KR102222478B1 - Lte communication system, control method thereof, pgw and ha comprised in the system, control method thereof - Google Patents

Abstract

The present invention relates to an LTE communication system and a control method thereof, and to a PGW and HA included in the system and a control method thereof. The control method of a Long Term Evolution (LTE) communication system including a PDN Gateway (PGW) and a Home Agent (HA) defined in a 3rd Generation Partnership Project (3GPP) according to the present invention can be provided by the PGW to a terminal. Storing a matching table in which IP POOL information corresponding to the existing network address band information and HA IP information corresponding to the network address of a specific HA are matched; When the PGW detects an LTE connection request from the terminal, a primary network address, which is any one network address available from the IP POOL information, is extracted and assigned to the terminal, and the network address of the HA matched with the IP POOL information and Transmitting an access response signal including all the primary network addresses to the terminal that transmitted the LTE access request; When the HA receives a connection request signal including the primary network address from the terminal receiving the response signal of the PGW, the primary network address included in the connection request signal is assigned to the secondary network address of the corresponding terminal. Thereafter, it characterized in that it comprises the step of transmitting a connection response signal including the assigned secondary network address to the terminal.

Description

LTE communication system and its control method and PGW, HA and its control method included in the system {LTE COMMUNICATION SYSTEM, CONTROL METHOD THEREOF, PGW AND HA COMPRISED IN THE SYSTEM, CONTROL METHOD THEREOF}

The present invention relates to an LTE communication system and a control method thereof, and to a PGW and HA included in the system and a control method thereof.

Among the constituent entities of the Long Term Evolution (LTE) communication system defined in the 3rd Generation Partnership Project (3GPP), there are PGW (PDS Gateway) and HA (Home Agent), and currently, HA is included in the PGW.

Specifically, the functions of HA and PGW are logically defined for the LTE/WLAN (Long Term Evolution/Wireless LAN) merge structure using IFOM (IP Flow Mobility) in 3GPP Rel-10. PGW is in charge.

That is, in 3GPP interworking standards (23.402, 23.261, etc.) based on DSMIPv6 (RFC 5555) that defines IP flow mobility between heterogeneous networks such as LTE/WLAN, the HA function that plays the role of mobility IP anchor between heterogeneous networks is included in the PGW of LTE In other words, it is premised on the integrated structure of PGW and HA, and detailed operation for the separation structure is not specified.

As such, in the IFOM structure, HA, that is, DSMIPv6 (Dual Stack Mobile Internet Protocol Version 6) HA, is basically supposed to perform a function in the PGW in the case of LTE, but due to excessive terminal dependency, signaling and bearer overhead, and excessive load on the PGW, etc. Therefore, it is desired to separate the nodes of HA and PGW.

However, when the HA and PGW are physically separated and classified into separate nodes, according to the prior art, the IP address (CoA: Care of Address) allocated by the PGW for an EPS (Evolve Packet System) session to the corresponding terminal when a terminal is attached. ), and the IP address (HoA: Home of Address) allocated to the corresponding terminal allocated by the HA is independently allocated, and accordingly, routing is processed between the terminal and the PGW/HA in an IP-in-IP tunnel method. There is also a problem that it is necessary.

That is, the overhead of 20 bytes of IP header per traffic packet is increased due to the problem of allocating multiple IP addresses to one terminal session and routing through the IP-in-IP tunnel method within the entire LTE network between the terminal and the HA. There is a problem that needs to be added.

This packet flow process is illustrated in FIG. 1.

That is, when a packet destined for a terminal from an external server is received by the HA, a packet to which an outer header is added is transmitted between the HA and the terminal through the IP-in-IP tunnel.

Specifically, if the packet received by the HA from an external server consists of a header and a payload (here, the source IP of the header is the IP of the server, and the destination IP is the HoA assigned to the terminal session by the HA) via the PGW from the HA. Therefore, in the packet transmitted to the terminal, an outer header is added to this existing header (that is, it can be referred to as an inner header) (here, the source IP of the outer header is the HA address, and the destination IP is the CoA). In other words, overhead occurs between the eNB and the UE due to the addition of an outer header.

