KR20180027152A - Apparatus and method for providing network connection based on private network policy - Google Patents

Abstract

The present invention provides a method for providing a portable terminal handover in accordance with a dedicated network policy. The method comprises the steps of: receiving a handover request of a portable terminal; and blocking data traffic of the portable terminal in accordance with a dedicated network policy when handover occurs from a dedicated network to a public network.

Description

[0001] The present invention relates to a method and apparatus for providing a network connection to a portable terminal in response to a dedicated network policy,

The present invention relates to a portable terminal handover providing method and apparatus corresponding to a dedicated network policy, and more particularly, to a portable terminal handover providing method and apparatus for selectively limiting data traffic in response to a dedicated network policy when handover of a portable terminal occurs between a private network and a public network Apparatus and method.

If the public network is operated by the network operator for public network use, it can be understood that the private network (or private network) is constructed by the company or individual at an expense and independently constructed. Recently, the number of companies and individuals who are considering the installation of dedicated networks is increasing in terms of network utilization speed and security.

A service gateway (SGW) is selected based on a TAC (Tracking Area Code) included in an international standard (for example, 3GPP) defining a network communication of a user equipment (UE) The technology can not select the service gateway (SGW) by separating the public network subscriber and the private network subscriber. Therefore, the dedicated network subscriber can select the service gateway (SGW) of the public network unless the base station (Evolved Node B, eNB) in the dedicated network region is separately constructed. In addition, if a base station (eNB) in a dedicated network area is separated and constructed, a public network subscriber can be connected to a dedicated network service gateway (SGW).

Generally, in order to use a data network using a mobile terminal, an Internet is connected through a network access point (APN) provided by a network operator or a business operator. The public network and the private network have different network access points (APNs), and the mobile terminal can distinguish between the public network and the private network through the method of converting the APN. However, the proposed network access point (APN) conversion function unconditionally converts the network access point (APN) regardless of whether the dedicated network subscriber is in or out of the dedicated network area. Therefore, in the dedicated network area, It is impossible to select the data network gateway (PGW) of the public network from the outside of the private network.

Handover between base stations (eNB) defined in the international standard (e.g. 3GPP) specification does not forcibly release the user traffic path unless a problem occurs in the network. Therefore, there is no way to block the data traffic that the customer uses through the private network when the private network subscriber moves from inside to outside of the private network. This may conflict with the security policy of the private network.

KR 10-2014-0005024 A

In the present invention, when it is desired to configure a private network not to pass through a common network or a network in terms of security for data traffic used by a specific group (e.g., an employee) in a specific area (e.g., company) And to provide a device and method for blocking data traffic when a handover occurs between a specific area and another area through a network device so as to pass through a public network or a business network outside the area.

In addition, the present invention provides a method and apparatus for selecting a service gateway using a TAC (Tracking Area Code) in response to a handover request from a mobile terminal, an access point name (APN) A method and an apparatus for controlling a handover operation in / from a dedicated network area in consideration of a dedicated network area information in a process of converting a handover route through a direct path between base stations (eNB) have.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are not restrictive of the invention, unless further departing from the spirit and scope of the invention as defined by the appended claims. It will be possible.

The present invention can provide an apparatus and method for selectively limiting data traffic in response to a dedicated network policy when handover of a portable terminal occurs between a private network and a public network.

A method for providing a handover for a portable terminal according to an embodiment of the present invention includes receiving a handover request of a handover terminal, and, when the handover occurs from a private network to a public network, And blocking the data traffic of the portable terminal.

The portable terminal handover providing method corresponding to the dedicated network policy may further include blocking the Internet connection through the dedicated network of the portable terminal in response to the dedicated network policy when the handover occurs from the public network to the dedicated network can do.

The blocking of the Internet connection may include blocking a connection to the service gateway and the packet data network gateway of the public network to which the portable terminal is connected; And attempting to connect to the service gateway and the packet data network gateway of the dedicated network.

The blocking of the data traffic may include blocking a connection attempt from the service gateway and the packet data network gateway of the dedicated network to which the portable terminal is connected. And requesting a connection to the service gateway of the public network.

Also, the handover between the public network and the private network can be recognized through a TAC (Tracking Area Code) included in the handover request of the portable terminal.

In addition, the handover may occur in units of Tracking Area (TA) rather than in a cell.

Also, the handover occurs between a cell and a base station, and can block data traffic in response to whether the mobile terminal joins a private network.

The portable terminal handover providing method corresponding to the dedicated network policy may further include determining whether the portable terminal is a subscriber of the dedicated network in response to a new Internet connection request through the dedicated network; Blocking the connection with the public network when the portable terminal is the subscriber; And performing the Internet connection request through the service gateway of the dedicated network and the packet data network gateway.

The portable terminal handover providing method corresponding to the dedicated network policy may further include performing the Internet connection request through the service gateway of the public network and the packet data network gateway in response to a new Internet connection request through the public network .

