JP2010212990A - Call control unit, method, and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To allow call control applications and call control information updated in a main memory to be stored in nonvolatile memory. <P>SOLUTION: A call control unit generates a RAM disk region section on a volatile memory, loads call control applications and call control information stored in a nonvolatile memory to the volatile memory for call processing, and stores write information to the nonvolatile memory in the RAM disk region. The call control unit includes an update detection processing means for detecting write information to a region in the nonvolatile memory for storing the call control application and call control information loaded to the volatile memory by call processing from write information of a RAM disk region, and a write processing means for writing write information to regions of call control applications and call control information out of write information in a RAM disk region to the nonvolatile memory, based on detection by the update detection processing means. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a call control apparatus, method, and program, and for example, appropriately stores call control information (for example, station data, subscriber data, etc.) updated in a main memory of a switch and a call control application in a nonvolatile memory. The present invention can be applied to call control apparatuses, methods, and programs.

  Conventional electronic exchanges generally have a configuration in which a call control application and station data that are operated in an exchange system are stored in a volatile memory.

  When the electronic switch is turned on, the call control application and station data are loaded from the non-volatile memory into the volatile memory. Therefore, when updating the call control application and station data of the electronic exchange, the update work to the volatile memory for data update in operation and the nonvolatile data to be read at the next startup of the electronic exchange Two update operations, that is, an update operation to the volatile memory are required.

  In addition, as a modern electronic exchange, adopting DIMM (Dual Inline Memory Module) as volatile memory and SSD (Solid State Drive) as nonvolatile memory, application of volatile memory and nonvolatile memory management method by RAM disk There is.

  Even in a modern electronic exchange, when a call control application and station data are updated, it is necessary to update both the volatile memory and the nonvolatile memory.

  For example, the technique described in Patent Document 1 describes a technique in which an operator controls a memory write program and a memory read program of an exchange from a maintenance console and puts information in and out of the memory.

  Further, as a configuration of a modern electronic exchange, for example, a general-purpose PC / AT compatible MB (Main Bord) having an SSD as an external storage device and having a DIMM as a main memory can be cited.

  In this case, there is a case in which a RAM disk is formed on the DIMM and a virtual disk technology that can handle the DIMM like a storage device may be used. However, since the RAM disk area is a virtual disk area created in volatile memory (DIMM), for example, if the power supply to the exchange is cut off due to a power failure or the like, the data on the RAM disk is erased when the exchange is reset. For this reason, it is necessary to appropriately reflect the contents of the RAM disk on the SSD.

  As a virtual disk technology applied to the RAM disk, there is EWF (Enhanced Write Filter) and the like. For example, Patent Document 2 shows a method of writing the contents of a RAM disk to a magnetic disk by DMA transfer.

Japanese Patent Laid-Open No. 5-300229 JP-A-2-39342

  By the way, in a general-purpose MB which has a nonvolatile memory SSD storage device and a volatile memory DIMM memory and operates by forming a RAM disk on the DIMM, when the power is turned on and the OS starts up For example, disk I / O is generated to store OS status information, OS startup log, network access log, call control application startup log, billing information generated by call control, and the like. This disk I / O is stored as write information in the RAM disk area by the EWF mechanism.

  In addition, for example, when a worker upgrades a call control application stored in the SSD to correct a bug or add a function, or when updating station data as the number of terminals accommodated in an exchange increases or decreases, for example. Also, disk I / O is performed, and the disk I / O is stored as write information in the RAM disk area by the EWF mechanism.

  However, the call control application and the station data are the minimum necessary elements for the exchange and need to be immediately stored in the SSD.

  Further, since the SSD of a nonvolatile memory applied as a storage device has a limit in the number of times of writing / deleting (for example, 100,000 times), the number of times of writing / deleting to the SSD is reduced as much as possible to extend the life of the SSD. Is desired.

  Therefore, when the call control application and call control information (for example, station data) are updated, the content of the write information to the nonvolatile memory stored in the RAM disk area can be reflected on the nonvolatile memory, and Therefore, there is a need for a call control device, method, and program that can extend the life of a nonvolatile memory that has a limited number of write / delete operations.

  The call control device according to the first aspect of the present invention generates a RAM disk area on a volatile memory, loads a call control application and call control information stored in the nonvolatile memory into the volatile memory, and performs call processing. In the call control device that stores the write information to the nonvolatile memory in the RAM disk area, (1) the call control application and / or call control information loaded into the volatile memory by call processing from the write information in the RAM disk area Update detection processing means for detecting write information to the area of the non-volatile memory storing (2) a call control application and / or call control information area of the write information in the RAM disk area based on detection by the update detection processing means Write processing for writing write information to non-volatile memory Characterized in that it comprises means.

  The call control method according to the second aspect of the present invention creates a RAM disk area on a volatile memory, loads a call control application and call control information stored in the nonvolatile memory into the volatile memory, and performs call processing. In the call control method of the call control device for storing the write information for the nonvolatile memory in the RAM disk area, (1) the update detection processing means is loaded into the volatile memory by the call process from the write information in the RAM disk area. An update detection processing step for detecting write information to the area of the non-volatile memory for storing the call control application and / or call control information, and (2) the write processing means Write to the call control application and / or call control information area of the write information It characterized in that it has a write process to write to the nonvolatile memory information.

  A call control program according to a third aspect of the present invention generates a RAM disk area on a volatile memory, loads a call control application and call control information stored in the nonvolatile memory into the volatile memory, and performs call processing. And (1) a call control application and / or call control information loaded into the volatile memory by call processing from the write information in the RAM disk area. Update detection processing means for detecting write information to the area of the non-volatile memory storing (2) a call control application and / or call control information area of the write information in the RAM disk area based on detection by the update detection processing means Write processing for writing write information to non-volatile memory Characterized in that to function as a unit.

  According to the present invention, when the call control application and call control information (for example, station data) are updated, the contents of the write information stored in the RAM disk area can be reflected on the nonvolatile memory, and Thus, the lifetime of the nonvolatile memory in which the number of writing / deleting is limited can be extended.

