KR20160041475A - Managing method for tunneling information of local breakout, service server for the same - Google Patents

Abstract

The present invention relates to a local break out system, and more particularly to a method of managing tunneling information for a local break out, which manages tunneling information using a message related to the terminal and generated between a connection network and a core network and considers a terminal mobility, thereby being able to provide a continuous local break out service, and a service server for the method. For this purpose, according to one embodiment of the present invention, a service server which is connected between a connection network and a core network, monitors messages transmitted and received between the connection network and the core network, and then provides a local break out service toward a connected external server may be configured to comprise: a monitoring unit which monitors and detects the messages transmitted and received by the connection network and the core network; a service zone determination unit which determines ingression to a service zone, egression from the service zone, movement within the service zone with respect to a terminal, using the messages detected via the monitoring unit; and a tunneling information management unit which generates tunneling information regarding the terminal based on a result of the determination performed by the service zone determination unit, or deletes or modifies previously stored tunneling information corresponding to the terminal.

Description

TECHNICAL FIELD [0001] The present invention relates to a tunneling information management method for local breakout, and a service server for the tunneling information management method.

The present invention relates to a local breakout system, and more particularly, to a method and apparatus for managing a tunneling information by using a message related to a terminal generated between an access network and a core network to provide a continuous local breakout service A method for managing tunneling information for local breakout, and a service server therefor.

The contents described in this section merely provide background information on the present embodiment and do not constitute the prior art.

Generally, a mobile communication system has been developed to provide voice service while ensuring the user's activity. However, the mobile communication system is gradually expanding not only to voice but also to data service, and now it has developed to the extent of providing high-speed data service. However, in a mobile communication system in which a service is currently provided, a lack of resources and users demand higher speed services, and therefore, a more advanced mobile communication system is required.

In response to this demand, LTE (Long Term Evolution), which is a next generation mobile communication system, has been highlighted. LTE is a technology for implementing high-speed packet-based communication with a transmission rate of up to 100 Mbps. Mobile data traffic using the LTE network is transmitted to the Internet network via an EPC (Evolved Packet Core), which is an LTE core network.

Meanwhile, data traffic has been exploding in recent years due to the emergence of various types of mobile devices such as smart phones and tablet PCs. Since mobile data traffic using LTE network is transmitted through EPC, the increase of mobile data traffic causes overload of traffic in core network. In general, when data is transmitted through the core network, the user has to pay a relatively large data usage fee.

Accordingly, local breakout techniques have been proposed for off loading traffic concentrated in the core network in various ways.

However, there is a problem that local break-out techniques to date are for traffic distribution concentrated in the core network, and it is difficult to provide a local-based specialized service. Also, there is a problem in that a core network or a base station There is a problem that the design change is required and the mobility of the terminal can not be considered.

Korean Patent Publication No. 2014-0018091, published on Feb. 12, 2014 (name: Traffic offloading method and apparatus considering congestion in a wireless communication system)

SUMMARY OF THE INVENTION The present invention has been proposed in order to solve the above problems, and it is an object of the present invention to provide a method and apparatus for managing tunneling information using a message related to a terminal generated between an access network and a core network, A tunneling information management method for a local breakout that can provide a continuous local breakout service in consideration of the mobility of the terminal, such as movement of a service area, movement out of the service zone, movement into a service zone, The purpose is to do.

However, the object of the present invention is not limited to the above-mentioned objects, and other objects not mentioned can be clearly understood from the following description.

In order to accomplish the above object, the present invention provides a service for monitoring a message transmitted / received between the access network and the core network, which is connected between an access network and a core network according to an embodiment of the present invention and providing a local break- 1. A server comprising: a monitoring unit monitoring and detecting a message transmitted and received between the access network and a core network; A service zone determination unit for determining a service zone entry, a service zone departure, and a movement within the service zone using the message detected by the monitoring unit; And a tunneling information manager for generating tunneling information for the terminal or deleting tunneling information previously stored corresponding to the terminal according to a result determined through the service zone determiner.

According to another aspect of the present invention, there is provided a method for managing tunneling information for local breakout, the method comprising: monitoring a message transmitted between an access network and a core network, A service server for providing a local break-out service to an external server, comprising: a message detection step of monitoring and detecting a message transmitted and received between the access network and the core network; A zone determination step of determining whether the mobile station is in a service zone, a service zone departure, and a movement in a service zone using the detected message; And a tunneling information management step of generating tunneling information for the terminal or deleting or changing tunneling information previously stored corresponding to the terminal according to the determined result.

Further, the present invention can provide a computer readable recording medium on which a program for executing the tunneling information management method for local breakout as described above is recorded.

According to the method for managing tunneling information for local breakout of the present invention, a service server for the local breakout detects a message related to a terminal occurring between an access network and a core network, and manages tunneling information for providing a local breakout service There is an effect that uplink direction and downlink direction packet processing can be performed without changing the design of the access network or the core network.

In addition, according to the present invention, various types of handover messages generated in consideration of mobility of a terminal are detected, and tunneling information for providing a local breakout service is managed using the detected various types of handover messages, It is possible to provide a local break-out service without any effect.

In addition, various effects other than the above-described effects can be directly or implicitly disclosed in the detailed description according to the embodiment of the present invention to be described later.

1 is a diagram illustrating a network structure to which a tunneling management method for local breakout according to an embodiment of the present invention is applied.
2 is an exemplary diagram illustrating a handover process in a network structure to which a packet processing method for local breakout according to an embodiment of the present invention is applied.
FIG. 3 is a block diagram illustrating a main configuration of a service server according to an embodiment of the present invention, and FIG. 4 is a block diagram illustrating a configuration of a controller of a service server according to an exemplary embodiment of the present invention.
FIG. 5 is a flowchart illustrating a tunneling information management method for local breakout according to an embodiment of the present invention. Referring to FIG.
6 is a flowchart illustrating a tunneling information management method for local breakout according to an embodiment of the present invention.
7 is a flowchart illustrating a tunneling information management method for local breakout according to another embodiment of the present invention.
8 is a data flow chart for explaining a method for managing tunneling information using a handover message generated in an X2 handover procedure according to an embodiment of the present invention.
9 is a data flow chart for explaining a method for managing tunneling information using a handover message generated in an S1 handover procedure according to an embodiment of the present invention.
10 is a data flow chart for explaining a packet processing process using tunneling information according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the detailed description of known functions and configurations incorporated herein will be omitted when it may unnecessarily obscure the subject matter of the present invention. This is to omit the unnecessary description so as to convey the key of the present invention more clearly without fading. While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail. However, it should be understood that the invention is not limited to the specific embodiments thereof, It is to be understood that the invention is intended to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

Also, terms including ordinal numbers such as first, second, etc. are used to describe various elements, and are used only for the purpose of distinguishing one element from another, Not used. For example, without departing from the scope of the present invention, the second component may be referred to as a first component, and similarly, the first component may also be referred to as a second component.

In addition, when referring to an element as being "connected" or "connected" to another element, it means that it can be connected or connected logically or physically. In other words, it is to be understood that although an element may be directly connected or connected to another element, there may be other elements in between, or indirectly connected or connected.

Also, the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. It is also to be understood that the terms such as " comprising "or" having ", as used herein, are intended to specify the presence of stated features, integers, It should be understood that the foregoing does not preclude the presence or addition of other features, numbers, steps, operations, elements, parts, or combinations thereof.

A tunneling information management method for local breakout according to an embodiment of the present invention and a service server for the tunneling information management method will now be described in detail with reference to the drawings. Here, the same reference numerals are used for similar functions and functions throughout the drawings, and a duplicate description thereof will be omitted.

First, a network structure to which a tunneling management method for local breakout according to an embodiment of the present invention is applied will be described.

1 is a diagram illustrating a network structure to which a tunneling management method for local breakout according to an embodiment of the present invention is applied.

In FIG. 1, the network of the present invention can be implemented so that a user can use a communication service while moving. For example, it may be a long term evolution (LTE) network that is currently commercialized, or may include other networks equivalent to this, or a combination of various types of networks.

In this network structure, a service server 600 supporting a tunneling management method for local breakout according to an embodiment of the present invention is located between an access network 200 and a core network 400, And supports transmission and reception of information with the external server 700.

