KR100670071B1 - Data agreement method between VLR and HLR of mobile communication network - Google Patents

Abstract

The present invention selectively registers the subscriber of the abnormal primary HLR to the secondary HLR in the VLR performing the location registration of the subscriber, thereby matching the location information of the mobile communication subscribers between the secondary HLRs in the VLR so that the mobile communication subscriber can normally communicate. The present invention relates to a data matching method between a VLR and an HLR of a mobile communication network to support a service. The present invention relates to an ISLR by storing signal point information of an HLR transmitting a location registration message in a VLR when registering a location of a mobile communication terminal. Upon reception of the Unreliable Roamer Data Directive (URDD) operation defined in -41C, the VLR's subscriber database is modified to selectively re-register the subscriber to the signaling point of the HLR that sent the above message. Therefore, the mobile communication service can be enabled by matching the information of the subscriber of the HLR in an abnormal state with the secondary HLR without generating a load in the VRL, and also reduces the load of the network, and the call completion rate which is important in the mobile communication network. Increased reliability

Description

Data agreement method between VRL and HRL of mobile communication network {Data agreement method between VLR and HLR of mobile communication network}

1 is a network diagram illustrating a data matching method between a VLR and an HLR in a mobile communication network of the present invention;

2 and 3 are flowcharts illustrating a data matching method between a VLR and an HLR in a mobile communication network of the present invention.

     2 is a flowchart illustrating a method of receiving a MAP message and changing a subscriber;

     3 is a flowchart illustrating a location registration procedure with an HLR.

<Explanation of symbols for the main parts of the drawings>

10: cell phone 20: BTS

30: MSC / VLR 40: Primary HLR

50: Secondary HLR

The present invention relates to a data matching method between a VLR (Visitor Location Register) and a HLR (Home Location Register) of a mobile communication network, and more particularly, when an abnormal performance of a primary (HLR) function is performed in a mobile communication network, or connected by an HLR. When the link is deactivated, the VLR of the mobile communication network to selectively relocate the subscriber of the abnormal primary HLR to the secondary HLR in the VLR performing the location registration of the subscriber so that the subscriber receives normal mobile network service. And data matching method between HLR.

In general, all network entities in a mobile communication network have a fault tolerance structure due to redundancy. However, functionally, an abnormal situation of a redundant HLR or a deactivation of a duplicated link may occur. At this time, the service should be transferred to the secondary HLR where the information of the mobile subscriber of the primary HLR is backed up, and the location of the subscriber is frequent to match the information on the location of the mobile network subscriber in the primary HLR and the secondary HLR in real time. Difficult because of the load on the move.

That is, in the prior art, when an abnormal situation of a redundant primary HLR or a deactivation of a redundant link occurs, a secondary HLR in which subscriber data is backed up transmits an URDD (Unreliable Roamer Data Directive) operation to the VLR, and in the VLR that receives a message All the subscribers (including the HLR subscribers in normal situation) stored in the network are newly registered to increase the network load, and the VLR performs the location registration when the mobile subscriber accesses the VRL by calling lights due to the VLR load problem. Therefore, there is a problem in that the time required for subscriber data matching between the secondary HLR and the VLR increases.

 Therefore, the present invention has been made to solve the above-mentioned conventional problems, the object of the VLR to perform the location registration of the subscriber to the secondary primary HLR of the subscriber of the abnormal primary HLR selectively relocated to the VLR The present invention provides a data matching method between a VLR and a HLR of a mobile communication network in which mobile communication subscribers receive normal communication service by matching location information of mobile communication subscribers between secondary HLRs.

A feature of the data matching method between the VLR and the HLR of the mobile communication network according to the present invention for achieving the above object is that, when the location registration of the mobile communication terminal, the signal point information of the HLR for transmitting a location registration message from the VLR to the subscriber database When receiving and storing URDD (Unreliable Roamer Data Directive) operation defined in IS-41C, the VLR subscriber database is changed so that the subscriber can be re-registered at the signaling point of the HLR that sent the above message.

In addition, when receiving an unreliable roamer data directive (URDD) operation, the primary HLR signal point and the secondary HLR signal point are extracted with reference to a database of signal point information of a signaling connection control part (SCCP), and the subscriber data of the VLR is extracted. Change the base.