The portable terminal handover providing method corresponding to the dedicated network policy may further include maintaining the data network connection in response to the data network connection request of the portable terminal when the handover occurs in the private network or in the public network As shown in FIG.

Also, the data traffic may originate from an Internet data network (Internet PDN) or a default data network (Default PDN).

In addition, the data traffic generated through the IMS (IP Multimedia Subsystem) PDN can be continuously transmitted to the portable terminal despite the handover.

According to another embodiment of the present invention, a communication network apparatus for managing a data network includes a mobility management subject server for requesting a handover from a portable terminal and determining a handover process in response to a dedicated network policy; A home subscriber server for verifying that the portable terminal is a subscriber to a private network; At least one service gateway for performing a session request in response to call processing related to the handover confirmed through the mobility management subject server and the home subscriber server; And at least one packet data network gateway for securing a data network connection in response to a session request transmitted from the service gateway, wherein when the handover occurs between a private network and a public network, the mobility management subject server transmits, Or the public network, and attempt to connect the data network through another one of the private network or the public network.

In addition, the mobility management subject server can determine whether to use the dedicated network or the public network through location information (TAC) and dedicated network subscriber identification information included in the handover request.

In addition, the handover may occur in units of Tracking Area (TA) rather than in a cell.

In addition, the mobility management subject server can select the service gateway belonging to one of the private network and the public network corresponding to the location information (TAC) included in the request for the handover and the dedicated network subscriber confirmation information .

In addition, when the handover occurs between a cell and a base station, the data network connection may be blocked in response to the subscriber's identification information of the mobile terminal.

In addition, the mobility management subject server can change the access point name (APN) in response to the location information (TAC) included in the handover request and the dedicated network subscriber confirmation information.

In addition, when the handover occurs in the private network or occurs in the public network, the mobility management subject server can maintain a data network connection in response to a data network connection request of the portable terminal.

Also, the data network connection may include an Internet data network (Internet PDN) or a default data network (Default PDN).

In addition, in the case of an IP Multimedia Subsystem (PDSN) PDN during the data network connection, the service gateway belonging to the private network selects the packet data network gateway belonging to the public network and notifies the portable terminal of the continuous service Can be provided.

In addition, the mobility management subject server can interwork with a plurality of base stations.

According to another aspect of the present invention, a communication network apparatus includes: a plurality of base stations and a plurality of service gateways for providing a connection of a data network; And a mobility management subject server for selecting one of the plurality of service gateways based on a location code and a dedicated network subscriber code transmitted from one of the plurality of base stations and delivering a session creation request.

In addition, when the location code is a dedicated network area and the dedicated network subscriber code is valid, the session creation request may be transmitted to a service gateway belonging to a private network.

Also, when the location code is a non-dedicated area, the session creation request may be transmitted to a service gateway belonging to the public network.

In addition, the data network includes an Internet data network (Internet PDN) and an IMS data network (IMS PDN), and the service gateway through which the session creation request is transmitted may be determined according to the type of the data network.

In addition, when the inter-base station handover is requested, the service gateway may be selected corresponding to the location code and the dedicated network subscriber code.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, And can be understood and understood.

Effects of the method and apparatus according to the present invention will be described as follows.

The present invention can be applied to a system in which data traffic is used through a dedicated network in a private network, and a user who wishes to use data traffic through a public network or a provider network outside the private network can be accommodated without developing a separate network or developing a terminal There are advantages.

Further, the present invention has an advantage in that data traffic can be prevented from being used without development of a separate terminal even when the data traffic is used in the private network and the data traffic is moved outside the private network.

The effects obtainable by the present invention are not limited to the effects mentioned above, and other effects not mentioned can be clearly understood by those skilled in the art from the following description.

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. It is to be understood, however, that the technical features of the present invention are not limited to the specific drawings, and the features disclosed in the drawings may be combined with each other to constitute a new embodiment.
FIG. 1 illustrates a method of providing a handover for a portable terminal corresponding to a dedicated network policy.
2 illustrates a communication network apparatus for data network management.
3 illustrates a case where handover from a private network to a public network is requested.
FIG. 4 illustrates a case where a handover from a public network to a private network is requested.
Figure 5 illustrates the processing data required to handle handover between the private network and the public network.
FIG. 6 illustrates a call processing procedure when an exclusive network customer connects in a private network area.
7 illustrates a call processing procedure when a dedicated network customer connects from outside the private network.
8 illustrates a call processing procedure when a dedicated network customer moves from the private network area to the outside of the private network.
FIG. 9 illustrates a call processing procedure when a dedicated network customer moves from a private network to a private network area.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an apparatus and various methods to which embodiments of the present invention are applied will be described in detail with reference to the drawings. The suffix "module" and " part "for the components used in the following description are given or mixed in consideration of ease of specification, and do not have their own meaning or role.

