KR101447104B1 - Access router and method for controlling handover using the same - Google Patents

Abstract

The present invention relates to an access router and a handover control method using the same. An access router according to an embodiment of the present invention includes: a communication unit for transmitting and receiving a message; A storage unit for storing an identifier and a location of the mobile terminal, and an identifier and a location of the remote terminal; When the mobile terminal receives a first mapping request message including an identifier of the mobile terminal and a new location request from the first access router newly accessed by the mobile terminal, the mobile terminal updates the location of the stored mobile terminal with the received new location, A second mapping request message including an identifier of the mobile terminal and a new location request to a second access router connected to the counterpart terminal, and transmits a third mapping request message including an identifier and a location of the counterpart terminal to the first access And a controller for controlling transmission to the router.

Description

[0001] ACCESS ROUTER AND HANDOVER CONTROL METHOD USING THE SAME [0002]

The present invention relates to an access router and a handover control method using the same.

The Internet Engineering Task Force (IETF) proposed a Locator and Identifier Separation Protocol (LISP) to address the scalability issues of the Internet. LISP consists of an EID (Endpoint Identifier) used in an end terminal to separate an identifier of an IP address from a locator and an RLOC (Routing Locator) used by a real Internet service provider in the core network for routing, . The mapping between the EID and the RLOC is performed by a tunnel router (TR) called an Ingress Tunnel Router (ITR) and an Egress Tunnel Router (ETR), and the mapping between the EID and the RLOC is performed through mapping and encapsulation Data is transmitted between a mobile node (MN) and a correspondent node (CN).

In other words, LISP is a proposed protocol for solving the addressing and routing problems of the Internet. It uses a tunnel router's interface blocks (ITR and ETR) And an identifier and an address of a user network. EID is a valid address in the user's network, and RLOC is the IP address used in the real router in the transit network.

An embodiment of the present invention is to provide an access router for shortening a delay time generated in a handover of a mobile station in a LISP environment and a handover control method using the same.

An object of the present invention is to provide an access router for reducing the amount of data processed by an access router newly accessed by the mobile terminal for handover of a mobile terminal in a LISP environment and a handover control method using the same do.

An access router according to an embodiment of the present invention includes: a communication unit for transmitting and receiving a message; A storage unit for storing an identifier and a location of the mobile terminal, and an identifier and a location of the remote terminal; When the mobile terminal receives a first mapping request message including an identifier of the mobile terminal and a new location request from the first access router newly accessed by the mobile terminal, the mobile terminal updates the location of the stored mobile terminal with the received new location, A second mapping request message including an identifier of the mobile terminal and a new location request to a second access router connected to the counterpart terminal, and transmits a third mapping request message including an identifier and a location of the counterpart terminal to the first access And a controller for controlling transmission to the router.

The control unit may control to transmit the first mapping response message for the first mapping request message to the first access router when the first mapping request message is received.

After the second mapping request message is transmitted, the communication unit may receive a second mapping response message for the second mapping request message from the second access router.

After the third mapping request message is transmitted, the communication unit may receive a third mapping response message for the third mapping request message from the first access router.

The controller may control to simultaneously transmit the second mapping request message and the third mapping request message.

When a second mapping response message for the second mapping request message is not received within a predetermined time from the second access router after the second mapping request message is transmitted, 2 mapping request message.

When a third mapping response message for the third mapping request message is not received within a predetermined time from the first access router after the third mapping request message is transmitted, 3 mapping request message.

A method for controlling handover of an access router according to an embodiment of the present invention includes: receiving a first mapping request message including an identifier of the mobile terminal and a new location from a first access router newly accessed by a mobile terminal; Updating the stored location of the mobile terminal with the new location; Transmitting a second mapping request message including an identifier of the mobile station and a new location to a second access router connected to the counterpart terminal; And transmitting, to the first access router, a third mapping request message including an identifier and a location of the counterpart terminal.

And transmitting a first mapping response message for the first mapping request message to the first access router after receiving the first mapping request message.

The method may further include receiving a second mapping response message for the second mapping request message from the second access router after transmitting the second mapping request message.

The method may further include receiving a third mapping response message for the third mapping request message from the first access router after transmitting the third mapping request message.

The transmitting of the second mapping request message and the transmitting of the third mapping request message may be performed simultaneously.

When the second mapping response message for the second mapping request message is not received within a predetermined time from the second access router after the step of transmitting the second mapping request message, And transmitting the second mapping request message to the second access router.

