Communication device, communication method, program and communication system
First Claim
1. A communication device comprising:
- an electromagnetic-wave generating unit for outputting a first electromagnetic wave;
a transmitting and receiving unit for transmitting signal by modulating the first electromagnetic wave in accordance with data and receiving signal transmitted from a second device by demodulating the first electromagnetic wave outputted by the electromagnetic-wave generating unit or a second electromagnetic wave outputted by the second device as a second party of communication; and
a control unit for controlling output of the first electromagnetic wave in at least one of a first mode and a second mode,wherein power consumption of the communication device in the second mode is lower than the first mode;
wherein the control unit is configured to select the at least one of the first mode and the second mode based on signal outputted from the second device; and
wherein the first electromagnetic wave outputted by the electromagnetic-wave generating unit in the second mode includes a shorter period than the first mode.
1 Assignment
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Accused Products
Abstract
A communication device includes: an electromagnetic-wave generating unit for outputting an electromagnetic wave; and a transmitting/receiving unit for transmitting data by modulating the electromagnetic wave in accordance with data and receiving data transmitted from the other device by demodulating the electromagnetic wave outputted by the electromagnetic-wave generating unit or the electromagnetic wave outputted by the other device as the other party of communication, wherein the transmitting/receiving unit transmits attribute information indicating communication ability of the device and receives attribute information indicating communication ability of the other device, and the electromagnetic-wave generating unit reduces power of the electromagnetic wave to be outputted after receiving the attribute information.
22 Citations
14 Claims
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1. A communication device comprising:
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an electromagnetic-wave generating unit for outputting a first electromagnetic wave; a transmitting and receiving unit for transmitting signal by modulating the first electromagnetic wave in accordance with data and receiving signal transmitted from a second device by demodulating the first electromagnetic wave outputted by the electromagnetic-wave generating unit or a second electromagnetic wave outputted by the second device as a second party of communication; and a control unit for controlling output of the first electromagnetic wave in at least one of a first mode and a second mode, wherein power consumption of the communication device in the second mode is lower than the first mode; wherein the control unit is configured to select the at least one of the first mode and the second mode based on signal outputted from the second device; and wherein the first electromagnetic wave outputted by the electromagnetic-wave generating unit in the second mode includes a shorter period than the first mode. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A communication method in a communication device including an electromagnetic-wave generating unit and a transmitting and receiving unit, the method comprising:
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transmitting signal by modulating a first electromagnetic wave in accordance with data; receiving signal transmitted from a second device by demodulating the first electromagnetic wave outputted by the electromagnetic-wave generating unit or a second electromagnetic wave outputted by the second device as a second party of communication; and selecting the first electromagnetic wave in at least one of a first mode and a second mode, wherein power consumption of the communication device in the second mode is lower than the first mode, and wherein the first electromagnetic wave outputted by the electromagnetic-wave generating unit in the second mode includes a shorter period than the first mode.
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8. A communication system comprising:
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a first communication device; and a second communication device, wherein the first communication device includes; an electromagnetic-wave generating unit for outputting a first electromagnetic wave; a first transmitting and receiving unit for transmitting signal by modulating the first electromagnetic wave in accordance with data and receiving signal transmitted from the second communication device by demodulating the first electromagnetic wave outputted by the electromagnetic-wave generating unit or a second electromagnetic wave outputted by the second communicate device; and a control unit for controlling output of the first electromagnetic wave in at least one of a first mode and a second mode, wherein power consumption of the first communication device in the second mode is lower than the first mode; wherein the control unit is configured to select the at least one of the first mode and the second mode based on signal outputted from the second device; and wherein the first electromagnetic wave outputted by the electromagnetic-wave generating unit in the second mode includes a shorter period than the first mode, the second communication device includes; a second transmitting and receiving unit for receiving the signal transmitted from the first communication device by demodulating the first electromagnetic wave outputted by the first communication device, and transmitting signal by modulating the first electromagnetic wave outputted by the first communication device or the second electromagnetic wave outputted by the second communication device. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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Specification