KR100790095B1 - How to construct IP address and temporary mapping table automatically in mobile communication system - Google Patents

Abstract

The present invention relates to a method for managing IP address and temporary (IMSI) in a European mobile communication system that provides a general packet radio service (GPRS). In particular, a method for automatically constructing and updating the IP address and IMSI It is about. The present invention is a mobile communication including a service packet radio service support node having a network database related to a network configuration, and a plurality of gateway packet radio service support nodes connected to the packet radio service support node with an IP address / temporary mapping table. A method of automatically constructing an IP address / temporary mapping table of a system, the method comprising: transmitting, by a mobile station, a list of gateway packet radio service support nodes to a home location register when a packet service registration request is made by a mobile station; Transmitting, by the location register, the temporary value and IP address for the mobile station to the gateway packet wireless service support nodes, and receiving and storing the temporary value and IP address by each gateway packet wireless service support node. It is characterized by consisting of a process.

IMSI, IP Packet Address, Automatic Update,

Description

Method of Automatically Constructing IP Address and Temporary Mapping Table in Mobile Communication System {METHOD FOR AUTOMATIC MAKING IP ADDRESS AND IMSI MAPPING TABEL IN MOBILE COMMUNICATION SYSTEM}             

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

2 is a flowchart illustrating a method of automatically updating an IP address and a temporary mapping table of a mobile communication system according to a first embodiment of the present invention.

3 is a flowchart illustrating a method of automatically updating an IP address and a temporary mapping table in a mobile communication system according to a second embodiment of the present invention.

4 is a flowchart illustrating a method of finding an SGSN serving a mobile station using a mapping table according to an embodiment of the present invention.

5 is a flowchart illustrating a method of managing an IP address / temporary value mapping table of a gateway wireless packet service support node according to an embodiment of the present invention;
6 is a flowchart illustrating a method of deleting an IP address corresponding to a specific temporary value in an IP address / temporary value mapping table of a gateway wireless packet service support node according to an embodiment of the present invention.

The present invention relates to a method of managing an IP address and an International Mobile Subscriber Identity (hereinafter referred to as a temporary interim) in a European mobile communication system that provides a general packet radio service (GPRS). And a method for automatically updating a temporary mapping table.

The UMTS (Universal Mobile Terrestrial System), which is a mobile communication system, is a system that performs 3rd generation mobile communication. The UMTS system supports not only a voice service but also a packet data service, and supports high speed data communication and video communication. A general packet radio service (GPRS) network, which is a packet data domain of a core network of the UMTS system, performs a packet data service. When a packet call is received by an IP packet in a mobile communication system providing a packet data service, a gateway GPRS support node (GGSN) receives the packet call by a destination IP address included in the packet call. Used to find the temporary of a mobile station to transmit. To this end, the gateway packet radio service network (GGSN) has an IP address and temporary mapping table with an IP address for any mobile station and a temporary corresponding to the IP address.

The IP address and the temporary mapping table should be constructed and serviced by an operator. In this case, if the subscriber changes the IP address or temporary value, the operator must connect to the gateway packet radio service support node (GGSN) network and update it directly.

As described above, there was a problem in that the operator directly establishes the IP address and temporary mapping table. In particular, when the subscriber changes the IP address and the temporary value while allocating the IP address and the temporary address to a specific subscriber, the operator directly applies the IP address and the temporary mapping table. There is a problem of updating the IP address and temporary mapping table by accessing the network.

Accordingly, an object of the present invention is to provide a method in which an operator can automatically generate an IP address and a temporary mapping table without directly building the IP address and temporary mapping table in a mobile communication system.

Another object of the present invention is to provide a method for automatically updating when an IP address and a temporary value change in a mobile communication system having an IP address and a temporary mapping table.

