KR102107093B1 - Method for processing packet of local domain, apparatus for the same - Google Patents

Abstract

The present invention relates to a packet processing method for providing a local domain, an apparatus therefor, and a packet processing method for providing a local domain capable of more effectively processing a domain query message of a terminal using a local service, and an apparatus for the same .
To this end, the local domain processing apparatus according to an embodiment of the present invention is a monitoring module that receives a domain query message for a server's IP address information from a terminal, searches for IP address information of the server, and when a search result exists, After converting the response message into a second format packet by using a domain management module for generating a response message that is a first format packet including the IP address information of the server and tunneling information for the terminal, the converted response message It may be configured to include a packet processing module for transmitting to the terminal.

Description

Packet processing method for providing local domain, device therefor {METHOD FOR PROCESSING PACKET OF LOCAL DOMAIN, APPARATUS FOR THE SAME}

The present invention relates to a packet processing method for providing a local domain, an apparatus therefor, and a packet processing method for providing a local domain capable of more effectively processing a domain query message of a terminal using a local service, and an apparatus for the same .

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

In general, mobile communication systems have been developed to provide voice services while ensuring user activity. However, the mobile communication system has gradually expanded not only to voice, but also to data services, and has developed to the extent that it can provide high-speed data services. However, in the mobile communication system in which the service is currently provided, a shortage of resources and users require a higher-speed service, so a more advanced mobile communication system is required.

In response to these demands, LTE (Long Term Evolution), a next-generation mobile communication system, is emerging. LTE is a technology that implements high-speed packet-based communication with a transmission speed of up to 100 Mbps, and mobile data traffic using the LTE network is delivered to the Internet network through the Evolved Packet Core (EPC), an LTE core network.

Meanwhile, recently, data traffic has exploded due to the appearance of various types of mobile devices such as smartphones and tablet PCs. Since mobile data traffic using the LTE network is necessarily delivered through EPC, an increase in mobile data traffic causes traffic overload of the core network. In addition, in general, when data is to be transmitted through the core network, there is a problem that the user has to pay a relatively large data usage fee.

Accordingly, local break out techniques for offloading traffic concentrated in the core network in various ways have been proposed.

However, the local breakout techniques so far are simply for traffic distribution concentrated in the core network, and there is a problem that a local domain providing method using the same is not considered.

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

The present invention has been proposed to solve the above-described conventional problems, a packet processing method for providing a local domain, which can provide a response message for a domain query message transmitted from a terminal on behalf of a local domain processing device, for this The purpose is to provide a device.

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

Local domain processing apparatus according to an embodiment of the present invention for achieving the above object is a monitoring module for receiving a domain query message for the IP address information of the server from the terminal; A domain management module that searches IP address information of the server and generates a response message that is a first format packet including the IP address information of the server when a search result exists; And a packet processing module that converts the response message into a second format packet using tunneling information for the terminal, and then transmits the converted response message to the terminal.

In this case, the first type packet may be a Transmission Control Protocol / Internet Protocol (TCP / IP) packet, and the second type packet may be a General Packet Radio Service Tunneling Protocol (GTP) packet.

In addition, the domain query message is a second format packet in which a second format header is added to a first format packet, and the packet processing module converts the domain query message, which is the second format packet, into a first format packet and converts the domain. Can be delivered to the management module.

Further, the tunneling information may include at least one of a stream control transmission protocol, a UE context, and bearer (E-RAB) information.

Further, the packet processing module extracts a base station TEID (Tunnel Endpoint IDentifier), a base station IP, and a serving gateway TEID (Tunnel Endpoint IDentifier) for packet transmission among tunneling information stored in response to the UE to generate a second format header. You can.

In addition, the monitoring module may further include a tunneling management module that generates tunneling information for the terminal using an S1 signaling message between the base station of the access network and the mobility management device of the core network.

In this case, among the S1 signaling messages transmitted and received between the base station of the access network and the mobility management device of the core network, an initial context setup request message transmitted from the mobility management device to the base station, and the initial context setup request message In response, an initial context setup response message, which is a message transmitted from the base station to the mobility management device, a handover request message transmitted from the mobility management device to the base station, and the handover request In response to a message, a handover request acknowledgment message, which is a message transmitted from the base station to the mobility management device, a path switch request message transmitted from the base station to the mobility management device, and the routeWhen at least one of a path switch request acknowledgment message, which is a message transmitted from the mobility management apparatus to the base station, is detected in response to a change request message, tunneling information for the terminal is extracted and extracted. Tunneling information may be stored corresponding to the terminal.

In addition, the tunneling management module is a radio access bearer setup request (E-RAB Setup Request) message transmitted from the mobility management device to the base station among S1 signaling messages transmitted and received between the base station of the access network and the mobility management device of the core network, or When an E-RAB Setup Response message, which is a message transmitted from the base station to the mobility management device in response to the radio access bearer setup request message, is detected, tunneling information pre-stored corresponding to the terminal Add bearer information to the bearer information by using the radio access bearer setup request message or radio access bearer setup response message, and release the radio access bearer command from the mobility management device to the base station (E-RAB Release Command) ) At the message or base station When an E-RAB Release Indication message transmitted to the mobility management device is detected, bearer information may be deleted among tunneling information for the terminal.

Further, the tunneling management module is a UE context release command message transmitted from the mobility management device to the base station among S1 signaling messages transmitted and received between the base station of the access network and the mobility management device of the core network, the base station When at least one of the handover failure message (Handover Failure) message transmitted from the, from the mobility management apparatus to the base station or from the base station to the mobility management apparatus is detected, Tunneling information for a terminal may be deleted.

A packet processing method for providing a local domain according to an embodiment of the present invention for achieving the above object includes receiving a domain query message for IP address information of a server from a terminal; Searching for IP address information of the server; Generating a response message that is a first format packet including the IP address information of the server when the IP address information of the server exists as a result of the search; Converting the response message into a second format packet using tunneling information for the terminal; And transmitting a response message converted to the second format packet to the terminal.

In this case, the domain query message is a second format packet in which a second format header is added to a first format packet, and after receiving the domain query message, the second format packet is the second format packet in the domain query message. And converting the header into a first format packet with the header removed.

In addition, after the step of retrieving the IP address information of the server, if the IP address information of the server does not exist as a result of the search, a second format header is added to the domain query message converted into the first format packet again. Re-converting to a second format packet; And controlling the converted second type packet response message to be delivered to the core network.

In addition, extracting the S1 signaling message transmitted and received between the base station of the access network and the mobility management device of the core network; And extracting and storing tunneling information for the terminal using the extracted message.

According to a packet processing method for providing a local domain according to the present invention, an apparatus therefor, a service server located between an access network and a core network accessed by a terminal receives a domain query message transmitted from the terminal, and receives a response message to the terminal. By transmitting to, it is possible to provide a more effective local domain.

