JP2002044696A - Node device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely reduce the size of a dynamic storage area regarding a node device for conducting call processing in a connection-oriented communication network. SOLUTION: The node device comprises a net interface means for taking an interface with the communication network, a static storage means for storing information of an operation and a management of resources to be supplied to an interface, and a call processing means for conducting the call processing of a call generated in its own station, capturing an empty memory area as a dynamic storage area to store information regarding the call and suitably referring to the storage area of the static storage means together with the dynamic storage area. In this device, the call processing means is constituted by releasing the captured dynamic storage area when the call becomes a complete call.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a node device for performing call processing of a call that has occurred in a connection-type communication network.

[0002]

2. Description of the Related Art In recent years, various microprocessors that are inexpensive, have high performance, and have low power consumption have become widespread, and such microprocessors have a node in which load and function are distributed in a predetermined form. It is often installed in devices and other communication equipment. The following information is stored in the main memory of an exchange connected to a connection-type communication network among such node devices.

[0003] The subscriber line, the trunk, the line (route or corresponding switch port) connected to the own station and other resources which are accommodated individually correspond to each other, and as shown in FIG. A set of attributes given as information. A set of information related to a call which has occurred or arrived at the own station and which is appropriately generated or deleted in the course of call processing as shown in FIG. Are divided into a “static storage area” in which the above-described set of attributes is stored in advance and a “dynamic storage area” in which the above-described set of information is to be stored, and call processing is performed. In the process of, it is appropriately referred to under predetermined area management.

[0004] The following items correspond to the above-mentioned attributes related to the subscriber line. -"Containment position" indicating the frame, shelf, slot, etc., in which the corresponding line circuit is physically accommodated-"Installation / non-installation", "Operating status" indicating whether the operating status is correct, etc.-Set for the applicable subscriber "Service order" (including subscriber class) assigned-Telephone number assigned The attributes related to the above-mentioned trunk or line (route or port) include, for example, the following items.

[0007] "Housing positions" indicating physically accommodated frames, shelves, slots, etc.-[Operating status] indicating mounting / non-mounting, correctness of operating status, etc.-Method performed based on the result of number analysis Trunk group number assigned to the unit of route selection • Identifier • Applied signaling system By the way, in the process of call processing, “static storage area”
Since the above-described storage areas individually allocated to the respective resources are generally resident in the main storage, they are uniquely specified (addressed) in accordance with the resources determined as computation targets in the course of the call processing. .

On the other hand, a free storage area in the main memory is:
Each time a new call occurs, it is appropriately allocated as a “dynamic storage area” corresponding to the call under the area management performed by the operating system. In addition, the "dynamic storage area" that was allocated to the call that disappeared
Is deleted as appropriate. Regarding the above-described call processing, any of the calculation target, the calculation procedure, and the calculation result are
Since the present invention is not a feature of the present invention and can be realized by applying various known techniques, a detailed description thereof will be omitted below.

[0007] Further, while the above-mentioned completed call remains, the “dynamic storage area” allocated to the completed call is:
The result is maintained as an operation result of the call processing performed when the completed call disappears. Therefore, in such a switch,
The “dynamic storage area” is individually allocated to calls (including completed calls) existing in parallel, and is deleted when the call disappears, so that the number of subscriber lines and lines accommodated therein. , The storage area of the main memory is used efficiently and call processing is performed smoothly.

[0008]

By the way, in the above-described conventional example, the "dynamic storage area" allocated to each completed call is captured during the hold time of the completed call and is stored in another call. There is no assignment. Therefore, when the average hold time of the actually generated completed call is long, the turnover rate at which the vacant storage area of the main memory is allocated to the newly generated call is reduced, and unnecessary call loss occurs. There was a possibility.

Conventionally, such a change or increase in the average hold time can be dealt with by increasing the storage capacity of a main memory of a processor that performs call processing (hereinafter, referred to as a "call processor"). Was. However, the average holding time described above has recently increased from the standard value of 2-3 minutes with the increase in the number of subscribers who have access to the Internet via the circuit switching network. It is increasing to a significantly larger value of 30 minutes or more.

The maximum size of the memory that can be mounted as main memory in the call processor is restricted by the maximum value of the number of memories that can be physically mounted in the existing switching system, and a new call processor is required. However, there are many cases where restrictions are imposed by the bus width and the addressing method specific to the processor to be mounted, even when the device is manufactured.

Further, even if a call processor having a main memory having a size large enough to accommodate a desired average hold time is realized within the above-mentioned restrictions, such a call processor is mounted. The switch was difficult to implement, hampered by cost limits and mounting, thermal design, and other constraints. However, the increase in the average holding time described above is further accelerating, and it is a factor that causes a call blocking rate to increase especially during the peak hours, so that an appropriate and prompt response has been strongly demanded.

According to the present invention, a change in hardware configuration is provided.
An object of the present invention is to provide a node device that can surely reduce the size of a required dynamic storage area without lowering service quality and responsiveness.

[0013]

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

In the first aspect of the present invention, the network interface means 11 interfaces with a connection-type communication network. The static storage unit 12 stores information related to the operation and management of the resources provided for the above-described interface. The call processing means 14 performs call processing for a call generated in the own station, and captures an empty storage area among the storage areas of the main memory 13 as a dynamic storage area in which information relating to this call is to be stored. At the same time, the storage area of the static storage unit 12 is appropriately referred to in conjunction with the dynamic storage area.

Further, the call processing means 14 releases the captured dynamic storage area when the call originating at the own station becomes a completed call. That is, the dynamic storage area captured in the process of the originating call becoming a completed call does not continue to be captured for the duration of the completed call, which can be significantly longer.
To be released.