The present invention for achieving the above object; IP address / mobile address of a mobile communication system having a service packet radio service support node having a network database related to a network configuration, and a plurality of gateway packet radio service support nodes having an IP address / temporary mapping table and connected to the packet radio service support node. A method of automatically constructing a temporary mapping table, the mobile station transmitting a list of the gateway packet radio service support nodes to a home location register when the mobile station requests a packet service registration; Transmitting a temporary value and an IP address for a mobile station to the gateway packet wireless service support nodes, and receiving and storing the temporary value and IP address at each gateway packet wireless service support node. The features.

The present invention to achieve the above another object; Service packet wireless service support node having information related to network configuration, gateway packet wireless service support node having IP address / temporary mapping table, service packet wireless service support node and gateway packet wireless service support node. A method of automatically constructing an IP address / temporary mapping table of a mobile communication system having a home location register, the mobile station serving the mobile station serviced by the service packet radio service support node when a packet service registration request is made. A service packet radio service support for serving the mobile station by informing a home location register and the configuration information of the service packet radio service support node and the gateway packet radio service support node by the home location register; Constructing a list of gateway packet radio service support nodes connected to the network, and transmitting an IP address and a temporary value for the mobile station to the gateway packet radio service support nodes of the list; And receiving and storing an IP address and a temporary value for the mobile station.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be noted that in the following description, only parts necessary for understanding the operation according to the present invention will be described, and descriptions of other parts will be omitted so as not to distract from the gist of the present invention. Hereinafter, the configuration of a message not described is referred to 3GPP TS 29.002 v3.7.2 (2000-12).

1 is a diagram schematically illustrating a packet radio service network for performing a function in an embodiment of the present invention.

First, a GPRS Support Node (GSN), a node supporting General Packet Radio Service (GPRS), is a function required to support packet radio service function for GSM and / or UMTS. And one or more packet radio service support nodes in any Public Land Mobile Network (PLMN) 300. The gateway GPRS support node (GGSN) 130 is a node connected by a packet data network because of the evaluation of a packet data protocol (PDP) address. Here, the PDP address includes routing information for users to which a PS (Packet Switched) is attached, and the routing information is a current connection point of a mobile station (MS), that is, a service packet wireless service support node (SGSN). Support Node) is used to tunnel N-PDUs to a connection point such as 110. The gateway packet radio service support node 130 includes an IP address and a temporary table having IP values of respective mobile stations and temporary values corresponding to the IP addresses for the tunneling. The gateway packet radio service support node 130 requests location information from a home location register (HLR) 307 through an optical Gc 305 interface. The gateway packet radio service support node 130 becomes the first point of a PDN interconnect with a GSM PLMN that supports GPRS (ie, Gi 309 reference point supported by the gateway packet radio service support node 130). will be. The gateway packet radio service support node 130 function is a function corresponding to GSM and UMTS in common.

The service packet radio service support node 110 is a node serving the mobile station. The service packet radio service support node 110 may include GSM (ie, a Gb 311 interface supported by the service packet radio service support node 110) and / or UMTS (ie, the service packet radio service support node ( Packet radio service for the Iu 313 interface supported by 110). In the PS connection, the service packet radio service support node 110 establishes, for example, a mobility management context including information related to mobility and security of the mobile station. In activation of the PDP environment, the service packet radio service support node 110 establishes a PDP environment to be used for routing purposes with the gateway packet radio service support node 130 for use by the subscriber.

The service packet radio service support node 110 and the gateway packet radio service support node 130 functions may be combined in the same physical node or may exist in different physical nodes. The service packet radio service support node 110 and the gateway packet radio service support node 130 include an IP or other (at the operator's option, for example ATM-SVC) routing function and are interconnected by an IP router. . In the UMTS, the service packet radio service support node 110 and a radio network controller (RNC) are interconnected with one or more IP routers. When the service packet radio service support node 110 and the gateway packet radio service support node 130 are in different PLMNs, the service packet radio service support node 110 and the gateway packet radio service support node 130 are connected to a Gp. 315 are interconnected via an interface. The Gp 315 interface not only provides the Gn 317 interface function but also has the security function required for PLMN internal communication. The security function is based on mutual agreement between operators.