Each element in the network structure to which the tunneling management method for local breakout according to an embodiment of the present invention is applied will be described in more detail. First, the UE 100 refers to a user equipment The access network 200 and the core network 400 and can transmit and receive information to and from a server (not shown) providing a specific service through the Internet network 500. At this time, the UE 100 is connected to the EPC 450 of the core network 400 through the eNBs 201a, 210b, ... of the access network 200, And is connected to the Internet network 500. The UE 100 of the present invention may include a browser for transmitting and receiving information, a memory for storing programs and protocols, and a microprocessor for executing and controlling various programs.

In addition, the UE 100 described herein may be a terminal, a mobile station (MS), a mobile terminal (MT), a subscriber station (SS), a portable subscriber station , An access terminal (PSS), an access terminal (AT), or the like, and may include all or some of functions of a mobile terminal, a subscriber station, a mobile subscriber station, and the like. The UE 100 may be classified into a smart phone, a tablet PC, a PDA (personal digital assistant), and a portable multimedia player (PMP) according to its implementation.

The access network 200 supports the connection of the UE 100 to the core network 400 and may include a plurality of eNBs (eNodeBs 210a, 210b, ...). Here, the plurality of eNBs 210 may be a concept including a base station controller and a base station controller supporting the connection of the UE 100. [ In addition, the eNB 210 may be replaced with a base station controller such as a base station (BS), a base transceiver station (BTS), a NodeB, and a base station controller such as a BSC (Base Station Controller) or an RNC (Radio Network Controller). Alternatively, the digital signal processing unit and the radio signal processing unit integrally implemented in the eNB 210 may be divided into a digital unit (DU) and a radio unit (RU) And a plurality of RUs are connected to a centralized DU. An example in which the access network 200 is implemented as a DU and an RU will be described in more detail with reference to FIG.

The core network 400 manages user information subscribed to the communication service provided by the network, performs main functions for call processing, mobility control and switching between the access networks 200, And the Internet network 500 in accordance with the present invention. The core network 400 may include a plurality of entities that perform the functions described above. For example, the core network 400 includes a Mobility Management Entity (MME) 410, an S-GW (Serving Gateway) 420 and a P-GW (Packet Data Network Gateway) A mobile switching center (MSB), a home location register (HLR), a home subscriber server (HSS), and the like.

The MME 410, the S-GW 420, and the P-GW 430, which are the main constituent elements of the core network 400 shown in the figure, are referred to as an EPC (Evolved Packet Core) .

First, the MME 410 refers to a mobility management apparatus that manages the mobility of the UE 100. The MME 410 includes a non-access signaling (NAS), a NAS signaling security (Signaling Security), mobility management of UE 100, location related to idle mode UE, roaming related, authentication, bearer management, and the like. In addition, when a user desires to use a data service using the UE 100, the UE 100 may perform a paging function.

The S-GW 420 refers to a serving gateway that processes traffic for a plurality of eNBs 210. In addition, it is interlocked with the P-GW 430, supports data transmission / reception with the UE 100, and can perform an anchoring function when a handover occurs.

The P-GW 430 refers to a packet data network gateway that processes traffic between a core network 400 to which the core network 400 belongs and another network other than the core network 400 to which the core network 400 belongs, for example, the Internet network 500. The P-GW 430 includes a service policy enforcement, a per-user based packet filtering, a charging support, a lawful interception, a user terminal IP allocation allocation, packet screening, and the like. In addition, the UE 100 performs different QoS policies for each UE 100, and controls traffic and the like.

In addition, the MME 410 can send and receive messages through the S1 Application Protocol (S1AP). At this time, it may be connected to the S-GW 420 through the S1-U interface, and may be connected to the P-GW 430 through the S5 interface.

The Internet 500 is a conventional public network in which information is exchanged in accordance with the TCP / IP protocol, and can be established via one or more of wired, wireless, and optical communication technologies, and can be an instant messaging service, an Internet portal service, , E-commerce service, and the like can be provided based on the Internet network 500. Particularly, in the Internet network 500, a content providing apparatus (not shown) of a content provider (CP) that holds a plurality of contents and provides the contents to a user may be connected.

In addition, a packet transmitted by the UE 100 or a packet destined to the UE 100 on the access network 200 and the core network 400 may be tunneled differently from the Internet network 500 and transmitted. The GTP tunneling scheme will be briefly described as an example. However, the present invention is not limited to the tunneling scheme, and may be applied to various tunneling schemes such as IPinIP tunneling (GIn tunneling), GRE tunneling (Generic Routing Encapsulation), and the like.

The UE 100 transmits an IP packet including the source address information (= the address information of the UE 100) and the destination address information to the access network 200 when the UE 100 transmits a packet to the core network 400. At this time, the packet includes an IP header and an IP payload including data. The IP header includes an SIP (Source IP) which is source address information (= address information of the UE 100) and destination address information DIP (Destination IP).

The eNB 210 of the access network 200 receives the GTP tunnel for the GTP tunneling and adds the GTP header for GTP tunneling to the packet transmitted from the UE 100 in order to tunnel and transmit the IP packet according to the tunneling mode, To the S-GW 420 of the core network 400. The converted GTP packet may be configured to include a GTP header, which is a header added by the eNB 210, and a packet originally sent by the UE 100. The GTP header, which is a header added by the eNB 210, (SIP = eNB, DIP = S-GW), a UDP header, and a GTP header (TEID = X).

The S-GW 420 receiving the GTP packet from the eNB 210 re-transmits the Outer IP header and the GTP header to the P-GW 43. At this time, the S-GW 420 re-checks the Outer IP header as SIP = S-GW and DIP = P-GW, and re-transmits the GTP header as TEID-Y.

Then, the P-GW 430 removes the GTP header, converts the GTP header into an original IP packet transmitted by the UE 100, and transmits the IP packet to the content providing apparatus (not shown) corresponding to the destination address via the Internet network 500 ) To transmit the packet.

Conversely, even when a packet is delivered from the Internet 500 to the UE 100, the GTP header is further added from the Internet network 500 to the core network 400 that has received the IP packet destined for the UE 100 And transmits the GTP packet to the eNB 210 of the access network 200. The eNB 210 of the access network 200 receives the GTP packet and removes the GTP header for GTP tunneling from the received GTP packet, IP packet and transmits the packet to the UE 100 through the radio section.

The system supporting the tunneling management method for local breakout according to the embodiment of the present invention is characterized in that in the network structure described above, the switching device 300 located between the access network 200 and the core network 400, And a service server 600 interworking with the external server 700 and connected to the external server 700.

The switching device 300 is located between the transmission network 200 and the core network 400 and is connected to the service server 600. The switching device 300 monitors packets transmitted and received under the control of the service server 600, and can selectively transmit only a specific packet to the service server 600.

For example, the switching device 300 monitors and detects a packet transmitted from the UE 100 to the core network 400, and when the packet is a packet that can be processed by the external server 700, And can transmit the packet to the service server 600. For example, if the port number of the TCP header of the packet transmitted from the UE 100 to the core network 400 is a port number that can be processed by the external server 700 (for example, 80 ports) 300 may block access of the packet to the core network 400 and may forward the packet to the service server 600. Under the control of the service server 600, the switching device 300 monitors packets transmitted and received between the access network 200 and the core network 400, extracts only messages according to the S1 application protocol, To the service server 600.

Particularly, the switching device 300 according to the embodiment of the present invention monitors and detects a message necessary for managing tunneling information among transmitted and received messages, and transmits the detected message to the service server 600 .

In addition, the switching device 300 may perform a role of delivering a packet transmitted from the service server 600 to the UE 100. [

In addition, the exemplary embodiment of the present invention will be described focusing on a configuration in which the switching device 300 monitors and detects packets, and selects and delivers the detected packets to the service server 600. However, the present invention is not limited thereto, The switching apparatus 300 monitors all the uplink or downlink packets transmitted and received between the access network 200 and the core network 400 and transmits the monitored uplink packet to the service server 600, And transmits the packet to the UE 100 only.

The service server 600 is located between the switching device 300 and the external server 700. The service server 600 may generate a control command for selective traffic processing and transmit the control command to the switching device 300. When the selected packet is received from the switching device 300 according to the control command, the received packet is processed to be transmitted to the external server 700.

