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Communication device, communication method, computer program and computer system

A technology of communication equipment and communication rate, which is applied in the fields of computer programs and communication systems, communication methods, communication equipment, and compatibility, and can solve problems such as compatibility maintenance conflicts, and achieve the effect of maintaining compatibility

Inactive Publication Date: 2010-06-23
SONY CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, to implement these methods, a packet format different from the Felica format is used, therefore, problems involving compatibility may occur
[0022] In short, in order to increase the communication rate in a contactless communication system such as Felica communication, it is necessary to perform learning-type adaptive equalization by using a training signal with sufficient length, however, this is compatible with the packet format in the upper layer protocol sex remains conflicted

Method used

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  • Communication device, communication method, computer program and computer system
  • Communication device, communication method, computer program and computer system
  • Communication device, communication method, computer program and computer system

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Embodiment Construction

[0061] Hereinafter, embodiments of the present invention will be explained in detail with reference to the accompanying drawings.

[0062] figure 1 A structural example of an inductive coupling part in an electromagnetic induction type contactless communication system having a transponder and a reader / writer is mainly shown. The antenna resonance circuits 12, 32 respectively included in the reader / writer 10 and the transponder 30 are electromagnetically coupled to exchange information signals.

[0063] The antenna resonance circuit 12 in the reader / writer 10 includes a resistor R 1 , Capacitor C 1 and coil L 1 , to send the information signal generated by the processing unit 11 to the transponder 30 side. The antenna resonance circuit 12 receives the information signal from the transponder 30 and supplies the signal to the processing unit 11 . through capacitor C 1 Capacitance and coil L 1 The inductance of the antenna resonance circuit 12 presets the natural resonance...

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Abstract

The invention relates to a communication device, a communication method, a computer program and a computer system. The communication device includes: a first communication processing unit performing contactless communication operations in a first communication rate in which waveform distortion hardly become a problem; a second communication processing unit performing contactless communication operations in a second communication rate in which waveform shaping by adaptive equalization is necessary; and a control unit controlling communication processing by the first and second communication processing units, wherein the first communication processing unit stores the contents of a packet received in the first communication rate, and the second communication processing unit, when receiving the packet of the same contents in the second communication rate, performs adaptive equalization processing by using the stored contents of the packet.

Description

technical field [0001] The present invention relates to a communication device, a communication method, and a computer that perform communication operations when a reader / writer (initiator) transmits a request command or a responder (target) transmits a response command to the request command in contactless communication The program and the communication system, specifically, relate to a communication device, a communication method, a computer program, and a communication system that perform contactless communication conforming to the NFC (Near Field Communication) standard. [0002] More specifically, the present invention relates to a communication device, a communication method, a computer program, and a communication system that use adaptive equalization to solve the disordered reception waveform caused by the acceleration of the communication rate, and especially relate to a method that maintains a packet format and a packet format based on a given standard. A communicati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/00G06K17/00
CPCH04B5/0075H04B5/24
Inventor 后藤哲郎福田伸一三保田宪人上野正俊
Owner SONY CORP