In the description of the embodiments, when it is described as being formed on the "upper" or "lower" of each element, the upper or lower (lower) And that at least one further component is formed and arranged between the two components. Also, the expression "upward" or "downward" may include not only an upward direction but also a downward direction with respect to one component.

(TAC) -based service gateway (SGW) selection technology defined in the international standard for wireless communication (e.g., 3GPP) can not select a service gateway (SGW) by separating a general subscriber and a dedicated network subscriber, (eNB) is separated from the private network, the private network subscriber can not but choose the public network or the service gateway (SGW) of the network to use the data network. In addition, when a base station (eNB) in a dedicated network area is separately constructed, a portable terminal (e.g., a general subscriber) other than a dedicated network subscriber is connected to a service gateway (SGW) of a dedicated network.

As a result, it is possible to use the private network and the public network or business network separately by converting the access point name (APN). However, the Access Point Name (APN) conversion function performs an access point name (APN) conversion regardless of whether the dedicated network subscriber is in or out of the private network area. Therefore, when the portable terminal uses the private network in the communication network apparatus, it is impossible to select the packet data gateway (PGW) of the private network and to select the packet data gateway (PGW) of the public network or the provider network outside the private network. In addition, handover between base stations (eNBs) defined in the international standard for wireless communication (e. G., 3GPP) does not forcibly release the user traffic path unless a problem occurs in the network. There is no way to block data traffic that customers use through private networks. Such a problem may be a stumbling block to building and using a dedicated network for security reasons.

FIG. 1 illustrates a method of providing a handover for a portable terminal corresponding to a dedicated network policy.

As shown in the figure, a method for providing a handover of a portable terminal corresponding to a dedicated network policy includes a step (12) of receiving a handover request of the portable terminal, a step (14) of determining whether the portable terminal is a subscriber of the private network, (18) blocking the data traffic of the portable terminal in response to a leased network policy when an over occurs from the private network to the public network.

Although not shown, step 18 of blocking data traffic may include blocking attempts to connect to the service gateway and the packet data network gateway of the dedicated network to which the portable terminal is connected, and requesting connection to the service gateway of the public network .

In addition, when the handover occurs from the public network to the dedicated network, the method for providing a handover of the portable terminal corresponding to the dedicated network policy may further include blocking (18) blocking access to the Internet through the private network of the portable terminal . For example, blocking the Internet connection may include blocking the connection to the service gateway and packet data network gateway of the public network to which the portable terminal is connected, and attempting to connect to the service gateway and the packet data network gateway of the dedicated network Step < / RTI >

The portable terminal can be moved, but the base station eNB to which the portable terminal is connected is fixed at the same position. At least one base station (eNB) is connected to a communication network device including a service gateway (SGW), a packet data network gateway (PGW), etc. Generally, a mobile terminal can be connected to the Internet through a base station (eNB) have. The portable terminal can be connected to different eNBs while moving, and this process is referred to as handover. There are various cases of handover occurring while the portable terminal moves. For example, in the case where the mobility management subject server (MME) and the base station (eNB) exchange only when the mobility management subject server (MME) and the service gateway (SGW) The mobility management subject server MME and the service gateway SGW change when the service gateway SGW changes but the base station eNB and the service gateway SGW change and when the base station eNB, Or between different wireless communication technologies, schemes (e.g., from 3G to LTE, or from LTE to 3G). More specifically, when only the base station eNB is changed without changing the mobility management subject server (MME) and the service gateway (SGW) that the portable terminal has previously connected to, a direct tunnel is generated between the base station eNB A handover requested by the mobile terminal is performed through a first method (X2 based Handover) for performing a handover requested by the mobile terminal and an indirect tunnel between the SGW and the eNBs (S1 Handover) may be included.

Meanwhile, a public data network (PDN) connected to a portable terminal through a communication network device includes an Internet or a default data network (Internet / Default PDN) capable of transmitting / receiving data using a typical Internet network, (IP Multimedia Subsystem) data network (IMS PDN), which is used to use a multimedia system such as an Internet Protocol (IP) multimedia system.

Typically, a private network is installed to restrict access and use rights of a general user for accessing and using a subscriber, and may be designed in various ways according to purposes. For example, the private network restricts access to and use of the Internet or the default data network (Internet / Default PDN), but may not restrict access to and use of the IMS data network (IMS PDN). For example, the data traffic that the handover handover providing method corresponding to the dedicated network policy blocks according to the private network policy is one that occurs through the Internet data network (Internet PDN (Public Data Network)) or the default data network And what is generated through the IMS (IP Multimedia Subsystem) PDN may be continuously transmitted to the portable terminal without blocking despite the handover. In addition, the dedicated network may be operated in a closed manner for all the networks to which the user or the subscriber connects or uses.

