KR100802099B1 - Method and system for the receiving call processing of the packet service using the domain information - Google Patents

Abstract

A packet service receiving call processing method using domain information and a system are provided to use a destination address system composed of a receiving terminal identifier and domain information instead of a complex IP(Internet Protocol) address allocated to a receiving terminal, thereby offering a more efficient packet service call processing method of the receiving terminal. A packet service request message is received from an external packet data network(S210). The packet service request message consists of a receiving terminal identifier and domain information corresponding to a packet call processing device. An IP address corresponding to the receiving terminal identifier is obtained(S215). A packet service is provided to a receiving terminal corresponding to the obtained IP address(S220-S245).

Description

Method and System for the Receiving Call Processing of the Packet Service Using the Domain Information}

1 is a block diagram of a WCDMA packet service system according to the present invention;

2 is a flowchart illustrating a method of processing a packet incoming call according to the present invention.

3 is a block diagram of an IP address information database according to the present invention;

4 is a block diagram showing a packet incoming call processing apparatus according to the present invention;

* Explanation of symbols on the main parts of the drawing

130: Serving GPRS Support Node (SGSN)

150: Gateway GPRS Support Node (GGSN)

165: IP address information database

170: external packet data network

The present invention relates to a method and system for processing a packet service incoming call using domain information, and more particularly, to a destination address including domain information and a destination terminal identifier in a mobile communication system connected to an external packet data network to provide a packet service. The present invention relates to a packet service call processing method and system of a called terminal using a scheme.

Components for providing packet services in a wideband code division multiple access (WCDMA) network generally include a core network, a universal terrestrial radio access network (UTRAN), and a mobile terminal.

In particular, the core network is a packet switched area consisting of a circuit switched domain consisting of network elements providing a circuit switched service and a packet switching area consisting of network elements related to a packet service according to the characteristics of a service provided. Domain).

Core network components constituting the packet switched area may include a Gateway GPRS Support Node (GGSN), a Serving GPRS Support Node (SGSN), and a GPRS Period IP network.

Here, the GGSN has an interface with an external packet data network and performs a function of transmitting a packet received from the external packet data network to an appropriate SGSN.

At this time, all packets received at the GGSN include the IP address of the called terminal.

The GGSN refers to an internal database or a separate external database to obtain an International Mobile Subscriber Identity (IMSI) value corresponding to the IP address of the called terminal.

The GGSN obtains the routing path of the SGSN from the home location register through the obtained IMSI value, and then transmits the received packet to the corresponding SGSN.

That is, according to the prior art, the mobile communication service provider had to basically assign a static IP to the destination terminal subscribed to the packet service.

The GGSN obtained the IMSI value of the called terminal by using the static IP address included in the received packet, and could perform the incoming call processing for the IMSI.

In addition, in the related art, when sending a packet from a calling terminal connected to an external packet data network, a static IP address of the called terminal must be set.

As a result, it is very inconvenient for a user to memorize and set a complicated IP address according to an IP address scheme (for example, IPv4) currently used and a widely used IP address scheme (for example, IPv6).

In order to solve the problems of the prior art as described above, the present invention provides a packet service call processing of a called terminal in a packet call processing apparatus connected to an external packet data network to provide a packet service. It is an object of the present invention to provide a packet service call processing method of a called terminal more efficiently by using a destination address system composed of domain information and called terminal identifier instead of an IP address.

Other objects of the present invention will be readily understood through the following description of the embodiments.

In order to achieve the above object, according to a preferred embodiment of the present invention, in a packet call processing apparatus connected to an external packet data network to provide a packet service in a method for providing a packet service call processing of a terminating terminal (a) receiving a packet service request message from the external packet data network, wherein the packet service request message includes domain information corresponding to the packet call processing apparatus and a called terminal identifier; (b) obtaining an IP address corresponding to the called terminal identifier; And (c) providing a packet service to a called terminal corresponding to the obtained IP address.