At this time, the packet transmitted by the UE 100 through the switching device 300 may be a second type packet having a second type header appended to the first type packet. The service server 600, The second format packet is restored to the first format packet and the restored format packet is transmitted to the external server 700. [

In addition, when a first type packet transmitted from the external server 700 to the UE 100 is received, a second type header is generated using the previously stored tunneling information corresponding to the UE 100, Converts the packet into a second format packet to which the second format header is added, and transmits the converted format packet to the switching device 300.

Here, the first type packet is a Transmission Control Protocol / Internet Protocol (TCP / IP) packet, the second type packet is a General Packet Radio Service Tunneling Protocol (GTP) packet, and the second type header is a GTP header .

In addition, the service server 600 according to an embodiment of the present invention generates tunneling information for the UE 100 using the message when the tunneling information management message is received through the switching device 300, The mobile station 100 may perform a process of changing the tunneling information previously stored corresponding to the mobile station 100 or deleting the tunneling information previously stored corresponding to the UE 100. [ As described above, the tunneling information is information necessary for the service server 600 to convert the first format packet transmitted from the external server 700 into the second format packet, and is transmitted from the external server 700 Since the packet that can be processed by the eNB 210 of the access network 200 is a GTP packet, the service server 600 transmits a packet provided by the external server 700 to the UE 100 It is necessary to perform a process of converting into a GTP packet. That is, the service server 600 processes the packet transmitted from the external server 700 to the UE 100 as if it is a packet provided by the core network 400, and transmits the packet to the UE 100 through the switching device 300 In order to perform such a process, tunneling information must be established and managed for each UE 100 in advance.

The service server 600 according to an embodiment of the present invention uses a message generated in association with the UE 100 between the access network 200 and the core network 400, By managing the tunneling information, accurate packet processing becomes possible even in a situation where the UE 100 moves. A more specific process of managing the tunneling information using the handover message will be described later.

The external server 700 means a company network server previously subscribed to a communication service provided by the service server 600 according to an embodiment of the present invention. The external server 700 may be located in a specific area, or may be provided with a specialized Service.

Hereinafter, the handover process in the network structure in which the access network 200 is implemented as the DU and the RU will be briefly described.

2 is an exemplary diagram illustrating a handover process in a network structure to which a packet processing method for local breakout according to an embodiment of the present invention is applied.

As described above, the access network 200 may be implemented as a base station, such as one or more eNBs 210. [ The base station includes an RU 212 for processing a radio signal, DUs 211a and 211b for converting a radio signal into digital data and performing data processing according to a communication protocol, ). The RU 212 is a remote radio head (RRH), and the DU 211 is also referred to as a BBH (Base Band Unit).

The DU 211 and the RU 212 may be integrally implemented in the same place, but may be separately implemented as described above. The DU 211 and the RU 212 are physically connected to a service area remote from the DU 211 and the UU 211 is physically connected to an optical link or UTP unshielded And a plurality of FAs and sector signals may be muxed between the DU 211 and the RUs 212. The DUs 211 and 212 may be connected to each other by a wire such as a twisted pair.

One centralized DU 211 is installed in each of a plurality of cells divided into communication coverage units to provide a plurality of RUs 212 for performing a radio connection process with the UE 100 located in the communication coverage of the corresponding cell And performs digital processing of a signal received from the UE 100 wirelessly transmitted and received through the corresponding RU 212 or a signal to be transmitted to the UE 100. [ In addition, although a plurality of RUs 212 are connected to one DU 211 in the drawing, as described above, the DUs 211 are concentrated in a centralized form, and the DUs 211 are divided into a plurality of And may be in the form of a one-to-one mapping with the RU 212. The DU 211 may include a DU ID, i.e., base station identification information, which can be distinguished from each other in correspondence with the respective RUs 212.

In addition, a plurality of RUs 212 connected to one centralized DU 211 process wireless signals in a certain cell. For example, a process such as frequency up conversion and frequency down conversion can be performed. In addition, the cell coverage covered by each RU 212 may be divided into a plurality of cell areas, and each cell area may include cell information (Cell ID) that can be distinguished from each other.

In this network structure, the UE 100 can perform a handover process in which a cell is changed according to movement.

For example, if the area of Cell 1 of DU1 211a is a previously designated service zone and the area of Cell 3 of DU1 211a is also a predefined service zone, If the handover process occurs by moving from the area of Cell 3 to the area of Cell 3, even if the UE 100 located in the cell 1 moves to the cell 3, the service server 600 moves within the same service zone, ) To provide continuous service.

On the other hand, when the UE 100 moves from the Cell 3 corresponding to the service zone to the Cell 5 which does not correspond to the service zone, the service server 600 performs handover of the UE 100, Is a handover that deviates from the service zone, the service to be provided must be stopped.

For this, the service server 600 according to the embodiment of the present invention transmits a message generated between the access network 200 and the core network 400, in particular, a handover message And then generates, changes or deletes the tunneling information for providing the service using the extracted information.

More detailed management procedures of tunneling information will be described below.

Hereinafter, the main configuration and operation method of the service server 600 according to the embodiment of the present invention will be described.

FIG. 3 is a block diagram illustrating a main configuration of a service server according to an embodiment of the present invention, and FIG. 4 is a block diagram illustrating a configuration of a controller of a service server according to an exemplary embodiment of the present invention.

1 and 3, a service server 600 according to an embodiment of the present invention includes a first interface unit 610 and a second interface unit 620 for communication, a control unit 630, and a storage unit 640).

More specifically, the first interface unit 610 is connected between the access network 200 and the core network 400. More precisely, the first interface unit 610 may be connected between the access network 200 and the core network 400 through the switching device 300, as shown in FIG.

The second interface unit 620 supports connection with the external server 600.

The control unit 630 performs overall control of the service server 600 and includes at least one processor including a CPU (Central Processing Unit) / MPU (Micro Processing Unit) and at least one memory loading data (For example, a register and / or a RAM (Random Access Memory)) and a bus (BUS) for inputting / outputting at least one or more data to / from the processor and the memory. And is loaded into the execution memory from a predetermined recording medium to perform a function defined in the service server 600 (for example, tunneling management for local breakout, packet processing function), and is processed by the processor And may include predetermined program routines or program data. In other words, in order to process the tunneling information management method for local breakout according to the embodiment of the present invention, a component that can be processed in software among the functions provided in the service server 600 is determined to be the function of the controller 630 can do.

The controller 630 of the present invention is functionally connected to at least one component provided to support the tunneling information management method for local breakout according to the embodiment of the present invention. That is, the control unit 630 is functionally connected to the first interface unit 610, the second interface unit 620, and the storage unit 640, and controls the flow of signals for supplying power and performing functions to the respective components Respectively.

4, the control unit 630 includes a monitoring unit 631, a service zone determination unit 632, a tunneling information management unit 633, and a packet processing unit 634, Lt; / RTI >

The monitoring unit 631 monitors packets transmitted and received between the access network 200 and the core network 400 and transmits the packets transmitted through the first interface unit 610 to the service zone determination unit 632 or the packet processing unit 634 via a network. In addition, the monitoring unit 631 may transmit the packet processed through the packet processing unit 634 to the first interface unit 610.

The service zone determination unit 632 determines whether the UE 100 has entered a service zone managed by the UE 100 using the message detected through the monitoring unit 631, It is possible to judge whether or not it has moved from the point of view.

In particular, the service zone determiner 632 of the present invention can determine whether the UE 100 enters a service zone, a service zone, or a service zone in two ways.

First, the service zone determination unit 632 checks the eNB 210 currently connected to the UE 100 using the detected message through the monitoring unit 631, and determines whether the connected eNB 210 corresponds to the service zone And determines whether or not the UE 100 is in the service zone entry, departure, and movement within the zone by confirming presence or absence of the tunneling information stored in advance in correspondence with the UE 100. [ That is, if the eNB 210 to which the UE 100 is currently connected corresponds to the service zone, the service zone determiner 632 determines that the UE 100 does not have tunneling information stored in advance corresponding to the UE 100, It can be determined that the tunnel is in the service zone. If there is tunneling information that is stored in advance, it can be determined that the tunnel is moving within the service zone. On the other hand, if the eNB 210 currently connected to the UE 100 does not correspond to the service zone, if there is tunneling information previously stored corresponding to the UE 100, it can be determined that the service zone is out of the service zone.

