JP2001236257A - Information storage device, data updating method for subscriber data, and mobile communication system - Google Patents

Abstract

(57) [Summary] [PROBLEMS] In a database synchronization technique of a working HLR and a standby HLR, an operation according to the type of data to be updated, dynamically selecting an update method of a 2-safe method, an immediate update method, and a periodic update method. A response time can be set, a database inconsistency rate at the time of failure of the working HLR can be set according to the update target data, and processing efficiency can be significantly improved when the working HLR is congested. SOLUTION: In a DB synchronization processing unit 10a, a congestion monitoring unit 11a which outputs a congestion degree indicating a congestion state, dynamically selects one type of update method based on at least the congestion degree, and indicates an updated data block. A synchronization control unit 11b for outputting information to be updated, a data block transmission unit 13 for selecting one type of transmission method from a plurality of transmission methods according to the update method and transmitting an updated data block;
It comprises a synchronous response reception processing section 11f.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information storage device, a data updating method for subscriber data, and a mobile communication system suitable for use in duplicating a subscriber database in the field of mobile communication such as a cellular phone.

[0002]

2. Description of the Related Art Cellular networks and PHS (Personal Handy-P)
A mobile communication system such as a hone system (network) has a home location register (information storage device) for holding and managing subscriber data concerning a subscriber in order to perform location registration and authentication in addition to a telephone number of a mobile device. In addition, by providing the current home location register and the standby home location register as a pair and providing a large number of pairs, when one of them fails or cannot be used for maintenance and inspection, the other needs the necessary subscription. Data can be provided.

The database is duplicated so that the contents of the database of the current home location register are the same as the contents of the database of the standby home location register. Switching to standby is performed without any trouble. This duplication of the database is also referred to as database synchronization or tuning.

In the following description, the home location register will be referred to as an HLR (Home Location Register).
gister) or an HLR node, and the current home location register is referred to as a current HLR,
HLR wait for home location register
It may be called. Here, taking location registration as an example,
Explain database duplication. First, when the subscriber's mobile station transmits a location registration request to the mobile switching center, the mobile switching center receives the location registration request and then transmits the data to the working HLR. Next, the current HLR
Updates the subscriber data related to the location registration, and transmits the updated subscriber data to the standby HLR in the form of a subscriber data log. Therefore, the working H
Since the subscriber data transmitted by the LR is copied in the standby HLR, the logs having the same contents are duplicated. Here, the log means a log indicating an updated image of the updated data and necessary information. In the following description, operations refer to procedures to be processed, such as location registration and authentication.

[0005] As a result, the same subscriber data transmitted from the mobile switching center is shared by the working HLR and the standby HLR, and the subscriber data (subscriber database) is synchronized. is there. Furthermore, the working H
Even when the LR fails and the standby HLR becomes active, both can perform location registration processing based on the same contents of subscriber data.

[0006] Specifically, three types of methods for synchronizing the subscriber data are used: a two-safe method (two-phase method), an immediate update method, and a periodic update method. These methods will be described with reference to FIGS. 20 to 22 respectively show MSCs.
(Mobile Switching Center) or VLR
(Visitor Location Register), Act-HLR (Activate-HLR: Active HLR), Standby-HLR (Standby HLR)
And the sequence between the three.

[0007] The operation transmitted from the mobile station (not shown) is exchanged by a mobile exchange via a radio base station (not shown), and then transmitted to the working HLR. An update signal is transmitted and received to synchronize the database with the HLR. Alternatively, the operation transmitted from the mobile exchange is transmitted to the working HLR via the VLR, and an update signal is transmitted / received to / from the standby HLR.

Further, when synchronizing databases using three types of database synchronization methods, it is necessary to compare the communication processing amounts of the processors. One HL
H if the R node has only one processor
There is no need to consider the amount of communication between processors in the LR node. In contrast, one HLR node
When having a plurality of processors, it is necessary to consider the amount of communication processing between processors. For example, when one HLR node includes a plurality of processors (in the case of a multiprocessor configuration), the inter-processor communication processing amount in the HLR node is different from the inter-processor communication processing amount in the HLR node. . That is, the necessary amount of communication processing between processors in the HLR node is different from the amount of communication processing between HLR nodes.

Regarding the 2-safe method The 2-safe method means that the current HL
This is a method in which an operation response is returned after the update of both the R database and the standby HLR database is completed. FIG. 20 is a diagram showing a sequence of the 2-safe method, in which the mobile exchange or the visitor location register transmits an operation request such as location registration to the working HLR. Then, the active HLR receives this operation request and updates the database as indicated by DB update in FIG. Subsequently, the active HLR transmits a synchronization request to the standby HLR, and the standby HLR receives the synchronization request, updates the database, and returns a synchronization response to the active HLR. Further, upon receiving the synchronization response, the working HLR returns an operation response to the mobile exchange or the visitor location register.

Accordingly, the database of the standby HLR has the same contents as the database of the active HLR, so that a failure occurs in the active HLR, and the active HLR and the standby HLR become inactive.
Even if LR is switched, no database inconsistency occurs. Immediate update method The immediate update method means that the current HL
As soon as R completes updating its database,
An operation response is returned to the mobile switching center, logs containing updated data are immediately transmitted one by one to the standby HLR, and the standby HLR is used to update the database.

FIG. 21 is a diagram showing a sequence of the immediate update system. The mobile switch or the visitor location register sends an operation request to the working HLR, the database is updated in the working HLR, and a synchronization request is sent from the working HLR to the standby HLR, and the standby request is sent. The HLR updates the database.
The working HLR transmits a synchronization request and returns an operation response to the mobile switching center or the visitor location register. The current HLR
Since the synchronization response received from the standby HLR is a confirmatory one, it is shown by a dashed line.

According to the instant update method, the amount of communication processing between processors in the HLR node and / or the amount of communication processing between HLR nodes can be smaller than that of the 2-safe method. Further, since the inter-processor communication processing amount is larger than that of the periodic update method described later, the performance of the HLR throughput is intermediate between the two, and the database inconsistency ratio at the time of the active HLR failure also has an intermediate value between the two.

Regarding the periodic update method The periodic update method is a method in which the active HLR and the standby HLR
This method periodically updates the database. FIG.
FIG. 2 is a diagram showing a sequence of the periodic update method.
Two types of signals, a synchronization request, a DB update, and a synchronization response, are shown in a frame denoted by 1 shown in FIG. This allows
Between the working HLR and the standby HLR, an update log of the database of the working HLR is transmitted to the standby HLR,
Since the database contents of the active HLR are updated to the standby HLR, the database is duplicated.

Here, unlike the immediate update method, the current H
When the LR receives an operation request (signals labeled 3 and 4) from the mobile switch or the visitor location register, it does not immediately transmit a synchronization request to the standby HLR. Then, after a predetermined time (synchronization cycle time) has elapsed since the update of the database in the standby HLR, the active HLR again transmits a synchronization request and a database update log to the standby HLR, such as a frame marked “2”. Transmit, thereby causing the standby HLR to update its database.

That is, the active HLR updates its own database only for a predetermined period of time, and after updating a plurality of times, transmits the update log to the standby HLR collectively. In addition, this predetermined time is
When the working HLR receives an operation request from the mobile exchange or the visitor location register, it immediately updates the database and returns an operation response.

Further, in this cycle updating method, the HLR throughput is the highest because the amount of communication processing between processors in the HLR node and / or the amount of communication processing between HLR nodes is the smallest. Further, the operation response time is equivalent to that of the immediate update method. In addition, the immediate update method and the periodic update method each have a standby HLR.
Since the operation response is returned without waiting for the completion of the update of the database, the mobile exchange or the visitor location register can quickly continue the processing.

