JP2001320483A - Call connection method according to the priority level of exchanges and subscribers - Google Patents

Abstract

(57) [Summary] [Problem] To provide a call connection method according to a priority level of an exchange and a subscriber, the past history of line use of each subscriber is reflected in the priority level, and the priority level is used in a congestion regulation process. And provides a priority connection service according to the line use situation of each subscriber. SOLUTION: A connection time of a call originated from each subscriber terminal is added for each subscriber terminal at regular intervals, and the total connection time T is stored and held. The total connection time T is compared with a preset reference time T1, T2, T3, T4 (1-1,
1-3, 1-5, 1-9), and based on the comparison result, a priority level corresponding to the total connection time T is calculated and set for each subscriber at regular intervals (1-2, 1-4). , 1-6,1-
8, 1-10). For an outgoing call, a priority level set for a certain period immediately before the call is set in the call connection request message, and when traffic is congested, connection is restricted according to the priority level set in the call connection request message.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a call connection method according to the priority level of an exchange and a subscriber. The exchange is
When a large number of calls occur, prevent the degradation of switching performance and functions due to congestion, and ensure that important calls such as emergency / emergency calls can be connected without hindrance and improve the reliability of communication / call services. Is secured.

[0002] In order to ensure the reliability of the communication / call service as described above, connection restriction conditions during congestion are determined in advance, and when a call exceeds the reference value of the connection restriction conditions, a new call is generated. In this case, the connection of a general call that occurs in the switchboard is restricted, a new call is prevented from entering the congested exchange, and a process of preventing the exchange from going out of control is performed.

[0003] The reference values of the above connection restriction conditions are set stepwise according to the degree of congestion, and stepwise connection restriction is performed according to each reference value. In addition, a service class is set for each calling subscriber, and a priority level of the call connection is set in the service class.

When a call is generated during execution of the connection restriction, the priority level is identified from the originating subscriber class of each generated call, and the above-described stepwise connection restriction is performed according to the priority level. Connection control is performed so that the call of the calling subscriber having a higher priority level is connected preferentially.

[0005]

2. Description of the Related Art At present, however, a connection restriction level (priority level) at the time of congestion is fixedly set for each subscriber by a communication carrier operating an exchange, and is based on station data in which the connection restriction level is set. In addition, the connection was fixedly restricted by the exchange.

[0006] Therefore, a general subscriber is restricted in connection according to a fixed priority level set by a telecommunications carrier without notifying his / her own priority level, and the general subscriber fluctuates the priority level. Was impossible.

[0007] There is a service for discounting the next month's charge according to the previous month's call charge for each subscriber. However, depending on the past line usage history of general subscribers, etc. There is no switch or call connection method to be reflected in the priority level of each subscriber, and the priority level of each subscriber has not been variably set according to the line use situation of each subscriber.

[0008]

In recent years where the importance and convenience of networks have been increasing and traffic has been increasing, the possibility of frequent activation of call connection regulation due to congestion of exchanges has increased. On the other hand, general subscribers have potentially increased demands and desires for services to which calls are more reliably connected.

[0009] However, as described above, there has conventionally been no incentive for general subscribers to dynamically change their own priority levels during congestion according to priority levels. Due to severe connection restrictions, subscribers' line usage status, such as past line usage history, was not reflected in the priority level at all.

[0010] In general, even among subscribers of the same service class, it is appropriate to regard a subscriber who has a lot of actual use of a line as a subscriber who needs more communication / communication services. Therefore, connecting those subscribers preferentially leads to an improvement in serviceability.

Therefore, the present invention reflects the past line use history of each subscriber in the priority level referred to when restricting the connection during congestion, so that the subscriber who needs more communication / communication service is more likely. It is an object of the present invention to provide an exchange and a call connection method capable of providing a communication / communication service according to the line use situation of each subscriber so that connection is ensured.

