

Therefore, in the previous period, the number of outgoing calls from subscriber 111 was small, and outgoing call count T1. is 1 or more, the number of outgoing calls that can be accepted without being regulated increases in the next period, and the number of outgoing calls from subscriber 111 in the previous period is large, and the outgoing counting value TI0 becomes a negative value. If this happens, the number of outgoing calls that can be accepted without being subject to restrictions will decrease in the next period.

In order to prevent the total value (T1.+NI.) from continuing to increase even if there are consecutive periods in which the number of calls made by 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 P0 is displaying a positive state every second), the outgoing accepted call number counting section 141 is initialized and the outgoing call count value TI is set. Set to O.

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 part that accommodates the trunk line in the exchange detects the incoming call, and, for example, performs call processing in the exchange. The incoming call signal IC is transmitted to the incoming call control unit 231 provided in the controlling section, and the incoming call from another exchange 211 is notified.

The incoming call control unit 231 that has received the incoming call signal IC activates the incoming call processing unit 232 when the exchange determines that it is possible to accept the incoming call through the process described later. The call is accepted and processed, and a subtraction signal D1 is transmitted to the incoming accepted call number counting section 241.

On the other hand, the permissible accepted number of calls determination unit 242 determines the number of calls that can be accepted for a predetermined period of time (for example, 1
Based on the number N18 of incoming calls accepted and processed by the incoming call processing unit 232 within 1 second), the usage rate of the part that controls the call processing, etc., the incoming call processing unit 232 determines whether the incoming call can be accepted within a predetermined time. Number of calls received N1. is calculated and transmitted to the incoming accepted call number modification unit 244 via the allowable accepted call number holding unit 243.

The incoming accepted call number correction unit 244 is the incoming accepted call number counting unit 24.
Extract the incoming call count value TI held by N1. The total value (Tri +N
Ii) is set in the incoming accepted call number counting section 241.

In addition, in the initial state, the incoming call count value TI of the incoming call acceptance count counting unit 241 is set to zero, so the total value (T
li + NIi ), the incoming call count value TI becomes the number of incoming allowable accepted calls N1. is equal to

The incoming accepted call number counting unit 241 calculates the incoming call count value T1. from 1
Subtract the address.

The incoming call acceptance counting unit 241 monitors whether the incoming call count T1 is positive or negative, outputs the monitoring result as a positive/negative display signal P, and transmits it to the incoming call restriction instruction unit 245 and the initialization unit 247.

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

When the incoming call control unit 231 receives the incoming call signal IC while receiving the incoming call restriction flag F from the incoming call restriction instructing unit 245, the incoming call control unit 231 controls the incoming call processing unit according to the conditions of the other exchange 211. 232, the incoming call restriction unit 246 is activated to restrict incoming calls from other exchanges 211 without accepting them.

When a predetermined period of time (1 second) has elapsed in this state, the received call number modification unit 244 changes the current received call count value T1. The total value (TI,
+NIl is set in the incoming accepted call number counting section 241.

Therefore, in the previous period, the number of incoming calls from other exchanges 211 was small, and the incoming call count T1. If is 1 or more, the number of outgoing calls that can be accepted without being regulated will increase in the next period, and the number of incoming calls from other exchanges 211 in the previous period will be large, and the incoming call count value TI will be a negative value. In this case,
In the next period, the number of incoming calls that can be accepted without being subject to restrictions will decrease.

Furthermore, in order to prevent the total value (T+Nr't) 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, every 10 seconds), after confirming that the positive/negative display signal Pi is displaying a positive state, the incoming call acceptance number counting section 241 is initialized, and the incoming call count value T1. Set to 0.

[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, resources that have been occupied until then become inactive, which could lead to a decrease in the efficiency of the communication network.

SUMMARY OF THE INVENTION An object of the present invention is to make it possible to preferentially accept incoming calls from other exchanges, which 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 a key in another exchange connected to the exchange 1 by a trunk line 212.

