CN1204762C - Redundant disaster method for realizing adscription of location registers throuth mobile communication operating system - Google Patents

Abstract

The present invention discloses a redundant disaster method for realizing a home location register through a mobile communication operating system. In the present invention, corresponding to a plurality of active home location registers which requires to carry out data backup and business backup, a home location register of a disaster tolerance center is established in a centralization mode; an operating system periodically and synchronously transmits operating instructions which modify subscriber information to the home location register of a disaster tolerance center by using respective active home location register. The present invention has the advantages of strong operability, small effect on the existing system, low demands to transmission line, low cost, and better compatibility and expandability.

Description

Home Location Register Redundancy Method Through Mobile Communication Operation System

technical field

The invention relates to a mobile communication system, more specifically to a method for realizing home location register redundancy through a mobile communication operating system.

Background technique

With the rapid increase of mobile users and the continuous development of communication technology, the stand-alone capacity of the Home Location Register (HLR) is often hundreds of thousands or even more. Since the home location register stores the subscription information of mobile users, once the home location register is shut down for a long time due to unforeseen reasons such as power outages, fires, earthquakes, lightning strikes, etc., the mobile services of all subscribers will be interrupted. Remote redundancy of location registers has become a top priority.

The redundancy of the home location register includes two aspects. One is the data redundancy that is simply used to back up user data, and the other is the business redundancy based on this. That is, when the primary home location register fails, the redundancy The home location register can take over its business, ensuring the uninterrupted calling business to the greatest extent.

According to whether the backed-up HLR and the redundant disaster center HLR belong to the same manufacturer, redundancy can be further divided into compatibility redundancy and non-compatibility redundancy. Due to the fact that there are many suppliers of HLR equipment in China, and different HLRs have different storage formats and processing methods for user data, the compatibility scheme is more widely used.

At present, all equipment suppliers have basically realized the local data redundancy of the home location register, that is, the regular backup of user data through tape drives or disks, but business redundancy has not been widely used.

There are two types of remote data redundancy in terms of topology, one is the 1+1 redundancy solution, and the other is the N+1 solution. At present, the relatively clear schemes include the 1+1 extended mobile application part (MAP) protocol signaling scheme and the N+1 synchronous subscription data scheme, which are introduced respectively as follows:

1+1 extended mobile application partial protocol signaling solution (see Figure 1, STP in Figure 1 is the signaling transfer point): generally, it is mutual backup between two home location registers (HLR), and its core content is through Extended SS7 to carry various operating instructions to achieve data consistency. Firstly, each HLR not only saves the home user information, but also keeps the user information of another HLR, and these user information are respectively identified by "primary/secondary" identification bits inside the HLR. While each HLR receives and processes the standard signaling (operation instruction) sent to itself according to the normal process, it also notifies the user data changes caused by this signaling (operation instruction) through the extended mobile application part protocol message For the corresponding backup HLR, the backup HLR performs data synchronous update, thereby realizing data synchronization. The extended mobile application part protocol message includes modify, add and delete operations.

N+1 synchronous subscription data scheme: One HLR performs redundancy on multiple HLRs at the same time, and at this time, the redundant HLR is called a redundancy center. Its core content is that the primary home location register outputs all the subscription information of the users whose subscription information has changed into a text file in the agreed format, and submits it to the redundancy disaster center through a dedicated line for loading, so as to achieve data consistency between the two parties.

Although the network structure of the above-mentioned 1+1 extended mobile application partial protocol signaling solution is relatively simple, there are the following problems:

1) High cost: Obviously, it is very costly to equip a large number of home location registers running on the Internet with a redundant disaster system, especially when the failure probability of home location registers is very small; even if 1+1 circular redundancy system is adopted Although there is no need to increase the number of HLRs, each HLR is required to back up the user data of other HLRs, so the cost of upgrading the equipment is still very high;

2) The technical difficulty is relatively large, and the implementation period is long: the HLR in this scheme should not only notify the other HLR of the change of its own HLR user data according to the standard signaling method, but also receive and process the HLR sent by the other party. User data synchronization message, home location register software system needs relatively large changes;

3) Difficulty in management, because the HLR contains other HLR user data, which makes the existing management mode difficult;

4) There is no clear solution to the compatibility, especially the backup of the characteristic business data customized by each manufacturer.

5) There is a relatively large impact on the existing signaling system: because a large amount of daily data is synchronized and transmitted completely through the No. 7 signaling network, the signaling load is doubled.

