KR102517252B1 - Apparatus and method for providing network connection based on private network policy - Google Patents

Abstract

The present invention corresponds to a dedicated network policy including receiving a handover request of a portable terminal and blocking data traffic of the portable terminal in response to the dedicated network policy when the handover occurs from a dedicated network to a public network. A portable terminal handover providing method is provided.

Description

Method and apparatus for providing network connection to portable terminal in response to private network policy

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

If a public network is operated by a network operator for the use of the network by the public, a dedicated network (or private network) can be understood as a company or individual independently building at their own expense. Recently, an increasing number of companies and individuals are considering installing a dedicated network in terms of network use speed and security.

Selecting a Serving Gateway (SGW) based on Tracking Area Code (TAC) included in international standards (e.g., 3GPP) that define network communication of a mobile terminal (User Equipment, UE) With technology, it is not possible to select a service gateway (SGW) by separating public network subscribers and private network subscribers. Therefore, unless a base station (evolved node B, eNB) in a dedicated network area is separately constructed, even a dedicated network subscriber can select a service gateway (SGW) of a public network. In addition, if a base station (eNB) in a dedicated network area is separately constructed, a public network subscriber can also access the dedicated network service gateway (SGW).

In general, in order to use a data network using a mobile terminal, the Internet is connected through a network access point (APN) provided by a network operator or operator. The public network and the private network have different network access points (APNs), and through a method of converting them, the mobile terminal can distinguish between the public network and the private network and access them. However, with the previously proposed network access point (APN) conversion function, network access point (APN) conversion is performed unconditionally regardless of whether the dedicated network subscriber is inside or outside the dedicated network area, so in the dedicated network area, the data network gateway ( It is impossible to select the Packet Date Network (PDN) Gateway, PGW) and the data network gateway (PGW) of the public network outside the dedicated network.

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

KR 10-2014-0005024 A

In the present invention, when a dedicated network is configured so that data traffic used by a specific group (eg, executives and employees) in a specific area (eg, company) does not pass through a common network or operator network in terms of security, the data traffic is passed through the dedicated network within the region. It is possible to provide a device and method capable of blocking data traffic when a handover occurs between a specific area and other areas through a network device so that it passes through a common network or operator network outside the corresponding area.

In addition, the present invention is a process of selecting a service gateway using local information (Tracking Area Code, TAC) in response to a handover request from a portable terminal, and an access point name (APN) using a dedicated network identifier. ), or a handover (X2 Handover) process through a direct path between base stations (eNBs), considering the dedicated network area information, it is possible to provide a method and apparatus for controlling a handover operation inside/outside a dedicated network area. there is.

The technical problems to be achieved in the present invention are not limited to the above-mentioned technical problems, and other technical problems not mentioned will be clearly understood by those skilled in the art from the description below. You will be able to.

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

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

In addition, the method for providing handover for a portable terminal corresponding to a private network policy further includes blocking Internet access of the portable terminal through the private network in response to the private network policy when the handover occurs from the public network to the private network. can do.

Also, the blocking of the Internet access may include blocking connections to a service gateway and a packet data network gateway of the public network to which the portable terminal is connected; and attempting connection to the service gateway and the packet data network gateway of the dedicated network.

The blocking of the data traffic may include blocking an attempt to connect to a service gateway and a 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.

In addition, handover between the public network and the dedicated network can be recognized through location information (Tracking Area Code, TAC) included in the handover request of the portable terminal.

In addition, the handover may occur in units of tracking areas (TAs) rather than units of cells.

In addition, the handover occurs between cells (base stations), and data traffic can be blocked in response to whether or not the portable terminal subscribes to a dedicated network.

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

In addition, the method for providing mobile terminal handover corresponding to the dedicated network policy may further include performing the Internet connection request through a service gateway and a packet data network gateway of the public network in response to a new Internet connection request through the public network. can

In addition, the method for providing handover for a portable terminal corresponding to a dedicated network policy includes maintaining a data network connection in response to a data network connection request of the portable terminal when the handover occurs within the private network or within the public network. may further include.

Also, the data traffic may occur through an Internet Public Data Network (PDN) or a default data network (Default PDN).

Also, among the data traffic generated through an IP Multimedia Subsystem (IMS) PDN, it can be continuously delivered to the portable terminal despite the handover.