The dedicated network can support the handover request of the portable terminal according to the public network or the provider network and the private network policy. The handover between the public network and the private network can be recognized through the tracking area code (TAC) included in the handover request of the portable terminal. The handover can occur between a cell and a base station, and can block data traffic in response to whether a mobile terminal joins a private network. In addition, handover may occur not only in a cell unit but also in a tracking area (TA) unit.

A method of providing a handover for a portable terminal in response to a request for a new Internet connection through a private network includes the steps of: determining whether the portable terminal is a subscriber of a private network; checking a data network to which the portable terminal is connected; . ≪ / RTI > If there is a network that restricts access to, access to, or use of the portable terminal according to the exclusive network policy and a network that does not have the network, the connection can be maintained or blocked according to the data network to which the portable terminal is currently connected. When the portable terminal is a subscriber, the portable terminal handover providing method corresponding to the dedicated network policy further includes a step of blocking connection with the public network and a step of performing an Internet connection request through the service gateway of the dedicated network and the packet data network gateway .

Meanwhile, the portable terminal handover providing method corresponding to the dedicated network policy may further include a step of performing an Internet connection request through the service gateway of the public network or the provider network and the packet data network gateway in response to a new Internet connection request through the public network .

If the handover occurs in the private network or occurs in the public network, the method may further include maintaining the data network connection in response to the data network connection request or the handover request of the portable terminal.

2 illustrates a communication network apparatus for data network management.

As shown, the portable terminals 48 and 48 'having mobility may be connected to the at least one base station 46A, 46B, and 46C through a wireless communication channel. Here, the case where the dedicated network 20 that is separated from the service provider network or the public network does not include a separate base station will be described as an example. The case where the private network 20 restricts the connection, access, and use rights to the private server 28 and the Internet data network 26 with limited network access authority but the IMS data network 38 does not limit the description do. The handover requested by the mobile terminal 48 or 48 'is changed in the base station (eNB, 46A, 46B, or 46C) or the service gateway (SGW 32 or 22) but the mobility management subject server The following description will be made by way of example.

The communication network apparatus for managing the data network includes a mobility management subject server 44 for requesting a handover from the portable terminals 48 and 48 'and determining handover processing in response to a dedicated network policy, portable terminals 48 and 48' (HSS) 42, a mobility management subject server (MME) 44, and a home subscriber server (HSS) 42 that confirm that the mobile subscriber is a dedicated network subscriber At least one packet data network gateway (PGW, 32, 22) for securing a data network connection in response to a session request transmitted from the service gateway (SGW, 32, 22) 34, 24). Here, the dedicated network 20 may include a separate service gateway (SGW) 22, a packet data network gateway (PGW) 24 and a dedicated server 28 and an Internet data network 26. The provider network or the public network also includes an Internet / default data network 36, an IMS data network 38, a service gateway (SGW) 32, a packet data network gateway (PGW) 34, a mobility management subject server (MME) And a home subscriber server (HSS) 42. Meanwhile, at least one base station 46C may be separately installed for a private network, or may be shared with a business network or a public network.

Referring to FIG. 2, the portable terminal 48 can request handover between different base stations (eNBs 46A and 46B) while moving. In this case, although the base station is changed, the mobility management subject server 44 and the service gateway 32 may not be changed. If the dedicated network 20 does not include a separate service gateway 22, even when a handover occurs between the cells 46A and 46B, The network connection may be blocked.

Also, while the portable terminals 48 and 48 'move, they can request handover between different base stations (eNB, 46B, and 46C). In this case, the portable terminal can be understood as a situation in which handover is requested from a provider network or a public network to a private network or from a private network to a provider network or a public network. In this case, not only the base station (eNB) but also the service gateway (SGW) can be changed according to the handover request, and the mobility management subject server 44 is not changed. In this case, the handover may occur in units of a tracking area (TA) instead of a cell.

When the handover requested by the portable terminal 48 or 48 'occurs between the private network and the public network, the mobility management subject server 44 blocks the data network connection through either the private network or the public network, You can try to connect to the data network through the other one. For example, when the portable terminal is connected to the private network 20 and connected to the Internet data network 26 or the dedicated server 28, when the portable terminal moves from the private network 20 to the public network or the carrier network, 26) or the connection with the dedicated server 28 may be blocked according to the private network policy.

The mobility management subject server (MME) 44 interworking with a plurality of base stations (eNBs 46A, 46B, and 46C) transmits a dedicated network 20), or the use of a provider network or a public network. When the dedicated network 20 and the provider network or the public network include different service gateways (SGWs), the mobility management subject server 44 transmits the location information (Tracking Area Code, TAC) In response to the confirmation information, the service gateways 32 and 22 belonging to one of the private network and the public network can be selected. In this case, the mobility management subject server 44 may change the access point name (APN) in response to the location information (TAC) included in the handover request and the dedicated network subscriber confirmation information.