Therefore, even when the average hold time of a completed call is a large value, the dynamic storage area of the storage area of the main memory 13 is efficiently shared for call processing of a plurality of calls. The probability that a congestion state or a call loss occurs due to such a shortage of the dynamic storage area decreases. In the second aspect of the present invention, the network interface means 11 interfaces with a connection-type communication network. Static storage means 1
2 stores information related to the operation and management of the resources provided to the above-described interface. Call processing means 1
4 performs call processing for a call that has occurred in its own station;
Of the storage areas of the third storage area, a free storage area is captured as a dynamic storage area in which information related to this call is to be stored, and the storage area of the static storage means 12 is appropriately set in accordance with the dynamic storage area. refer.

The call processing means 14 saves the information relating to the completed call from the information stored in the dynamic storage area to the external storage 15 when the call generated in the local station is a completed call. . Further, the call processing means 14 releases the dynamic storage area in which the information is stored, and restores the information saved in the external storage 15 in the process of erasing the completed call.

In other words, the dynamic storage area captured in the process of the generated call becoming a completed call is released without being captured over the hold time of the completed call, which can be significantly longer. Further, the information stored in the dynamic storage area released in this way is maintained in the external storage 15 provided separately from the storage area of the main storage 13, and the corresponding completed call disappears. In the process, it is appropriately provided for call processing.

Therefore, in the course of the call processing for all the completed calls that have occurred, even if the average hold time of these completed calls has a large value, the loss of the information to be referred to can be avoided, and the billing can be prevented. As in the invention described in the item 1, the probability that a congestion state or a call loss occurs due to the shortage of the dynamic storage area decreases. In the invention according to claim 3,
The network interface means 11 interfaces with a connection-type communication network. The static storage unit 12 stores information related to the operation and management of the resources provided for the above-described interface. The call processing means 14 performs call processing of a call generated in the local station, and captures an empty storage area among the storage areas of the main memory 13 as a dynamic storage area in which information related to the call is to be stored. At the same time, the storage area of the static storage means 12 is appropriately referred to in conjunction with the dynamic storage area.

When the call originating from the own station becomes a completed call, the call processing means 14 statically corresponds to one of the resource in which the completed call has occurred and the resource allocated to the completed call. The information relating to the completed call is saved in the storage area of the storage means 12. Further, the call processing means 14 releases the dynamic storage area in which these pieces of information are stored, and restores the information saved in the storage area of the static storage means 12 in the process of erasing the completed call. .

That is, the dynamic storage area captured in the process of the completed call becoming a completed call is released without being captured over a hold time that can be significantly longer. Further, the information stored in the dynamic storage area released in this manner is stored in the storage area of the static storage unit 12 when a corresponding completed call is generated or in a resource allocated to the completed call. It is stored in the relevant storage area and is appropriately subjected to call processing in a process in which the corresponding completed call disappears.

Therefore, in the process of processing all of the completed calls that have occurred, even if the average hold time of these completed calls has a large value, the loss of information to be referred to is avoided, and the billing is prevented. As in the invention described in the item 1, the probability that a congestion state or a call loss occurs due to the shortage of the dynamic storage area decreases. According to the second aspect of the present invention, the call processing means 14 includes the static storage means 12.
The information that can be restored based on the information stored in the external storage 15 and / or the main storage 13 is excluded from evacuation targets in the external storage 15.

That is, for any completed call, the amount of information to be held in the dynamic storage area is reduced,
In addition, the amount of information to be stored in parallel in the external storage 15 is suppressed to a small value even when a large number of completed calls having a long holding time continue in parallel. In the invention of the first sub-concept of the invention described in claims 2 and 3,
The call processing means 14 compresses information relating to the completed call and saves the information in the external storage 15.

That is, since the maximum amount of information to be stored in parallel in the external storage 15 is reduced, as long as the amount of processing of the call processing means 14 has a sufficient margin, along with the cost reduction, It is possible to speed up the disappearance of the completed call. According to the second sub-concept of the invention described in claims 2 and 3, the call processing means 14 restores the information generated based on the call processing procedure and stored in the dynamic storage area. To merge with the information.

That is, the call processing means 14 performs call processing for any completed call without imposing restrictions on generation of information to be stored in the dynamic storage area and storage of the information. be able to.

Therefore, the present invention can be applied without changing the basic configuration of software for realizing call processing. According to a first aspect related to the first to third aspects of the present invention, the network interface means 11
Interfaces with a connection-type communication network. The static storage unit 12 stores information related to the operation and management of the resources provided for the above-described interface. The call processing means 14 performs call processing of a call generated in the local station, and captures an empty storage area among the storage areas of the main memory 13 as a dynamic storage area in which information related to the call is to be stored. At the same time, the storage area of the static storage means 12 is appropriately referred to in conjunction with the dynamic storage area.

When a call originating at the own station becomes a completed call, the call processing means 14 stores information related to the completed call stored in the dynamic storage area as a basis for restoring this information. The information is saved in this dynamic storage area as the next information. Further, the call processing means 14 releases a surplus storage area of the dynamic storage area, and attempts to restore information based on the secondary information in the course of the disappearance of the completed call.

That is, for any completed call, the amount of information to be held in the dynamic storage area is reduced, so long as the processing amount required for restoring the above-mentioned information is secured, external storage and other The utilization efficiency of the dynamic storage area can be increased without any intervention. According to the second aspect of the present invention, the call processing means 14 captures the dynamic storage area storing the information on the completed call from the time when the completed call occurs. Until the elapse of the longest time allowed to continue, the evacuation of the information stored in this dynamic storage area is suspended.

That is, for any completed call, the process of saving the information stored in the dynamic storage area to the external storage or other means is not activated unless the hold time exceeds the longest time described above.

Therefore, these external storages and other means are used for saving information relating only to completed calls having a long hold time, and the amount of processing that must be provided in the call processing means 14 can be reduced. Claims 1 to 3
In the third invention related to the invention described in (1), the call processing means 1
No. 4 withdraws only when the attribute of the subscriber who has generated the completed call satisfies a predetermined condition.

That is, the information stored in the dynamic storage area is saved to the external storage or other means only when there is a large possibility that the hold time of the corresponding completed call becomes longer under the above-mentioned attributes. . Therefore, as compared with the case where the above-described evacuation is performed irrespective of such a possibility, the margin of the processing amount is secured and the resources are effectively used.