When the third mapping response message for the third mapping request message is not received within a predetermined time from the first access router after the step of transmitting the third mapping request message, And further transmitting the third mapping request message to the first access router.

A handover control method according to an embodiment of the present invention can be implemented by a computer-executable program and recorded on a computer-readable recording medium.

According to an embodiment of the present invention, a delay time occurring when a handover of a mobile station is performed in a LISP environment is shortened, and data loss can be reduced.

According to an embodiment of the present invention, a process performed in an access router to which a mobile station newly accesses for handover of a mobile station in a LISP environment is reduced, so that the processing speed of the access router can be increased.

1 is a diagram illustrating a network configuration for data transmission between a mobile terminal and a counterpart terminal according to an embodiment of the present invention.
2 is a block diagram illustrating an access router in accordance with an embodiment of the present invention.
3 is a diagram illustrating a process performed by a mobile terminal, an access router, and a counterpart terminal for handover of a mobile terminal according to an embodiment of the present invention.
4 is a view for explaining a handover control method of an access router according to an embodiment of the present invention.

Other advantages and features of the present invention and methods of achieving them will become apparent with reference to the embodiments described below in detail with reference to the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the invention to those skilled in the art. Is provided to fully convey the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims.

Unless defined otherwise, all terms (including technical or scientific terms) used herein have the same meaning as commonly accepted by the generic art in the prior art to which this invention belongs. Terms defined by generic dictionaries may be interpreted to have the same meaning as in the related art and / or in the text of this application, and may be conceptualized or overly formalized, even if not expressly defined herein I will not.

The terminology used herein is for the purpose of illustrating embodiments and is not intended to be limiting of the present invention. In the present specification, the singular form includes plural forms unless otherwise specified in the specification. As used herein, the terms' comprise 'and / or various forms of use of the verb include, for example,' including, '' including, '' including, '' including, Steps, operations, and / or elements do not preclude the presence or addition of one or more other compositions, components, components, steps, operations, and / or components. The term 'and / or' as used herein refers to each of the listed configurations or various combinations thereof.

It should be noted that the terms such as '~', '~ period', '~ block', 'module', etc. used in the entire specification may mean a unit for processing at least one function or operation. For example, a hardware component, such as a software, FPGA, or ASIC. However, '~ part', '~ period', '~ block', '~ module' are not meant to be limited to software or hardware. Modules may be configured to be addressable storage media and may be configured to play one or more processors. ≪ RTI ID = 0.0 >

Thus, by way of example, the terms 'to', 'to', 'to block', 'to module' refer to components such as software components, object oriented software components, class components and task components Microcode, circuitry, data, databases, data structures, tables, arrays, and the like, as well as components, Variables. The functions provided in the components and in the sections ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ' , '~', '~', '~', '~', And '~' modules with additional components.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings attached hereto.

According to an embodiment of the present invention, when the MN moves from a service area of an access router to a service area of another access router, an access router ( _ARold ) of the mobile station from the terminal is connected after the mobile access router (AR _new) identifier and a new locator (M-EID: M-LOC new) to be received, and updating a location of the mobile station the previously stored as the new position have.

Then, the access router AR _old accessed before the mobile terminal moves the identifier of the mobile node and the new location identifier (M-LOC _new ) to the access router (AR) to which the correspondent node _CN ), and handover of the mobile terminal can be performed by transmitting the identifier and the location identifier (C-LID) of the counterpart terminal to the access router AR _new accessed after the mobile terminal moves have.

FIG. 1 is a diagram illustrating a network configuration for data transmission between a mobile node (MN) and a correspondent node (CN) according to an embodiment of the present invention.

As shown in FIG. 1, the mobile node MN can access an access router through a base station (BS). The access router AR _{old to} which the mobile terminal is connected can construct a database by storing the identifier (M-EID) and the location register (M-LOC) of the mobile node (MN) in a memory. Also, the access router AR _{old to} which the mobile terminal is connected stores the identifier (C-EID) and the location (C-LOC) of the correspondent terminal (CN) in communication with the mobile terminal (MN) Can be constructed.

Similarly, the counterpart terminal CN can access the access router through the base station BS. The AR _{CN to} which the counterpart terminal is connected can store the identifier (C-EID) and the positioner (C-LOC) of the counterpart terminal (CN) in a memory, The database can be constructed by storing the identifier (M-EID) and the location (M-LOC) of the terminal (MN) in a memory.

The mobile node MN and the correspondent node CN can exchange data through a network including a base station (BS) and an access router (AR).