It is a block diagram which shows the internal structure of the exchange of the 1st-5th embodiment. It is a block diagram which shows the structure of the telephone system of 1st-5th embodiment. 4 is a flowchart illustrating a writing process to a flash memory unit in the exchange according to the first embodiment. 4 is a flowchart illustrating a writing process to a flash memory unit in the exchange according to the first embodiment. It is a block diagram which shows the structure of the function part of the write-in process of 1st Embodiment. It is explanatory drawing explaining the write-in process to a flash memory part. It is a block diagram which shows the structure of the function part of the write-in process of 2nd Embodiment. 10 is a flowchart illustrating a writing process to a flash memory unit in the exchange according to the second embodiment. It is a block diagram which shows the structure of the function part of the write-in process of 3rd Embodiment. 14 is a flowchart illustrating a writing process to a flash memory unit in the exchange according to the third embodiment. It is explanatory drawing explaining the structure of the preservation | save area | region of a flash memory part, and rewriting of station data and a call control program. It is a block diagram which shows the structure of the judgment table which judges the writing to the flash memory part of 4th Embodiment. It is a block diagram which shows the structure of the judgment table which judges the writing to the flash memory part of 5th Embodiment.

(A) First Embodiment Hereinafter, a first embodiment of a call control device, method, and program of the present invention will be described with reference to the drawings.

  In the first embodiment, a RAM disk area is generated on a volatile memory, and a call control application and call control information (station data, subscriber data, etc.) stored in the nonvolatile memory are loaded into the volatile memory. An embodiment in which the present invention is applied to a call control apparatus that performs call control and stores write information to a nonvolatile memory in a RAM disk area will be described.

(A-1) Configuration of the First Embodiment FIG. 2 is an overall configuration diagram showing the overall configuration of the call system of the first embodiment. FIG. 1 is a configuration diagram showing the configuration of the exchange according to the first embodiment.

  In FIG. 2, the call system 10 of the first embodiment includes an exchange 1 and telephone terminals 2-1 to 2-n (n is a positive integer).

  In FIG. 1, the exchange 1 according to the first embodiment includes at least a control unit 11, a communication unit 12, a RAM unit 13, and a flash memory unit 15.

  The communication unit 12 transmits / receives information to / from a communication line to be connected according to a predetermined communication method. As the connection line of the communication unit 12, for example, an analog line, an IP (Internet protocol) line, a digital line, an optical line, or the like can be applied, and various communication methods can be applied.

  The control unit 11 controls the call control function of the exchange 1 and corresponds to, for example, a CPU.

  The RAM unit 13 is a volatile memory, and a DIMM can be applied. The RAM unit 13 forms a RAM disk unit 14 in a part of the memory area.

  The RAM disk unit 14 is an area for storing write information for the flash memory unit 15.

  The flash memory unit 15 is a nonvolatile memory, and for example, an SSD can be applied. The flash memory unit 15 stores the contents of the write information stored in the RAM disk unit 14 under the control of the control unit 11. Further, the flash memory unit 15 stores an OS (Operating System) 16, a call control application 17, and station data 18. The control unit 11 calls the call control application 17 and the station data 18 into the RAM 13 and uses it for loading call control.

  The OS 16 is an operating system that allows the RAM disk unit 14 generated on the RAM unit 13 to be used. For example, Microsoft (registered trademark) Windows (registered trademark) embedded is applicable.

  Subsequently, in the exchange 1, when detecting write information to the area of the flash memory unit 15 storing either or both of the call control application 17 and the station data 18 loaded in the RAM unit 13, based on the detection. A description will be given of a functional unit of a writing process for writing the contents of the writing information of either or both of the call control application 17 and the station data 18 among the writing information of the RAM disk unit 14 to the flash memory unit 15.

  In the following, a case where the updated station data 18 is written in the flash memory unit 15 when the station data 18 is updated will be exemplified. However, the function is basically the same when the call control application 17 is updated. To do.

  FIG. 5 is a block diagram illustrating a configuration of a functional unit that realizes a writing process for writing the contents of the RAM disk unit 14 to the flash memory unit 15.

  As shown in FIG. 5, the functional units for realizing the writing process of the first embodiment include a station data update detecting unit 21, a station data calling control unit 22, a station data restoring unit 23, a CPU usage rate checking unit 24, There is a write controller 25.

  The station data update detection unit 21 detects the write information for the area of the flash memory unit 15 that stores the station data 18 loaded in the RAM unit 13 from the write information stored in the RAM disk unit 14 after the call control is started. Thus, it is detected whether or not the station data 18 has been updated.

  Here, as the update detection method of the station data 18, for example, a method of detecting write information for the file name of the station data 18 stored in the flash memory unit 15 can be applied. The file name is a file name based on the file system when the OS 16 mounts the flash memory unit 15, and is an identifier that identifies an area of the file existing in the file system. In addition, as a way of representing the file name, a case where the file name is simply indicated and a case where the file name is indicated by an absolute path or a relative path including a directory structure in the file system can be applied.

  Further, the station data update detection unit 21 holds the file name of the station data 18 when the station data 18 is loaded in order to detect write information to the area of the flash memory unit 15 that stores the station data 18. deep.

  As an update detection method for the call control application 17, for example, a method for detecting a change in the version of the call control application 18 or the like can be applied in addition to the method for detecting write information for the file name. In this case, the station data update detection unit 21 detects the write information to the area of the flash memory unit 15 in which the call control application 17 is stored, so that the file name of the call control application 17 is loaded when the call control application 17 is loaded. Or keep the version. The version information can be acquired by receiving from the autonomous message output as a result of calling the call control application 17.

  The station data call control unit 22 causes the call control application 17 to call the updated station data 18 when the station data update detection unit 21 detects the update of the station data 18.

  When the call control application 17 calls the updated station data 18, the station data recovery unit 23 recovers the previous station data 18 when the call of the updated station data 18 fails.

  The CPU usage rate confirmation unit 24 confirms whether or not the CPU usage rate exceeds a threshold value when the station data 18 updated by the call control application 17 is normally called.