3GPP TS 23.402

The present invention was conceived to solve the above-described conventional problem, and its object is an LTE communication system that prevents unnecessary overhead and improves a redundant address allocation process when the PGW and HA are operated as separate nodes, and the same It is to provide the control method and the PGW, HA included in the system, and the control method.

In order to achieve the above object, a method of controlling a Long Term Evolution (LTE) communication system including a PDN Gateway (PGW) and a Home Agent (HA) defined in the 3rd Generation Partnership Project (3GPP) according to the present invention is provided in the PGW. A, storing a matching table in which IP POOL information corresponding to network address band information that can be provided to a terminal and HA IP information corresponding to a network address of a specific HA are matched; When the PGW detects an LTE connection request from the terminal, a primary network address, which is any one network address available from the IP POOL information, is extracted and assigned to the terminal, and the network address of the HA matched with the IP POOL information and Transmitting an access response signal including all the primary network addresses to the terminal that transmitted the LTE access request; When the HA receives a connection request signal including the primary network address from the terminal receiving the response signal of the PGW, the primary network address included in the connection request signal is assigned to the secondary network address of the corresponding terminal. Thereafter, it includes the step of transmitting a connection response signal including the allocated secondary network address to the terminal.

In addition, in order to achieve the above object, the control method of a PDN Gateway (PGW) communicating with a home agent (HA) defined in the 3rd Generation Partnership Project (3GPP) according to the present invention is a network address band that can be provided to a terminal. Storing a matching table in which IP POOL information corresponding to the information and HA IP information corresponding to a network address of a specific HA are matched; Transmitting and sharing the IP POOL information to an HA corresponding to the matched HA IP information; When detecting an LTE connection request from the terminal, a primary network address that is an available network address from the IP POOL information is extracted and assigned to the terminal, and the network address of the HA matched with the IP POOL information and the primary network address are extracted. And transmitting an access response signal including all of the network addresses to the terminal that transmitted the LTE access request.

In addition, in order to achieve the above object, a control method of a home agent (HA) communicating with a PDN Gateway (PGW) defined in a 3rd Generation Partnership Project (3GPP) according to the present invention includes a terminal receiving a response signal from the PGW. Receiving a connection request signal including a primary network address allocated to the PGW from the PGW; Allocating a primary network address included in the connection request signal as a secondary network address of a corresponding terminal; And transmitting a connection response signal including the allocated secondary network address to the terminal.

In addition, in order to achieve the above object, the LTE (Long Term Evolution) communication system including a PGW (PDN Gateway) and HA (Home Agent) defined in the 3rd Generation Partnership Project (3GPP) according to the present invention, the PGW , Stores a matching table that matches IP POOL information corresponding to the network address bandwidth information that can be provided to the terminal and HA IP information corresponding to the network address of a specific HA, and detects the LTE access request from the terminal, the IP POOL An access response signal including both the network address of the HA and the primary network address matched to the IP POOL information by extracting a primary network address that is an available network address from the information and assigning it to the terminal is transmitted to the LTE It transmits to the terminal that transmitted the connection request, and when the HA receives the connection request signal including the primary network address from the terminal receiving the response signal of the PGW, the primary network address included in the connection request signal is After allocating to the secondary network address of the corresponding terminal, a connection response signal including the allocated secondary network address is transmitted to the terminal.

In addition, in order to achieve the above object, the PGW (PDN Gateway) communicating with the Home Agent (HA) defined in the 3rd Generation Partnership Project (3GPP) according to the present invention corresponds to the network address bandwidth information that can be provided to the terminal. A storage unit for storing a matching table in which IP POOL information and HA IP information corresponding to a network address of a specific HA are matched; A data sharing unit that transmits and shares the IP POOL information to an HA corresponding to the matched HA IP information; A request receiving unit for receiving an LTE connection request from the terminal; A terminal address allocator for extracting a primary network address, which is one available network address from the IP POOL information, and assigning it to the terminal when detecting reception of the LTE access request from the terminal; And a transmission unit for transmitting an access response signal including both the network address of the HA and the primary network address matched with the IP POOL information to the terminal that transmitted the LTE access request.

