JP6389142B2 - Call connection system and subscriber information transmission method - Google Patents

Description

  The present invention relates to a technique for transmitting subscriber information.

  There is a system in which subscriber information is held by a plurality of servers, one of which is a voice call service system. This system includes a subscriber DB server that centrally manages subscriber information, and a call control server that provides voice services to terminals using the subscriber information.

  The flow of the operation is shown in FIGS. When the call control server 3 receives a connection request from the terminal 5, if there is no subscriber information of the subscriber, the subscriber control server 3 requests the subscriber DB server 1 for the subscriber information, downloads it, and starts the service. To do. When the downloading of the subscriber information fails, the call control server 3 returns NG to the terminal 5 and acquires the subscriber information by a reconnection request from the terminal 5.

  When providing subscriber information from the subscriber DB server to the call control server, the amount of data that can be transmitted to the call control server at one time is defined by DIAMETER-IF between the subscriber DB server and the call control server. 16MB is the upper limit data size. For details, see Non-Patent Document 1. The maximum transmission data amount of one signal in DIAMETER-IF is defined as 16 MB at maximum.

“Diameter Base Protocol (especially“ 3.Diameter Header ”)”, Network Working Group, [online], [Search April 7, 2015], <URL: http://www.ietf.org/rfc/rfc3588 .txt>

  Until now, the amount of data exceeding 16 MB has never been exchanged. However, when a large-scale user is introduced into the above system, since a data amount exceeding 16 MB occurs, a new method is required. In other words, since the maximum transmission data amount of one signal in DIAMETER-IF is defined by RFC, 3GPP, etc., there is a problem that subscriber information exceeding that cannot be downloaded.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to make it possible to acquire subscriber information exceeding a specified maximum transmission data amount.

  In order to solve the above problems, a call connection system according to claim 1 is a call connection system for connecting a call between subscriber terminals using a subscriber information storage device for storing subscriber information and the subscriber information. The subscriber information storage device transmits the maximum transmission data amount to the call connection device by the maximum transmission data amount when the subscriber information exceeds a prescribed maximum transmission data amount. A second transmission unit configured to repeatedly transmit the request for the subscriber information to the subscriber information storage unit until acquisition of all data constituting the subscriber information is completed. Having a means.

  According to the present invention, when the subscriber information exceeds the prescribed maximum transmission data amount, the subscriber information storage device transmits the maximum transmission data amount to the call connection device, and the call connection device transmits the subscriber information. Since the request for subscriber information is repeatedly transmitted to the subscriber information storage device until acquisition of all the data to be configured is completed, subscriber information exceeding the specified maximum transmission data amount can be acquired by the call connection device.

  The call connection system according to claim 2 is the call connection system according to claim 1, wherein the first transmission means further includes identification information indicating whether or not there is untransmitted data in the subscriber information. The gist is to send.

  According to the present invention, the subscriber information storage device further transmits identification information indicating whether there is untransmitted data in the subscriber information, so that the acquisition of the subscriber information is completed in the call connection device. I can grasp.

  The call connection system according to claim 3 is the call connection system according to claim 1 or 2, wherein the first transmission means further includes sequence information indicating a transmission order of the subscriber information of the maximum transmission data amount. The gist is to send.

  According to the present invention, since the subscriber information storage device further transmits sequence information indicating the transmission order of the subscriber information with the maximum transmission data amount, the call connection device can manage the acquisition status of the subscriber information, and Even if the acquisition of the person information fails, the time until the acquisition is completed can be shortened, and the service provision time to the terminal can be shortened.

  The call connection system according to claim 4 is the call connection system according to claim 1, wherein the first transmission means includes identification information indicating whether or not there is untransmitted data in the subscriber information, and Alternatively, the gist is to set sequence information indicating a transmission order of the subscriber information of the maximum transmission data amount in a body portion of a transmission signal.

  According to the present invention, the subscriber information storage device includes identification information indicating whether there is untransmitted data in the subscriber information and / or sequence information indicating the transmission order of the subscriber information having the maximum transmission data amount. Is set in the body part of the transmission signal, subscriber information exceeding the maximum transmission data amount can be acquired while satisfying the upper limit of the transmission data amount that can be transmitted.

  The subscriber information transmission method according to claim 5 is a subscriber information storage device that stores subscriber information and a call connection device that connects a call between subscriber terminals using the subscriber information. In the subscriber information transmission method, the subscriber information storage device has a first transmission step of transmitting to the call connection device by the maximum transmission data amount when the subscriber information exceeds a prescribed maximum transmission data amount. The call connection device has a second transmission step of repeatedly transmitting the request for the subscriber information to the subscriber information storage device until acquisition of all data constituting the subscriber information is completed. Is the gist.