  The write control unit 25 controls to write the contents stored in the RAM disk unit 14 to the flash memory unit 15.

  Here, a flash memory unit 15 (for example, SSD), which will be described later, is provided with a write restriction (for example, 100,000 times). Therefore, in order to save the latest call control application 17 and the station data 18 correctly and efficiently in the flash memory unit 15, the write control unit 25 of the first embodiment restricts writing to the flash memory unit 15. Do it while hanging.

  The write control unit 25 uses, for example, an enhanced write filter (hereinafter referred to as EWF). This EWF is a function specific to the OS of Microsoft Windows embedding, and is a function that restricts writing to the OS runtime image.

  As a result, the RAM disk unit 14 on the RAM unit 13 can be used as an area for redirecting write information for the protection partition, and the write information stored in the RAM disk unit 14 can be stored in an empty area of the flash memory unit 15. That is, the RAM disk unit 14 which is an area to be redirected is an overlay area in the EWF mechanism, and the disk I / O is redirected to the overlay area and indicates the state of the disk after the write I / O (I / O result). An I / O cache (disk image) is stored. Therefore, this redirection means storing all the write information for the flash memory unit 15 in the RAM disk unit 14 in a cache.

  Therefore, as shown in FIG. 6, it is possible to read data from the flash memory unit (SSD) 15 and write or reread data to the RAM disk unit (overlay) 14. Rereading is performed by reading from the RAM disk unit 14 based on the written information when there is write information in the RAM disk unit 14, and by reading from the flash memory unit 15 when there is no written information. I do.

  Further, since the RAM disk unit 14 is an area formed on the RAM unit 13 which is a volatile memory, the contents stored in the RAM disk unit 14 are discarded upon reboot.

  Furthermore, in the first embodiment, the update of the station data 18 is detected from the write information stored in the RAM disk unit 14, and when it is updated, the update is performed in the flash memory unit 15, and the write to the flash memory unit 15 is performed directly. Thus, the number of times of writing to the flash memory unit 15 can be reduced.

  Furthermore, the system can be protected against a sudden power interruption (for example, removal of PKG, power-off of the exchange 1).

(A-2) Operation of the First Embodiment Next, in the exchange 1 of the first embodiment, the operation of processing for writing the contents of the RAM disk unit 14 to the flash memory unit 15 will be described with reference to the drawings. explain.

  In the following, in FIG. 1, only the telephone terminal 2-1 and the telephone terminal 2-2 are initially connected to the exchange 1, and then a new telephone terminal 2-n is added. A case of updating will be described as an example.

  In the following, the case of updating the station data 18 is exemplified, but the basic processing can be realized by the same processing also in the case of updating the call control application 17.

  However, in step S41 of FIG. 4, the specific processing differs between the case of the station data 18 and the case of the call control application 17, and this will be described in detail later.

  FIG. 3 is a flowchart illustrating processing when the station data is not updated in the exchange 1 according to the first embodiment. FIG. 4 is a flowchart showing a process after updating the station data in the exchange 1 according to the first embodiment.

  First, when the exchange 1 is powered on and activated, the exchange 1 prepares to start call control.

Specifically, in the exchange 1, the OS 16 is activated (step S31), the RAM disk unit 14 is constructed in the area of the RAM unit 13 (step S32), the call control application 17 is activated (step S33), and the station data 18 Is called (step S34), and then call control is started (step S35). Here, the OS 16 has a function of constructing the RAM disk unit 14. By using this, the RAM disk unit 14 can be constructed in the area of the RAM unit 13. After the RAM disk unit 14 is constructed, writing to the flash memory unit 15 for storing OS status information, OS startup log, network access log, call control application startup log, billing information generated by call control, etc. And stored as write information in the RAM disk unit 14.
In step S36, after the exchange 1 starts the call control between the telephone terminal 2-1 and the telephone terminal 2-2, when the station data 18 is not updated and the exchange 1 is shut down (step S37), The contents of the RAM disk unit 14 are written into the flash memory unit 15 (step S38), and the exchange 1 stops after the completion of the writing.

  In step S38, writing to the flash memory unit 15 is executed as part of the shutdown process of the OS 16, and therefore the CPU usage rate is not referred to when writing. In this step S38, all the contents of the RAM disk unit 14 are written into the flash memory unit 15.

  If the station data is not updated in step S36 and the exchange 1 does not shut down (step S37), it is considered that the normal operation is being performed, and write access to the flash memory unit 15 is not performed.

  The operation when it is detected in step S36 that the station data 18 has been updated in a state where the call control is being performed in the exchange 1 will be described with reference to FIG.

  For example, when the exchange 1 is newly accommodated with the telephone terminal 2-n and the station data 18 is updated (step S36), the process proceeds to step S41.

  Here, the updated station data 18 is stored in the RAM disk unit 14 as write information.

  In this example, the addition of one telephone terminal is exemplified. However, in consideration of the updating operation of the large-capacity station data 18 over a long period of time, the update of the station data 18 is detected and then fixed. A time waiting state may be set, and if the station data 18 is not updated during this waiting state, it is considered that the updating operation of the station data 18 has been completed, and the process proceeds to processing step S41.

  In this case, if the station data 18 is updated during the waiting state, it is determined that there is a possibility that the update operation of the station data 18 may continue, and the process proceeds to step S41 until the update operation of the station data 18 is completed. Defer transition to processing.

  In step S41, the call control application 17 confirms that the station data 18 can be called normally. If the call control application 17 has successfully called the station data 18, it is determined that the station data 18 can be written to the flash memory unit 15, and the process proceeds to step S42.

  Here, since the station data 18 to be called is the updated station data 18, the call control application 17 rereads based on the write information in the RAM disk unit 14 and calls the station data 18.

  In addition, as a calling method of the station data 18, for example, a method of calling only updated data (for example, a method of calling only the station data 18 related to the new telephone terminal 2-n), a method of calling the entire station data 18, etc. Can be applied.

  If the call control application 17 cannot normally call the station data 18, the process goes to step S37 to return to the normal operation state, and the contents of the RAM disk unit 14 are not written to the flash memory unit 15 (step S41).

