KR20120071699A - Apparatus and method for providing service of home agent and mobile terminal - Google Patents

Apparatus and method for providing service of home agent and mobile terminal Download PDF

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Publication number
KR20120071699A
KR20120071699A KR1020100133350A KR20100133350A KR20120071699A KR 20120071699 A KR20120071699 A KR 20120071699A KR 1020100133350 A KR1020100133350 A KR 1020100133350A KR 20100133350 A KR20100133350 A KR 20100133350A KR 20120071699 A KR20120071699 A KR 20120071699A
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South Korea
Prior art keywords
mobile node
packet
service
mobile
home agent
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KR1020100133350A
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Korean (ko)
Inventor
진성일
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주식회사 케이티
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Priority to KR1020100133350A priority Critical patent/KR20120071699A/en
Publication of KR20120071699A publication Critical patent/KR20120071699A/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/26—Network addressing or numbering for mobility support
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/18—Service support devices; Network management devices
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Databases & Information Systems (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

PURPOSE: A service providing apparatus of a home agent, method, and portable terminal are provided to offer network-attached storage service to a mobile node by supporting a file sharing service between portable terminals. CONSTITUTION: A home agent function unit(112) manages a temporary address of a mobile node. The home agent function unit processes packets received from the mobile node and packet transmitted to the mobile node by using the temporary address. An NAS(Network-Attached Storage) providing unit(114) includes a storage unit(1143). The NAS providing unit provides an NAS service to the mobile node by using a mobile IP(Internet Protocol).

Description

Apparatus and method for providing a home agent and a mobile terminal {APPARATUS AND METHOD FOR PROVIDING SERVICE OF HOME AGENT AND MOBILE TERMINAL}

The present invention relates to a service providing apparatus and method for a home agent and a mobile terminal.

Due to the activation of wireless access, the next-generation network will become the access network in which the mobile terminal is the main, and one of the most important requirements in such a network environment is the provision of seamless services for the mobile terminal. That is, the user of the mobile terminal is free to move and receive services through various access networks according to the preference of the user or network operator, the network must provide such services psychologically.

In order to provide a seamless service to a user of a mobile terminal, the Internet Engineering Task Force (IETF) has proposed a mobile IP.

Mobile IP uses the home address (HoA) of the mobile node and its corresponding temporary address (Care of Address, CoA) .The two IP addresses are used to support the mobility of the mobile node. Home Agent and Foreign Agent. In this case, the home agent and the external agent perform a procedure for supporting the mobile terminal when the mobile terminal moves from the home network to the external network while communicating with the counterpart terminal.

On the other hand, various wireless services are exploding in the next generation network, and if the servers for providing these wireless services individually exist in the next generation network, the complexity of the network may be greatly increased.

The technical problem to be solved by the present invention is to provide an apparatus and method for providing a service of a mobility support agent that can reduce the complexity of the network.

According to an embodiment of the present invention, a service providing apparatus of a home agent is provided. The service providing apparatus of the home agent includes a home agent function unit and a NAS (network-attached storage) providing unit. The home agent function manages the temporary address of the mobile node and processes packets destined for the mobile node and packets received from the mobile node using the temporary address. The NAS providing unit includes a storage storing a file and provides a network-attached storage (NAS) service to a mobile node connected by using the mobile IP.

According to another embodiment of the present invention, a mobile terminal communicating with a home agent is provided. The mobile terminal includes a mobile IP client unit and a file sharing unit. The mobile IP client unit requests registration of its temporary address from the home agent and receives a response to the request from the home agent. The file sharing unit operates after receiving the response, and accesses a home agent using the temporary address to receive a network-attached storage (NAS) service from the home agent.

According to another embodiment of the present invention, a service providing method of a home agent is provided. The service providing method may include: registering a temporary address of the mobile node from a mobile node, registering a temporary address of the mobile node with a fixed address of the mobile node, and registering the mobile node with a fixed address of the mobile node; When receiving a network-attached storage (NAS) service related packet using a temporary address, providing a service corresponding to the NAS service related packet to the mobile node.