  According to the present invention, it is possible to acquire subscriber information that exceeds a prescribed maximum transmission data amount.

It is a figure which shows the whole structure of a voice call service system. It is a figure which shows the transmission / reception processing flow of subscriber information. It is a figure which shows the transmission / reception processing flow (with an error) of subscriber information. It is a figure which shows the example of a setting of a subsequent data flag and a division number. It is a figure which shows the flow until service provision. It is a figure which shows the processing flow on the system until service provision.

  The present invention proposes a signal transmission system when subscriber information exceeds the maximum transmission data amount of DIAMETER-IF. Specifically, the maximum amount of data set in the subscriber information download response is kept at the maximum transmission data amount, and the subscriber information is transmitted to the call control server by the maximum transmission data amount. We propose a signal division transmission method that repeats until acquisition is completed. Hereinafter, an embodiment for carrying out the present invention will be described with reference to the drawings.

  FIG. 1 is a diagram showing an overall configuration of a voice call service system 100 according to the present embodiment. The voice call service system 100 includes a subscriber DB server 1 and a call control server 3 as in the prior art. The subscriber DB server 1 and the call control server 3 can communicate with each other via the DIAMETER-IF.

  The subscriber DB server 1 is a server that manages the original subscriber information necessary for the subscriber to receive services. In the present embodiment, a storage unit 11 that stores the original subscriber information, a receiving unit 12 that receives a download request for subscriber information, and a transmission unit 13 that transmits a download response for subscriber information are provided. Composed. A download request and a download response, and a subsequent data flag and a division number, which will be described later, are transmitted and received by a DIAMETER signal via the DIAMETER-IF.

  Here, the function of the transmission unit 13 will be described in detail. In the present embodiment, when the subscriber information subject to download request exceeds the maximum transmission data amount of DIAMETER-IF, the subscriber information is transmitted by dividing the maximum transmission data amount. That is, a download response signal necessary for transmitting one piece of subscriber information is divided and transmitted. Thereby, subscriber information exceeding the maximum transmission data amount can be acquired while satisfying the upper limit of the transmission data amount that can be transmitted by the DIAMETER-IF.

  When such a signal division transmission method is adopted, it is difficult for the call control server 3 to grasp which download response has received all the subscriber information requested. Therefore, the transmission unit 13 transmits a subsequent data flag (identification information indicating whether there is untransmitted data in the subscriber information) for determining whether or not the download request from the call control server 3 is necessary. When there is a remaining in the subscriber information, a “present” flag is transmitted, and when there is no remaining, a “none” flag is transmitted. If the subsequent data flag is “none”, the call control server 3 can grasp that the acquisition of the subscriber information is completed.

  If the signal division transmission method described above is adopted, the subscriber information is divided and transmitted. Therefore, the number of downloads necessary to acquire one subscriber information and the number of reflections to the memory increase, and the possibility of failure in acquiring subscriber information increases. Therefore, the transmission unit 13 transmits the division number (sequence information indicating the transmission order of the subscriber information of the maximum transmission data amount). Thereby, the call control server 3 can manage the download status of the subscriber information using the division number. Therefore, for example, when downloading fails in the middle, by restarting the download request from the subscriber information of the failed division number, it is possible to shorten the time until acquisition of subscriber information is completed, and to reduce the service provision time to the terminal 5 Can be shortened.

  Next, the call control server 3 will be described. When receiving a connection request from the terminal 5, the call control server 3 is a server that performs connection processing using the subscriber information of the subscriber. In the present embodiment, a storage unit 31 that stores subscriber information (replicated) downloaded from the subscriber DB server 1, a reception unit 32 that receives a connection request from the terminal 5, and a subscriber information download request are transmitted. A transmission unit 33 and a reception unit 34 for receiving a subscriber information download response are provided.

  Here, the functions of the reception unit 34 and the transmission unit 33 will be described in detail. In the present embodiment, the receiving unit 34 stores the subscriber information in the storage unit 31 every time the subscriber information is downloaded from the subscriber DB server 1. Further, the subsequent data flag transmitted from the subscriber DB server 1 is referred to. If “Yes”, the transmitter 33 is requested to retransmit the download request for the subscriber information in order to obtain the remaining subscriber information. To do. On the other hand, in the case of “none”, it is determined that the acquisition of the subscriber information from the subscriber DB server 1 is completed, and the retransmission is not requested. The transmission unit 33 transmits a subscriber information download request based on the retransmission request from the reception unit 34. At that time, the division number transmitted from the subscriber DB server 1 is incremented by 1, and the next division number is also transmitted. In addition, when the subscriber information acquisition fails, the subscriber information download request is referred to by including the division number obtained by incrementing the largest division number by referring to the division number of the subscriber information that has been successfully acquired. To do.