When the handover occurs in the private network or occurs in the public network, the mobility management subject server 44 responds to the connection request to the data networks 36 and 26 of the portable terminals 48 and 48 ' It can be determined that the data network connection is maintained.

If there is a network that restricts access to, access to, or use of the portable terminal according to the exclusive network policy and a network that does not exist, the portable terminal 48 or 48 'can maintain or block the connection according to the connected data network. For example, the object of data network connection / disconnection may include an Internet data network (Internet PDN (Public Data Network)) or a default data network (Default PDN). In the case of the IP Multimedia Subsystem (IMS) data network 38 during the data network connection, the service gateway 22 belonging to the private network 20 selects the packet data network gateway 34 belonging to the public network, It is possible to support a continuous network connection to the portable terminals 48 and 48 '.

When a new Internet connection request is generated through the private network 20, the home subscriber server (HSS) 42 can determine whether the portable terminal 48 or 48 'is a subscriber of the private network 20, 44 intercepts the connection with the service gateway (SGW) 32 of the public network previously accessed when the portable terminal 48 or 48 'is a subscriber and disconnects the connection with the service gateway (SGW) 32 of the private network 20 Can be performed.

3 illustrates a case where handover from a private network to a public network is requested.

As shown in the figure, the portable terminal (smart phone, dedicated network customer) is connected to the service gateway (SGW # 1) of the private network. The portable terminal (smart phone) is connected to the Internet data network (Internet) through a private network. In addition, the service gateway SGW # 1 of the private network provides the IMS data network (IMS) to the portable terminal (smart phone) through the packet data network gateway PGW # 2 of the public network.

When the portable terminal (smart phone) moves to the outside of the private network, the portable terminal is connected to the service gateway (SGW # 2) of the public network and is connected to the Internet data network (Internet) Data network (IMS). At this time, connection to the packet data network gateway (PGW # 1) of the private network through the service gateway (SGW # 2) of the public network may be blocked according to the private network policy.

In response to a handover request transmitted from a portable terminal (smart phone), the MME includes a Tracking Area (TA), a Tracking Area Code (TAC), and a Tracking Area List , TAL) can be used. Through this information, it is possible to distinguish the private network from the public network. In this handover process, the mobility management subject server (MME) manages which service gateway (SGW # 1, # 2) or packet data network gateway (PGW # 1, # 2) . Also, the home subscriber server (HSS) determines whether the portable terminal (smart phone) is a subscriber of the private network.

The Policy and Charging Rules Function (PCRF) connected to the packet data network gateway (PGW # 2) belonging to the public network includes an Internet data network (Internet) used by a portable terminal (smart phone) (IMS) to be used / restricted, and the billing based on it.

Specifically, when a portable terminal attempts to access a network, a home subscriber server (HSS) can notify the location registration response (ULA) of a customer who is a target of a dedicated network. For a dedicated network, the service gateway (SGW) can be selected based on location information (TAC). For example, in the case of the private network, the service gateway SGW # 1 belonging to the private network can be selected. In the case of the private network, the service gateway SGW # 2 belonging to the public network can be selected.

Thereafter, in the case of the dedicated network, the packet data network gateway (PGW) can be selected based on the location information (TAC) as follows. For example, in the case of a dedicated network area, an access point name (APN) conversion operation may be performed to select a packet data network gateway (PGW) belonging to a private network. If it is outside the area where the private network is used, the packet data network gateway (PGW) belonging to the private network can be selected without performing the connection point name (APN) conversion operation.

(APN) for connection with the IMS data network for voice communication selects the packet data network gateway (PGW # 2) belonging to the public network in the same manner as the general customer, The access point name (APN) of the Internet data network (Internet) for the data used in the APN can select the packet data network gateway (PGW # 1) belonging to the private network through the APN conversion operation. In the handover procedure, the mobility management entity server (MME) is connected to the base station (eNB) and the service gateway (SGW) in the handover procedure. It may request to disconnect the Internet data network using the dedicated network.

When the handover procedure is completed, both the portable terminal, the base station (eNB), the mobility management subject server (MME), the service gateway (SGW) and the packet data network gateway (PGW) Service can be provided through an access point name (APN) for the Internet data network just like a regular customer if the user is reconnecting to the Internet.

FIG. 4 illustrates a case where a handover from a public network to a private network is requested.

As shown in the figure, the portable terminal (smart phone, dedicated network customer) is connected to the service gateway (SGW # 2) of the public network. Portable terminals (smart phones) access Internet data networks (Internet) and IMS data networks (IMS) through public networks.

When the portable terminal (smart phone) moves into the private network, the portable terminal is connected to the service gateway SGW # 1 of the private network and provides the Internet data network Internet through the packet data network gateway PGW # 1 of the private network Can receive. In addition, the service gateway SGW # 1 of the private network can provide the IMS data network (IMS) to the portable terminal (smart phone) through the packet data network gateway PGW # 2 of the public network. , And the connection to the packet data network gateway (PGW # 2) of the public network through the dedicated service network (SGW # 1) to the Internet data network (Internet) can be blocked.