Although the N+1 synchronous contract data solution avoids the defects of the 1+1 redundancy solution, it still has the following problems:

1) It has a great impact on the performance of the existing HLR: due to each change of the corresponding subscription information, the active HLR must output all the subscription information of the user; the redundancy center also needs to The cumbersome account cancellation and account opening operations have a great impact on the protocol message processing capability of the mobile application part of the system;

2) The transformation of existing network equipment is relatively large, and the implementation of the scheme is relatively low: since all user data changes are output by the primary HLR, in order to support the redundancy feature, all primary HLRs are required to be Upgrading and commissioning require a huge amount of work, but the feasibility is relatively low.

Contents of the invention

Aiming at the problems existing in the existing HLR data redundancy method in the background technology, the present invention proposes a HLR redundancy method through a mobile communication operation system.

In order to solve the above problems, the present invention adopts the following technical solutions,

The method for implementing the home location register redundancy disaster through the mobile communication operation system includes the following steps:

a, corresponding to multiple active home registers that need to be redundant, set up a redundant disaster center home location register;

b. Add an operation command translation module to the primary HLR business system that requires redundancy;

c. Establish a wide area network connection between the business system of the main HLR and the redundancy center, and configure the handover signaling of the surrounding network elements of the HLR according to the standard method;

d. Synchronize the user data in the active HLR to the redundancy center, that is, establish the data baseline of the redundancy center;

e. The business office of the main attribution location register outputs incremental commands according to the format agreed between the redundant disaster center and the business office, and the redundant disaster center executes them synchronously to achieve the consistency of incremental data;

f, when the main home location register fails, trigger the signaling switchover of the surrounding network elements, so as to realize the service switchover;

g. After the failure of the master home location register is eliminated, the service is switched back.

The establishment of the redundant disaster center in the step a is based on the general home location register, and a standard operation instruction loading interface is added in the home location register host to load, analyze and execute various standard operation instructions. A file transfer protocol communication module is added to the location register host to regularly obtain standard operating instructions stored in text form from the other N main HLR business systems, and load them into the HLR host through the loading interface.

The step b refers to adding an operation command translation software to the original business system of each main HLR, when the operation command sent by the business system for modifying the user subscription information is correctly executed by the main HLR , the operation instruction translation software converts these internal format operation instructions into the standard operation instructions required by the redundancy system, and saves them locally in text form.

The connection mode in step c includes one of DDN, X.25 or E1.

In said step d, establishing the data baseline of the redundant disaster center refers to manually synchronizing the data in each active home location register to the redundant disaster center home location register when the system starts for the first time, so as to establish the initial user data baseline and System data baseline, where user data baseline refers to user-level contracted business data, and system baseline data refers to system-level information, including account opening template data, smart business template data, and system-level setting parameters.

In the step e, synchronizing the incremental data in the normal operation phase refers to that in the normal operation phase, all the business hall instructions for modifying user subscription data that have been successfully executed by each master home location register business system according to a unified format Translate the operating instructions of the business hall in a standard format and store them in text files in the local specified directory. The home location register of the redundancy disaster center obtains these text files from the main home location registers through the file transfer protocol server, and loads the Go to the home location register host of the redundancy center.

The service switching after the failure in the step f is to use the data configuration of the switching signaling that has been set on the mobile switching center and the signaling transfer point to forward the message originally sent to the fault home location register to the redundant disaster Central Home Location Register.

The service switching after the fault is eliminated in the step g is to redirect the signaling from the redundant disaster HLR to the active HLR by restoring the signaling configuration of the mobile switching center and the signaling transfer point.

Due to the adoption of the above-mentioned technical solution, the present invention has the following advantages compared with the traditional redundancy method:

1) The impact on the existing system is relatively small, and it has strong operability: since all operation instructions are output by the business system at the periphery of the home location register, the home location register responsible for processing part of the protocol signaling of the mobile application There is almost no impact on the host; and since the synchronized operation instructions are transmitted through dedicated lines, there will be no load impact on the existing signaling system.

2) The requirements for the transmission line are low: only those operating instructions that cause the user subscription information to change are transmitted between the N primary HLRs and the redundancy center, and the N As far as the +1 scheme is concerned, the requirements for the transmission rate of the line are relatively low. For a 1 million home location register, a 64K transmission line can satisfy daily data synchronization.

3) The cost is relatively low: for the redundant HLR, its business system simply stores the successfully executed operation instructions in the local text file in the agreed format, so there is no need to upgrade the system hardware. The program cost is relatively low.