A communication network device for data network management according to another embodiment of the present invention includes a mobility management subject server that receives a handover request from a portable terminal and determines handover processing in response to a dedicated network policy; a home subscriber server that checks whether the portable terminal is a dedicated network subscriber; at least one service gateway that performs a session request in response to call processing related to the handover confirmed through the mobility management principal server and the home subscriber server; and at least one packet data network gateway that secures a data network connection in response to a session request transmitted from the service gateway, and when the handover occurs between a dedicated network and a public network, the mobility management subject server operates the dedicated network. Alternatively, the data network connection made through one of the public networks may be blocked, and the data network connection may be attempted through the other one of the dedicated network and the public network.

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

In addition, the handover may occur in units of tracking areas (TAs) rather than units of cells.

In addition, the mobility management subject server may select the service gateway belonging to either the dedicated network or the public network in response to location information (Tracking Area Code, TAC) and private network subscriber identification information included in the handover request. .

In addition, when the handover occurs between cells (base stations), the data network connection may be blocked in response to the private network subscriber identification information of the portable terminal.

In addition, the mobility management subject server may change an access point name (APN) in response to location information (Tracking Area Code, TAC) and private network subscriber identification information included in the handover request.

In addition, when the handover occurs within the dedicated network or within the public network, the mobility management subject server may 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 Public Data Network (PDN) or a default data network (Default PDN).

In addition, in the case of an IP Multimedia Subsystem (IMS) PDN among the data network connections, the service gateway belonging to the dedicated network selects the packet data network gateway belonging to the public network to provide continuous service to the portable terminal despite the handover. can provide.

In addition, the mobility management principal server may interwork with a plurality of base stations.

A communication network device according to another embodiment of the present invention includes a plurality of base stations and a plurality of service gateways for providing connection to a data network; and a mobility management subject server that selects one of the plurality of service gateways based on the location code and the dedicated network subscriber code transmitted from one of the plurality of base stations and transmits a session creation request.

In addition, when the location code corresponds to 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 the dedicated network.

In addition, when the location code is in a non-private network area, the session creation request may be transmitted to a service gateway belonging to a 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 to which the session creation request is transmitted may be determined according to the type of the data network.

In addition, when handover between the plurality of base stations is requested, the service gateway may be selected in response to the location code and the dedicated network subscriber code.

The above aspects of the present invention are only some of the preferred embodiments of the present invention, and various embodiments in which the technical features of the present invention are reflected are detailed descriptions of the present invention to be detailed below by those skilled in the art. It can be derived and understood based on.

The effects of the method and apparatus according to the present invention are described as follows.

The present invention uses data traffic through dedicated network equipment inside a dedicated network and uses data traffic through public network or operator network equipment outside the dedicated network without building a separate network or developing a terminal. There are advantages.

In addition, the present invention has the advantage of being able to block the use of data traffic without developing a separate terminal even when data traffic is used inside the dedicated network using dedicated network equipment and then moves to the outside of the dedicated network.

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

The accompanying drawings are provided to aid understanding of the present invention, and provide embodiments of the present invention together with a detailed description. However, the technical features of the present invention are not limited to specific drawings, and features disclosed in each drawing may be combined with each other to form a new embodiment.
1 describes a portable terminal handover providing method corresponding to a dedicated network policy.
Figure 2 illustrates a communication network device for data network management.
3 illustrates a case in which a handover from a dedicated network to a public network is requested.
4 illustrates a case in which a handover from a public network to a dedicated network is requested.
5 describes processing data required to process handover between a dedicated network and a public network.
6 illustrates a call processing process when a dedicated network customer accesses a dedicated network area.
7 illustrates a process of processing a call when a dedicated network customer accesses from outside the dedicated network.
8 illustrates a call processing process when a dedicated network customer moves from a dedicated network area to an outside of the dedicated network.
9 illustrates a call processing process when a dedicated network customer moves from outside the dedicated network to a dedicated network area.

Hereinafter, an apparatus and various methods to which embodiments of the present invention are applied will be described in more detail with reference to the drawings. The suffixes "module" and "unit" for components used in the following description are given or used together in consideration of ease of writing the specification, and do not have meanings or roles that are distinct from each other by themselves.