  Here, as described above, the specific method of determining the normality of the call of the station data 18 is different from the specific method of determining the normality of the call of the call control application 17, so this point will be described in detail. To do.

(A) Method for determining normality of calling of station data 18 As a method of determining the normality of calling of station data 18 by the call control application 17, either or both of the following two can be applied. Whether or not to apply one or both of the following two can be realized by setting in the exchange 1 in advance.

  The first method is a method for determining whether or not the call control application 17 has been normally called by a routine return code for calling the station data 18. A return code of 0 indicates that the call was successful, and a return code of 1 indicates that the call was not successful. In this case, the control unit 11 needs to have an interface for receiving a return code from the call control application, and can be realized by making a determination from the return code received via this interface.

  The second method is a method of determining whether or not the call control application 17 has called normally by the output autonomous message as a result of calling the station data 18. When the call control application 17 calls the station data 18, the call control application 17 outputs to the autonomous message whether or not it has been normally called. The case where this autonomous message is output to a log file and the case where it is output to the standard output of the OS can be applied. In this case, the control unit 11 needs to have an interface for accessing the log file or an interface for receiving the standard output, and determines whether the control unit 11 has successfully called from the log contents. Specifically, when the control unit 11 is able to search “#...” Indicating that the type of the autonomous message is a normal message from the contents of the log, the loading of the station data 18 has been successfully output. If it is determined that the station data 18 has been successfully called and “#...” Indicating a normal message cannot be retrieved, it is determined that the loading of the station data 18 has not been successfully performed. Therefore, it can be determined that the calling of the station data 18 is not normal.

  Here, there are four types of autonomous messages, for example, the most urgent message, the urgent message, the error message, and the normal message depending on the importance.

  For example, the most urgent message is given “***” at the beginning of the message, and the call control application cannot detect the failure status including the hardware and software of the device by checking the system operation of the call control application and resume the call processing. Indicates a system down state. The emergency message is prefixed with “**.”, And the system operation check of the call control application has not been performed, but the device is in a failure state, and call processing is forcibly continued in the failure state. This indicates a state where there is a risk of system down. The error message is given with “* ..” at the beginning of the message, and indicates the status of a call processing error or a program error. The normal message is given “#...” At the beginning of the message and indicates the status of station data loading success, line connection success, PKG insertion / removal, PKG control, and the like.

  In the first embodiment, a case where the control unit 11 determines that the call of the station data 18 by the call control application 17 has been normally performed by the first method is shown.

  If the call control application 17 fails to call the station data 18, the station data 18 may be restored to the previous station data 18.

  As a method for restoring the station data 18, for example, a method of recalling the station data 18 from the flash memory unit 15 to the RAM unit 13 again and applying the method of restoring the station data 18 or holding the previous station data 18 in the RAM unit 13, When calling of the new station data 18 fails, a method of switching back to the station data 18 before the update can be applied.

(A) Method of determining normality of call of call control application data 17 This is a method of determining whether or not the call control application 17 has been normally called by the output autonomous message as a result of calling the call control application 17. When the call control application 17 is called, when the call control application 17 detects a failure or abnormality by the call, the call control application 17 outputs an autonomous message. The case where this autonomous message is output to a log file and the case where it is output to the standard output of the OS can be applied. In this case, the control unit 11 needs to have an interface for accessing the log file or an interface for receiving the standard output, and determines whether the control unit 11 has successfully called from the log contents. Specifically, if the exchange 1 performs the call processing without detecting the call failure or abnormality in the exchange 1 and detects the failure or abnormality of the new call control application 17 by update and outputs it as an autonomous message, It can be determined that the call control application 17 is not normal.

  Therefore, the control unit 11 can determine whether there is a failure or abnormality by searching for “***” from the contents of the log and determining that the most urgent message of the autonomous message has not been output.

  In step S42, when the CPU usage rate of the exchange 1 falls below a certain threshold, the contents of the write information stored in the RAM disk unit 14 can be written to the flash memory unit 15 (step S43), and the process proceeds to step S37. To do.

  When the CPU usage rate at the time of executing step S42 is larger than the threshold value, the process proceeds to step S42 again and waits until the CPU usage rate falls below the threshold value.

  Here, as a method for determining the threshold value of the CPU usage rate, it can be appropriately determined according to the environment of the exchange 1. For example, when Windows (registered trademark) is used for the OS, the CPU usage rate is set to 80%. In some cases, it is recommended to operate the computer within the range, and the threshold is set to 70% in view of the grace period from the recommended value. In the writing process from the RAM disk unit 14 to the flash memory unit 15 by another OS, it is possible to determine the threshold value in the same manner, and it is natural that a value other than 70% can be set.

  In step S43, the content of the write information stored in the RAM disk unit 14 can be written to the flash memory unit 15 so that the process proceeds to step S37, and if the exchange 1 operates normally, the content of the RAM disk unit 14 is The data is written in the flash memory unit 15. This step S43 is for writing the contents of the updated writing information of the station data 18 among the writing information stored in the RAM disk unit 14 into the flash memory unit 15.

  In addition, since the writing information for the file name of the station data 18 stored in the flash memory unit 15 is detected by detecting the update of the station data 18 in step S36, it is stored in the RAM disk unit 14 when writing in step S43. Among the write information, the write information related to the updated station data 18 and the other write information can be distinguished.

(A-3) Effects of the First Embodiment As described above, according to the first embodiment, the station data 18 can be stored in the flash memory unit 15 while restricting other than the updated station data 18 from being written. The updated station data 18 can be stored not only in the RAM disk unit 14 but also in the flash memory unit 15 only by the update request.

  As a result, it is possible to simplify the update procedure of the station data 18, prevent the update of the station data 18 from being updated in the flash memory unit 15, and provide a remedy for the loss of the station data 18 in the RAM disk unit 14 due to the failure of the exchange 1. It becomes.

(B) Second Embodiment Next, a second embodiment of the call control device, method and program of the present invention will be described with reference to the drawings.

