Communication apparatus and method of controlling the same

A communication device and network communication technology, applied in transmission systems, electrical components, etc., can solve problems such as communication errors and achieve the effect of reducing communication errors

Inactive Publication Date: 2011-01-05
CANON KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this case, in the communication server that changes the provided information according to the source address of each client or in the communication server that performs authentication based on the client address, if the source address is changed in a series of transactions, there is communication error

Method used

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  • Communication apparatus and method of controlling the same
  • Communication apparatus and method of controlling the same
  • Communication apparatus and method of controlling the same

Examples

Experimental program
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Embodiment Construction

[0020] Now, the present invention will be described in detail with reference to the drawings showing embodiments of the invention.

[0021] figure 1 is a network configuration diagram of an example of a network environment in which a client PC as a communication device according to the first embodiment of the present invention is set.

[0022] like figure 1 As shown, a client PC 100 is connected to a server PC 105 via a network 106 (implemented by, for example, a LAN (Local Area Network) or a WAN (Wide Area Network)) as an example of a communication device according to the first embodiment of the present invention.

[0023] Client PC 100 maintains an IP address to communicate with server PC 105 or other communication device (not shown) via network 106 . The server PC 105 provides services in response to requests from the client PCs 100 . The services provided by the server PC 105 include services such as Web, DNS, mail, SNMP agent, and WS-Eventing (World Wide Web Service Ev...

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PUM

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Abstract

A communication apparatus capable of selecting a proper source address even when a plurality of source addresses are assigned thereto and reducing the occurrence of a communication error caused by a source address change during communication processing. A transmission section transmits data. A transmission information management section manages transmission information including data identification information for identifying a type of data to be transmitted, and a destination address and source address of the data. A source address-determining section is operable when data to be transmitted is of a specific type, to refer to the managed transmission information, and out of the assigned source addresses, determine a source address used in the past for transmitting data to a destination address of the data to be transmitted, as a source address thereof. A communication control section causes the transmission section to transmits the data using the determined source address.

Description

technical field [0001] The present invention relates to a communication device assigned a plurality of source addresses for network communication and a control method of the communication device. Background technique [0002] Conventionally, various types of devices including PCs (Personal Computers), printers, MFPs (Multi-Function Peripherals) have been used as communication devices capable of connecting to a network (eg Intranet, Internet, LAN, etc.). Generally, a widely used protocol in communication devices connected to a network is Internet Protocol (IP). Under the IP protocol, each device is assigned a unique IP address so that connected devices can identify each other based on the IP address. [0003] In general, under the traditional IP protocol (IPv4 (IP version 4)), a single IP address is assigned to a single network interface (I / F) as a means of identifying a communication device from other communication devices on the network IP address. On the other hand, und...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L29/12H04L29/06
CPCH04L29/12009H04L61/00
Inventor 和田雄弘
Owner CANON KK
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