According to another preferred embodiment of the present invention, in a packet service call processing apparatus of a called terminal connected to an external packet data network, a message transceiver for receiving a packet service request message from the external packet data network, wherein the packet A service request message includes domain information corresponding to the packet call processing apparatus and a called terminal identifier; An IP address obtaining unit obtaining at least one of a static IP address and a dynamic IP address corresponding to the called terminal identifier; An IP address information database for maintaining the static IP address and the dynamic IP address corresponding to the called terminal identifier; And a main control unit for providing a packet service to the destination terminal by using any one of the obtained static IP address and dynamic IP address.

The above objects, features and advantages will become more apparent from the following detailed description taken in conjunction with the accompanying drawings. First of all, in adding reference numerals to the components of each drawing, it should be noted that the same components have the same number as much as possible even if displayed on different drawings.

Hereinafter, exemplary embodiments of a packet service incoming call processing method and system using domain information according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a system configuration diagram for providing a WCDMA packet service according to the present invention.

In order to help the understanding of the present invention, in the following description, a general packet incoming call processing procedure performed in a WCDMA network will be described with reference to the drawings. However, the present invention is not limited thereto. Those skilled in the art will appreciate that they may be included in the category.

Here, packet incoming call processing refers to a call processing procedure for a packet service performed on the side of a called terminal.

That is, packet incoming call processing refers to a series of control procedures for establishing a communication channel for providing a packet service between a WCDMA network and a called terminal.

As shown in FIG. 1, the WCMDA packet network 100 is largely referred to as a core network (hereinafter, referred to as' CN (Core Network) ', 110), a UTRAN (Universal Terrestrial Radio Access Network) 120, and a mobile terminal (hereinafter,' UE 105 '.

The UTRAN 104 consists of one or more Radio Network Sub-Systems (RNS), and one Radio Network Sub-System (RNS) includes one Radio Network Controller (RNC) and at least one It consists of a base station.

The radio network control station may transmit and receive control messages related to resource allocation, modification, and release of the UE 105 through a radio resource control (RRC) protocol.

In accordance with the present invention, core network 110 may include SGSN 130, GGSN 150, home location register 140, GPRS backbone IP network 160, and IP address information database 165. Can be.

In the figure, although the IP address information database 165 is shown as an external device of the GGSN 150, it should be noted that it may be included inside the GGSN 150.

The present invention proposes a packet service call processing method of a called terminal more efficiently by using a destination address system composed of domain information and called terminal identifier. Such a method can be implemented through a packet incoming signal processing apparatus.

In the following description, a packet incoming call processing device is described as a GGSN 150 for convenience of description, but is not necessarily limited thereto.

In general, the CN 110 is largely divided into a circuit switched domain and a packet switched domain according to the type of service provided to the mobile terminal 105.

For example, the circuit switched area may include a mobile switching center (MSC) that performs call processing, a visitor location register (VLR) that stores location information of a mobile terminal, and a circuit that provides access to a public telephone network. It includes a switching gateway (Gateway MSC: GMSC) and provides circuit switching services represented by voice calls.

On the other hand, the packet switching area is a gateway GPRS support that provides access to a Serving General Packet Radio Service (SGSN) Suppot Node (SGSN) 130 serving as an exchange for packet services, and an external packet data network 170. Node, 150, and Home Location Register (HLR) 140, which stores the subscriber's master information and routing information for CN 110 internal devices.

In general, the GGSN 150 has an interface with the GPRS period IP network 160 and the external packet data network 170.

In addition, the GGSN 150 may acquire the routing information corresponding to the called terminal as well as perform the charging and authentication procedure in conjunction with the home location register 140.

In particular, all data and control messages transmitted and received between SGSN 130 and GGSN 150 must pass through GPRS period IP network 160.

The function of the SGSN 130 is located between the UTRAN 120 and the GGSN 150 and performs radio resource allocation, subscriber location registration processing, authentication processing, and call processing functions for packet services.