The service packet wireless service support node 110 transmits location information to a Mobile Switching Center (MSC) / Visitor Location Register (VLR) 321 through an optical Gs 319 interface. The service packet radio service support node 110 receives a paging request from the mobile switch / visitor location register 321 via the Gs 319 interface. The service packet radio service support node 110 interfaces with the GSM-SCF for selective Customized Applications for Mobile Network Enhanced Logic (CAMEL) control. Depending on the results resulting from the CAMEL interaction, the SESSION and packet data transmissions generally proceed.                     

In addition, the illustrated Ga 323 interface is a CDR (Call Detail Record) transmission device (for example, the service packet radio service support node 110 or the gateway packet radio service support node 130) and the CDR reception function (CGF) Perform a data collection interface between 325. The Gb 311 interface is an interface between the service packet radio service support node 110 and a base station system (BSS) 327, and the Gc 305 interface is the gateway packet radio service support node. An interface between the 130 and the home location register 307. The Gd 329 interface may include a short message service gateway (SMS-GMSC) 331, the service packet wireless service support node 110, and a short message service-interaction mobile exchange (SMS-GMSC). SMS-IWMSC: Short Message Service Interworking MSC (331) interface, Gf 333 interface is the interface between the service packet radio service support node 110 and the EIR (335). The Gi 309 is a reference point between the GPRS and an external packet data network, the Gn 317 is an interface between two GSNs in the same PLMN, and the Gp 315 supports two packet radio services in different PLMNs. As an interface between nodes, the Gp 315 interface enables packet radio service network service support through regions served by the interoperable packet radio service PLMNs. A Gr 337 interface is an interface between the service packet radio service support node 110 and a home location register 307, and the Gs 319 interface is a mobile switch / visitor location with the service packet radio service support node 110. It is an interface between the registers 321, and the Iu 313 is considered as a reference point while being an interface between the RNSs and the core network. And, R 339 is a reference point between a non-ISDN compatible TE (tunnel end point) and MT, and typically supports a reference serial interface. The TE (tunnel end point) may be a mobile station. Um 341 is an interface between a mobile station and a portion of a GSM fixed network, and the Um 341 interface is a GSM network interface for providing packet radio service over the air to the mobile station. The MT portion of the mobile station is used to connect a packet radio service in GSM via the Um 341 interface. Uu 343 is an interface between the mobile station and the UMTS fixed network portion and is a UMTS network interface for providing packet radio service to the mobile station over the air. In FIG. 1, a portion indicated by a dotted line between components is a signal interface, and a portion indicated by a solid line is a signal and data transfer interface.

Constructing and updating the IP address and the temporary mapping table in the GGGSN of the gateway wireless packet service support node of the present invention, the method for constructing and updating the IP address and the temporary mapping table may include a service wireless packet service support node (SGSN). There may be two cases of having network environment information and a home location register (HLR) having network environment information.

FIG. 2 is a diagram illustrating a procedure of constructing and updating an IP address and a temporary mapping table when a service radio packet service support node (SGSN) has network environment information. FIG. 2 will be described with reference to FIG. do.                     

SGSN 110 has a network database (DB) related to network configuration, and GGSN 308 manages IP addresses and temporary mapping tables. The SGSN 110 transmits the home location registerer 307 in step 201 or attempts to attach a packet service registration procedure (Attach) in step 201, or a map update general packet radio service location message (MAP_UPDATE_GPRS_LOCATION Message) in step 203. The map update general packet radio service location message is a message for notifying that the mobile station is serving, and may include a list of GGSNs connected to the mobile station, and is configured as shown in Table 1 below.