  In the first embodiment, when the station data (or call control application) is updated, the content of the write information stored in the RAM disk unit is determined after determining whether the station data has been normally called. An embodiment is described in which is written in the flash memory unit.

  However, since the updated station data syntax is normal, there is no guarantee that the call control application will operate correctly in an actual switching system even if the call control application can be successfully called.

  In such a case, if writing to the flash memory unit 15 is allowed, station data that cannot operate correctly is stored in the flash memory unit 15. Further, this extra writing operation consumes the number of times of writing.

  Therefore, in the second embodiment, when the station data is updated, after determining whether or not the call control is successful, the contents of the write information stored in the RAM disk unit are written in the flash memory unit. The form is illustrated.

(B-1) Configuration of Second Embodiment The second embodiment is different from the configuration of the first embodiment in the functional unit that realizes the writing process to the flash memory unit 15. Therefore, in the second embodiment, the configuration of the functional unit of the writing process will be described in detail, and the description of the configuration already described in the first embodiment will be omitted.

  FIG. 7 is a configuration diagram illustrating a configuration of a functional unit of a writing process for performing writing to the flash memory unit 15 of the second embodiment. In FIG. 7, the write processing function unit of the second embodiment includes a station data update detection unit 21, a station data call control unit 22, a station data recovery unit 23, a CPU usage rate confirmation unit 24, a call control confirmation unit 26, a call control unit 26, A control error occurrence status check unit 27, an abnormality notification unit 28, and a write control unit 25 are included.

  The station data update detection unit 21, the station data call control unit 22, the station data restoration unit 23, the CPU usage rate confirmation unit 24, and the write control unit 25 have the same functions as those described in the first embodiment. The description here is omitted.

  After the station data 18 or the call control application 17 is updated, the call control confirmation unit 26 performs call control using the updated station data 18 and determines whether or not the call control is successful. It is to confirm.

  The call control error occurrence status check unit 27 checks the call control error occurrence status from the update of the station data 18 or the call control application 17 to the current time when the call control check unit 26 determines that the call control has failed. Is.

  The abnormality notification unit 28 indicates that the updated station data 18 or the call control application 17 is abnormal to the operator of the exchange 1 when a call control error frequently occurs. The error log to be updated, the updated station data 18 or the writing of the call control application 17 to the flash memory unit 15 is not performed, or the update to the station data 18 or the call control application 17 is discarded or these It notifies the combined information. The error log information can be acquired by receiving from the autonomous message that is output as a result of calling the call control application 17.

(B-2) Operation of Second Embodiment Next, in the exchange 1 of the second embodiment, an operation of a writing process for writing the contents of write information stored in the RAM disk unit 14 to the flash memory unit 15 Will be described with reference to the drawings.

  The second embodiment differs from the first embodiment in the processing after updating the station data 18. Accordingly, the process when the station data 18 is not updated (the process shown in FIG. 3) is the same as that in the first embodiment, and thus the description thereof is omitted here.

  Although the case of updating the station data 18 is illustrated, the case of updating the call control application 17 can be applied in the same manner.

  FIG. 8 is a flowchart illustrating processing after updating the station data according to the second embodiment.

  First, after the call control is started in the exchange 1, when the station data 18 is updated, the process proceeds to step S51.

  In step S51, when the call control application 17 confirms the normality of the updated station data 18 by calling the updated station data 18 (step S51), the call control application 17 reads the updated station data 18 into the updated station data 18. It is used to wait for execution of call control (step S52).

  In step S52, for example, when the exchange 1 receives a call request from the telephone terminal 2-n and the call control is successful, the control unit 11 checks whether the CPU usage rate is equal to or less than a threshold value. If it is below the threshold value (step S55), the contents of the write information stored in the RAM disk unit 14 are written into the flash memory unit 15 (step S56).

  Here, the timing of the call control confirmation in the actual operation of the switching system 10 may be, for example, at the time of confirmation of maintenance work, or may be the timing at which the first operator makes a call after the station data 18 is updated. That is, it is not always necessary to confirm call control in real time.

  On the other hand, in step S52, for example, a call control error that can be solved by the timing of the call such as no answer at the call destination or busy at the call destination, or the difference between the contents of the updated station data 18 and the telephone terminal information, for example May cause a call control error caused by the exchange 1, such as the presence of a problem or a malfunction of the call control application 17 or the OS 16. If such an error relating to call control occurs, it is determined that call control has failed and the process proceeds to step S53.

  In step S53, the occurrence state of the call control error from the update of the station data 18 to the present time is confirmed (step S53).

  Here, as the confirmation of the occurrence status of the call control error, for example, when the number of past error occurrences is small (when it is less than the threshold) or the error occurrence frequency is low (when it is less than the threshold), the most recent call control is performed. The error is regarded as a temporary event, the process proceeds to step S52, and the process is repeated.

  On the other hand, if the number of call control errors in the past is large (when the threshold value is exceeded) or the frequency of error occurrence is high (when the threshold value is exceeded), call control cannot be performed normally due to the latest update of the station data 18. Regardless, the process proceeds to step S54.

  Here, various methods can be applied as the error occurrence status confirmation method in step S53, for example, a method for confirming whether or not a call control error has occurred a predetermined number of times during a predetermined time, A method for confirming whether or not the same type of call control error has occurred a predetermined number of times or a method for confirming whether or not all call control errors in step S52 have occurred a predetermined number of times or more can be applied.

  When the process proceeds from step S53 to step S54, the control unit 11 notifies the operator of the exchange 1 that there is an abnormality in the updated station data 18, an error log associated with the abnormality, and after the update. It may be notified that the station data 18 is not written to the flash memory unit 15 and / or the update to the station data 18 is discarded.

  In step S54, the update of the latest station data 18 is discarded, the station data 18 immediately before the update is rolled back, and the process proceeds to step S37 in FIG. 3 (step S54).

  As described above, since the contents of the write information stored in the RAM disk unit 14 are written in the flash memory unit 15 after the call control is normally performed, the station data 18 which cannot perform the call control normally is flashed. Writing to the memory unit 15 can be prevented.