According to the fourth aspect of the present invention, the call processing means 14 stores the information required to store information essential for the completion of the call processing in the course of the termination of the completed call. Priority is given to the target storage area. In other words, even in the congested state or the busiest, the call processing of the completed call to be eliminated is
Unnecessarily delayed or completed without delay.

Therefore, the resources allocated to each completed call are released efficiently, and the service quality is maintained at a high level. According to the fifth aspect of the present invention, the call processing means stores non-priority information which does not correspond to information essential for the completion of the call processing in the course of the termination of the completed call. When a dynamic storage area to be secured is not secured, the processing related to the non-priority information is omitted.

That is, for any completed call, if the dynamic storage area cannot be secured due to the congestion state or call concentration, it is possible to prevent the hold time from effectively increasing. Therefore, the utilization efficiency of the dynamic storage area and other resources can be improved without lowering the service quality.

According to the sixth aspect of the present invention, the call processing means 14 is provided only when the attribute of the subscriber who has caused the completed call to disappear is a predetermined attribute. Then, the release of the dynamic storage area in which the information related to the completed call is stored is suspended. Further, the call processing means 14
Applies its dynamic storage to call processing for calls that subsequently occur to this subscriber.

That is, in the call processing of a call that subsequently occurs in response to the above-described operation performed by the subscriber, the dynamic storage area captured in the process of the call processing of the previously completed call that has disappeared continues. Applied. Therefore, a subscriber who can make such a call is provided with a high quality service even in a congested state or a busy hour.

[0037]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 2 is a diagram showing first to ninth embodiments of the present invention. In the figure, a plurality of n subscriber lines 22-1 to 22-2 are connected to ports of a switch 21.
-n and a plurality N of inter-station links 23-1 to 23-N are connected,
The control terminal of the switch 21 is connected to a specific input / output port of the call processor 24. An external storage 25 is connected to the call processor 24, and a maintenance / operation processor 27 is connected to a bus terminal of the call processor 24 via a bus 26.
And an input / output processor 28 are connected. The maintenance processor 27 is connected to a display device 29, a keyboard 30 and other devices provided for a man-machine interface, and the input / output processor 28 is connected to a charging center (not shown) via a communication link 31.

FIG. 3 is a diagram for explaining the operation of the first embodiment of the present invention. FIG. 4 is an operation flowchart of the first embodiment of the present invention. Hereinafter, the operation of the first embodiment of the present invention will be described with reference to FIGS.

First, the basic operations performed by the respective units in conjunction with the call processing performed for calls originating on the subscriber lines 21-1 to 21-n and the interoffice links 22-1 to 22-N. Will be described.
The switch 21 monitors events occurring on the subscriber lines 21-1 to 21-n and the inter-office links 22-1 to 22-N based on a predetermined signal system, and transmits the events to the subscriber line 21-1, for example. When the occurrence of the call is identified, the fact is notified to the call processor 24 (FIG. 3 (1)).

Note that, for this outgoing call,
For the sake of simplicity, it is assumed that the call is to be terminated at a terminal accommodated in another exchange connected via the interoffice link 23-1. The call processor 24 activates the call processing of the outgoing call in response to the event notified in this way (FIG. 3 (2)). In the course of this call processing, the maintenance / communication connected via the bus 26 is performed. The following processing is performed by linking with the switch 21 in conjunction with the operation processor 27 and the input / output processor 28.

-Number analysis and route selection (Fig. 3 (3))-Formation and release of a communication path (Fig. 3 (4))-Collection of information (including billing information) related to the corresponding outgoing call (Fig. 3) 3 (5))-Transmission of the billing information of the outgoing call to the above-mentioned billing center (Fig. 3 (6))-Of the information related to the outgoing call, information to be provided for maintenance and operation (for example, service audit) Related information)
Notification to the maintenance / operation processor 27 (FIG. 3 (7)) In any of the embodiments described below, the basic procedure of the call processing performed by the call processor 24 is not a feature of the present invention, but a feature of the present invention. The present invention can be realized by applying various known techniques, and a description thereof will be omitted.

When the call processor 24 identifies that the above-mentioned outgoing call is a completed call, the call processor 24 outputs various information (intermediate history information) generated or obtained in the course of the call processing related to the outgoing call. "Dynamic storage area" stored
Of these, the "dynamic storage area" (hereinafter, referred to as "restorable area") storing the following information is released (FIG. 3A,
FIG. 4 (1)).

Information that can be newly generated in the process of terminating (disconnecting) the corresponding completed call. Information that cannot be referred to in the process of terminating the call. Of these, a storage area that does not correspond to the above-described “restorable area” is simply referred to as a “maintenance area”. Further, in the process of ending the call of the completed call, the call processor 24 determines, among the information stored in the above-described “restorable area”, information to be calculated in the process of the ending call, Restoration is performed based on information continuously stored in the “dynamic storage area” and other information (may be information stored in the “static storage area”) (FIG. 3B, FIG. 4 (2)).

The information to be calculated in the above-described call termination process includes, for example, "link information" indicating a combination of a trunk and other resources allocated to the corresponding completed call. The storage area in which the information restored in this way is to be stored is newly allocated under the area management performed by the operating system provided in the call processor 24 for simplicity. Assume "dynamic storage area".

Further, the call processor 24 appropriately refers to the information stored in the “static storage area” together with the information thus restored and the information stored in the “maintenance area”. To perform a call termination process (see FIG. 3).
(c), FIG. 4 (3)). That is, for any call determined to be a completed call, of the “dynamic storage area” in which information related to the call is stored, the above-mentioned “restorable area” is the time at which this call becomes a completed call. , And the call termination processing is performed based on a regular procedure without any trouble.