In addition, No is the number of calls allowed to be received from subscriber 111 within a predetermined period, N is the number of calls allowed to be received from other exchanges 211 within a predetermined period, and N a o is the number of calls allowed to be received from subscriber 111 within a predetermined period. N 11 i is the number of outgoing calls made and accepted by exchange 1 within a predetermined period, and is the number of calls received by exchange 1
This is the number of received calls received by the exchange 1 within a predetermined period.

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

[Effect]

In exchange 1, the number of outgoing and accepted calls N1゜ is equal to the number of outgoing and permissible accepted calls N1゜
If the number exceeds 0, calls from the subscriber 111 are restricted, and the number of received calls N8. If N exceeds the permissible number of incoming calls N, incoming calls from other exchanges 211 are restricted.

The allowable number of accepted calls modification means 2 compares the allowable number of received calls N and the number N1 of accepted calls, and determines a predetermined difference between the allowable number of received calls N and the number N of accepted calls. If the number of outgoing allowable accepted calls N0 is reduced by a predetermined modified call number α, and the incoming allowable accepted call number N1 is reduced to the revised call number α.
increase only.

Therefore, when the number of incoming calls from other exchanges approaches a state that requires regulation, by allocating a part of the number of allowed outgoing calls to the number of allowed incoming calls, the number of incoming calls from other exchanges becomes The call will be accepted with priority over calls from
The efficiency of communication networks will be improved.

〔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 a subscriber 111 is detected by a call detection unit 121, processed by a call control unit 131 and a call processing unit 132, and is processed by a subscriber 111, as in FIG. As in FIG. 3, the regulation of calls from the person 111 is carried out by a number of outgoing accepted calls counting unit 141, an allowable number of accepted calls determining unit 142, an acceptable number of accepted calls holding unit 143, a number of outgoing accepted calls correcting unit 144, This is executed by the call restriction instruction unit 145, the call restriction unit 146, and the initialization unit 147.

On the other hand, when a call arrives from another exchange 211 connected to the trunk line 212, the incoming call detection unit 2
21 detects an incoming call, and sends an incoming call signal IC to the incoming call control unit 231.
, and notifies the other exchange 211 of the incoming call.

When the incoming call control unit 231 that has received the incoming call signal IC has not received the incoming call restriction flag F from the incoming call restriction instructing unit 245, it starts the incoming call processing unit 232, and the incoming call detection unit 2
The reception unit processes the incoming call detected by the reception unit 21 and transmits a subtraction signal to the reception reception call number counting unit 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. . 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 modification unit 244, as in FIG.
．． is extracted and added to the transferred number of permissible received calls Nl, and the total value (TIi+NI) is set in the received received call number counting unit 241.

Note that in the initial state, the incoming call count value T1. is set to zero, so the total value (T
The incoming call count value is 71. is the number of incoming accepted calls N1. is equal to

As in FIG. 3, the incoming accepted call number counting unit 241 subtracts one address from the incoming call count Tli every time the subtraction signal Di is transmitted from the incoming call control unit 231.

As in FIG. 3, the incoming call acceptance number counting unit 241 monitors the positive or negative of the incoming call count value TI, outputs the monitoring result as a positive/negative display signal pt, and outputs the monitoring result to the incoming call restriction instructing unit 24.
5 and the initialization unit 247.

As in FIG.
, indicates a negative state, transmits the incoming call restriction flag F, to the incoming call control unit 231, and when the positive/negative display signal P, indicates a positive state, transmits the incoming call restriction flag F, stop.

Similarly to FIG. 3, when the incoming call control unit 231 receives the incoming call signal IC while receiving the incoming call restriction flag Fi from the incoming call restriction instructing unit 245, the incoming call control unit 231 transmits the incoming call signal IC to another exchange 21.
The incoming call restriction unit 246 is activated in place of the incoming call processing unit 232 in accordance with the condition 1, 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 received call number correction unit 244 changes the current received call count value TI of the received call number counting unit 241 as described above! The total value (TIi
+N I; ) is set in the incoming call acceptance number counting section 241.

Note that, as in FIG. 3, the initialization unit 247 accepts the incoming call after confirming that the positive/negative display signal P is displaying a positive state every predetermined period (for example, 10 seconds). Initialize the call counting unit 241 and set the incoming call count value TI,
Set to 0.