In the description of the embodiment, in the case where it is described as being formed on the “upper (above) or lower (below)” of each component, the upper (upper) or lower (lower) means that two components are in direct contact with each other or One or more other components are formed by being disposed between two components. In addition, when expressed as "up (up) or down (down)", it may include the meaning of not only an upward direction but also a downward direction based on one component.

Since the service gateway (SGW) selection technology based on the area (TAC) defined in the wireless communication international standards (e.g., 3GPP) cannot separate general subscribers and private network subscribers and select a service gateway (SGW), base stations in the dedicated network area Unless an eNB is separately built, even a dedicated network subscriber has no choice but to select a service gateway (SGW) of a public network or an operator's network in order to use a data network. In addition, if a base station (eNB) in a dedicated network area is separately constructed, a portable terminal (eg, a general subscriber) other than a dedicated network subscriber accesses the service gateway (SGW) of the dedicated network.

For this reason, through a method of converting an access point name (APN), a dedicated network and a public network or operator network can be distinguished and used. However, with the access point name (APN) conversion function, access point name (APN) conversion is performed regardless of whether the dedicated network subscriber is inside or outside the dedicated network area. Therefore, it is impossible to select a packet data gateway (PGW) of the private network when the portable terminal uses the dedicated network inside the communication network device, and to select the packet data gateway (PGW) of the public network or operator network outside the dedicated network. In addition, handover between base stations (eNB) defined in international standards for wireless communication (e.g., 3GPP) does not forcibly release the user traffic path unless a problem occurs in the network. In this case, there is no way to block the data traffic used by the customer through the dedicated network. This problem may be an obstacle to building and using a dedicated network for reasons such as security.

1 describes a portable terminal handover providing method corresponding to a dedicated network policy.

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

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

In addition, when a handover occurs from the public network to the private network, the method for providing handover for a portable terminal corresponding to the private network policy may further include blocking the portable terminal from accessing the Internet through the private network in response to the private network policy (18). can For example, the step of blocking Internet access includes 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 packet data network gateway of the private network. steps may be included.

The portable terminal can move, but the base station (eNB) to which the portable terminal accesses is fixed at the same location. 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. In general, a portable terminal can be connected to the Internet through the base station (eNB) and a communication network device. there is. While the portable terminal moves, it can be connected to different base stations (eNBs), and this process is referred to as handover. There may be various cases of handover that occurs while the portable terminal moves. For example, handover is performed when only the base station (eNB) is changed without changing the mobility management main server (MME) and the service gateway (SGW) to which the portable terminal previously accessed, the mobility management main server (MME) and the base station (eNB) ) changes but the service gateway (SGW) does not change, the base station (eNB) and service gateway (SGW) change, the base station (eNB), mobility management principal server (MME) and service gateway (SGW) change, Alternatively, there may be a case of change between different wireless communication technologies and schemes (eg, from 3G to LTE or from LTE to 3G). In addition, in detail, when only the base station (eNB) is changed without changing the mobility management main server (MME) and the service gateway (SGW) to which the portable terminal has previously accessed, a direct tunnel is created between the base stations (eNB). and performs handover requested by the portable terminal through an indirect tunnel between the service gateway (SGW) and two base stations (eNBs). A second method (S1 Handover) may be included.

On the other hand, a data network (Public Data Network, PDN) that a portable terminal accesses through a communication network device includes the Internet or default data network (Internet/Default PDN) and voice (Voice) that can transmit and receive data using a general Internet network. ) may include an IP Multimedia Subsystem (IMS) data network (IMS PDN) used to use a multimedia system such as.

Typically, a private network is installed to limit access and use rights of general users for security purposes and to allow access and use to subscribers, and may be designed in various ways according to the purpose. For example, a private network may restrict access to and use of the Internet or default data network (Internet/Default PDN), but may not restrict access to and use of the IMS data network (IMS PDN). For example, in a mobile terminal handover providing method corresponding to a private network policy, data traffic blocked according to the private network policy may occur through an Internet data network (Internet PDN (Public Data Network)) or a default data network (Default PDN). In addition, what occurs through an IP Multimedia Subsystem (IMS) PDN may be continuously transmitted to a portable terminal without blocking despite handover. In addition, the dedicated network may be operated closed to all networks accessed and used by users or subscribers.