As described above, according to the present embodiment, the average value of the time during which the “dynamic storage area” in which the information on the regular call is temporarily stored is captured is significantly reduced as compared with the conventional example. Therefore, even if the average hold time of a completed call is extremely long, the call processing is performed smoothly without increasing the main memory of the call processor 24.

FIG. 5 is a diagram for explaining the operation of the second and third embodiments of the present invention. In the figure, the same processes as those shown in FIG. 3 are denoted by the same reference numerals and symbols, and description thereof is omitted here. FIG.
7 is an operation flowchart of the second and third embodiments of the present invention. In the figure, the same processes as those shown in FIG. 4 are given the same numbers and symbols,
Here, the description is omitted.

Hereinafter, the operation of the second embodiment of the present invention will be described with reference to FIG. 2, FIG. 5, and FIG. The difference between this embodiment and the first embodiment is that the call processor 24
And a process that is performed at the time when the call termination process of the completed call is started.

The call processor 24 sets the "restorable area"
(The "maintenance area" may be included.) For the release (FIGS. 5 (a) and 6 (1)), the stored information is replaced with the corresponding outgoing call (completed call). The record (or file) associated with the identifier is saved in the external storage 25 (FIGS. 5A and 6A). Also, the call processor 24
When the call termination processing of the corresponding completed call is started, a storage area (hereinafter, referred to as an “alternative storage area”) in place of the “restorable area” described above is captured (FIGS. 5B and 6B). ).

Further, the call processor 24 stores the contents of the record corresponding to the identification call of the completed call among the records previously saved in the external storage 25 in the above-mentioned "alternative storage area" (FIG. 5). (C), FIG. 6 (C)). Further, the call processor 24 refers to the “alternate storage area” instead of the “restored storage area” and the “maintenance area”, and reads the information restored on the “alternative storage area” and “ "Merge processing" to eliminate information that is duplicated in both "Restoration storage area"
5 (D) and FIG. 6 (D), the call termination processing of the completed call is performed based on the same procedure as the above-described first embodiment (FIG. 5 (E)). FIG. 6 (E)).

That is, for any completed call, the “restored storage area” or “dynamic storage area” is stored in the external storage 25.
And does not occupy the main memory of the call processor 24. Therefore, according to the present embodiment, even if the average hold time of a completed call is longer than that of the first embodiment described above, the call processing is performed without increasing the main memory of the call processor 24. It is performed smoothly.

In the present embodiment, the above-mentioned "merge processing" is performed at the start of the call termination processing. However, such “merge processing” need not be performed at all if the above-mentioned “duplicate information” cannot be generated. In the second and third embodiments described above, in addition to the information stored in the “restorable area”,
Information stored in the “maintenance area” is also saved in the external storage 25.

However, the present invention is not limited to such a configuration. If the increase in the processing amount of the call processor 24 is small enough to be tolerated at the peak time,
The data may be saved in the external storage 25 while being subjected to the compression processing, and may be appropriately expanded when read. Hereinafter, FIG.
The operation of the third embodiment of the present invention will be described with reference to FIGS.

The difference between this embodiment and the above-described first embodiment lies in the following processing procedure performed by the call processor 24. The call processor 24 externally stores the information stored in the “maintenance area” in the “dynamic storage area” as a record (or file) associated with the identifier of the corresponding outgoing call (completed call). 25 (Fig. 5 (A),
After FIG. 6 (A)), it is released together with the “restorable area” (FIG. 5).
(a), FIG. 6 (1)).

When the call processor 24 starts the call termination processing of the corresponding completed call, first, the call processor 24 captures a storage area (hereinafter, referred to as an "alternative security area") in place of the "security area" described above (referred to as "alternative security area"). 6 (F)), and among the records saved in the external storage 25, the contents of the record corresponding to the identifier of the completed call are stored in the above-mentioned “alternative maintenance area” (FIG. 6 (G)).

Further, except that the call processor 24 refers to the “alternative security area” instead of the “security area”,
The call termination processing of the completed call is performed based on the same procedure as in the above-described first embodiment (FIGS. 5F and 6F). That is, for any completed call, all information stored in the “dynamic storage area” is saved in the external storage 25.

Therefore, according to the present embodiment, even if a number of completed calls having a long hold time are in parallel, the call processing can be smoothly performed without increasing the main memory of the processor 24. Done. In the present embodiment, it is assumed that the amount of information to be stored in the “maintenance area” is a constant value.

However, the present invention is not limited to such a configuration. For example, when the amount of valid information to be stored in the "security area" increases or decreases for each call, the corresponding call is regarded as a completed call. The amount of information is confirmed at the time when it is determined as, and in the process of the end-of-call processing, an “alternate maintenance area” of a size equal to or more than this information amount is secured, so that the vacant area of the main memory is effectively used Is also good.

FIG. 7 is an operation flowchart of the fourth embodiment of the present invention. In the figure, the same processes as those shown in FIG. 6 are denoted by the same reference numerals and symbols, and description thereof is omitted here. Hereinafter, the operation of the fourth embodiment of the present invention will be described with reference to FIGS. The difference between this embodiment and the previously described third embodiment is that
The following procedure is performed by the call processor 24.

First, as shown by hatching in FIG. 8, the static storage area has the corresponding resource out of the information to be stored in the “secure area” described in the third embodiment. A field (hereinafter, referred to as an "additional field") in which a set of information (hereinafter, simply referred to as "dynamic information") that can be identified based on the identifier of the resource and is related to the completed call to which the. Is added.

When the call processor 24 identifies a call to be a completed call, the call processor 24 specifies dynamic information corresponding to the completed call (FIG. 7 (a)). Further, the call processor 24 classifies the dynamic information into a set of information corresponding to a resource identifier to be applied as a pointer when referred to in the course of the call termination processing (hereinafter, referred to as “segment information”). (Figure 7
(b)).

