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Communication device, communication method and communication system

A technology of a communication device and a communication partner is applied in the field of communication systems to achieve the effect of improving communication quality

Active Publication Date: 2020-04-17
SONY CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Further improvement in communication quality is expected

Method used

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

Examples

Experimental program
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no. 1 example

[0038] 【Configuration example】

[0039] figure 1 An example of the configuration of the communication system 1 including the communication device according to the first embodiment is shown. The communication system 1 communicates according to near field communication. It should be noted that the communication method according to the embodiment of the present disclosure is also embodied by this embodiment, so it will be described together. The communication system 1 includes a communication device 10 and a communication device 20 .

[0040] The communication device 10 and the communication device 20 communicate with each other through a magnetic field. In the communication system 1, specifically, the coil 15 in the communication device 10 is coupled to the coil 21 in the communication device 20 through a magnetic field, thereby transmitting or receiving data through electromagnetic induction. Coils 15 and 21 are described later. In this case, communication device 10 transm...

Deformed example 1-1

[0112] In the foregoing embodiments, the synchronization detector 40 detects whether synchronization is lost by comparing the phases of the signal Sin and the signal SIG30 with each other; however, the detection method is not limited thereto. As an alternative example, the synchronization detector 40 may compare the pulse numbers in the signal Sin and the signal SIG30 to detect whether synchronization is lost based on the degree to which the pulse numbers coincide with each other.

Deformed example 1-2

[0114] In the aforementioned embodiments, the synchronization detector 40 detects whether synchronization is lost based on the signal Sin and the signal SIG30; however, the detection method is not limited thereto. As an alternative example, it is possible to detect loss of synchronization without using the signal Sin, as in Figure 12 Sync detector 40A shown in . Figure 12 The illustrated communication system 1A includes a communication device 20A that includes a sync detector 40A. Synchronization detector 40A detects whether synchronization is lost by counting the number of pulses in signal SIG30 for a predetermined length of time. That is, the frequency of the carrier signal transmitted by the communication device 10 is known. Therefore, it is possible to detect whether synchronization is lost based on the frequency of signal SIG30. For example, the sync detector 40A may have a crystal oscillator or the like to acquire the above-mentioned preset time length based on its ...

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PUM

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Abstract

The communication device is provided with: a phase synchronizer to generate a second signal based on a first signal received from a communication partner; a first modulator configured to be able to modulate the first signal based on the second signal; and a detector to detect the first The synchronization between the signal and the second signal is lost.

Description

technical field [0001] The present disclosure relates to a communication device for near field communication (NFC), a communication method for such a communication device, and a communication system including such a communication device. Background technique [0002] Near Field Communication is a technology that is increasingly used mainly in Asia, for example in the fields of transportation systems, accounting and certification. This technology has been approved as an international standard. The specification of near field communication (hereinafter also referred to as NFC specification) has, for example, compatibility with various other specifications such as Type A, Type B, FeliCa (registered trademark), and ISO15693 specifications, ie, so-called upward compatibility. In other words, when a reader / writer or card is compatible with NFC specifications, it is also compatible with all those specifications. [0003] In near field communication, as an example, a reader / writer...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B1/59
CPCH04L7/0083H04L7/033H04L27/04H04L27/06H04L27/066H04L2027/0024H04W56/001H04W56/003H04W56/0065H04B5/24H04B5/45H04B5/266H04B5/72H04W4/80H04L7/0331H04L27/34
Inventor 中野裕章藤田浩章大前宇一郎藤原徹哉山本洋也
Owner SONY CORP