A dedicated network may support a handover request of a portable terminal according to a public network or an operator's network and a private network policy. Handover between the public network and the private network can be recognized through location information (Tracking Area Code, TAC) included in the handover request of the portable terminal. Handover may occur between cells (base stations), and data traffic may be blocked in response to whether or not a portable terminal subscribes to a dedicated network. In addition, handover may occur in units of tracking areas (TAs) as well as units of cells.

In response to a new Internet connection request through a dedicated network, a method for providing handover for a portable terminal corresponding to a dedicated network policy includes determining whether the portable terminal is a subscriber of the dedicated network (14), and identifying a data network to which the portable terminal is connected (16). can include If there exists a network that restricts the access, access, and use of a portable terminal according to the dedicated network policy and a network that does not, the connection can be maintained or blocked depending on the data network to which the portable terminal is currently connected. If the mobile terminal is a subscriber, the method for providing handover of the mobile terminal corresponding to the private network policy may further include blocking the connection with the public network and requesting an Internet connection through a service gateway and a packet data network gateway of the private network. can

On the other hand, a method for providing mobile terminal handover corresponding to a dedicated network policy may further include requesting an Internet connection through a service gateway and a packet data network gateway of a public network or operator network in response to a new Internet connection request through a public network. can

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

Figure 2 illustrates a communication network device for data network management.

As shown, portable terminals 48 and 48' having mobility may be connected to at least one base station 46A, 46B and 46C through a wireless communication channel. Here, a case in which the private network 20 distinguished from the operator network or the public network does not include a separate base station will be described as an example. In addition, the dedicated network 20 restricts access, access, and usage rights to the dedicated server 28 and the Internet data network 26 with limited access rights within the network, but the IMS data network 38 is not restricted. do. In addition, in the handover requested by the portable terminals 48 and 48', the base station (eNB, 46A, 46B, and 46C) or the service gateway (SGW, 32, 22) is changed, but the mobility management subject server (MME, 44) is not changed. A case in which this is not the case is described as an example.

The communication network device for data network management includes a mobility management subject server 44 that receives a handover request from the portable terminals 48 and 48' and determines handover processing in response to the dedicated network policy, and the portable terminals 48 and 48' Session request is performed in response to handover-related call processing confirmed through the home subscriber server (HSS, 42), the mobility management subject server (MME, 44), and the home subscriber server (HSS, 42) that verify whether the subscriber is a dedicated network subscriber. At least one service gateway (SGW, 32, 22), and at least one packet data network gateway (PGW, 34, 24). Here, the dedicated network 20 may include a separate service gateway (SGW, 22), a packet data network gateway (PGW, 24), a dedicated server 28, and an Internet data network 26. In addition, the operator network or public network includes the Internet/default data network 36, the IMS data network 38, the service gateway (SGW, 32), the packet data network gateway (PGW, 34), and the mobility management subject server (MME, 44). and a home subscriber server (HSS) 42. Meanwhile, at least one base station 46C may be installed separately for a dedicated network or may be shared with an operator's network or a public network.

Referring to FIG. 2, while the portable terminal 48 is moving, it can request handover between different base stations (eNB, 46A, 46B). In this case, the base station is changed, but the mobility management subject server 44 and the service gateway 32 may not be changed. On the other hand, when the private network 20 does not include a separate service gateway 22, even when handover occurs between cells (cells, 46A, 46B), data in response to the private network subscriber identification information of the portable terminal 48 Network connectivity may be blocked.

In addition, while the mobile terminals 48 and 48' move, handover between different base stations eNBs, 46B and 46C may be requested. In this case, the portable terminal may understand a situation in which handover is requested from an operator network or public network to a dedicated network or from a dedicated network to an operator network or public network. In this case, a case in which not only the base station (eNB) but also the service gateway (SGW) may be changed according to the handover request and the mobility management subject server 44 is not changed is an example. In this case, handover may occur in units of tracking areas (TAs) rather than units of cells.

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

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

In addition, when the handover occurs within a dedicated network or within a public network, the mobility management subject server 44 responds to a connection request of the portable terminals 48 and 48' to the data networks 36 and 26, It may decide to maintain a data network connection.