The mobile node MN moves out of the service area of the currently accessed access router AR _old to the service area of another access router AR _new while the mobile node MN and the correspondent node CN are communicating with each other case, the mobile node (MN) is tuned to the communication channel of the another access router (AR _new) is continuously maintained without interruption to the communication status of the data transfer. In this manner, when a handover occurs due to the movement of the MN, the access routers involved in communication between the MN and the CN update the location of the MN with a new location .

2 is a block diagram of an access router for controlling handover according to an embodiment of the present invention.

As shown in FIG. 2, the access router AR may include a communication unit 11, a storage unit 12, and a control unit 13. The communication unit 11 can send and receive messages. The storage unit 12 may store an identifier and a location identifier (M-LOC) of a mobile node (MN), and an identifier and a location identifier (C-LID) of a correspondent node have.

The controller 13 includes an identifier of the mobile node MN and a new location identifier M-LOC _new (M-LOC _new ) from the first access router AR _new newly accessed by the mobile node MN The M-LOC of the MN may be updated to the received M-LOC _new when the first mapping request message is received. The control unit 13 then transmits a second mapping request message including an identifier of the MN and a new M-EID (M-LOC _new ) to the first access router (AR _new) a third mapping request message including: a second access router (AR _CN) transmission, the identifier and the locator (C-LOC C-EID) of the correspondent node (CN) to To be transmitted.

According to an embodiment of the present invention, the access router for controlling the handover may be the access router ( _ARold ) accessed by the MN before the handover.

The communication unit 11 can transmit and receive a message to and from another access router, a mobile node (MN), or a correspondent node (CN) connected to the network. The communication unit 11 may be a communication module or a network interface that allows an access router to exchange data with other devices through a network.

The storage unit 12 may be a storage device such as an HDD, an SSD, or the like that stores data necessary for communication between the mobile node MN and the correspondent node CN.

The control unit 13 may control the handover process is performed when moving in the coverage area of the mobile node (MN) is another access router (AR _new).

FIG. 3 is a flow chart illustrating a process performed by a mobile node MN, an access router AR _CN , AR _old , AR _new , and a correspondent node CN for handover of a mobile node MN according to an embodiment of the present invention. Fig.

3, before the handover occurs, the mobile node MN and the correspondent node CN access the access router AR _{old to} which the mobile terminal is connected and the access router AR _{CN to} which the partner terminal is connected, Data can be exchanged through the network.

Then, the mobile node (MN) to build a different access router in the first access when moving in the coverage area of the router (AR _new), the mobile node (MN) is the first access router (AR _new) and the communication channel can do.

A mobile terminal (MN) and a first access router (AR _new) is a mobile terminal (MN) is an access router (AR _old) joined before establishing communication channel and transmit the first map request message (Map Request 1) , The previous access router AR _old may receive a first mapping request message (Map Request 1).

According to an exemplary embodiment, the first mapping request message (Map Request 1) may include an identifier (M-EID) of a mobile station and a new positioner (M-LOC _new ) according to movement of the mobile station.

According to one embodiment, the previous access router AR _old transmits a first mapping response message (Map Reply 1) to the first access router AR _new in response to the reception of the first mapping request message (Map Request 1) Can be transmitted.

When the previous access router AR _old receives the first mapping request message MAP request 1, the previous access router AR _old transmits the location request message to the mobile node MN stored in the storage unit 12 the M-LOC) may update the location to a new character (M-LOC _new).

Then, according to an embodiment of the present invention, the previous access router AR _{old transmits} a second mapping request message (MAP Request) to the second AR ₂₃₀ , which is an access router to which the correspondent node CN is connected, 2 and transmits a third mapping request message (Map Request 3) to the first access router AR _new newly accessed by the MN.

According to an embodiment of the present invention, the transmission of the second mapping request message (Map Request 2) and the transmission of the third mapping request message (Map Request 3) can be performed simultaneously, _old may perform one of the transmission of the second mapping request message (Map Request 2) and the transmission of the third mapping request message (Map Request 3) first, and then the other may be performed later.

According to one embodiment, the second MAP request message 2 may include an identifier of a mobile node (MN) and a new location identifier (M-LOC _new ). According to an embodiment, the third mapping request message (Map Request 3) may include an identifier of a correspondent node (CN) and a C-LOC (C-LOC).