In addition, the call processor 24 stores the “partition information” individually corresponding to the “additional field” of the record corresponding to the resource identifier to be applied as these pointers among the records of the static storage area described above. Is stored (FIG. 7 (c)), the "maintenance area" is released similarly to the "restorable area" (FIG. 7 (d)). By the way, the call processor 24
When starting the call termination process of the corresponding completed call, first, a storage area (hereinafter, referred to as a “maintenance area”) instead of the above “maintenance area”
It is called "alternative maintenance area". ) Is captured (FIG. 7 (F)).

Further, among the information saved as “sort information” in the static storage area, the call processor 24 stores “sort information” corresponding to the identifier of each resource allocated to the above-mentioned completed call in a predetermined manner. By storing the information of the format in the “alternative maintenance area” (FIG. 7 (G)), a set of these “section information” is restored. Also, the call processor 24
Refers to the "alternative maintenance area" and performs the call termination processing of the completed call based on the same procedure as in the third embodiment described above.

That is, for any completed call, the information stored in the “maintenance area” is saved in the “static storage area” arranged on the main memory of the call processor 24 as the “partition information” described above. And restored as appropriate. Therefore, even when a large number of completed calls having a long hold time can survive in parallel, the call processor has such a degree that all of the “partition information” related to these completed calls are saved in the “static storage area”. As long as the size of the main memory 24 is large, the call termination processing of each completed call is performed smoothly.

Further, the individual resources allocated to these completed calls are efficiently reused, and the service quality can be improved together with the avoidance of the acceleration of the congestion state and the quick departure from the congestion state. Becomes FIG. 9 is an operation flowchart of the fifth to eighth embodiments of the present invention. In the figure, the same processes as those shown in FIG. 4 are denoted by the same reference numerals and symbols, and description thereof is omitted here.

The operation of the fifth embodiment of the present invention will be described below with reference to FIGS. The difference between this embodiment and the third embodiment described above lies in the procedure of the following processing performed by the call processor 24. When the call processor 24 identifies a call to be a completed call, information satisfying the following conditions (hereinafter, referred to as “simple restoration information”) among information stored in the “dynamic storage area” related to the completed call. ) Is specified (FIG. 9A).

It is stored in the above-mentioned “restorable area”. At the point in time when the corresponding call becomes a completed call, all the information to be referred to in the course of the restoration process described below (hereinafter referred to as “restoration basic information”) has been determined. -It is referred to or likely to be referred to by the call processor 24 during the call termination processing.

The call processor 24 performs the following processing on the individual “simple restoration information” described above. -Acquire all the corresponding "restoration basic information", and generate "combination information" indicating a combination of these "restoration basic information" in a predetermined format (FIG. 9 (b)). -The "combination information" is sequentially stored in the "maintenance area" based on a predetermined arrangement (FIG. 9C).

Further, when the call processor 24 starts the end processing of the corresponding completed call, a storage area (hereinafter, referred to as an “alternative restorable area”) replacing the previously released “restorable area” is released. Is captured (FIG. 9 (d)). Also,
The call processor 24 determines whether each of the individual "combinations" stored in the "maintenance area" is satisfied only when the termination processing satisfies a predetermined condition (for example, the service order of the source or destination of the corresponding completed call). The corresponding “simple restoration information” is sequentially restored based on the “information” (FIG. 9 (e)) and stored in the “alternative restoration possible area” described above (FIG. 9 (f)).

Further, the call processor 24 performs the termination processing of the corresponding completed call based on the same procedure as that of the third embodiment described above, except that the "simple restoration information" is referred to (FIG. 9 (h)). In other words, of the information stored in the “restorable area”, for information for which it is relatively easy to obtain an operation target of the restoration processing to be performed in the process of the end call processing,
Until the end of the call processing, the information is held in the “maintenance area” as the “combination information” described above.

Therefore, the load on the call processor 24 can be reduced as compared with the case where all the information stored in the “restorable area” is newly restored in the process of the call termination processing. Hereinafter, the operation of the sixth embodiment of the present invention will be described with reference to FIGS. The difference between this embodiment and the above-described fifth embodiment lies in the following processing procedure performed by the call processor 24 in the process of processing a call to be a completed call.

The call processor 24 releases the "restorable area" until a predetermined time (about 30 seconds to 1 minute) elapses from the time when the call to be completed is identified. The processing for realizing the present invention will be forgotten (FIG. 9A). Note that such time is, for example, “dynamic storage area” in the storage area of the main storage of the call processor 24.
Given the size of the empty storage area (or the measured value of that size) that can be allocated to any call as well as the distribution of calls, it is given as the maximum hold time at which a defined call completion rate is achieved.

That is, for a completed call whose hold time is shorter than the above-mentioned time, the “restorable area” is released, the “alternative restorable area” is captured, and the “restorable area” and the “dynamic storage area” described above are used. The call processing is performed without unnecessary saving and restoring of the contents of “” in the external storage 25.
Therefore, it is possible to prevent the load on the call processor 24 from unnecessarily increasing as the number of completed calls whose hold time is equal to or shorter than the above-described time increases.

The operation of the seventh embodiment of the present invention will be described below with reference to FIGS. The difference between this embodiment and the sixth embodiment described above lies in the following conditions in which the call processor 24 cancels the processing for releasing the “restorable area” and the processing performed subsequent to the processing. When the call processor 24 identifies a call to be a completed call, the information is given in advance as station information and, out of the information stored in the “static storage area”, the source and / or the source of the completed call are determined. One of the service orders (including the caller class and the callee class) is referenced (FIG. 9B).

Further, the call processor 24 determines whether or not the service order satisfies a predetermined condition (for example, "the called party class indicates the service point of the Internet provider") (FIG. 9). (C)), if the result of the determination is false, as described above, a process of releasing the “restorable area”, and the process is performed following the process,
In addition, the processing for realizing the present invention is forgotten.

That is, for a completed call that has occurred (received) to a subscriber for whom the above conditions are not satisfied, the “restorable area” is released, the “alternative restorable area” is captured, and the “restorable area” and the already described External storage 25 of contents of “dynamic storage area”
Call processing is performed without unnecessary saving and restoring of. Therefore, compared to the case where the present invention is applied regardless of the attribute of the completed call,
Unnecessarily increasing the load on the call processor 24 is avoided.