According to an embodiment of the present invention, by integrating network-attached storage (NAS) in a mobility support agent such as a home agent or an external agent, between mobile terminals connected while supporting mobility of the mobile node in the mobility support agent. Can support file sharing services. As described above, as one device provides various services, network complexity may be reduced.

1 is a view showing an example of a network for explaining the concept of a mobile IP applied to the present invention.
2 is a diagram illustrating a service providing apparatus of a mobility support agent according to an embodiment of the present invention.
3 is a diagram illustrating a service providing apparatus according to an exemplary embodiment of the present invention.
4 is a diagram illustrating a mobile node according to an exemplary embodiment of the present invention.
5 and 6 are flowcharts illustrating a service providing method of a service providing apparatus according to the first and second exemplary embodiments of the present invention, respectively.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and like reference numerals designate like parts throughout the specification.

Throughout the specification and claims, when a section is referred to as "including " an element, it is understood that it does not exclude other elements, but may include other elements, unless specifically stated otherwise.

An apparatus and method for providing a service of a mobility support agent according to an embodiment of the present invention will now be described in detail with reference to the accompanying drawings.

1 is a view showing an example of a network for explaining the concept of a mobile IP applied to the present invention.

Referring to FIG. 1, a network system for supporting mobile IP includes a home agent (hereinafter referred to as "HA") 100 and an external agent (hereinafter referred to as "FA") 200. Node (Mobile Node) 300 is included.

The HA 100 is a router of the home network of the mobile node 300, and registers and manages a home address (HoA) of the mobile node 300 and a temporary address (Care of Address, CoA) corresponding thereto, The advertisement message is transmitted so that the packet destined for the mobile node 300 reaches itself, and the packet is destined for the mobile node 300 and tunneled to the CoA of the mobile node 300. The HoA is a fixed IP address that is used as a destination address by a counterpart node that wants to communicate with the mobile node 300 as an address received from the home network to which the mobile node 300 first connected. CoA is a new address obtained when the mobile node 300 registers with the FA 200 and is the end point of the tunnel destined for the mobile node 300.

When the mobile node 300 moves to an external network, mobility binding information paired with its HoA and CoA allocated based on the current location is registered in the HA 100. The registration process of the mobile node 300 and the HA 100 may be processed directly in the HA 100 or through the FA 200 of the currently located network.

The HA 100 transmits a packet directly when the mobile node 300 is in its service area, but when the mobile node 300 is connected to an external network, the mobile node 300 accesses the packet through tunneling. It will be sent to the external network. The endpoint address of the tunnel used at this time becomes CoA and various encapsulation techniques such as IP in IP are proposed as a methodology for tunneling.

When the mobile node 300 obtains a co-located CoA (CCoA) as a temporary address through the Dynamic Host Configuration Protocol (DHCP), the HA 100 registers and manages the CCoA with the temporary address of the mobile node 300. Can be.

The FA 200 is a router located in a network visited by the mobile node 300. The FA 200 assists the mobile node 300 in registering the CoA with the HA 100, and transmits the tunneled packets from the HA 200 to the mobile node. Forward to 300. In addition, the FA 200 acts as a router capable of sending packets made by the mobile node 300. In this case, the CCoA may directly perform the registration process with the HA 100 without passing through the FA 200.

The mobile node 300 is a terminal that supports mobile IP, and may continue communication using its own IP address even when the mobile node 300 moves from one network or subnetwork to another without changing its IP address. To this end, the mobile node 300 is assigned a static IP address in the home network where the first connection is initiated, and receives a temporary IP address of CoA from an external agent located in the external network as it moves to the external network. Meanwhile, the mobile node 300 may be assigned CCoA as a temporary address through DHCP.

