KR100927940B1 - Location registration method and packet forwarding method using SRM in mobile network - Google Patents

Abstract

The present invention relates to a location registration method and a packet forwarding method using an SMR in a mobile network, and each of a mobile node (VMN) and a mobile router (MR) use their hierarchical mobile IP version 6 (HMIPv6) architecture. By adaptively performing location registration and packet transmission, taking into account the frequency and user session frequency, the total communication cost combined with the location registration cost and packet transmission cost can be reduced, and a large modification to the "NEMO" and HMIPv6 specifications It is intended to provide a location registration method and a packet forwarding method using SMR in a mobile network, which can effectively fuse the two techniques without the addition of.

To this end, the present invention, in the location registration method in a mobile network, the session arrival frequency for the location registration target mobile node (hereinafter referred to as "mobile node") divided by the movement frequency (Session-to-Mobility-Ratio : SMR value confirming step (hereinafter referred to as "SMR value"); An SMR value comparison step of comparing the SMR value with a predetermined value; A mobile node determination step of determining whether the mobile node which has confirmed the SMR value corresponds to a mobile router (MR) or a visited mobile node (VMN); And a location registration step of registering a location of the mobile node having determined the type based on a result of comparing the SMR values, wherein the location registration step includes: the mobile node being the mobile router (MR) and the SMR value being the predetermined value; If it is smaller than the value of, the Home Address (HoA) and the Local Temporary Address (RCoA) are sent to the Mobile Router Home Agent (HA_MR) as the binding update (BU), and the Local Temporary Address (RCoA) and the Link Temporary Address ( The LCoA) and the NEMO prefix are sent to the moving anchor point MAP as the binding update BU.

Mobile Node, Mobile Terminal, Router, Home Agent, HMIPv6, IPv6, SMR, Path, WiBro, IETF, NEMO

Description

Location registration and packet transfer method using the session-to-mobility-ratio for adaptive route optimization in mobile network

1 is a diagram illustrating an embodiment of a location registration process in Mobile IPv6 proposed by the existing IETF.

2 is a diagram illustrating an embodiment of a general hierarchical mobile IP (HMIP).

3 is a diagram illustrating a basic operation of a general "NEMO basic support protocol (Protocol)".

4 is a diagram illustrating an embodiment of a method for registering a location of a mobile router (MR) for adaptive path optimization in a mobile network according to the present invention;

5 is a diagram illustrating another embodiment of a method for registering a location of a mobile router (MR) for adaptive path optimization in a mobile network according to the present invention;

FIG. 6 is a diagram illustrating an embodiment of a location registration method of a visited mobile node (VMN) for adaptive path optimization in a mobile network according to the present invention; FIG.

7 is a diagram illustrating another embodiment of a location registration method of a visited mobile node (VMN) for adaptive path optimization in a mobile network according to the present invention;

8 is a diagram illustrating a method of delivering a packet to a mobile router (MR) for adaptive path optimization in a mobile network according to the present invention.

9 is a diagram illustrating another embodiment of a method for delivering a packet to a mobile router (MR) for adaptive path optimization in a mobile network according to the present invention.

10 is a diagram illustrating an embodiment of a method for delivering a packet to a visited mobile node (VMN) for adaptive path optimization in a mobile network according to the present invention.

11 is a diagram illustrating another embodiment of a method for delivering a packet to a Visited Mobile Node (VMN) for adaptive path optimization in a mobile network according to the present invention.

* Explanation of symbols for the main parts of the drawings

101: corresponding node (CN) 102: home agent (HA)

103: Old access router (104) AR: New access router (New AR)

105: mobile node (MN) 106: home address (HoA)

107: temporary address (CoA)

The present invention relates to a location registration method and a packet forwarding method in a mobile network, and more particularly, a VM and a mobile router each use a hierarchical mobile IP version 6 (HMIPv6) architecture. The present invention relates to a location registration method and a packet forwarding method using SMR in a mobile network, in which location registration and packet transmission can be adaptively taken into consideration in consideration of a movement frequency and a user session frequency.

Many researchers and companies expect to evolve into All-IP networks as the communications environment of the future. All-IP simply means that each terminal has an IP address (hereinafter, referred to as "IP") and connects the calling party to the receiving party using the IP address. Among them, WiBro (Wireless-Broadband) portable Internet service is ahead of the pilot service.

WiBro Portable Internet Services aims to provide end-to-end IP communications services to users anytime, anywhere. To support seamless wireless Internet access in this environment, mobility support at the IP layer is required, and the Internet Engineering Task Force (IETF) hereinafter referred to as "IETF" as a standard for supporting such mobility. We have proposed an IP layer mobility technique called Mobile IP (IP), and Mobile IPv6 (Request IPv6) is a Request For RFC for interworking with Internet version 6 (hereinafter referred to as "IPv6"). Comment).

Mobile In IPv6, a Home Agent (HA) is placed every time a user moves, so that other users who want to register with their home agent (HA) and communicate with users who move outside are home agents (HA). By inquiring to find out the location of the mobile user to communicate.

However, if the number of users using mobile IP increases significantly, the load on the network is increased because a large number of users have to register their locations as they move. In order to solve this problem, users focus on anchor points in a hierarchical manner that they do not deviate from the area within a predetermined range, thereby distinguishing between local mobility and global mobility to reduce location registration costs. The reduction scheme has also been proposed by the IETF as a Request For Comment (RFC) called Hierarchical Mobile IPv6 (hereinafter referred to as "HMIPv6").

When using the mobile Internet, users are expected to want to access the wireless Internet while traveling by means of transportation, mainly by bus or subway car. In this situation, when each user communicates by using a mobile IP, each user is transferred when a means of transportation such as a subway, which is carried by multiple users, moves from one cell to another cell. There is a problem that all of them need to register location information.

In order to solve the problem, the IETF is working on standardization by creating a working group called "Network Mobility" (NEMO) that supports network mobility.

The "NEMO Basic Support" technique proposed by the IETF introduces the concept of a mobile router called a mobile router (MR), which installs this router in a transportation means that the entire network moves when the transportation moves. We proposed a method of updating location information in a home agent (HA) corresponding to a router (MR) only.

The use of a mobile router (MR) reduces the cost of updating location information in a different way from HMIPv6.

As described above, in the "NEMO basic support protocol (Protocol)", when a mobile node (MN: Mobile Node) under the mobile router (MR) visits, an external node transmits data to the mobile node (MN). In the following, a problem arises that the home agent HA of the mobile node MN and the home agent HA of the mobile router MR are passed. In addition, when the mobile router MR visits the mobile router MR and the nesting is performed, the home agent HA may be increased. In this situation, a problem arises in that a packet transmission delay time becomes long. In addition, the "NEMO basic support protocol (Protocol)" also has a problem in that it does not adaptively cope with the characteristics of the movement of the transport or data transmission.

The present invention has been proposed to solve the above-mentioned problem. The hierarchical mobile IP version 6 (HMIPv6) architecture allows the mobile node (VMN) and the mobile router (MR) to synthesize their own mobile frequency and user session frequency, respectively. By adaptively performing location registration and packet transmission, the overall communication cost combined with location registration and packet transmission costs can be reduced, and both techniques can be effectively applied without significant modifications to the "NEMO" and HMIPv6 specifications. An object of the present invention is to provide a location registration method and a packet forwarding method using SMR in a mobile network that can be converged.