In addition, in order to achieve the above object, a home agent (HA) communicating with a PDN Gateway (PGW) defined in a 3rd Generation Partnership Project (3GPP) according to the present invention is provided with the PGW from the terminal receiving the response signal of the PGW. A request receiving unit for receiving a connection request signal including a primary network address allocated to the device; A terminal address allocation unit for allocating a primary network address included in the connection request signal as a secondary network address of a corresponding terminal; And a transmission unit for transmitting a connection response signal including a secondary network address allocated to the terminal to the terminal.

As described above, according to the present invention, when the PGW and the HA are operated as separate nodes, unnecessary overhead in packets is prevented and redundant address allocation processes do not occur, thereby preventing unnecessary consumption of address resources.

1 is a flow chart of packet reception according to a conventional method,
2 is a schematic configuration diagram of an entire system including an LTE communication system according to an embodiment of the present invention,
3 is a functional block diagram of the PGW of FIG. 1,
Figure 4 is a functional block diagram of the HA of Figure 1,
5 is a flowchart of packet reception according to the method according to the present invention,
6 is a control flowchart of an LTE communication system according to an embodiment of the present invention.

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

Hereinafter, each embodiment according to the present invention is merely an example for aiding understanding of the present invention, and the present invention is not limited to this embodiment. In particular, the present invention may be configured with a combination of at least one or more of individual configurations, individual functions, or individual steps included in each embodiment.

And in the following description of each embodiment of the present invention, a description of the prior art that is not related to the features of the present invention may be partially omitted.

A schematic configuration of an entire communication system including a Long Term Evolution (LTE) communication system according to an embodiment of the present invention is shown in FIG. 2.

In FIG. 2, a user equipment (UE) 200 is a terminal operated by a user using a communication service, and may correspond to, for example, a mobile communication terminal such as a mobile phone or a smart phone.

In the UE 200, a "Universal Subscriber Identity Module (USIM) card with built-in IMSI (International Mobile Subscriber Identity) value for subscriber identification/authentication" can be inserted, and the UE 200 can also use an LTE chip. As it is built-in, it can be attached to the LTE network.

The LTE communication system 100 may include an evolved node B (eNB) 130, a PDN gateway (PGW) 110, and a home agent (HA) 120 as shown in FIG. 2.

Here, the LTE communication system 100 refers to a communication system related to LTE communication defined by 3GPP (3rd Generation Partnership Project), and more precisely, E-UTRAN (Evolved UTRAN (Universal Terrestrial Radio Access Network)) and EPC (Evolved Packet Core). It may mean an EPS (Evolve Packet System) including all. However, in this embodiment, for convenience, it means a communication system using LTE, and is referred to as an LTE communication system 100.

Of course, the LTE communication system 100 of FIG. 2 authenticates the SGW (Serving Gateway) and terminal 200 existing between the communication path between the eNB 130 and the PGW 110, manages the EPS bearer, and manages the subscriber's mobility status. A Mobility Management Entity (MME) that manages the system, a Home Subscriber Server (HSS) corresponding to the central database of the LTE network having key information for authentication and a subscriber profile for each UE 200 may be further included. Nodes are not directly related to the features of the present invention and correspond to a known configuration, so the illustration in FIG. 2 is omitted for convenience. However, the MME will be described as a node that communicates with the PGW 110 if necessary.

The eNB 130 may be referred to as an "LTE base station", and is an equipment that provides a wireless connection between the UE 200 and an LTE network. That is, in FIG. 2, it is preferable that the UE 200 and the eNB 130 are configured with a wireless connection, and all others are configured with a wired connection through Internet Protocol (IP) communication.