If there exists a network that restricts the access, connection, and use of portable terminals according to the dedicated network policy and a network that does not, the connection can be maintained or blocked depending on the data network to which the portable terminals 48 and 48' are currently connected. For example, an object of data network connection/disconnection may include an Internet Public Data Network (PDN) or a default data network (Default PDN). In addition, in the case of an IMS (IP Multimedia Subsystem) data network 38 among data network connections, the service gateway 22 belonging to the dedicated network 20 selects the packet data network gateway 34 belonging to the public network and performs handover. In spite of this, it is possible to support continuous network connection to the portable terminals 48 and 48'.

When a new Internet connection request occurs through the dedicated network 20, the home subscriber server (HSS, 42) can determine whether the portable terminals 48 and 48' are subscribers of the dedicated network 20, and the mobility management subject server ( 44) blocks the connection with the service gateway (SGW, 32) of the public network to which the portable terminals (48, 48') have been previously accessed, and requests Internet connection through the service gateway (SGW, 22) of the dedicated network (20) when the portable terminals (48, 48') are subscribers. can be performed.

3 illustrates a case in which a handover from a dedicated network to a public network is requested.

As shown, a portable terminal (smart phone, private network customer) is connected to a service gateway (SGW #1) of a private network. A portable terminal (smart phone) accesses an Internet data network (Internet) through a dedicated network. In addition, the service gateway (SGW #1) of the dedicated 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 (smartphone) moves outside the dedicated network, the portable terminal is connected to the service gateway (SGW #2) of the public network and connects to the Internet data network (Internet and IMS) through the packet data network gateway (PGW #2) of the public network. A data network (IMS) may be provided. 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 the handover request transmitted from the portable terminal (smartphone), the mobility management main server (MME) provides tracking area (TA), location information (Tracking Area Code (TAC)) and tracking area list (Tracking Area List). , TAL) can be used. Through this information, a dedicated network and a public network can be distinguished. During this handover process, the mobility management entity server (MME) manages which service gateway (SGW #1, #2) or packet data network gateway (PGW #1, #2) the portable terminal (smart phone) is connected to. can In addition, the home subscriber server (HSS) determines whether the portable terminal (smart phone) is a subscriber of the dedicated network.

On the other hand, the Policy and Charging Rules Function (PCRF) connected to the packet data network gateway (PGW #2) belonging to the public network is connected to the Internet data network (Internet) and the IMS data network used by the portable terminal (smartphone). (IMS) can be used/restricted and billing can be determined accordingly.

Specifically, when a portable terminal attempts to access a network, the home subscriber server (HSS) may inform the location registration response (ULA) of a customer subject to use of the dedicated network. In the case of using a dedicated network, a service gateway (SGW) can be selected based on location information (TAC). For example, in the case of a dedicated network area, a service gateway (SGW #1) belonging to a private network may be selected, and in a case outside a dedicated network area, a service gateway (SGW #2) belonging to a public network may be selected.

Thereafter, in the case of a dedicated network use target, a packet data network gateway (PGW) may be selected based on location information (TAC) as follows. For example, in the case of a dedicated network area, a dedicated network access point name (APN) conversion operation may be performed to select a packet data network gateway (PGW) belonging to the dedicated network. In the case of being outside the dedicated network use area, a packet data network gateway (PGW) belonging to the dedicated network may be selected without performing an access point name (APN) conversion operation.

When connecting from a dedicated network area, the access point name (APN) for connection to the IMS data network for voice calls selects the packet data network gateway (PGW #2) belonging to the public network in the same way as general customers, but inside the dedicated network The access point name (APN) of the Internet data network (Internet) for data used in can select the packet data network gateway (PGW #1) belonging to the dedicated network through an access point name (APN) conversion operation. Then, when moving outside the dedicated network usage area, handover occurs between base stations (eNBs) at the boundary between the dedicated network and the commercial network. You can request disconnection from the internet data network using the dedicated network.

When the handover procedure is completed, the mobile terminal, base station (eNB), mobility management entity server (MME), service gateway (SGW), and packet data network gateway (PGW) all connect to the access point name (APN) for the IMS data network. When the user accesses the Internet again, the service can be provided through the access point name (APN) for the Internet data network, just like regular customers.

4 illustrates a case in which a handover from a public network to a dedicated network is requested.