  The above is the function of the subscriber DB server 1 and the call control server 3. It should be noted that the above-described functions and their sharing are only examples. For example, in the subscriber DB server 1, some functions of the transmission unit 13 may be realized by other function units (for example, a data processing unit), or all functions of the reception unit 12 and the transmission unit 13. May be realized by one function unit (for example, a transmission / reception unit). Moreover, you may provide functional parts other than the functional part mentioned above. For example, in the case of the call control server 3, a call processing unit for processing a call connection can be considered.

  Next, a subscriber information transmission method performed in the above-described voice call service system 100 will be described with reference to FIG. However, the data amount of the subscriber information here is 48 MB (= 16 MB × 3).

  First, when receiving a connection request from the terminal 5, the call control server 3 determines whether or not the subscriber information of the subscriber is stored in the storage unit 31, and if not, the original subscriber information is stored. A request for downloading the subscriber information of the subscriber is transmitted to the subscriber DB server 1 having (step S101).

  Next, the subscriber DB server 1 acquires the subscriber information received from the call control server 3 from the storage unit 11, and whether the data amount exceeds the maximum transmission data amount (= 16 MB) of DIAMETER-IF. If it exceeds, the subscriber information for 16 MB is returned from the head, and the division number # 1 and the subsequent data flag “present” are transmitted together (step S102).

  Next, the call control server 3 stores the subscriber information downloaded from the subscriber DB server 1 in the storage unit 31 in association with the division number # 1, and since the subsequent data flag is “present”, the division number # 1 Is incremented by 1, and a download request for the subscriber information of division number # 2 is transmitted (step S103).

  Next, when the subscriber DB server 1 receives the download request for the subscriber information of the division number # 2, the subscriber DB server 1 returns the subscriber information for the next 16 MB together with the division number # 2 and the subsequent data flag “present” (step). S104).

  Next, the call control server 3 adds the subscriber information subsequently downloaded from the subscriber DB server 1 to the storage unit 31 in association with the division number # 2, and the subsequent data flag is “present”. # 2 is incremented by 1, and a download request for subscriber information of division number # 3 is transmitted (step S105).

  Next, when the subscriber DB server 1 receives the download request for the subscriber information of the division number # 3, the subscriber DB server 1 returns the last 16 MB of subscriber information together with the division number # 3 and the subsequent data flag “none” (step). S106).

  After that, the call control server 3 adds the subscriber information continuously downloaded from the subscriber DB server 1 to the storage unit 31 in association with the division number # 3 and completes the acquisition of the subscriber information because the subsequent data flag is “none”. The connection request OK is returned to the terminal 5 (step S107).

  Thus, when the subscriber information exceeds the maximum transmission data amount of DIAMETER-IF, the subscriber DB server 1 keeps the maximum data amount set in the subscriber information download response as the maximum transmission data amount, The subscriber information is repeatedly transmitted to the call control server 3 for each maximum transmission data amount until the subscriber information acquisition is completed. Therefore, subscriber information exceeding the maximum transmission data amount can be acquired while satisfying the upper limit of the transmission data amount that can be transmitted by the DIAMETER-IF.

  Further, since the subscriber DB server 1 transmits the subsequent data flag together with the subscriber information, the call control server 3 can surely and quickly grasp whether or not there is any remaining subscriber information.

  Further, since the subscriber DB server 1 transmits the division number together with the subscriber information, it is possible to manage the download status of the subscriber information using the division number. As a result, for example, when download fails in the middle, by restarting the download request from the subscriber information of the failed division number, it is possible to shorten the time until acquisition of subscriber information is completed, and to reduce the service provision time to the terminal 5 Can be shortened. In order to fully understand this operation and effect, the operation when downloading fails during the process will be described.

  FIG. 3 shows a case where the process of storing the subscriber information of the division number # 2 in the storage unit 31 is based on the process flow described with reference to FIG. Steps S201 to S204 are the same as the processes in steps S101 to S104.

  After step S204, the call control server 3 tries to add the subscriber information of the division number # 2 downloaded from the subscriber DB server 1 to the storage unit 31. If the process fails for some reason, the call control server 3 NG of the connection request is returned to and the fact that the acquisition of the subscriber information of the division number # 1 is successful is stored (step S205).

  Thereafter, when receiving a reconnection request from the terminal 5, the call control server 3 re-determines whether or not the subscriber information of the subscriber is stored in the storage unit 31, and determines the subscriber information of the division number # 1. Since the acquisition has succeeded, the division number # 1 is incremented by 1, and a download request for the subscriber information of the division number # 2 is transmitted (step S206).