On the other hand, the service zone determiner 632 of the present invention determines that a handover has occurred from the source base station to the target base station using the message detected through the monitoring unit 631, It is determined whether the base station and the target base station correspond to the service zone, and based on the determination, it is possible to determine whether the service zone enters, departs from, or moves within the zone. That is, when only the source base station corresponds to the service zone, it can be determined that the UE 100 has moved to a zone other than the service zone in the service zone. If only the target base station corresponds to the service zone, It can be determined that the UE 100 has moved into the service zone. If both the source base station and the target base station correspond to the service zone, it can be determined that the UE 100 has moved within the service zone.

When determining that the eNB 210 to which the UE 100 is connected corresponds to the service zone, the service zone determiner 632 of the present invention extracts and confirms the base station identification information for the eNB 210, The base station identification information may be compared with the previously constructed service zone information and if the base station identification information is the base station identification information stored in the service zone information, it can be determined that the eNB 210 corresponds to the service zone. On the other hand, if the base station identification information of the eNB 210 is not stored in the service zone information, that is, the base station identification information preset in the service zone, the service zone determination unit 632 performs a process of confirming the cell information.

In other words, since there are a plurality of cell areas covered by the eNB 210, and only a specific cell among a plurality of cells may be designated as a service zone, the service zone determiner 632 determines (Cell ID), and if the confirmed cell information is cell information preset in the service zone, it can be determined that the UE 100 is located in the service zone. On the other hand, if the checked cell information is not the preset cell information as a result of checking the cell information, the service zone determiner 632 can determine that the UE 100 is located outside the service zone.

To this end, the service server 600 of the present invention can generate and manage service zone information including one or more base station identification information or cell information for a base station, which is preset in the service zone, in the storage unit 640 in the form of a table . An example of the service zone information is as follows.

Base station list Cell information in the base station Identification information (DU ID) Service Zone Configuration Cell information Service Zone Configuration 1111 Service Zone 00 - 01 - 2222 - 00 Service Zone 01 - 02 Service Zone

The service zone determiner 632 first extracts the base station identification information (more accurately, the DU ID) in the above-described message, and when the extracted base station identification information is the base station identification information preset in the service zone, It can be determined that the UE 100 is located within the service zone.

For example, when the base station identification information extracted from the handover message is 1111, since the base station corresponding to 1111 corresponds to the service zone as a result of checking the service zone information, the service server 600 does not need to check the cell information, It can be determined that the UE 100 is located in the current service zone.

On the other hand, if the extracted base station identification information is not the base station identification information preset in the service zone, for example, 2222, the base station corresponding to 2222 does not correspond to the service zone, Information (Cell ID). That is, the cell area covered by the eNB 210 may be further divided into cells. Since only a specific cell among the subdivided cells can be designated as a service zone, the service zone determiner 632 further verifies cell information, If the confirmed cell information is '00', the cell corresponding to '00' corresponds to the service zone in the service zone information, so that it can be determined that the UE 100 is located in the service zone. In contrast, since the determined cell information is '01' and the cell corresponding to '01' does not correspond to the service zone in the service zone information, the service zone determiner 632 determines that the UE 100 is currently connected to the eNB 210 ) Does not correspond to the service zone.

The tunneling information management unit 633 performs a process of generating, changing, or deleting tunneling information according to the result determined through the service zone determination unit 632. [ That is, when it is determined that the UE 100 has entered the service zone, the tunneling information management unit 633 can generate new tunneling information for the UE 100 using the message detected through the monitoring unit 631 . In addition, if it is determined that the UE 100 has deviated from the service zone, the tunneling information management unit 633 can delete the tunneling information because it does not need to manage the tunneling information for the UE 100. [ If the UE 100 determines that the UE 100 has moved within the service zone, the tunneling information management unit 633 determines that the UE 100 has moved It is possible to control the tunneling information previously stored corresponding to the UE 100 to be changed with information related to an eNB 210. [

Here, the tunneling information may include at least one of a Stream Control Transmission Protocol, a UE Context, and an E-RAB, which is information necessary for generating a GTP header. The control transmission protocol includes at least one of a mobility management apparatus IP, a mobility management apparatus port, a base station IP, and a base station port, and the terminal context includes at least one of a mobility management apparatus S1AP ID and a base station S1AP ID And the bearer information may include at least one of a bearer ID (RAB ID), a serving gateway IP, a serving gateway TEID, a base station IP, and a base station TEID.

Also, the tunneling information management unit 633 can store and manage information on the service zone as described above. That is, when a new eNB 210 corresponding to a service zone is added, information on the new eNB 210 can be managed to be included in the service zone information.

The service zone determiner 632 determines whether or not the service zone enters or departs from the UE 100 using the detected message through the more specific monitoring unit 631 and moves within the zone, The packet processing unit 634 processes the packet transmitted through the monitoring unit 631 to allow the external server 700 to recognize the packet, and the packet transmitted from the external server 700 To be recognized by the eNB 210 of the access network 200 can be performed.

The IP packet transmitted from the UE 100 to the core network 400 is transmitted to the eNB 210 of the access network 200 via the access network 200 as described above, GTP packets. The GTP packet is passed through the switching device 300. The switching device 300 switches the GTP packet to the core network 400 according to the control information provided by the service server 600, Blocks the transmission of the packet, and delivers the GTP packet to the service server 600.

The monitoring unit 631 can detect the GTP packet and transmit it to the packet processing unit 634. The packet processing unit 634 deletes the GTP header from the delivered GTP packet in order to deliver the delivered GTP packet to the external server 700 And converts the packet into an IP packet. And transfers the IP packet converted into the external server 700 corresponding to the destination address in the converted IP packet.

When the packet transmitted from the external server 700 to the UE 100 is received via the second interface 620, the packet processor 634 transmits the packet, which is transmitted from the external server 700, To the eNB 210 of the base station 200 in order to transmit the GTP packet. At this time, the packet processor 634 confirms the destination address of the IP packet transmitted from the external server 700, confirms the corresponding UE 100, and stores the pre-stored tunneling information corresponding to the UE 100 in the storage unit 640 To generate a GTP header. The monitoring unit 631 transmits the converted GTP packet to the monitoring unit 631 and transmits the converted GTP packet to the monitoring unit 631. The monitoring unit 631 transmits the GTP packet to the first interface unit 610, 200).

The process of generating the tunneling information for each UE 100 will be described in more detail below and the tunneling information 641 for each UE 100 generated by the tunneling information management unit 633 is transmitted to the storage unit 640 Stored and managed. In addition, the storage unit 640 of the present invention can store and manage the service zone information 642 as described above in the form of a table. Here, the service zone information 642 may include one or more base station identification information preset in the service zone or may include cell information (Cell ID) for the base station. In addition, the service zone information 642 may be set according to a request of the external server 700 or a user who wants to apply the local breakout service of the present invention. For example, according to a request of a user who wants to apply a local breakout service only within a specific building, identification information of the eNB 210 covering the building can be included as service zone information 642.

The storage unit 640 may be a flash memory, a hard disk, a multimedia card micro-type memory (e.g., SD or XD memory), a RAM, a ROM ROM), and the like.

3 and 4, the main components of the service server 600 have been described. However, it should be noted that the components shown in FIGS. 3 and 4 are not all essential components, and the service server 600 may be implemented by more components than the illustrated components, The server 600 may be implemented. In addition, the service server 600 may be implemented as a collection of servers supporting various functions.

In addition, the location of the components of the service server 600 shown in FIGS. 3 and 4 may be changed for convenience or for other reasons.

A processor mounted on the service server 600 according to an embodiment of the present invention can process program instructions for executing the method according to the present invention. In one implementation, the processor may be a single-threaded processor, and in other embodiments, the processor may be a multithreaded processor. Further, the processor is capable of processing instructions stored on a memory or storage device.