As shown, a portable terminal (smart phone, private network customer) is connected to a service gateway (SGW #2) of a public network. A portable terminal (smart phone) accesses an Internet data network (Internet) and an IMS data network (IMS) through a public network.

When the portable terminal (smartphone) moves into the dedicated network, the portable terminal is connected to the service gateway (SGW #1) of the dedicated network and provides Internet data network (Internet) through the packet data network gateway (PGW #1) of the dedicated 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 (smartphone) through the packet data network gateway (PGW #2) of the public network. At this time, according to the policy of the private network , Connection to the Internet data network (Internet) by being connected to the packet data network gateway (PGW #2) of the public network through the service gateway (SGW #1) of the private network can be blocked.

As in the example of FIG. 3, even in the handover process shown in FIG. 1, #2) can be managed.

Specifically, since access is made from outside the dedicated network use area, services belonging to the public network are used by using the access point name (APN) for the IMS data network and the access point name (APN) for the Internet data network, just like regular customers. Gateway (SGW #2) and Packet Data Network Gateway (PGW #2) can be selected. Thereafter, when moving to a dedicated network area, handover occurs between base stations (eNBs) at the boundary between the public network and the private network. You can request disconnection of the access point name (APN) for the Internet data network.

When the handover procedure is completed, the mobile terminal, base station (eNB), mobility management entity server (MME), service gateway (SGW), and packet data network gateway (PGW) all connect to the access point name (APN) for the IMS data network. If the customer accesses the Internet again, the service will be provided through the access point name (APN) for the Internet data network through the dedicated network after performing the APN conversion function because it is an area where the dedicated network is used. can

5 describes processing data required to process handover between a dedicated network and a public network. In FIGS. 3 and 4 , when a handover occurs between the dedicated network and the public network, the mobility management subject server (MME) should be able to detect it.

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

Also, referring to (b), the location information (TAC) will be described when handover between the dedicated network and the public network occurs. A table for selecting a service gateway (SGW) belonging to a dedicated network and a table for converting an access point name (APN) for using an Internet data network of a dedicated network may be included.

Comparing (a) and (b), it can be seen that for the handover between the private network and the public network, the private network identifier and location information (TAC), which indicate whether the private network is a customer, are additionally considered.

6 illustrates a call processing process when a dedicated network customer accesses a dedicated network area. Here, the call processing process described in FIG. 6 may refer to the communication network structure described in FIG. 2 .

First, when a portable terminal 48' located in a dedicated network area transmits an Attach Request signal to a base station 46C in the corresponding area, the mobile terminal 48''s unique identification information is sent to the mobility management subject server 44. (eg, IMSI for subscriber identification/authentication). At this time, location information (TAC, H'1) of the dedicated network area may be delivered together.

The mobility management subject server 44 may check 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 may inform the mobility management subject server 44 whether the portable terminal 48' is a dedicated network subscriber through a response signal (Update Location Answer).

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

The service gateway 22 belonging to the dedicated network performs a Create Session Request to the packet data network gateway 34 belonging to the commercial network/public network in response to the IMS Create Session Request, and connection can be made.

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 selects the packet data belonging to the private network. A session creation request is transmitted to the network gateway 24. The mobility management subject server 44 designates an access point name (APN) according to the dedicated network policy, and in response thereto, a connection to the packet data network gateway 24 belonging to the dedicated network can be made.

7 illustrates a process of processing a call when a dedicated network customer accesses from outside the dedicated network. Here, the call processing process described in FIG. 7 may refer to the communication network structure described in FIG. 2 .

First, when the portable terminal 48 located in a public/commercial network area transmits an Attach Request signal to the base station 46B in the corresponding area, the mobility management subject server 44 receives unique identification information of the portable terminal 48. (eg, IMSI for subscriber identification/authentication). At this time, location information (TAC, H'2) of the public network/commercial network area may be transmitted together.

The mobility management subject server 44 may check 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 may inform the mobility management subject server 44 whether the portable terminal 48' is a dedicated network subscriber through a response signal (Update Location Answer).