The PGW 110 performs a function of allocating an IP address as a primary network address to the terminal 200, and performs anchoring on Serving Gateways (SGWs) when a handover occurs. That is, when the UE 200 changes from SGW_1 to SGW2_ while moving (when moving from the eNB 130 managed by SGW_1 to the eNB 130 managed by SGW_2), the PGW 110 becomes the anchoring point. will be.

In addition, the PGW 110 applies different QoS policies for each UE 200 (performs actions such as priority, bandwidth control, etc.), and calculates Accounting Data (for example, the amount of uplink and downlink traffic, access time, etc.) for each UE 200. Manage. That is, the PGW 110 creates and manages a history of when each subscriber has accessed, how much data has been used, and for how long, and delivers the data to a predetermined billing system (for example, OFCS (Offline Charging System)). Performs a function.

In particular, the PGW 110 provides a matching table in which the IP POOL information corresponding to the network address band information that can be provided to the terminal 200 and the HA 120 IP information corresponding to the network address of the specific HA 120 are matched. Stored, and when detecting the LTE access request of the terminal 200 in this state, the primary network address, which is any one network address available from the IP POOL information, is extracted and assigned to the corresponding terminal 200, and the IP POOL A function of transmitting an access response signal including both the network address of the HA 120 matched with the information and the previously extracted primary network address to the terminal that transmitted the LTE access request.

For example, during the LTE access process of the terminal 200, the PGW 110 may receive a session creation request signal corresponding to the LTE access request signal of the terminal 200 from the MME (not shown). At this time, the PGW 110 ) Extracts any one IP address (for example, any one IP address that is not assigned to another terminal 200) from its own IP address pool (IP POOL information) and assigns it to the corresponding terminal 200. In this embodiment, the IP address allocated by the PGW 110 to the terminal 200 is referred to as a primary network address.

In addition, the PGW 110 generates a session creation response signal including both the primary network address allocated to the terminal 200 and the network address of the HA 120 matched to the IP address pool to the terminal side, specifically, the session creation. It transmits the request signal to the transmitted MME.

An example of the functional blocks of the PGW 110 is illustrated in FIG. 3.

As shown in the figure, the PGW 110 may include a storage unit 111, a data sharing unit 112, a request receiving unit 113, a terminal address allocation unit 114, and a transmission unit 115. have.

The storage unit 111 stores a matching table in which the IP POOL information corresponding to the network address band information that can be provided to the terminal 200 and the HA 120 IP information corresponding to the network address of the specific HA 120 are matched. Has been.

The data sharing unit 112 transmits and shares the IP POOL information stored in the storage unit 111 to the HA 120 corresponding to the matched HA 120 IP information. At this time, the data sharing unit 112 provides the IP POOL information and the IP address of the PGW 110 (PGW 110 IP) and/or the IP address of the HA 120 (HA 120 IP) to the HA 120 together. It may be transmitted, but since the PGW 110 IP and the HA 120 IP correspond to the source IP and the destination IP in IP communication, they may be included in the header according to the IP protocol.

The request receiving unit 113 performs a function of receiving an LTE connection request from the terminal 200. For example, the request receiving unit 113 may receive a session creation request signal from the MME as an LTE access request signal of the terminal 200.

When the terminal address allocation unit 114 detects that the LTE connection request signal of the terminal 200 has been received by the request receiving unit 113, a primary network address that is available from the IP POOL information stored in the storage unit 111 A function of extracting a network address and assigning it to the terminal 200 is performed.

The transmission unit 115 provides an LTE connection with an access response signal including both the network address of the HA 120 matched with the IP POOL information and the primary network address allocated to the terminal 200 from the terminal address allocation unit 114 Performs the function of transmitting the request to the terminal that transmitted the request.

Thereafter, the PGW 110 communicates with the eNB 130 through a GPRS Tunneling Protocol (GTP) tunnel, and communicates with the HA 120 through a Generic Routing Encapsulation (GRE) tunnel to support communication of the terminal 200.

