KR20040011806A - Packet call forwarding method in mobile communication system - Google Patents

Abstract

PURPOSE: A packet call forwarding method in a mobile communication system is provided to transfer all received calls to a URL or specific server address registered in an HLR(Home Location Register) or an arbitrary MS(Mobile Station) as a terminating subscriber makes all terminated calls forwarded to his IP address in the case of making a request for a packet terminating call from the Internet to an IMT subscriber terminal in an advanced GPRS(General Packet Radio Service) network. CONSTITUTION: An advanced GPRS network is comprised of MSs(10,11), RNCs(Radio Network Controllers)(20,21), HLRs(30,31), SGSNs(Servicing GPRS Support Nodes)(40,41), a GGSN(Gateway GPRS Service Node)(50), and the Internet(60). If packet data are received to the GGSN(50) from the Internet(60), the GGSN(50) extracts a terminating IP address and obtains an IMSI(International Mobile Subscriber Identity) using the extracted IP address. Then the GGSN(50) transmits the first routing information request data to request the first HLR(30) to send an SGSN address at which the location of an associated subscriber is registered. The first HLR(30), receiving the first routing information request data, checks the IMSI and a subscriber state through the received data. At this moment, the first HLR(30) judges whether a call forwarding service has been established in subscriber information. In case that the call forwarding service has been established, the first HLR(30) transmits the first routing information data to the GGSN(50) with forwarding data.

Description

Packet call forwarding method in mobile communication system

The present invention relates to a packet call switching method in a mobile communication system. In particular, when a call request for an incoming packet is registered, all calls received to its own IP address are forwarded and registered so that all calls received from the Internet are registered to the HLR. In addition, the present invention relates to a packet call switching method in a mobile communication system which is configured to transfer a call to a specific server address or any other mobile communication terminal.

In general, the next generation General Packet Radio Service (GPRS) network has a mobile station (MS) 10, a radio network controller (RNC) 20, and a home location register (HLR) 30, as shown in FIG. ), A Serving GPRS Support Node (SGSN) 40, a Gateway GPRS Service Node (GGSN) 50, and an Internet network 60. The RNC 20 is a wireless network control system. The HLR 30 is a database that manages mobile subscribers, and stores all subscriber information, manages location information (circuit / packet) for incoming routing, and the SGSN 40 is a GPRS service support system. It interworks with the corresponding RNC 20 through the Iu interface and supports the GPRS service of the MS 10 by interworking with the corresponding GGSN 50 through the GN interface, and the GGSN 50 interworks with an external packet switching network. By interworking with the relevant SGSN (40) to the IP backbone network through the GN interface Per gives support MS (10) and to transmit the packet data service of the external packet networks. In addition, it supports the transmission of packet data service between the MS 10 and the external packet network by interworking with the SGSN 40 to the IP backbone network through the Iu interface. In addition, the Iu interface refers to the interface between the RNC 20 and the core network (Core Network), the GN interface refers to the interface between the SGSN 40 and the GGSN 50 in the same operator network.

In the above-described next-generation GPRS network, when a packet incoming call is requested from an internet network 60 to an arbitrary mobile communication terminal, the call cannot be transferred to another terminal or an address. Here, call forwarding means that when a call is made to a subscriber of a mobile communication terminal subscribed to a call forwarding service, a call is received at another predetermined URL address or a specific server address or any other mobile communication terminal.

Therefore, when the Internet network 60 requests a packet forwarding signal to any mobile communication terminal, a service for requesting a call forwarding to another terminal or address desired by the called subscriber is required.

The present invention has been made to solve the above-mentioned general problems, and an object thereof is to allow a called subscriber to switch all calls to his or her IP address when requesting packet incoming from the Internet network to an IMT subscriber terminal in a next generation GPRS network. All calls registered and received are for forwarding to a URL address or a specific server address or any other mobile terminal registered with the HLR.

1 illustrates a typical next generation GPRS network.

Figure 2 illustrates a next generation GPRS network in accordance with the present invention.

3 is a scenario illustrating a packet call switching method in a mobile communication system according to an embodiment of the present invention.