In Mobile IP, these two IP addresses (HoA, CoA or CCoA) are used in combination. When CoA is used, the process of transmitting a packet consists of a process in which the partner node sends a packet to the HoA provided by the home network, and the HA 100 located in the home network retransmits the packet to the CoA of the FA 200. . On the other hand, when the CCoA is used, the process of transmitting the packet is that when the partner node sends the packet to the HoA provided by the home network, if the HA 100 located in the home network transmits the packet to the CCoA, the mobile node 300 You will receive this packet.

According to an embodiment of the present invention, a mobility support agent such as HA 100 provides a network-attached storage (NAS) function. Here, NAS service means a network storage service.

This embodiment will be described in detail with reference to FIGS. 2 and 3.

2 is a diagram illustrating a service providing apparatus of a mobility support agent according to an embodiment of the present invention.

Referring to FIG. 2, the mobility support agent 100 includes a service providing device 110. The service providing apparatus 110 may be a mobility support agent 100.

The service providing apparatus 110 is a NAS service to a remote terminal 10 connected through various networks such as a broadband wireless communication network such as WiMAX, an internet network, or a high speed downlink packet access (HSDPA) network. To provide. That is, the service providing apparatus 110 provides an input / output unit in a file unit, thereby providing an environment in which remote terminals on various networks share files with each other. The service providing device 110 performs an external hard role from the mobile node 200 point of view, and the file server may provide an improved effect on stability or data protection than an actual external touch hard drive.

In addition, the service providing apparatus 110 provides mobility of the remote terminal 10 when the remote terminal 10 is the mobile node 300 as shown in FIG. 1. That is, when the remote terminal 10 has a mobile IP client function for supporting mobile IP, the service is seamless to the remote terminal 10 when the remote terminal 10 moves from the home network to the external network, for example. Provides.

3 is a diagram illustrating a service providing apparatus according to an exemplary embodiment of the present invention.

Referring to FIG. 3, the service providing apparatus 110 includes a home agent function unit 112 providing mobility of the mobile terminal 300 and a NAS providing unit 114 providing NAS service.

The home agent function unit 112 includes a packet processing unit 1121, a routing information management unit 1122, a session processing unit 1123, and a message generating unit 1124, and the NAS providing unit 114 includes an internal interworking unit 1141. File server 1142 and storage 1143.

First, in the home agent function unit 112, the packet processing unit 1121 tunnels a packet destined for the mobile node 300 to the CoA of the mobile node 300, and a packet made at the mobile node 300 from the FA 200. Is received through tunneling, this packet is detuned and forwarded to the other node. In this case, when the destination of the packet received from the mobile node 300 is the home agent 100, the packet processor 1121 considers the packet to be a packet related to a NAS service and transmits the packet to the NAS provider 114.

The routing information manager 1122 may register the HoA and the CoA (or CCoA) of the mobile node 300 and manage the same as a routing table. The routing information manager 1122 updates and manages the CoA of the mobile node 300 in the routing table when the mobile node 300 moves to the external network.

The session processor 1123 processes and manages a session of the mobile node 300.

The message generator 1124 generates an advertisement message so that the packet destined for the mobile node 300 can reach it, and transmits the message to the packet processor 1121 to be transmitted through the packet processor 1121. The routing information manager 1122 In the case where the registration of the HoA and CoA (or CCoA) of the mobile node 300 is completed successfully, a registration response message is generated and transmitted to the packet processing unit 1121 to be transmitted through the packet processing unit 1121.

In the NAS provider 114, the file server 1141 operates in conjunction with the routing information manager 1122. That is, the file server 1141 permits the access of the mobile node 300 when the routing information management unit 1122 successfully registers the HoA and the CoA (or CCoA) of the mobile node 300, and accesses the mobile node 300. It performs the function of authenticating the node 300.

The file server 1141 processes a message including various commands of the mobile node 300 registered in the routing information management unit 1122 in association with the routing information management unit 1122, generates a response message, and generates a packet processing unit 1121. Transfer to the road to the road (300).

The file server 1141 communicates with the mobile node 300 using protocols such as Network File System (NFS) and Common Internet File System (CIFS), and uses the protocol to respond to requests from the mobile node 300. Therefore, the file is stored in the storage 1143 or the file stored in the storage 1143 is provided to the mobile node 300.

