Electromagnetic wave communication system, apparatus, method and program
First Claim
1. A communication apparatus comprising:
- a carrier wave generator configured to generate a first electromagnetic wave using an antenna;
a modulator configured to modulate the first electromagnetic wave for transmitting a first message to an external communication device;
a load modulator configured to modulate a second electromagnetic wave generated by the external communication device for transmitting a second message from the communication apparatus to the external communication device; and
a controller configured to cause the communication apparatus to;
transmit the first message when the second electromagnetic wave is not detected and,transmit the second message, which is different from the first message, when the second electromagnetic wave is detected,wherein the first message is a first inquiry for identification information of the external communication device,wherein the communication apparatus is configured to receive a first response in response to the first inquiry, and after receiving the first response, the controller is configured to cause the communication apparatus to transmit a third message and receive a second response to the third message from the external communication device, the second response including protocol information from the external communication device, andwherein in response to receiving the second response, the communication apparatus is configured to switch a communication protocol to communicate at a higher transmission rate.
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Accused Products
Abstract
A communication system, a communication apparatus, a communication method, and a program for acquiring the advantage of a plurality of communication protocols is provided. A random number and a first communication information including first identification information of a communication apparatus is sent to another communication apparatus by using near field communication. Second communication information is received by the communication apparatus from the other communication apparatus by using near field communication. The second communication information includes second identification information of the other communication apparatus necessary to a second communication. The second communication is performed between the communication apparatus and the other communication apparatus by using the second communication information received by using the near field communication.
12 Citations
19 Claims
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1. A communication apparatus comprising:
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a carrier wave generator configured to generate a first electromagnetic wave using an antenna; a modulator configured to modulate the first electromagnetic wave for transmitting a first message to an external communication device; a load modulator configured to modulate a second electromagnetic wave generated by the external communication device for transmitting a second message from the communication apparatus to the external communication device; and a controller configured to cause the communication apparatus to; transmit the first message when the second electromagnetic wave is not detected and, transmit the second message, which is different from the first message, when the second electromagnetic wave is detected, wherein the first message is a first inquiry for identification information of the external communication device, wherein the communication apparatus is configured to receive a first response in response to the first inquiry, and after receiving the first response, the controller is configured to cause the communication apparatus to transmit a third message and receive a second response to the third message from the external communication device, the second response including protocol information from the external communication device, and wherein in response to receiving the second response, the communication apparatus is configured to switch a communication protocol to communicate at a higher transmission rate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A communication method for a communication apparatus, the communication method comprising:
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generating a first electromagnetic wave by a carrier wave generator using an antenna; modulating the first electromagnetic wave for transmitting a first message to an external communication device by a modulator, wherein the first message is a first inquiry for identification information of the external communication device; modulating, by a load modulator, a second electromagnetic wave generated by the external communication device for transmitting a second message from the communication apparatus to the external communication device; transmitting the first message when the second electromagnetic wave is not detected; transmitting the second message, which is different from the first message, when the second electromagnetic wave is detected; receiving a first response in response to the first inquiry; after receiving the first response, transmitting a third message; receiving a second response to the third message from the external communication device, the second response including protocol information from the external communication device; and in response to receiving the second response, switching a communication protocol to change data transmission from a lower transmission rate to a higher transmission rate. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
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19. A non-transitory computer readable storage medium storing instructions, which when executed by a communication apparatus is configured to cause the communication apparatus to:
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generate a first electromagnetic wave by a carrier wave generator using an antenna; modulate the first electromagnetic wave for transmitting a first message to an external communication device by a modulator, wherein the first message is a first inquiry for identification information of the external communication device; modulate, by a load modulator, a second electromagnetic wave generated by the external communication device for transmitting a second message from the communication apparatus to the external communication device; transmit the first message when the second electromagnetic wave is not detected; transmit the second message, which is different from the first message, when the second electromagnetic wave is detected; receive a first response in response to the first inquiry; after receiving the first response, transmit a third message; receive a second response to the third message from the external communication device, the second response including protocol information from the external communication device; and in response to receiving the second response, switching a communication protocol to change data transmission from a lower transmission rate to a higher transmission rate.
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Specification