Other objects and advantages of the present invention can be understood by the following description, and will be more clearly understood by the embodiments of the present invention. Also, it will be readily appreciated that the objects and advantages of the present invention may be realized by the means and combinations thereof indicated in the claims.

A first method of the present invention for achieving the above object is, in a location registration method in a mobile network, a value obtained by dividing a session arrival frequency for a location registration target mobile node (hereinafter referred to as a "mobile node") by a moving frequency ( Session-to-Mobility-Ratio (hereinafter referred to as " SMR value ") to confirm the SMR value checking step; An SMR value comparison step of comparing the SMR value with a predetermined value; A mobile node determination step of determining whether the mobile node which has confirmed the SMR value corresponds to a mobile router (MR) or a visited mobile node (VMN); And a location registration step of registering a location of the mobile node having determined the type based on a result of comparing the SMR values, wherein the location registration step includes: the mobile node being the mobile router (MR) and the SMR value being the predetermined value; If it is smaller than the value of, the Home Address (HoA) and the Local Temporary Address (RCoA) are sent to the Mobile Router Home Agent (HA_MR) as the binding update (BU), and the Local Temporary Address (RCoA) and the Link Temporary Address ( The LCoA) and the NEMO prefix are sent to the moving anchor point MAP as the binding update BU.
In addition, the second method of the present invention is a value obtained by dividing a session arrival frequency for a location registration target mobile node (hereinafter referred to as a "mobile node") by a movement frequency in a location registration method in a mobile network (Session-to- Mobility-Ratio: SMR value confirming step for confirming hereinafter " SMR value " An SMR value comparison step of comparing the SMR value with a predetermined value; A mobile node determination step of determining whether the mobile node which has confirmed the SMR value corresponds to a mobile router (MR) or a visited mobile node (VMN); And a location registration step of registering a location of the mobile node having determined the type based on a result of comparing the SMR values, wherein the location registration step includes: the mobile node being the mobile router (MR) and the SMR value being the predetermined value; Check if the value is greater than or equal to, send the link temporary address (LCoA) to the mobile router home agent (HA_MR) as the binding update (BU), and the local temporary address (RCoA), link temporary address (LCoA) and NEMO. The prefix is sent as a binding update BU to the moving anchor point MAP.
Further, the third method of the present invention is a value obtained by dividing a session arrival frequency for a location registration target mobile node (hereinafter referred to as a "mobile node") by a movement frequency in a location registration method in a mobile network (Session-to- Mobility-Ratio: SMR value confirming step for confirming hereinafter " SMR value " An SMR value comparison step of comparing the SMR value with a predetermined value; A mobile node determination step of determining whether the mobile node which has confirmed the SMR value corresponds to a mobile router (MR) or a visited mobile node (VMN); And a location registration step of registering a location of the mobile node having determined the type based on a result of comparing the SMR values, wherein the location registration step comprises: the mobile node is the visited mobile node (VMN), and the SMR value is the same. If it is smaller than the predetermined value, the home address (HoA) and the link temporary address (LCoA) are sent as a binding update (Binding Update) to the visiting mobile node home agent (HA_VMN), and the local temporary address (RCoA), link The temporary address (LCoA) is sent to the mobile anchor point (MAP) as a binding update.
Further, the fourth method of the present invention is a value obtained by dividing a session arrival frequency for a location registration target mobile node (hereinafter referred to as a "mobile node") by a movement frequency in a location registration method in a mobile network (Session-to- Mobility-Ratio: SMR value confirming step for confirming hereinafter " SMR value " An SMR value comparison step of comparing the SMR value with a predetermined value; A mobile node determination step of determining whether the mobile node which has confirmed the SMR value corresponds to a mobile router (MR) or a visited mobile node (VMN); And a location registration step of registering a location of the mobile node having determined the type based on a result of comparing the SMR values, wherein the location registration step comprises: the mobile node is the visited mobile node (VMN), and the SMR value is the same. If it is greater than or equal to the predetermined value, the home address (HoA) and the local temporary address (RCoA) are sent as a binding update (Binding Update) to the visiting mobile node home agent (HA_VMN), and the local temporary address (RCoA). And link temporary address (LCoA) are sent to mobile anchor point (MAP) as binding update.