On the other hand, the HA 120, that is, the DSMIPv6 (Dual Stack Mobile Internet Protocol Version 6) according to the present embodiment, the HA 120 has a termination function for security of DSMIPv6 signaling and an external IP network when the terminal 200 is connected. Provides the termination function of.

That is, the DSMIPv6 HA 120 directly communicates with the UE 200 at the front end of the IP network to enable LTE/WLAN merging using IP Flow Mobility (IFOM). For example, the UE 200 must go through the HA 120 in order to access an IP network (for example, the Internet), whether through LTE or WLAN.

In particular, the HA 120 is the primary terminal 200 that has received the response signal from the PGW 110, specifically the terminal 200 that has received the response signal from the MME that has received the session response signal of the PGW 110. When receiving a connection request signal including a network address, after allocating the primary network address included in the connection request signal as the secondary network address of the corresponding terminal 200, a connection response including the assigned secondary network address Performs a function of transmitting a signal to the terminal 200.

In addition, the HA 120 may share IP POOL information stored in each PGW 110 through periodic communication with each PGW 110.

In this case, the HA 120 determines whether the primary network address included in the connection request signal of the terminal 200 belongs to the IP POOL received from the PGW 110 before allocating the secondary network address to the terminal 200. As a result of the determination and determination, only when the corresponding primary network address is an address belonging to the IP POOL, the primary network address may be assigned as the secondary network address of the corresponding terminal 200.

Thereafter, the HA 120 supports communication of the terminal 200 by communicating with the PGW 110 through a GRE tunnel. That is, the HA 120 processes the downlink traffic received from the outside (IP network) to the terminal and transmits the GRE encapsulation to the PGW 110, and in the case of the PGW 110, the external IP network from the terminal 200 is similarly performed. GRE encapsulation is performed on the uplink traffic transmitted to and transmitted to the HA 120.

An example of the functional block of the HA 120 is shown in FIG. 4.

As shown in the figure, the HA 120 may include a storage unit 121, a data sharing unit 122, a request receiving unit 123, a terminal address allocation unit 124, and a transmission unit 125. have.

The storage unit 121 may store IP POOL information received from the PGW 110. In this case, in the storage unit 121, the IP address of the PGW 110 that has transmitted the corresponding IP POOL information and the corresponding IP POOL information may be matched and stored, and additionally, the HA 120 IP may be matched together.

The data sharing unit 122 performs a function of receiving IP POOL information by communicating with the PGW 110 and storing it in the storage unit 121. At this time, the data sharing unit 122 may extract the IP address of the PGW 110 that has transmitted the IP POOL information, and match the extracted IP address of the PGW 110 with the corresponding IP POOL information and store it in the storage unit 121 I can. Furthermore, the IP address of the HA 120 may be matched with the corresponding IP POOL information.

The request receiving unit 123 performs a function of receiving a connection request signal including a primary network address allocated to the PGW 110 from the terminal 200 receiving the response signal of the PGW 110.

The terminal address allocation unit 124 performs a function of allocating the primary network address included in the connection request signal to the secondary network address of the terminal 200.

The transmission unit 125 performs a function of transmitting a connection response signal including a secondary network address allocated to the terminal 200 to the terminal 200 that has transmitted the connection request signal.

Accordingly, the terminal 200 has the same IP (i.e., the primary network address) assigned from the PGW 110 and the IP (i.e., the secondary network address) assigned from the HA 120. It is regarded as and communicates with the HA 120 without using an IP-in-IP tunnel.

The flow of a packet received by the terminal 200 from an external server (not shown) through the HA 120 and the PGW 110 according to the present invention is illustrated in FIG. 5.

5, a GTP tunnel is formed between the eNB 130 and the PGW 110, a GRE tunnel is formed between the PGW 110 and the HA 120, and a packet consisting of a header and payload received from the outside is separate. It is transmitted to the terminal 200 in a state in which the header of (Outer header of FIG. 1) is not added.

