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Erschienen in:
2012 | OriginalPaper | Buchkapitel
Realization of Coordinative Control Between Multi Readers and Multi RF-SIM Cards Under Mobile RF-SIM Mode
verfasst von : Songsen Yu, Yun Peng, Xiaopeng Huang
Erschienen in: Computer Science and its Applications
Verlag: Springer Netherlands
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Abstract
RF-SIM card is a highly integrated system which packets a 2.45 GHZ radio frequency interface chip and a high-security payment chip to an ordinary SIM card. In order to solve the identifications and accesses of multi readers to multi RF-SIM cards. We make full use of the ability of 2.45 GHZ frequency which supports multi channels to divide RF-SIM channel into three types of channel: reservation channel, coordination channel and working channel. The RF-SIM reader should reverse a coordination channel before inquiring RF-SIM cards. After the reservation then it inquires the RF-SIM cards within its communication area. RF-SIM card takes turns to select a coordination channel to response card randomly. After the successful handshaking then RF-SIM card turns to a working channel to transmit datum. This method can effectively solve the identifications and accesses of multi readers to multi RF-SIM cards. The approach of its realization is proposed.