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Communication method, mobile agent device, and home agent device

A technology of mobile agent and local agent, which is applied in wireless communication, network data management, digital transmission system, etc., and can solve problems such as inability to communicate and use

Inactive Publication Date: 2012-09-19
NTTPC COMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, in the mode using FA in the above-mentioned prior art, it is necessary to install FA in the access destination network, and when the terminal moves to a network without FA, communication cannot be performed
In addition, in both the FA mode and the CoA mode, it is necessary to install the Mobile IP function in the terminal in advance, so the existing Mobile IP cannot be used in devices that are difficult to install the Mobile IP function (such as copiers and POS cash registers). technical problem

Method used

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  • Communication method, mobile agent device, and home agent device
  • Communication method, mobile agent device, and home agent device
  • Communication method, mobile agent device, and home agent device

Examples

Experimental program
Comparison scheme
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no. 1 Embodiment approach

[0059] [System Structure Outline]

[0060] Figure 6 It shows the system structure of the layer 2 tunneling method. In the Layer 2 tunnel mode, the MFA and the HA perform the role of a Layer 2 bridge connecting the MN and the router of the local network, and the MN is connected to the router of the local network through the Layer 2 bridge. The HA is connected to the local network, and the HA operates as a Layer 2 switch in the local network. Next, an outline of operations when the MFA and the MN exist in the access destination network will be described.

[0061] All Ethernet (registered trademark) frames transmitted from the MN are received by the MFA (for example, the MN-side interface of the MFA is set to a promiscuous mode). The MFA determines whether the source IP address of the IP header in the received Ethernet (registered trademark) frame is registered, and if registered, includes the Ethernet (registered trademark) frame in the MIP header of the Ethernet (registered...

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PUM

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Abstract

A communication system includes an MN, an MFA connected to the MN, and an HA connected to a home network of the MN. The HA holds a layer 3 address of the MN and a layer 3 address of the a registration request transmission source while correlating them to each other. The MFA encapsulates a layer 2 frame from the MN and transmits it to the HA. The HA decapsulates the frame and transmits it to the home network. Upon reception of the layer 2 frame from the home network, the HA checks whether the destination layer 3 address is registered, encapsulates the layer 2 frame, and transmits it to the layer 3 address of the transmission source of the registration request registered while being correlated with the destination layer 3 address. The MFA decapsulates the encapsulated layer 2 frame and transmits it to the MN.

Description

technical field [0001] The present invention relates to a technique for performing communication without changing an IP address before and after the movement even if the terminal moves between networks. Background technique [0002] As an existing technology for continuing communication using the same IP address even if a terminal moves between networks, there is Mobile IP technology specified in RFC3344, for example. [0003] In the Mobile IP structure stipulated in RFC3344, FA (Foreign Agent, foreign agent) is set in advance in the network supporting Mobile IP. When the terminal (MN: Mobile Node, mobile node) is connected to the network, it uses the Mobile IP protocol to discover the FA, and notifies the FA of its own address information. Then, the FA notifies an HA (Home Agent) installed on the Internet that the terminal is connected, and the HA registers address information on the terminal. A packet sent from a corresponding terminal (CN: Correspondent Node, communicat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/56H04L12/701H04W8/26H04W40/34H04W80/04
CPCH04W8/06H04L61/103H04W80/04H04W88/182H04W60/00H04W8/04H04L61/6013H04L61/59H04W8/02
Inventor 波多浩昭二名信彰石川玄
Owner NTTPC COMM