In addition, the present invention has an effect that more efficient packet processing is possible when providing a response message for a domain query message without any change in design of the access network or the core network, while the service server has previously established and managed tunneling information for each terminal. .

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

1 is a diagram illustrating a network structure to which a packet processing method for providing a local domain according to an embodiment of the present invention is applied.
2 is an exemplary diagram for describing a local breakout method according to an embodiment of the present invention.
3 is a block diagram showing the main configuration of a service server according to an embodiment of the present invention.
4 is a block diagram for explaining in more detail the configuration of a control unit of a service server according to an embodiment of the present invention.
5 is a flowchart illustrating a process of generating tunneling information for each terminal according to an embodiment of the present invention.
6 is an exemplary diagram of tunneling information generated based on a signaling message according to an embodiment of the present invention.
7 and 8 are data flow diagrams illustrating a packet processing method for providing a local domain according to an embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings will be described in detail preferred embodiments that can be easily carried out by the person of ordinary skill in the art. However, in the detailed description of the operating principle for the preferred embodiment of the present invention, if it is determined that a detailed description of related known functions or configurations may unnecessarily obscure the subject matter of the present invention, the detailed description will be omitted. This is to more clearly communicate the core of the present invention by omitting unnecessary description. In addition, the present invention can be applied to various changes and can have various embodiments, and specific embodiments are illustrated in the drawings and described in detail in the detailed description, but this is not intended to limit the present invention to specific embodiments. It should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention.

In addition, terms including ordinal numbers such as first and second are used to describe various components, and are used only to distinguish one component from other components, and to limit the components It is not used. For example, the second component may be referred to as a first component without departing from the scope of the present invention, and similarly, the first component may also be referred to as a second component.

In addition, when referring to a component being "connected" or "connected" to another component, it means that it can be connected or connected logically or physically. In other words, it may be understood that a component may be directly connected to or connected to other components, but other components may exist in the middle and may be connected or connected indirectly.

In addition, the terms used herein are only used to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In addition, terms such as "comprises" or "have" described herein are intended to designate the existence of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, or one or more thereof. It should be understood that the above or other features or numbers, steps, operations, components, parts or combinations thereof are not excluded in advance.

Now, a packet processing method for providing a local domain according to an embodiment of the present invention and an apparatus therefor will be described in detail with reference to the drawings. At this time, the same reference numerals are used for parts having similar functions and actions throughout the drawings, and duplicate descriptions thereof will be omitted.

First, a network structure to which a packet processing method for providing a local domain according to an embodiment of the present invention is applied will be described.

1 is a diagram illustrating a network structure to which a packet processing method for providing a local domain according to an embodiment of the present invention is applied.

In Fig. 1, the network of the present invention may be implemented to allow a user to use a communication service while moving. For example, it may be a commercially available LTE (Long Term Evolution) network, and may include other equivalent networks or combinations of various types of networks.

In this network structure, the service server 600 supporting the packet processing method for providing a local domain according to an embodiment of the present invention is located between the access network 200 and the core network 400, and the UE 100 Instead of a domain server connected to the Internet network 500, a domain query message is provided to the UE 100.

When explaining in more detail about each component in the network structure to which the packet processing method for providing a local domain according to an embodiment of the present invention is applied, first, the UE 100 refers to a user equipment , Through the access network 200 and the core network 400 to access the Internet network 500, and through the Internet network 500, a server that provides a specific service, for example, a domain server and can transmit and receive information. At this time, the UE 100 is connected to the Internet network 500 through the eNB 210, the switching device 300, the S-GW 420, and the P-GW 430 of the access network 200. For this, the UE 100 of the present invention may include a browser for transmitting and receiving information, a memory for storing programs and protocols, a microprocessor for executing and controlling various programs, and the like.

In addition, the UE 100 described in the present specification includes a terminal, a mobile station (MS), a mobile terminal (MT), a subscriber station (SS), and a portable subscriber station (Portable Subscriber Station). , PSS), an access terminal (AT), or the like, or may include all or part of functions such as a mobile terminal, a subscriber station, and a mobile subscriber station. Further, the UE 100 may be classified into a smart phone, a tablet PC, a PDA (Personal Digital Assistants), and a portable multimedia player (PMP) according to the implementation form.

The access network 200 supports access to the core network 400 of the UE 100, and may include a plurality of eNBs (eNodeBs, 210). Here, the plurality of eNBs 210 may be a concept including a base station and a base station controller supporting access of the UE 100. In addition, the eNB 210 may be replaced by a base station controller such as a base station (BS), a base transceiver station (BTS), a NodeB, a base station controller (BSC), or a radio network controller (RNC). In another method, the digital signal processing unit and the radio signal processing unit, which are integrally implemented in the base station, are divided into digital units (DUs) and radio units (RUs), respectively, and each of a plurality of areas. RU is installed, and multiple RUs are connected to centralized DUs.

The core network 400 manages user information subscribed to a communication service provided by the network, and performs circuit switching or packet switching. In addition, it performs main functions for mobile communication services such as call processing, mobility control and switching between access networks 200, and manages and controls interworking with external networks, such as the Internet network 500. The core network 400 may be composed of a plurality of entities performing the above-described functions. For example, the core network 400 includes a mobility management entity (MME) 410, a serving gateway (S-GW) 420, and a packet data network gateway (P-GW) 430 shown in the drawings. Mobile Switching Center (MSB), Home Location Register (HLR), Home Subscriber Server (HSS), and the like, may be further included.

Among them, the MME 410, S-GW 420, and P-GW 430, which are main components constituting the core network 400 shown in the drawings, will be briefly described.

First, the MME 410 means a mobility management device that manages the mobility of the UE 100, NAS (Non-Access Signaling), NAS signaling security (Signaling Security), mobility management of the UE 100, idle mode It performs functions such as location related to a terminal (Idle mode UE), roaming related, authentication, and bearer management. In addition, when the user wants to use the data service by using the UE 100, the UE 100 may perform a role of paging.

The S-GW 420 refers to a serving gateway that processes traffic for multiple eNBs 210. In addition, it works in conjunction with the P-GW 430, supports data transmission and reception with the UE 100, and can perform an anchoring role when handover occurs.

The P-GW 430 means a packet data network gateway that processes traffic between the core network 400 to which it belongs and a network other than the core network 400 to which it belongs, such as the Internet network 500. The P-GW 430 may include service policy enforcement, per-user based packet filtering, charging support, lawful interception, and user terminal IP allocation (UE IP). allocation) and packet screening. In addition, different QoS policies are performed for each UE 100, and a role of controlling traffic is performed.