Conventionally, mobile communication systems
One of the methods is fixedly selected from the methods
Database synchronization was being performed. In addition, Japanese Patent Application 8-
No. 521589 (PCT / SE95 / 01510:
Hereinafter, referred to as Publication 1.)
For example, techniques are disclosed that can be used to provide redundancy for system nodes utilizing the home or visitor location register of a mobile telephone network.

[0018]

However, the 2-safe method requires a long operation response time,
Since the amount of communication processing between processors in the HLR node and / or the amount of communication processing between HLR nodes is the largest, the HL
R throughput is very low. On the other hand, according to the immediate update method and the periodic update method, transmission of a log to the standby HLR is not guaranteed when a failure occurs in the active HLR. Therefore, after the control is switched to the standby HLR, the database of the standby HLR is not updated to the latest content, and there is a possibility that inconsistency may occur between the database content of the active HLR and the database content of the standby HLR. Further, according to the periodic update method, in the worst case, all logs generated within one log transmission period are not transmitted to the standby HLR. Therefore, the periodic update method uses the current HLR.
Database inconsistency rate at the time of failure is highest.

Therefore, these methods are fixedly selected.
When applied, it is not possible to respond flexibly to changes in system conditions. Specifically, the system status change means, first, that the requested (or permitted) operation response time differs depending on the operation type indicating the data type to be updated. Second, the required database inconsistency rate at the time of the active HLR failure differs depending on the data type. Further, if the system is fixed, the current HLR
Cannot be switched even when is in a congested state.

Therefore, for the first point and the second point, it is necessary for the system to perform the database synchronization processing in conformity with the data type having the strictest requirements. Therefore, there is a problem that the response time and the throughput are significantly reduced. Furthermore, there is a problem that the processing efficiency is low because the update method cannot be switched according to the congestion state.

In addition, the above publication 1 does not describe switching of the update method. The present invention has been made in view of such a problem, and a technique for synchronizing a database between an active HLR and a standby HLR includes:
By dynamically selecting and applying an update method such as the 2-safe method, the immediate update method, and the periodic update method, an operation response time can be set according to the type of data to be updated, and the operation response time can be set according to the data to be updated. To set the database inconsistency rate at the time of failure of the current HLR, and
An object of the present invention is to provide an information storage device, a method of updating subscriber data, and a mobile communication system that can significantly improve processing efficiency when the current HLR is congested.

[0022]

For this purpose, the information storage device of the present invention divides updatable subscriber data into a plurality of data blocks corresponding to a processing request signal from the outside,
For each unit of the generated data block, a data management unit that can be updated using one type of update method selected from a plurality of update methods in accordance with a processing request signal, and a data management unit connected to the data management unit. And a database synchronization processing unit capable of dynamically selecting one type of updating method based on a predetermined condition and outputting an updated data block for each type. Claim 1).

Further, the above-mentioned database synchronization processing section comprises:
A congestion monitoring unit that outputs a degree of congestion indicating a congestion state, and is dynamically connected to the congestion monitoring unit and dynamically selects one type of update method based on at least the degree of congestion, and update target information indicating an updated data block A synchronization control unit that outputs
It can be configured to include a data block transmitting unit that is connected to the synchronization control unit, selects one type of transmission method from among a plurality of transmission methods according to the update method, and transmits the updated data block ( Claim 2).

Further, the above-mentioned data block transmitting section includes:
A log management unit that is connected to the synchronization control unit, selects one type of transmission method from among a plurality of transmission methods according to the update method, and outputs the updated data blocks by attaching first time information to each of the data blocks; A log management unit connected to a log management unit, and a log transmission processing unit configured to transmit an updated log using one type of transmission method selected by the log management unit; a synchronization control unit and a log management unit; Can be configured to include a log cycle transmission processing unit that transmits data blocks updated using one type of transmission system selected at a fixed time interval (claim 3).

Further, it may be configured to include a synchronization response reception processing unit for receiving a synchronization response signal, and an operation processing unit connected to the synchronization response reception processing unit and requesting processing of subscriber data. 4). Further, the database synchronization processing unit receives a data update request that specifies one type of update method selected from a plurality of update methods, and updates the data block using the update method specified by the data update request. It can be configured to include an updating unit to be performed.

Further, the updating unit stores the data block to be updated and the first time information included in the data update request in association with each other, and stores the first time information and the first time information attached to the data block to be updated. It can be configured that the update process is updated / discarded by comparing the two time information (claim 6). The above-mentioned database synchronization processing unit performs a two-safe method that returns a response after both the update of one subscriber data and the update of the other subscriber data are completed, and the update of one subscriber data An immediate update method in which completed and updated data blocks are individually transmitted to the other information storage device, and an updated data block in which update of one subscriber data is completed is transmitted to the other subscriber data collectively One type of update method can be selected from at least three of the periodic update methods (claim 7).

[0027] In addition, the method for updating subscriber data of the present invention dynamically updates the plurality of data blocks relating to the renewable subscriber data based on predetermined conditions. A method selection step, an update step of updating a data block using the update method selected in the update method selection step, and a data update request by adding first time information to the data block updated in the update step. A transmitting step of transmitting, and receiving the data update request transmitted in the transmitting step, comparing the first time information with the second time information attached to the data block to be updated, and updating / destroying the update processing. The present invention is characterized by comprising processing steps to be performed.

Further, in addition, the mobile communication system of the present invention is a mobile communication system having at least one pair of information storage devices having renewable subscriber data, wherein one of the information storage devices has an updatable subscription. User data is divided into a plurality of data blocks corresponding to a processing request signal from the outside, and for each unit of the generated data block, one of a plurality of update schemes selected from a plurality of updating schemes in accordance with the processing request signal. A data management unit that can be updated using a type of update method, and a data management unit that is connected to the data management unit and dynamically selects one type of update method based on predetermined conditions, and updates an updated data block for each type. And a database synchronization processing unit capable of outputting to the other information storage device, and the other information storage device transmits one type of update selected from a plurality of update methods transmitted by one information storage device. Is characterized in that it is configured to include an update unit for updating the data block using the updated system receives the data update request that identifies the method data update request specifies (claim 9).

[0029]

Embodiments of the present invention will be described below with reference to the drawings. (A) Description of an embodiment of the present invention FIG. 1 is a diagram showing the principle configuration of a mobile communication system to which the present invention is applied. The mobile communication system 50 shown in FIG. 1 has a home location having updateable subscriber data.
This is a mobile communication system having at least one pair of registers (information storage devices). Hereinafter, a mobile phone network system will be described as an example.

The mobile communication system 50 includes a working HLR 10, a standby HLR 20, a signaling network 51, and a plurality of visitor location registers 52a (VLRs).
1)-Visitor location register 52b (VL
Rn) and a plurality of mobile exchanges 53a.
(MSC1) to 53b (MSCn); a plurality of wireless base stations 54a (BS1) to 54b (BSm);
(MS: Mobile Station).

Here, the mobile unit 55 is, for example, a portable telephone terminal, and the radio base stations 54a to 54b receive radio signals transmitted from the mobile unit 55 and the like, and send them to the mobile exchanges 53a to 53b. Mobile switching equipment 5
Signals from 3a to 53b are converted into radio signals and transmitted to the mobile device 55 and the like. Further, the mobile exchanges 53a to 53b perform an exchange process between the mobile station 55 and the like and the signal network 51, respectively. Further, the signal network 51 is a circuit network, and in the following description, a network of a different operator is also included.