[0012]

In order to solve the above-mentioned problems, an exchange according to the present invention comprises: (1) an exchange for restricting connection according to a priority level of an originating subscriber at the time of traffic congestion; Storage means for adding a connection time of an outgoing call for each subscriber terminal for each fixed period, and storing a total connection time for each subscriber terminal within the certain period; and a total storage time stored in the storage means. Priority level setting means for comparing the connection time with a preset reference time, and calculating and setting a priority level corresponding to the total connection time for the certain period for each subscriber for each certain period according to the comparison result. Means for setting the priority level set by the priority level setting means in a call connection request message of the generated call for a certain period immediately before the generated call, when the traffic is congested. , According to the priority level set in the call connection request message is one that includes a call connection control means for connecting restriction against biological calling, the.

(2) In response to an outgoing call in which the originating call is an outgoing call to another exchange, the call connection request message in which the priority level is set is transmitted to the outgoing destination exchange. Means for receiving an incoming call whose incoming call is an incoming call from another switch during traffic congestion, to the priority level set in the call connection request message of the incoming call received from another switch. And call connection control means for restricting the connection in response to the call.

(3) A storage means for storing the total connection time for each subscriber terminal and a priority level setting means for calculating and setting the priority level for each subscriber via a communication line. In preparation for a connected external device, for the generated call, the external device is inquired about the priority level set by the priority level setting means, and the priority level notified from the external device as a result of the inquiry is generated by the originating call. It is provided with means for setting a call connection request message of a call.

Further, according to the call connection method of the present invention, in the (4) call connection method for restricting connection according to the priority level of a calling subscriber at the time of traffic congestion, the connection time of a call sent from each subscriber terminal is reduced. The total connection time is added for each subscriber terminal for each fixed period, the total connection time for each subscriber terminal within the certain period is stored, and the stored total connection time is compared with a preset reference time. According to the result, a priority level corresponding to the total connection time of the certain period is calculated and set for each subscriber for each of the certain periods, and for the generated call, the priority level is set to a certain period immediately before the generated call. Setting the priority level in the call connection request message of the originating call, and performing traffic regulation on the originating call according to the priority level set in the call connection request message during traffic congestion. What to do A.

(5) In response to an outgoing call in which the originating call is an outgoing call to another exchange, the call connection request message in which the priority level is set is transmitted to the outgoing call destination exchange. At the time of traffic congestion, for an incoming call in which the originating call is an incoming call from another switch, according to the priority level set in a call connection request message of the incoming call received from another switch, The connection is regulated.

(6) In an external device connected via a communication line, the total connection time for each subscriber terminal is stored, and the priority level is calculated and set for each subscriber, and Inquires the external device about the priority level set by the priority level setting means for the generated call, and sets the priority level notified from the external device as a result of the inquiry in the call connection request message of the generated call. To set.

[0018]

FIG. 1 shows a processing flow for setting a priority level according to the present invention. In the embodiment shown in FIG. 1, the reference values T1 to T4 of the total talk time during a certain period are set.
(T1 <T2 <T3 <T4) is determined in advance, the total talk time of the calling subscriber in a certain period is compared with the reference values T1 to T4, and the priority level is determined according to the magnitude.

That is, it is determined whether or not the total talk time T of the subscriber A within the target period is equal to or less than the reference value T1 (step 1-1). Sets the priority level of the subscriber A to priority 1 (step 1-2).

It is determined whether or not the total talk time T of the subscriber A within the target period exceeds the reference value T1 and is equal to or less than the reference value T2 (step 1-3). The priority level of the subscriber A is set to the priority 2 during the period (step 1-4).

Also, it is determined whether or not the total talk time T of the subscriber A within the target period exceeds the reference value T2 and is equal to or less than the reference value T3 (step 1-5). The priority level of the subscriber A is set to the priority 3 during the period (step 1-6).

Further, it is determined whether or not the total talk time T of the subscriber A within the target period exceeds the reference value T3 and is equal to or less than the reference value T4 (step 1-7). The priority level of the subscriber A is set to the priority level 4 during the period (step 1-8).