The above-described MME 410, S-GW 420, and P-GW 430 may be referred to as Evolved Packet Core (EPC) as main entities of the core network 400.

In addition, the MME 410 may transmit and receive a message through S1 signaling. At this time, the S-GW 420 may be connected through an S1-U interface, and the P-GW 430 may be connected through an S5 interface.

The Internet network 500 is a general public communication network in which information is exchanged according to the TCP / IP protocol, and may be established through one or more of wired, wireless, and optical communication technologies, and instant message service, Internet portal service, and social network service. , Various services such as e-commerce services may be provided based on the Internet network 500. In particular, a content providing device (not shown) of a content provider (CP) that holds a plurality of content and serves the content to a user may be connected to the Internet network 500.

In addition, in a network to which a packet processing method for providing a local domain according to an embodiment of the present invention is applied, a switching device 300 may be located between the access network 200 and the core network 400.

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 may deliver only the designated packet to the service server 600 under the control of the service server 600.

For example, when the packet transmitted from the UE 100 to the core network 400 is a packet that can be processed by the external server 700, the switching device 300 blocks access to the core network 400 of the packet, The packet can be delivered to the service server 600. In addition, the switching device 300 checks the eNB 210 of the access network 200 of the packet transmitted from the UE 100 to the core network 400, and if it is the designated eNB 210, the core network 400 of the corresponding packet ) Block access, and deliver the packet to the service server 600.

This will be described in more detail with reference to FIG. 2.

2 is an exemplary diagram for describing a local breakout method according to an embodiment of the present invention.

First, referring to FIG. 2A, the switching device 300 receives and stores control information for selective traffic transmission from the service server 600 in advance, and the UE 100 as shown in the direction indicated by ① When a packet to be transmitted to the core network 400 is received, the packet can be processed by the external server 700 by checking the corresponding packet. For example, by checking the port number of the TCP header, the port number that can be processed by the external server 700 ( For example, 80 port), the access to the core network 400 of the packet is blocked, and the packet is delivered to the service server 600 as indicated in the direction indicated by ②.

Packets transmitted from the switching device 300 are processed by the service server 600 and can be delivered to the external server 700, and the service server 600 is transmitted by the external server 700 to the UE 100. The packet may be processed as if it is a packet provided by the core network 400, and then transmitted to the UE 100 through the switching device 300 again.

On the other hand, when the control information for the selective traffic transmission provided by the service server 600 is the information on the designated access network 200, the switching device 300 selects the designated access network 200 among the plurality of connected access networks 200. It is also possible to selectively transmit only the packets transmitted through the service server 600. That is, as shown in Figure 2b, the switching device 300 may be located between the plurality of access networks (200a, 200b) and the core network 400, and service only packets transmitted through the second access network (200b) In the state in which control information is stored in advance to be delivered to the server 600, the packet transmitted by the UE 100 through the first access network 200a to the core network 400 is processed in a different manner, as indicated by direction ①. Without passing through to the core network 400, only the packets delivered to the core network 400 via the designated second access network 200b can be selectively delivered to the service server 600 as in the direction indicated by ②. .

Further, the switching device 300 monitors messages transmitted and received between the access network 200 and the core network 400 under the control of the service server 600, extracts only S1 signaling messages, and extracts the extracted messages from the service server ( 600).

In addition, in the exemplary embodiment of the present invention, the switching device 300 will be mainly described as a configuration in which only selective packets are transmitted to the service server 600 under the control of the service server 600, but the present invention is not limited thereto. The switching device 300 monitors all uplink (UPLINK) or downlink (DOWNLINK) packets transmitted and received between the access network 200 and the core network 400 to deliver all packets to the service server 600, and the service server The packet transmitted from the 600 may serve to deliver the packet to the UE 100, and only the GTP packet among packets transmitted and received between the access network 200 and the core network 400 may be delivered to the service server 600. .

Referring to FIG. 1 again, a service server 600 supporting a packet processing method for local breakout according to an embodiment of the present invention will be described.

The service server 600 according to an embodiment of the present invention is located between the switching device 300 and the external server 700. The service server 600 may first generate a control command for selective traffic processing and transmit it to the switching device 300. Then, when the selected packet is received from the switching device 300, a processing process is performed to deliver the packet to the external server 700.

That is, when the second format packet with the second format header added to the first format packet transmitted by the UE 100 is received from the switching device 300, the service server 600 receives the second format packet from the first format packet. The restored first packet is delivered to the external server 700 by restoring the packet.

In addition, when a first format packet transmitted from the external server 700 to the UE 100 is received, a second format header is generated using pre-stored tunneling information corresponding to the UE 100, and the first format After converting the second format packet to which the second format header is added to the packet, the converted second format packet is transmitted 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 means a GTP header. .

In addition, the service server 600 according to an embodiment of the present invention includes a local domain processing function. In other words, when the domain query message for the address of a specific external server delivered from the UE 100 is transmitted through the switching device 300, the service server 600 searches for and retrieves the address information of the corresponding external server 700 When the result is present, a response message including address information of the external server 700 is generated. At this time, in order to deliver the generated response message to the UE 100 through the access network 200, the service server 600 generates a second type header using tunneling information stored in correspondence with the UE 100, and generates The second format header is added to the response message, which is a first format packet, to convert the response message into a second format packet, and serves to process the converted response message to be provided to the UE 100. .

A packet processing method for providing a local domain in a more specific service server 600 will be described later.

The external server 700 refers to an enterprise network server previously subscribed to a communication service provided by the service server 600 according to an embodiment of the present invention. It is located in a specific region or is specialized for an intranet service to the UE 100 It serves to provide services. Multiple external servers 700 may exist.

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

3 is a block diagram showing a main configuration of a service server according to an embodiment of the present invention, and FIG. 4 is a block diagram for explaining in more detail the configuration of a control unit of a service server according to an embodiment of the present invention.

1 and 3, the 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).

When describing each component in more detail, first, the first interface unit 610 is connected between the access network 200 and the core network 400. More precisely, as shown in FIG. 1, the first interface unit 610 may be connected between the access network 200 and the core network 400 through the switching device 300.

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 is loaded with at least one processor and at least one memory loading data including a central processing unit (CPU) / micro processing unit (MPU) in hardware. The execution memory (eg, a register and / or random access memory (RAM)) and a bus (BUS) for inputting and outputting at least one or more data to the processor and memory. Also, in order to perform a function defined in the service server 600 in software (for example, a packet processing function for providing a local domain), a predetermined program is loaded into the execution memory from a predetermined recording medium and processed by the processor. It may include routines or program data. In other words, to process a packet processing method for providing a local domain according to an embodiment of the present invention, a software-processable component among functions provided in the service server 600 is determined as a function of the control unit 630. You can.