Meanwhile, according to the fifth method of the present invention, in the packet forwarding method in a mobile network, a value obtained by dividing a session arrival frequency of a packet forwarding target mobile node (hereinafter referred to as a "mobile node") by a mobile frequency (Session-to- Mobility-Ratio: SMR value confirming step for confirming hereinafter " SMR value " An SMR value comparison step of comparing the SMR value with a predetermined value; A mobile node determination step of determining whether the mobile node which has confirmed the SMR value corresponds to a mobile router (MR) or a visited mobile node (VMN); And a packet forwarding step of delivering a packet to the mobile node that has determined the type based on a result of comparing the SMR values, wherein the packet forwarding step comprises: the mobile node being the mobile router MR, and the SMR value being the predetermined value. If it is less than the value of, the external correspondent node (CN) forwards the local fixed node home address (HoA_LFN) packet to the mobile router home agent (HA_MR) with the local fixed node home address (HoA_LFN) as the destination. Local fixed node home address (HoA LFN) packet forwarding step; View the local fixed node home address (HoA_LFN) packet and the binding cache of the mobile router home agent (HA_MR) to find the local temporary address (RCoA) of the corresponding mobile router (MR) to find the packet A mobile router local temporary address / local fixed node home address forwarding step of encapsulating the temporary address RCoA into a packet RCoA_MRIHoA_LFN and delivering it to the mobile anchor point MAP; The mobile anchor point MAP looks at the binding cache entry, finds the link temporary address LCoA of the corresponding mobile router MR, and finds the packet LCoA_MR I RCoA_MR I HoA_LFN. Delivering an "LCoA_MR I RCoA_MR I HoA_LFN" packet to encapsulate (LCoA) as a destination and deliver it to the corresponding mobile router (MR); And the corresponding mobile router (MR) decapsulates the packet (LCoA_MR I RCoA_MR I HoA_LFN) to obtain the original packet, and then transfers the local fixed node home address (HoA_LFN) packet to the local fixed node (LFN). Packet forwarding step.
In addition, the sixth method of the present invention is a packet forwarding method in a mobile network, wherein a session arrival frequency for a packet forwarding target mobile node (hereinafter referred to as a "mobile node") is divided by a movement frequency (Session-to- Mobility-Ratio: SMR value confirming step for confirming hereinafter " SMR value " An SMR value comparison step of comparing the SMR value with a predetermined value; A mobile node determination step of determining whether the mobile node which has confirmed the SMR value corresponds to a mobile router (MR) or a visited mobile node (VMN); And a packet forwarding step of delivering a packet to the mobile node that has determined the type based on a result of comparing the SMR values, wherein the packet forwarding step comprises: the mobile node being the mobile router MR, and the SMR value being the predetermined value. It is greater than or equal to, and it is confirmed that the mobile router MR registers the link temporary address LCoA in the mobile router home agent HA_MR, and the mobile router home agent HA_MR is an external corresponding node CN. Receiving a local fixed node home address (HoA LFN) packet from the local fixed node home address (HoA LFN) packet; The mobile router home agent (HA_MR) receiving the Local Fixed Node Home Address (HoA_LFN) packet finds the link temporary address (LCoA) of the mobile router (MR) in a binding cache and finds the corresponding packet. Encapsulating an address LCoA into a packet LCoA_MR I HoA_LFN and delivering the packet to the mobile router MR; And a packet forwarding step of the mobile router (MR) decapsulating the packet (LCoA_MR I HoA_LFN) and delivering the packet to a local fixed node (LFN).
In addition, the seventh method of the present invention is a packet forwarding method in a mobile network, wherein a session arrival frequency for a packet forwarding target node (hereinafter referred to as a "mobile node") is divided by a movement frequency (Session-to- Mobility-Ratio: SMR value confirming step for confirming hereinafter " SMR value " An SMR value comparison step of comparing the SMR value with a predetermined value; A mobile node determination step of determining whether the mobile node which has confirmed the SMR value corresponds to a mobile router (MR) or a visited mobile node (VMN); And a packet forwarding step of forwarding a packet to the mobile node that has determined the type based on a result of comparing the SMR values, wherein the packet forwarding step comprises: the mobile node is the visited mobile node (VMN), and the SMR value is the mobile node. It is confirmed that the case is smaller than a predetermined value, the mobile node (NVM) registers the link temporary address (LCoA) to its own mobile agent (HA) Home Mobile Node (HA_VMN), the external correspondent node (CN) Visited mobile node home address (HoA_VMN) packet to the home mobile node (HoA) of the visited mobile node (HoA) from the visited mobile node home agent (HA_VMN) (HoA_VMN) packet received from the visited mobile node home agent (HA_VMN) Receiving step; The mobile node home agent (HA_VMN) encapsulates the received mobile node home address (HoA_VMN) packet into a packet (LCoA_VMN I HoA_VMN) whose destination is the link temporary address (LCoA) of the visited mobile node (VMN). Transmitting the "LCoA_VMN I HoA_VMN" packet to the mobile router home agent (HA_MR); The mobile router home agent (HA_MR) recapsulates the packet (LCoA_VMN I HoA_VMN) by using a local temporary address (RCoA) or a link temporary address (LCoA) and delivers the packet to the mobile router (MR). It includes a packet forwarding step for delivering to the visited mobile node (VMN).
In addition, the eighth method of the present invention is a packet forwarding method in a mobile network, wherein a session arrival frequency for a packet forwarding target node (hereinafter referred to as a "mobile node") is divided by a movement frequency (Session-to- Mobility-Ratio: SMR value confirming step for confirming hereinafter " SMR value " An SMR value comparison step of comparing the SMR value with a predetermined value; A mobile node determination step of determining whether the mobile node which has confirmed the SMR value corresponds to a mobile router (MR) or a visited mobile node (VMN); And a packet forwarding step of forwarding a packet to the mobile node that has determined the type based on a result of comparing the SMR values, wherein the packet forwarding step comprises: the mobile node is the visited mobile node (VMN), and the SMR value is the mobile node. Check that the value is greater than or equal to a predetermined value, the visited mobile node home agent HA_VMN is a packet HoA_VMN transmitted from the external correspondent node CN to the home address HoA of the visited mobile node VMN as a destination. Receiving a home address (HoA) packet (HoA_VMN) of the visited mobile node (VMN) is received; The received visited mobile node (VMN) home address (HoA) packet (HoA_VMN) is a packet (RCoA_VMN I) whose destination mobile node (HA_VMN) is a local temporary address (RCoA) of the visited mobile node (VMN). Encapsulating (HoA_VMN) and delivering the “RCoA_VMN I HoA_VMN” packet to the mobile anchor point MAP; The mobile anchor point MAP sees the information stored in the binding cache, and the link temporary address LCoA of the visited mobile node VMN corresponding to the local temporary address RCoA of the visited mobile node VMN. After encapsulating the packet, the packet is created by using "LCoA_VMN I RCoA_VMN I HoA_VMN" packet, and then encapsulated one more time using the link temporary address (LCoA) of the mobile router (MR) to "LCoA_MR I LCoA_VMN I RCoA_VMN" A packet “LCoA_MR I LCoA_VMN I RCoA_VMN I HoA_VMN” delivering an I HoA_VMN ”packet and delivering the packet“ LCoA_MR I LCoA_VMN I RCoA_VMN I HoA_VMN ”to the mobile router (MR); And the mobile router (MR) decapsulates the packet (LCoA_MR I LCoA_VMN I RCoA_VMN I HoA_VMN) to transfer the decapsulated packet (LCoA_VMN I RCoA_VMN I HoA_VMN) to the visited mobile node (VMN). And transmitting a packet (LCoA_VMN I RCoA_VMN I HoA_VMN) to be transmitted.

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The above objects, features and advantages will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, whereby those skilled in the art may easily implement the technical idea of the present invention. There will be. In addition, in describing the present invention, when it is determined that the detailed description of the known technology related to the present invention may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a diagram illustrating an embodiment of a location registration process in Mobile IPv6 proposed by the existing IETF.

In the figure, "CN" is a Corresponding Node 101, "HA" is a Home Agent 102, "AR" is an Access Router 103, 104, and "MN". Is a mobile node 105, "HoA" is a home address 106, and "CoA" is a care of address 107, respectively.

The corresponding node (CN) 101 represents all the nodes that are in communication with the mobile node (MN) 105, the home agent (HA) 102 is a mobile node (MN) of the router (Router) in the home network It has a registration information of 105 and represents a router that drives the datagram to the current location of the mobile node (MN) 105 in the external network, and the access routers (AR) 103, 104 are serviced by the mobile host. Represents a router, and the mobile node (MN) 105 represents a host or a router that changes its network connection location, respectively.

In Mobile IP, home address (HoA) 106 is an address used to uniquely distinguish each mobile node (MN) 105, and a temporary address (CoA) 107 is a mobile node (MN) 105 ) Is an address containing location information.

On the other hand, the mobile node (MN) 105 in the subnet managed by the old access router (Old AR) 103 moves to the subnet managed by the new access router (New AR) 104. The mobile node (MN) 105 receives a "Router Advertisement (RA)" message from the new AR 104, and configures a new temporary address (CoA) 107. This is notified by sending a Binding Update (BU) to the Home Agent (HA) 102. That is, the binding update (BU) is used by the mobile node (MN) 105 to inform its home agent (HA) 102 and the corresponding node (CN) 101 of its temporary address (CoA) 107. do.

The home agent (HA) 102 receives a binding update (BU) sent by the mobile node (MN) 105 and stores an entry "HoA: CoA" in its binding cache.

When an external corresponding node (CN) 101 wishes to communicate with the mobile node (MN) 105, the corresponding node (CN) 101 first uses the home address (HoA) 106 to move the mobile node (MN). Packet is sent to the home agent (HA) 102. The home agent (HA) 102 that receives it looks at the binding cache and finds out which temporary address (CoA) 107 the home address (Ho) 106 corresponds to. CoA is encapsulated into a new IP packet destined for the destination 107 and sent to the mobile node (MN) 105. The mobile node (MN) 105 receives the original packet sent to its home address (HoA) 106 and decapsulates the packet and processes the received packet. At this time, since the mobile node (MN) 105 knows the address of the corresponding node (CN) 101, the mobile node (MN) 105 communicates directly without passing through the home agent (HA) 102, but the corresponding node (CN) 101 does not communicate. It must always go through the home agent (HA) 102 to communicate with the mobile node (MN) 105. That is, even when the corresponding node (CN) 101 and the mobile node (MN) 105 are very close, the packet transmitted from the corresponding node (CN) 101 to the mobile node (MN) 105 is always a home agent (HA). It must be transmitted to the mobile node (MN) 105 via 102). This problem is called a "Triangular Routing Problem", and the problem is solved by the mobile node (MN) 105 sending its temporary address (CoA) 107 directly to the corresponding node (CN) 101. Can be. This is called Route Optimization (RO). Currently, Mobile IP has two specifications, "MIPv4" for Internet version 4 and "MIPv6" for Version 6. In "MIPv6", the RO optimization process It is included as a default function.