In addition, when receiving an Unreliable Roamer Data Directive (URDD) operation, a base station that performs an interface operation with a mobile communication terminal, and all base stations to forcibly register all available subscribers currently roaming to the base station. The system parameter of the base station is changed to match the data of the mobile subscriber between the HLR and the VLR in a short time.

In addition, it is applicable in the same manner as described above not only when switching from the primary HLR to the secondary HLR, but also when re-changing from the secondary HLR to the primary HLR.

Hereinafter, a preferred embodiment of a data matching method between a VLR and an HLR in a mobile communication network according to the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIG. 1, the MSC / VLR uses various types of MAP messages (commands) through various network elements such as HLR and different interfaces to perform various functions such as call processing and location registration of a mobile communication network. In this case, the HLR, which acquires subscriber data of MSC / VLR, is a primary HLR and a secondary HLR. The network is configured to allow one HLR to switch to the other when an abnormal situation occurs.

However, in order to process the information on the location information of the subscriber between the primary HLR and the secondary HLR in real time, as the number of subscribers increases, the load is generated, so that the data of subscribers is matched at the minimum time. HLR abnormality in MSC / VLR If a situation occurs, the subscriber must perform location registration for a subscriber data inconsistency in a short time, and actively cope with data matching between the primary HLR and the secondary HLR.

Therefore, in the application part (AP) of the MSC / VLR of the present invention, a predetermined attribute is added to store the signaling point of the HLR in the subscriber database as shown in Table 1 below.

Pre-change subscriber database R_MSUB_DATA (subscriber database name) D_MDN char (12) Subscriber station number D_ESN bit (32) Subscriber's serial number D_MSC_IC bit (32) Subscriber's MSC ID D_CFI bit (32) Subscriber's Supplementary Service Information : : D_REG_ZONE bit (16) Subscriber's location information Subscriber database after change R_MSUB_DATA (subscriber database name) D_MDN char (12) Subscriber station number D_ESN bit (32) Subscriber's serial number D_MSC_IC bit (32) Subscriber's MSC ID D_CFI bit (32) Subscriber's Supplementary Service Information : : D_REG_ZONE bit (16) Subscriber's location information D_HLR_PC bit (16) Subscriber Location HLR Signaling Point D_CONFIRM_FLAG bit (16) Subscriber Re-Registration

In the second step, the primary HLR stores the signaling points of the primary HLR in the subscriber's database stored in the inservice VLR.

In the third step, when an abnormal state of the primary HLR or a link deactivation to the primary HLR occurs, the transfer to the secondary HLR occurs and the URDD (Unreliable Roamer Data Directive) operation is transmitted from the secondary HLR to the MSC / VLR.

In step 4, the MSC / VLR receiving the Unreliable Roamer Data Directive (URDD) message searches the signal point database of the SCCP shown in FIG. 3 as the signal point of the HLR transmitting the message, and searches the signal points of the primary HLR and the secondary HLR. Extract.

For reference, the signal point data table of the SCCP is shown in Table 2 below.

SCCP Signal Point Database R_SCCP_PC (Signal Point Database Name) D_PFX int (0: 9999) Subscriber Terminal Prefix D_Primary_pc bit (16) primary HLR pc according to prefix D_Secondary_pc bit (16) Secondary HLR pc according to prefix Stored Value D_Primary_pc = 0x aaaa D_Secondary_pc = 0xbbbb in Prefix 200-300 D_Primary_pc = 0x cccc D_Secondary_pc = 0xdddd in Prefix 400-500

In addition, in step 5, D_CONFIRM_FLAG is changed to true indicating that relocation registration is required for the same subscriber in the subscriber's database stored in the MSC / VLR as the primary HLR and secondary HLR signal points extracted above.

In order to force location registration of all available subscribers roaming to the base station in step 6, commands are sequentially transmitted to the base station to change the base station system parameters (eg, location registration period, system ID, etc.). .

All subscribers of the base station having received the command of step 6 transmit a location registration message to the base station. The message thus transmitted performs step 7 which is transmitted to the MSC / VLR.

In step 8, the MSC / VLR receives the location registration message and performs location registration with the secondary HLR only for the subscriber whose subscriber database is set to NOT_HLR_CONFIRM and ignores the location registration message for the subscriber who does not.