The control unit 630 of the present invention is functionally connected to at least one or more components provided to support a packet processing method for providing a local domain according to an 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 provides a signal flow for supplying power to each component and performing functions. Control.

The control unit 630 according to an embodiment of the present invention includes a monitoring module 631, a packet processing module 632, a tunneling management module 633, and a domain management module 634, as shown in FIG. Can be configured.

First, the monitoring module 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 packet processing module 632, or tunnels. It may serve to deliver to the management module 633. For example, the monitoring module 631 transmits the S1 signaling message among the packets transmitted through the first interface unit 610 to the tunneling management module 633, and queries the domain for the address of a specific external server among the delivered packets The message may be delivered to the domain management mode 634, and the remaining packets may be delivered to the packet processing module 632.

In addition, the monitoring module 631 may also serve to deliver packets processed through the packet processing module 632 to the first interface unit 610.

The packet processing module 632 serves to process packets transmitted from the monitoring module 631 to be recognized by the external server 700.

To explain this in more detail, first, a general packet transmission method will be described first.

In general, a packet transmitted by the UE 100 or a packet destined for the UE 100 on the access network 200 and the core network 400 may be tunneled and transmitted unlike the Internet network 500.

In the following description, a GTP tunneling method is described as an example for convenience of description, but is not limited to the tunneling method, and various tunneling techniques such as IPinIP tunneling (In-in-IP encapsulation) and GRE tunneling (Generic Routing Encapsulation) It may be applied to.

Taking the GTP tunneling method as an example, when the UE 100 wants to transmit a packet to the core network 400, the source address information (= address information of the UE 100) and destination address information (eg, 111.111.111.111) ) Is transmitted to the access network 200 including an IP packet.

The IP packet structure at this time is as follows.

Packet sent by UE IP header: SIP = UE, DIP = 111.111.111.111 IP Payload

Here, the source IP (SIP) means the source address information (= address information of the UE 100), and the destination IP (DIP) means the destination address information.

The eNB 210 of the access network 200, which received this, converts the IP packet into a GTP packet by adding a GTP header for GTP tunneling to a packet transmitted from the UE 100 in order to tunnel and deliver the IP packet according to the tunneling mode. It is delivered to the S-GW 420 of the core network 400.

Accordingly, the GTP packet may include the following structure.

Header added by eNB (GTP header) Packet sent by UE Outer IP header: SIP = eNB, DIP = S-GW UDP header GTP header: TEID = X IP header: SIP = UE, DIP = 111.111.111.111 IP Payload

The S-GW 420 receiving the GTP packet from the eNB 210 retransmits and transmits the Outer IP header and GTP header. Accordingly, the GTP packet may include the following structure.

Header added by S-GW (GTP header) Packet sent by UE Outer IP header: SIP = S-GW, DIP = P-GW UDP header GTP header: TEID = Y IP header: SIP = UE, DIP = 111.111.111.111 IP Payload

Thereafter, the P-GW 430 removes the GTP header, converts it into an original IP packet transmitted by the UE 100, and then provides a content providing device corresponding to the destination address via the Internet network 500 (not shown) ) To send the packet.

Conversely, even when a packet is transmitted from the Internet network 500 to the UE 100, the GTP header is further added from the core network 400 that receives the IP packet destined for the UE 100 from the Internet network 500. After converting it into one GTP packet, it is transmitted to the eNB 210 of the access network 200, and the eNB 210 of the access network 200 receiving it removes the GTP header for GTP tunneling from the received GTP packet, and the original After converting to an IP packet, it is delivered to the UE 100 through a wireless section.

In an embodiment of the present invention, the service server 600 located between the above-described access network 200 and the core network 400 interlocks with the switching device 300 to deliver the designated packet to the external server 700, and the external server (700) delivers the packet transmitted to the UE (100), and performs a packet processing method to support this process.

Hereinafter, a method of processing an upstream-oriented packet will be described first.

The IP packet transmitted by the UE 100 to the core network 400 is converted into a GTP packet through the eNB 210 of the access network 200 as described above. The GTP packet is passed through the switching device 300, the switching device 300 according to the control information provided by the service server 600, if the corresponding GTP packet is a designated packet, the GTP to the core network 400 The packet is blocked from being transmitted, and the GTP packet is delivered to the service server 600.

The monitoring module 631 of the control unit 630 of the received service server 600 transmits the GTP packet to the uplink processing module 632a of the packet processing module 632.

The uplink processing module 632a performs a process of deleting the GTP header from the transmitted GTP packet and converting it into an IP packet in order to deliver the transmitted GTP packet to the external server 700. Then, the converted IP packet is delivered to the external server 700 corresponding to the destination address.

Hereinafter, a packet processing method centered on a downlink will be described.

The service server 600 receives packets transmitted from the external server 700 to the UE 100. The external server 700 delivers the packet to the UE 100 in the form of an IP packet. The downlink processing module 632b of the service server 600 control unit 630 receiving this performs a process of converting the corresponding IP packet into a GTP packet to deliver it to the eNB 210 of the access network 200. That is, the downlink processing module 632b checks the destination address of the IP packet transmitted from the external server 700 to check the corresponding UE 100, and then pre-stored the storage unit 640 corresponding to the UE 100 GTP header is generated using tunneling information. Then, after adding a GTP header to the IP packet and converting it into a GTP packet, the converted GTP packet is delivered to the monitoring module 631, and the monitoring module 631 is delivered to the first interface unit 610 to access the network ( 200).

On the other hand, if the packet transmitted from the switching device 300 is a domain query message for the address of the specific external server 700, the monitoring module 631 sends it to the uplink processing module 632a of the packet processing module 632. To deliver. The received uplink processing module 632a converts the domain query message, which is a GTP packet with a GTP header added to an IP packet, into an IP packet, and then transmits it to the domain management module 634.

The domain management module 634 checks the contents of the IP packet to check the domain name of the external server to be queried, and searches for address information corresponding to the domain name. If the search result exists, the domain management module 634 sends a response message to the downlink processing module 632b of the packet processing module 632.

The downlink processing module 632b, which receives this, transmits the response message to the UE 100 via the eNB 210 of the access network 200, using tunneling information pre-stored in response to the UE 100. After generating the GTP header, the generated GTP header is added to the response message in the form of an IP packet to convert the response message into a GTP packet, and then the converted GTP packet is sent to the UE 100 via the monitoring module 631. Can deliver.

In order to perform this process, the tunneling management module 633 generates tunneling information for each UE 100 in advance and controls the process stored in the storage unit 640.

To this end, the monitoring module 631 monitors and extracts the S1 signaling message between the eNB 210 of the access network 200 and the MME 410 of the core network 400, and delivers the extracted message to the tunneling management module 633 do.