In the present embodiment, the above-described determination is performed based on both or both of the service order of the caller and the receiver. However, the criterion for such determination is not limited to the service order described above, but may be, for example, the following items. The degree of traffic distribution and / or congestion on the incoming route where the relevant completed call occurred and / or the outgoing route obtained as a result of the number analysis of the completed call; Signaling system applied to the route ・ The degree of congestion or overload in each part of the switching system that has resources to be allocated or to be allocated to this completed call ・ Time period during which the completed call occurred FIG. 12 is a diagram for explaining the operation of the eighth embodiment of the present invention.

The operation of the eighth embodiment of the present invention will be described below with reference to FIGS. The difference between this embodiment and the above-described fifth to seventh embodiments is that the call processor 24 performs the following processing in the process of ending a completed call in which the “restorable area” is released. is there. In the course of the above-mentioned completed call termination processing, the call processor 24
By issuing a predetermined system call to the above-described operating system, the information to be subjected to the call termination processing among the information stored prior to the “restorable area” is restored and stored. Attempt to capture the "dynamic storage area" that should be.

When such capture of the “dynamic storage area” is achieved, the call processor 24 continues the processing according to the same procedure as in the first embodiment without performing any special processing. I do. However, if the "dynamic storage area" could not be captured, the call processor 24
Is information that must be subjected to predetermined processing in the course of the call termination processing, such as billing information, among information saved at the time when the corresponding completed call occurs (hereinafter simply referred to as “essential information”). . ") (FIG. 9D).

Further, the call processor 24 issues a system call to the operating system again, so that the above essential information among the information stored before the “restorable area” is restored and stored. An attempt is made to capture a "dynamic storage area" having the minimum size to be acquired (FIG. 9E). The call processor 24 repeatedly attempts to secure the “dynamic storage area” by issuing the above-mentioned system call at a predetermined frequency until such capture of the “dynamic storage area” is achieved. .

When the "dynamic storage area" can be captured, the call processor 24 restores the essential information (FIG. 9 (F)) and places it on the "dynamic storage area". Store,
The call termination process is performed by appropriately referring to the information stored in the “static storage area” together with the essential information and the information stored in the “maintenance area”.

That is, even if most of the storage areas of the main storage of the call processor 24 are allocated to some calls as "dynamic storage areas", the functions which must be provided as exchanges are provided. Is secured, and efficient end-of-call processing is promoted. As described above, according to the present embodiment, the size of the “dynamic storage area” to be newly captured in the course of the call termination processing is constant regardless of the attribute of the completed call in which the call termination processing is to be performed. Release of the previously acquired “dynamic storage area” is performed more smoothly than in a certain case.

Accordingly, the utilization efficiency of the “dynamic storage area” is enhanced, acceleration of the congestion state is suppressed, and the speed of departure from the congestion state is increased. In the present embodiment, the capture of a “dynamic storage area” to be used for restoring and storing information that does not correspond to essential information, and the call termination processing to be performed based on the information are omitted.

However, the present invention is not limited to such a configuration. For example, for any completed call, after the process of releasing the capture of the “dynamic storage area” is preferentially performed, The inconsistency resulting from the omission of the processing may be eliminated by restoring the information that does not apply and the processing to be performed based on the information within the processing amount of the call processor 24.

FIG. 10 is an operation flowchart of the ninth embodiment of the present invention. Hereinafter, the operation of the ninth embodiment of the present invention will be described with reference to FIGS. The difference between this embodiment and the first to eighth embodiments described above is as follows.
The following processing procedure is performed by the call processor 24 when the termination processing of each completed call is completed. Call processor 24
When the call termination process is completed, regarding the completed call subjected to the call termination process, the type of the call and the subscriber information of both or one of the caller and the caller (including the service order). It is determined whether or not a predetermined condition is satisfied by referring to all or a part of FIG.
(1)).

Note that such a condition corresponds to, for example, that the corresponding completed call is a conference call and that only the source of the conference call can be re-transmitted. Further, when the result of such determination is false, the call processor 24 immediately releases the “alternate storage area”.
However, if the result of the determination is true, the call processor 24 suspends the release of the “alternate storage area” for a period that meets the above-mentioned conditions (FIG. 10B), and A predetermined event which can be notified as a signaling signal (line signal) from a caller or a callee is waited for below (FIG. 10 (3)).

In addition, the call processor 24 determines that no such event has occurred within the time period described above.
The "alternative storage area" is released (FIG. 10 (4)). However, if the above-mentioned event occurs within that period, the call processing adapted to the event is started without releasing the “alternate storage area” (FIG. 10 (5)), and the call processing Then, this “alternative storage area” is applied instead of the “dynamic storage area” to be newly captured.

That is, if the completed call for which the call termination processing has been completely completed corresponds to a call that satisfies the above-described conditions, the call processing to be started in response to a request issued by the caller or destination of the call. In the process, the “alternate storage area” whose release is suspended is applied as the “dynamic storage area”. Therefore, compared to the case where a “dynamic storage area” must be newly acquired in the process of call processing for all calls that have occurred even in a congested state or the busiest time, the smooth execution of the call processing and the service can be achieved. Quality is improved.

In this embodiment, a conference call is shown as an example of a completed call once the call termination processing is completed. However, the present invention is not limited to such conference calls, and may be, for example, a credit call, a transfer call, or any other call. Further, in each of the above-described embodiments, the present invention is applied to a subscriber line exchange connected to a circuit-switched public telephone network.

However, the present invention is not limited to such a subscriber line switch, and any node device connected to a connection-type communication network can be used in any of the storage exchange and the message exchange. Applicable. Further, in each of the above-described embodiments, the present invention is realized as software executed by the call processor 24 that performs call processing in cooperation with the maintenance / operation processor 27 and the input / output processor 28.