The mobility management subject server 44 may transmit an IMS Create Session Request to the service gateway 32 belonging to the commercial network/public network. At this time, it is according to the setting information that the mobility management subject server 44 can select the service gateway 32 belonging to the commercial network/public network. For example, a connection request from location information (TAC, H'2) of a commercial network/public network area is configured to select a service gateway (#2, 32) belonging to a commercial 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 commercial network/public network in response to the IMS Create Session Request, Data network connection 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/commercial network and does not perform an access point name (APN) change procedure for the dedicated network subscriber. . Then, using the access point name (APN) for using the commercial network/public network, a session creation request is made to the service gateway 32 belonging to the commercial network/public network and the packet data network gateway 34 belonging to the commercial network/public network (Create Session Request) let this be passed on.

8 illustrates a call processing process when a dedicated network customer moves from a dedicated network area to an outside of the dedicated network. Here, the call processing process described in FIG. 8 may refer to the communication network structure described in FIG. 2 .

The connection to the IMS data network (IMS PDN) can be maintained, but the Internet data network (Internet PDN) needs to be re-established according to the dedicated network policy.

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

The base station 46B in the commercial/public network area transfers a path switch request including location information (TAC, H'2) to the mobility management subject server 44, and the mobility management subject server 44 The Internet data network (Internet PDN) used in the dedicated network area is changed to be used in the commercial/public network area.

First, the mobility management subject server 44 transmits a session deletion request to the service gateway 22 belonging to the dedicated network. The service gateway 22 belonging to the private network transmits a session deletion request to the packet data network gateway 24 belonging to the private network so that the existing connection is blocked.

Thereafter, the mobility management subject server 44 transmits a Create Session Request to the service gateway 32 belonging to the commercial network/public network. In response to this, the service gateway 32 belonging to the commercial network/public network transfers a bearer modification request to the packet data network gateway 34 belonging to the commercial network/public network.

9 illustrates a call processing process when a dedicated network customer moves from outside the dedicated network to a dedicated network area. Here, the call processing process described in FIG. 8 may refer to the communication network structure described in FIG. 2 .

The connection to the IMS data network (IMS PDN) can be maintained, but the Internet data network (Internet PDN) needs to be re-established according to the dedicated network policy.

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

The base station 46C in the dedicated network area transfers a path switch request including location information (TAC, H'1) to the mobility management subject server 44, and the mobility management subject server 44 transfers the path change request including the location information (TAC, H'1) to the dedicated network area. Perform a change procedure to use the Internet data network (Internet PDN) used in the commercial/public network area.

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

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 to this, the service gateway 22 belonging to the dedicated network transfers a bearer modification request to the packet data network gateway 34 belonging to the commercial network/public network.

In addition, the mobility management subject server 44 transmits a Path Switch Request Ack for the Internet data network (Internet PDN) to the base station 46C belonging to the dedicated network, and the base station 46C transmits a service belonging to the dedicated network. The gateway 22 may be induced to request creation of a new session.

The method according to the above-described embodiment may be produced as a program to be executed on a computer and stored in a computer-readable recording medium. Examples of the computer-readable recording medium include ROM, RAM, CD-ROM, and magnetic tape. , floppy disks, optical data storage devices, and the like, and also includes those implemented in the form of carrier waves (for example, transmission through the Internet).

The computer-readable recording medium is distributed to computer systems connected through a network, so that computer-readable codes can be stored and executed in a distributed manner. In addition, functional programs, codes, 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 is apparent to those skilled in the art that the present invention can be embodied in other specific forms without departing from the spirit and essential characteristics of the present invention.

Accordingly, the above detailed description should not be construed as limiting in all respects and should be considered illustrative. The scope of the present invention should be determined by reasonable interpretation of the appended claims, and all changes within the equivalent scope of the present invention are included in the scope of the present invention.

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

Claims (27)