The tunneling management module 633 uses at least one of Stream Control Transmission Protocol, UE Context, and Bearer (E-RAB) information, which are information necessary for generating a GTP header using the transmitted and received S1 signaling messages. Either can be extracted.

Here, the stream control transport protocol includes at least one of a mobility management device IP, a mobility management device port, a base station IP, and a base station port, and the terminal context is one of the mobility management device S1AP ID and the base station S1AP ID. It includes at least one, 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.

The process of generating tunneling information for each UE 100 will be described in more detail with reference to FIG. 5, and the tunneling information 641 for each UE 100 generated by the tunneling management module 633 is a storage unit ( 640) and can be managed. Also, the storage unit 640 may store and manage address information of an external server corresponding to the domain name. The storage unit 640 may include a flash memory, a hard disk, a multimedia card micro type memory (for example, SD or XD memory, etc.), RAM, RAM, and ROM ( ROM) and the like.

As described above, main components of the service server 600 have been described with reference to FIGS. 3 and 4. However, the components shown through FIGS. 3 and 4 are not all essential components, and the service server 600 may be implemented by more components than the components illustrated, and service may be provided by fewer components. Server 600 may be implemented. Also, the service server 600 may be implemented in the form of a set of servers supporting various functions.

In addition, of course, the positions of the components of the service server 600 illustrated through FIGS. 3 and 4 may be changed for convenience or other reasons.

In addition, among the main functions of the service server 600 according to an embodiment of the present invention, a function of generating a response message for a domain query message for an address of an external server and performing packet processing to provide it is a local domain processing device It may be implemented as. At this time, the local domain processing device may be configured to include a monitoring module, a domain management module, and a packet processing module that perform the above-described functions, and the local domain processing device 600 is one module of the service server 600. It may exist in the form, or may exist in the form of an independent server that can interwork with the service server 600.

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

In addition, the service server 600 according to an embodiment of the present invention has the same configuration as a conventional web server or a network server in hardware. However, software includes program modules implemented through languages such as C, C ++, Java, Visual Basic, and Visual C. The service server 600 may be implemented in the form of a web server or a network server, and 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 client or other web server. It means a computer system (web server program) installed therefor and a computer system that accepts a request to perform the work and derives and provides the work result. 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 a web server and, in some cases, various databases built therein. The service server 600 uses a web server program provided in various ways according to operating systems such as DOS, Windows, Linux, UNIX, and Macintosh in general server hardware. As a representative example, a website (Website), an Internet Information Server (IIS) used in a Windows environment, and a CERN, NCSA, APPACH used in a Unix environment may be used. In addition, the service server 600 may classify service subscription information, store and manage it in a member database, and such a database may be implemented inside or outside the service server 600.

Meanwhile, a memory mounted in 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 implementations, the memory may be a non-volatile memory unit. In one embodiment, 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 some 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. As an example, '~ module' refers to components such as software components, object-oriented software components, class components and task components, and processes, functions, attributes, procedures, and subs. Routines, segments of program code, drivers, data, database, 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 specification and drawings describe exemplary device configurations, the functional operations and subject implementations described herein may be implemented with other types of digital electronic circuits, or the structures disclosed herein and their structural equivalents. It may be implemented in the included computer software, firmware or hardware, or a combination of one or more of them. Implementations of the subject matter described herein are one or more computer program products, that is, one for computer program instructions encoded on a tangible program storage medium to control or thereby execute the operation of a device according to the present invention. It can be implemented as the above modules. The computer-readable medium can be a machine-readable storage device, a machine-readable storage substrate, a memory device, a composition of materials affecting a machine-readable propagated signal, or a combination of one or more of these.

Hereinafter, a packet processing method for providing a local domain according to an embodiment of the present invention will be described with reference to FIGS. 5 to 9.

Before describing with reference to FIGS. 5 to 8, it should be noted that the UE referred to in the present invention refers to a user's terminal and may be replaced with other names performing equivalent or similar functions other than the UE. . In addition, the eNB means a base station, and may be replaced with other names performing equivalent or similar functions other than the eNB.

In addition, MME means a mobility management device, and may be replaced with other names performing equivalent or similar functions other than MME. In addition, it should be noted that P-GW means packet data network gateway, S-GW means serving gateway, and may be replaced with other names performing equivalent or similar functions other than P-GW and S-GW, respectively. do.

Further, 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 as an example. For example, it is not limited thereto.

For a packet processing method for providing a local domain according to an embodiment of the present invention, the service server 600 must have established tunneling information for each UE 100 in advance.

This will be described with reference to FIG. 5.

5 is a flowchart illustrating a process of generating tunneling information for each terminal according to an embodiment of the present invention.

Referring to FIGS. 1 and 5, the service server 600 works with the switching device 300 to transmit and receive S1 signaling messages transmitted and received between the eNB 210 of the access network 200 and the MME 410 of the core network 400. Extract (S101). More precisely, the switching device 300 extracts an S1 signaling message from packets transmitted and received between the eNB 210 of the access network 200 and the MME 410 of the core network 400, and transmits the S1 signaling message to the service server 600, Based on this, the service server 600 may generate and store tunneling information for each UE 100 (S103).

In more detail, the control signal between the eNB 210 and the MME 410 is transmitted through an S1AP (S1 Application Protocol) message in the S1-MME interface. The S1AP message is transmitted through the S1 signaling connection for each user, and the S1 signaling connection is a pair of eNB 210 and MME 410 allocated to identify the UE 100 (eNB UE S1AP ID, MME UE S1AP ID) (pair).

Here, when the S1 signaling connection is not established, when the registration request (Attach Request) message that is the first NAS message of the eNB 210 is transmitted, the eNB 210 allocates the eNB UE S1AP ID to establish the S1 signaling connection Then, the registration request message is transmitted to the MME 410 through an initial UE message.

When the MME 410 receives the initial UE message from the eNB 210 through the S1-MME, the S1 signaling connection between the eNB 210 and the MME 410 is established by assigning the MME S1AP UE ID to the UE 100. Is set. That is, the pair of eNB UE S1AP ID and MME UE S1AP ID described above is defined. The MME UE S1AP ID may be used by the MME 410 to identify the UE 100 in the S1-MME interface in the future.

In addition, the MME 410 may perform S1 bearer setup in order to perform a process of allocating network / wireless resources so that a user can provide a quality of service subscribed to. That is, the MME 410 is the IP address of the UE 100 allocated by the P-GW 430 and the GUTI, TAI list allocated by the MME 410, in response to the registration request message transmitted from the UE 100, EPS Bearer ID, UE-AMBR value, QoS parameters received from S-GW are transmitted to the UE 100 through an Attach Accept message. In the S1 signaling connection between the MME 410 and the eNB 210, it may be transmitted through an initial context setup request message.