The storage 1143 stores various files.

4 is a diagram illustrating a mobile node according to an exemplary embodiment of the present invention.

Referring to FIG. 4, the mobile node 300 may be the remote terminal 10 shown in FIG. 2.

The mobile node 300 includes a network connection unit 310, a control unit 320, a mobile IP client unit 330, and a file sharing unit 340.

The network connection unit 310 includes a plurality of connection units, for example, a wireless LAN connection unit 311 that can be connected to a wireless LAN, a wireless connection unit 312 that can be connected to a broadband wireless communication network, and an HSDPA connection unit 313 that can be connected to an HSDPA network. And the like.

The controller 320 manages the connection parts 311, 312, and 313 of different heterogeneous networks, and controls transmission and reception of packets through one suitable connection part. In addition, the controller 320 controls the mobile IP client unit 330 and the file sharing unit 340.

The mobile IP client unit 330 generates a mobile IP registration request message, requests the HA 100 to register the mobile IP, and receives a mobile IP registration response message for the mobile IP registration request message from the HA 100. In addition, the mobile IP client unit 330 receives a data packet service using CoA or CCoA after receiving the mobile IP registration response message from the HA 100.

The file sharing unit 340 may operate after the registration of the CoA or CCoA of the mobile node 300 by the mobile IP client unit 330 is completed, and the file sharing unit 340 of the mobile node 300 may operate. CoA or CCoA may be used to access the file server 1141 to store a file or to receive a file.

On the other hand, unlike FIG. 4, a single device may perform both the functions of the mobile IP client unit 330 and the file sharing unit 340.

5 is a flowchart illustrating a service providing method of a service providing apparatus according to a first embodiment of the present invention.

Referring to FIG. 5, when the mobile node 300 moves to receive a CoA using an agent advertisement message from the FA 200 of an external network such as a broadband wireless communication network, an internet network, or an HSDPA network (S500), the mobile node The 300 determines whether the agent advertisement message is from a home network or an external network, and receives the CoA included in the agent advertisement message as a new temporary IP address if the agent advertisement message is received from an external network.

The mobile node 300 transmits a Mobile IP Registration Request message including its HoA and CoA to the HA 100 through the FA 200, and requests registration of the CoA to the HA 100 ( S510 ~ S520).

The HA 100 registers the CoA of the mobile node 300 and transmits a Mobile IP Registration Reply message to the mobile node 300 through the FA 200 (S530 to S540).

After completing the registration process, the mobile node 100 and the HA 100 may transmit and receive data packets (S550 to S560).

In addition, according to an embodiment of the present invention, after completing the registration process, the file sharing unit 340 of the mobile node 100 is operable. Therefore, when a NAS service is desired, the mobile node 100 may generate a packet requesting the corresponding service and access the NAS providing unit 114 of the HA 100 through the FA 200 to receive the corresponding service. There is (S570-S580). In this case, when the destination of the packet is itself, the HA 100 may determine the packet as a packet for requesting NAS service. Here, the packet for requesting NAS service may be a packet for requesting file storage to the storage 1143 or a packet for requesting file provision from the storage 1143.

6 is a flowchart illustrating a service providing method of a service providing apparatus according to a second exemplary embodiment of the present invention.

Referring to FIG. 6, the mobile node 300 may move and receive an CCoA by using an agent advertisement message from the FA 200 of the external network (S600).

When using the CCoA, the mobile node 300 may transmit a Mobile IP Registration Request message including its HoA and CCoA to the HA 100 without passing through the FA 200 (S610). .

The HA 100 registers the CCoA of the mobile node 300 and transmits a Mobile IP Registration Reply message to the mobile node 300 without passing through the FA 200 (S620).

After completing the registration process, the mobile node 100 and the HA 100 may transmit and receive data packets using the tunneling protocol (S630).