2 is a diagram illustrating an embodiment of a general hierarchical mobile IP (HMIP).

In Mobile IP, whenever a mobile node (MN) 203 moves through a subnet, the mobile node (MN) 203 moves to the home agent (HA) via the Internet (201). Since a number of mobile nodes (MN) 203 is required to register with 202, the load on the core internet becomes large. In order to solve this problem, Hierarchical Mobile IP (HMIP) has been proposed.

The hierarchical mobile IP (HMIP) solves this problem by handling the local and global movement of the mobile node (MN) 203 differently.

On the other hand, hierarchical mobile IP (HMIP) introduces agents (Mobility Anchor Points (MAP) (211, 221) as an anchor point (Anchor Point) for handling local (local) movement. When the mobile node (MN) 203 arrives at the area of the new mobile anchor point (MAP) 211, 221, it generates two temporary addresses (CoA) 214, 215, one corresponding mobile anchor point domain. Regional CoA (214,231) containing information about (MAP Domain) 210, 220, and the other is a subnet managed by a corresponding access router (AR) 212,213. On Link CoA (LCoA) 215 that contains information about (Subnet). Create two temporary addresses (CoA) (214, 215), a local temporary address (RCoA) (214, 231) and a link temporary address (LCoA: On link CoA) (215), then create a "RCoA: LCoA Pair is registered with the corresponding mobile anchor point (MAP) 211, 221, and a pair of "HoA: RCoA" is registered with the corresponding home agent (HA) 202. By managing the location information in such a hierarchy, if the mobile node (MN) 203 moves to another subnet in the corresponding mobile anchor point domain (MAP domain) 210, 220, the local temporary address (RCoA) Since 214 does not change and only the link temporary address (LCoA) 215 is changed, the mobile node (MN) 203 moves only the local temporary address (RCoA) 214 and the newly obtained link temporary address (LCoA) 215. By registering in the anchor point (MAP) (211, 221) it is possible to complete the location registration. As a result, when moving in the mobile anchor point domain (MAP Domain) (210, 220) it is possible to reduce the load on the network because the binding agent (BU) does not need to be updated to the home agent (HA) 202 via the Internet 201 Will be.

3 is a diagram illustrating an exemplary operation of a general "NEMO basic support protocol (Protocol)".

In the figure, "VMN" is a visiting mobile node 301, "LFN" is a local fixed node 302, "MR" is a mobile router 303, " VAN "means a vehicle area network 304, respectively.

The visited mobile node (VMN) 301 is a mobile node (MN) that originally did not belong to the vehicle region network (VAN) 304 but temporarily belonged to the vehicle region network (VAN) 304 as a result of the movement. Node (LFN) 302 refers to a mobile node (MN) that is connected to a mobile router (MR) 303 and does not change its connection point with the mobile router (MR) 303 in a vehicle area network (VAN) 304. .

When the vehicle area network (VAN) 304 moves from a home network to which a vehicle network (VAN) 304 was originally registered to a new subnet, the mobile router (MR) 303 transfers the newly obtained temporary address (CoA) to its home. It registers with the mobile router home agent (HA_MR) 304 which is an agent (HA).

The Local Fixed Node (LFN) 302 has limited communication capability and therefore cannot send a binding update message (BU Message) directly. Instead, since the mobile router (MR) 303 sends the binding update (BU) to the mobile router home agent (HA_MR) 304 on behalf of the vehicle area network (VAN) 304, the binding update message (BU message) is included. The network prefix of the mobile router (MR) 303 is contained along with the temporary address (CoA) obtained from the access router (AR) 305, 306.

Sending a network prefix of the mobile router (MR) 303 is set as an option, and if not, an administrator adds prefix information directly to the home agent HA. If the visited mobile node (VMN) 301 enters the vehicle area network (VAN) 304 from the outside, the visited mobile node (VMN) 301 is a " RA (Router Advertisement) of the mobile router (MR) 303. Receives the message " " and generates a temporary address (CoA) and registers it with its home address (HoA) to its own home agent (HA), a mobile node home agent (HA_VMN).

If an external correspondent node (CN) 308 intends to communicate with the visited mobile node (VMN) 301, the corresponding node (CN) 308 is the home of the visited mobile node (VMN) 301. A packet destined for the address HoA is sent, which is routed to the HA_VMN 307, where the temporary address CoA of the VMA 301 is sent. Encapsulation into a packet destined for the destination. The packet arrives at the mobile router home agent (HA_MR) 304, where the mobile router home agent (HA_MR) 304 has a mobile router (MR) based on the binding information held in the binding cache. It is encapsulated once again into a packet having a temporary address (CoA) of 303 as a destination. The packet is routed to the mobile router (MR) 303, and the mobile router (MR) 303 decapsulates a packet to which it is a destination, and then visits the mobile node (VMN). To (301).

When the communication is performed by the above process, the packet transmission delay time increases because a plurality of home agents (HA) must be passed for communication, and the packet size also increases due to encapsulation of the packet. In NEMO, this is called the "Pinball routing problem" and various path optimization (RO) techniques have been proposed to solve this problem.

4 is a diagram illustrating an embodiment of a method for registering a location of a mobile router (MR) for adaptive path optimization in a mobile network according to the present invention.

In the present invention, an adaptive path optimization method for a mobile network is performed based on the "NEMO basic support protocol."

First, a location registration method for adaptive path optimization in a mobile network according to the present invention can be divided into a case of a mobile router (MR) and a visited mobile node (VMN).

In the present invention, location registration is performed by considering the user's session frequency as well as the user's moving speed. To this end, a value called "Session-to-mobility-ratio" is used. The "SMR" value is defined as a value obtained by dividing a session arrival frequency by a moving frequency. In other words, a large SMR value means that the node maintains the session for a long time without much movement. In this case, the transmission rate of the session becomes more important than the movement speed of the node. Therefore, in order to reduce the total cost of MN communication, it is more necessary to reduce the packet transmission cost than the location registration cost. On the other hand, a small SMR value means that the node moves rapidly and does not communicate very much. To reduce the communication cost of the mobile node (MN), it is more effective to reduce the location registration cost.

First, the location registration method of the mobile router (MR) is as follows.

If the SMR value is greater than or equal to a threshold value of "t1", it is more efficient to reduce the packet transmission cost. Therefore, a mobile router (MR) that receives a Router Advertisement (RA) message from the Mobile Anchor Point (MAP) 402 is used. 401 first registers its Local Temporary Address (RCoA), Link Temporary Address (LCoA), and NEMO Prefix (MAP) to the Mobile Anchor Point (MAP) (411), and links to its NEMO Prefix (Prefix). The temporary address LCoA is registered with the mobile router home agent HA_MR, which is its home agent HA (412). By doing so, the mobile router (MR) 401 can skip the mobile anchor point (MAP) 402 when communicating with the external correspondent node (CN) 404, thereby reducing the packet forwarding cost. Whenever the link temporary address (LCoA) is changed, the location registration cost increases because the mobile router home agent (HA_MR) 403 needs to be informed. However, since the packet forwarding cost is a more important factor in the overall cost than the location registration cost, the overall cost is reduced. Note that the NEMO, along with the local temporary address (RCoA) and the link temporary address (LCoA) of the mobile router (MR) 401 when sending a bounding update (BU) message to the mobile anchor point (MAP) 402, is noted here. The prefix is also sent together (411). This information includes a packet destined for the local temporary address (RCoA) of the visiting mobile node (VMN) 405 and the local temporary address (RCoA) of the visiting mobile node (VMN) 405 as well as the link temporary address (LCoA). Packet is used to optimize the route without going through the mobile router home agent (MR_HA) (403). A detailed description of this process will be described in more detail along with the packet transmission process for the VMN 405.