Here, the initial context setup request message may be composed of UE-AMBR (UL / DL), E-RAB ID, E-RAB QoS, S1 S-GW TEID, K _eNB , UE Security Algorithm, NAS-PDU, Among the UE-AMBR (UL / DL) means QoS parameters controlled only by the eNB 210, and the E-RAB ID is a value assigned by the MME 410, and the eNB 210 uses it as an EPS bearer ID. . In addition, E-RAB QoS means that the MME 410 is configured based on the EPS bearer QoS received from the P-GW, and S1 S-GW TEID means the uplink S1 TEID value received from the S-GW, K _eNB means the value calculated by MME 410 from K _ASME to derive AS Security Key, and UE Security Algorithm is the value received through Attach Request message from UE 100 and K _eNB together with eNB 210 Allows AS Security Setup to be performed, and the NAS-PDU means a NAS message.

Upon completion of this process, the eNB 210 can know the S1 S-GW TEID value and is in a state capable of transmitting uplink traffic to the S-GW 420.

Subsequently, the eNB 210 receiving the initial context setting request message from the MME 410 and requesting the E-RAB generation generates the DRB while passing the registration approval message to the UE 100, and for the initial context setting request message. The S1 bearer setup is completed by transmitting the downlink S1 TEID as the response message to the MME 410 through the Initial Context Setup Response message so that the MME 410 delivers the S-GW 42.

The service server 600, as described above, among the S1AP messages transmitted and received through S1 signaling between the eNB 210 of the access network 200 and the MME 410 of the core network 400, an initial context setting request message or a response thereto It is possible to extract the initial context setting response message and use it to extract the S-GW TEID value. Then, the service server 600 stores and manages the extracted S-GW TEID value for each UE 100. At this time, the service server 600 can generate and manage tunneling information of the corresponding UE 100.

In addition, the service server 600 generates tunneling information using a handover request and a handover request acknowledgment message among S1AP messages transmitted and received between the eNB 210 and the MME 410. You may.

More specifically, the UE 100 generally performs a handover process in which the eNB 210 of the access network 200 connected to the UE 100 changes according to movement.

According to the handover of the UE 100, the S1 handover procedure is also performed in the eNB 210 and the MME 410 accessed by the UE 100. Depending on the handover procedure, the eNB 210 and the MME 410 have a handover required message, a handover request message, a handover request acknowledgment message, and a handover command. Command) message, eNB Status Transfer message, MME Status Transfer message, Handover Notify message, and the like are transmitted and received.

The service server 600 may detect a handover request message or a handover request confirmation message among S1AP messages transmitted and received according to such a handover procedure, and extract tunneling information from the message.

In other words, in the handover preparation step during the handover procedure, the MME 410 requests a handover on behalf of the source eNB by sending a handover request message to the target eNB. The handover request message at this time is UE-AMBR, E-RAB to be setup (E-RAB ID, QCI, ARP, S1 S-GW TEID), Source to Target Transparent Container, UE Security Capability, Security Context). Here, S1 S-GW TEID is a GTP TEID that the target eNB can send uplink traffic to in the S-GW direction, and means a value used by the source eNB. Upon receiving this, the target eNB generates an S1 bearer, which is a unidirectional tunnel in the S-GW direction.

And, to provide seamless service to the UE 100 to be handed over to the target eNB soon, new S1 bearer resource allocation, resource allocation for tunneling with the MME 410, radio section resource allocation to be used by the UE 100, etc. When the preparation process for handover is performed and the preparation process for handover is completed, the target eNB transmits information on resources prepared for handover to the MME 410 through a handover request confirmation message. At this time, the handover request confirmation message includes E-RAB Admitted (E-RAB ID, S1 Target eNB TEID, DL S1 Target eNB TEID), Handover Command (Target C-RNTI, Target DRB ID, AS Security Algorithm of Target eNB). It can contain. Here, the S1 Target eNB TEID is generated by the target eNB, and the S-GW receiving the same can generate a unidirectional S1 bearer tunnel to the target ENB.

The service server 600 may extract information such as S-GW TEID and eNB TEID through these messages, and generate and manage tunneling information for each UE 100. At this time, the service server 600 may manage the state of the corresponding UE 100 as a generated state.

In addition, the service server 600 uses GTP using a path change request (Path Switch Request) message and a path change request confirmation (Path Switch Request Acknowledge) message among S1AP messages transmitted and received between the eNB 210 and the MME 410. Tunneling information may be generated.

In other words, the UE 100 may perform a handover procedure from the source eNB to the target eNB according to the S1 handover method between the eNB 210 and the MME 410 as described above, but the same as the MME 410. It is also possible to perform a handover procedure in an X2 handover method between base stations without much interworking with entities in the core network 400.

At this time, the target eNB transmits a path change request message to notify the MME 410 when the UE 100 is connected and change the bearer path.

The MME 410 receiving this knows that the serving cell of the UE 100 has changed, requests to change the S1 bearer path to the S-GW 420, and the S-GW 420 downlinks the S1 bearer to the target eNB. The data transmission path, such as setting (S1 Target eNB TEID), is modified. Thereafter, when a bearer modification response message is received from the S-GW 420, the MME 410 transmits a path change request confirmation message to transmit a packet to the UE 100 to the target eNB.

The service server 600 may extract information such as S-GW TEID and eNB TEID through these messages, and generate and manage tunneling information for each UE 100. At this time, the service server 600 may manage the state of the corresponding UE 100 as a generated state.

In addition, the service server 600 may extract a message for changing the bayer among S1AP messages transmitted and received to and from the eNB 210 and the MME 410 and use this to extract tunneling information for the UE 100.

More specifically, when the UE 100 establishes a call, the MME 410 requests a radio access bearer setup (E-RAB Setup Request) requesting the eNB 210 to establish a radio access bearer (RAB). ) Message, eNB 210 may transmit a radio access bearer setup response (E-RAB Setup Response) message in response to this.

When such a message is detected, the service server 600 may extract bearer information from the message, and add bearer information among tunneling information corresponding to the UE 100.

In addition, the eNB 210 may receive a radio access bearer release command (E-RAB Release Command) message, which is a message for releasing the allocated radio access bearer resource from the MME 410, and the MME 410 may receive the eNB (e.g. 210) can receive a radio access bearer release instruction (E-RAB Release Indication) message, the service server 600 detects such a message, extracts bearer information from the message, and corresponds to the UE 100 Therefore, the bearer information can be deleted from the generated tunneling information.

In addition, the service server 600 extracts a message related to radio resource release among S1AP messages transmitted and received between the eNB 210 and the MME 410, and deletes tunneling information for the UE 100 using the extracted message. You can.