In addition, the service server 600 according to the embodiment of the present invention has the same hardware configuration as that of a typical Web server or a network server. However, the software includes a program module implemented through a language such as C, C ++, Java, Visual Basic, Visual C, or the like. The service server 600 may be implemented as a web server or a network server. The web server is generally connected to an unspecified number of clients and / or other servers through an open computer network such as the Internet, And a computer software (web server program) installed for the computer system. However, in addition to the above-described web server program, it should be understood as a broad concept including a series of application programs running on the web server and various databases built up in some cases. The service server 600 utilizes a web server program that is variously provided according to operating systems such as DOS, Windows, Linux, UNIX, and Macintosh to general server hardware Typical examples include a Web site used in a Windows environment, an Internet Information Server (IIS), and CERN, NCSA, and APPACH used in a UNIX environment. In addition, the service server 600 can classify service subscription information and store and manage the subscription information in a member database. Such a database can be implemented inside or outside the service server 600.

On the other hand, the memory mounted on the service server 600 stores information in the device. In one implementation, the memory is a computer-readable medium. In one implementation, the memory may be a volatile memory unit, and in other embodiments, the memory may be a non-volatile memory unit. In one implementation, the storage device is a computer-readable medium. In various different implementations, the storage device may include, for example, a hard disk device, an optical disk device, or any other mass storage device.

In addition, the term '~ module' used in the embodiment of the present invention means a software component, and '~ module' performs certain roles. By way of example, '~ module' may include components such as software components, object-oriented software components, class components and task components, and processes, functions, attributes, procedures, Routines, segments of program code, drivers, data, databases, data structures, tables, arrays, and variables. In addition, the functions provided in the components and 'modules' may be combined into a smaller number of components and '~ modules' or further separated into additional components and 'modules'.

Although the present specification and drawings describe exemplary device configurations, the functional operations and subject matter implementations described herein may be embodied in other types of digital electronic circuitry, or alternatively, of the structures disclosed herein and their structural equivalents May be embodied in computer software, firmware, or hardware, including, or in combination with, one or more of the foregoing. Implementations of the subject matter described herein may be embodied in one or more computer program products, i. E. One for computer program instructions encoded on a program storage medium of the type for < RTI ID = 0.0 & And can be implemented as a module as described above. The computer-readable medium can be a machine-readable storage device, a machine-readable storage substrate, a memory device, a composition of matter that affects the machine readable propagation type signal, or a combination of one or more of the foregoing.

Hereinafter, a tunneling information management method for local breakout according to an embodiment of the present invention will be described with reference to FIG. 5 to FIG.

Prior to the description with reference to Figs. 5 to 10, it should be noted that the UE, which is referred to in the present invention, means a UE of the user and may be replaced with another name performing a function equivalent to or similar to the UE . The eNB also means a base station and may be replaced with another name that performs an equivalent or similar function to the eNB.

Further, the MME means a mobility management apparatus, and may be replaced with another name that performs an equivalent or similar function to the MME. In addition, it should be noted that the P-GW means a packet data network gateway and the S-GW means a serving gateway, and may be replaced with other names that perform equivalent or similar functions, other than P-GW and S-GW, respectively do.

Also, the first type packet is a TCP / IP (Transmission Control Protocol / Internet Protocol) packet, the second type packet is a General Packet Radio Service Tunneling Protocol (GTP) packet, and the second type header is a GTP header Explain it.

In addition, the service server 600 according to the embodiment of the present invention is connected between the access network 200 and the core network 400, and is connected to the access network 200 and the core network 400 All messages can be monitored. At this time, the monitoring and message detection function may be performed in the switching device 300, and the service server 600 may perform only tunneling management, packet processing, and the like using a message transmitted through the switching device 300.

First, a tunneling information management method for local breakout according to an embodiment of the present invention will be schematically described with reference to FIG.

FIG. 5 is a flowchart illustrating a tunneling information management method for local breakout according to an embodiment of the present invention. Referring to FIG.

Referring to FIGS. 1 and 5, the service server 600 of the present invention monitors a message generated between the access network 200 and the core network 400 (S101), and detects a message necessary for managing the tunneling information S103). As described above, the monitoring and detecting process may be performed in the switching device 300, and the service server 600 may receive the detected handover message from the switching device 300 and may process the following processes have.

Thereafter, the service server 600 determines whether the UE 100 has entered a service zone managed by itself, out of the service zone, or moved within the service zone by using the handover message (S105). Then, the service server 600 generates tunneling information for the UE 100 according to the determined result, deletes the tunneling information stored in advance, or transmits the tunneling information stored in advance to the newly extracted tunneling information using the handover message (S107).

In addition, the message required for managing the tunneling information of the present invention may include various kinds of messages. In particular, the UE 100 may include a message including information on the currently connected eNB 210, or various kinds of messages generated in connection with the handover of the UE 100.

A process of managing tunneling information using a message including information on an eNB 210 currently connected to the UE 100 will be described with reference to FIG.

6 is a flowchart illustrating a tunneling information management method for local breakout according to an embodiment of the present invention.

1 and 6, the service server 600 of the present invention monitors a message generated between the access network 200 and the core network 400 (S201), and transmits a message necessary for managing the tunneling information, An INITIAL UE MESSAGE or a LOCATION REPORT message transmitted from the eNB 210 of the core network 200 to the MME 410 of the core network 400 at step S203.

When the initial access message or the location report message is detected, the service server 600 checks the base station identification information for the eNB 210 in the message, and the eNB 210 transmits the base station identification information to the service zone (S205).

The initial access message is a message generated in a procedure in which the UE 100 is initially connected to the core network 400 and is transmitted from the eNB 210 connected to the UE 100 to the MME 410 in the ECP 450 . In other words, in order for the UE 100 to be connected to the MME 410 via the connected eNB 210, an S1 signaling connection between the eNB 210 and the MME 410 must be preceded. The S1 signaling connection may be defined by a pair of terminal identification information (eNB UE S1AP ID, MME UE S1AP ID) that the eNB 210 and the MME 410 allocate to identify the UE 100. That is, when an ATTACH REQUEST message arrives at the eNB 210 to which the UE 100 is connected in the state that the S1 signaling connection is not established, the eNB 210 allocates itself to establish the S1 signaling connection And allocates eNB UE S1AP ID, which is terminal identification information. Then, the eNB 210 transmits an ATTACH REQUEST message to the MME 410 in the NAS-PDU field of the initial access message INITIAL UE MESSAGE.

The initial UE message at this time may be configured to include the eNB UE's S1AP ID, NAS-PDU, TAI, ECGI, and RRC Establishment Cause. In this case, the eNB UE S1AP ID is identification information for identifying the UE 100 allocated by the eNB 210 as described above, the NAS-PDU means a NAS message including an ATTACH REQUEST, ) Is in which TA (Tracking Area), ECGI is information indicating in which cell the UE 100 is located, and RRC Establishment Cause is information indicating that the UE 100 is a control signal. In addition, the NAS-PDU field may include another NAS message such as a service request message according to the type of the connection procedure.

When the INITIAL UE MESSAGE is monitored and detected, the service server 600 determines whether the UE 100 in the ECGI included in the message includes the base station identification information of the currently connected eNB 210 (more precisely, the DU identification And the service server 600 can determine whether the current position of the UE 100 is located in the service zone using the acquired base station identification information of the eNB 210. [

Meanwhile, the location report message is transmitted to the eNB 210 by the MME 410 of the EPC 450 in order to grasp the location information of the UE 100, and is transmitted as a message to be transmitted to the MME 410 by the eNB 210 , The MME 410 may transmit a Location Reporting Control message to the eNB 210 to inquire about the current location information of the UE 100. The location report control message may include location information to be reported, a report type, and the like. The eNB 210 receiving the location report message may transmit location information of the UE 100, such as EGCL and geographical location information, To the MME 410. [ The service server 600 monitors and detects the location report message and acquires base station identification information (more accurately, DU identification information) of the currently connected eNB 210 in the ECGI of the location report message do. Thereafter, the service server 600 can determine whether the current position of the UE 100 is located in the service zone using the base station identification information of the eNB 210.

Through this process, the service server 600 determines whether the eNB 210 to which the UE 100 is connected corresponds to the service zone, and determines whether tunneling information corresponding to the UE 100 exists (S207). That is, if there is no tunneling information stored in advance corresponding to the UE 100, since the UE 100 has moved to an area corresponding to the service zone in an area other than the service zone (S209), the service server 600 And generates tunneling information for the UE 100 using the monitored message (S211).