In the following description, when the UE 105 is a called terminal, a procedure for processing the packet service request message (eg, the PDP PUD 197) transmitted by the content providing unit 190 is shown in FIG. This will be described with reference.

In general, in order for the WCDMA system to provide the UE 105 with the packet data received from the external packet data network 170, an IP address should be assigned to the UE 105 by default.

The GGSN 150 maintains the allocated IP address in an internal database, thereby transmitting and receiving a packet data protocol packet data unit (hereinafter, referred to as a 'PDP PDU (Packet Data Protocol Packet Data Unit)'). 197 may be delivered to the desired destination (eg, UE 105).

Here, the PDP PDU 197 includes a source and destination IP address.

The content provider 190 sets its IP address as the source IP address and sets the IP address assigned to the UE 105 as the destination address, and then transmits the PDP PDU 198 to the external packet data network 170. do.

When the GGSN 150 receives the PDP PDU 197 through the external packet data network 170, the destination terminal identifier (eg, IMSI (International Mobile Subscriber Identity) corresponding to the destination IP address included in the PDP PDU 197) is received. The subscriber's telephone number) from the IP address information database 165.

Thereafter, the GGSN 150 transmits a routing information request message to the home location register 140 to obtain location information corresponding to the obtained called terminal identifier.

When the home location register 140 receives the routing information request message, the home location register 140 extracts routing information corresponding to the called terminal identifier.

Here, the routing information may include the IP address of the SGSN 130 that provides packet service to a routing area (RA) that the UE 105 last registered.

In general, the UE 105 provides the home location register 140 with routing area information that is changed in real time through a routing area update procedure.

The home location register 140 transmits a routing information response message including the extracted routing information to the GGSN 150.

At this time, the GGSN 150 transmits the PDP PDU 197 to the SGSN 130 corresponding to the received routing information through the GPRS tunneling protocol (hereinafter, referred to as 'GPRS Tunneling Protocol').

Here, the GTP is a protocol defined for communication between the SGSN 130 and the GGSN 150.

Upon receiving the PDP PDU 197, the SGSN 130 receives a packet data protocol (hereinafter, referred to as a 'packet data protocol') for establishing a packet call to the UE 105 (PDP Context Activation Procedure). Do this.

The SGSN 130 may establish a wired / wireless communication channel for providing a packet service called by the content provider 190 to the UE 105 by performing the PDP context activation procedure.

Here, the wired / wireless communication channel is a wired channel between the SGSN 130 and the UTRAN 120 as well as a GTP tunnel established between the SGSN 130 and the GGSN 150 and between the UTRAN 120 and the UE 105. It includes a wireless channel.

Through the established wired / wireless communication channel, the UE 105 may receive a packet service called by the content provider 190.

However, there is a problem that it is not easy for the calling terminal user to accurately remember the IP address assigned to the called terminal.

For example, as the number of Internet users increases, the length of the IP address is changing from 32 bits according to the Internet Protocol Version 4 (IPv4) scheme to 128 bits according to the Internet Protocol Version 6 (IPv6) scheme.

In general, a mobile communication service provider may assign a static IP (Static IP) used in the WCDMA network 100 to its packet service subscriber.

That is, components of the WCDMA packet service network (including, for example, SGSN 130 and GGSN 150) may use the static IP to transmit the PDP PDU 197 received from the external packet data network 170 to the WCDMA network. You can route within 100.

The present invention can solve the problem of the above complicated IP address system by using a new destination address system composed of domain information and destination terminal identifier, not IP address.

The domain information according to the present invention means a domain corresponding to the GGSN 150 having a direct interface with an external packet data network.

For example, when the domain information of the KTF WCDMA network is 'hsdpa.ktf.com' and the called terminal identifier (for example, may be the telephone number of the called terminal) is '01012345678', the destination address system according to the present invention is 'hsdpa'. .ktf.com / ~ 01012345678 '

At this time, the public domain name server 180 connected to the external packet data network 170 maintains an IP address corresponding to 'hsdpa.ktf.com' included in the destination address system in advance. must do it.