More specifically, when the handover is completed by the S1 handover method, the MME 410 transmits a context release command message to the source eNB, and the source eNB is assigned to the UE 100 Context is released. That is, the source eNB can release radio resources and control plane related resources associated with the UE context, and the service server 600 monitoring them can delete information about the eNB corresponding to the UE 100.

In addition, in the handover preparation step, when the target eNB fails to allocate resources for the UE 100, the target eNB may transmit a handover failure message to the MME 410, and the MME 410 or eNB ( When a reset message is received from 210, the service server 600 that monitors it may be able to delete the tunneling information for the UE 100 based on this.

The S1 signaling message, that is, the S1AP message, which is used by the service server 600 to generate and manage tunneling information for each UE 100 is summarized as follows.

UE status S1 signaling message produce An initial context setup request message is transmitted from the MME, or
When an initial context setup response message, which is a response to the initial context setup request message, is transmitted from the eNB A handover request message is transmitted from the MME, or
When a handover request acknowledgment message, which is a response to the handover request message, is transmitted from the eNB A path switch request message is transmitted from the eNB, or
When a Path Switch Request Acknowledge message is transmitted from the MME in response to the path change request message. change E-RAB Setup Request message is transmitted from the MME, or
When a radio access bearer setup response message, which is a response to the radio access bearer setup request message, is transmitted from the eNB When a radio access bearer release command (E-RAB Release Command) message is transmitted from the MME When a radio access bearer release instruction (E-RAB Release Indication) message is transmitted from the eNB release When a UE Context Release Command message is transmitted from the MME When handover failure message is transmitted from eNB When a reset message is transmitted from MME or eNB

An example of generating tunneling information based on the S1 signaling message is illustrated in FIG. 6.

In the state in which the tunneling information for each UE 100 is generated, the service server 600 of the present invention can perform local domain processing as well as packet processing in the downward direction as well as the upward direction.

Hereinafter, a packet processing method for providing a local domain according to an embodiment of the present invention will be described.

7 and 8 are data flow diagrams for explaining in more detail a packet processing method for providing a local domain according to an embodiment of the present invention.

First, with reference to FIG. 7, a description will be given of a processing method when a search result for a domain query message transmitted by the UE 100 does not exist in the service server 600.

The UE 100 transmits a domain query message for the address of a specific external server to the eNB 210 of the access network 200 connected to the core network 400 (S201). At this time, the domain query message is in the form of an IP packet. Upon receiving this, the eNB 210 converts the IP packet into a GTP packet by adding a GTP header (S203). Then, the domain query message in the form of a GTP packet is transmitted to the core network 400 (S205). When the domain query message is received from the eNB 210, the switching device 300 that monitors packets transmitted and received between the access network 200 and the core network 400 transmits the received domain query message to the service server 600. (S207).

Then, the service server 600 restores the domain query message in the form of a GTP packet into an IP packet (S209), checks the domain (S211), and searches for address information of an external server corresponding to the domain name. As a result of the search, if the corresponding address information does not exist (S213), the service server 600 converts it back to the original GTP packet and transmits it back to the switching device 300 (S217).

The switching device 300 delivers it to the S-GW 420 of the core network 400, and the S-GW 420 delivers the GTP packet to the P-GW 430 according to a general packet processing procedure. The P-GW 430 converts the corresponding GTP packet into an IP packet, and then transmits it to a domain server (not shown) connected to the Internet network 500.

Hereinafter, a description will be given of a processing method when a search result for a domain query message transmitted by the UE 100 and the UE 100 exists in the service server 600.

Referring to FIG. 8, the UE 100 transmits a domain query message for an address of a specific external server to the eNB 210 of the connected access network 200 in order to deliver it to the core network 400 (S301). At this time, the domain query message is in the form of an IP packet. Upon receiving this, the eNB 210 converts the IP packet into a GTP packet by adding a GTP header (S303). Then, the domain query message in the form of a GTP packet is transmitted to the core network 400 (S305). When the domain query message is received from the eNB 210, the switching device 300 that monitors packets transmitted and received between the access network 200 and the core network 400 transmits the received domain query message to the service server 600. (S307).

Then, the service server 600 restores the domain query message in the form of a GTP packet into an IP packet (S309), checks the domain, and searches for address information of an external server corresponding to the domain name. As a result of the search, if the corresponding address information exists, the corresponding address information is checked (S311), and a response message including the address information is generated (S313).

Subsequently, the service server 600 checks the pre-stored tunneling information corresponding to the UE 100 to transmit the response message to the UE 100 through the access network 200 (S315), and based on this, GTP The header is generated (S317).

Then, the service server 600 adds a GTP header to the response message, converts the response message in the form of an IP packet into a GTP packet (S319), delivers the converted response message to the switching device 300, and the switching device 300 ) Forwards it to the eNB 210 (S323).

Upon receiving this, the eNB 210 restores the response message back to an IP packet (S325), and transmits the response message to the UE 100 in the form of an IP packet.

The packet processing method for providing a local domain according to an embodiment of the present invention has been described above.

The packet processing method for providing a local domain 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. In this case, a computer-readable medium suitable for storing computer program instructions and data includes, for example, a recording medium such as a hard disk, a magnetic medium such as a floppy disk and a magnetic tape (Magnetic Media), or a CD-ROM (Compact Disk Read Only Memory). , Optical Media such as DVD (Digital Video Disk), Magnetic-Optical Media such as Floptical Disk, and ROM (Read Only Memory), RAM (RAM) , Random Access Memory, Flash memory, EPROM (Erasable Programmable ROM), and semiconductor memory such as EEPROM (Electrically Erasable Programmable ROM). The processor and memory can be supplemented by, or incorporated into, special-purpose logic circuits. Examples of program instructions may include high-level language code that can be executed by a computer using an interpreter, etc., as well as machine language codes produced by a compiler. Such hardware devices may be configured to operate as one or more software modules to perform the operation of the present invention, and vice versa.

This specification includes details of many specific implementations, but these should not be understood as limiting on the scope of any invention or claim, but rather as a description of features that may be specific to a particular embodiment of a particular invention. It should be understood. Certain features that are described in this specification 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 can also be implemented in multiple embodiments individually or in any suitable subcombination. Further, although features may operate in a particular combination and may be initially depicted as so claimed, one or more features from the claimed combination may in some cases be excluded from the combination, and the claimed combination subcombined. Or sub-combinations.

Likewise, although the operations are depicted in the drawings in a particular order, it should not be understood that such operations should be performed in the particular order shown or in sequential order, or that all shown actions should be performed in order to obtain desirable results. In certain cases, multitasking and parallel processing may be advantageous. In addition, the separation of 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 in multiple software products. You should understand that you can.

The present invention relates to a packet processing method for providing a local domain, an apparatus therefor, and a packet processing method for providing a local domain capable of more effectively processing a domain query message of a terminal using a local service, and an apparatus for the same .