4, the mobility management subject server MME determines whether or not the portable terminal (smartphone) is connected to any of the service gateways (SGW # 1 and # 2) or the packet data network gateway (PGW # 1, and # 2).

Specifically, since access is made from outside the area where the private network is used, the access point name (APN) for the IMS data network and the access point name (APN) for the Internet data network, The gateway (SGW # 2) and the packet data network gateway (PGW # 2). When the mobility management subject server MME receives a handover from the base station eNB and the service gateway SGW # 2 during the handover procedure, (APN) for an Internet data network to the Internet.

When the handover procedure is completed, both the portable terminal, the base station (eNB), the mobility management subject server (MME), the service gateway (SGW) and the packet data network gateway (PGW) (APN) conversion function is performed, and the service is provided through an access point name (APN) for an Internet data network through a private network. .

Figure 5 illustrates the processing data required to handle handover between the private network and the public network. In FIG. 3 and FIG. 4, when a handover between the private network and the public network occurs, the MME needs to be able to detect it.

First, referring to (a), location information (TAC) will be described when a handover occurs in a private network or a public network. Specifically, it can be divided into a table for selecting a service gateway (SGW), a table for selecting an access point name (APN) and a packet data network gateway (PGW).

Referring to (b), location information (TAC) will be described when a handover between a private network and a public network occurs. A table for selecting a service gateway SGW belonging to a private network, and a table for converting an access point name (APN) for using an internet data network of a private network.

(a) and (b), it can be seen that the handover between the private network and the public network is further considered with the dedicated network identifier and location information (TAC) indicating whether the private network is a customer.

FIG. 6 illustrates a call processing procedure when an exclusive network customer connects in a private network area. Here, the call processing procedure illustrated in FIG. 6 may refer to the network structure described in FIG.

When the mobile terminal 48 'located in the dedicated network region transmits a connection request signal (Attach Request) to the base station 46C of the corresponding area, the mobile terminal 48' (E.g., IMSI for subscriber identification / authentication). At this time, location information (TAC, H'1) of the exclusive network area can be transmitted together.

The mobility management subject server 44 can confirm whether the portable terminal 48 'is a dedicated network subscriber through a request signal (Update Location Request) to the home subscriber server 42. The home subscriber server 42 can inform the mobility management subject server 44 of whether or not the portable terminal 48 'is a dedicated network subscriber through an update location answer.

The mobility management subject server 44 may transmit an IMS Create Session Request to the service gateway 22 belonging to the private network. At this time, it is the setting information that the mobility management subject server 44 can select the service gateway 22 belonging to the private network. For example, when the dedicated network customer (Yes) makes a connection request in the location information (TAC, H'1) of the private network area, the service gateway (# 1, 22) belonging to the private network is set to be selectable.

The service gateway 22 belonging to the private network performs a Create Session Request to the packet data network gateway 34 belonging to the public network / public network in response to the IMS Create Session Request, Lt; / RTI >

On the other hand, in the case of the Internet data network (Internet PDN), the mobility management subject server 44 selects the service gateway 22 belonging to the private network according to the private network policy, and the service gateway 22 belonging to the private network transmits packet data And transmits a Create Session Request to the network gateway 24. [ The mobility management subject server 44 designates the access point name (APN) according to the private network policy, and the connection to the packet data network gateway 24 belonging to the private network can be made corresponding thereto.

7 illustrates a call processing procedure when a dedicated network customer connects from outside the private network. Here, the call processing procedure described with reference to FIG. 7 can refer to the network structure described in FIG.

When the mobile terminal 48 located in the public network / commercial network region transmits a connection request signal (Attach Request) to the base station 46B of the corresponding area, the mobility management subject server 44 transmits the unique identification information (E.g., IMSI for subscriber identification / authentication). At this time, the location information (TAC, H'2) of the public network / commercial network area can be transmitted together.

The mobility management subject server 44 can confirm whether the portable terminal 48 'is a dedicated network subscriber through a request signal (Update Location Request) to the home subscriber server 42. The home subscriber server 42 can inform the mobility management subject server 44 of whether or not the portable terminal 48 'is a dedicated network subscriber through an update location answer.

The mobility management subject server 44 may transmit an IMS Create Session Request to the service gateway 32 belonging to the public network / public network. At this time, it is the setting information that the mobility management subject server 44 can select the service gateway 32 belonging to the public network / public network. For example, the connection request in the location information (TAC, H'2) of the public network / public network area is set to select the service gateway (# 2, 32) belonging to the public network / public network.

The service gateway 32 belonging to the public network / commercial network performs a session creation request (Create Session Request) to the packet data network gateway 34 belonging to the public network / public network in response to the IMS Create Session Request, Connection of the data network can be performed.

