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1. 发明专利

JP5330174B2 Tag management system 有权
公开(公告)号：JP5330174B2
公开(公告)日：2013-10-30
申请号：JP2009220597
申请日：2009-09-25
申请人：パナソニック株式会社
发明人：真理中西 , 秀生鍋嶋
IPC分类号： H04B1/59 , G06K17/00 , G06K19/07
摘要： PROBLEM TO BE SOLVED: To provide a tag management system having enhanced management accuracy by reducing the possibility of collision of signals even though the signals are periodically transmitted from a plurality of tags. SOLUTION: The tag management system includes: the plurality of tags; a reporting device for reporting a confirmation signal to the plurality of tags; and a receiver for periodically receiving, from each of one or more tags having received the confirmation signal, an identification signal for identifying the tags. In the tag management system, the reporting device periodically reports the confirmation signal with time length T0 as one period, and each of the plurality of tags includes a timer which times each time slot comprising time length T1 satisfying T0=T1×m(m is an integer ≥1), and upon receiving the confirmation signal, the reporting device resets the timer, then transmits an identification signal within one time slot to the receiver at least one time for each particular period being equal to or more than the time length T0. COPYRIGHT: (C)2011,JPO&INPIT

2. 发明专利

JP5563922B2 Wireless communication device 有权
公开(公告)号：JP5563922B2
公开(公告)日：2014-07-30
申请号：JP2010168653
申请日：2010-07-27
申请人：パナソニック株式会社
发明人：陽子谷利 , 隆藤井 , 淳一鈴木 , 隆之新居 , 真理中西
IPC分类号： H04B1/7073 , H04W56/00
CPC分类号： Y02D70/00 , Y02D70/40
摘要： PROBLEM TO BE SOLVED: To provide a radio communication apparatus surely receiving data while improving a receiver sensitivity.SOLUTION: In this embodiment, a communication frame comprises a synchronization part, a processing part and a information part. The synchronization part is spread using a spread code for synchronization with higher spreading rate (longer code length of the spread code) than a spread code for communication of the information part and the processing part has longer processing time period than that of a synchronous acquisition process. Therefore, a receiver 2 can surely establish synchronization even when a reception strength (signal level) of input signal (spread spectrum signal) received at a receiving part 21 is relatively reduced.

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