KR100470688B1 - Packet Call Forwarding Method in Mobile Communication System - Google Patents

Abstract

The present invention relates to a packet call switching method in a mobile communication system. In particular, when an incoming subscriber cannot receive a packet service when an incoming packet call is requested, a URL address, a specific server address, or any other mobile communication registered in the HLR. The present invention relates to a packet call switching method in a mobile communication system which is switched to a terminal.

A packet call switching method in a mobile communication system according to an embodiment of the present invention includes the steps of: receiving, by a first HLR, packet data from a Internet network through a Gateway GPRS Service Node (GGSN), and transmitting routing information to the GGSN; Notifying, by the GGSN, packet data reception to a first Serving GPRS Support Node (SGSN) according to the routing information; Attempting to page a first mobile station (MS) via a first RNC (Radio Network Controller) after the first SGSN is notified of the packet data reception; If the first MS is unresponsive to the paging attempt and the call forwarding function is set for the first MS, the first SGSN transmits packet data rejection request data including forwarding information data to the GGSN. Making a step; Acquiring routing information by requesting routing information from a second HLR according to the forwarding information data after the GGSN responds to the packet data rejection request data; Notifying the second SGSN of packet data reception according to the routing information acquired by the GGSN; And after the second SGSN is notified of the packet data reception, attempting to paging the second MS through the second RNC to activate the PDP context.

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 an incoming packet call is requested to any mobile subscriber in the Internet network, a URL address already registered in the HLR can be received. In addition, the present invention relates to a packet call switching method in a mobile communication system which enables a call forwarding to a specific server address or any other mobile communication subscriber.

In general, the next generation General Packet Radio Service (GPRS) network has a mobile station (MS) 1, a radio network controller (RNC) 2, and a home location register (HLR) 3, as shown in FIG. ), A Serving GPRS Support Node (SGSN) 4, a Gateway GPRS Service Node (GGSN) 5, and an Internet network 6, wherein the RNC 2 is a wireless network control system. The HLR (3) is a database that manages mobile subscribers, stores all subscriber information, manages location information (circuit / packet) for incoming routing, and the SGSN (4) is a GPRS service support system. It interworks with the corresponding RNC (2) through Iu interface and supports the GPRS service of the MS (1) by interworking with the corresponding GGSN (5) through the GN interface, and the GGSN (5) interworks with an external packet switching network. It connects with the corresponding SGSN (4) to the IP backbone network through the GN interface and connects with the corresponding MS (1). It supports transmission of packet data service between external packet networks. In addition, the Iu interface refers to the interface between the RNC (2) and the core network (Core Network), the corresponding GN interface refers to the interface between the SGSN (4) and GGSN (5) in the same provider network.

Meanwhile, in the conventional mobile communication system, a normal packet call procedure will be described with reference to the scenario of FIG.

First, when receiving packet data (PDP PDU (Packet Data Protocol Packet Data Unit)) from the Internet network 6, the GGSN 5 receives the packet data as a destination IP address (hereinafter referred to as "International Mobile Subscriber" (IMSI)). Identity ", and transmits routing information request data requesting the SGSN address where the subscriber is located to the HLR 3 (step S21). Accordingly, the HLR 3 transmits the routing information data to the GGSN 5 together with the SGSN1 address information (step S22).

Accordingly, when the GGSN 5 transmits the packet data reception notification request data notifying that the packet data has been received from the Internet network 6 to the SGSN 4 (step S23), the SGSN 4 receives the subscriber. Checks the state information on whether or not the call is possible and transmits the packet data reception notification response data to the GGSN 50 (step S24).

Subsequently, the SGSN 4 pages to the corresponding Routing Area (RA) area, and the MS 1 responds to paging to process a PDP Context Activation procedure (a procedure for establishing a packet call in a next-generation GPRS network). A radio resource is set up between the MS 1 and the RNC 2, a PDP context is created between the RNC 2, the SGSN 4, and the GGSN 5, and a traffic path is established. The subscriber is in a state capable of transmitting and receiving packet data service.

In the above-described next generation GPRS network, when an incoming packet call is requested to a mobile communication terminal from the Internet network, when the called subscriber cannot receive packet service, it cannot transfer to another terminal or an IP 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 6 requests a packet incoming call to any mobile communication terminal, if the called party cannot receive the packet service, it is required to request a service that allows the called party to forward to another terminal or IP address desired. It became.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned general problems, and an object thereof is a called subscriber when a called subscriber cannot receive a packet service when requesting a packet incoming from the Internet network to a mobile subscriber of a mobile communication system. All calls to their IP address are forwarded to the URL address or specific server address or any other mobile terminal registered in the HLR.

