Method for automatic making ip address and imsi mapping tabel in mobile communication system

Method for automatically establishing IP address and temporary mapping table of 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 for automatically updating an IP address and a temporary mapping table of a mobile communication system according to the first embodiment of the present invention;

3 is a flowchart illustrating a method for automatically updating an IP address and a temporary mapping table of 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 for managing an IP address/temporary value mapping table of a gateway wireless packet service support node according to an embodiment of the present invention, and FIG. A procedure diagram showing a method of deleting an IP address corresponding to a specific temporary value in the temporary value mapping table.

<backgroundart><p>To a method for managing an IP address and an International Mobile Subscriber Identity (IMSI; hereinafter referred to as temporary) of a European mobile communication system that provides a general packet radio service (GPRS), in particular, the IP address and a method for automatically updating a temporary mapping table.</p><p>UMTS (Universal Mobile Terrestrial System), which is a mobile communication system, is a system for performing third-generation mobile communication. The UMTS system supports a packet data service as well as a voice service, and supports high-speed data communication and video communication. Among the core networks of the UMTS system, a General Packet Radio Service (GPRS) network, which is a packet data domain, performs a packet data service. When a packet call is received using an IP packet in a mobile communication system that provides a packet data service, a Gate GPRS Support Node (GGSN) transmits the packet call according to the destination IP address included in the packet call. It is used to find a temporary mobile station to transmit. To this end, the gateway packet radio service network (GGSN) has an IP address for an arbitrary mobile station and includes a temporary IP address corresponding to the IP address and a temporary mapping table.</p><p>The IP address and temporary mapping table should be directly constructed and serviced by an operator. In this case, when the subscriber changes the IP address or the temporary value, the operator must directly update the gateway packet radio service support node (GGSN) network by accessing it.</p><p>As described above, there is a problem in that the operator must directly build the IP address and the temporary mapping table. In particular, when the subscriber changes the IP address and the temporary value during service by allocating the IP address and the temporary value to a specific subscriber, the operator directly corresponds There is a problem in that an IP address and a temporary mapping table must be updated by accessing the network. </p></backgroundart><abstractproblem><p>Accordingly, it is an object of the present invention to provide a method by which an operator can automatically create an IP address and a temporary mapping table without directly constructing it in a mobile communication system.</p><p>Another object of the present invention is to provide a method for automatically updating an IP address and a temporary value when an IP address and a temporary value are changed in a mobile communication system having an IP address and a temporary mapping table.</p><p>The present invention for achieving the above objects; IP address/ A method for automatically constructing a temporary mapping table, comprising: transmitting, by the service packet radio service support node, a list of gateway packet radio service support nodes to a home location register when a mobile station requests packet service registration; Transmitting the temporary value and the IP address for , to the gateway packet radio service supporting nodes, and each of the gateway packet radio service supporting nodes receiving and storing the temporary value and the IP address.</p><p>The present invention in order to achieve the above other object; Information related to the configuration of a service packet radio service support node having information related to network configuration, a gateway packet radio service support node having an IP address/temporary mapping table, a service packet radio service support node, and a gateway packet radio service support node In the method for automatically constructing an IP address/temporary mapping table of a mobile communication system having a home location register having a home location register, the method for automatically establishing a packet service registration request indicates that the mobile station is servicing the mobile station serviced by the service packet radio service support node. the process of notifying the home location register; The home location register refers to the service packet radio service support node and the configuration related information of the gateway packet radio service support nodes to obtain a list of gateway packet radio service support nodes connected to the service packet radio service support node serving the mobile station. configuring and transmitting the IP address and temporary value for the mobile station to the gateway packet radio service supporting nodes in the list, and each gateway packet radio service supporting node receiving and storing the IP address and temporary value for the mobile station It is characterized by the process of </p></abstractproblem>