4) Compatibility redundancy support: Since the communication between the redundant disaster center and each main HLR is only established through standard operation instructions, as long as the main HLR business system can output standard operation instructions, it can be included in this In a redundant disaster system, the compatibility and scalability of the solution are relatively good.

Description of drawings

FIG. 1 is a schematic diagram of implementing 1+1 cyclic data redundancy by extending MAP signaling.

FIG. 2 is a diagram of a network structure for realizing N+1 redundancy by using the method of the present invention.

Detailed ways

In the method of the present invention, please refer to as shown in Fig. 2, in this figure, the right box shows the redundant disaster center, and the left side shows the business system (HLR1, HLR2...HLRn) that there are n main HLRs , they together constitute a redundant disaster system. Each business system has a master home location register and a communication machine. The administrator corresponds to multiple primary home location registers that need to be redundant, and centrally establishes a redundant disaster center home location register. The operation system of each primary home location register is responsible for periodically synchronizing the operation instructions for modifying user subscription information to the Transmit to the home location register of the redundancy center.

For the domestic HLR, the data maintenance of the HLR includes two parts: the maintenance of user data through the business system and the maintenance of system data through the host system terminal, and the maintenance frequency of the former is much higher than that of the latter . On the basis of comprehensively considering the completeness of redundant disaster data, the cost and performance of the redundant disaster system, and the degree of influence on the host of the home location register, it is determined that the N +1 Compatibility redundancy solution.

To be more specific, the method firstly enables each main HLR to add an operation command translation function software to the existing business system, when the operation command sent by the business system for modifying user subscription information is received by the main HLR After correct execution, the operation instruction translation software converts these internal format operation instructions into the standard operation instructions required by the redundancy disaster center, and saves them locally in text form;

Then, the disaster redundancy center regularly obtains these operation instruction files from the main home location register business systems through the file transfer protocol mechanism, and loads them into the home location register host of the redundancy disaster center in sequence, so as to realize the synchronization of the data of both parties;

For the operation instructions that cannot be correctly executed by the home location register of the redundant disaster center, the redundant disaster center will save the error log, which will be regularly checked and confirmed by the redundant disaster system administrator.

All the static subscription data of the N operating HLRs in the redundancy disaster area are backed up in the HLR of the redundancy disaster center. If one of the N HLRs in operation fails, the redundant disaster HLR can use the backup data of the faulty HLR on the local machine to provide the users in the faulty HLR with signaling switching. Services such as roaming and calling; moreover, the redundancy center in this solution also supports service takeover of multiple faulty active HLRs.

The disaster redundancy method of the present invention specifically comprises the following steps:

a, corresponding to multiple active home registers that need to be redundant, set up a redundant disaster center home location register;

b. Add an operation command translation module to the primary HLR business system that requires redundancy;

c. Establish a wide area network connection between the business system of the main HLR and the redundancy center, and configure the handover signaling of the surrounding network elements of the HLR according to the standard method;

d. Synchronize the user data in the active HLR to the redundancy center, that is, establish the data baseline of the redundancy center;

e. The business hall of the main attribution location register outputs incremental commands in accordance with the agreed format between the disaster center and the business hall, and the redundant disaster center executes them synchronously to achieve the consistency of incremental data;

f, when the main home location register fails, trigger the signaling switchover of the surrounding network elements, so as to realize the service switchover;

g. After the failure of the master home location register is eliminated, the service is switched back.

In step a above,

On the basis of the general HLR, the Redundancy Center has expanded the following content. First, a standard operation instruction loading interface has been added to the HLR host to load, parse, and execute various standard operation instructions; secondly, in the A file transfer protocol communication module is added to the HLR mainframe, and the standard operating instructions stored in text form are regularly obtained from the other n main HLR business systems by the common method in the industry, and loaded into the HLR through the loading interface in the host.

In step b,

Add an operation instruction translation software module to the original business system in each master home location register. When the operation instruction sent by the business system for modifying user subscription information is correctly executed by the master home location register, this software module is responsible for translating The operating instructions in these internal formats are converted into the standard operating instructions required by the redundancy system and stored locally in text.

Similar to the business system operating instructions commonly used in mobile engineering, this standard operating instruction can be described in ASCII format, but not limited to, including account opening/account cancellation/card replacement/change of user business status, etc.