On the other hand, if there is tunneling information previously stored corresponding to the UE 100 in step S207, it means that the UE 100 has moved in the service zone (S213). Therefore, The tunneling information can be changed (S215).

If the eNB 210 to which the UE 100 is connected does not correspond to the service zone and tunneling information corresponding to the UE 100 exists (S217), the UE 100 transmits the tunneling information in the service zone (S219), the service server 600 can delete the tunneling information for the UE 100 (S221).

In step S205, the service server 600 determines whether the service zone corresponds to the service zone by comparing the service zone information with the previously stored service zone information when determining whether the service zone information corresponds to the service zone using the base station identification information of the eNB 210 . At this time, the base station identification information does not correspond to the previously stored service zone information, and the service server 600 can further confirm the cell information (Cell ID). In this case, if the confirmed cell information also corresponds to the previously stored service zone information, even if the base station identification information is not included in the previously stored service zone information, the service server 600 determines that the eNB 210, to which the UE 100 is currently connected, It may be judged to be a zone.

The message detected in step S203 may be an initial access message or a location report message. However, the present invention is not limited thereto. If the message includes information on the eNB 210 connected to the UE 100 Any message can be applied as the message of the present invention.

In addition, the service server 600 according to the embodiment of the present invention can determine whether to enter or leave the service zone or move within the zone according to whether the information about the eNB 210 and the tunneling information are stored or not, The UE 100 may determine the service zone entry, departure, and movement within the zone by using the information of the source eNB and the target eNB.

This will be described with reference to FIG.

7 is a flowchart illustrating a tunneling information management method for local breakout according to another embodiment of the present invention.

Referring to FIG. 1 and FIG. 7, the service server 600 monitors messages generated between the access network 200 and the core network 400 (S301) as described with reference to FIG. 6, Message, e.g., a message related to a handover to the UE 100 (S303).

In step S305, the service server 600 determines whether the source base station and the target base station correspond to the service zone in the message related to the handover.

At this time, the service server 600 confirms the base station identification information for the eNB 210 in the message, determines whether the identified base station identification information corresponds to the previously stored service zone information, Can be determined. At this time, as described above, when the BS identification information does not correspond to the stored service zone information, the cell information may be further checked.

As a result, if the source base station is not the service zone but only the target base station corresponds to the service zone (S307), the service server 600 determines that the UE 100 has moved into the service zone outside the service zone (S309) , And generates tunneling information for the UE 100 using the information extracted through the message (S311).

If the source base station and the target base station both correspond to the service zone at step S313, the service server 600 determines that the UE 100 has moved within the service zone at step S315, The tunneling information may be changed to new information extracted through the message (S317).

On the other hand, if the source BS is in the service zone or only the target BS is in the service zone (S319), the service server 600 determines that the UE 100 has moved out of the service zone in the service zone (S321) 100) (S323).

Hereinafter, a process of generating, changing, or deleting tunneling information for the UE 100 using a message generated in the handover process according to an embodiment of the present invention will be described in more detail .

First, a method for managing tunneling information using a handover message generated in a handover procedure according to X2 signaling will be described.

8 is a data flow chart for explaining a method for managing tunneling information using a handover message generated in an X2 handover procedure according to an embodiment of the present invention.

Referring to FIG. 8, as described above, the switching apparatus 300 can monitor packets generated between the access network 200 and the core network 400 (S401). It is assumed that the UE 100 is currently connected to the eNB1 210a and the UE 100 is moving to the eNB2 210b and the handover procedure is in progress.

The UE 100 is connected to the eNB1 210a at step S403 and the UE 100 transmits a measurement report message to the eNB1 210a when a measurement event occurs.

Upon receiving the measurement report message, the eNB1 210a determines the target eNB to which the eNB should handover based on the signal strength information of the neighboring cell in the measurement report message and neighbor cell list information managed by the eNB1 210a (S405) And the target eNB, eNB2 210b, via X2 handover. That is, the eNB1 210a serving as the source eNB transmits a handover request message to the eNB2 210b serving as the target eNB (S407). The switching device 300 monitoring this process can detect the handover request message (S409) and deliver it to the service server 600 (S411).

The handover request message includes a target cell ID, UE context information (UE-AMBR, UE Security Capability, KeNB *, E-RAB to be setup (E-RAB ID, QCI, ARP, S1 S- , RRC Context), and UE history information. The service server 600 may include the base station identification information for the source base station, i.e., eNB1 210a, and the target cell ID using the handover request message (E. G., ENB2 210b) (S413), and compares the base station identification information with the service zone information to determine whether the target zone corresponds to the service zone.

According to the determination result, the service server 600 can determine whether the UE 100 is in a service zone entry or a service zone movement (S419) or a service zone exit (S415) Since it is no longer necessary to manage the tunneling information for the UE 100, the tunneling information is deleted (S417).

On the other hand, if it is determined that the UE 100 is entering the service zone or is moving within the zone, the service server 600 determines that the MME 410 has received the terminal identification Information (MME UE S1AP ID) and uplink S1 bearer information (S1S-GW TEID) are extracted and stored (S421).

After step S207, the UE 100, the eNB1 210a, and the eNB2 210b perform an X2 handover procedure (step S423). In other words, upon receiving the handover request message from the eNB1 210a, the eNB2 210b transmits eNB1 210a, which is the source eNB, based on the bearer information (E-RAB to be setup) included in the handover request message, GW 420 transmits the uplink S1 bearer to the S-GW 420 using the uplink S1 bearer information (S1S-GW TEID) set in the eNB1 210a, if available, Setting. In addition, the eNB2 210b allocates RRC resources (e.g., DRB ID allocation) and allocates C-RNTI values to be used by the UE 100 in the radio interval based on the E-RAB QoS information. The eNB2 210b transmits a downlink packet arriving at the eNB1 210a while the UE 100 is performing a handover (i.e., disconnecting from the eNB1 210a and connecting with the eNB2 210b) to the eNB2 210b (Downlink TEID of the X2 GTP tunnel) so that the eNB1 210a can set up an X2 transmission bearer (GTP tunnel) to forward the eNB2 210a to the eNB 210a. Then, the eNB2 210a transmits a handover request acknowledgment message including this information to the eNB1 210a, and the eNB1 210a receives the handover request message from the eNB2 210b, And establishes an X2 transmission bearer capable of delivering a downlink packet to eNB2 210b.

The eNB1 210a having prepared the handover with the eNB2 210b transmits a handover command message to the UE 100 and instructs the UE 100 to perform handover. The UE 100 detaches from the eNB1 210a and successfully connects to the eNB2 210b so that the eNB2 210b transmits the downlink packet to the UE 100. [ When the handover is completed through the above process, the eNB2 210b sends a PATH SWITCH REQUEST message to the MME 410 of the EPC 450 to request to change the bearer path.

The MME 410 receiving the notification informs that the serving cell of the UE 100 has been changed and requests the S-GW 420 to change the S1 bearer path and the S-GW 420 requests the eNB2 210b to down- The data transmission path such as setting the S1 bearer (S1 Target eNB TEID) is modified. When receiving the bearer modification response message from the S-GW 420, the MME 410 transmits a path change request acknowledgment message (PATH SWITCH REQUSET ACK) to the eNB2 210b to transmit the packet to the UE 100 (S425).

The switching device 300 monitoring this process monitors and detects the path change request message transmitted from the eNB2 210b to the MME 410 of the EPC 450 in step S427 and transmits the path change request message to the service server 600 (S429). The service server 600 extracts the downlink S1 bearer information from the path change request message, maps the uplink S1 bearer information and the downlink S1 bearer information according to the terminal identification information allocated by the MME 410 (S431).

The eNB2 210b transmits a UE Context Release Command message to the eNB1 210a at step S225 and the switching device 300 detects the UE Context Release Command message and transmits the UE Context Release Command message to the service server (S227 to S229), all the procedures for handover to the UE 100 have been completed. Therefore, using the information stored in steps S421 and S431, the tunneling information for the UE 100 is transmitted to the UE 100 Or may complete the change (S439).

When the external server 700 transmits the packet to the UE 100, the service server 600 stores the tunneling information for the UE 100 handed over to the UE 100, It is possible to transmit the correct packet to the mobile terminal.