The visitor location register 52a holds the subscriber information obtained from the working HLR. Further, the visitor location register 52b is also a visitor location register 52a.
It has the same function as. The plurality of visitor location registers 52a to 52b are provided throughout the signal network 51, respectively, so that location registration can be performed regardless of the location of the mobile device 55. . In other words, these mobile exchanges 53a-
Each of 53b has a visitor location register 52a and a visitor location register 52b as two types of management databases.

The working HLR 10 and the standby HLR 20 are respectively connected to the home HLR 10 in the mobile communication system 50.
This is a location register. Specifically, each of these manages subscriber information such as billing,
In the following description, the standby HLR is used unless otherwise specified.
It is assumed that twenty subscriber databases follow the subscriber database of the active HLR 10. Further, the working HLR 10 and the standby HLR 20 are provided at a plurality of places in the signal network 51, respectively, and a pair of them is displayed. The hatched portion shown in FIG. 1 is a portion having a function unique to the present invention,
In the following description, portions related to this portion will be described in detail. Also, the DB synchronization processing unit 20 in the standby HLR 20
a, the subscriber data management unit 20b, and the operation processing unit 20c will be described later with reference to FIG.

The working HLR 10 shown in FIG.
Is a DB synchronization processing unit (database synchronization processing unit) 10a
, A subscriber data management unit (data management unit) 10b, and an operation processing unit 10c. The subscriber data management unit 10b divides the updatable subscriber data into a plurality of data blocks corresponding to a processing request signal from the outside, and generates a processing request signal for each unit of the generated data block. Accordingly, updating can be performed using one type of updating method selected from a plurality of updating methods.

Further, the subscriber data management unit 10b
The generation time is held corresponding to each of the updated data blocks. Here, the data block may be referred to as a data element. This function is realized by, for example, a random access memory (RAM). Further, the DB synchronization processing unit 10a
It is connected to the subscriber data management unit 10b, and can dynamically select one type of update method based on a predetermined condition and output an updated data block for each type. This function is realized by, for example, software.

The DB synchronization processing unit 10a is designed to select one type of update method from at least three methods of a 2-safe method, an immediate update method, and a periodic update method. Here, the 2-safe method returns a response after both the update of one subscriber data and the update of the other subscriber data are completed. The immediate update method refers to the one-subscriber method. The data block, which has been updated after the data has been updated, is individually transmitted to the other information storage device. In addition, the periodic update method refers to the data updated after the update of one subscriber data has been completed. Blocks are collectively transmitted to the other subscriber data.

Further, the operation processing unit 10c
It is connected to a synchronous response reception processing unit 10c, which will be described later, and requests processing of subscriber data. Specifically, it notifies the type of a data block to be updated. This function is also realized by software or the like. As a result, when the mobile device 55 moves from the area of the visitor location register 52a where the current position is registered to another area, the mobile device 55 transmits a position registration request to the wireless base station 54b. And the wireless base station 54
The location registration request received at b is transmitted to the visitor location register 52a via the mobile exchange 53a, and the visitor location register 52a
The location registration request is transmitted to the working HLR 10, and the working HL
At R10, the location registration information of the mobile device 55 is changed.

FIG. 2 shows a working HL according to an embodiment of the present invention.
It is a block diagram of R10. The working HLR shown in FIG.
The DB synchronization processing unit 10a includes a congestion monitoring unit 11a, a synchronization control unit 11b, a data block transmission unit 13, a synchronization response reception processing unit 11f, a 2-safe processing unit 12a, and an immediate / periodic update unit 12b. I have. In addition, a subscriber data management unit 10b and an operation processing unit 10c are displayed below the DB synchronization processing unit 10a shown in FIG.

Here, the congestion monitoring unit 11a outputs a congestion degree indicating a congestion situation. This congestion degree is H
In the LR congestion situation, the synchronization of the database can be controlled according to the congestion degree of the working HLR 10 detected by monitoring the congestion degree. FIG. 3 is a diagram illustrating an example of the synchronization control table according to an embodiment of the present invention.
The synchronization control unit table 57 shown in FIG. 3 holds management data used when the synchronization control unit 11b determines the synchronization method. The column indicates the data type as location registration data and authentication data. Are indicated, and the load (CPU load value) is indicated as the congestion degree in the horizontal column. The CPU load value is included in a system call and can be monitored at all times.

Focusing specifically on the location registration data, the location registration data synchronization method is a 2-safe method if the congestion degree is 0% to 10%, and an immediate update method if the congestion degree is 10% to 30%. Further, if it is 30% to 50%, the cycle update method is used, and one cycle of the log transmission (synchronization cycle time) is 2 seconds. In addition, if it is 50% to 70%, one cycle of the log transmission is set to, for example, 5 seconds by the periodic update method, and 70% to 1%.
If it is 00%, one cycle of the log transmission can be set to, for example, 6 seconds in the cycle update method.

On the other hand, for the authentication data, the required degree of synchronization may be low. Therefore, the cycle update method is applied to any degree of congestion, and one cycle of log transmission is one cycle according to each degree of congestion. Seconds, 2 seconds, 3 seconds, 4 seconds, and 5 seconds. Note that these values are merely examples, and various values may be changed in accordance with a design policy. FIG.
The data set in the synchronization control table 57 shown in FIG.
Registered and updated by the network operator. Note that the system behavior may be automatically corrected by some mechanism in the system so that the behavior of the system is optimized.

As described above, the mobile communication system 50
Can dynamically select and apply a database control method during database synchronization. Further, as described above, which synchronization control method is applied is determined according to the congestion degree periodically notified from the congestion monitoring unit 11a, so that the operation response time depends on the type of the target data to be updated. The database inconsistency rate at the time of failure of the working HLR is set according to the target data, and the processing efficiency is significantly improved even when the working HLR is congested.

Next, in FIG. 2, the synchronization control unit 11b
Is connected to the congestion monitoring unit 11a, dynamically selects one type of update method based on the presence / absence of data update related to congestion degree and location registration, update response time, inconsistency ratio, etc. It outputs the update target information indicating the data block thus obtained. Here, a method of selecting one type of update method from the three types is as follows. First, the database update response time, the required database inconsistency rate, and the load on the active HLR 10 are respectively measured, and based on the database update response time, the database inconsistency rate, and the load on the active HLR 10, respectively. Thus, one update method is selected from the three types of update methods, and the update is performed using the selected method.

Specifically, for data whose required database update response time is longer than a predetermined time, database synchronization is performed by the two-safe method. Further, when the measured database inconsistency ratio is smaller than a predetermined value and the database update response time is short, the database synchronization is performed by the immediate update method or the periodic update method.

When the load on the working HLR 10 is small, the log transmission cycle time is shortened in the periodic update method, or the mode is switched to the immediate update method. Further, when the load on the active HLR 10 is large, one cycle time of the log transmission is lengthened within the range of the allowable database mismatch rate. Subsequently, the data block transmission unit 13 is connected to the synchronization control unit 11b, selects one transmission method from a plurality of transmission methods according to the update method, and transmits the updated data block. In addition, it is configured to include a log cycle transmission processing unit 11c, a log management unit 11d, and a log transmission processing unit 11e.

Here, the log cycle transmission processing unit 11c is connected to the synchronization control unit 11b and the log management unit 11d, and stores a data block updated using one type of transmission method selected by the log management unit 11d. It is transmitted at time intervals. That is, the log cycle transmission processing unit 11c is used in the cycle update method. Further, the log management unit 11d is connected to the synchronization control unit 11b, selects one type of transmission method from a plurality of transmission methods according to the update method, and assigns a time stamp (first number) to each of the updated data blocks. 1 time information). As will be described later, the time stamp is attached so that even when the arrival order of the logs is reversed, the order is accurately adjusted.