<p>Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the accompanying drawings. It should be noted that in the following description, only the 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 obscure the gist of the present invention. Hereinafter, refer to 3GPP TS 29.002 v3.7.2 (2000-12) for the configuration of messages not described.</p><p>1 is a diagram schematically illustrating a packet radio service network for performing functions in an embodiment of the present invention.</p><p>First, a packet radio service support node (GSN: GPRS Support Node), which is a node supporting a packet radio service (GPRS), functions required to support a 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 . A Gateway GPRS Support Node (GGSN) 130 is a node connected by a packet data network because of the evaluation of a PDP (Packet Data Protocol) address. Here, the PDP address includes routing information for users to which Packet Switched (PS) is attached, and the routing information includes a current connection point of a mobile station (MS), that is, a service packet radio service support node (SGSN). It is used to tunnel N-PDUs to a connection point such as a Support Node (110). The gateway packet radio service support node 130 includes an IP address of each of the mobile stations for the tunneling, and an IP address and a temporary table having temporary values corresponding to the IP address. The gateway packet radio service support node 130 requests location information from a Home Location Register (HLR) 307 through the optical Gc 305 interface. The gateway packet radio service support node 130 is the first point of the PDN interconnection with the GSM PLMN supporting GPRS (that is, the Gi 309 reference point supported by the gateway packet radio service support node 130). will be. And, the function of the gateway packet radio service support node 130 is a function common to GSM and UMTS.</p><p>The service packet radio service support node 110 is a node that serves the mobile station. The service packet radio service support node 110 includes GSM (i.e., Gb(311) interface supported by the service packet radio service support node 110) and/or UMTS (i.e., the service packet radio service support node 110). 110) supports packet radio service for Iu (313) interface). 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 the activation of the PDP environment, the service packet radio service supporting node 110 establishes a PDP environment to be used for routing purposes together with the gateway packet radio service supporting node 130 to be used by the subscriber.</p><p>The functions of the service packet radio service support node 110 and the gateway packet radio service support node 130 may be combined in the same physical node or exist in different physical nodes. The service packet radio service support node 110 and the gateway packet radio service support node 130 include IP or other (at the operator's choice, 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 supporting node 110 and the gateway packet radio service supporting node 130 are in different PLMNs, the service packet radio service supporting node 110 and the gateway packet radio service supporting node 130 are Gp (315) are interconnected through an interface. The Gp (315) interface not only provides a Gn (317) interface function, but also has a security function required for PLMN internal communication. And the security function is based on mutual agreement between operators.</p><p>The service packet radio 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 exchange/visitor location register 321 through the Gs 319 interface. The service packet radio service support node 110 interfaces with the GSM-SCF for selective CAMEL (Customized Applications for Mobile Network Enhanced Logic) control. Depending on the results resulting from the CAMEL interaction, the SESSION and packet data transfers generally proceed.</p><p>In addition, the Ga (323) interface shown is a CDR (Call Detail Record) transmission device (eg, a service packet radio service support node 110 or a gateway packet radio service support node 130) and a CDR reception function (CGF) 325 performs a data collection interface between them. 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 It is an interface between 130 and the home location register 307 . And, the Gd (329) interface is a short message service-gateway mobile switch (SMS-GMSC: Short Message Service Gateway MSC) 331, the service packet radio service support node 110 and the short message service-interaction mobile switch ( SMS-IWMSC is an interface between Short Message Service Interworking MSCs (MSCs) 331 and Gf 333 is an 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 across areas serviced by the interoperating packet radio service PLMNs. The Gr(337) interface is the interface between the service packet radio service support node 110 and the home location register 307, and the Gs(319) interface is the service packet radio service support node 110 and the mobile switch/visitor location. It is an interface between the registers 321, and the Iu 313 is an interface between RNSs and a core network and is considered as a reference point at the same time. And, R 339 is a reference point between a non-ISDN compliant TE (tunnel endpoint) and an MT, and typically supports a reference serial interface. The TE (tunnel endpoint) may be a mobile station. Um 341 is an interface between a mobile station and a GSM fixed network part, and the Um 341 interface is a GSM network interface for providing a packet radio service to the mobile station over the air. The MT portion of the mobile station is used to access packet radio services in GSM via the Um 341 interface. Uu 343 is an interface between a mobile station and the UMTS fixed network part, and is a UMTS network interface for providing a packet radio service to the mobile station over the air. Further, in FIG. 1, a portion indicated by a dotted line between the components is a Signaling Interface, and a portion indicated by a solid line is a Signaling and Data Transfer Interface.</p><p>The method of constructing and updating an IP address and a temporary mapping table in the gateway radio packet service support node (GGSN) of the present invention, and the method of constructing and updating the IP address and the temporary mapping table is a service radio packet service support node (SGSN) There may be two cases: a case in which network environment information is provided and a case in which the home location register (HLR) has network environment information.