Crossover node detection method and crossover node detection program for causing computer to execute the method
A technology of cross node and detection method, which is applied in the field of cross node detection and the program field of using computer to execute the cross node detection, which can solve the problems of inability to obtain empty information and difficulty in changing QoS paths
Inactive Publication Date: 2008-06-11
PANASONIC CORP
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Therefore, for example, when MN10 performs handover between subnets 20 and 30 and the CoA of MN10 is changed, on the QoS path, in addition to flow (flow) changes, processing related to address changes must also be performed, but RSVP cannot cope with such a change, and as a result, the QoS guarantee will be broken (the first problem: it is difficult to change the QoS path)
In addition, even if a QoS path is newly set up, if a QoS path overlap occurs before and after the handover, a double reservation (double reservation) may occur in the overlapped portion (the second problem: double reservation) resource reservation)
It cannot be returned to MN10 as an empty resource (used in the new path after MN10 moves), and as a result, MN10 cannot obtain the correct empty information of the resource
This problem is not only when the mobile MN10 proposes a request based on the QUERY message, but also when any QNE (such as QNE67) on the path 34 sends a QUERY message.
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[0079] Next, an embodiment of the present invention will be described using FIGS. 1 to 23 . FIG. 1 is a schematic configuration diagram of a communication system according to an embodiment of the present invention. In FIG. 1 , the QoS path (path 24 ) established between the MN 10 and the CN 60 in the state connected to the subnet 20 before handover is shown by a solid line. AR21, NE62, QNE63, NE64, QNE65, and QNE66 exist on the route 24 from MN10 to CN60. Similarly, when the MN10 is connected to the subnet 30 after the handover, the QoS path established between the MN10 and the CN60 (the path 34 is indicated by a dotted line). On this route 34, AR31, QNE (proxy server) 68, QNE67, NE64, QNE65, and QNE66 exist from MN10 to CN60. Therefore, the QNE (CRN) at which the old path (path 24 ) and the new path (path 34 ) start to intersect is QNE65.
[0080] The functions of the MN10 are described below. Fig. 2 is a block diagram showing the configuration of the MN according to the ...
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There is disclosed a technique to provide a crossover node detection method capable of rapidly finding a CRN so that a mobile terminal performing a handover can receive the additional service received before the handover rapidly and continuously after the handover. The method includes: a step for transmitting, by the mobile terminal (10), necessary information for detecting a cross over node to a device having past mobile history information on itself and other mobile terminals; a step for judging, by the device, whether the mobile history information owned by the device contains corresponding crossover node information according to information contained in the received message and transmitting the information to the mobile terminal if one exists; and a step for receiving, by the mobile terminal, the crossover node information transmitted from the device.
Description
[0001] technology area [0002] The present invention relates to a method for detecting a crossing node using a handover of a mobile terminal (mobile node) performing wireless communication and a program for detecting a crossing node using a computer for executing the method, and particularly relates to a method for detecting a crossing node using The mobile IPv6 (Mobile Internet Protocol version 6) protocol performs a cross node detection method for the handover of a mobile node for wireless communication, and a program for cross node detection for executing the method by a computer. Background technique [0003] As a technology that enables users who access communication networks such as the Internet from mobile terminals to use wireless networks to seamlessly connect to communication networks even while moving, technologies using mobile IPv6, which is the next-generation Internet protocol, are gaining popularity. Next, a wireless communication system using the mobile IPv6 w...
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IPC IPC(8): H04L12/56H04L12/28H04Q7/22H04W28/26H04W36/00H04W36/12H04W40/36H04W80/04
CPCH04W28/26H04W80/04H04W36/0011H04W40/36H04W36/0019
Inventor 上丰树堀贵子
Owner PANASONIC CORP