5 is a diagram illustrating another embodiment of a method for registering a location of a mobile router (MR) for adaptive path optimization in a mobile network according to the present invention.

In contrast to the case of FIG. 4, when the SMR value is smaller than the threshold value "t1", it is efficient to reduce the location registration cost. Therefore, the mobile router (MR) that receives the RA (Router Advertisement) message from the mobile anchor point (MAP) 504 The 501 registers the NEMO prefix, the local temporary address (RCoA), and the link temporary address (LCoA) to the mobile anchor point (MAP) 504 (510), and the mobile router (MR) 501 receives the NEMO. The prefix and the local temporary address (RCoA) are registered in the mobile router home agent (HA_MR) 502 (511). In this way, when communicating with the correspondent node (CN) 503, it is always necessary to send and receive packets through the mobile anchor point (MAP) 504 to increase the packet forwarding cost, but by registering a local temporary address (RCoA) When the mobile router (MR) 501 moves in the mobile anchor point (MAP) 504 domain, the location registration cost can be reduced because the mobile router (MR) 501 does not need to register the location with the home agent HA. Overall, when the SMR value is small, the total cost is reduced because the location registration cost is a big part of the total cost.

FIG. 6 is a diagram illustrating an embodiment of a location registration method of a visited mobile node (VMN) for adaptive path optimization in a mobile network according to the present invention.

In the case of the visited mobile node (VMN) 601, the mobile station (MR) 602 shows a different trend from the location registration.

First, when the SMR value is greater than or equal to a threshold value of "t2", the VMN 601 receiving a Router Advertisement (RA) message from the mobile router (MR) 602 is a mobile anchor point. Register a Local Temporary Address (RCoA) and a Link Temporary Address (LCoA) of the Visit Mobile Node (VMN) 601 at (MAP) 603 (611), and the Home Mobile Node Home Agent (HA_VMN) 604 at Home The address HoA and the local temporary address RCoA are registered (612).

When the SMR value is large, it is beneficial to reduce the packet transmission cost.By registering the local temporary address (RCoA) with the visiting mobile node home agent (HA_VMN) 604, the packet moves without passing through the mobile router home agent (HA_MR) 605. Since it directly goes to the anchor point (MAP) 603, it is possible to reduce the packet transmission cost. Although the Local Temporary Address (RCoA) is changed per Mobile Anchor Point (MAP) 603 domain, the location registration cost increases but the overall cost decreases.

7 is a diagram illustrating another embodiment of a location registration method of a visited mobile node (VMN) for adaptive path optimization in a mobile network according to the present invention.

FIG. 7 shows that a mobile node (VMN) 701 receiving a Router Advertisement (RA) message from a mobile router (MR) 702 when the SMR value is smaller than the threshold value "t2" is a mobile anchor point (MAP) 703. The local temporary address (RCoA) and the link temporary address (LCoA) of the visiting mobile node (VMN) 701 are registered (710), and the home address (HoA) and the home mobile address (HA_VMN) (704) The link temporary address (LCoA) is registered (711). In this case, even if the mobile node (VMN) 701 moves with the mobile router (MR) 702, the location registration is performed only once because the link temporary address (LCoA) of the mobile node (VMN) 701 does not change. However, if the corresponding node (CN) 705 communicates with the visited mobile node (VMN) 701, the visited mobile node home agent (HA_VMN) 704, the mobile router home agent (HA_MR) 706, mobile Packet transmission because it must pass through anchor point (MAP) 703 (for example, when mobile router (MR) 702 has registered a local temporary address (RCoA) to mobile router home agent (HA_MR) 706)) The cost increases. However, a large SMR value means that the node moves quickly, so the gain from location registration cost is greater and the overall cost is reduced.

The location registration method for adaptive path optimization in a mobile network according to the present invention is summarized as follows.

First, in the case of the mobile router MR, if the SMR value is smaller than the threshold value "t1", the mobile router home agent (HoA) and the local temporary address (RCoA) are used as binding updates (BU). HA_MR) and the Local Temporal Address (RCoA), Link Temporary Address (LCoA), and NEMO Prefix as Binding Update (BU) to Mobile Anchor Point (MAP).

If the SMR value is greater than or equal to the threshold value "t1", the link temporary address (LCoA) is sent as a binding update (BU) to the mobile router home agent (HA_MR), and the local temporary address (RCoA) and the link temporary address are sent. The LCoA and the NEMO prefix are sent to the moving anchor point MAP as the binding update BU.

In the case of the VMN, if the SMR value is smaller than the threshold value "t2", the MOV home agent is set to the home address (HoA) and the link temporary address (LCoA) as the binding update. (HA_VMN) and local temporary address (RCoA) and link temporary address (LCoA) as binding update (Binding Update) to mobile anchor point (MAP).

If the SMR value is greater than or equal to the threshold value "t2", the home address (HoA) and the local temporary address (RCoA) are sent as a binding update to the visiting mobile node home agent (HA_VMN), and the local temporary The address (RCoA) and link temporary address (LCoA) are sent to the mobile anchor point (MAP) as a binding update.

8 is a diagram illustrating a method of delivering a packet to a mobile router (MR) for adaptive path optimization in a mobile network according to the present invention.

The packet forwarding method according to the present invention is performed according to the location registration method described above. This is largely divided into a case of delivering a packet to a mobile router (MR) and a case of delivering a packet to a visited mobile node (VMN). The method will also be different.

First, a method of delivering a packet to the mobile router (MR) 802 is as follows.

If the SMR is smaller than the threshold "t1", the mobile router (MR) 802 may have registered a local temporary address (RCoA) with the mobile router home agent (HA_MR) 805 in accordance with the above-described technique.

When the external correspondent node 807 communicates with the local fixed node (LFN) 801 fixed to the mobile router (MR) 802, the local fixed node home address (HoA_LFN) is used as a destination. When the packet is sent, the local fixed node home address (HoA_LFN) packet is forwarded to the mobile router home agent (HA_MR) 805 by routing (811).

The Mobile Router Home Agent (HA_MR) 805 looks at the delivered Local Fixed Node Home Address (Ho_LFN) packet and its binding cache to determine the Local Temporary Address (RCoA) of the Mobile Router (MR) 802. The packet is encapsulated into a packet (RCoA_MRIHoA_LFN) destined for a local temporary address (RCoA).

Since the local temporary address (RCoA) was generated based on the location of the mobile anchor point (MAP) 804, this packet ((RCoA_MRIHoA_LFN) is the mobile anchor point (MAP) where the mobile router (MR) 802 is currently located. Routed to 804 (812).

The mobile anchor point (MAP) 804 also looks at the binding cache entry, finds the link temporary address (LCoA) of the corresponding mobile router (MR), and returns the packet to the link temporary address (LCoA). Encapsulation of I RCoA_MR I HoA_LFN). This packet (LCoA_MR I RCoA_MR I HoA_LFN) is delivered to the mobile router (MR) 802 (813) and the mobile router (MR) 802 decapsulates it twice to obtain the original packet The fixed node home address (HoA_LFN) packet is delivered to the local fixed node (LFN) (814).