  Further, even when the call control is not normally performed due to the update of the station data 18, recovery to the station data 18 guaranteed to operate normally in the past and the station data 18 after the recovery are used. Since the switch 1 can be operated and the switch 1 can be returned to the operating state, it is possible to accept a new data update for the station data 18 even after the update of the station data 18 has failed.

(B-3) Effects of the Second Embodiment As described above, in the second embodiment, in addition to the effects obtained by the first embodiment, only the station data 18 that can be actually controlled by the call is stored in the RAM. It is possible to write to the flash memory unit 15 from the contents of the write information in the disk unit 14.

  As a result, only the station data 18 that normally operates as the exchange 1 can be selected and written to the flash memory unit 15.

  Furthermore, according to the second embodiment, it is possible to extend the number of times of writing to the flash memory unit 15 by writing the station data that cannot be used for call control into the flash memory unit 15.

(C) Third Embodiment Next, a third embodiment of the call control device, method and program of the present invention will be described with reference to the drawings.

  The third embodiment will be described by exemplifying an embodiment in which, when station data is updated, the system is restarted or shut down immediately after writing to the flash memory unit 15.

(C-1) Configuration of the Third Embodiment The third embodiment is different from the configuration of the first embodiment in that the configuration of the functional unit of the write process that writes to the flash memory unit 15 is used. Hereinafter, the configuration of the write processing function unit of the third embodiment will be described in detail, and the description of the configuration already described in the first embodiment will be omitted.

  FIG. 9 is a configuration diagram illustrating a configuration of a functional unit of the writing process according to the third embodiment. In FIG. 9, the write function unit of the third embodiment includes a station data update detection unit 21, a station data call control unit 22, a station data restoration unit 23, a CPU usage rate confirmation unit 24, a write control unit 25, and a restart unit. 29.

  The station data update detection unit 21, the station data call control unit 22, the station data restoration unit 23, the CPU usage rate confirmation unit 24, and the write control unit 25 have the same functions as those described in the first embodiment. The description here is omitted.

  The restart unit 29 is for restarting or shutting down the system after immediately writing to the flash memory unit 15 when the station data 18 is updated.

(C-2) Operation of the Third Embodiment Next, in the exchange 1 of the third embodiment, the operation of the writing process for writing the contents of the write information stored in the RAM disk unit 14 to the flash memory unit 15 Will be described with reference to the drawings.

  FIG. 10 is a flowchart illustrating processing in the exchange 1 according to the third embodiment. In FIG. 10, the same processes as those shown in FIG.

  After the OS is activated and the call control is started in the exchange 1 (steps S31 to S35), the call control application 17 monitors the update of the station data 18, and the normal exchange 1 is not updated unless the station data 18 is updated. Operate (step S61).

  If the update process of the station data 18 is detected in step S61, the process proceeds to step S62. In step S62, the contents of the write information stored in the RAM disk unit 14 are written in the flash memory unit 15 (step S62).

  Note that the same processing as in the first embodiment can be applied to the update detection method of the station data 18 and the method of writing the station data 18 to the flash memory unit 15.

  Further, before the transition from step S61 to step S62, the processing described in the first or second embodiment can be applied.

  That is, it is possible to wait until the CPU usage rate monitored by the control unit 11 falls below the threshold (insertion of step S42 in FIG. 4), the call control application 17 calls the updated station data 18, Only when the call is successful, the process proceeds to step S62, and the station data 18 stored in the RAM disk unit 14 can be written to the flash memory unit 15 (insertion of step S41 in FIG. 4). Only when the call control is successful, the process proceeds to step S62, and the station data 18 stored in the RAM disk unit 14 can be written into the flash memory unit 15 (insertion of step S52 in FIG. 8). It is.

  Next, in step S63, the OS 16 shuts down or reboots the exchange 1 after the process of writing the station data 18 stored in the RAM disk unit 14 to the flash memory unit 15 is completed.

  As described above, when the OS 16 is shut down or rebooted, the RAM disk unit 14 is released, and the RAM disk unit 14 is rebuilt at the time of startup, thereby cleaning up the RAM disk unit 14 and loading the new station data 18. 17 can perform call control.

  When the exchange 1 is rebooted, the process proceeds to step S31, where the call control can be provided again.

(C-3) Effects of Third Embodiment As described above, according to the third embodiment, in addition to the effects of the first embodiment, updated station data is written to the flash memory unit 15. Later, when the OS is restarted, the RAM disk unit 14 can be cleaned up again and rebuilt, and call control can be performed with the new station data 18.

(D) Fourth Embodiment A call control apparatus, method and program according to a fourth embodiment of the present invention will be described with reference to the drawings.

  The fourth embodiment exemplifies an embodiment in which, when the contents of write information stored in the RAM disk unit 14 are written to the flash memory unit 15, writing is performed after determining an empty area of the flash memory unit 15.

  FIG. 11A is an explanatory diagram for explaining a storage area of the flash memory unit 15. As shown in FIG. 11, the configuration of the storage area of the flash memory unit 15 includes a storage area of the OS 16 and the like, a storage area of the call control application 17, and a storage area of the station data 18. In addition to this, there is an empty storage area. Exists.

  At this time, when the station data 18 or the call control application 17 is written in the flash memory unit 15, it is necessary to consider the capacity of an empty storage area in order to allow the writing.

  That is, as shown in FIG. 11B, the capacity of the storage area of the station data 18 to be newly written to the flash memory unit 15 is equal to the capacity of the storage area of the current station data 18. It is desirable to be within a range including the capacity of an empty storage area. This also applies to the call control program.

  Therefore, in the fourth embodiment, when the updated station data 18 or the call control application 17 is written in the flash memory unit 15, an empty storage area is also determined.

  The write control unit 25 performs the same processing as in the first to third embodiments, and at the time of writing to the flat seed memory unit 15, the capacity of the storage area of the updated station data 18 and the current station The storage area of the data 18 and the capacity of the free area are compared, and it is determined whether or not to write the updated station data 18 according to the comparison result.