  That is, since the subscriber information of the division number # 1 that has been successfully acquired is not re-acquired, it is possible to shorten the time until acquisition of the subscriber information is completed, and to shorten the service provision time to the terminal 5. . Note that steps S207 to S210 shown in FIG. 3 are the same as the processes of steps S104 to S107.

  Finally, the setting location of the subsequent data flag and the division number will be described. In this embodiment, they are set in the body part of the DIAMETER signal (the data part in which the data itself is set, not the header part). As a result, the DIAMETER standard defined by RFC, 3GPP, etc. can be satisfied, and the 16 MB signal division transmission system can be supported. An example of setting the subsequent data flag and the division number in the body part is shown in FIG.

  As described above, according to the present embodiment, when the subscriber information exceeds the specified maximum transmission data amount, the subscriber DB server 1 transmits the maximum transmission data amount to the call control server 3 by each amount. Since the subscriber information request is repeatedly transmitted to the subscriber DB server 1 until acquisition of all the data constituting the subscriber information is completed, the subscriber exceeding the prescribed maximum transmission data amount in the call control server 3 Information can be acquired.

  Further, according to the present embodiment, the subscriber DB server 1 further transmits a subsequent data flag indicating whether or not there is untransmitted data in the subscriber information. You can know that the acquisition is complete.

  Further, according to the present embodiment, the subscriber DB server 1 further transmits a division number indicating the transmission order of the subscriber information having the maximum transmission data amount, so that the call control server 3 determines the acquisition status of the subscriber information. Even if the subscriber information acquisition fails, the time until the acquisition is completed can be shortened, and the service provision time to the terminal can be shortened.

  Further, according to the present embodiment, the subscriber DB server 1 transmits the subsequent data flag indicating whether or not there is untransmitted data in the subscriber information and / or the subscriber information of the maximum transmission data amount. Since the division number indicating the order is set in the body part of the DIAMETER signal, subscriber information exceeding the maximum transmission data amount can be acquired while satisfying the upper limit of the transmission data amount that can be transmitted.

  Finally, the subscriber DB server 1 and the call control server 3 described in the present embodiment can be realized by a computer having a calculation function such as a CPU and a storage function such as a memory. It is also possible to create a program for causing a computer to function as the subscriber DB server 1 or the call control server 3 and a storage medium for the program.

1. Subscriber DB server (subscriber information storage device)
DESCRIPTION OF SYMBOLS 11 ... Memory | storage part 12 ... Reception part 13 ... Transmission part (1st transmission means)
3. Call control server (call connection device)
31 ... Storage unit 32 ... Reception unit 33 ... Transmission unit (second transmission means)
34 ... Receiver 5 ... Terminal (subscriber terminal)
100 ... Voice call service system (call connection system)
S101-S107, S201-S210 ... step

Claims (5)

In a call connection system comprising: a subscriber information storage device for storing subscriber information; and a call connection device for connecting a call between subscriber terminals using the subscriber information.
The subscriber information storage device includes:
When the subscriber information exceeds a prescribed maximum transmission data amount, the subscriber information has a first transmission means for transmitting the maximum transmission data amount to the call connection device,
The call connection device includes:
Second transmission means for repeatedly transmitting a request for the subscriber information to the subscriber information storage device until acquisition of all data constituting the subscriber information is completed ;
The second transmission means includes
A call for starting subscriber information from data for which acquisition failed based on a reconnection request from a subscriber terminal when acquisition of all data constituting the subscriber information fails in the middle. Connection system. The first transmission means includes
The call connection system according to claim 1, further comprising transmitting identification information indicating whether or not there is untransmitted data in the subscriber information. The first transmission means includes
The call connection system according to claim 1 or 2, further comprising transmitting sequence information indicating a transmission order of the subscriber information of the maximum transmission data amount. The first transmission means includes
Setting identification information indicating whether or not there is untransmitted data in the subscriber information and / or sequence information indicating the transmission order of the subscriber information of the maximum transmission data amount in the body portion of the transmission signal The call connection system according to claim 1. In a subscriber information transmission method performed by a subscriber information storage device for storing subscriber information and a call connection device for connecting a call between subscriber terminals using the subscriber information,
The subscriber information storage device includes:
When the subscriber information exceeds a prescribed maximum transmission data amount, the first transmission step of transmitting to the call connection device by the maximum transmission data amount,
The call connection device includes:
A second transmission step of repeatedly transmitting the request for the subscriber information to the subscriber information storage device until acquisition of all the data constituting the subscriber information is completed ,
In the second transmission step,
The subscriber information request is started from the data that failed to be acquired based on the reconnection request from the subscriber terminal when acquisition of all the data constituting the subscriber information fails in the middle. Person information transmission method.

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