The second access router (AR _CN) can transmit the second map request message (Map Request 2) a second mapping a response message in response to receipt by the previous access router (AR _old) of (Map Reply 2) have. The first to transmit the first access router (AR _new) is the third mapping request message (Map Request 3) in response to receiving the previous access router (AR _old) Third Mapping Response message (Map Reply 3) in the have.

When the second AR ₂₃₀ receives the second MAP request message, the second AR _{230 transmits} an identifier (M-LOC) of the MN 230 stored in the storage unit, ) To a new identifier (M-LOC _new ) included in the second mapping request message (Map Request 2).

The first access router (AR _new) is the third mapping request message (Map Request 3), the first access router (AR _new) upon receiving is the far-end terminal included in the third mapping request message (Map Request 3) ( (C-EID: C-LOC) of the CN can be stored in the storage unit to update the database.

As a result, the mobile node MN and the correspondent node CN do not pass the previous access router AR _old but are connected to the first access router AR _new newly accessed by the mobile node MN and the counterpart terminal CN, And the second access router (AR _CN ) connected to the second access router (AR).

According to an embodiment of the present invention, the previous access router (AR _old ) receives a second mapping from the second access router (AR _CN ) in a predetermined time in response to the transmission of the second mapping request message (Map Request 2) If not receiving the response message (map Reply 2), the previous access router (AR _old) can further transmit a second access router and the second mapping request message (map request 2) in (AR _CN).

According to one embodiment of the invention, a third mapping from the first access router (AR _new) in the previous access router (AR _old), the time preset in response to the transmission of the third mapping request message (Map Request 3) If not receiving the response message (map Reply 3), the previous access router (AR _old) can further transmit the first access router (AR _new) and the third mapping request message (map request 3) a.

4 is a view for explaining a handover control method of an access router according to an embodiment of the present invention.

The handover control method according to an embodiment of the present invention can be performed by an access router ( _ARold ) connected before the mobile node (MN) moves.

4, the handover control method 300 includes a step of receiving an identifier of the mobile node MN from a first access router AR _new newly accessed by the mobile node MN, And receiving a first mapping request message (Map Request 1) including a first mapping request message (-EID: M-LOC _new ).

Then, the handover control method 300 transmits the M-LOC of the MN stored in the storage unit to the M-LOC (M-LOC) included in the first mapping request message _new ) (step S33).

According to an embodiment, the handover control method 300 may further include a step of receiving (S31) the first mapping request message (Map Request 1) 1 maps the response message may further include a step (S32) for transmitting (map Reply 1) to the first access router (AR _new).

The handover control method 300 transmits a second mapping request message (Map Request 2) including an identifier of the MN (MN) and a new location identifier (M-LOC _new ) the third map request message including (map request 3: connected to a second access router, step (S34), and the identifier and the locator (C-LOC C-EID) of the correspondent node (CN) to be transmitted to (AR _CN) ) is a can comprising the step (S35) of transmitting to the first access router (AR _new).

The steps S34 and S35 may be performed simultaneously, but either one of them may be performed first and the other may be performed later.

Upon receiving the second mapping request message (ARQ Request 2), the AR AR _{CN transmits} the location information (M-LOC) of the MN (MN) stored in the storage unit to a second mapping request message (M-LOC _new ) included in the new location (M-LOC _new ).

The first access router AR _new that has received the third mapping request message (MAP Request 3) transmits the identifier and the location of the counterpart terminal (CN) included in the third mapping request message (Map Request 3) : C-LOC) can be stored in the storage unit to update the database.

According to an embodiment of the present invention, the handover control method 300 may further comprise the step of transmitting (S34) a second mapping request message (Map Request 2) from the second access router (AR _CN ) And receiving a second mapping response message for the mapping request message (Map Request 2) (YES at S36). According to another embodiment, the handover control method 300 transmits a second mapping request message (Map Request 2) from a second AR (AR _CN ) after a second mapping request message (Map Request 2) to the second access router (AR _CN ) when it does not receive the second mapping response message (Map Reply 2) for the second access router (Request 2) can do.

According to one embodiment of the invention, the handover control method 300 is a third map request message (Map Request 3) the third from the after step (S35) of transmitting said first access router (AR _new) And receiving a third mapping response message for the mapping request message (Map Request 3) (YES in S37). According to another embodiment, the handover control method 300, the third mapping request message (Map Request 3) a third mapping request message (Map within the set time period from a first access router (AR _new) after sending request 3) third mapping response message (map Reply 3), if not received (NO in S37), the first access router (AR _new) to the third mapping request message (map request 3) for further transmission to the can do.