Hereinafter, a method for managing tunneling information using a handover message generated in a handover procedure according to S2 signaling will be described.

9 is a data flow chart for explaining a method for managing tunneling information using a handover message generated in an S1 handover procedure according to an embodiment of the present invention.

9, since the handover message according to the X2 handover procedure can transmit and receive a direct message between the source base station and the target base station, confirmation of information about the source base station and the target base station is performed using one message And it can be recognized that a plurality of messages generated according to the handover procedure are handover messages related to the same terminal. Meanwhile, since the handover message generated in the S1 handover procedure can not directly transmit and receive messages between the source base station and the target base station, and always interworks with the MME 410 of the core network 400, It can not be recognized that it is an over message.

Therefore, it is necessary to check the RRC information included in the handover message.

This will be described with reference to FIG.

As described above, the switching device 300 can monitor packets generated between the access network 200 and the core network 400 (S501). It is assumed that the UE 100 is currently connected to the eNB1 210a and that the UE 100 is moving to the eNB2 210b.

The UE 100 is connected to the eNB1 210a at step S503 and the UE 100 transmits a measurement report message to the eNB1 210a when a measurement event occurs.

The eNB1 210a receives the measurement report message and determines the target eNB to which the eNB should handover based on the signal strength information of the neighboring cell in the handover and the neighbor cell list information managed by the neighboring cell list have. At this time, when the handover to the target eNB is not possible (i.e., X2 handover is impossible), S1 handover is determined (S505) and a handover required message is transmitted to the MME 410 of the EPC 450 S507). The switching server 300 monitors and detects the switching request message in step S509 and transmits it to the service server 600 in step S515. The service server 600 determines whether the eNB1 210a serving as a source base station Check the information and RRC information.

Then, the MME 410 of the EPC 450 determines the target eNB and transmits a handover request message to the target eNB, that is, the eNB2 210b. The switching device 300 can monitor and detect it, and deliver it to the service server 600 (S515 to S519).

Then, the service server 600 confirms the information about the eNB2 210b serving as the target base station and the RRC information (S521).

In the case of the S1 handover, it is difficult to determine whether the handover message detected using only one handover message is a handover message for the same UE 100 by interworking with the EPC 450. [ For this, the service server 600 according to the embodiment of the present invention uses the RRC information included in the handover request message transmitted in step S511 and the handover request message transmitted in step S517, Over message (S523).

That is, the handover required message includes Handover Type, Target eNB ID, and Source to Target Transparent Container, and the Transparent Container includes radio related information, i.e., RRC information, in the source cell.

The handover request message includes a UE-AMBR, an E-RAB to be setup (E-RAB ID, QCI, ARP, S1 S-GW TEID), a Source to Target Transparent Container, a UE Security Capability, And the Transparent Container includes radio related information in the source cell, i.e., RRC information. Through the RRC information, the service server 600 confirms that the handover request message and the handover request message are generated in response to the same terminal (S523), and transmits information about the source base station It is possible to check whether the service zone is in / out and whether the service zone is out of service by using the information on the target base station confirmed through the handover request message in steps S529 and S525.

As a result, if it is determined that the handover of the UE 100 is a service zone deviation, the service server 600 performs a process of deleting the tunneling information previously stored corresponding to the UE 100 (S525 to S527)

On the other hand, if it is determined that the handover of the UE 100 is a service zone entry / movement, the service server 600 extracts information for generating tunneling information using a message generated according to the handover of the UE 100 Process can be performed.

That is, when the S1 handover procedure is performed between the UE 100, the eNB1 201a, the eNB2 210b, and the ECP 450, the switching device 300 monitors and detects the S1 handover process and transmits it to the service server 600 The eNB2 210b that has received the handover request message from the MME 410 of the EPC 450 transmits a procedure such as S1 bearer resource allocation, indirect tunnel resource allocation, and radio resource allocation When the handover preparation is completed, the eNB 2 (210b) transmits a handover request confirmation message to the MME 410 of the EPC (450). The MME 410 receiving the request requests the S-GW 420 to generate an indirect tunnel for transmitting a downlink packet during the handover of the UE 100, and the S- When the S1 bearer is established, it notifies the MME 410 of the bearer, and the MME 410 delivers a HANDOVER COMMAND message to the eNB1 210a, which is the source base station. The eNB1 210a receiving the message transmits a message including information on a packet to be transmitted and received to the UE 100 to the MME 410 and the MME 410 delivers the message to the eNB2 210b.

When the UE 100 successfully accesses the eNB2 210b, the eNB2 210b transmits a handover notification message to the MME 410 to allow the UE 100 to successfully perform S1 handover You will be notified.

The service server 600 that has monitored this process detects a message related to the handover generated in the above process and extracts information necessary for generating the tunneling information in response to the UE 100 in a message related to the detected handover (S537). For example, in the handover request message, the UE identification information (MME UE S1AP ID) and the uplink S1 bearer information (S1S-GW TEID) allocated by the MME 410 are extracted, 410 and the downlink S1 bearer information (S1 Target eNB TEID), and then transmits the uplink S1 bearer information and the downlink S1 bearer information corresponding to the terminal identification information The UE 100 may generate tunneling information for the UE 100 or change the uplink S1 bearer information and the downlink S1 bearer information from tunneling information previously stored corresponding to the UE 100. [

When the UE context release message transmitted from the MME 410 of the EPC 450 to the eNB1 210 serving as the source base station is detected (S539 to S541), all the handover procedures for the UE 100 have been completed, The server 600 completes creation and modification of the tunneling information for the UE 100 (S545).

Thereafter, the service server 600 can perform packet processing for the local breakout in the downward direction using the generated or modified tunneling information.

That is, even when the UE 100 is connected to the eNB1 210a and the packet transmitted from the external server 700 is received through the service server 600, even if the UE 100 has moved to the eNB2 210b, It is possible to generate or change the tunneling information using the handover message generated through the handover process, so that the packet processing for the local breakout in the downward direction can be performed as shown in FIG.

At this time, the service server 600 confirms the IP address of the UE 100 by checking the destination address of the delivered IP packet (S601) when the IP packet is delivered from the external server 700 (S601). Thereafter, the service server 600 confirms the previously stored tunneling information corresponding to the corresponding UE 100 (S605). Even if the UE 100 is changed from the connected eNB1 210a to the eNB2 210b, the service server 600 generates the tunneling information for the UE 100 using the handover message as described above The GTP header can be generated using the previously stored tunneling information (S607). At this time, the service server 600 extracts the base station TEID, the base station IP, and the serving gateway TEID included in the downlink S1 bearer information for downlink traffic transmission in the tunneling information, generates a GTP header using the extracted TEID, Is added to the IP packet to be converted into the GTP packet (S609).

Then, the service server 600 can transmit the converted GTP packet to the eNB 210 of the access network 200 via the switching device 300 (S611), and the eNB 210 can receive the GTP packet from the received GTP packet The header is deleted and restored to the original IP packet (S615), and the restored IP packet can be delivered to the UE 100. [

On the other hand, if there is no pre-stored tunneling information corresponding to the UE 100 in step S605, since the UE 100 is out of the service zone, a packet transmitted from the external server 700 is transmitted to the UE 100 It is prevented from being transmitted.

The tunneling information management method for local breakout according to the embodiment of the present invention has been described above.

The tunneling information management method for local breakout according to an embodiment of the present invention as described above may be provided in the form of a computer readable medium suitable for storing computer program instructions and data. A program recorded on a recording medium for implementing a tunneling information management method for local breakout according to an embodiment of the present invention is connected between an access network and a core network and monitors messages transmitted and received between the access network and the core network, A service server for providing a local break-out service to an external server, the service server comprising: a message detecting step of monitoring and detecting a message transmitted and received between the access network and the core network; A zone determination step of determining whether the service zone is out of service zone, a zone determination step of determining whether the service zone is out of service zone, and tunneling information for the terminal or deleting tunneling information stored in advance in response to the determined result, Information management step, and the like.

At this time, the program recorded on the recording medium can be read and installed in the computer and executed, thereby executing the above-described functions.

In order to allow a computer to read a program recorded on a recording medium and to execute functions implemented by the program, the above-mentioned program may be stored in a computer-readable medium such as C, C ++, JAVA, machine language, and the like.