That is, the mobile operator transmits the domain corresponding to the first access point (eg, GGSN 150) from the external packet data network 170 to its network and the IP address corresponding to the domain to the public domain name server 180. You must register.

If the external packet data network 170 receives the PDP PDU 198 having the destination address 'hsdpa.ktf.com/~01012345678' from the content providing unit 190, 'hsdpa.ktf.com' Obtain an IP address corresponding to the public domain name server 180.

Thereafter, the external packet data network 170 transmits the received PDP PDU 198 to the obtained IP address.

Here, reference numeral 198 and reference numeral 197 may be the same packet.

The GGSN 150 extracts the telephone number '01012345678' of the called terminal from the destination address of the received PDP PDU 197.

Thereafter, the GGSN 150 obtains from the IP address information database 165 a static IP address corresponding to the extracted telephone number of the called terminal.

In addition, the GGSN 150 obtains routing information of the SGSN 130 to process the PDP PDU 197 from the home location register 140 by using the extracted telephone number of the called terminal.

In this case, the routing information may be an IP address of the SGSN 130.

The GGSN 150 transmits a packet data unit notification request (PUD) notification request (SGD) message to the SGSN 130 to notify the reception of the PDP PDU 197 through the GPRS period IP network 160.

Since the call processing procedure related to the packet service performed by the SGSN 130 is not directly related to the spirit disclosed by the present invention, it will be omitted in the description of this drawing.

2 is a flowchart illustrating a packet incoming signal processing method according to the present invention.

As shown in FIG. 2, when the GGSN 150 receives the PDP PDU from the external packet data network 170 (S210), the GGSN 150 obtains an IP address of the called terminal (S215).

Here, the IP address of the called terminal may be a static or dynamic IP address obtained by using the called terminal identifier included in the PDP PDU.

The GGSN 150 transmits a routing information request message including the terminal identification information (eg, IMSI) to the home location register 140 to obtain routing information of the SGSN to process the received PDP PDU (S220).

The home location register 140 transmits a routing information response message including the IP address of the SGSN corresponding to the called terminal identifier to the GGSN 150 (S225).

The GGSN 150 transmits a PDU Notification Request Message to the SGSN 130 at which the IP address of the received SGSN is the destination (S230).

SGSN 130 transmits a Request PDP Context Activation message to UE 105.

When SGSN 130 receives the response message to the PDP context activation request message from UE 105, SGSN 130 performs a PDP context activation procedure (S245).

3 is a block diagram of an IP address information database according to the present invention.

As shown in FIG. 3, the IP address information database 165 includes a subscriber information table 305 consisting of at least one subscriber record 350 and a dynamic IP address table 360 consisting of at least one dynamic IP record 390. ) May be included.

The subscriber record 350 may include a terminal identification number 310, an IP address flag 320, a static IP address 330, and a dynamic IP address 340.

The dynamic IP record 390 can include an available status flag 370 and a spare IP address 380.

The terminal identification number 310 is a unique identification number of the mobile terminal assigned from the mobile operator in the service subscription step.

For example, the unique identification number may be an international mobile terminal subscription identifier (hereinafter referred to as 'International Mobile Subscriber Identity').

The static IP address 330 is an IP address assigned to each terminal identification number 310 in the packet service subscription step and has a unique value in the WCDMA network 100.

The dynamic IP address 340 is an IP address dynamically allocated by the GGSN 150 when a packet incoming call is requested to the destination terminal to which the static IP address 330 is not assigned.

Here, it is apparent to those skilled in the art that the dynamic IP address 340 should also be assigned a unique value within the WCDMA network 100.

The IP address flag 320 is a status field indicating whether a static IP address 330 corresponding to the terminal identification number 310 has been previously assigned.

The availability status flag 370 may have a length of one bit (eg, binary '0' may mean 'not available' and binary '1' may mean 'available', respectively) This field indicates whether the spare IP address 380 included in the dynamic IP record is available.

Here, the reserved IP address 380 means a dynamic IP address that can be assigned by the GGSN 150.