On the other hand, in the case of the Internet data network (Internet PDN), the mobility management subject server 44 selects the service gateway 32 belonging to the public network / commercial network and does not perform the APN change procedure for the dedicated network subscriber . A Create Session Request is sent to the service gateway 32 belonging to the public network / public network and the packet data network gateway 34 belonging to the public network / public network by using the access point name (APN) for using the public network / public network. .

8 illustrates a call processing procedure when a dedicated network customer moves from the private network area to the outside of the private network. Here, the call processing procedure illustrated in FIG. 8 may refer to the network structure illustrated in FIG.

The connection of the IMS data network (IMS PDN) can be maintained, but the Internet data network (Internet PDN) needs to be reset according to the private network policy.

The base station 46C in the dedicated network region can deliver a handover request to the base station 46B in the public network / public network area in response to the portable terminal 48 'moving from the private network area to the public network / public network area. At this time, the location information (TAC, H'2) of the public network / commercial network area can be transmitted together.

The base station 46B in the public network / public network area transmits a Path Switch Request including the location information TAC, H'2 to the mobility management subject server 44, and the mobility management subject server 44 And the Internet data network (Internet PDN) used in the private network area is used in the public network / public network area.

First, the mobility management subject server 44 transmits a delete session request (Delete Session Request) to the service gateway 22 belonging to the private network. The service gateway 22 in the private network transmits a delete session request to the packet data network gateway 24 in the private network to block the existing connection.

Then, the mobility management subject server 44 transmits a Create Session Request to the service gateway 32 belonging to the public network / public network. In response, the service gateway 32 belonging to the public network / public network transmits a Modify Bearer Request to the packet data network gateway 34 belonging to the public network / public network.

FIG. 9 illustrates a call processing procedure when a dedicated network customer moves from a private network to a private network area. Here, the call processing procedure illustrated in FIG. 8 may refer to the network structure illustrated in FIG.

The connection of the IMS data network (IMS PDN) can be maintained, but the Internet data network (Internet PDN) needs to be reset according to the private network policy.

In response to the portable terminal 48 moving from the commercial network / public network area to the dedicated network area, the base station 46B in the public network / public network area can transmit a handover request to the base station 46C in the private network area. At this time, location information (TAC, H'1) of the exclusive network area can be transmitted together.

The base station 46C in the dedicated network region delivers a Path Switch Request including the location information TAC and H'1 to the mobility management subject server 44 and the mobility management subject server 44 transmits the path switching request including the location information TAC, (Internet PDN) used in the public network / public network area.

First, the mobility management subject server 44 transmits a delete session request to the service gateway 32 belonging to the public network / public network. The service gateway 32 belonging to the public network / public network transmits a delete session request to the packet data network gateway 34 belonging to the public network / public network to block the existing connection.

Thereafter, the mobility management subject server 44 transmits a Create Session Request to the service gateway 22 belonging to the dedicated network for connection to the IMS data network. In response, the service gateway 22 in the dedicated network transmits a Modify Bearer Request to the packet data network gateway 34 belonging to the public network / public network.

In addition, the mobility management subject server 44 transmits a path change request acknowledgment (Path Switch Request Ack) to the Internet data network (Internet PDN) to the base station 46C belonging to the private network, It is possible to induce a new session creation request to the gateway 22.

The method according to the above-described embodiments may be implemented as a program to be executed by a computer and stored in a computer-readable recording medium. Examples of the computer-readable recording medium include a ROM, a RAM, a CD- , A floppy disk, an optical data storage device, and the like, and may also be implemented in the form of a carrier wave (for example, transmission over the Internet).

The computer readable recording medium may be distributed over a networked computer system so that computer readable code can be stored and executed in a distributed manner. And, functional program, code, and code segments for implementing the above-described method can be easily inferred by programmers in the technical field to which the embodiment belongs.

It will be apparent to those skilled in the art that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof.

Accordingly, the above description should not be construed in a limiting sense in all respects and should be considered illustrative. The scope of the present invention should be determined by rational interpretation of the appended claims, and all changes within the scope of equivalents of the present invention are included in the scope of the present invention.

20: dedicated network 44: mobility management subject server
22, 32: a service gateway 42: a home subscriber server
24, 34: packet data network gateway
26, 36: Internet data network
38: IMS data network
46A, 46B, and 46C:
48, 48 ': portable terminal

Claims (27)