M: Mandatory, C: Conditional, O: Optional

That is, when the mobile station is connected to the home network, the SGSN 110 maps a list of GGSNs connected with the SGSN 110 itself in a network DB related to the network configuration to a general packet radio service location message (MAP_UPDATE_GPRS_LOCATION Message). And informs the home location register 307. Accordingly, the home location register 307 receives the map update generic packet radio service location message from the SGSN 110 and sets the IMSI values and IP addresses for mobile stations, i.e., subscribers, as shown in Table 2 below. In step 205, GGSNs connected to the SGSN 110, that is, GGSNs in the GGSN list, are transmitted through a MAP_NOTE_MS_PRESENT_FOR_GPRS message for packet radio service. The GGSNs that receive the MAP_NOTE_MS_PRESENT_FOR_GPRS message store the temporary value and the IP address among the components of the message received in step 206 in the mapping table.

FIG. 3 is a diagram illustrating a procedure of constructing and updating an IP address and a temporary mapping table when a service home location register (HLR) has network environment information. The second method will be described with reference to FIG. 3.

In the second case, SGSN 110 has a network DB constructed by the operator with information related to network configuration, GGSN 308 manages IP address and temporary value mapping table, and home location register 307 is SGSN. And information about the composition of the GGSNs.                     

The SGSN 110 transmits the home location registerer 307 in step 353 when the mobile station attempts a packet service registration procedure (Attach) in step 351 or when a routing update is performed, in step 353, the MAP_UPDATE_GPRS_LOCATION message. The map update general packet radio service location message, unlike the first method, does not include a list of GGSNs connected with it. If the serving SGSN 110 is an SGSN in the home network, the home location register 307 obtains a list of related GGSNs using the configuration information of the home location register 307 in step 355. In step 356, the temporary value and the IP address of the subscriber are transmitted to the GGSN 308 using the MAP_NOTE_MS_PRESENT_FOR_GPRS message shown in Table 2 above. Each of the GGSNs 308 receiving the MAP_NOTE_MS_PRESENT_FOR_GPRS message stores the temporary value and the IP address in a temporary / IP address mapping table.

FIG. 6 is a diagram illustrating a procedure of deleting an IP address corresponding to a specific IMSI from an IMSI and an IP address mapping table, which will be described with reference to FIG. 6.

The SGSN 110 deletes the information about the MS when the packet service detach request is requested from the MS in step 601, and transmits a MAP_PURGE_MS message to the HLR 307 in order to inform this in step 602. The HLR 307 obtains the corresponding GGSN List information in step 603 and transmits the MAP_NOTE_MS_PRESENT_FOR_GPRS message that does not include the private extension information in the corresponding GGSNs in step 604. The GGSN 308 checks whether there is a private extension for the IP address in the MAP_NOTE_MS_PRESENT_FOR_GPRS message, and if there is no private extension, the GGSN 308 deletes the IP address corresponding to the IMSI from the mapping table from the mapping table. The MAP_PURGE_MS message is configured as shown in Table 3 below.

5 is a flowchart illustrating a mapping table management method in a GGSN according to an embodiment of the present invention. A description with reference to FIG. 5 is as follows.

First, the GGSN 308 checks the reception state of the MAP_NOTE_MS_PRESENT_FOR_GPRS message in step 501. That is, when the MAP_NOTE_MS_PRESENT_FOR_GPRS message is received, the GGSN 308 proceeds to step 503 to detect the IP address and IMSI from the MAP_NOTE_MS_PRESENT_FOR_GPRS message, while not detecting the MAP_NOTE_MS_PRESENT_FOR_GPRS message. After detecting the IP address and IMSI, the process proceeds to step 505 to check whether the detected IMSI is in the IP address / IMSI mapping table. If the IMSI is not present in the IP address / IMSI mapping table, the process proceeds to step 507 and the detected IP address and IMSI are added. In step 509, the GGSN 308 checks whether there is a private extension for the IP address in the MAP_NOTE_MS_PRESENT_FOR_GPRS message. If there is a personal extension for the IP address, the GGSN 308 proceeds to step 511 to update the existing IP address with the detected IP address. If there is no personal extension, the GGSN 308 proceeds to step 513 and deletes the IP address corresponding to the IMSI from the mapping table from the mapping table. The private extension message for the IP address is shown in Table 4 below.