In addition, after completing the registration process, by generating a packet requesting a file sharing service of the mobile node 100 to access the NAS providing unit 114 of the HA (100), the mobile node 100 uses a tunneling protocol The service may be provided (S640).

As such, the HA 100 according to an exemplary embodiment of the present invention performs an external hard disk, so that mobile nodes connected to different networks can easily share files, and the HA 100 can also share these mobile nodes. To provide seamless mobility services.

An embodiment of the present invention is not implemented only through the above-described apparatus and / or method, but may be implemented through a program for realizing a function corresponding to the configuration of the embodiment of the present invention or a recording medium on which the program is recorded. Such an implementation can be easily implemented by those skilled in the art to which the present invention pertains based on the description of the above-described embodiments.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, It belongs to the scope of right.

Claims (16)

In the service providing apparatus of the home agent,
A home agent function unit which manages a temporary address of a mobile node and processes packets destined for the mobile node and packets received from the mobile node using the temporary address; and
NAS providing unit for storing a file, and provides a network-attached storage (NAS) service to the mobile node connected by using the mobile IP
Service providing device comprising a. The method of claim 1,
The home agent function unit,
Service providing apparatus for tunneling a packet destined for the mobile node to a temporary address of the mobile node to the mobile node. The method of claim 2,
And a packet destined for the mobile node includes a packet related to the NAS service. The method of claim 2,
And the temporary address of the mobile node is a care of address (CoA) or a co-located CoA (CCOA). The method of claim 1,
The home agent function unit,
Receiving a mobile IP registration request message from the mobile node to register a temporary address of the mobile node, and transmitting a mobile IP registration response message to the mobile node. The method of claim 1,
The home agent function unit,
And determining that the packet is a packet related to the NAS service when the destination of the packet received from the mobile node is the self. A mobile terminal communicating with a home agent,
A mobile IP client unit requesting the home agent to register its temporary address and receiving a response to the request from the home agent, and
The file sharing unit operates after receiving the response and receives a network-attached storage (NAS) service from the home agent by accessing a home agent using the temporary address.
A mobile terminal comprising a. The method of claim 7, wherein
At least one connection for connecting to at least one different network
A mobile terminal further comprising. The method of claim 7, wherein
The temporary address includes a care of address (CoA) or a co-located CoA (CCoA). The method of claim 7, wherein
The file sharing unit receives a NAS service using the home agent and tunneling protocol. In the service providing method of the home agent,
Requesting registration of a temporary address of the mobile node from the mobile node,
Registering the temporary address of the mobile node by mapping it to a fixed address of the mobile node, and
Providing a service corresponding to the NAS service related packet to the mobile node when receiving a network-attached storage (NAS) service related packet using the temporary address from the registered mobile node;
Service providing method comprising a. The method of claim 11,
The providing step,
Providing the service to the mobile node using a tunneling protocol. The method of claim 11,
The temporary address includes a care of address (CoA) or co-located CoA (CCoA). The method of claim 13,
If the temporary address is CoA,
Receiving the packet destined for the mobile node and tunneling and transmitting the packet to an FA corresponding to the CoA; and
Detuning the packet of the mobile node transmitted by tunneling from the FA to a destination;
Service providing method further comprising. The method of claim 13,
If the temporary address is CCoA,
Receiving a packet destined for the mobile node and transmitting the packet directly to the mobile node, and
Directly receiving a packet of the mobile node and transmitting the packet of the mobile node to a destination
Service providing method further comprising. 16. The method according to claim 14 or 15,
Sending to the destination,
Determining that the packet is the NAS service related packet when the destination of the packet of the mobile node is itself.
KR1020100133350A 2010-12-23 2010-12-23 Apparatus and method for providing service of home agent and mobile terminal KR20120071699A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101516973B1 (en) * 2014-03-20 2015-05-04 국방과학연구소 Method for supporting hybrid mobility based on Internet Protocol and Apparatus thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101516973B1 (en) * 2014-03-20 2015-05-04 국방과학연구소 Method for supporting hybrid mobility based on Internet Protocol and Apparatus thereof

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