KR101405678B1 - Handover system between heterogeneous networks - Google Patents

Abstract

The present invention provides an inter-network handover system for providing a first wireless network service to a mobile communication terminal of a second wireless network, the system comprising: an evolved packet data gateway (ePDG) Data Gateway) and P-GW {Packet Data Network (PDN) -Gateway}; A plurality of first AP units transmitting and receiving signals of the first wireless network to and from the mobile communication terminal; A plurality of second AP units (e.g. Node-B, eNode-B) for transmitting / receiving signals of the second wireless network to / from the mobile communication terminal; And an AC (AP Controller) unit for controlling the plurality of first AP units, wherein an IKEv2 (Internet Key Exchange Protocol 107 TTA Journal No. 99 Version 2) client is installed in the AC unit.
Thereby, an AC (AP Controller) unit for controlling a plurality of access points (APs) is provided, and an IKEv2 client for performing handover between heterogeneous networks is provided in the AC unit. Thus, A handover can be implemented.

Description

[0001] HANDOVER SYSTEM BETWEEN HETEROGENEOUS NETWORKS [

The present invention relates to a heterogeneous network handover system, and more particularly, to an AC (AP Controller) unit for controlling a plurality of access points (APs), and an IKEv2 The present invention relates to a heterogeneous network handover system in which a general-purpose handover is implemented without installing additional clients for all terminals by installing a client.

The 3rd Generation Partnership Project (3GPP) defines a handover between LTE and WiFi. The handover between the WiFi network evolved Packet Data Gateway (ePDG) and the LTE P-GW {PDN (Packet Data Network) In this case, the P-GW acts as an anchor for signal transmission between the LTE network and the WiFi network.

In order to interoperate with the WiFi network and the ePDG, an I-WLAN client must be installed in the user's mobile communication terminal, and the ePDG performs handover between the heterogeneous networks in cooperation with the P-GW.

However, the I-WLAN client can be installed only in an Android-based terminal, and it is impossible to mount the I-WLAN client in all terminals except the Android-based terminal.

Therefore, the handover between heterogeneous networks can be serviced only in some Android-based terminals, and it is necessary to cooperate with the terminal manufacturer to mount I-WLAN clients. It is necessary for service providers to apply handover between heterogeneous networks to the network .

The present invention has been made in order to solve the above problems, and it is an object of the present invention to provide an AC controller for controlling a plurality of Access Points (APs) and to perform handover between heterogeneous networks The present invention provides an inter-network handover system in which a handover is universally implemented without installing additional clients for all terminals by installing an IKEv2 client.

According to an aspect of the present invention, there is provided a heterogeneous network handover system for providing a first wireless network service to a mobile communication terminal of a second wireless network, An evolved Packet Data Gateway (ePDG) and a P-GW (Packet Data Network) -Gateway}; A plurality of first AP units transmitting and receiving signals of the first wireless network to and from the mobile communication terminal; A plurality of second AP units (e.g. Node-B, eNode-B) for transmitting / receiving signals of the second wireless network to / from the mobile communication terminal; And an AC (AP Controller) unit for controlling the plurality of first AP units, wherein the AC unit is provided with an IKEv2 (Internet Key Exchange Protocol 107 TTA Journal No. 99 Version 2) ≪ / RTI >

Here, the AC unit further includes an Internet Protocol Security (IPSec) processing unit.

In addition, the IPSec processing unit is configured to interwork with the evolved packet data gateway to transmit and receive an encrypted signal.

Here, the first wireless network or the second wireless network may be a Wi-Fi network, a 3G network, or an LTE network.

According to the present invention, an AC (AP Controller) unit for controlling a plurality of access points (APs) is provided, and an IKEv2 client for performing handover between heterogeneous networks is provided in the AC unit. A general handover can be realized.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.
1 is a schematic diagram showing a structure of a heterogeneous network handover system according to the present invention,
2 is a block diagram illustrating signal processing of an AC part of a heterogeneous network handover system according to the present invention,
3 is a block diagram illustrating data transmission and reception in a heterogeneous network handover system according to the present invention.

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

Prior to this, the terms used in the specification and claims should not be construed in a dictionary sense, and the inventor may, on the principle that the concept of a term can be properly defined in order to explain its invention in the best way And should be construed in light of the meanings and concepts consistent with the technical idea of the present invention.

Therefore, the embodiments shown in the present specification and the drawings are only exemplary embodiments of the present invention, and not all of the technical ideas of the present invention are presented. Therefore, various equivalents It should be understood that water and variations may exist.

2 is a block diagram showing signal processing of an AC part of a heterogeneous network handover system according to the present invention, and FIG. 3 is a block diagram showing the structure of an inter-network handover system according to the present invention. FIG. 2 is a block diagram illustrating data transmission / reception in a heterogeneous network handover system according to an embodiment of the present invention.

1 to 3, a heterogeneous network handover system according to the present invention includes a heterogeneous network 100 for providing a service of a first wireless network 100 to a mobile communication terminal 60 of a second wireless network 200, An Evolved Packet Data Gateway (ePDG) 10 and a P-GW (Packet Data Network) -based interworking with the first and second wireless networks 100 and 200, Gateway} 20; A plurality of first AP units 30 for transmitting / receiving signals of the first wireless network 100 to / from the mobile communication terminal 60; A plurality of second AP units 40 (e.g. Node-B, eNode-B) for transmitting / receiving signals of the second wireless network 200 to / from the mobile communication terminal 60; And an AC (AP Controller) unit 50 for controlling the plurality of first AP units 30. The AC unit 50 includes an IKEv2 (Internet Key Exchange Protocol 107 TTA Journal No. 99 Version 2) (52).

