JPH08102788A - Restricting system for use of primary group interface - Google Patents

Abstract

PURPOSE: To prevent all channels from being occupied by the other kind of calls at the time of using the primary group of ISDN by the plural kinds of the calls. CONSTITUTION: A control value inputted by a control value input means 8 is stored in a storage means inside an exchange 1 and a channel restriction means sets usable channels for respective call kinds for a primary group interface 2 or 3 corresponding to the stored value. When the call is generated, a communication means 9 performs normal connection until a restricted channel number, however, rejects the connection thereafter when the specified call reaches a specified call amount.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a primary group interface use restriction system for restricting call volume for each call type.

[0002]

2. Description of the Related Art A plurality of channels, for example, up to 23 channels can be used in a primary group interface of ISDN, and how to use these channels is left to the will of the subscriber.

[0003]

This primary group interface has different call types, such as voice communication, data communication,
When used in packet communication, etc., if the call volume of a certain call type is abnormally large, most of the channels will be occupied by that call, and there will be no available channels even when trying to communicate with another call type. Therefore, there is a problem that a new call setup cannot be performed with another call type.

The present invention has been made in view of the above circumstances, and is intended to prevent call setup from being hindered by the call volume of other call types.

[0005]

In order to solve such a problem, the invention of claim 1 sets a maximum value allowed for each call type in the primary interface, and a regulation value inputting means. The storage means stores the regulated value, and the connection request is rejected when a connection request exceeds the number of calls stored in the storage means in a predetermined call. According to the invention of claim 2, in claim 1, the priority is given within the same call type, and even if there is an empty channel in the same call type, when the empty channel becomes less than a predetermined number, the number of remaining channels According to the above, the connection is rejected from the call with the lower priority.

[0006]

According to the invention of claim 1, when the call volume of a specific call exceeds the set upper limit value, the connection request generated thereafter is rejected. According to the second aspect of the present invention, when the number of available channels becomes less than the predetermined amount, the call with the lower priority is rejected first.

[0007]

1 is a diagram showing an embodiment of the present invention, in which an exchange 1 accommodates primary group interface subscribers (hereinafter referred to as primary group subscribers) 4 and 5 in primary group interfaces 2 and 3, respectively. are doing. Further, the exchange 1 inputs the primary group interface channel usage limit regulation value input device (hereinafter referred to as regulation value input means) 8 for inputting the regulation value of the channel usage limitation to each primary group interface.
The switch operator can input the regulation value for each primary group interface and for each call type.

The input regulation value is processed and stored by the primary group interface usage limit regulation value input storage means (hereinafter referred to as storage means) 7 of the exchange 1. afterwards,
When the exchange 1 accepts a new connection request to each primary group subscriber, the communication processing means (hereinafter referred to as communication means) 9 in the exchange 1 uses the primary group interface channel use limiting means (hereinafter referred to as channel limiting means). It is checked whether the channel can be used or not based on the regulation value stored in the storage means 7 for 6), and if the channel cannot be used, the newly accepted connection request is rejected.

That is, for example, when the channel use limit value is set for the interface 2 for each call type of voice, data and packet as shown in FIG.
As shown in FIG. 11, it is assumed that the 11th to 14th channels have already been communicated by voice, and the 16th to 22nd channels have already been communicated by data call. At this time, when a voice call is further generated in the primary interface 2, the voice call becomes communicable because the 15th channel is idle.

However, when a data call occurs, all channels up to the 16th channel that can be used as a data call are in use. Therefore, even if an empty channel exists in the channels in the primary group interface 2. Since the channel is prohibited from being used as a data call, the data call that occurred is rejected from the connection. In the case of a packet call, the 23rd channel, which is set as the channel of the packet call, is vacant, and thus communication becomes possible.

FIGS. 4 and 5 show another example, in which the primary group subscriber 5 is restricted in channel usage. As shown in FIG. 4, when the channel usage limit value is set for the primary group subscriber 5,
As shown in, it is assumed that the first to tenth channels have already been communicated by voice, and the eleventh to twentieth channels have already been communicated by data call.

At this time, if a voice call is made in the interface 3, the maximum number of voice calls connected is set to 20. Therefore, the number of voice calls connected at this time is still 10 calls. Therefore, this voice call can be communicated using the idle channel. However, when a data call occurs, the maximum number of connected data calls is set to 10. Therefore, since the number of connected data calls is already 10 at this time, the interface 3
An empty channel exists in the inside channel, but the data call is rejected.

In the case of a packet call, since the regulation value is not set, it is possible to use the idle channel for communication.

In the above embodiment, when the number of calls is within the regulation value,
If there is a connection request, the connection is made unconditionally. Therefore, when important communication occurs, even if there is a free channel in another type, it cannot be connected unless there is a free channel in the same type of channel. In order to eliminate such adverse effects,
The following two methods are possible.

One of them is to give a priority to each call, and when the number of empty channels of the same type becomes less than a predetermined amount, if there is a connection request from the one of lower priority, the empty channel is assigned to that type. Even if there is, try to refuse the connection. When the number of available channels becomes smaller, connections with higher priority will be rejected in the order of lower priority, and when only one channel remains, connections will be rejected except for calls with the highest priority. To

The other one is, for example, even if there is no free channel for a call of the type data, if there is an empty channel in the call of the type telephone, the call having the highest priority among the calls of the data type. The only one is that if there is an empty channel in the call of the type telephone, it is connected to that channel.

If the probability of rejecting the connection for such a high priority one is set low, the probability of rejecting the connection of important communication is lowered even if the channel is regulated.

[0018]

As described above, the invention of claim 1 is
The maximum allowable value is set for each type of call in the primary interface, and when there are connection requests that exceed the number of calls stored in a given call, the connection requests are rejected. Has the effect of not affecting the connection of other call types. According to the invention of claim 2, in the invention of claim 1, priority is given to the same call type, and even if there are empty channels in the same call type, when the number of empty channels becomes less than a predetermined number, the remaining Since the connection is rejected from the call with the lower priority according to the number of channels, the connection with the higher priority has the effect of lowering the probability of rejecting the connection.

[Brief description of drawings]

FIG. 1 is a diagram showing an embodiment of the present invention.

FIG. 2 is a diagram illustrating one example of channel restrictions for each call type.

FIG. 3 is a diagram showing an example of a connection state when the channel restriction shown in FIG. 2 is performed.

FIG. 4 is a diagram illustrating another example of the channel restriction example for each call type.

5 is a diagram showing an example of a connection state when the channel restriction shown in FIG. 4 is performed.

[Explanation of symbols]

1 ... Exchanger, 2, 3 ... Primary group interface, 4, 5
... primary group subscriber, 6 ... channel limiting means, 7 ... storage means, 8 ... regulation value input means, 9 communication means.

Claims (2)

[Claims] 1. A primary group interface communication method for performing communication of a plurality of call types by using a channel in a primary group interface connected to an exchange, which is permitted for each type of call in the primary group interface. Restriction value input means for setting the maximum value, storage means for storing the input restriction value, and rejection of a connection request when a connection request exceeds the number of calls stored in the storage means in a predetermined call A method of limiting the use of the primary interface, which is characterized by: 2. The method according to claim 1, wherein priority is given to the same call type, and even if there is a vacant channel in the same call type, when the vacant channel becomes less than a predetermined number, the remaining channel number is set. A primary interface use restriction method characterized by rejecting a connection from a call having a lower priority accordingly.