Data transfer system, communication protocol conversion cradle, address conversion method used therefor, and program thereof

A communication protocol conversion, data transmission system technology, applied in the transmission system, data exchange through path configuration, multiplexing communication, etc., can solve problems such as IP address conflicts, to ensure security, reduce import costs and operation. The effect of managing costs and reducing lead-in time

Inactive Publication Date: 2005-12-28
NEC PLATFORMS LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] In addition, in the existing method of connecting a handheld terminal to a network, when the combination of connection between the cradle and the handheld terminal is not fixed, unless the number of allocated IP addresses matches the number of the handheld terminal, there will be An IP address conflict occurs

Method used

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  • Data transfer system, communication protocol conversion cradle, address conversion method used therefor, and program thereof
  • Data transfer system, communication protocol conversion cradle, address conversion method used therefor, and program thereof
  • Data transfer system, communication protocol conversion cradle, address conversion method used therefor, and program thereof

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Embodiment Construction

[0035] Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing the structure of a data transmission system according to a first embodiment of the present invention. In FIG. 1 , the data transmission system according to the first embodiment of the present invention consists of a server 1 , a base 2 connected to the server 1 through a wired area 101 , and a handheld terminal 3 connected to the base 2 through a wireless area 102 .

[0036] FIG. 2 is a block diagram showing the structure of the base 2 of FIG. 1 . In Fig. 2, the base 2 is composed of an IP (Internet Protocol) address conversion part 21, an on / off setting circuit 22, an operating IP address holding area 23, an initial IP address holding area 24, and a MAC (Media Access Control) address holding area 25. , an IP address memory (#1) 26, an IP address memory (#2) 27 and a recording medium 28.

[0037]The recording medium 28 stores a computer execut...

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Abstract

The present invention proposes a data transmission system capable of reducing the number of IP addresses used. When the handheld terminal starts sending data to the server, the base converts the source IP address in the IP header of the IP packet sent from the handheld terminal to the server from the handheld terminal side IP address to the base IP address, and then transfers the data sent to the server. The server determines from the received IP packets that the data is sent from the base, and sends a reply to the base. Since the cradle must send the received IP packet in the reply to the handheld terminal, the cradle converts the destination IP address in the IP header from the cradle's own IP address to the handheld terminal's IP address, and then sends the data.

Description

technical field [0001] The present invention relates to a data transmission system, a communication protocol conversion base, an address conversion method for it, and a program thereof, and particularly relates to an address conversion for connecting a hand-held terminal to a network. Background technique [0002] When using a handheld terminal for business purposes, it is better to use a non-contact system for communication between the handheld terminal and the server when physically connecting the handheld terminal with a connector from the standpoint of operability and durability . A dock that utilizes infrared communication is often used as one of these types of systems. Other methods of connecting a handheld terminal and a server etc. through a cradle include wired connection (for example, see Patent Documents 1 and 2). [0003] The use of LAN (Local Area Network) as a base communication system is increasing due to reasons such as communication speed, direct data tran...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04J3/16H04J3/22H04L29/12
CPCH04L61/2514H04L61/5038H04L12/28G06F13/00
Inventor 林克年
Owner NEC PLATFORMS LTD
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