The code may include a function code related to a function or the like that defines the functions described above and may include an execution procedure related control code necessary for the processor of the computer to execute the functions described above according to a predetermined procedure. In addition, such code may further include memory reference related code as to what additional information or media needed to cause the processor of the computer to execute the aforementioned functions should be referenced at any location (address) of the internal or external memory of the computer . In addition, when a processor of a computer needs to communicate with any other computer or server that is remote to execute the above-described functions, the code may be stored in a memory of the computer using a communication module of the computer, It may further include a communication-related code such as how to communicate with another computer or a server, and what information or media should be transmitted or received during communication.

Such computer-readable media suitable for storing computer program instructions and data include, for example, magnetic media such as hard disks, floppy disks and magnetic tape, compact disk read only memory (CD-ROM) Optical media such as a DVD (Digital Video Disk), a magneto-optical medium such as a floppy disk, and a ROM (Read Only Memory), a RAM , Random Access Memory), flash memory, EPROM (Erasable Programmable ROM), and EEPROM (Electrically Erasable Programmable ROM). The processor and memory may be supplemented by, or incorporated in, special purpose logic circuits.

The computer readable recording medium may also be distributed over a networked computer system so that computer readable code can be stored and executed in a distributed manner. The functional program for implementing the present invention and the related code and code segment may be implemented by programmers in the technical field of the present invention in consideration of the system environment of the computer that reads the recording medium and executes the program, Or may be easily modified or modified by the user.

While the specification contains a number of specific implementation details, it should be understood that they are not to be construed as limitations on the scope of any invention or claim, but rather on the description of features that may be specific to a particular embodiment of a particular invention Should be understood. Certain features described herein in the context of separate embodiments may be implemented in combination in a single embodiment. Conversely, various features described in the context of a single embodiment may also be implemented in multiple embodiments, either individually or in any suitable subcombination. Further, although the features may operate in a particular combination and may be initially described as so claimed, one or more features from the claimed combination may in some cases be excluded from the combination, Or a variant of a subcombination.

Likewise, although the operations are depicted in the drawings in a particular order, it should be understood that such operations must be performed in that particular order or sequential order shown to achieve the desired result, or that all illustrated operations should be performed. In certain cases, multitasking and parallel processing may be advantageous. Also, the separation of the various system components of the above-described embodiments should not be understood as requiring such separation in all embodiments, and the described program components and systems will generally be integrated together into a single software product or packaged into multiple software products It should be understood.

The present invention relates to a local breakout system, and more particularly, to a method and apparatus for managing a tunneling information by using a message related to a terminal generated between an access network and a core network to provide a continuous local breakout service A method for managing tunneling information for local breakout, and a service server therefor.

According to the present invention, various types of messages generated in consideration of mobility of a terminal are detected, and tunneling information for providing a local breakout service is managed using the detected messages. Therefore, even in various situations depending on the movement of the terminal, It is possible to provide a service.

Accordingly, the present invention can contribute to the development of the mobile communication service industry. Moreover, the present invention has a possibility of commercialization or sales as well as a possibility of being practically and industrially applicable.

100: UE 200: Access network 210: eNB
300: switching device 400: core network 410: MME
420: S-GW 430: P-GW 450: EPC
500: Internet network 600: Service server
610: first interface unit 620: second interface unit
630: control unit 631:
632: Service zone determination unit 633: Tunneling information management unit
634: packet processing unit 640:
641: Tunneling information 642: Service zone information
642: service zone information 700: external server

Claims (12)

A service server connected between an access network and a core network and monitoring a message transmitted and received between the access network and the core network to provide a local breakout service to a connected external server,
A monitoring unit monitoring and detecting messages transmitted and received between the access network and the core network;
A service zone determination unit for determining a service zone entry, a service zone departure, and a movement within the service zone using the message detected by the monitoring unit; And
A tunneling information manager for generating tunneling information for the terminal or deleting tunneling information previously stored corresponding to the terminal according to a result of the determination by the service zone determiner;
The service server comprising: The method according to claim 1,
The service zone determination unit
Determines whether a base station to which the terminal is currently connected corresponds to a service zone using the detected message, confirms presence or absence of tunneling information stored in advance in correspondence with the terminal, and transmits the service zone entry, And determines the movement of the service server. 3. The method of claim 2,
The detected message
And an initial access message or a location report message transmitted from a base station of the access network to a mobility management apparatus of the core network. The method according to claim 1,
The service zone determination unit
Using the detected message, determines whether the source base station and the target base station correspond to the service zone, and determines whether to enter the service zone, the service zone deviation, or the movement in the service zone. The method according to claim 2 or 4,
A storage unit for storing one or more base station identification information preset in a service zone or service zone information including cell information (Cell ID) for a base station;
Further comprising:
The service zone determination unit
If the base station identification information is the base station identification information stored in the service zone information after determining the base station identification information for the base station in the detected message,
If the extracted base station identification information is not the base station identification information stored in the service zone information, checking cell information on the base station in the message, and if the cell information is cell information stored in the service zone information, Quot; zone ".< / RTI > The method according to claim 1,
If the detected message includes a HANDOVER REQUIRED message that the source base station transmits to the mobility management apparatus of the core network and a handover request message that the mobility management apparatus delivers to the target base station ,
The service zone determination unit
(RRC) information in the handover request message and the handover request message, determines a message for the same UE, and then uses the detected message to enter a service zone, a service zone Departure, and movement in the service zone. The method according to claim 1,
If the result of the determination is a service zone entry or a movement in a service zone, the tunneling information management unit determines the terminal identification information (MME UE S1AP) allocated by the mobility management apparatus in the handover request message detected through the monitoring unit ID) and uplink S1 bearer information (S1 S-GW TEID) and extracts the terminal identification information (MME UE S1AP ID) allocated by the mobility management apparatus in the path change request message or the handover request response message detected through the monitoring unit ) And the downlink S1 bearer information (S1 target eNB TEID), mapping the uplink S1 bearer information and the downlink S1 bearer information corresponding to the terminal identification information to generate the tunneling information for the terminal, The uplink S1 bearer information and the downlink S1 bearer information from the tunneling information pre- Lt; / RTI >
Wherein the tunneling information management unit deletes tunneling information previously stored corresponding to the terminal if the result of the determination by the service zone determination unit is a service zone deviation. A service server connected between an access network and a core network and monitoring messages transmitted and received between the access network and the core network and providing a local breakout service to a connected external server,
A message detection step of monitoring and detecting a message transmitted and received between the access network and the core network;
A zone determination step of determining whether the mobile station is in a service zone, a service zone departure, and a movement in a service zone using the detected message; And
A tunneling information management step of generating tunneling information for the terminal or deleting tunneling information previously stored corresponding to the terminal or changing the tunneling information according to the determined result;
Wherein the tunneling information comprises at least one tunneling information. 9. The method of claim 8,
The zone determination step
Determining whether a BS currently connected to the MS corresponds to a service zone using the detected message; And
If the base station to which the terminal is currently connected corresponds to a service zone, confirms whether tunneling information stored in advance corresponds to the terminal, determines that the tunnel exists in the service zone for the terminal if not present, It is determined that the mobile station moves within the service zone,
Determining if there is tunneling information stored in advance corresponding to the terminal if the base station to which the terminal is currently connected does not correspond to the service zone and if the terminal exists, determining that the terminal is out of service for the terminal;
Wherein the tunneling information comprises at least one tunneling information. 9. The method of claim 8,
The zone determination step
Determining whether a source base station and a target base station correspond to a service zone using the detected message; And
If the source base station only corresponds to the service zone, it is determined that the service zone is out of service for the terminal, and if both the source base station and the target base station Determining that the mobile station moves within the service zone if the mobile station is in a service zone;
Wherein the tunneling information comprises at least one tunneling information. 9. The method of claim 8,
In the message detection step,
If the detected message is a handover required message transmitted by the source base station to the mobility management apparatus of the core network and a handover request message transmitted by the mobility management apparatus to the target base station,
Prior to the zone determination step,
A UE confirmation step of determining a message for the same UE using RRC information in the handover request message and the handover request message;
Wherein the tunneling information management method further comprises: A computer-readable recording medium recording a program for executing the tunneling information management method for local breakout according to any one of claims 8 to 11.

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