发明名称 |
ACTIVE CONTACTLESS INFORMATION STORAGE DEVICE, METHOD, AND INFORMATION ACCESS SYSTEM |
摘要 |
An active contactless information storage device includes: an operation controller that determines whether mode information of the active contactless information storage device indicates a mode in which the device communicates with a reader/writer device; a carrier-sense controller that determines whether a first frequency in a first period and determines whether a second frequency in a second period, when the mode information of the active contactless information storage device indicates the mode in which the device communicates with the reader/writer device; and a command processor that performs communication with the reader/writer device when the carrier sense controller determines that the first frequency is sensed; wherein, when the mode information of the active contactless information storage device does not indicate the mode in which the active contactless information storage device communicates with the reader/writer device, the carrier-sense controller waits for a predetermined amount of time. |
申请公布号 |
US2012133491(A1) |
申请公布日期 |
2012.05.31 |
申请号 |
US201113303630 |
申请日期 |
2011.11.23 |
申请人 |
YAMASHITA DAISUKE;SHIOTSU SHINICHI;SUGANO HIROYASU;TANAKA HIDEKI;FUJITSU LIMITED |
发明人 |
YAMASHITA DAISUKE;SHIOTSU SHINICHI;SUGANO HIROYASU;TANAKA HIDEKI |
分类号 |
G06K7/01 |
主分类号 |
G06K7/01 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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