The first wireless network 100 and the second wireless network 200 shown in FIG. 1 refer to different types of wireless communication networks. For example, the first wireless network 100 may be a non-3GPP And the second wireless network 200 may be a 3GPP network. However, the second wireless network 200 is not limited to the 3GPP network, and may be interpreted to encompass wireless communication networks that have been proposed or proposed in the future.

The first wireless network 100 or the second wireless network 200 may be a Wi-Fi network, a 3G network, or an LTE network.

Hereinafter, handover between heterogeneous networks will be described in detail assuming that the first wireless network 100 is a WiFi network and the second wireless network 200 is an LTE network.

The first wireless network 100 implements communication with the mobile communication terminal 60 by interlocking a plurality of first AP units 30 and an AC unit 50 controlling the plurality of first AP units, Unit 50 is configured to interwork with the advanced packet data gateway 10 on the Core Network.

The evolved packet data gateway 10 communicates with the P-GW 20 and the P-GW 20 includes a second wireless network 200 and a plurality of second AP units , eNode-B) 40 to form a communication channel with the mobile communication terminal 60 through the second wireless network 200. [

1, even if the handover is performed from the first wireless network 100 to the second wireless network 200, since the P-GW 20 is not changed, Is possible.

Here, the evolved packet data gateway 10 provides IP-based signaling with the mobile communication terminal 60 when the mobile communication terminal 60 is connected to the first wireless network 100.

Here, the plurality of first AP units 30 transmit and receive traffic by communicating with the mobile communication terminal 60.

The AC unit 50 is installed at an upper end of the plurality of first AP units 30 and controls the plurality of first AP units 30 to transmit and receive signals.

The AC unit 50 performs NAT (Network Address Translation) processing and routing of the general traffic of the mobile communication terminal 60 in cooperation with the first AP unit 30. [

As shown in FIG. 2, the AC unit 50 includes an IKEv2 client 52 for implementing handover between heterogeneous networks.

The IKEv2 client 52 is an IPSec automatic key exchange protocol and provides security services such as Confidentiality, Data Integrity, Access Control and Data Source Authentication in order to protect IP do.

Here, the IKEv2 client 52 further includes an Internet Protocol Security (IPSec) processing unit 54 for communicating with the evolved packet data gateway 10.

That is, the traffic transmitted to the provider network (LTE, 3G, etc.) through the IPSec processing unit 54 is IPSec encrypted and transmitted / received to / from the evolved packet data gateway 10, It is routed to send and receive data.

After the IKEv2 signaling is performed with the evolved packet data gateway 10 through the IKEv2 client 52 of the AC unit 50, the data traffic transmitted and received is encrypted and transmitted through the IPSec processing unit 54 Communication between the AC unit 50 and the evolved packet data gateway 10 is implemented.

Thereafter, the evolved packet data gateway 10 transmits and receives signals in cooperation with the P-GW 20, and the P-GW 20 transmits and receives signals to and from the second wireless network 200 and the second AP unit 40 : Node-B, eNode-B) to the mobile communication terminal 60, thereby performing handover between heterogeneous networks.

In the above description, the handover of the mobile communication terminal 60 is implemented from the first wireless network 100 to the second wireless network 200, but it is needless to say that reverse handover can also be implemented.

The configuration on a core network such as AAA (Authentication, Authorization and Accounting), HA (Home Agent), MME (Mobility Management Entity) and S-GW (Serving Gateway) shown in FIG. 1 is a well- It is not a core matter of this study.

As described above, the heterogeneous network handover system according to the present invention comprises an AC (AP Controller) unit for controlling a plurality of access points (AP), and an IKEv2 client The handover can be universally implemented without installing additional clients for all terminals.

While the present invention has been described with reference to the exemplary embodiments and the drawings, it is to be understood that the technical scope of the present invention is not limited to these embodiments and that various changes and modifications will be apparent to those skilled in the art. Various modifications and variations may be made without departing from the scope of the appended claims.

Description of the Related Art [0002]
10: Evolved Packet Data Gateway 20: P-GW
30: first AP unit 40: second AP unit (e.g. Node-B, eNode-B)
50: AC part 52: IKEv2 client
54: IPSec processor 60: mobile communication terminal
100: first wireless network 200: second wireless network

Claims (4)

A heterogeneous network handover system for providing a first wireless network service to a mobile communication terminal of a second wireless network,
An evolved Packet Data Gateway (ePDG) and a P-GW (Packet Data Network) gateway interworking with the first and second wireless networks;
A plurality of first AP units transmitting and receiving signals of the first wireless network to and from the mobile communication terminal;
A plurality of second AP units transmitting and receiving signals of the second wireless network to and from the mobile communication terminal;
And an AC (AP Controller) unit for controlling the plurality of first AP units,
The AC unit is provided with a client IKEv2 (Internet Key Exchange Protocol 107 TTA Journal No. 99 Version 2)
The AC unit further includes an Internet Protocol Security (IPSec) processing unit,
And the IPSec processing unit interworks with the evolved packet data gateway to transmit and receive an encrypted signal. delete delete The method according to claim 1,
Wherein the first wireless network and the second wireless network are provided as any one of a Wi-Fi network, a 3G network, or an LTE network.

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