  If the write control unit 25 determines that the write is OK, the updated station data 18 is written to the flash memory unit 18; otherwise, the updated station data 18 is not written. Note that the write control unit 25 performs the same for the call control application 17.

  In the third embodiment, the case where rebooting or the like is performed after writing to the flash memory unit 15 has been described. Even in this case, the updated station data 18 (or the call control application 17) is stored in the flash memory unit 15 as well. Since the reboot or the like is performed after writing in the data, the updated station data 18 and the like can be secured. That is, operation can be continued while storing the latest updated station data (or call control program) in the flash memory.

  As a determination method by the write control unit 25, for example, a determination table shown in FIG. 12 is used.

  In FIG. 12, when the capacity of the storage area of the new call control application 17 exceeds the capacity of the storage area obtained by adding the empty area to the storage area of the current call control program, the write control unit 25 performs the new call control. The application 17 does not write to the flash memory unit 15.

  On the other hand, when the capacity of the storage area of the new call control application 17 is equal to or smaller than the capacity of the storage area obtained by adding the empty area to the storage area of the current call control program, the write control unit 25 sets the new call control application 17. Is written to the flash memory unit 15.

  Similarly, in the case of the station data 18, when the capacity of the storage area of the new station data 18 exceeds the capacity of the storage area obtained by adding the empty area to the storage area of the current station data 18, the write control unit 25 The new station data 18 is not written to the flash memory unit 15.

  On the other hand, when the capacity of the storage area of the new station data 18 is equal to or less than the capacity of the storage area obtained by adding the empty area to the current storage area of the station data 18, the write control unit 25 flushes the new station data 18. Writing to the memory unit 15 is performed.

  When the new station data 18 and the call control application 17 are not written in the flash memory unit 15, they remain as a cache on the RAM disk unit 14. However, when restarted, the new station data 18 and the call control application 17 are not stored in the flash memory unit 15, and therefore the updated station data 18 and the call control application 17 cannot be secured. In other words, the operation is simply continued with the updated latest station data (or call control program).

  By doing so, the contents of the RAM disk unit 14 are appropriately reflected on the flash memory unit 15 when there is free space in the flash memory unit 15, and the lifetime of the flash memory unit 15 with a limited number of write / delete operations Can prolong life.

  For example, when trying to write a 300 MB file to an HDD with 100 MB of free space on an OS such as Windows, a pop-up warning that there is no free space on the HDD when writing 100 MB out of 300 MB and writing 101 MB A window is displayed.

  At this time, the HDD writes 100 MB to 100 MB of free space (displays a warning pop-up window indicating that there is no free space on the HDD to the operator), and then deletes the written 100 MB. Since the same applies to the case where the HDD is an SSD, the life of the SSD having a limited number of writing / deleting operations is reduced.

  However, according to the fourth embodiment, when the capacity of the updated station data 18 or the like exceeds the capacity of the storage area, the station data 18 or the like is not written, so the number of times of writing is reduced. The life of the flash memory unit 15 can be extended.

(E) Fifth Embodiment Next, a fifth embodiment of the call control device, method and program of the present invention will be described with reference to the drawings.

  In the fourth embodiment, the capacity of the free area of the flash memory unit 15 is determined when writing to the flash memory unit 15 is performed.

  In the fifth embodiment, when both the station data 18 and the call control application 17 are updated in the fourth embodiment, the station data 18 and the call control application 17 are compared with the free space in the flash memory unit 15. A description will be given of an embodiment in which it is determined whether or not both can write, and writing is performed.

  In addition to the processing described in the first to fourth embodiments, the write control unit 25 updates both the updated station data 18 and the updated call control application 17 when writing to the flash memory unit 15. The capacity of both the later station data 18 and the call control program is compared with the capacity of each free area, and it is determined whether or not to write the updated station data 18 and the call control program. .

  As a determination method of the write control unit 25, for example, the determination is performed using a determination table shown in FIG.

  For example, in FIG. 3 and FIG. 4, when the station data 18 is updated by the operator, the process goes from step S36 in FIG. 3 to step S43 through steps S41 and S42 in FIG. At this time, in step S43, it is determined whether the capacity of the updated station data 18 exceeds the capacity of the free area of the flash memory unit 15 or less than the capacity, and enters a waiting state for a predetermined time.

  If the operator updates the call control application 17 during this waiting state, the process goes from step S36 in FIG. 3 to steps S43 through steps S41 and S42 in FIG. Also at this time, in step S43, the call control application 17 capacity is determined using the capacity of the free area of the flash memory unit 15.

  In the situation as described above, the write control unit 25 makes a determination using the determination table shown in FIG.

  For example, as shown in FIG. 13, when “the capacity of the new station data 18 is equal to or less than the capacity of the free area” and “the capacity of the new call control application 17 is equal to or less than the capacity of the free area”, the new station data 18 The call control application 17 is written in the flash memory unit 15. That is, the updated latest station data 18 and the call control application 17 are stored in the flash memory unit 15 and the operation is continued.

  On the other hand, when “the capacity of the new station data 18 exceeds the capacity of the free area” and “the capacity of the new call control application 17 exceeds the capacity of the free area”, the new station data 18 and the call control application 17 Is not written to the flash memory unit 15.

By the way, as shown in FIG. 13, for example, when “the capacity of the new call control application 17 exceeds the capacity of the free area” and “the capacity of the new station data 17 is equal to or less than the capacity of the free area”. The new station data 17 can be written because it is less than the free capacity, but here, NG is determined and writing is not performed. vice versa,
This is because there are reasons specific to the exchange. Conventional digital exchanges such as the D60 type automatic exchange are provided with an exchange program and office data, and perform telephone connection processing using these programs. This exchange program has a different station data structure for each program. This is because the signal format and service conditions are determined by the system data of the replacement program, and the hardware configuration, billing conditions, numbering plan, etc. are determined as the station conditions of the station including the replacement program determined by the signal format and service conditions. Because it is station data.

  Since the configuration of station data is different for each replacement program, even if new station data is simply generated and updated, if the station data is not configured in accordance with the signal format and service conditions of the replacement program, this Station data is not available in the replacement program.