However, the present invention is not limited to an exchange having such a configuration, and can be applied to a node device in which function distribution and load distribution are achieved in any form. The present invention can be similarly applied to an exchange in which all processing including call processing is performed by a single processor. Further, in each of the above-described embodiments, processing including a man-machine interface relating to maintenance and operation is performed by the maintenance / operation processor 27, and charging information collection and transmission of the charging information to the charging center are performed by the input / output processor 28. Has been done by

However, according to the present invention, the maintenance / operation and AMA (A
utomatic Message Accounting), and is not limited to an exchange in which the hardware and software provided for it are incorporated.For example, as in the private branch exchange described above, functions related to maintenance and operation are realized by separate tools, and The present invention is similarly applicable to an exchange in which no generation and transmission of charging information is performed.

In each of the above embodiments, no detailed configuration of software executed by the call processor 24 and realizing call processing is disclosed. However, such a configuration (including a task configuration) is not a feature of the present invention, and a description thereof will be omitted.
Furthermore, the present invention is not limited to the above-described embodiments, and various embodiments can be made within the scope of the present invention, and any or all of the constituent devices are improved in any way. Is also good.

Hereinafter, the configurations of the invention disclosed in the above-described embodiments will be arranged hierarchically and multilaterally, and will be sequentially listed as additional items. (Supplementary Note 1) Network interface means 11 for interfacing with a connection-type communication network, static storage means 12 for storing information related to operation and management of resources provided for the interface, and main memory 13 are provided. In addition to performing call processing for a call that has occurred in its own station, it captures an empty storage area among the storage areas of its main storage 13 as a dynamic storage area in which information related to this call is to be stored. A call processing means 14 for appropriately referring to the storage area of the static storage means 12 in conjunction with the dynamic storage area, wherein the call processing means 14 Releasing the captured dynamic storage area when:

(Supplementary Note 2) Network interface means 11 for interfacing with a connection-type communication network, static storage means 12 for storing information related to operation and management of resources provided for the interface, and main storage 1
3 and performs call processing for a call that has occurred in its own station, and captures a vacant storage area among the storage areas of its main memory 13 as a dynamic storage area in which information relating to this call is to be stored. And the static storage means 1 in accordance with the dynamic storage area.
In the node device including the call processing means 14 for appropriately referring to the storage area of No. 2 and the external storage 15, the call processing means 14 determines whether the call generated in the own station is a completed call.
Of the information stored in the dynamic storage area, information related to the completed call is saved in the external storage 15, the dynamic storage area in which the information is stored is released, and the information is saved in the external storage 15. Characterized in that the restored information is restored in a process in which the completed call disappears.

(Supplementary Note 3) In the node device described in Supplementary Note 2, the call processing unit 14 can perform restoration based on information stored in both or one of the static storage unit 12 and the main storage 13. A node device that excludes unnecessary information from objects to be saved in the external storage 15.

(Supplementary Note 4) The node device according to Supplementary Note 2 or 3, wherein the call processing means 14 compresses information related to the completed call and saves the information in the external storage 15. (Supplementary Note 5) In the node device according to any one of Supplementary Notes 2 to 4, the call processing unit 14 may be configured to restore the information generated based on the call processing procedure and stored in the dynamic storage area. A node device for merging information with the received information.

(Supplementary Note 6) Network interface means 11 for interfacing with a connection-type communication network, static storage means 12 for storing information relating to the operation and management of resources provided for the interface, and main storage 1
3 and performs call processing for a call that has occurred in its own station, and captures a vacant storage area among the storage areas of its main memory 13 as a dynamic storage area in which information relating to this call is to be stored. And the static storage means 1 in accordance with the dynamic storage area.
And a call processing means 14 for appropriately referring to the storage area of the second station, wherein the call processing means 14, when a call generated in the local station becomes a completed call, a resource in which the completed call is generated The information related to the completed call is saved in the storage area of the static storage unit 12 corresponding to any one of the resources allocated to the completed call and the resource allocated to the completed call, and the dynamic storage area storing the information is released. A node device for restoring the information saved in the storage area of the static storage means 12 in the process of erasing the completed call.

(Supplementary Note 7) Network interface means 11 for interfacing with a connection-type communication network, static storage means 12 for storing information relating to the operation and management of resources provided for the interface, and main storage 1
3 and performs call processing for a call that has occurred in its own station, and captures a vacant storage area among the storage areas of its main memory 13 as a dynamic storage area in which information relating to this call is to be stored. And the static storage means 1 in accordance with the dynamic storage area.
And a call processing means 14 for appropriately referring to the storage area 2 when the call originating at the own station becomes a completed call. And saves the information relating to the completed call to the dynamic storage area as secondary information which is the basis for restoring the information, releases the excess storage area of the dynamic storage area, and A node device for restoring the secondary information in the process of disappearing.

(Supplementary Note 8) In the node device according to any one of supplementary notes 1 to 7, the call processing means 14
The dynamic storage area in which the information related to the completed call is stored is stored in the dynamic storage area until the maximum time allowed to continue to be captured from the time when the completed call is generated. A node device for which evacuation is suspended.

(Supplementary Note 9) In the node device according to Supplementary Note 8, the call processing means 14 is characterized in that the call processing unit 14 cancels the evacuation only when the attribute of the subscriber who has generated the completed call satisfies a predetermined condition. Node device.

(Supplementary note 10) In the node device according to any one of Supplementary notes 1 to 9, the call processing means 14
Is a node device that preferentially captures a dynamic storage area in which information essential for the completion of call processing is to be stored in the course of disappearance of a completed call.

(Supplementary Note 11) In the node device according to Supplementary Note 10, the call processing unit 14 may be configured to dynamically store non-priority information that does not correspond to information essential for the completion of the call processing in the process of disappearing the completed call. A node device wherein when a storage area is not secured, a process relating to the non-priority information is omitted.