</p><p>FIG. 2 is a diagram illustrating a procedure for establishing and updating an IP address and a temporary mapping table when a service radio packet service support node (SGSN) has network environment information. The first method is described with reference to FIG. 2 do.</p><p>The SGSN 110 has a network database (DB) related to network configuration, and the GGSN 308 manages an IP address and a temporary mapping table. The SGSN 110 transmits a MAP update general packet radio service location message (MAP_UPDATE_GPRS_LOCATION Message) to the home location register 307 in step 203 when the mobile station attempts a packet service registration procedure (Attach) in step 201 or when routing is updated. The map update general packet radio service location message is a message for notifying that the mobile station is being serviced, and may include a list of GGSNs connected to the mobile station, and is configured as shown in Table 1 below.</p><p><tables id="1"><img file="KR100790095B1_D0001.tif" /></tables></p><p>M :Mandatory, C:Conditional, O:Optional</p><p>That is, when the mobile station is connected to the home network, the SGSN 110 lists the GGSNs connected to the SGSN 110 in the network DB related to the network configuration in the map update 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 an IMSI value and an IP address for a mobile station, that is, a subscriber, as shown in Table 2 below. In step 205, the MAP notification mobile station presence message for packet radio service (MAP_NOTE_MS_PRESENT_FOR_GPRS Message) is transmitted to the GGSNs connected to the SGSN 110, that is, to the GGSNs in the GGSN list. The GGSNs that have received the MAP_NOTE_MS_PRESENT_FOR_GPRS message store temporary values and IP addresses among the elements of the received message in a mapping table in step 206 .</p><p><tables id="2"><img file="KR100790095B1_D0002.tif" /></tables></p><p>FIG. 3 is a diagram illustrating a procedure for establishing 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.</p><p>In the second case, the SGSN 110 has a network DB established by the operator with information related to network configuration, the GGSN 308 manages the IP address and temporary value mapping table, and the home location register 307 is the SGSN and information related to the composition of GGSNs.</p><p>The SGSN 110 transmits a map update general packet radio service location message (MAP_UPDATE_GPRS_LOCATION Message) to the home location register 307 in step 353 when the mobile station attempts a packet service registration procedure (Attach) in step 351 or updates routing. Unlike the first method, the map update general packet radio service location message does not include a list of GGSNs connected to it. If the serving SGSN 110 is an SGSN in the home network, the home location registrar 307 uses the configuration information of the home location registrar 307 to obtain a list of related GGSNs in step 355 . In step 356, the temporary value and IP address for 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.</p><p>6 is a diagram illustrating a procedure for 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.</p><p>The SGSN 110 deletes information about the MS when a packet service detach request is requested from the MS in step 601 , and transmits a MAP_PURGE_MS message to the HLR 307 to notify it 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 private extension information to 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. If there is no private extension, the GGSN 308 deletes the IP address corresponding to the IMSI from the mapping table. The MAP_PURGE_MS message is configured as shown in Table 3 below.</p><p><tables id="3"><img file="KR100790095B1_D0003.tif" /></tables></p><p>5 is a flowchart illustrating a mapping table management method in GGSN according to an embodiment of the present invention. Hereinafter, it will be described with reference to FIG.</p><p>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 the IMSI from the MAP_NOTE_MS_PRESENT_FOR_GPRS message, but does not detect it if the MAP_NOTE_MS_PRESENT_FOR_GPRS message is not received. After detecting the IP address and IMSI, the process proceeds to step 505 to determine whether the detected IMSI is in the IP address/IMSI mapping table. If the IMSI is not in the IP address/IMSI mapping table, the process proceeds to step 507 and adds the detected IP address and the IMSI. If there is, the process proceeds to step 509. 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 private extension for the IP address, the GGSN 308 proceeds to step 511 and updates the existing IP address with the detected IP address. And if there is no personal extension, the GGSN 308 deletes the IP address corresponding to the IMSI from the mapping table in step 513 from the mapping table. The personal extension message for the IP address is shown in Table 4 below.</p><p><tables id="4"><img file="KR100790095B1_D0004.tif" /></tables></p><p>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. Hereinafter, it will be described with reference to FIG.</p><p>When an IP packet is received from the Internet network in step 401 , the GGSN 308 detects an IP address in step 403 . If the IP address is detected, the GGSN 308 searches for a temporary value for the IP address by referring to the mapping table in step 405 . When 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 step 407 to obtain the address of the serving SGSN 110 of the mobile station. Then, in step 409, 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 a routing information response message (MAP_SEND_ROUTING_INFO_FOR_GPRS). Upon receiving this, the GGSN 308 transmits the incoming call to the mobile station through the serving SGSN 110, and performs an incoming procedure.</p><p>Meanwhile, although specific embodiments have been described in the detailed description of the present invention, 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 and should be defined by the claims described below as well as the claims and equivalents.</p>

<p>As described above, there is an advantage in that a fixed IP address for incoming IP packets and a temporary mapping table can be automatically created and updated without an operator's intervention.</p>