In step 9, if step 6 is performed for all base stations, the location information of the subscriber stored in the secondary HLR is identical to that of the MSC / VLR.

In addition, the present invention can implement the function for the entity (entity) that requires data matching with the VRL, such as SCP (Service Control Point) of the intelligent network.

As described above, according to the data matching method between the VLR and the HLR of the mobile communication network according to the present invention, the mobile communication service is enabled by matching the information of the subscriber of the HLR in the abnormal state with the secondary HLR without generating a load in the VRL. In addition, there are various effects of reducing the load on the network and increasing call completion rate and reliability, which are important in the mobile communication network.

Claims (6)

When registering the location of the mobile communication terminal, the VLR stores the signal point information of the HLR, which transmits the location registration message, in the subscriber database and receives the Unreliable Roamer Data Directive (URDD) operation defined in IS-41C. A method of data matching between a VLR and an HLR in a mobile communication network, wherein the subscriber database of the VLR is changed to selectively re-register a subscriber at a signal point of the VLR. The method of claim 1, wherein upon receiving an Unreliable Roamer Data Directive (URDD) operation, a signal point of a primary HLR and a signal signal of a secondary HLR are extracted by referring to a database of signal point information of a signaling connection control part (SCCP). A method of data matching between a VLR and an HLR in a mobile communication network, characterized by changing a subscriber database of a VLR. The mobile station of claim 1, wherein upon receiving an Unreliable Roamer Data Directive (URDD) operation, a base station performing an interface operation with a mobile communication terminal is forcibly registering all available subscribers currently roaming to the base station. A method of data matching between a VLR and a HLR of a mobile communication network, wherein a system parameter of a base station is changed for all base stations so as to match data of a mobile subscriber between the HLR and a VLR within a short time. Adding a predetermined attribute to store the signaling point of the HLR in the subscriber database in the AP (Application Part) of the MSC / VLR; Storing the signal point of the primary HLR in a subscriber's database in which the primary HLR is stored in the inservice VLR; Transmitting an unreliable roamer data directive (URDD) operation from the secondary HLR to the MSC / VLR by switching to the secondary HLR when an abnormal state of the primary HLR or a link deactivation to the primary HLR occurs; The MSC / VLR receiving the Unreliable Roamer Data Directive (URDD) message retrieves the signal point database of the SCCP shown in FIG. Steps; Changing the D_CONFIRM_FLAG to true indicating that relocation registration is required for the same subscriber in the subscriber's database stored in the MSC / VLR with the primary HLR and the secondary HLR signal points extracted above; Step 6 of sequentially transmitting a command to the base station to change the base station's system parameters (e.g., location registration period, system ID, etc.) for all base stations to forcibly register all available subscribers roaming to the base station; ; All the subscribers of the base station which have received the command of step 6 transmit a location registration message to the base station, and the transmitted message is transmitted to the MSC / VLR; Receiving the location registration message, the MSC / VLR performs location registration with the secondary HLR only for subscribers having the subscriber database set in step 5 as NOT_HLR_CONFIRM; And When the six steps are performed for all base stations, the location information of the subscriber stored in the secondary HLR is composed of nine steps corresponding to the MSC / VLR. 5. The method of claim 4, wherein the subscriber database stores data as shown in Table 3 below. Subscriber Database R_MSUB_DATA (subscriber database name) D_MDN char (12) Subscriber station number D_ESN bit (32) Subscriber's serial number D_MSC_IC bit (32) Subscriber's MSC ID D_CFI bit (32) Subscriber's Supplementary Service Information : : : D_REG_ZONE bit (16) Subscriber's location information D_HLR_PC bit (16) Subscriber Location HLR Signaling Point D_CONFIRM_FLAG bit (16) Subscriber Re-Registration 5. The method of claim 4, wherein the data is stored in the signal point data table of the SCCP as shown in Table 4 below. SCCP Signal Point Database R_SCCP_PC (Signal Point Database Name) D_PFX int (0: 9999) Subscriber Terminal Prefix D_Primary_pc bit (16) primary HLR pc according to prefix D_Secondary_pc bit (16) Secondary HLR pc according to prefix Stored Value D_Primary_pc = 0x aaaa D_Secondary_pc = 0xbbbb in Prefix 200-300 D_Primary_pc = 0x cccc D_Secondary_pc = 0xdddd in Prefix 400-500

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