See the table below for examples:

Command name: MOD-ODBPARA

Function description: Modify the blocking parameters determined by the network operator

Parameter meaning: parameter name Parameter Type parameter range Chinese meaning English meaning Remark imsi string type 15 IMSI number imsi, isdn must and can only choose one isdn string type 8~6 MSISDN number odbf Boolean class true, f Whether to use ODB optional type alse odbss enumerated type Whether the operator decides to block the service - block supplementary service access odbss optional enum name enumeration value nobss 0 Does not provide closed supplementary services bss 1 Provide closed supplementary services odbic enumerated type Blocking service determined by the operator - blocking all incoming calls OdbIncomingCalls optional enum name enumeration value nobic 0 Do not block incoming calls No barring of incoming calls bic 1 block all incoming calls Barring of fall incoming calls bicro 2 Block all incoming calls roaming out of the home PLMN country Barring of fall incoming calls when roaming outside the homePLMNcountry odboc enumerated type Blocking service determined by the operator - blocking all outgoing calls OdbOutgoingCalls optional enum name enumeration value noboc 0 unblock out call No barring of outgoing calls boc 1 Block all outgoing calls Barring of fall out going calls boic 2 Block all international outgoing calls Barring of fall out going international calls boiceh 3 Block all international outgoing calls except home country Barring of fall out going international calls except those directed to the homePLMNcountry boicwr 4 Block all roaming outgoing calls from the home PLMN country BarringofalloutgoingcallswhenroamingoutsidethehomePLMNcountry odbpb1 Boolean type true, false Blocking service determined by the operator - PLMN specific blocking type 1 (currently blocking long-distance outgoing calls) OdbPlmnBar1 optional odbpb2 Boolean class true, f operator-determined lockout OdbPlmnBar2 optional type alse Business-PLMN Specific Blocking Type 2 odbpb3 Boolean type true, false Blocking business determined by the operator - PLMN specific blocking type 3 OdbPlmnBar3 optional odbpb4 Boolean type true, false Blocking business determined by the operator - PLMN specific blocking type 4 OdbPlmnBar4 optional odboe Boolean type true, false Blocking service determined by the operator - blocking high-rate entertainment service outbound calls Odb Outgoing Entertainment optional odboi Boolean type true, false Blocking service determined by the operator - blocking outbound calls of high-rate audio services Odb Outgoing Information optional odbr enumerated type Blocked services determined by the operator - roaming restrictions Odb Roaming optional enum name enumeration value noa 0 not limited NotActive broh 1 Block out the home PLMN roaming Barring of roaming outside the homePLMN brohc 2 Lock out the roaming in the country where the PLMN belongs Barring of roaming outside the homePLMNCountry

Example:

(1) MOD-ODBPARA: isdn = "8613902700001", odbf = false;

(2) MOD-ODBPARA: isdn="8613902700001", odbf=true, odboc=boc;

In step c, the connection mode includes one of DDN, X.25 or E1. On the surrounding network elements of the HLR, including STP (Signaling Transfer Point) and MSC (Mobile Switching Center), the active and standby HLRs are respectively configured as subsystems for mutual backup.

In step d, a data baseline of the redundant disaster center is established to realize data consistency between the active HLR and the redundant disaster HLR.

When the system starts for the first time, it is necessary to manually synchronize the data in each active HLR to the HLR of the redundant disaster center to establish an initial data baseline. Specifically, it is divided into two parts: establishing user data baseline and establishing system data baseline. Among them, the establishment of the baseline of user data is exactly the same as the HLR cutover method commonly used in the industry, and will not be described in detail; the baseline of user data refers to the subscription service data at the user level, and the baseline data of the system refers to information at the system level, including account opening template data, Intelligent business template data, system-level setting parameters.

Since it involves the corresponding relationship between the master and backup home location registers of the template, further description is given below:

The active HLRs are independent of each other, and the templates with the same content may have different code names in different HLRs, so the administrator of the redundant disaster system must maintain the template of the redundant disaster center and the templates of the N active HLRs In addition, the business system that requires the main HLR must record this correspondence to ensure that the local operation instructions can be correctly converted into standard operation instructions. For example: the No. 1 account opening template of a primary HLR corresponds to the No. 10 account opening template of the redundancy disaster center, then when the primary HLR business office opens an account with the No. 1 template in the system, it will be submitted to the redundancy disaster center The operation instruction must be translated into an account opening instruction using template No. 10.