  Even if a new exchange program is simply generated and updated, this exchange program cannot be used unless there is station data having a configuration that matches the signal format and service conditions of the new exchange program. In other words, it is necessary to pair the exchange program and the station data that can be used by both.

  Therefore, similarly in the fifth embodiment, for example, the second row from the right in the second row from the right under the condition that “the new call control program is free capacity or more” in the lower row from the uppermost row in FIG. If “new station data is less than the free area” in the two stages from the top, the new station data 18 can be written because it is less than the free capacity, but the new call control application 17 has a free capacity. Thus, after all, only new station data 18 can be written, and there is a possibility that the exchange 1 cannot be operated.

  Therefore, the station data 18 and the call control application 17 are not written here.

  If there is no update by the operator during the waiting time in step S43, the operation is the same as in the fourth embodiment.

  Further, in FIG. 13, when NG is determined, writing is not performed, but only the cache remains on the RAM disk. Since writing is not performed, the updated station data and call control program are not secured when the device is restarted. That is, the operation is simply continued with the updated latest station data and call control program.

(F) Other Embodiments (F-1) In the first to fifth embodiments, when the station data 18 is updated, the contents of the updated station data 18 on the RAM disk unit 14 are stored in the flash memory unit 15. However, the updated operation of the call control application 17 can also be written to the flash memory unit 15 by the same process.

(F-2) The present invention is not limited to an analog telephone but can be applied to an IP telephone or the like.

  The present invention can also be applied to the update of the station data 18 via the console of the exchange 1, the update of the station data 18 via the telephone terminal, and the update of the station data 18 by automatic execution. Further, regarding the console of the exchange 1, it does not matter whether it is local access or remote access.

(F-3) In the first to fifth embodiments, the station data 18 is updated to the flash memory unit 15 (SSD), and at the same time, it becomes important information in the exchange 1, and the RAM disk area is charged every time call processing is performed. The contents of the write information in the information file (data) may also be reflected in the flash memory unit 15 (SSD).

(F-4) In the fifth embodiment, both the call control application 17 and the station data 18 are determined. However, when the main unit stores the subscriber data, the call control application, the station data, and the subscriber It may be determined whether or not three data can be written.

  Here, subscriber data refers to service conditions for subscribers. This is a relationship in which the configuration of the station data is determined when the call control application is determined, and the configuration of the subscriber data is determined when the configuration of the station data is determined.

DESCRIPTION OF SYMBOLS 1 ... Switch, 11 ... Control part, 12 ... Communication part, 13 ... RAM part, 14 ... RAM disk part,
15 ... Flash memory section, 16 ... OS, 17 ... Call control application,
18 ... station data, 2-1 to 2-n ... telephone terminal, 10 ... call system.

Claims (11)

The RAM disk area is generated on the volatile memory, the call control application and the call control information stored in the nonvolatile memory are loaded into the volatile memory to perform call processing, and the write information to the nonvolatile memory Is stored in the RAM disk area,
Update detection processing means for detecting, from the write information in the RAM disk area, the call control application loaded into the volatile memory by call processing and / or the write information to the non-volatile memory area storing the call control information; ,
Write processing means for writing the call control application and / or the call control information area into the nonvolatile memory based on the detection of the update detection processing means. A call control device.   The write processing means confirms the normality of the updated call control application and / or the call control information, and then writes the updated call control application and / or the call control information to the nonvolatile memory. The call control device according to claim 1, wherein the call control device performs the call control.   The write processing means further writes the updated call control application and / or the call control information to the nonvolatile memory when the CPU usage rate of the call control device is equal to or less than a threshold value. The call control device according to claim 2.   The write processing means stores the updated call control application and / or the call control information in the nonvolatile memory after the call control process using the updated call control application and / or the call control information is successful. The call control device according to claim 1, wherein the call control device performs the following writing.   If the call control process using the updated call control application and / or the call control information fails, the write processing means restores the call control application and / or the call control information before the update, and uses this The call control device according to claim 4, wherein the call control device is restarted.   The call control device according to claim 1, wherein the write processing unit restarts immediately after writing the updated call control application and / or the call control information into the nonvolatile memory.   The write processing means compares the updated capacity of the call control application or the call control information with the capacity of the free area on the non-volatile memory before writing to the non-volatile memory. The call control device according to claim 1, wherein writing to the nonvolatile memory is permitted when the capacity is equal to or less than a predetermined capacity.   Before the write processing means writes both the updated call control application and the call control information to the non-volatile memory, the updated capacity of the call control application is compared with the capacity of the free space. And determining whether or not to write to the non-volatile memory by comparing the capacity of the updated call control information with the capacity of a free area. The call control device according to 1.   Even if the capacity of either the updated call control application or the call control information is less than or equal to the capacity of the free area, the updated processing means or the call control application does not store the free area. 9. The call control device according to claim 8, wherein writing to the non-volatile memory is suppressed when the time is exceeded. The RAM disk area is generated on the volatile memory, the call control application and the call control information stored in the nonvolatile memory are loaded into the volatile memory to perform call processing, and the write information to the nonvolatile memory In the call control method of the call control device for storing the data in the RAM disk area,
Update detection processing means detects from the write information in the RAM disk area, the call control application loaded in the volatile memory by call processing and / or the write information to the non-volatile memory area for storing the call control information. Update detection processing step to perform,
Write processing means for writing write information to the call control application and / or call control information area of the RAM disk area based on detection by the update detection processing means to the nonvolatile memory. A call control method comprising: a processing step. The RAM disk area is generated on the volatile memory, the call control application and the call control information stored in the nonvolatile memory are loaded into the volatile memory to perform call processing, and the write information to the nonvolatile memory Is stored in the RAM disk area,
Update detection processing means for detecting, from the write information in the RAM disk area, the call control application loaded into the volatile memory by call processing and / or the write information to the nonvolatile memory area for storing the call control information;
Based on the detection of the update detection processing means, it functions as a write processing means for writing the write information for the call control application and / or the call control information area in the RAM disk area into the nonvolatile memory. A call control program characterized by the above.

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