Further, the log transmission processing unit 11e is connected to the log management unit 11d, and transmits an updated log using one type of transmission method selected by the log management unit 11d. Each function of the log cycle transmission processing unit 11c, the log management unit 11d, and the log transmission processing unit 11e is realized by software.

Thus, when the synchronization control unit 11b determines the two-phase method or the immediate update method, the synchronization control unit 11b instructs the log management unit 11d to use the two-phase method or the immediate update method. Log management unit 1
1d outputs the generated log transmission request to the log transmission processing unit 11e, and the log transmission processing unit 11e transmits the log to the opposing standby HLR 20.

On the other hand, if the synchronization control unit 11b determines that the update method is the cycle update method, the log cycle transmission processing unit 11c inquires of the log management unit 11d whether there is any log to be sent. If a log remains, the log is transmitted to the standby HLR 20. That is, the log is transmitted to the standby HLR 20 by the log cycle transmission processing unit 11c instead of being transmitted from the log transmission processing unit 11e.

The synchronous response receiving section 11f shown in FIG. 2 receives a synchronous response signal, and is used in a two-safe system. That is, the synchronization response reception processing unit 11f receives the synchronization response signal from the standby HLR 20 and outputs a restart signal, and the operation processing unit 10c sends a processing request for a data block to be updated to the subscriber data management unit 10b. Is sent to the DB synchronization processing unit 10a at the subscriber data management unit 10b.

Since the 2-safe processing unit 12a and the immediate / periodic updating unit 12b operate when operating as a standby HLR, they will be described later with reference to FIG. Further, the log management request of the log management unit 11d of the data block transmission unit 13 is received, and after the log management unit 11d inquires of the synchronization control unit 11b about the synchronization control, the updated data log is synchronized. As a request signal, the standby HLR is sent from the log transmission processing unit 11e.
20. When the synchronization response reception processing unit 11f receives the synchronization response signal from the standby HLR 20, a restart signal is output to the operation processing unit 10c, and the operation processing unit 10c has been stopped during the DB synchronization processing. The operation processing is resumed, and the mobile exchanges 53a to 53b or the visitor location
An operation response is transmitted to the registers 52a-52b.

Next, a method for adjusting the format of the subscriber data and the reversal of the log arrival order will be described with reference to FIGS. FIG. 4 is a diagram illustrating an example of a subscriber data format according to an embodiment of the present invention. The subscriber data 56 shown in FIG. 4 has areas of fixed data and updatable data. Here, the fixed data is an area for storing, for example, a subscriber number (subscriber telephone number) and service subscription conditions, and refers to data that is not dynamically updated by an operation. The updatable data is a part that is dynamically updated by an operation. A data block A represents a location registration data block updated by, for example, a location registration operation. Represents an authentication data block that is updated by an operation. Further, each of these data blocks A and B has an area for storing variable data for operation,
It has an area for storing a time stamp indicating the time at which the data was updated.

The active HLR 10 and the standby HLR 2
Each of the 0s divides and holds the managed subscriber data 56. Further, when one type of database update request (operation type) is received, a plurality of data blocks (data blocks A and B) are divided into a plurality of data blocks A and B so as not to be updated simultaneously or together. ing. Furthermore, the data block A is a data element that is updated only when the operation A is executed, and its contents are not updated even when another operation (for example, the operation B) is executed.

FIG. 5 is a diagram showing an example of subscriber data according to one embodiment of the present invention. The subscriber data 56a shown in FIG. 5 has fixed data and updatable data. As specific examples of the updatable data, location registration data and authentication data are shown. This LA1 indicates an area in which location registration has been performed. That is,
Due to the location registration performed by the subscriber A in the location registration area LA1, an update time of 10:30:30 is recorded in the location registration area LA1.

On the other hand, in the subscriber data on the standby HLR 20 side, a time stamp indicating the time at which the data was updated in the active HLR 10 is held in the data block unit. Here, the authentication data block includes, for example, a call history count in the North American standard mobile application part (Mobile Application Part) protocol IS-41-C. This call history count is one of the authentication information,
It is used to measure the number of call occurrences and the number of location registrations. As a result, when the location registration operation is performed, only the location registration data block is updated, and thus the authentication data is not updated at all.

Next, how to deal with the reversal of log arrival by dynamic control of database synchronization control will be described. That is, by dynamically controlling database synchronization,
The order in which logs arrive at the standby HLR 20 may be reversed. For example, assuming that the current congestion degree is 50%, the location registration data is updated by a two-second cycle update method (FIG. 3).
), And database synchronization is performed. Here, at time 11:00:00, the subscriber A enters the location registration area LA2.
(Not shown), and assume that location registration has been performed. At this time, the subscriber data of the active HLR 10 is immediately updated to the location registration area LA2, while the subscriber data of the standby HLR 20 is not updated until a lapse of at most 2 seconds.

In addition, when the subscriber A is moving using a high-speed moving means such as a bullet train, depending on the shape of the location registration area, for example, the two seconds may be such as 11:00:01. It is conceivable that the user may move to another location registration area LA3 (not shown) and perform location registration before the time elapses. In addition, the degree of congestion is abruptly reduced by the time two seconds elapse, and the value of the degree of congestion is reduced by 10%.
In the case described below, the database synchronization by the 2-safe method is performed for the position registration operation from the position registration area LA3. When the two-safe method is used, the log is transmitted immediately, so that in the standby HLR 20, the database synchronization for the location registration area LA3 can be performed earlier than the database synchronization for the location registration area LA2.

In this case, the standby HLR 20
In the position registration data, 11:00:01 is recorded as a time stamp. Thereafter, a database synchronization request (log) relating to the movement to the location registration area LA2 performed earlier arrives. Here, in the log that arrives later, 11: 00: 00: 00 indicating the time when the position registration in the position registration area LA2 was performed is recorded as a time stamp. Since this time information indicates the time at which the data was updated in the current HLR 10, if the subscriber data management unit 20b attempts to update the contents of the database using a log that has arrived thereafter, the location registration data of the subscriber data The time stamps on the blocks make it easy to see that the log arrival order has been reversed. Therefore, there is no need to perform database synchronization for movement to the location registration area LA2.
The database synchronization request is rejected.

Therefore, immediately after the change of the database synchronization control method, there is a very small possibility that the order of the logs arriving at the standby HLR 20 is reversed. It is necessary to keep only the subscriber data updated by. The corresponding operation in such a case is as follows. That is,
The time at which the log was generated by the active HLR 10 is acquired, the time is added to the log, and the log is transmitted to the standby HLR 20.
When the database is updated by the R20 using the log, the time added to the log used at the time of updating is stored in the above-described block unit.

Then, when this log inversion occurs, the log generated before that time is placed in a standby HLR later.
20 and attempts to update the database with the log, but rejects the update process using the log generated before the stored time. Thus, the working HLR
When the log management unit 11d generates a log,
While acquiring the stamp, the subscriber data management unit 10b of the working HLR 10 updates the time stamp attached to the log when the data block is updated by the DB synchronization processing unit 10a. While the standby HLR 20 rejects the process of updating the database using the log generated before the generation time of the time stamp, so that the data updated by the latest log is replaced with the old log. Can not be updated.