According to the present invention, a service server located between an access network and a core network accessed by a terminal receives a domain query message transmitted from the terminal, and transmits a response message to the terminal, thereby providing a more effective local domain. In the state in which the service server has previously established and managed tunneling information for each terminal, it is effective in providing more efficient packet processing when providing a response message for a domain query message without changing the design of the access network or the core network.

Through this, the present invention can contribute to the development of the mobile communication service industry. In addition, the present invention has industrial applicability since it is not only sufficient for commercial or commercial operation, but also practically and clearly.

100: UE 200: access network 210: eNB
300: switching device 400: core network 410: MME
420: S-GW 430: P-GW 500: Internet network
600; Service server 610: first interface unit
620: second interface unit 630: control unit
631: monitoring module 632: packet processing module
632a: Uplink processing module 632b: Downlink processing module
633: Tunneling management module 634: Domain management module
640: storage unit 641: tunneling information
700: external server

Claims (13)

Monitoring module for receiving a domain query message for the server's IP address information from the terminal;
A domain management module that searches IP address information of the server and generates a response message that is a first format packet including the IP address information of the server when a search result exists;
A packet processing module that converts the response message into a second format packet using tunneling information for the terminal, and then transmits the converted response message to the terminal;
A tunneling management module generating tunneling information for the terminal by using an S1 signaling message between a base station of an access network and a mobility management device of a core network; Including,
The tunneling management module
An initial context setup request message transmitted from the mobility management apparatus to the base station among S1 signaling messages transmitted and received between the base station of the access network and the mobility management apparatus of the core network, and a response to the initial context setup request message In the initial context setup response (Initial Context Setup Response) message, which is a message transmitted from the base station to the mobility management device, a handover request message transmitted from the mobility management device to the base station, the handover request message In response, a handover request acknowledgment message, which is a message transmitted from the base station to the mobility management apparatus, a path switch request message transmitted from the base station to the mobility management apparatus, and the path change If at least one of in response to a request message from the mobility management device is a path change request confirmation message transmitted to the base station (Path Switch Request Acknowledge) message is detected,
Local domain processing apparatus characterized in that it extracts the tunneling information for the terminal and stores the extracted tunneling information corresponding to the terminal. ◈ Claim 2 was abandoned when payment of the registration fee was set.◈ According to claim 1,
The first format packet is a Transmission Control Protocol / Internet Protocol (TCP / IP) packet,
The second type packet is a GTP (General Packet Radio Service Tunneling Protocol) packet, the local domain processing apparatus. According to claim 1,
The domain query message is a second format packet with a second format header added to the first format packet,
The packet processing module
And converting the domain query message, which is the second format packet, into a first format packet and transmitting the converted domain query message to the domain management module. ◈ Claim 4 was abandoned when payment of the set registration fee was made.◈ According to claim 1,
The tunneling information
Stream Control Transmission Protocol (Stream Control Transmission Protocol), the terminal context (UE Context), bearer (E-RAB) Local domain processing apparatus characterized in that it comprises at least one of the information. ◈ Claim 5 was abandoned when payment of the set registration fee was made.◈ According to claim 1,
The packet processing module
Local domain processing characterized in that a second type header is generated by extracting a base station TEID (Tunnel Endpoint IDentifier), a base station IP, and a serving gateway TEID (Tunnel Endpoint IDentifier) for packet transmission among tunneling information stored in response to the UE. Device. delete delete ◈ Claim 8 was abandoned when payment of the set registration fee was made.◈ According to claim 1,
The tunneling management module
Among the S1 signaling messages transmitted and received between the base station of the access network and the mobility management device of the core network, a radio access bearer setup request message or an radio access bearer setup request message transmitted from the mobility management device to the base station When an E-RAB Setup Response message, which is a message transmitted from the base station to the mobility management device in response to an E-RAB Setup Response message, is detected, the bearer information is wirelessly connected to the tunneling information stored in response to the terminal. The extracted bearer information is added using a bearer setup request message or a radio access bearer setup response message,
When a radio access bearer release command (E-RAB Release Command) message transmitted from the mobility management device to the base station or a radio access bearer release instruction (E-RAB Release Indication) message transmitted from the base station to the mobility management device is detected. , Deleting bearer information among tunneling information for the terminal, the local domain processing apparatus. ◈ Claim 9 was abandoned when payment of the set registration fee was made.◈ According to claim 1,
The tunneling management module
Of the S1 signaling messages transmitted and received between the base station of the access network and the mobility management device of the core network, a UE Context Release Command message transmitted from the mobility management device to the base station, delivered from the base station to the mobility management device When at least one of the handover failure message, the reset message transmitted from the mobility management device to the base station or from the base station to the mobility management device is detected,
Local domain processing apparatus characterized in that for deleting the tunneling information for the terminal. Receiving a domain query message for the server's IP address information from the terminal;
Searching for IP address information of the server;
Generating a response message of a first format packet including the IP address information of the server when the IP address information of the server exists as a result of the search;
Converting the response message into a second format packet using tunneling information for the terminal; And
And transmitting a response message converted to the second format packet to the terminal.
In the step of receiving the message,
The tunneling information for the terminal is generated by using the S1 signaling message between the base station of the access network and the mobility management device of the core network, and the mobility management device is among the transmitted and received S1 signaling messages between the base station of the access network and the mobility management device of the core network. Initial Context Setup Request (Initial Context Setup Request) message, which is transmitted from the base station to the mobility management device in response to the initial context setup request message (Initial Context Setup Response) A message, a handover request message transmitted from the mobility management device to the base station, and a handover request confirmation, which is a message transmitted from the base station to the mobility management device in response to the handover request message (Handover Request Ackno) wledge) message, a path change request message transmitted from the base station to the mobility management apparatus (Path Switch Request) message, and a path change request confirmation, which is a message transmitted from the mobility management apparatus to the base station in response to the path change request message ( If at least one of the Path Switch Request Acknowledge) message is detected,
A packet processing method for providing a local domain, wherein tunneling information for the terminal is extracted and the extracted tunneling information is stored corresponding to the terminal. The method of claim 10,
The domain query message is a second format packet with a second format header added to the first format packet,
After the step of receiving the domain query message,
Converting the second format header into a first format packet in which the second format header is removed from the domain query message that is the second format packet;
Packet processing method for providing a local domain, characterized in that it further comprises. The method of claim 11,
After the step of retrieving the IP address information of the server,
If the IP address information of the server does not exist as a result of the search, adding a second format header to the domain query message converted to the first format packet and re-converting to a second format packet; And
Controlling the converted second type packet response message to be delivered to the core network;
Packet processing method for providing a local domain, characterized in that it further comprises. delete

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