Handover method in mobile communication system and router device used in mobile communication system

A handover and router technology, applied in the field of router equipment, can solve problems such as statelessness, disordered packet order, and inefficient routing selection

Inactive Publication Date: 2004-01-14
FUJITSU LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] (2) Network startup, stateless;
[0011] (3) The mobile node starts, stateless
[0031] (3) Packet loss
[0046] In summary, in t...

Method used

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  • Handover method in mobile communication system and router device used in mobile communication system
  • Handover method in mobile communication system and router device used in mobile communication system
  • Handover method in mobile communication system and router device used in mobile communication system

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Embodiment Construction

[0082] The embodiments of the present invention are described below with reference to the drawings.

[0083] Figure 7 The outline of the present invention is shown. inFigure 7 Suppose that mobile node 1 is communicating with a corresponding node 4. It is also assumed that the original care-of address is assigned to the mobile node 1 in the communication area of ​​the original access router 11. Furthermore, it is assumed that a new care-of address is assigned to the mobile node 1 in the communication area of ​​the new access router 12. The following describes the measures taken to solve the three problems that appear in the current fast handover.

[0084] (1) Inefficient routing

[0085] In the handover process of the present invention, when the mobile node 1 moves from the communication area of ​​the original access router (first router device) 11 to the communication area of ​​the new access router (second router device) 12, a collection update The message is sent from the mob...

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Abstract

An old care-of address is assigned to a mobile node in the communication area of the old access router and the mobile node is communicating with a correspondent node. Immediately before the mobile node enters the communication area of a new access router, a binding update message is transmitted to a diverging point router. The diverging point router is a router device located in the node where a route from the correspondent node to the old access router and a route from the correspondent router to the new access router are diverged. The diverging point router transfers packets addressed to the old care-of address to the new care-of address assigned to the mobile node in the communication area of the new access router.

Description

Technical field [0001] The present invention relates to a handover method in a mobile communication system and a router device used in a mobile communication system. The present invention particularly relates to a method for handover in an IP network provided by a mobile communication service and its A kind of router. Background technique [0002] In recent years, with the rapid spread of the Internet and cellular phones, various systems to access the Internet have been developed. For example, second-generation mobile communication networks such as GPRS (General Packet Radio System), PDC-P (Personal Digital Cellular Mobile Packet Communication System), third-generation mobile communication networks such as UMTS (Universal Mobile Telecommunications System), and Small-scale wireless access networks such as wireless LAN and Bluetooth have been put into practical use. In the future, it is expected that the fourth-generation mobile communication network and other new access technologi...

Claims

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Application Information

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IPC IPC(8): H04L12/28H04L45/17H04L45/80H04W36/00H04W36/02H04W36/08H04W36/36H04W36/38H04W40/34H04W60/00H04W76/04H04W80/04H04W88/00
CPCH04L29/12311H04W36/02H04W88/005H04W80/04H04W36/0011H04L61/2084H04L61/5084H04W36/0019
Inventor 田草川英明武智竜一中津川惠一川崎健冈和之
Owner FUJITSU LTD
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