Further, since the updatable subscriber data is divided into a plurality of data blocks (data elements), a plurality of data blocks are not updated simultaneously by one type of operation. . Therefore,
The mobile communication system 50 can select and apply a database synchronization control method for each data block generated in this manner. Further, even if a failure occurs in the active HLR 20, database inconsistency is avoided and stable operation is achieved. It becomes possible.

Further, since the database synchronization control can be performed in units of data blocks, the synchronization control of the database can be changed in units of divided data blocks. Therefore, even if the database synchronization control is changed for each data block, the range affected by the control is limited to the data block, so that the reliability of the database is improved.

In a system in which the required database update processing is various, such as an information processing database system, the above-described data division cannot be performed, whereas a communication processing database system is required. In, since the process of referring to the database and the process of updating the database are standard, data division as described above is possible.

On the other hand, the configuration of the standby HLR 20 facing
This is symmetric with the configuration of the working HLR 10. FIG. 6 is a block diagram of the standby HLR 20 according to an embodiment of the present invention. The standby HLR 20 shown in FIG. 6 includes a DB synchronization processing unit (database synchronization processing unit) 20a and a subscriber data management unit (data management Unit) 20b and an operation processing unit 20c. The DB synchronization processing unit 20a includes a congestion monitoring unit 11a, a synchronization control unit 11b, a data block transmission unit 13, a synchronization response reception processing unit 11f, and further includes a 2-safe processing unit 12a and an immediate / periodic update unit 12b. It is configured. Here, components having the same reference numerals as those described above have the same components or the same functions, and thus redundant description will be omitted.

Further, the standby HLR 20 is
Must be able to operate as a new working HLR. Therefore, the standby HLR 20 has a function required to operate as a standby HLR,
It is necessary to have a function equivalent to the active HLR 10. Further, the active HLR 10 needs to operate as a standby HLR after a failure occurs in the active HLR 10 and the standby HLR 20 newly operates as an active HLR.
Therefore, the working HLR 10 needs to have a function necessary to operate as a standby HLR in addition to a function necessary to operate as a current HLR. Therefore, the synchronization control unit 11b, the data block transmission unit 13, and the synchronization response reception processing unit 11f shown in FIG. 6 are each executed only when the standby HLR 20 is operating as the active system. As long as it operates as a standby system, these are not executed.

Further, the 2-safe processing unit 12 a
It receives the updated data element transmitted from the LR (working HLR 10) and outputs a data update request.
The immediate / periodic update unit 12b receives the data update request specifying one type of update method selected from the plurality of update methods, and updates the data block using the update method specified by the data update request. It is what you do.

The immediate / periodic update unit 12b stores the data block to be updated and the time stamp (first time information) of the data update request in association with each other, and updates the data block with the time stamp. The update process is updated / discarded by comparing the time stamp (second time information) attached to the data block to be updated.

Next, the functions of the DB synchronization processing unit 10a of the active HLR 10 and the DB synchronization processing unit 20a of the standby HLR 20 will be described with reference to FIGS. 7 (a) and 7 (b). 7A and 7B having the same reference numerals as those described above have the same or similar functions as those described above. Omitted.

FIG. 7A shows a second embodiment according to the present invention.
FIG. 5 is an explanatory diagram of the operation of the DB synchronization processing units 10a and 20a using the safe method. The log transmission processing unit 1 is included in the DB synchronization processing unit 10a of the active HLR 10 shown in FIG.
1e and a synchronous response reception processing section 11f are displayed.
On the other hand, the DB synchronization processing unit 20a of the standby HLR 20 shown in FIG. 7A displays a 2-safe processing unit 12a and a subscriber data management unit 20b.

As a result, the log transmission processing unit 11 e of the active HLR 10 transmits a log to the standby HLR 20. Then, the 2-safe processing unit 12a of the standby HLR 20
Receives the log, outputs a data update request (update instruction) to the subscriber data management unit 20b, and transmits a synchronization response to the synchronization response reception processing unit 11f of the active HLR 10. is there.

FIG. 7B is an explanatory diagram of the operation of the DB synchronization processing units 10a and 20a using the immediate update method or the periodic update method (immediate / periodic update method) according to one embodiment of the present invention. The DB synchronization processing unit 10a shown in FIG. 7B includes a log transmission processing unit 11e and a log cycle transmission processing unit 11c.
Is displayed. On the other hand, the standby H shown in FIG.
The DB synchronization processing unit 20a of the LR 20 displays an immediate / periodical update unit 12b.

As a result, according to the immediate update method,
The log transmission processing unit 11e of the active HLR 10
Send the log to 20. Then, the standby HLR 20
The instantaneous / periodic update unit 12b receives this log, sends a data update instruction to the subscriber data management unit 20b, and updates the data. Similarly, according to the cycle update method, the log cycle transmission processing unit 11c of the active HLR 10
Transmits a log to the immediate / periodic update unit 12b of the standby HLR 20. Then, the immediate / periodic updating unit 12b of the standby HLR 20 receives this log, sends out a data updating instruction to the subscriber data managing unit 20b, and the data is updated.

In the method for updating subscriber data according to the present invention, first, in order to update a plurality of data blocks relating to renewable subscriber data in the active HLR 10, the updating method is operated based on predetermined conditions. (Update method selection step). Then, the data block is updated using the selected updating method (update step), and a data update request is transmitted with the first time stamp attached to the updated data block (transmission step).

On the other hand, the standby HLR 20 receives the transmitted data update request, compares the first time stamp with the second time stamp attached to the data block to be updated, and updates the update process. / Discard (processing step). As described above, the synchronization control of the database is reliably performed by any of the 2-safe method, the immediate update method, and the periodic update method.

In mobile communication system 50, one information storage device (working HLR 10) divides the renewable subscriber data into a plurality of data blocks corresponding to a processing request signal from the outside, and generates the data block. A subscriber data management unit 10b that can be updated by using one type of update method selected from a plurality of update methods in accordance with a processing request signal for each unit of a data block; 10b, a DB synchronization processing unit 1 that can dynamically select one type of update method based on a predetermined condition and output an updated data block for each type.
0a and the other information storage device (standby HLR2
0) receives a data update request transmitted by the active HLR 10 and specifying one type of update method selected from a plurality of update methods, and updates the data block using the update method specified by the data update request. This is configured to include the immediate / periodical update unit 12b that performs

As described above, in the case where the control is switched to the standby HLR 20 when a failure or the like occurs in the active HLR 10, the DB synchronization processing units 10a and 20a provided in the active HLR 10 and the standby HLR 20, respectively,
The mutual database contents will be kept equal.
Hereinafter, the working HLR of the present embodiment configured as described above will be described.
10 and the operation of the standby HLR 20 are shown in FIGS.
This will be described in detail with reference to flowcharts of FIGS.

FIG. 8 is a flowchart of the congestion monitoring unit 11a. The operation procedure of the congestion monitoring unit 11a is as follows. First, in step B1, the congestion degree of the HLR is measured, and in step B2, the congestion monitoring unit 11a
The measured congestion degree is notified to the synchronization control unit 11b, and the process is temporarily stopped in step B3, and thereafter, the process returns to step B1 again.

Next, the active HLR 1 will be described with reference to FIGS.
The operation procedure of the 0 subscriber data management unit 10b and the standby HLR 20 subscriber data management unit 20b will be described. FIG. 9 is a flowchart of the subscriber data management unit 10b of the working HLR 10. First, in step A1, the subscriber data management unit 10b receives a data processing request from the operation processing unit 10c. Then, in step A2, it is checked whether the request received in step A1 is a reference request or an update request. Here, in the case of a reference request, the subscriber data management unit 10b searches for data to be referred in step A3 through the route attached with the reference request, and in step A4, the searched subscriber data. Is returned (transmitted) to the operation processing unit 10c, and the process ends.