If the value of the available status flag 370 included in the dynamic IP record 390 is '1', the GGSN 150 may allocate the reserved IP address 380.

On the other hand, if the value of the available status flag 370 is set to '0', the GGSN 150 may not allocate the reserved IP address 380 as a dynamic IP address.

As a result, the GGSN 150 sequentially orders the dynamic IP record 390 until it finds a dynamic IP record with the value of the availability status flag 370 equal to '1', if the allocation of the dynamic IP address 340 is required. Search with.

If the value of the available status flag 370 is found to be a dynamic IP record 390, the GGSN 150 replaces the spare IP address 380 included in the dynamic IP record 390 with the dynamic IP address. (340).

For example, the IP address flag 320 field may have a length of 2 bits (Bits), and the initial value has '00'.

In this case, when the value of the IP address flag 320 is '11', it means that a static IP address is allocated.

If the IP address flag 320 is set to '01', it means that the static IP address 330 corresponding to the terminal identification number 310 is not assigned.

That is, when the value of the IP address flag 320 corresponding to the terminal identification number 310 is '01', the GGSN 150 obtains a reserved IP address 380 from the dynamic IP table 360. The value of the IP address flag 320 is '10', where the binary number '10' means that the dynamic IP address has been allocated, and the value of the available status flag 370 is changed to '0'.

If the incoming call service for the terminal identification number 310 is completed, the GGSN 150 changes the value of the IP address flag 320 to '01' and the available state flag 370 to '0'. .

That is, when the packet service is completed, the GGSN 150 performs a procedure of retrieving the pre-assigned dynamic IP address.

As a result, the GGSN 150 may assign the retrieved dynamic IP address to the called terminal which is subsequently requested for the incoming call.

4 is a block diagram showing a packet incoming signal processing apparatus according to the present invention.

As shown in FIG. 4, the packet incoming call processing apparatus 410 includes a message transceiver 420, a main controller 430, a routing information obtainer 440, a dynamic IP address allocator 450, and a static IP address. The acquisition unit 460 and the IP address information database 470 may be included.

Here, the IP address information database 470 may include a subscriber information table 480 and a dynamic IP address table 490.

The subscriber information table 480 includes control fields (eg, IP address flags 320) for controlling IP address allocation status as well as terminal identification numbers, static IP addresses, and dynamic IP addresses assigned to packet service subscribers of the WCDMA network 100. Keep)).

The dynamic IP address table 490 maintains information on all available dynamic IP addresses, and the dynamic IP address allocator 450 may recognize whether the corresponding dynamic IP address is allocated through the available status flag 370. .

The message transceiver 420 has an interface with the external packet data network 170, the SGSN 130, and the home location register 150, and provides the received control message and the data message to the main controller 430.

The main controller 430 may be a corresponding lower device (eg, routing information acquisition unit 440, dynamic IP address assignment unit 450, and IP address resolution unit 460) according to the type of the message received from the message transmission / reception unit 420. It may include a) to transmit a control signal.

In addition, the main controller 430 may also generate a control message using the information processed by the lower device, and then transmit the generated control message to the message transceiver 420.

The routing information acquisition unit 440 performs a function of obtaining routing information of the called terminal from the home location register 150.

That is, the routing information acquisition unit 440 obtains, from the home location register 150, the IP address of the SGSN 130 to process the packet received from the external packet data network 170 according to the control signal of the main control unit 430. do.

According to the present invention, the IP address obtaining unit includes a dynamic IP address allocating unit 450 and a static IP address obtaining unit 460.

If the static IP address is not assigned to the called terminal, the dynamic IP address allocator 450 performs a function of allocating a dynamic IP address by referring to the IP address information database 470.

In addition, when the packet service to the called terminal is completed, the dynamic IP address assignment unit 450 also performs a function of recovering the allocated dynamic IP address.

The static IP address obtaining unit 460 decodes the destination address included in the packet service request message (eg, the PDP PDU 197 of FIG. 1) and performs a function of extracting the called terminal identification number.