Receiving a handover request of the portable terminal; And
Blocking the data traffic of the portable terminal in response to the dedicated network policy when the handover occurs from the private network to the public network
Wherein the handover policy is a policy of the mobile terminal. The method according to claim 1,
Blocking the Internet connection through the dedicated network of the portable terminal in response to the dedicated network policy when the handover occurs from the public network to the dedicated network
Further comprising the steps of: receiving a handover request from the mobile terminal; 3. The method of claim 2,
The step of blocking the Internet connection
Blocking a connection to the service gateway and the packet data network gateway of the public network to which the portable terminal is connected; And
Attempting to connect to the service gateway and the packet data network gateway of the dedicated network
Wherein the handover policy is a policy of the mobile terminal. The method according to claim 1,
The step of blocking the data traffic
Blocking a connection attempt of the service gateway and the packet data network gateway of the private network to which the portable terminal is connected; And
Requesting a connection to the service gateway of the public network
Wherein the handover policy is a policy of the mobile terminal. The method according to claim 1,
Wherein handover between the public network and the private network is perceived through a TAC (Tracking Area Code) included in a handover request of the portable terminal. 6. The method of claim 5,
Wherein the handover occurs in units of a tracking area (TA) instead of a cell unit. The method according to claim 1,
Wherein the handover occurs between a cell and a base station and blocks data traffic in response to whether the mobile terminal joins a dedicated network. The method according to claim 1,
In response to a new Internet connection request through the dedicated network,
Determining whether the portable terminal is a subscriber of the private network;
Blocking the connection with the public network when the portable terminal is the subscriber;
Performing the Internet connection request through the service gateway of the dedicated network and the packet data network gateway
Further comprising the steps of: receiving a handover request from the mobile terminal; The method according to claim 1,
Performing the Internet connection request through the service gateway of the public network and the packet data network gateway in response to a new Internet connection request through the public network
Further comprising the steps of: receiving a handover request from the mobile terminal; The method according to claim 1,
Further comprising maintaining a data network connection in response to a data network connection request of the portable terminal when the handover occurs in the private network or in the public network, Delivery method. The method according to claim 1,
Wherein the data traffic is generated via an Internet data network (Internet PDN) or a default data network (Default PDN). 12. The method of claim 11,
Wherein the generated data traffic is continuously delivered to the portable terminal despite the handover, which occurs via an IP Multimedia Subsystem (PDSN) PDSN. A mobility management subject server for requesting a handover from a portable terminal and determining a handover process in response to a dedicated network policy;
A home subscriber server for verifying that the portable terminal is a subscriber to a private network;
At least one service gateway for performing a session request in response to call processing related to the handover confirmed through the mobility management subject server and the home subscriber server; And
At least one packet data network gateway for securing a data network connection in response to a session request transmitted from the service gateway,
If the handover occurs between the private network and the public network, the mobility management subject server blocks the data network connection through either the private network or the public network, and transmits the data A network device for data network management, attempting a network connection. 14. The method of claim 13,
Wherein the mobility management subject server determines whether to use the dedicated network or the public network through location information (TAC) and dedicated network subscriber identification information included in the handover request. 15. The method of claim 14,
Wherein the handover occurs in units of a tracking area (TA) instead of a cell. 15. The method of claim 14,
Wherein the mobility management subject server selects the service gateway belonging to one of the private network and the public network corresponding to location information (Tracking Area Code, TAC) and dedicated network subscriber confirmation information included in the handover request, Network devices for management. 14. The method of claim 13,
And disconnects the data network connection in response to the dedicated network subscriber identification information of the portable terminal when the handover occurs between a cell and a base station. 14. The method of claim 13,
Wherein the mobility management subject server changes an access point name (APN) in response to location information (TAC) and dedicated network subscriber confirmation information included in the handover request, Network device. 14. The method of claim 13,
Wherein the mobility management subject server maintains a data network connection in response to a data network connection request of the portable terminal when the handover occurs in the private network or in the public network. 14. The method of claim 13,
Wherein the data network connection comprises an Internet data network (Internet PDN (Public Data Network)) or a Default Data Network (Default PDN). 21. The method of claim 20,
In the case of an IP Multimedia Subsystem (PDSN) PDN during the data network connection, the service gateway belonging to the dedicated network selects the packet data network gateway belonging to the public network to provide a continuous service to the portable terminal despite the handover A network device for data network management. 14. The method of claim 13,
Wherein the mobility management subject server is operatively associated with a plurality of base stations. A plurality of base stations and a plurality of service gateways for providing a connection of a data network; And
A mobility management entity server for selecting one of the plurality of service gateways based on a location code transmitted from one of the plurality of base stations and a dedicated network subscriber code,
And a network device. 24. The method of claim 23,
Wherein the session creation request is transmitted to a service gateway belonging to a dedicated network when the location code is a dedicated network area and the dedicated network subscriber code is valid. 24. The method of claim 23,
Wherein the session creation request is delivered to a service gateway belonging to the public network when the location code is a non-dedicated area. 24. The method of claim 23,
Wherein the data network comprises an Internet data network (Internet PDN) and an IMS data network (IMS PDN)
Wherein the service gateway to which the session creation request is transmitted is determined according to the type of the data network. 24. The method of claim 23,
Wherein when the handover between the plurality of base stations is requested, the service gateway is selected corresponding to the location code and the dedicated network subscriber code.

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