(Supplementary Note 12) In the node device according to any one of Supplementary Notes 1 to 11, the call processing means 14
Only suspends the release of the dynamic storage area in which the information related to the completed call has been stored, and the subsequent A node device characterized in that the dynamic storage area is applied to the call processing of a call that occurs.

[0105]

As described above, according to the first aspect of the present invention, even when the average hold time of a completed call is a large value, a plurality of dynamic storage areas of the main storage storage area are provided. It is efficiently used for call processing of calls, and the probability of occurrence of a congestion state or a call loss due to such a shortage of the dynamic storage area is reduced.

According to the second and third aspects of the present invention, even when the average hold time of a completed call is a large value, information to be referred to in the course of the call processing of all the completed calls that have occurred. Is prevented from being lost, and the probability that a congestion state or a call loss occurs due to the shortage of the dynamic storage area is reduced as in the first aspect of the present invention. Further, according to the invention of the lower concept of the invention described in claim 2, the amount of information to be stored in parallel in the external storage is such that a large number of completed calls having a long holding time are in parallel. Is also reduced to a small value.

Further, according to the invention of the first sub-concept of the inventions described in claims 2 and 3, as long as there is a sufficient margin in the processing amount, the speed-up of the disappearance of the completed calls can be increased in conjunction with the cost reduction. It is planned. In the invention of the second subordinate concept of the invention described in claims 2 and 3, the present invention can be applied without changing the basic configuration of software for realizing call processing. .

Further, according to the first aspect of the present invention, as long as the amount of processing required for restoring information is ensured, no external storage or other means is required. The utilization efficiency of the dynamic storage area is improved. According to the second aspect of the present invention, the external storage and other means must be provided for saving information relating to only completed calls having a long hold time and must be provided. The amount of processing can be reduced.

Further, according to the third aspect of the present invention, the contents of the dynamic storage area are saved irrespective of the possibility that the hold time of the completed call becomes longer. Compared with the case, the margin of the processing amount is secured and the resources are effectively used. According to the fourth aspect of the present invention, the resources allocated to each completed call are efficiently released, and the service quality is maintained at a high level.

Furthermore, in the fifth aspect of the present invention, the utilization efficiency of the dynamic storage area and other resources can be improved without lowering the service quality. Further, in the sixth invention relating to the inventions according to claims 1 to 3, a subscriber who can subsequently generate a call in response to an operation is high even in a congested state or a busy hour. Service is provided with quality.

Therefore, in the communication network to which these inventions are applied, it is possible to provide various communication services with high quality at low cost without adding hardware or changing the basic configuration.

[Brief description of the drawings]

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

FIG. 2 is a diagram showing first to ninth embodiments of the present invention.

FIG. 3 is a diagram illustrating an operation of the first embodiment of the present invention.

FIG. 4 is an operation flowchart of the first embodiment of the present invention.

FIG. 5 is a diagram illustrating the operation of the second embodiment of the present invention.

FIG. 6 is an operation flowchart of the second and third embodiments of the present invention.

FIG. 7 is an operation flowchart of a fourth embodiment of the present invention.

FIG. 8 is a diagram illustrating a configuration of a static storage area according to the present embodiment.

FIG. 9 is an operation flowchart of the fifth to eighth embodiments of the present invention.

FIG. 10 is an operation flowchart of a ninth embodiment of the present invention.

FIG. 11 is a diagram illustrating a configuration example of a static storage area.

FIG. 12 illustrates a configuration example of a dynamic storage area.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Network interface means 12 Static storage means 13 Main storage 14 Call processing means 15, 25 External storage 21 Switch 22 Subscriber line 23 Inter-station link 24 Call processor 26 Bus 27 Maintenance / operation processor 28 Input / output processor 29 Display device 30 Keyboard 31 Communication Link

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Teichi Minami 4-1-1, Kamiodanaka, Nakahara-ku, Kawasaki City, Kanagawa Prefecture Inside Fujitsu Limited (72) Inventor Miyuki Nishiyama 4-chome Kamiodanaka, Nakahara-ku, Kawasaki City, Kanagawa Prefecture No. 1 No. 1 F-term in Fujitsu Limited (reference)

Claims (3)

[Claims] 1. A network interface means for interfacing with a connection-type communication network; static storage means for storing information relating to operation and management of resources provided for the interface; In addition to performing call processing for a call that has occurred in its own station, it captures a vacant storage area of its main storage area as a dynamic storage area where information relating to this call is to be stored, and A call processing means for appropriately referring to a storage area of the static storage means in combination with a storage area, wherein the call processing means, when a call generated in the own station becomes a completed call, A node device for releasing a captured dynamic storage area. 2. Network interface means for interfacing with a connection-type communication network, static storage means for storing information related to operation and management of resources provided for the interface, and main memory, In addition, it performs call processing for calls that occurred in its own station,
Among the storage areas of the main storage, an empty storage area is captured as a dynamic storage area where information related to this call is to be stored, and the storage area of the static storage means is combined with the dynamic storage area. In a node device comprising: a call processing unit to be referred to as appropriate; and an external storage, the call processing unit, when a call generated in the own station becomes a completed call, the call processing of the information stored in the dynamic storage area. Saving the information related to the completed call in the external storage, releasing the dynamic storage area storing the information, and restoring the information saved in the external storage to the completion of the completed call A node device characterized in that: 3. Network interface means for interfacing with a connection-type communication network, static storage means for storing information relating to operation and management of resources provided for the interface, and main memory; In addition, it performs call processing for calls that occurred in its own station,
Among the storage areas of the main storage, an empty storage area is captured as a dynamic storage area where information related to this call is to be stored, and the storage area of the static storage means is combined with the dynamic storage area. A call processing means for appropriately referring to the node device, wherein the call processing means, when a call generated in the own station becomes a completed call, is allocated to the resource in which the completed call has occurred and the completed call. The information related to the completion call is saved in the storage area of the static storage means corresponding to any of the resources, and the dynamic storage area in which the information is stored is released, and A node device for restoring information saved in a storage area in a process in which the completed call disappears.