4 is a diagram illustrating a process of managing a temporary / IP address mapping table of a GGSN according to an embodiment of the present invention. A description with reference to FIG. 4 is as follows.

If the IP packet is received from the Internet in step 401, the GGSN 308 detects the IP address in step 403. If the IP address is detected, the GGSN 308 refers to the mapping table in step 405 to find a temporary value for the IP address. If the temporary value is found, the GGSN 308 transmits a routing information request signal MAP_SEND_GPRS_LOCATION for the GPRS to the HLR 307 in order to obtain the address of the serving SGSN 110 of the mobile station in step 407. Then, the HLR 307 transmits the address information of the SGSN 110 serving the mobile station corresponding to the temporary value to the GGSN 308 in the route information response message MAP_SEND_ROUTING_INFO_FOR_GPRS in step 409. Upon receiving this, the GGSN 308 performs the incoming procedure to the mobile station through the serving SGSN 110.

Meanwhile, in the detailed description of the present invention, specific embodiments have been described, but various modifications are possible without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined not only by the scope of the following claims, but also by the equivalents of the claims.

As described above, there is an advantage in that a fixed IP address and temporary mapping table construction for incoming IP packets can be automatically generated and updated without operator intervention.

Claims (8)

IP address / mobile address of a mobile communication system having a service packet radio service support node having a network database related to a network configuration, and a plurality of gateway packet radio service support nodes connected to the packet radio service support node with an IP address / temporary mapping table. In the method of automatically building a temporary mapping table, When the mobile station requests a packet service registration, the service packet radio service support node informing a home location register of a list of the gateway packet radio service support nodes; Sending, by the home location register, the temporary value and IP address for the mobile station to the gateway packet radio service support nodes; And automatically storing and storing the temporary value and the IP address of each gateway packet wireless service support node. The IP address and temporary mapping table of a mobile communication system according to claim 1, wherein the mobile station transmits to the home location register that the service packet radio service support node is serving the mobile station when the mobile station requests a packet service registration. Auto build method. The IP address and temporary mapping table of the mobile communication system are automatically transmitted by using the personal extension information of the MAP_NOTE_MS_PRESENT_FOR_GPRS message. How to build. The method of claim 3, wherein the personal extension information, A method for automatically constructing an IP address and a temporary mapping table of a mobile communication system, comprising a personal extension type, a length, an extension identifier, and an address. Service packet wireless service support node having information related to network configuration, gateway packet wireless service support node having IP address / temporary mapping table, service packet wireless service support node and gateway packet wireless service support node. A method of automatically constructing an IP address / temporary mapping table of a mobile communication system having a home location register having: Informing the home location register that the service packet radio service support node is serving the mobile station when the mobile station requests a packet service registration; The home location register refers to a list of gateway packet radio service support nodes connected to the service packet radio service support node serving the mobile station with reference to configuration information of the service packet radio service support node and the gateway packet radio service support node. Configuring and transmitting the IP address and the temporary value for the mobile station to the gateway packet radio service support nodes of the list; And each gateway packet radio service support node receives and stores an IP address and a temporary value for the mobile station. 6. The automatic IP address and temporary mapping table of the mobile communication system according to claim 5, wherein the message transmitted by the home location register to the gateway wireless packet service support nodes is transmitted using personal extension information of a MAP_NOTE_MS_PRESENT_FOR_GPRS message. How to build. The method of claim 6, wherein the personal extension information, A method for automatically constructing an IP address and a temporary mapping table of a mobile communication system, comprising a personal extension type, a length, an extension identifier, and an address. A method for automatically constructing an IP address / temporary mapping table of a gateway wireless packet service support node in a mobile communication system, If a message including an IP address and a temporary value is received from a home location register, checking whether the detected temporary value is in a mapping table; If the IP address and the temporary value are not present in the mapping table, adding the detected IP address and the temporary value, and if not, checking whether there is a personal extension element for the IP address in the message; And updating the detected IP address if the personal extension elements are present, and deleting the IP address in the mapping table if none of the personal extension elements are present.

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