The handover control method 300 according to an embodiment of the present invention may be stored in a computer-readable recording medium that is manufactured as a program to be executed in a computer. The computer-readable recording medium includes all kinds of storage devices in which data that can be read by a computer system is stored. Examples of the computer-readable recording medium include ROM, RAM, CD-ROM, magnetic tape, floppy disk, optical data storage, and the like.

As described above, the access router performing the handover according to the movement of the mobile terminal in the LISP environment and the handover control method using the access router have been described. According to an embodiment of the present invention, a delay time occurring during a handover of a mobile station in a LISP environment is shortened, so that data loss due to handover can be reduced. In addition, the amount of data to be handled by the access router newly connected to the mobile terminal for handover is reduced, and the processing speed of the new access router can be increased.

MN: mobile terminal
CN:
AR _new : first access router
AR _CN : Second Access Router
11:
12:
13:

Claims (15)

A communication unit for transmitting and receiving a message;
A storage unit for storing an identifier and a location of the mobile terminal, and an identifier and a location of the remote terminal; And
And an access router for transmitting and receiving data between the mobile terminal and the counterpart terminal before handover to the first access router of the mobile terminal,
Wherein,
When the mobile terminal handover from the access router to the first access router receives a first mapping request message including an identifier of the mobile terminal and a new location from the first access router newly accessed by the mobile terminal Updates the location of the stored mobile terminal with the received new location,
Wherein the controller of the access router communicating with the mobile terminal before handover of the mobile terminal transmits a second mapping request message including an identifier of the mobile terminal and a new location request from the access router to the access router, And a third mapping request message including an identifier and a location of the counterpart terminal is directly transmitted from the access router to the first access router without going through the second access router, An access router for controlling the transmission of data. The method of claim 1, wherein
The control unit includes:
And to transmit the first mapping response message for the first mapping request message to the first access router when the first mapping request message is received. The method according to claim 1,
Wherein after the second mapping request message is transmitted, the communication unit receives a second mapping response message for the second mapping request message from the second access router. The method according to claim 1,
Wherein after the third mapping request message is transmitted, the communication unit receives a third mapping response message for the third mapping request message from the first access router. The method according to claim 1,
The control unit includes:
And controls transmission of the second mapping request message and transmission of the third mapping request message at the same time. The method according to claim 1,
When a second mapping response message for the second mapping request message is not received within a predetermined time from the second access router after the second mapping request message is transmitted, 2 < / RTI > mapping request message. The method according to claim 1,
When a third mapping response message for the third mapping request message is not received within a predetermined time from the first access router after the third mapping request message is transmitted, 3 < / RTI > mapping request message. A handover control method performed by an access router that transmits and receives data between the mobile terminal and a counterpart terminal before handover to a first access router of the mobile terminal,
When the mobile terminal handover from the access router to the first access router receives a first mapping request message including an identifier of the mobile terminal and a new location address from the first access router newly accessed by the mobile terminal step;
Updating the stored location of the mobile terminal with the new location;
The access router communicating with the mobile terminal before handover of the mobile terminal transmits a second mapping request message including an identifier of the mobile terminal and a new location request from the access router to the access router, Transmitting directly to a second access router connected to the terminal; And
The access router communicating with the mobile terminal before handover of the mobile terminal transmits a third mapping request message including an identifier and a location of the counterpart terminal from the access router to the first access router, Directly to an access router;
Wherein the handover control method comprises the steps of: 9. The method of claim 8,
After receiving the first mapping request message,
And transmitting a first mapping response message for the first mapping request message to the first access router. 9. The method of claim 8,
After transmitting the second mapping request message,
And receiving a second mapping response message for the second mapping request message from the second access router. 9. The method of claim 8,
After transmitting the third mapping request message,
And receiving a third mapping response message for the third mapping request message from the first access router. 9. The method of claim 8,
Wherein the step of transmitting the second mapping request message and the step of transmitting the third mapping request message are simultaneously performed. 9. The method of claim 8,
After transmitting the second mapping request message,
Further transmitting the second mapping request message to the second access router if a second mapping response message for the second mapping request message is not received within a predetermined time from the second access router;
Further comprising the steps of: 9. The method of claim 8,
After transmitting the third mapping request message,
Further transmitting the third mapping request message to the first access router if a third mapping response message for the third mapping request message is not received within a predetermined time from the first access router;
Further comprising the steps of: A computer-readable recording medium,
A recording medium on which a program for executing a handover control method according to any one of claims 8 to 14 is recorded.

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