On the other hand, in the case of an update request in step A2, the subscriber data management unit 10b searches for data to be updated in step A5 through the route attached with the update request and specifies the specified data. Update data with values. Further, the subscriber data management unit 10b transmits a log generation request to the log management unit 11d (Step A).
6) Receiving the log generation completion from the log management unit 11d (step A7), and responding the completion of data update to the operation processing unit 10c (step A8).

FIG. 10 is a flowchart of the subscriber data management unit 20b of the standby HLR 20. First, the subscriber data management unit 20b receives a data update processing request from the 2-safe processing unit 12a or the immediate / periodic update unit 12b (step A101). Then, in step A102, the subscriber data management unit 20b compares the first time stamp attached to the log of the request received in step A101 with the second time stamp attached to the update target data. I do. Here, if the first time stamp of the log is newer than the data to be updated, the flow passes through the Yes route and proceeds to step A10 in step A103.
The data is searched and updated using the log attached to the request received in step 1. Subsequently, in step A104, the subscriber data management unit 10b returns a data update completion response.

On the other hand, if the first time stamp of the log is older than the data to be updated, the process proceeds to step A105 via the No route. Here, the database synchronization control is dynamically changing, and the log arrival order is reversed. Therefore, when data is updated using the log, inconsistency in the database occurs between the active HLR 10 and the standby HLR 20. For this reason, the subscriber data management unit 20b rejects the data update, and returns the fact to the 2-safe processing unit 12a or the immediate / periodic update unit 12b.

Further, in the mobile communication system 50, when the DB synchronization processing unit 10a updates the “location registration data” by the location registration from the roaming destination network by the mobile device 55, the database synchronization method is as follows. The 2-safe method is selected. Also, for example, if the congestion degree is 5%, a 2-safe method is used for location registration data, a cycle update method in which one cycle of log transmission is 1 second is used for authentication data, and congestion further progresses. When the degree becomes 25%, the immediate update method is selected for the position registration data as shown in the column corresponding to the congestion degree of “〜30%” in the synchronization control table 57 (see FIG. 3), and for the authentication data, One cycle of log transmission is set to 2 seconds. Thus, the update method is dynamically selected according to the degree of congestion.

FIG. 11 is a flowchart when the log management unit 11d receives a log generation request. The operation procedure of the log management unit 11d is as follows. First, the log management unit 11d
Receives a log generation request from the subscriber data management unit 10b (step E1) and generates a log (step E1).
2). At this time, the log management unit 11d acquires a time stamp indicating the log generation time, and adds a time stamp to the log. Subsequently, in step E3, the log management unit 11d inquires of the synchronization control unit 11b about the synchronization method. Then, the log management unit 11d receives the response from the synchronization control unit 11b, and performs three types of processing according to the synchronization method.

That is, in the case of the two-phase system, the log management unit 11d proceeds to step E4, and transmits a transmission request for the generated log to the log transmission processing unit 11e. Then, in step E5, the completion of the log transmission from the log transmission processing unit 11e is received, and in step E6, a processing suspension request is transmitted to suspend the execution of the operation processing unit 10c that generated the log. And step E
At 7, the log generation completion is transmitted to the subscriber data management unit 10b, and the log generation is completed. The f-operation processing unit 10c is restarted by the synchronization response reception processing unit 11f when receiving the synchronization response from the standby HLR 20 (step F2 in FIG. 17 described later).

On the other hand, in the case of the immediate update method, the log management unit 11d proceeds to step E8, transmits a transmission request to the log transmission processing unit 11e, and receives a log transmission completion from the log transmission processing unit 11e in step E9. Then, the process proceeds to step E7. Further, even in the case of the periodic update method, the log management unit 11d proceeds to step E7, and the log generation is completed. FIG.
Is a flowchart of the transmission log inquiry process of the log management unit 11d. The operation procedure when the log management unit 11d receives the transmission log inquiry request is as follows. First, the log management unit 11d receives a transmission log inquiry request from the log cycle transmission processing unit 11c (step E1).
01), a search is made for a non-transmission log corresponding to the data type included in the inquiry request received in step E101 (step E102). Then, Step E103
In step E104, the log management unit 11d checks the presence / absence of an unsent log based on the search result. If there is a log, the log management unit 11d passes the YES route. A response is sent to the log cycle transmission processing unit 11c, and the process ends. The untransmitted log number responded in step E104 may be a number assigned to each log or a number assigned to a set of fixed logs (log set).

On the other hand, if there is no log in step E103, the process goes through the NO route, and in step E105, the log management unit 11d sends an inquiry response in which there is no log to be transmitted to the log periodic transmission process. Responds to the unit 11c. FIG. 13 is a flowchart of the log transmission processing unit 11e. The operation procedure of the log transmission processing unit 11e is as follows. First, the log transmission processing unit 11e receives a log transmission request from the log management unit 11d (step E20).
1) In step E202, the log transmission processing unit 11e
Checks the synchronization control method specified by the request received in step E201, and if the synchronization control method is the 2-safe method, goes through the route marked as 2-safe and proceeds to step E201.
At 203, the log transmission processing unit 11e waits for the log
The data is transmitted to the 2-safe processing unit 12a of R20, and the process proceeds to step E2.
At 05, the log transmission completion is responded to the log management unit 11d.
The process ends.

On the other hand, in step E202, if the synchronization control method is the immediate update method, the log transmission processing unit 11e follows the route marked as immediate update and proceeds to step E202.
At 204, the log transmission processing unit 11e waits for the log
R20 to the immediate / periodical update unit 12b,
Step 205 is performed. FIG. 14 shows the log management unit 11.
13 is a flowchart of the synchronization control unit 11b when a synchronization control inquiry request is received from d. Synchronization control unit 11b
Receives a synchronization control inquiry request from the log management unit 11d in step C1, and determines in step C2 whether the request is a location registration from a roaming destination. Here, if the request is a location registration from a roaming destination, the synchronization control unit 11b determines YES.
Following the route, at step C5, the log management unit 1 indicates that the selected synchronization control method is the “2 safe method”.
1d.

On the other hand, if the request is not a position registration from the roaming destination in step C2, the synchronous control is performed using the congestion degree notified from the congestion monitoring unit 11a in step C3 through the NO route. Determine the method, step C
At 4, the synchronization control method determined at step C2 is returned to the log management unit 11d. FIG. 15 is a flowchart of the synchronization control unit 11b when a data type inquiry request is received. First, the synchronization control unit 11b receives an inquiry request for a synchronization target data type from the log cycle transmission processing unit 11c (step C101), and uses the congestion degree and the internal data notified from the congestion monitoring unit 11a, The data type to be synchronized in the transmission cycle is determined (step C102), and an inquiry about the data type to be synchronized determined in step C102 is sent to the log cycle transmission processing unit 11.
c (step C103).

FIG. 16 is a flowchart of the 2-safe processing unit 12a, and the operation procedure of the 2-safe processing unit 12a will be described. The 2-safe processing unit 12a of the standby HLR 20 receives the synchronization request from the log transmission processing unit 11e of the active HLR 10 (Step F201), and transmits a data update request to the subscriber data management unit 10b of the standby HLR 20 (Step F201). F202), and further receives a data update processing response (data update completion) from the subscriber data management unit 10b of the standby HLR 20 (step F203), and
A synchronization response is transmitted to the synchronization response reception processing section 11f (step F204).