At this time, encapsulation according to the GRE tunnel may be performed between the HA 120 and the PGW 110, and encapsulation may be performed according to the GTP tunnel between the PGW 110 and the eNB 130, but between the eNB 130 and the terminal 200 It is transmitted in the original packet state without any additional headers included. That is, the overhead in the radio section can be improved as compared with the conventional method.

That is, when comparing FIG. 1 showing the packet reception process according to the conventional method and FIG. 5 showing the packet reception process according to the present invention, the difference will be clearly understood.

In the end, according to the present invention, it is possible to prevent the wastage of IP resources caused by overlapping IP allocations, and also, there is an effect of preventing an increase in packets in a communication process, especially in a wireless section.

Hereinafter, a control flow of the LTE communication system 100 according to an embodiment of the present invention will be described with reference to FIG. 6.

First, the PGW 110 matches and stores the IFOM_CoA_IP_POOL corresponding to the IP POOL information with the address (IP address) of the specific HA 120 (step S1).

Subsequently, the PGW 110 transmits the IFOM_CoA_info_Update signal, which is a synchronization signal including IFOM_CoA_IP_POOL, to the HA 120 using the HA 120 address matched to the IFOM_CoA_IP_POOL (step S3).

The HA 120 matches and stores the IFOM_CoA_IP_POOL included in the IFOM_CoA_Info_Update signal with the address (IP address) of the PGW 110 that transmitted the IFOM_CoA_Info_Update signal (step S5), and then PGW the IFOM_CoA_Info_Ack signal which is a response signal to the IFOM_CoA_Info_Update signal. Transfer to 110 (step S7).

Meanwhile, the terminal 200 transmits an LTE Attach signal to the MME via the eNB 130 (step S9). At this time, the MME can authenticate the terminal 200 through communication with the HSS and obtain information on the PGW 110 to which the terminal 200 should access, but this process is only a known technique, so a more detailed description will be omitted. .

The MME transmits a Create Session Request signal corresponding to a kind of LTE access request to the PGW 110 according to the LTE Attach signal of the terminal 200 (step S11).

The PGW 110 extracts any one IP address from the pre-stored IFOM_CoA_IP_POOL according to the MME's Create Session Request and then assigns it to the corresponding terminal 200 (step S13). It is referred to as the first network address for this purpose. Here, allocating an IP address to the terminal 200 includes a case of allocating a separate IP address for each session. That is, the terminal 200 may create a plurality of sessions for communication. In this case, the PGW 110 may distinguish and allocate a separate IP address for each session to the corresponding terminal 200.

Subsequently, the PGW 110 transmits a Create Session Response, a kind of response signal, to the MME (step S15).At this time, in the Create Session Response, the HA 120 addresses matched to IFOM_CoA and IFOM_CoA_IP_POOL, which are IP addresses allocated to the corresponding terminal 200. DSMIP_HA 120_IP may be included.

Thereafter, DSMIP_HA (120)_IP, which is an address of the HA 120 matched to IFOM_CoA_IP_POOL, is transmitted from the MME to the terminal 200 via the eNB 130. Including this process, the EPS Session Establishment process may be performed (step S17).

Subsequently, the terminal 200 transmits a Binding Update signal, which is a type of connection request signal, to the HA 120 using the address of the HA 120 received from the MME (step S19), which is allocated from the PGW 110. IFOM_CoA, which is the received IP address, is included.

The HA 120 extracts IFOM_CoA from the Binding Update signal of the terminal 200 (step S21), and allocates the extracted IFOM_CoA as HoA to the terminal 200 (step S23). At this time, the IP address allocated to the terminal 200 by the HA 120 is referred to as a second network address for convenience.

As in the case of the PGW 110, the allocation of an IP address to the terminal 200 includes a case of allocating a separate IP address for each session. That is, the terminal 200 may create a plurality of sessions for communication. In this case, the HA 120 may distinguish a separate IP address for each session and allocate it to the corresponding terminal 200.