* Description of the symbols for the main parts of the drawings *

10, 11: MS (Mobile Station)

20, 21: RNC (Radio Network Controller)

30, 31: HLR (Home Location Register)

40, 41: Serving GPRS Support Node (SGSN)

50: Gateway GPRS Service Node (GGSN)

60: Internet network

Packet call switching method in a mobile communication system according to an embodiment of the present invention for achieving the above object comprises the steps of: receiving packet data from the Internet network and requesting first routing information data; Determining whether a corresponding call forwarding service is set by a corresponding subscriber according to the first routing information data request; Transmitting first routing information data including forwarding information data according to a determination result of whether the forwarding service is set; And setting an incoming packet call according to the forwarding information data.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Next-generation GPRS network according to an embodiment of the present invention, as shown in Figure 2, MS (10, 11), RNC (20, 21), HLR (30, 31), SGSN (40, 41) and , GGSN (50) and the Internet network 60, the GGSN (50) receives the packet data (PDP (Packet Data Protocol) PDU (Packet Data Unit) (PDU) from the Internet network 60 If a subscriber number (hereinafter referred to as "International Mobile Subscriber Identity") is obtained from an IP address and the first routing information request data is transmitted to the HLR1 30, the subscriber requests a SGSN address where the subscriber is registered. IMSI is obtained for the IP address to be forwarded by receiving the first routing information data from the HLR1 (30), and the second routing information request data is transmitted to the corresponding HLR2 (31) to obtain the SGSN address where the subscriber is registered. Require. Upon receiving the second routing information data from the HLR2 31 and transmitting the packet data reception notification request data notifying that the packet data has been received from the Internet network 60 to the newly determined SGSN2 41 for the IP address to be forwarded, From the SGSN2 41, state information on whether or not the subscriber is in a callable state is checked to receive packet data reception notification response data.

The HLR1 30 receives the first routing information request data from the GGSN 50, obtains IMSI from the destination IP, and transmits the first routing information data to the GGSN 50, and the HLR2 31 transmits the GGSN ( Receives the second routing information request data from 50), checks the IMSI and the subscriber status, and transmits the second routing information data including the SGSN address where the subscriber is registered to the GGSN 50.

The SGSN2 41 receives the packet data reception notification request data notifying that the packet data has been received from the Internet network 60 from the GGSN 50 and checks the state information on whether or not the corresponding subscriber is available to receive the packet data. It is responsible for transmitting the reception notification response data to the GGSN 50.

A packet call switching method in a mobile communication system according to an embodiment of the present invention will be described with reference to the scenario of FIG.

First, when packet data is received from the Internet network 60 to the GGSN 50, the GGSN 50 extracts the destination IP address, and then uses the destination IP address to obtain the address and subscriber number information configured in the GGSN database. By referring to the IMSI, the first routing information request data is transmitted to the HLR1 30 to request the SGSN address where the subscriber is registered. Here, since the GGSN 50 manages IMSI information per IP address, the IMSI can be obtained.

When the HLR1 30 receives the first routing information request data from the GGSN 50, the HLR1 30 checks the IMSI and the subscriber status through the received first routing information request data.

At this time, the HLR1 30 determines whether the call forwarding service is set in the subscriber information. Here, it is assumed that all information of a subscriber is stored in the HLRs 30 and 31, and service related information is stored only when the operator is a subscriber to the call forwarding service.

When the forwarding service is set, the first routing information data is transmitted to the GGSN 50 together with the forwarding information data. The forwarding information data includes IP address information to be forwarded. In this case, by adding a forwarding information data parameter to an information element for the first routing information data, the corresponding information element is changed and transmitted to the GGSN 50.

The GGSN 50 determines whether the first routing information data has been received from the HLR1 30. When the first routing information data is received, the GGSN 50 includes forwarding information data included in the message received from the HLR1 30. Judge. If it is determined that the forwarding information data is included in the message received from the HLR1 30, the IMSI for the IP address to be forwarded is obtained, and the second routing information request data is transmitted to the corresponding HLR2 31 so that the subscriber is located. Requires a registered SGSN address. Here, when the GGSN 50 is an IP address for which IMSI cannot be obtained among the received destination IP addresses, the GGSN 50 routes to the Internet network 60 to perform a router role. This means that the GGSN does not belong to the mobile communication network as a result of determining whether the destination IP belongs to the mobile communication network or the Internet network 60 by referring to its database for the destination IP.