FIG. 17 is a flowchart of the synchronous response reception processing unit 11f. The operation procedure of the synchronous response reception processing unit 11f when a synchronous response according to the 2-safe method transmitted from the opposing working HLR 10 (or standby HLR 20) is received. Is as follows: First, the synchronization response reception processing unit 11f receives the synchronization response from the 2-safe processing unit 12a (step F1), and temporarily suspends the log set in the synchronization request corresponding to the synchronization response. The processing of the operation processing unit 10c is restarted, and the processing ends (step F2).

FIG. 18 is a flowchart of the log cycle transmission processing section 11c. The operation procedure of the log cycle transmission processing unit 11c is as follows. First, the log cycle transmission processing unit 11c inquires the synchronization control unit 11b about the type of data to be synchronized (step D1). The data type is received (step D2), and an inquiry is made to the log management unit 11d as to whether there is an untransmitted log corresponding to the received synchronization target data type (step D3).

Here, the log cycle transmission processing section 11c receives the response in step D3 from the log management section 11d (step D4), and in step D5, analyzes and transmits the response received in step D4. Check if there is a log. If there is an unsent log, YES
Follow the route, and in step D6, the immediate / periodic updating unit 12
After transmitting the untransmitted log to b, in step D7, the process is suspended until the next log transmission cycle. Also,
When the next log transmission cycle has come, the processing from step D1 is performed. Further, if there is no untransmitted log in step D5, the process in step D7 is temporarily stopped through the NO route.

FIG. 19 is a flow chart of the immediate / periodic updating unit 12b. The procedure for transmitting the log of the immediate / periodic updating unit 12b when the immediate updating method or the periodic updating method is used is as follows. First, the immediate / periodic update unit 1
2b receives the synchronization request from the log transmission processing unit 11e or the log cycle transmission processing unit 11c of the active HLR 10 (step F101), and if there is no unprocessed log in the synchronization request received in step F101, NO Through the route, this process ends.

On the other hand, in step F102, if there is an unprocessed log, the immediate / periodic update unit 12b proceeds to step F103 via the YES route, and the immediate / periodic update unit 12b sets the subscriber data management unit. A request to perform the same data update as that indicated in the log is transmitted to 10b, and in step F104, the response in step F103 is received.

Thus, the present mobile communication system 50
A database control method can be dynamically selected and applied during database synchronization. Further, as described above, which synchronization control method is applied is determined by the degree of congestion, etc., so that an operation response time according to the type of target data to be updated can be set,
The database inconsistency rate at the time of failure of the current HLR 10 can be set according to the target data, and the current HLR 10
When is congested, the processing efficiency can be significantly improved.

As described above, the log management unit 11d acquires a time stamp when generating a log, and stores the time stamp attached to the log in association with the data block to be updated. And the waiting HL
Since R20 rejects a log generated before the generation time of the time stamp, data updated by the latest log can be prevented from being updated by an old log. This also improves the reliability of database duplication.

(B) Others Although the above-mentioned update methods are three methods (2-safe method, immediate update method, and periodic update method), they are not limited to these three methods, and may be changed according to a design policy. For example, a method in which a sequence or the like is improved may be performed. Even in this case, the advantage of the present invention is not impaired at all. In addition, the names of these three systems are not limited to the above names.

Further, the present invention relates to the present HLR 10 and the standby HLR.
Mobile communication system 2 having two HLRs with LR 20
Although the description is made on the premise of 0, the application of the present invention is not necessarily required to be applied to the mobile communication system 20 of such a form. That is, as long as the system is such that the subscriber data is divided and managed into an active system and a standby system, the present invention can be applied to a system having another operation mode.

For example, the database is divided into two types of database A and database B, and one HLR operates as the active system for database A, operates as the standby system for database B, and operates as the standby system for database B. HL
An operation mode in which R operates as a standby system for database A and operates as an active system for database B is possible.

Although the congestion state and the data type are used as the factors for dynamically changing the synchronization control of the database, the same mechanism as that shown in the present invention can be used to change the other states of the system. Accordingly, the database synchronization control may be dynamically changed. For example, a failure type when a failure occurs, a maintenance work type at the time of maintenance work, and the like can be used.

Further, in the present invention, as for the response to the transmission of the database synchronization request (log transmission), only the 2-safe method returns the response. However, in the immediate transmission method and the periodic transmission method, May be returned. In addition, in the present invention, control is performed on the log transmission side, but similar control may be performed on the log reception side. Also,
Similar control may be performed on both the log transmitting side and the log receiving side.

In the present invention, the standby HLR 2
As a method of detecting occurrence of reversal of log arrival time to 0,
The time related to the log acquisition time in the current HLR 10
Although a stamp is used, it is also possible to use a number that is information such as a log sequence number assigned in the order of log generation and that is substituted for a time stamp. When the own network user who is located in the own network performs position registration, a failure occurs in the active HLR 10, and even if the control is switched to the standby HLR 20 without synchronizing the position registration data, the standby HLR 20 side does not operate. The location registration data can be corrected to the latest one. For this reason, the 2-safe method is applied to the location registration from the roaming destination network in order to avoid the correction of the location registration data and to prevent the location registration data from being inconsistent even if a failure occurs in the active HLR 10. Is preferred.

Further, a time stamp is obtained when a log is generated, and when a data block is updated, the time stamp attached to the log is stored in association with the data block to be updated. That time
By rejecting the process of updating the database using logs generated before the time when the stamp was generated,
Regarding the function that prevents the data updated in the latest log from being updated by the old log, it is considered that the possibility of the log inversion is very low. It could be designed.

[0104]

As described in detail above, the home and the home of the present invention
According to the location register, at least one pair of home location registers having subscriber data on the subscriber is provided, and one is a home location register in a mobile communication system in which one operates as a service and the other operates as a standby. A data management unit that divides and holds the subscriber data into a plurality of data elements, and updates each of the plurality of data elements using one type of update method selected from a plurality of update methods; It is connected to the management unit and includes a database synchronization processing unit that dynamically selects one type of update method and outputs an updated data element. Characteristics of data that need to be synchronized with the database, home location and registry Since the optimum database synchronization control according to the congestion state form can be selected run, working HLR
And the amount of synchronization signal between the standby HLR and the
There is an advantage that the rate of occurrence of database inconsistency in the standby home location register after the failure of the working home location register can be minimized (claim 1).

Further, the database synchronization processing section selects a congestion monitoring section that outputs a congestion degree indicating a congestion state, and one type of update method based on at least the congestion degree, and specifies the type of the data element to be updated. A synchronization control unit to be output and a data management unit connected to the data management unit to generate an updated data element by adding a generation time to the data element to be updated, and to select the updated data element from a plurality of transmission methods. A log management unit that selects one type of transmission method, and a log transmission processing unit that transmits updated data elements based on one type of update method. For example, even if the database synchronization method is dynamically controlled, a database inconsistency exists between the working home location register and the standby home location register. It does not live, there is an advantage of improving the reliability of the duplication of a database (claims 2 to 7).

In addition, in the method of updating subscriber data according to the present invention, in order to update a plurality of data blocks relating to updatable subscriber data, the updating method dynamically selects an updating method based on predetermined conditions. A method selection step, an update step of updating a data block using the update method selected in the update method selection step, and a data update request by adding first time information to the data block updated in the update step. A transmitting step of transmitting, and receiving the data update request transmitted in the transmitting step, comparing the first time information with the second time information attached to the data block to be updated, and updating / destroying the update processing. And the processing steps to be performed. Therefore, any of the 2-safe method, the immediate update method, and the periodic update method
There is an advantage that the synchronization control of the database can be reliably performed.