Subsequently, the HA 120 transmits a Binding Ack signal, which is a kind of response signal, to the terminal 200 (step S25), and the Binding Ack signal may include HoA, which is an IP address allocated by the HA 120 to the terminal 200. However, in the end, HoA is the same value as IFOM_CoA allocated by the PGW 110 to the terminal 200.

Thereafter, since the IP address assigned by the PGW 110 and the address assigned by the HA 120 are the same address, the terminal 200 communicates with the IP communication network via the PGW 110 and the HA 120. -Do not create an in-IP tunnel.

That is, the packet that the terminal 200 communicates with the IP communication network is transmitted/received between the eNB 130 and the PGW 110 using the GTP tunnel, and transmitted and received between the PGW 110 and the HA 120 through the GRE tunnel. In the wireless section, the process of adding the outer header as shown in FIG. 1 does not occur.

Therefore, unnecessary overhead in the radio section does not occur, and since the IP addresses allocated to the terminal 200 by the PGW 110 and the HA 120 are the same, there is an effect of saving IP address resources.

In the end, according to the present invention, in the IP Flow Mobility (IFOM) operation in a structure in which the PGW 110 and the HA 120 are separated, the LTE attached terminal 200 requests the first IFOM connection to the LTE bearer (Binding Update) In this case, the HA 120 refers to the Care of Address (CoA) included in the Binding Update and reassigns it to the Home of Address (HoA), thereby achieving the above-described various effects.

Meanwhile, it goes without saying that the process of performing each of the above-described embodiments may be performed by a program or application stored in a predetermined recording medium (eg, computer-readable). Here, the recording medium includes all of an electronic recording medium such as a random access memory (RAM), a magnetic recording medium such as a hard disk, and an optical recording medium such as a compact disk (CD).

In this case, the program stored in the recording medium may be executed on hardware such as a computer or a smart phone to perform each of the above-described embodiments. In particular, at least one of the functional blocks of the PGW and the HA according to the present invention described above may be implemented by such a program or application.

In addition, the present invention is not limited to the specific embodiments described above, but can be implemented by various modifications and modifications without departing from the gist of the present invention. It will be apparent that such modifications and modifications are included in the present invention if they fall within the appended claims.

100: LTE communication system 110: PGW
120: HA 130: eNB
200: UE
111,121: storage unit 112,122: data sharing unit
113,123: request receiving unit 114,124: terminal address allocation unit
115,125: transmission unit

Claims (14)