Further, it is determined whether or not the total talk time T of the subscriber A within the target period exceeds the reference value T4 (step 1-9).
Is set to the priority level 5 (step 1-1).
0). Then, after setting the priority level, the total talk time T of the subscriber A is initialized, and the process of calculating the total talk time T by totaling the talk time of the next target period is started (step 1-1).
1).

FIG. 2 shows a processing flow for calculating the total talk time in the present invention. As shown in the figure, when a subscriber A makes a call during a certain target period (step 2-1), the priority level of the subscriber A set by the processing flow of FIG. (Step 2-2), and the exchange performs restriction or connection based on the priority level.

When the outgoing call of the subscriber A is connected, the subscriber A starts a call, thereafter ends the call, and when the call ends (step 2-3), the total call time T of the current section of the subscriber A becomes The current talk time is added to update the total talk time T (step 2-4).

When the last day of the certain period is reached, the aforementioned FIG.
According to the processing flow shown in (1), the total talk time T of each subscriber during the period is compared with reference values T1 to T4 previously set by the service provider by operating the exchange, and the priority level of each subscriber is Is calculated, and the priority of each subscriber is held in the exchange.

After maintaining the priority for each subscriber, the total talk time T for each subscriber is initialized, and similarly, the calculation of the total talk time in the next period is started. In this way, the call duration is added and held for each calling subscriber for a certain period, and the priority level for each subscriber is calculated with reference to a reference value set in advance on the last day of the period. Here, "call time"
Is synonymous with “connection time” of a call or “usage amount” of a line, and “total talk time” is synonymous with “total connection time” or “total usage amount”.

Then, when a call is generated in the next period, the priority is set on the call connection request message with reference to the priority level calculated in the previous period, and the exchange sets a regulation corresponding to the priority level. From the rate, the same connection regulation as in the past is performed, and call connection control is performed according to the priority level at the time of congestion.

FIG. 3 shows a setting example of the priority level set according to the total usage amount for each period. As shown in FIG. The total talk time (use amount) is reflected in the priority level in the next fixed period Y, and the total talk time (use amount) in the fixed period Y is reflected in the priority level in the next fixed period Z.

In the illustrated example, the total talk time T (T = t ₁ + t ₂ + t ₃ ) of the subscriber A during the fixed period X is equal to the reference value T.
In the next certain period Y, the priority 5 (the highest level) according to the total talk time T is set. Since the total talk time T (T = t ₄ ) in the certain period Y is equal to or less than the reference value T1, the priority 1 (the lowest level) according to the total talk time T is set in the next certain period Z. . In the figure, t ₁ , t ₂ , t ₃ , t ₄ , t ₅ , t _6, ... Are the call times (connection times) of the subscriber A each time.

FIG. 4 shows an example of the operation of the exchange which performs call connection control with reference to the priority level set in the own exchange. In FIG. 7A, the exchange 4-1 calculates the priority level of each subscriber 4-2 from the total talk time (line use status) of each subscriber 4-2, and sets the priority level. Here, it is assumed that the highest priority is set for the subscriber terminal A.

Here, as shown in FIG. 2B, when a call is made from the subscriber terminal 4-2, the exchange 4-1 gives priority to the subscriber terminal 4-2 set in its own device. Refers to degrees. The priority is used when determining the restriction rate when the exchange 4-1 is congested, and the restriction rate is set in advance in accordance with the priority. The exchange 4-1 executes a connection process or a disconnection process for a call from the subscriber A according to the determined restriction rate.

When the local exchange 4-1 is congested, a restriction rate according to the congestion stage is determined based on the priority of the originating subscriber A, and a restriction or a general call processing sequence is performed in accordance with the restriction rate. Execute the connection process. As a result, when the connection process is executed, as shown in FIG. 4C, for example, ISUP (ISDN user part) in the inter-station signaling system
The priority of the subscriber A is set in a connection request message such as an IAM (Initial address message), and call connection processing is executed.

When the originating exchange 4-1 is not in a congested state, the exchange 4-1 executes a general call processing sequence without restricting the connection. A call connection request message is set, and the priority is transmitted to another station in the call connection request message.