A feature of the present invention for achieving the above object is a packet call switching method in a mobile communication system for forwarding a packet call that is received from the Internet network to a mobile communication subscriber, wherein the first HLR is selected from the Internet network. Receiving packet data through a gateway GPRS service node (GGSN) and transmitting routing information to the GGSN; Notifying, by the GGSN, packet data reception to a first Serving GPRS Support Node (SGSN) according to the routing information; Attempting to page a first mobile station (MS) via a first RNC (Radio Network Controller) after the first SGSN is notified of the packet data reception; If the first MS is unresponsive to the paging attempt and the call forwarding function is set for the first MS, the first SGSN transmits packet data rejection request data including forwarding information data to the GGSN. Making a step; Acquiring routing information by requesting routing information from a second HLR according to the forwarding information data after the GGSN responds to the packet data rejection request data; Notifying the second SGSN of packet data reception according to the routing information acquired by the GGSN; And after the second SGSN is notified of the packet data reception, attempting paging for the second MS through the second RNC to activate the PDP context.

The forwarding data includes a destination IP address to be forwarded to and is added to an information element of the packet data reception notification rejection request data to change an existing information element.

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

3 is a next-generation GPRS network to which the present invention is applied, including MSs 10 and 11, RNCs 20 and 21, HLR 30, SGSNs 40 and 41, GGSN 50, and the Internet. It consists of a network (60).

The GGSN 50 receives packet data from the Internet network 60 and requests the HLR 30 the SGSN address where the subscriber is registered, and the SGSN address where the subscriber is registered from the HLR 30. When receiving the packet data transmission notification request data indicating that the packet data has been received from the Internet network 60 to the corresponding SGSN (40, 41), whether or not the subscriber can be received from the SGSN (40, 41) Receive the packet data reception notification response data including the result of checking the state information for.

At this time, SGSN1 (40) paging to the corresponding RNC1 (20), if the paging non-response, if the call forwarding function is set, the packet data reception notification rejection request data including the forwarding data with the reason of "subscriber no response" Is transmitted to the GGSN 50, the packet data reception rejection response data is received from the GGSN 50.

At this time, if the forwarding data information is included in the packet data reception notification rejection request data, the GGSN 50 obtains the IMSI for the IP address to be forwarded, which is forwarding data information, and sends the second routing information request data to the HLR2 31. When the called party requests the SGSN address where the called party is registered, the HLR2 31 transmits the second routing information data including the newly determined SGSN address 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 obtains an IMSI by referring to subscriber address and number information in its database, and sends the IMSI to the corresponding HLR1 30. The subscriber requests the SGSN address where the subscriber is registered using the first routing information request data included (step S41). 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, and then checks the SGSN1 address where the subscriber is registered. The first routing information data is transmitted to the GGSN 50 (step S42).

Accordingly, the GGSN 50 transmits the first packet data reception notification request data notifying that the packet data has been received from the Internet network 60 to the GGSN 50 to the SGSN1 40 (step S43). The SGSN1 40 determines whether or not the corresponding subscriber can be received and if possible transmits the first packet data reception notification response data to the MS1 10 to inform the PDP context activation plan (step S44).

Thereafter, SGSN1 40 pages to RNC1 20 (step S45). The RNC1 20 then pages to the MS1 10 (step S46). At this time, if there is no response to paging in MS1 20 for a predetermined time, the subscriber information data is searched through the subscriber database. If the search result indicates that the MS1 20 does not respond to paging, if the call forwarding is set, the SGSN1 40 GGSN the packet data reception notification rejection request data including the forwarding data information together with the reason of "subscriber no response". When transmitting to step 50 (step S47), the GGSN 50 that has received the packet data reception notification refusal request data responds to the SGSN1 40 (step S48).

In this case, forwarding data is included in the packet data reception notification rejection request data and transmitted to the GGSN 50.