In the control method of a long term evolution (LTE) communication system including a PGW (PDN Gateway) and a home agent (HA) defined in a 3rd Generation Partnership Project (3GPP),
(a) storing, by the PGW, a matching table in which IP POOL information corresponding to network address band information that can be provided to a terminal and HA IP information corresponding to a network address of a specific HA are matched;
(b) When the PGW detects an LTE connection request from the terminal, a primary network address, which is any one network address available from the IP POOL information, is extracted and assigned to the terminal, and the HA matched with the IP POOL information is Transmitting an access response signal including both a network address and the primary network address to a terminal that has transmitted the LTE access request;
(c) When the HA receives a connection request signal including the primary network address from the terminal receiving the response signal of the PGW, the primary network address included in the connection request signal is transferred to the secondary network address of the corresponding terminal. After allocating to, transmitting a connection response signal including the allocated secondary network address to the terminal. The method of claim 1,
The PGW communicates with the HA through a Generic Routing Encapsulation (GRE) tunnel to support communication of a terminal. The method of claim 1,
The HA is a control method of an LTE communication system, characterized in that the sharing of the IP POOL information stored in the PGW through periodic communication with the PGW. The method of claim 3,
In the step (c), before allocating a secondary network address to the terminal, it is determined whether the primary network address included in the connection request signal belongs to the IP POOL, and as a result of the determination, the corresponding primary network address is the IP address. In the case of an address belonging to a POOL, the primary network address is assigned as a secondary network address of a corresponding terminal. In the control method of PGW (PDN Gateway) communicating with HA (Home Agent) defined in 3GPP (3rd Generation Partnership Project),
(a) storing a matching table in which IP POOL information corresponding to network address band information that can be provided to a terminal and HA IP information corresponding to a network address of a specific HA are matched;
(b) transmitting and sharing the IP POOL information to an HA corresponding to the matched HA IP information;
(c) When detecting an LTE connection request from the terminal, a primary network address, which is one network address available from the IP POOL information, is extracted and assigned to the terminal, and the network address of the HA matched with the IP POOL information and And transmitting an access response signal including all of the primary network addresses to the terminal that transmitted the LTE access request. In the control method of HA (Home Agent) communicating with PGW (PDN Gateway) defined in 3GPP (3rd Generation Partnership Project),
Receiving a connection request signal including a primary network address allocated to the PGW from a terminal receiving the response signal from the PGW;
Allocating a primary network address included in the connection request signal as a secondary network address of a corresponding terminal;
And transmitting a connection response signal including the allocated secondary network address to the terminal. A computer-readable recording medium storing a program for executing the method of any one of claims 1 to 6. An application stored in a medium for executing the method of any one of claims 1 to 6 in combination with hardware. In the LTE (Long Term Evolution) communication system including PGW (PDN Gateway) and HA (Home Agent) defined in 3rd Generation Partnership Project (3GPP),
The PGW stores a matching table in which IP POOL information corresponding to network address band information that can be provided to the terminal and HA IP information corresponding to the network address of a specific HA are matched, and detects an LTE connection request from the terminal. An access response signal including both the network address of the HA and the primary network address matched with the IP POOL information by extracting a primary network address that is an available network address from the IP POOL information and assigning it to the terminal To the terminal that transmitted the LTE connection request,
When the HA receives a connection request signal including the primary network address from the terminal receiving the response signal of the PGW, the HA assigns the primary network address included in the connection request signal to the secondary network address of the corresponding terminal. Thereafter, an LTE communication system comprising transmitting a connection response signal including the allocated secondary network address to the terminal. The method of claim 9,
The PGW communicates with the HA through a Generic Routing Encapsulation (GRE) tunnel to support communication of a terminal. The method of claim 9,
The HA is an LTE communication system, characterized in that to share the IP POOL information stored in the PGW through periodic communication with the PGW. The method of claim 11,
Before allocating a secondary network address to the terminal, it is determined whether the primary network address included in the connection request signal is an address belonging to the IP POOL, and as a result of the determination, the corresponding primary network address is an address belonging to the IP POOL. LTE communication system, characterized in that allocating the primary network address to the secondary network address of the terminal. In PGW (PDN Gateway) communicating with HA (Home Agent) defined in 3GPP (3rd Generation Partnership Project),
A storage unit for storing a matching table in which IP POOL information corresponding to network address band information that can be provided to a terminal and HA IP information corresponding to a network address of a specific HA are matched;
A data sharing unit that transmits and shares the IP POOL information to an HA corresponding to the matched HA IP information;
A request receiving unit for receiving an LTE connection request from the terminal;
A terminal address allocation unit for extracting a primary network address, which is an available network address from the IP POOL information, and assigning it to the terminal when detecting the reception of the LTE connection request from the terminal;
And a transmission unit for transmitting an access response signal including both the network address of the HA and the primary network address matched with the IP POOL information to the terminal that transmitted the LTE access request. In the HA (Home Agent) communicating with the PGW (PDN Gateway) defined in 3GPP (3rd Generation Partnership Project),
A request receiving unit for receiving a connection request signal including a primary network address allocated to the PGW from a terminal receiving the response signal of the PGW;
A terminal address allocation unit for allocating a primary network address included in the connection request signal as a secondary network address of a corresponding terminal;
And a transmission unit for transmitting a connection response signal including a secondary network address allocated to the terminal to the terminal.

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