In the above process, the incoming call count value 'rri is the incoming allowable accepted call number NI set by the incoming accepted call number modification unit 244.
4, or the incoming call count value TI at the end of the previous period!
represents the difference between the total value (TIi+Nl1) and the number of accepted calls Nai 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 receives the incoming call count value T1 from the incoming accepted call number counting unit 241 every predetermined period (1 second).
．． When the extracted incoming call count value TI falls below a predetermined value, the number of incoming calls from other exchanges 211 increases,
It is determined that the situation is approaching a state that requires regulation.

This state lasts for a predetermined number of periods (for example, 3 periods).
If the number of calls continues to be N, the allowable number of accepted calls correction unit 251 adjusts the number of outgoing allowable accepted calls N calculated by the number of allowable accepted calls determining unit 142.
1. A predetermined corrected number of calls α (for example, about 5% of the number of outgoing allowable accepted calls Nr) is subtracted from the incoming call count value N■, which is calculated by the allowable accepted call number determination unit 242. Add the corrected number of calls α to .

Thereafter, calls from the subscriber 111 will be handled by the number of permissible outgoing calls N1. The necessity of regulation is determined based on .degree., and the necessity of regulation is determined for incoming calls from other exchanges 211 based on the number of incoming permissible accepted calls Nl, which is increased by the corrected number of calls α.

As is clear from the above explanation, according to the present embodiment, when the allowable number of accepted calls modification unit 251 determines based on the incoming call count value TI that the incoming calls from other exchanges 211 are approaching a state where restrictions are required. , the number of incoming allowable accepted calls Nl is increased by the modified number of calls α, and incoming calls from other exchanges 211 are accepted preferentially.

The number of calls that can be simultaneously made and accepted is N1. By reducing the number of modified calls α, an increase in the usage rate of the part responsible for 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, when the number of incoming calls from other exchanges approaches a state that requires regulation, in the exchange IA, a part of the number of outgoing allowable accepted calls is allocated to the number of incoming allowable accepted calls. As a result, incoming calls from other exchanges are accepted with priority over calls originating from subscribers, thereby 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, ■ is an exchange, 2 is a means for modifying the number of allowable accepted calls,
111 is a subscriber, 112 is a subscriber line, 121 is a call detection unit, 131 is a call control unit, 132 is a call processing unit, 141
142 and 242 are allowable accepted call number determining units; 143 and 243 are allowable accepted call number holding units; 144 is an outgoing accepted call number correction unit; 145 is a call restriction instruction unit; Call regulation section, 147 and 247 are initialization sections, 211 is another exchange, 212 is a trunk line, 221 is an incoming call detection section, 231 is an incoming call control section, 232 is an incoming call processing section, 2
Reference numeral 41 denotes an incoming call acceptance counting unit, 244 an incoming call acceptance number modification unit, 245 an incoming call restriction instruction unit, and 246 an incoming call restriction unit. Agent: Patent Attorney Sada Igata - 1-way fee: $3 (Figure)

Claims (1)

[Claims] The number of permissible outgoing calls (N_o) that are allowed to be made within a predetermined period from the accommodated subscriber (111) and the number of calls accepted within a predetermined period from other exchanges (211) connected by a trunk line (212). The permissible number of incoming accepted calls (N_i) is determined, and the number of outgoing accepted calls (N_a_o) made and accepted from the subscriber (111) within a predetermined period is determined as the number of accepted outgoing calls (N_o). ), calls from the subscriber (111) are restricted, and the number of accepted calls received and accepted from the other exchange (211) within a predetermined period (N_a_i
) exceeds the permissible number of incoming calls (N_i), in the exchange (1) that restricts incoming calls from the other exchange (211), the permissible number of incoming calls (N_i) and the number of incoming accepted calls number(
N_a_i), and determine the permissible number of incoming calls (N_i
) and the number of incoming accepted calls (N_a_i) is less than a predetermined value, the number of outgoing allowable accepted calls (N
__o) by a predetermined modified number of calls (α),
The number of incoming allowable accepted calls (N_i) is the modified number of calls (α)
A call regulation priority control system characterized by providing a means (2) for modifying the number of permissible accepted calls.