FIG. 5 shows a sequence for performing call connection control with reference to the priority level set in the local exchange. Subscriber A
When there is an outgoing call (step 5-1), if the exchange of the originating station is in a congested state, the switching process is performed from the preset priority of the subscriber A (step 5-2), and the switching is performed. If the connection is to be made without a connection, the priority registered in the exchange according to the use situation of the subscriber A is set in the connection request message in the call processing (step 5-3), and the connection request message is set in another exchange ( Outgoing connection) or to the subscriber (internal station connection) (step 5-4).

FIG. 6 shows an operation example of an exchange for performing call connection control with reference to a priority level notified from another station. In (a) of the figure, the exchange 6-1 receives a connection request message such as ISUP of ISUP in the interoffice signaling system from the exchange of another station, and gives priority to the calling subscriber set in the connection request message. Refers to degrees. Now, it is assumed that a flag indicating the priority of “highest priority” has been set in the connection request message.

Next, as shown in FIG.
-1 determines the restriction rate for the calling subscriber based on the priority in the connection request message at the time of congestion, and executes connection processing or disconnection processing according to the restriction rate according to a general call processing sequence. When the connection process is executed, (c) of FIG.
As shown in (1), the exchange 6-1 connects an incoming call to the incoming terminal B.

FIG. 7 shows an example of the operation of the exchange which performs call connection control by inquiring about the priority level to an external device. In (a) of the figure, the exchange 7-1 transmits the total talk time for each subscriber to the external device 7-2 on the last day of the fixed period, and the external device 7-
2 calculates and sets the priority of each subscriber from the comparison between the transmitted total call time and the reference value. As the external device 7-2, an existing device such as a call charge accounting device can be used.

When a call is made from the subscriber terminal A as shown in FIG. 5B, the exchange 7-1 calls the external device 7-2 as shown in FIG. Inquire about and obtain the priority of subscriber A. The exchange 7-1 determines the restriction rate for the calling subscriber A in accordance with the priority at the time of congestion, performs call connection control according to the restriction rate, and executes restriction or priority connection. If the calling subscriber A has a higher priority and connects preferentially,
As shown in (d) of the figure, a flag indicating the priority is set in a call connection request message such as IAM, and the connection sequence is continued.

FIG. 8 shows a sequence for performing a call connection control by inquiring of an external device about a priority level. When there is a call from the subscriber A (step 8-1), the exchange of the originating station inquires the external device about the priority of the subscriber A (step 8-).
2), the external device notifies the exchange of the priority of the subscriber A to the inquiry (step 8-3).

When the exchange is in a congestion state, the exchange performs a restriction process on the subscriber A in accordance with the notified priority (step 8-4), and when a priority connection is established, sets the priority as a priority in the call processing. (Step 8-5), and sends the connection request message with the priority set to another exchange (for outgoing connection) or a subscriber (for in-house connection) (Step 8-6).

[0042]

As described above, according to the present invention,
By dynamically setting the priority level of each subscriber according to the total connection time for each fixed period of each subscriber, and performing a restriction process according to the priority level at the time of congestion, a subscriber having a long total connection time Has a high probability of being connected, and a subscriber who has a short total connection time has a high probability of being refused connection by the restriction process.

As a result, subscribers who use more communication / call services are preferentially connected,
A dynamic priority connection service according to the communication / call service usage status of each subscriber is enabled. As a result, it is possible to provide a communication service corresponding to the usage status of general subscribers, and to improve serviceability.

In response to an outgoing / incoming call, the originating exchange transmits a call connection request message with a priority level set to the destination station, and the destination exchange refers to the priority level set in the call connection request message. Executing a restricted connection during congestion enables consistent priority connection processing according to the priority level of each originating subscriber on the network from the originating exchange to the destination exchange, Thus, it is possible to provide a priority connection service with a uniform priority level on a network.

Further, the process of adding the call time for determining the priority level and the process of calculating the priority are executed by an external device connected via a communication line, and the priority level is inquired to the external device to obtain the information. It is possible to reduce the memory load on the exchange body and the processing load required for calculating the priority level, and it is possible to use an existing device such as a billing device as an external device, and to construct a system at low cost. it can.