Receiving a handover request of a portable terminal by a base station installed in a dedicated network or a public network; and
When the handover occurs from the private network to the public network, the service gateway of the public network maintains the connection between the mobile terminal and the IMS data network of the public network connected through the service gateway of the private network before the handover occurs. Blocking data traffic between the portable terminal and the Internet data network of the private network in response to the dedicated network policy
A method for providing portable terminal handover corresponding to a dedicated network policy, comprising: According to claim 1,
When the handover occurs from the public network to the private network, the service gateway of the private network maintains the connection between the portable terminal and the IMS data network of the public network connected through the service gateway of the public network before the handover occurs. In response to the dedicated network policy, blocking Internet access through the dedicated network between the portable terminal and the Internet data network of the public network.
A method for providing portable terminal handover corresponding to a dedicated network policy, further comprising: According to claim 2,
Blocking the Internet access
blocking a connection to a service gateway and a packet data network gateway of the public network to which the portable terminal is connected; and
Attempting connection to a service gateway and a packet data network gateway of the dedicated network
A method for providing portable terminal handover corresponding to a dedicated network policy, comprising: According to claim 1,
Blocking the data traffic
blocking an attempt to connect to a service gateway and a packet data network gateway of the dedicated network to which the portable terminal is connected; and
requesting a connection to a service gateway of the public network;
A method for providing portable terminal handover corresponding to a dedicated network policy, comprising: According to claim 1,
Handover between the public network and the private network is recognized through location information (Tracking Area Code, TAC) included in the handover request of the portable terminal, According to claim 5,
Wherein the handover occurs in a tracking area (TA) unit rather than a cell unit, a portable terminal handover providing method corresponding to a dedicated network policy. According to claim 1,
The handover occurs between cells (base stations), and data traffic is blocked in response to whether or not the portable terminal joins a dedicated network. 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 dedicated network;
blocking the connection with the public network when the portable terminal is the subscriber;
performing the Internet connection request through a service gateway and a packet data network gateway of the dedicated network;
A method for providing portable terminal handover corresponding to a dedicated network policy, further comprising: According to claim 1,
In response to a new Internet connection request through the public network, performing the Internet connection request through a service gateway and a packet data network gateway of the public network.
A method for providing portable terminal handover corresponding to a dedicated network policy, further comprising: According to claim 1,
When the handover occurs within the dedicated network or within the public network, maintaining the data network connection in response to the data network connection request of the portable terminal, wherein the mobile terminal handover corresponding to the private network policy How to provide. According to claim 1,
The data traffic is generated through an Internet public data network (PDN) or a default data network (Default PDN). According to claim 11,
The method of claim 1 , wherein among the data traffic generated through an IP Multimedia Subsystem (IMS) PDN is continuously transferred to the portable terminal despite the handover. a mobility management subject server that receives a handover request from a portable terminal and determines handover processing in response to a dedicated network policy;
a home subscriber server that checks whether the portable terminal is a dedicated network subscriber;
at least one service gateway that performs a session request in response to call processing related to the handover confirmed through the mobility management principal server and the home subscriber server; and
including at least one packet data network gateway that secures a data network connection in response to a session request transmitted from the service gateway;
When the handover occurs between the private network and the public network, the mobility management subject server maintains the connection between the portable terminal and the IMS data network of the public network connected through the service gateway of the private network before the handover occurs. , A communication network device for data network management that blocks the data network connection made through either the private network or the public network and attempts the data network connection through the other one of the private network or the public network. According to claim 13,
The mobility management subject server determines whether to use the dedicated network or the public network through location information (Tracking Area Code, TAC) and private network subscriber identification information included in the handover request. Communication network device for data network management. According to claim 14,
Where the handover occurs in a tracking area (TA) unit rather than a cell unit, a communication network device for data network management. According to claim 14,
The mobility management subject server selects the service gateway belonging to either the dedicated network or the public network in response to location information (Tracking Area Code, TAC) and private network subscriber identification information included in the handover request, data network Network devices for management. According to claim 13,
When the handover occurs between cells (base stations), the communication network device for managing the data network blocks the data network connection in response to the private network subscriber identification information of the portable terminal. According to claim 13,
The mobility management subject server changes an access point name (APN) in response to location information (Tracking Area Code, TAC) and dedicated network subscriber identification information included in the handover request, for data network management network device. According to claim 13,
When the handover occurs within the dedicated network or within the public network, the mobility management subject server maintains a data network connection in response to a data network connection request of the portable terminal. According to claim 13,
The data network connection includes an Internet public data network (PDN) or a default data network (Default PDN). According to claim 20,
In the case of an IP Multimedia Subsystem (IMS) PDN among the data network connections, the service gateway belonging to the dedicated network selects the packet data network gateway belonging to the public network to provide continuous service to the portable terminal despite the handover. network device for data network management. According to claim 13,
The mobility management subject server is a communication network device for data network management that interworks with a plurality of base stations. delete delete delete delete delete

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