Wireless tag system
AssigneeDenso Wave Incorporated
InventorsYousuke Okayama, Koji Konosu, Kentarou Maruyama
Life of this patent
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Abstract
A configuration that achieves stable wireless communication. In this configuration, electrical power according to transmission waves is reliably supplied to a wireless tag serving as a target of wireless communication. A first wireless communication device and a second wireless communication device are provided. Both the wireless communication devices substantially simultaneously transmit transmission waves on different channels separated from each other by a predetermined frequency or more on a frequency band in the frequency axis, when performing wireless communication processing to wirelessly communicate with a wireless tag in a predetermined communication area.
Claims24
A wireless tag system comprising:
- two or more wireless communication devices which are enabled to wirelessly communicate with a wireless tag to be placed in a predetermined physically defined communication area;
- the two or more wireless communication devices being configured to transmit transmission waves on mutually different channels and simultaneously transmit the transmission waves toward the predetermined physically defined communication area for a predetermined period of time or a period of time larger than the predetermined period of time, the different channels being separated from each other in a frequency band by a predetermined frequency or a frequency higher than the predetermined frequency and having no interference in the transmission waves between different channels, the transmission waves transmitted by the two or more wireless communication device being intensified in power in the predetermined physically defined communication area such that electrical power supply to the wireless tag is increased more than outside the predetermined physically defined communication area;
- and
- the wireless tag being configured to have frequency bandwidth characteristics which enable the wireless tag to simultaneously receive the transmission waves transmitted by two or more wireless communication devices.
Dependencies are inferred from the claim text.