[0046]

[Brief description of the drawings]

FIG. 1 is a processing flowchart for setting a priority level according to the present invention.

FIG. 2 is a processing flowchart for calculating a total call time according to the present invention.

FIG. 3 is a diagram illustrating an example of setting a priority level according to a total usage amount for each period.

FIG. 4 is a diagram illustrating an operation example of an exchange that performs call connection control based on a priority level set in a local exchange;

FIG. 5 is a diagram showing a sequence of call connection control based on a priority level set in the local exchange;

FIG. 6 is a diagram illustrating an operation example of an exchange that performs call connection control based on a priority level notified from another station.

FIG. 7 is a diagram illustrating an operation example of an exchange that performs call connection control by inquiring of a priority level to an external device;

FIG. 8 is a diagram showing a sequence for performing a call connection control by inquiring of a priority level to an external device.

[Explanation of symbols]

1-1 to 1-11 Steps in the processing flow for setting the priority level T Total talk time of the subscriber T1, T2, T3, T4 Reference value (T1 <T2 <T3 <
T4)

Claims (6)

[Claims] 1. An exchange for restricting connection according to a priority level of an originating subscriber at the time of traffic congestion, wherein a connection time of a call originated from each subscriber terminal is added for each subscriber terminal at regular intervals, Storage means for storing the total connection time for each subscriber terminal within the fixed time period; comparing the total connection time stored in the storage means with a preset reference time; Priority level setting means for calculating and setting a priority level corresponding to the total connection time for each subscriber for each fixed period, and setting the priority level for a generated call for a predetermined period immediately before the generated call. Means for setting the priority level set by the means in the call connection request message of the originated call; and, in a case of traffic congestion, according to the priority level set in the call connection request message. Exchange, characterized in that it and a call connection control means for connecting regulation for the call. 2. A means for sending out the call connection request message, in which the priority level is set, to an outgoing call destination exchange in response to an outgoing call in which the outgoing call is an outgoing call to another exchange, At the time of traffic congestion, in response to an incoming call in which the generated call is an incoming call from another switch, connection is performed according to the priority level set in a call connection request message of the incoming call received from another switch. The exchange according to claim 1, further comprising: call connection control means for performing restriction. 3. A storage means for storing the total connection time for each subscriber terminal, and a priority level setting means for calculating and setting the priority level for each subscriber are connected via a communication line. In the external device, for the generated call, the external device is queried about the priority level set by the priority level setting means, and the priority level notified from the external device as a result of the inquiry is the call of the generated call. 3. The exchange according to claim 1, further comprising means for setting a connection request message. 4. A call connection method for restricting connection in accordance with the priority level of a calling subscriber during traffic congestion, wherein the connection time of a call sent from each subscriber terminal is added for each subscriber terminal at regular intervals. And storing the total connection time of each subscriber terminal within the predetermined period, comparing the stored total connection time with a preset reference time, and comparing the total connection time with the total connection time of the predetermined period according to the comparison result. A priority level corresponding to each subscriber is calculated and set for each fixed period, and for a generated call, the priority level set for a predetermined period immediately before the generated call is set to the call connection of the generated call. A call connection according to the priority level of the subscriber, wherein the connection setting is performed in accordance with the priority level set in the call connection request message during traffic congestion. One . 5. An outgoing call in which the originating call is an outgoing call to another exchange, sending the call connection request message with the priority level set to the outgoing destination exchange, and At the time, for an incoming call in which the originating call is an incoming call from another exchange, connection restriction is performed according to the priority level set in a call connection request message of the incoming call received from the other exchange. The call connection method according to claim 4, wherein the call connection is performed. 6. An external device connected via a communication line stores a total connection time for each of said subscriber terminals, calculates and sets said priority level corresponding to each subscriber, and generates an exchange. For the call, query the external device for the priority level set by the priority level setting means,
6. The call connection method according to claim 4, wherein a priority level notified from the external device as the inquiry result is set in a call connection request message of the generated call.