9 is a diagram illustrating another embodiment of a method for delivering a packet to a mobile router (MR) for adaptive path optimization in a mobile network according to the present invention.

If the SMR is greater than or equal to the threshold value "t1", the mobile router (MR) 902 registers the link temporary address (LCoA) with the mobile router home agent (HA_MR) 905.

Therefore, the mobile router home agent (HA_MR) 905 receives a local fixed node home address (HoA_LFN) packet from the corresponding node (CN) 907 (911), and receives a local fixed node home address (HoA_LFN) packet. The home agent (HA_MR) 905 finds the link temporary address (LCoA) of the mobile router (MR) 902 in the binding cache and sends the packet to the link temporary address (LCoA) as a destination (LCoA_MR I). Encapsulation (HoA_LFN) to the mobile router (MR) 902 (912). Since the link temporary address (LCoA) contains the location information of the access router (AR) 903 to which the mobile router (MR) 902 currently has association, this packet (LCoA_MR I HoA_LFN) is accessed. Routing is performed to the router (AR) 903.

The mobile router (MR) 902 decapsulates this packet (LCoA_MR I HoA_LFN) and forwards it to the local fixed node (LFN) 901 (913).

10 is a diagram illustrating a method of delivering a packet to a visited mobile node (VMN) for adaptive path optimization in a mobile network according to the present invention.

As described above, the packet forwarding process in the adaptive path optimization method according to the present invention is performed according to the location registration method described above, and the method of forwarding the packet to the mobile router MR in FIGS. 8 and 9. I looked at it.

Next, a method of delivering a packet to a visited mobile node (VMN) is as follows.

If the SMR is less than the threshold "t2", the proposed mobile node (VMN) 1001 uses the proposed method to assign the link temporary address (LCoA) to its own home agent (HA) HA_VMN (1006). Register at). Therefore, the destination mobile node home address (HoA_VMN) packet is the destination mobile node home agent (HA_VMN) 1006 from the external correspondent node (CN) 1007 to the home address (HoA) of the destination mobile node (VMN) 1001. (1011), the transmitted Mobile Node Home Address (HoA_VMN) packet is transmitted by the Mobile Mobile Node Home Agent (HA_VMN) 1106, and the destination packet is the link temporary address (LCoA) of the Mobile Mobile Node (VMN). Encapsulated into (LCoA_VMN I HoA_VMN), and the link temporary address (LCoA) of the visited mobile node (VMN) 1001 is generated with the prefix information received from the mobile router (MR) 1002. This packet (LCoA_VMN I HoA_VMN) is transmitted to the mobile router home agent (HA_MR) 1005 (1012).

The mobile router home agent (HA_MR) 1005 stores a link temporary address (LCoA) or a local temporary address (RCoA) of the mobile router (MR) 1002 depending on whether the SMR is larger than or smaller than "t1".

First, if the SMR is smaller than "t1", the Mobile Router Home Agent (HA_MR) 1005 stores the Local Temporary Address (RCoA) of the Mobile Router (MR) 1002 by the proposed scheme, and the corresponding packet (LCoA_VMN I). HoA_VMN encapsulates the local temporary address (RCoA) of the mobile router (MR) and delivers the packet (RCoA_MR I LCoA_VMN I HoA_VMN) to the mobile anchor point (MAP) 1004 (1021), and the mobile anchor point (MR). MAP) 1004 encapsulates this packet (RCoA_MR I LCoA_VMN I HoA_VMN) once again into a packet destined for the link temporary address (LCoA) of the mobile router (MR) 1002 (LCoA_MR I RCoA_MR I LCoA_VMN I HoA_VMN). Encapsulation is transmitted to the mobile router (MR) 1002 (1022). The mobile router (MR) 1002 receives this packet (LCoA_MR I RCoA_MR I LCoA_VMN I HoA_VMN), performs decapsulation twice, and forwards the packet to the visited mobile node (VMN) 1001 (1040).

On the other hand, if the SMR is greater than or equal to "t1", the mobile router home agent (HA_MR) 1005 stores the temporary link (LCoA) of the mobile router (MR) 1002 according to the proposed method, and thus moves the visit. A packet (LCoA_VMN I HoA_VMN) whose destination is the link temporary address (LCoA) of the visiting mobile node (VMoA) by the node home agent (HA_VMN) 1106 is a packet (LCoA_MR I LCoA_VMN I destined for the link temporary address (LCoA). Encapsulated into HoA_VMN and delivered to mobile router (MR) 1002 (1030), and mobile router (MR) 1002 decapsulates this packet (LCoA_MR I LCoA_VMN I HoA_VMN) to move the visit. Forward to node (VMN) 1001 (1040).

11 is a diagram illustrating another embodiment of a method for delivering a packet to a Visited Mobile Node (VMN) for adaptive path optimization in a mobile network according to the present invention.

If the SMR is greater than or equal to "t2", the proposed scheme uses the local temporary address (RCoA) of the Visited Mobile Node (VMN) 1101 as its Home Agent (HA), the HA_VMN. Register at). Accordingly, the packet HoA_VMN transmitted from the external correspondent node CN 1107 as the destination of the home address HoA of the visited mobile node VMN 1101 is transferred to the visited mobile node home agent HA_VMN (1111). ), The forwarded packet HoA_VMN is encapsulated (HAoVMN) 1106 into a packet RCoA_VMN I HoA_VMN whose destination is the local temporary address (RCoA) of the visiting mobile node (VMN) 1101. This packet (RCoA_VMN I HoA_VMN) is a mobile anchor because the local temporary address (RCoA) of the visiting mobile node (VMN) 1101 is an address generated based on the location of the mobile anchor point (MAP) 1104. Routed to point MAP 1104 (1112).

The mobile anchor point (MAP) 1104 views the information stored in the binding cache, and the mobile mobile node (VMN) 1101 corresponding to the local temporary address (RCoA) of the mobile mobile node (VMN) 1101. Find the Link Temporary Address (LCoA). However, if the packet is encapsulated using the link temporary address (LCoA) of the visited mobile node (VMN) 1101, the link temporary address (LCoA) is a prefix of the mobile router (MR) 1102. This packet, generated from SBS, must go through the Mobile Router Home Agent (HA_MR) 1105, which is the Home Agent (HA) of the Mobile Router (MR) 1102. In order to optimize the route, when the mobile router (MR) 1102 registers to the prefix of the mobile router (MR) 1102 when the mobile router (MR) 1102 registers its position with the mobile anchor point (MAP) 1104, the mobile anchor point is registered. (MAP) 1104 may also find that the link temporary address (LCoA) of the Visited Mobile Node (VMN) 1101 corresponds to the prefix of the Mobile Router (MR) 1102. That is, the relationship of "VMN_RCoA-> MN_LCoA-> NEMO prefix-> MR_RCoA-> MR_LCoA" is used.

Accordingly, the mobile anchor point (MAP) 1104 encapsulates the packet with the link temporary address (LCoA) of the visiting mobile node (VMN) 1101 (LCoA_VMN I RCoA_VMN I HoA_VMN) and then moves the mobile router (MR) 1102. Encapsulation (LCoA_MR I LCoA_VMN I RCoA_VMN I HoA_VMN) once more using the Link Temporary Address (LCoA) of Delivered 1113.