In addition, the mobile communication system according to the present invention is a mobile communication system having at least one pair of information storage devices having renewable subscriber data, and one of the information storage devices has an updatable subscription. User data is divided into a plurality of data blocks corresponding to a processing request signal from the outside, and for each unit of the generated data block, one of a plurality of update schemes selected from a plurality of updating schemes in accordance with the processing request signal. A data management unit that can be updated using a type of update method, and a data management unit that is connected to the data management unit and dynamically selects one type of update method based on predetermined conditions, and updates an updated data block for each type. The other information storage device has a database synchronization processing unit that can output the data to one of the update methods selected from a plurality of update methods transmitted by the one information storage device. It is provided with an update unit that receives a data update request designating a method and updates a data block using the update method designated by the data update request. Therefore, when a failure or the like occurs in the active HLR, the standby state is set. H
When the control is switched to the LR, there is an advantage that the contents of the mutual databases are kept equal (claim 9).

[Brief description of the drawings]

FIG. 1 is a principle configuration diagram of a mobile communication system to which the present invention is applied.

FIG. 2 is a block diagram of a working HLR according to an embodiment of the present invention.

FIG. 3 is a diagram illustrating an example of a synchronization control table according to an embodiment of the present invention.

FIG. 4 is a diagram illustrating an example of a subscriber data format according to an embodiment of the present invention.

FIG. 5 is a diagram illustrating an example of subscriber data according to an embodiment of the present invention.

FIG. 6 is a block diagram of a standby HLR according to an embodiment of the present invention.

FIG. 7A is a diagram illustrating the operation of a DB synchronization processing unit using a two-safe method according to an embodiment of the present invention, and FIG. 7B is an immediate update method or a periodic update method according to an embodiment of the present invention; FIG. 5 is an explanatory diagram of the operation of the DB synchronization processing unit according to the embodiment.

FIG. 8 is a flowchart of a congestion monitoring unit.

FIG. 9 is a flowchart of a subscriber data management unit of the working HLR.

FIG. 10 is a flowchart of a subscriber data management unit of the standby HLR.

FIG. 11 is a flowchart when the log management unit receives a log generation request.

FIG. 12 is a flowchart of a transmission log inquiry process of a log management unit.

FIG. 13 is a flowchart of a log transmission processing unit.

FIG. 14 is a flowchart of the synchronization control unit when a synchronization control inquiry request is received from the log management unit.

FIG. 15 is a flowchart of the synchronization control unit when a data type inquiry request is received.

FIG. 16 is a flowchart of a 2-safe processing unit.

FIG. 17 is a flowchart of a synchronization response reception processing unit.

FIG. 18 is a flowchart of a log cycle transmission processing unit.

FIG. 19 is a flowchart of an immediate / periodic update unit.

FIG. 20 is a diagram showing a sequence of the 2-safe method.

FIG. 21 is a diagram showing a sequence of an immediate update method.

FIG. 22 is a diagram showing a sequence of a periodic update method.

[Explanation of symbols]

 Reference Signs List 10 Active HLR 10a, 20a Database synchronization processing unit 10b, 20b Subscriber data management unit 10c, 20c Operation processing unit 20 Standby HLR 11a Congestion monitoring unit 11b Synchronization control unit 11c Log cycle transmission processing unit 11d Log management processing unit 11e Log transmission processing unit 11f Synchronous response reception processing unit 12a 2-safe processing unit 12b immediate / periodic update unit 13 data block transmission unit 50 mobile communication system 51 signal network 52a, 52b visitor location register 53a, 53b mobile exchange 54a, 54b wireless base station 55 mobile Machine 56, 56a subscriber data 57 synchronization control table

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 5B034 BB02 CC04 DD06 5B082 DE06 GA14 GB02 GB04 5K067 AA41 DD57 EE02 EE16 HH07 HH11 JJ61 JJ70 KK15

Claims (9)

[Claims] 1. An updateable subscriber data is divided into a plurality of data blocks corresponding to a processing request signal from the outside, and for each unit of the generated data block,
A data management unit that can be updated using one type of update method selected from a plurality of update methods in response to the processing request signal; and a data management unit that is connected to the data management unit and performs the predetermined type of update method An information storage device, comprising: a database synchronization processing unit capable of dynamically selecting based on a condition and outputting an updated data block for each type. 2. A congestion monitoring unit that outputs a degree of congestion indicating a congestion situation, wherein the database synchronization processing unit is connected to the congestion monitoring unit, and dynamically updates the one type of updating method based on at least the degree of congestion. And a synchronization control unit for outputting update target information indicating the updated data block, and a transmission method connected to the synchronization control unit and selected from a plurality of transmission methods according to the update method. 2. The information storage device according to claim 1, further comprising a data block transmitting unit that selects the data block and transmits the updated data block. 3. The data block transmission section is connected to the synchronization control section, selects one type of transmission scheme from a plurality of transmission schemes corresponding to the update scheme, and selects each of the updated data blocks. And a log management unit connected to the log management unit and transmitting the updated log using the one type of transmission method selected by the log management unit. A processing unit, a log periodic transmission connected to the synchronization control unit and the log management unit, and transmitting the updated data block at regular time intervals using the one type of transmission method selected by the log management unit. 3. The information storage device according to claim 2, wherein the information storage device is configured to include a processing unit. 4. A synchronous response receiving unit for receiving a synchronous response signal, and an operation processing unit connected to the synchronous response receiving unit for requesting processing of the subscriber data. The information storage device according to claim 3, wherein 5. The database synchronization processing unit receives a data update request specifying one type of update method selected from a plurality of update methods, and uses the update method specified by the data update request to execute the data update request. 3. The information storage device according to claim 2, further comprising an updating unit that updates the block. 6. The updating unit stores the data block to be updated and the first time information included in the data update request in association with each other, and attaches the first time information and the data block to be updated. 6. The information storage device according to claim 5, wherein the information storage device is configured to compare / update the second time information and perform update / discard of the update process. 7. A two-safe method in which the database synchronization processing unit returns a response after both the updating of one subscriber data and the updating of the other subscriber data are completed, and the one subscriber data And the updated data block is individually transmitted to the other information storage device when the update of the data is completed, and the updated data block is completed by updating the one subscriber data. At least three of the other subscriber data and the period update method to be transmitted.
2. The information storage device according to claim 1, wherein the one type of update method is selected from the methods. 8. An updating method selecting step of dynamically selecting an updating method based on predetermined conditions in order to update a plurality of data blocks relating to updatable subscriber data, and selecting the updating method in the updating method selecting step. An updating step of updating the data block using the updated updating method; and a first updating step for the data block updated in the updating step.
A transmitting step of transmitting a data update request with time information; receiving the data update request transmitted in the transmitting step, and setting the first time information and a second time attached to a data block to be updated; A data updating method for subscriber data, characterized by comprising a processing step of updating / destroying an updating process by comparing information with information. 9. A mobile communication system comprising at least one pair of information storage devices having renewable subscriber data, wherein one of the information storage devices converts the renewable subscriber data to an external processing request signal. It is possible to divide the generated data block into a plurality of corresponding data blocks and update the generated data block by using one type of update method selected from a plurality of update methods in accordance with the processing request signal. A data management unit, a database synchronization processing unit connected to the data management unit, capable of dynamically selecting the one type of update method based on predetermined conditions, and outputting an updated data block for each type; The other information storage device transmits a data update request transmitted from the one information storage device and designating one type of update method selected from a plurality of update methods. Shin and using the update method in which the data update request is specified is characterized in that is configured to include an update unit for updating of the data block, the mobile communication system.