The forwarding information data includes a destination IP address (for example, an ULR address, a specific server address, or any other mobile subscriber's address) to be forwarded, and is added to an existing information element of the packet data receiving notification rejection request data and is an information element. Change

On the other hand, when the GGSN 50 receives the packet data reception notification rejection request data from the SGSN1 40, the GGSN 50 checks whether the data includes the forwarding information data, and when the forwarding information data is included, the destination IP. The IMSI for the address is obtained, and the second routing information request data is transmitted to the corresponding HLR2 31 to request the SGSN address where the subscriber is registered (step S49). Here, when the GGSN 50 is an IP address for which IMSI cannot be obtained among the received destination IP addresses, the GGSN 50 performs a router role by routing from the Internet network 60. This means that the GGSN 50 does not belong to the mobile communication network as a result of checking whether the destination IP corresponds 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 request data, and checks the new SGSN address where the subscriber is registered. The second routing information data is transmitted to the GGSN 50 (step S50).

Then, the GGSN 50 belongs to the IP address to be forwarded, and transmits the second packet data reception notification request data notifying that the SGSN2 41 has received the packet data from the Internet network 60 ( Step S51), accordingly, the SGSN2 41 checks the state information on whether or not the corresponding subscriber is in a callable state, and sends the second packet data reception notification response data to the GGSN 50 when the subscriber is a callable subscriber. Transmit (step S52).

Accordingly, the SGSN2 41 pages to the RNC2 21 (step S53), and the RNC2 21 pages to the MS2 11 (step S54). At this time, the MS2 11 responds to paging to perform a context activation procedure so that radio resources are set up between the MS2 11 and the RNC2 21, and the PDP is between the RNC2 21, the SGSN2 41, and the GGSN 50. The context is created (step S55), and the traffic path is established so that the subscriber can transmit and receive the packet data service.

5 is a scenario illustrating a subscriber's location registration method in a mobile communication system in FIG.

First, the MS 10 transmits connection request data to the SGSN 40 to register the location and starts the subscriber's location registration (step S501).

Accordingly, the SGSN 40 transmits the location information update request data to the HLR 30 (step S502), and the HLR 30 inputs subscriber data for requesting subscriber data input including packet service subscriber data information. The request data is sent to the SGSN 40 (step S503).

The SGSN 40 stores the received packet service subscriber data information in an internal database, and responds to the successful storage of the packet service subscriber data information to the HLR 30 (step S504), and the HLR 30 is stored in its database. After updating the subscriber location information, the location information update response data is transmitted to the SGSN 40 (step S505).

The SGSN 40 stores the subscriber data received from the HLR 30 in the database.

Here, in order to set up the call forwarding function, forwarding data is added to the packet service subscriber data information included in the subscriber data input request message from the HLR 30 to the SGSN 40. The SGSN 40 stores all of the received packet service subscriber data information.

Thereafter, when SGSN 40 transmits the connection approval data to MS 10 (step S506), the corresponding MS 10 transmits the connection completion data to SGSN 40 (step S507).

In addition, when SGSN 40 transmits Iu interface release command data to RNC 20 (step S508), the corresponding RNC 20 transmits Iu interface release completion data to SGSN 40, whereby the subscriber's location registration is performed. This is completed (step S509).

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, in the present invention, when an incoming subscriber cannot receive a packet service when an incoming packet call is requested from the Internet network, all calls received through its own IP address are URL addresses registered in the HLR, a specific server address. Alternatively, the call forwarding to any other mobile communication terminal has an effect of automatically routing a commercial or advertising homepage.

1 illustrates a typical next generation GPRS network.

2 is a method for establishing a normal packet call in a general mobile communication system.

Figure 3 illustrates a next generation GPRS network in accordance with the present invention.

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

5 is a scenario showing a subscriber's location registration method in the mobile communication system in FIG.

* 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

Claims (3)

A packet call switching method in a mobile communication system for forwarding a packet call received from a Internet network to a mobile subscriber, Receiving, by the first HLR, packet data through a gateway GPRS service node (GGSN) from the Internet, and transmitting routing information to the GGSN; Notifying, by the GGSN, packet data reception to a first Serving GPRS Support Node (SGSN) according to the routing information; Attempting to page a first mobile station (MS) via a first RNC (Radio Network Controller) after the first SGSN is notified of the packet data reception; If the first MS is unresponsive to the paging attempt and the call forwarding function is set for the first MS, the first SGSN transmits packet data rejection request data including forwarding information data to the GGSN. Making a step; Acquiring routing information by requesting routing information from a second HLR according to the forwarding information data after the GGSN responds to the packet data rejection request data; Notifying the second SGSN of packet data reception according to the routing information acquired by the GGSN; And after the second SGSN is notified of the packet data reception, attempting to page a second MS through a second RNC to activate a PDP context. The method of claim 1, The forwarding data includes a destination IP address to be forwarded and is added to an information element of the packet data reception notification rejection request data to change an existing information element. delete