The mobile router (MR) 1102 decapsulates the packet (LCoA_MR I LCoA_VMN I RCoA_VMN I HoA_VMN) once and decapsulates the decapsulated packet (LCoA_VMN I RCoA_VMN I HoA_VMN). And transmits to 1101 (1114).

The figure shows that by performing this process, path optimization is performed to skip the mobile router home agent (HA_MR) 1105.

As described above, the method of the present invention may be implemented as a program and stored in a recording medium (CD-ROM, RAM, ROM, floppy disk, hard disk, magneto-optical disk, etc.) in a computer-readable form. Since this process can be easily implemented by those skilled in the art will not be described in more detail.

The present invention described above is capable of various substitutions, modifications, and changes without departing from the technical spirit of the present invention for those skilled in the art to which the present invention pertains. It is not limited by the drawings.

As described above, in order to solve the "Pinball routing problem" of "NEMO basic support protocol" using HMIPv6 architecture, the visited mobile node VMN and the mobile router MR each have their own SMR values. According to the adaptive location registration, the total communication cost combined with the location registration cost and the packet transmission cost can be reduced, and the effect of effectively combining the two techniques without major modifications to the "NEMO" and HMIPv6 specifications. There is.

Claims (21)

In the location registration method in a mobile network, Check the SMR value that checks the value obtained by dividing the session arrival frequency for the location registration target mobile node (hereinafter referred to as "mobile node") by the movement frequency (hereinafter referred to as "SMR value"). step; An SMR value comparison step of comparing the SMR value with a predetermined value; A mobile node determination step of determining whether the mobile node which has confirmed the SMR value corresponds to a mobile router (MR) or a visited mobile node (VMN); And And a location registration step of registering a location of the mobile node having determined the type based on the result of comparing the SMR values, The location registration step, It is confirmed that the mobile node is the mobile router (MR) and the SMR value is smaller than the predetermined value, and the home router (HoA) and the local temporary address (RCoA) are binding updates (BU). SMR in a mobile network, characterized in that it is sent to an agent HA_MR and sends a local temporary address (RCoA), a link temporary address (LCoA) and a NEMO prefix as a binding update (BU) to a mobile anchor point (MAP). Location registration method using. In the location registration method in a mobile network, Check the SMR value that checks the value obtained by dividing the session arrival frequency for the location registration target mobile node (hereinafter referred to as "mobile node") by the movement frequency (hereinafter referred to as "SMR value"). step; An SMR value comparison step of comparing the SMR value with a predetermined value; A mobile node determination step of determining whether the mobile node which has confirmed the SMR value corresponds to a mobile router (MR) or a visited mobile node (VMN); And And a location registration step of registering a location of the mobile node having determined the type based on the result of comparing the SMR values, The location registration step, It is confirmed that the mobile node is the mobile router MR and the SMR value is greater than or equal to the predetermined value, and the mobile router home agent HA_MR uses the link temporary address LCoA as the binding update BU. Location registration using SMR in a mobile network, characterized in that it sends a local temporary address (RCoA), a link temporary address (LCoA), and a NEMO prefix as a binding update (BU) to a mobile anchor point (MAP). Way. In the location registration method in a mobile network, Check the SMR value that checks the value obtained by dividing the session arrival frequency for the location registration target mobile node (hereinafter referred to as "mobile node") by the movement frequency (hereinafter referred to as "SMR value"). step; An SMR value comparison step of comparing the SMR value with a predetermined value; A mobile node determination step of determining whether the mobile node which has confirmed the SMR value corresponds to a mobile router (MR) or a visited mobile node (VMN); And And a location registration step of registering a location of the mobile node having determined the type based on the result of comparing the SMR values, The location registration step, When the mobile node is the visited mobile node (VMN) and the SMR value is smaller than the predetermined value, the mobile node visits the home address (HoA) and the link temporary address (LCoA) as a binding update. SMR is used in the mobile network, which is sent to the mobile node home agent (HA_VMN) and the local temporary address (RCoA) and the link temporary address (LCoA) are sent to the mobile anchor point (MAP) as a binding update. How to register your location. In the location registration method in a mobile network, Check the SMR value that checks the value obtained by dividing the session arrival frequency for the location registration target mobile node (hereinafter referred to as "mobile node") by the movement frequency (hereinafter referred to as "SMR value"). step; An SMR value comparison step of comparing the SMR value with a predetermined value; A mobile node determination step of determining whether the mobile node which has confirmed the SMR value corresponds to a mobile router (MR) or a visited mobile node (VMN); And And a location registration step of registering a location of the mobile node having determined the type based on the result of comparing the SMR values, The location registration step, It is confirmed that the mobile node is the visited mobile node (VMN) and the SMR value is greater than or equal to the predetermined value, and the home address HoA and the local temporary address RCoA are bound to the binding update. SMR in the mobile network, which is sent to the mobile node home agent (HA_VMN) and the local temporary address (RCoA) and the link temporary address (LCoA) to the mobile anchor point (MAP) as a binding update. Location registration method using. The method according to any one of claims 1 to 4, The SMR value comparison step, If the SMR value is less than the predetermined value, the location registration cost is reduced; if the SMR value is greater than or equal to the predetermined value, the packet transmission cost is reduced; delete delete delete delete In the packet forwarding method in a mobile network, SMR value confirmation that checks the session arrival frequency for the packet forwarding mobile node (hereinafter referred to as "mobile node") divided by the movement frequency (Session-to-Mobility-Ratio: hereinafter referred to as "SMR value") step; An SMR value comparison step of comparing the SMR value with a predetermined value; A mobile node determination step of determining whether the mobile node which has confirmed the SMR value corresponds to a mobile router (MR) or a visited mobile node (VMN); And And a packet forwarding step of delivering a packet to the mobile node that has determined the type based on the result of comparing the SMR values, The packet forwarding step, It is confirmed that the mobile node is the mobile router (MR) and the SMR value is smaller than the predetermined value, and the corresponding node (CN) outside is fixed to the local fixed node home address (HoA_LFN) as a destination. A local fixed node home address (HoA_LFN) packet forwarding step for forwarding a node home address (HoA_LFN) packet to a mobile router home agent (HA_MR); View the local fixed node home address (HoA_LFN) packet and the binding cache of the mobile router home agent (HA_MR) to find the local temporary address (RCoA) of the corresponding mobile router (MR) to find the packet A mobile router local temporary address / local fixed node home address forwarding step of encapsulating the temporary address RCoA into a packet RCoA_MRIHoA_LFN and delivering it to the mobile anchor point MAP; The mobile anchor point MAP looks at the binding cache entry, finds the link temporary address LCoA of the corresponding mobile router MR, and finds the packet LCoA_MR I RCoA_MR I HoA_LFN. Delivering an "LCoA_MR I RCoA_MR I HoA_LFN" packet to encapsulate (LCoA) as a destination and deliver it to the corresponding mobile router (MR); And The corresponding mobile router (MR) decapsulates the packet (LCoA_MR I RCoA_MR I HoA_LFN) to obtain the original packet and then forwards the local fixed node home address (HoA_LFN) packet to the local fixed node (LFN). Packet forwarding phase Packet forwarding method using SMR in a mobile network comprising a. The method of claim 10, The mobile router (MR), And a local temporary address (RCoA) registered in the mobile router home agent (HA_MR). In the packet forwarding method in a mobile network, SMR value confirmation that checks the session arrival frequency for the packet forwarding mobile node (hereinafter referred to as "mobile node") divided by the movement frequency (Session-to-Mobility-Ratio: hereinafter referred to as "SMR value") step; An SMR value comparison step of comparing the SMR value with a predetermined value; A mobile node determination step of determining whether the mobile node which has confirmed the SMR value corresponds to a mobile router (MR) or a visited mobile node (VMN); And And a packet forwarding step of delivering a packet to the mobile node that has determined the type based on the result of comparing the SMR values, The packet forwarding step, The mobile node is the mobile router MR, the SMR value is greater than or equal to the predetermined value, and the mobile router MR registers a link temporary address LCoA with the mobile router home agent HA_MR. Checking and receiving a local fixed node home address (HoA_LFN) packet from which a mobile router home agent (HA_MR) receives a local fixed node home address (HoA_LFN) packet from an external corresponding node (CN); The mobile router home agent (HA_MR) receiving the Local Fixed Node Home Address (HoA_LFN) packet finds the link temporary address (LCoA) of the mobile router (MR) in a binding cache and finds the corresponding packet. Encapsulating an address LCoA into a packet LCoA_MR I HoA_LFN and delivering the packet to the mobile router MR; And A packet forwarding step in which the mobile router (MR) decapsulates the packet (LCoA_MR I HoA_LFN) and delivers it to a local fixed node (LFN). Packet forwarding method using SMR in a mobile network comprising a. The method of claim 12, The link temporary address (LCoA), The mobile router (MR) contains the location information of the access router (AR) that currently has an association (Association), The packet transmission method using SMR in a mobile network, characterized in that the packet (LCoA_MR I HoA_LFN) is routed to the access router (AR). In the packet forwarding method in a mobile network, SMR value confirmation that checks the session arrival frequency for the packet forwarding mobile node (hereinafter referred to as "mobile node") divided by the movement frequency (Session-to-Mobility-Ratio: hereinafter referred to as "SMR value") step; An SMR value comparison step of comparing the SMR value with a predetermined value; A mobile node determination step of determining whether the mobile node which has confirmed the SMR value corresponds to a mobile router (MR) or a visited mobile node (VMN); And And a packet forwarding step of delivering a packet to the mobile node that has determined the type based on the result of comparing the SMR values, The packet forwarding step, Check that the mobile node is the visited mobile node (VMN) and the SMR value is smaller than the predetermined value, and the visited mobile node (VMN) sets the link temporary address (LCoA) to its home agent (HA). The mobile station registers an HA_VMN, and transfers a HOA_VMN packet from the external correspondent node CN to the home address HoA of the VMN. Receiving a visiting mobile node home address (HoA_VMN) packet received from a node home agent (HA_VMN); The mobile node home agent (HA_VMN) encapsulates the received mobile node home address (HoA_VMN) packet into a packet (LCoA_VMN I HoA_VMN) whose destination is the link temporary address (LCoA) of the visited mobile node (VMN). Transmitting the "LCoA_VMN I HoA_VMN" packet to the mobile router home agent (HA_MR); The mobile router home agent (HA_MR) recapsulates the packet (LCoA_VMN I HoA_VMN) by using a local temporary address (RCoA) or a link temporary address (LCoA) and delivers the packet to the mobile router (MR). Packet forwarding step delivered to VMN Packet forwarding method using SMR in a mobile network comprising a. The method of claim 14, The link temporary address (LCoA) of the visited mobile node (VMN), Packet transmission method using SMR in a mobile network, characterized in that generated with the prefix (Prefix) information received from the mobile router (MR). The method of claim 14, The mobile router home agent (HA_MR), A method for forwarding packets using SMR in a mobile network, wherein the link temporary address (LCoA) or the local temporary address (RCoA) of the mobile router (MR) is stored according to whether the SMR value is larger or smaller than the predetermined value. . The method of claim 16, If the SMR value is smaller than the predetermined value, The local temporary address (RCoA) of the mobile router (MR) is stored in the mobile router home agent (HA_MR), Encapsulate the packet (LCoA_VMN I HoA_VMN) to a local temporary address (RCoA) of the mobile router (MR) to transfer the packet (RCoA_MR I LCoA_VMN I HoA_VMN) to a mobile anchor point (MAP), and the mobile anchor point (MAP). The point MAP is once again encapsulated into a packet LCoA_MR I RCoA_MR I LCoA_VMN I HoA_VMN which is a packet destined for the link temporary address LCoA of the mobile router MR. Packet transmission method using SMR in a mobile network, characterized in that for transmitting to the mobile router (MR). The method of claim 16, If the SMR value is greater than or equal to the predetermined value, Using the link temporary address LCoA of the mobile router MR stored in the mobile router home agent HA_MR, the visited mobile node home agent HA_VMN has a destination link temporary address LCoA of the visited mobile node VMN. SMR in a mobile network characterized in that the packet (LCoA_VMN I HoA_VMN) is encapsulated into a packet (LCoA_MR I LCoA_VMN I HoA_VMN) destined for a link temporary address (LCoA) and delivered to the mobile router (MR). Packet forwarding method using the. In the packet forwarding method in a mobile network, SMR value confirmation that checks the session arrival frequency for the packet forwarding mobile node (hereinafter referred to as "mobile node") divided by the movement frequency (Session-to-Mobility-Ratio: hereinafter referred to as "SMR value") step; An SMR value comparison step of comparing the SMR value with a predetermined value; A mobile node determination step of determining whether the mobile node which has confirmed the SMR value corresponds to a mobile router (MR) or a visited mobile node (VMN); And And a packet forwarding step of delivering a packet to the mobile node that has determined the type based on the result of comparing the SMR values, The packet forwarding step, Confirm that the mobile node is the visited mobile node VMN and that the SMR value is greater than or equal to the predetermined value, and a home address HoA of the visited mobile node VMN is determined by an external correspondent node CN. Receiving a home address (HoA) packet (HoA_VMN) of a visited mobile node (VMN) to which the visited mobile node home agent (HA_VMN) receives a packet (HoA_VMN) transmitted as a destination; The received visited mobile node (VMN) home address (HoA) packet (HoA_VMN) is a packet (RCoA_VMN I) whose destination mobile node (HA_VMN) is a local temporary address (RCoA) of the visited mobile node (VMN). Encapsulating (HoA_VMN) and delivering the “RCoA_VMN I HoA_VMN” packet to the mobile anchor point MAP; The mobile anchor point MAP sees the information stored in the binding cache, and the link temporary address LCoA of the visited mobile node VMN corresponding to the local temporary address RCoA of the visited mobile node VMN. After encapsulating the packet, the packet is created by using "LCoA_VMN I RCoA_VMN I HoA_VMN" packet, and then encapsulated one more time using the link temporary address (LCoA) of the mobile router (MR) to "LCoA_MR I LCoA_VMN I RCoA_VMN" A packet “LCoA_MR I LCoA_VMN I RCoA_VMN I HoA_VMN” delivering an I HoA_VMN ”packet and delivering the packet“ LCoA_MR I LCoA_VMN I RCoA_VMN I HoA_VMN ”to the mobile router (MR); And The mobile router (MR) decapsulates the packet (LCoA_MR I LCoA_VMN I RCoA_VMN I HoA_VMN) to transmit the decapsulated packet (LCoA_VMN I RCoA_VMN I HoA_VMN) to the visited mobile node (VMN). Forwarding packets (LCoA_VMN I RCoA_VMN I HoA_VMN) Packet forwarding method using SMR in a mobile network comprising a. delete delete

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