Step e is mainly to synchronize the incremental data in the normal operation phase. In the normal operation phase, each primary HLR business system translates all successfully executed business hall instructions for modifying user subscription data into standard operating instructions in business hall format, and store them in text files in the local designated directory; the home location register of the redundant disaster center obtains these text files from each main home location register through the file transfer protocol server, and loads them into the redundant disaster center Home location register host.

For step f, when the primary home location register fails, take common measures in the industry to modify the handover signaling data configuration that has been set on the corresponding mobile switching center and signaling transfer point, and send the original to the faulty home location The message of the register is forwarded to the home location register of the disaster redundancy center for processing. For step g, after the failure of the active HLR is eliminated, the signaling is redirected from the redundant HLR to the active HLR by restoring the signaling configuration of the mobile switching center and the signaling transfer point.

Above, those of ordinary skill in the art should recognize that the above embodiments are only used to illustrate the method of the present invention, and are not used as a limitation to it, as long as within the scope of the spirit of the present invention, the above Variations of the above embodiments should fall within the scope of the method of the present invention.

Claims (8)

1. A method for realizing home location register redundant disaster by mobile communication operation system, characterized in that, the redundant disaster method comprises the following steps: a, corresponding to multiple active home registers that need to be redundant, set up a redundant disaster center home location register; b. Add an operation command translation module to the primary HLR business system that requires redundancy; c. Establish a wide area network connection between the business system of the main HLR and the redundancy center, and configure the handover signaling of the surrounding network elements of the HLR according to the standard method; d. Synchronize the user data in the active HLR to the redundancy center, that is, establish the data baseline of the redundancy center; e. The business office of the main attribution location register outputs incremental instructions in the format agreed between the redundant disaster center and the business office, and the redundant disaster center executes them synchronously to achieve the consistency of incremental data; f, when the main home location register fails, trigger the signaling switchover of the surrounding network elements, so as to realize the service switchover; g. After the failure of the master home location register is eliminated, the service is switched back. 2. The method for realizing home location register redundancy disaster through the mobile communication operation system as claimed in claim 1, characterized in that: the establishment of the redundancy disaster center in said step a is based on the general home location register, in the home location register A standard operating instruction loading interface is added to the host for loading, parsing, and executing various standard operating instructions, and a file transfer protocol communication module is added to the HLR host to regularly download data from other N main HLR business systems. Obtain the standard operating instructions stored in the form of text, and load them into the HLR host through the loading interface. 3. The method for realizing home location register redundancy disaster through mobile communication operating system as claimed in claim 1, characterized in that: said step b refers to adding an operation command translation on the original operating system of each primary home location register Software, when the operating instructions sent by the business system for modifying user subscription information are correctly executed by the master home location register, the operating instruction translation software converts these internal format operating instructions into standard operating instructions required by the redundant disaster system, And save it locally as text. 4. The method for implementing home location register redundancy through the mobile communication operating system according to claim 1, characterized in that: the connection mode in step c includes one of DDN, X.25 or E1. 5. The method for realizing home location register redundancy disaster through the mobile communication operation system as claimed in claim 1, characterized in that: in said step d, establishing the data baseline of the redundancy disaster center means that when the system is first started, each The data in the active HLR is manually synchronized to the HLR of the redundant disaster center to establish the initial user data baseline and system data baseline, where the user data baseline refers to the subscription service data at the user level, and the system baseline data refers to the system-level data. information, including account opening template data, smart business template data, and system-level setting parameters. 6. The home location register redundancy method as claimed in claim 1, characterized in that: in the step e, synchronizing the incremental data in the normal operation phase refers to that in the normal operation phase, each master Use the home location register business system to translate all successfully executed business hall instructions for modifying user subscription data into standard format business hall operation instructions according to a unified format, and store them in a text file in the local designated directory. The home location register of the disaster center obtains these text files from each active home location register through the file transfer protocol server, and loads them into the home location register host of the redundant disaster center. 7. The home location register redundancy disaster method realized by the mobile communication operating system as claimed in claim 1, characterized in that: the service switching after the failure in the described step f is to utilize the mobile switching center and the signaling transfer point The handover signaling data configuration that has been set on the network, forwards the message originally sent to the home location register of the fault to the home location register of the disaster redundancy center. 8. The home location register redundancy disaster method realized by the mobile communication operation system as claimed in claim 1, characterized in that: in the step g, the service switching after the fault is eliminated is by restoring the mobile switching center and the signaling transfer point The signaling configuration is used to redirect the signaling from the redundant HLR to the active HLR.

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