On the other hand, when the HLR2 31 receives the second routing information request data from the GGSN 50, it checks the IMSI and the subscriber status through the second routing information data and the new SGSN2 41 address where the subscriber is registered. Responds with GGSN 50.

Then, the GGSN 50 transmits the packet data reception notification request data notifying that the packet data has been received from the Internet network 60 to the newly determined corresponding SGSN2 41 for the IP address to be forwarded, accordingly corresponding SGSN2 41 checks the state information on whether or not the corresponding subscriber is in a callable state and transmits packet data reception notification response data to the GGSN 50.

Accordingly, the SGSN2 41 paging to the corresponding Routing Area (RA) area, and the MS2 11 responds to paging to establish a packet call in a PDP Context Activation procedure (next generation GPRS network). Procedure) is performed to set up a radio resource between the MS2 (11) and the RNC2 (21), a PDP context is created between the RNC2 (21) and SGSN2 (41) and GGSN (50), the traffic path (Traffic Path) It is set so that the subscriber can transmit and receive packet data service.

Although the preferred embodiments of the present invention have been described in detail above, it will be understood by those skilled in the art that the present invention may be modified or modified in various ways. Therefore, changes of the embodiments of the present invention will not be able to escape the technical scope of the present invention.

As described above, the present invention registers the called subscriber to forward all calls to his IP address when the incoming packet call is requested, so that every call received from the Internet network is a URL address, a specific server address or other address registered in the HLR. Call forwarding to any mobile subscriber has the effect of automatically routing a commercial or advertising homepage upon incoming call request to the called subscriber.

Claims (8)

Receiving packet data from an internet network and transmitting first routing information request data; Determining whether the corresponding call forwarding service is set by the corresponding subscriber according to the first routing information request data; Transmitting first routing information data including forwarding information data according to a determination result of whether the forwarding service is set; And setting up an incoming packet call according to the forwarding information data. The method of claim 1, Receiving packet data from the Internet network and transmitting the first routing information request data, Extracting a destination IP address from the packet data to obtain a subscriber number by referring to an address and subscriber number information configured in a GGSN database; And transmitting the first routing information request data including the subscriber number to the HLR1 and requesting the location of the corresponding subscriber. The method of claim 1, The step of setting the incoming packet call according to the forwarding information data, Transmitting second routing information request data according to the forwarding information data; Notifying reception of packet data according to the second routing information request data; Recognizing that the packet data is received and determining whether the called subscriber can be received; And setting up a packet call according to the result of the determination of the possibility of the incoming call. The method of claim 1, The forwarding information data comprises a destination IP address to be forwarded, the packet call switching method in the mobile communication system, characterized in that transmitted in the first routing information data. The method according to claim 1 or 4, The forwarding information data is added to the information element of the first routing information data packet call switching method in the mobile communication system, characterized in that for changing the information element. The method of claim 1, The forwarding information data includes a URL address registered in the HLR, a specific server address, or an address of any other mobile communication subscriber. The method of claim 3, The step of determining whether the call is possible according to the second routing information data, HLR2 receiving the second routing information request data from the GGSN checks the IMSI and the subscriber status and transmits the second routing information data to the GGSN; Transmitting, by the GGSN, packet data reception notification request data indicating that packet data has been received from the Internet network to the newly determined SGSN2 through an IP address to be forwarded included in the second routing information data; SGSN2 further comprises the step of transmitting the packet data reception notification response data to the GGSN by checking the status information on whether or not the subscriber is in a callable state. The method according to claim 3 or 7, When the called subscriber is available, when the SGSN2 pages to the corresponding Routing Area (RA) area, the mobile station (MS) 2 performs a response to the corresponding paging; A method of switching a packet call in a mobile communication system, comprising the step of generating a PDP context between a Radio Network Controller (RNC) 2, a newly defined SGSN2, and a GGSN.