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Transmission of packet data

A technology of packet data network and transmitting data, which is applied in the direction of transmission system, network data management, data exchange through path configuration, etc., and can solve the problem of changing the operation of the home agent

Inactive Publication Date: 2008-02-20
MOTOROLA MOBILITY LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Once again, however, this requires significant changes to the home agent's operations since the home agent typically only has to store and use one care-of-address for the mobile node.

Method used

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  • Transmission of packet data
  • Transmission of packet data
  • Transmission of packet data

Examples

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Embodiment Construction

[0026] Figure 1 is a schematic illustration of a network architecture 1 for operating Mobile IP, to which an embodiment of the invention may be applied. In this example the network architecture operates according to Mobile IPv4, but in other examples could operate according to Mobile IPv6 and indeed any other suitable protocol could be used.

[0027] The network architecture 1 includes a number of elements connected via the Internet 2 . The elements are a mobile node 4 , a home agent 6 , a foreign agent (not shown), a one-way feed 8 and a correspondent node 10 . There is a unidirectional link 12 from the unidirectional feeder 8 to the mobile node 4 . There is a bidirectional link from and to mobile node 4 .

[0028] Typically, a mobile node 4 is a host or router that can change location, eg, from being attached to one network or subnetwork to attaching to another network or subnetwork, without changing its IP address. The mobile node has a receive-only unidirectional interf...

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Abstract

A method and system, for transmitting data to a mobile node (4) over a unidirectional link (12) in a packet data network, for example an IP network, comprises: sending a message from a protocol address, e.g. IP address, of a bidirectional interface at the mobile node (4) to the home agent (6), the message comprising a protocol address of a unidirectional interface at the mobile node (4), wherein the protocol address of the bidirectional interface is different to the protocol address of the unidirectional interface; the home agent (6) transmitting data to the mobile node (4) using the protocol address of the unidirectional interface as the care-of-address; and delivering the transmitted data via the unidirectional link (12) to the unidirectional interface of the mobile node (4). The protocol address of the unidirectional interface may be contained in the message in the form of an extension appended to a registration.

Description

technical field [0001] The present invention relates to routing data packets to mobile nodes over links of a packet data network, such as an Internet Protocol (IP) network. Background technique [0002] The Internet Protocol (IP) is a long-established protocol for routing data packets over packet data networks, such as on the Internet. Examples of specific versions of IP are IP version 4 (IPv4) and IP version 6 (IPv6). [0003] A protocol for supporting mobile nodes based on IP, such as mobile devices such as mobile phones, portable computers with wireless connection functions, etc., especially Mobile IPv4 based on IPv4 and based on Mobile IPv6 for IPv6. [0004] IP and Mobile IP protocols are standardized by the Internet Engineering Task Force (IETF). Details of Mobile IPv4 can be found in the IETF's specification RFC 3344 "IP Mobility Support for IPv4". Mobile IPv6 is described in David W. Johnson and Charles Perkins, Mobility Support in IPv6, Internet Draft, 2000. Fu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/28H04L29/06
CPCH04W60/005H04L29/12952H04W80/04H04L61/6077H04W8/082H04L2101/677H04L61/00H04W8/04
Inventor 米格尔·卡塔利娜戴维·加雷克郑杭勇埃里克·梅林
Owner MOTOROLA MOBILITY LLC
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