In addition, the static IP address obtaining unit 460 obtains a static IP address corresponding to the extracted called terminal identification number with reference to the subscriber information table 480.

If the static IP address acquisition fails, the static IP address acquisition unit 460 transmits a static IP address acquisition failure signal to the main controller 430.

When the main controller 430 receives the static IP address acquisition failure signal, the main controller 430 transmits a control signal for instructing the dynamic IP address allocation to the dynamic IP address allocator 450.

Preferred embodiments of the present invention described above are disclosed for purposes of illustration, and those skilled in the art will be able to make various modifications, changes, and additions within the spirit and scope of the present invention. Additions should be considered to be within the scope of the following claims.

As described above, the present invention provides a method for providing packet service call processing of a called terminal in a packet call processing apparatus connected to an external packet data network and providing a packet service, wherein a domain instead of a complex IP address assigned to the called terminal is provided. By using a destination address system consisting of information and a destination terminal identifier, there is an advantage to provide a packet service call processing method of the destination terminal more efficiently.

Claims (12)

A method for providing packet service call processing of a called terminal in a packet call processing apparatus connected to an external packet data network and providing a packet service, the method comprising: (a) receiving a packet service request message from the external packet data network, wherein the packet service request message includes domain information corresponding to the packet call processing apparatus and a called terminal identifier; (b) obtaining an IP address corresponding to the called terminal identifier; And (c) providing a packet service to a called terminal corresponding to the obtained IP address Packet service call processing providing method of a called terminal comprising a. The method of claim 1, In step (b), (b1) obtaining a static IP address corresponding to the called terminal identifier; And (b2) obtaining a dynamic IP address if the static IP address acquisition fails Packet service call processing providing method of a called terminal comprising a. The method of claim 2, The static IP address is a packet service call processing providing method of the destination terminal, characterized in that the IP address fixedly assigned corresponding to the destination terminal identifier. The method of claim 2, And the dynamic IP address is reused when the packet service is terminated. The method of claim 1, The method of claim 1, wherein the destination terminal maintains the domain information and the IP address corresponding to the domain information in a domain name server connected to the external packet data network before performing the step (a). A packet service call processing apparatus of a called terminal connected to an external packet data network, A message transceiver for receiving a packet service request message from the external packet data network, wherein the packet service request message includes domain information corresponding to the packet call processing apparatus and a called terminal identifier; An IP address obtaining unit obtaining at least one of a static IP address and a dynamic IP address corresponding to the called terminal identifier; An IP address information database for maintaining the static IP address and the dynamic IP address corresponding to the called terminal identifier; And A main control unit that provides a packet service to the called terminal using any one of the obtained static IP address and dynamic IP address. Packet service call processing apparatus of a called terminal comprising a. The method of claim 6, The device is connected to a home location register that maintains location information of the called terminal. And a routing information obtaining unit which obtains routing information of the packet service request message from the home location register using the called terminal identifier. The method of claim 6, The IP address information database includes a subscriber information table in which an IP address allocated to each called terminal is maintained and a dynamic IP address table in which dynamic IP address information assignable by the device is maintained. The method of claim 8, And the subscriber information table includes at least one of a terminal identification number field, an IP address flag field, a static IP address field, and a dynamic IP address field. The method of claim 6, The IP address obtaining unit, A static IP address obtaining unit obtaining a static IP address corresponding to the called terminal identifier; And And a dynamic IP address allocator for obtaining a dynamic IP address corresponding to the called terminal identifier. The method of claim 9, And a packet service call processing apparatus of the called terminal, which obtains one of the static IP address and the dynamic IP address corresponding to the called terminal identifier from the IP address information database according to the value of the IP address flag field. The method of claim 8, The dynamic IP address table is composed of at least one dynamic IP record, and the dynamic IP record is a packet service call processing of a called terminal including an available status flag field and a spare IP address field indicating whether the dynamic IP record is available. Device.

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