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    • 8. 发明授权
    • Communication system, communication apparatus, and communication method
    • 通信系统,通信设备和通信方法
    • US08514688B2
    • 2013-08-20
    • US10538659
    • 2003-12-08
    • Kunihide FujiiTadashi MoritaShigeru ArisawaYoshihisa Takayama
    • Kunihide FujiiTadashi MoritaShigeru ArisawaYoshihisa Takayama
    • H04J9/00H04L12/413
    • H04B5/0056H04B5/0031H04W74/0808
    • An RF (radio frequency) signal is generated at a first communication device and is modulated. A second RF signal provided to the first communication device from the second communication device is demodulated. The second RF signal is detected. The generating is actuated to initiate an active or a passive mode communication, when the detecting does not detect the second RF signal at a level of a first threshold or more, the active mode including a transmission of modulated data at the first communication device and the second communication device, the passive mode providing load modulated communication from the second communication device to the first communication device. When the first communication device receives an indication to start a communication of the active mode from the second communication device, the demodulating receives data at a level of a second threshold or higher, the second threshold being higher than the first threshold.
    • 在第一通信设备处产生RF(射频)信号并被调制。 解调从第二通信设备提供给第一通信设备的第二RF信号。 检测第二RF信号。 当检测不检测到处于第一阈值或更高级别的第二RF信号时,产生被激活以启动主动或被动模式通信,所述活动模式包括在第一通信设备处的调制数据的传输和 第二通信设备,被动模式提供从第二通信设备到第一通信设备的负载调制通信。 当第一通信装置从第二通信装置接收到开始活动模式的通信的指示时,解调以第二阈值或更高的水平接收数据,第二阈值高于第一阈值。
    • 9. 发明授权
    • Communication apparatus and communication method
    • 通信设备和通信方法
    • US07209706B2
    • 2007-04-24
    • US10715447
    • 2003-11-19
    • Kunihide FujiiTadashi MoritaShigeru ArisawaYoshihisa Takayama
    • Kunihide FujiiTadashi MoritaShigeru ArisawaYoshihisa Takayama
    • H04B7/00
    • G06K7/10237G06K7/0008G06K7/10029G06K19/0723
    • A communication apparatus and a communication method prevent responses from being simultaneously received from two or more communicating parties. A first NFC apparatus transmits data for requesting IDs, and acquires IDs sent from second and third NFC apparatuses in reply to the request. After acquiring the IDs of the second and third NFC apparatuses, the first NFC apparatus transmits data that includes their IDs as the data for the second and third NFC apparatuses. If the first NFC apparatus cannot properly acquire the IDs of the second and third NFC apparatuses, then it sends the data for requesting their IDs again. Upon receipt of the request for the IDs, the second and third NFC apparatuses generate their own IDs by using random numbers and send the generated IDs. If the second and third NFC apparatuses receive the request for their IDs again, then they re-generate their own IDs by using random numbers, and send the re-generated IDs again. The present invention can be applied to, for example, an IC card system.
    • 通信装置和通信方法防止从两个或更多个通信方同时接收响应。 第一NFC设备发送用于请求ID的数据,并且从第二NFC设备和第三NFC设备发送的ID接收请求。 在获取第二和第三NFC设备的ID之后,第一NFC设备将包括其ID的数据作为第二和第三NFC设备的数据发送。 如果第一NFC设备不能正确地获取第二和第三NFC设备的ID,则再发送用于请求其ID的数据。 在接收到对ID的请求时,第二和第三NFC设备通过使用随机数生成自己的ID并发送所生成的ID。 如果第二和第三NFC设备再次接收到他们的ID的请求,则通过使用随机数来重新生成自己的ID,并再次发送重新生成的ID。 本发明可以应用于例如IC卡系统。
    • 10. 发明申请
    • Communication system, communication apparatus, and communication method
    • 通信系统,通信设备和通信方法
    • US20060245402A1
    • 2006-11-02
    • US10538659
    • 2003-12-08
    • Kunihide FujiiTadashi MoritaShigeru ArisawaYoshihisa Takayama
    • Kunihide FujiiTadashi MoritaShigeru ArisawaYoshihisa Takayama
    • H04Q7/24
    • H04B5/0056H04B5/0031H04W74/0808
    • The present invention relates to a communication system, a communication device, and a communication method for easily solving a problem of a hidden terminal. Communication devices 1 and 3 determine whether or not an electromagnetic wave at the level of a magnetic-flux density TH1 or more for determining the suppression of the output of carrier. When the electromagnetic wave at the level of the magnetic-flux density TH1 or more for determining the suppression of the output of the carrier is not detected, the communication devices 1 and 3 start the output of the electromagnetic wave. A communication device 2 needs the electromagnetic wave at the level of a magnetic-flux density TH2 or more of the carrier at an operating limit, which is higher than the magnetic-flux density TH1 for determining suppression of the output of carrier so as to obtain data via the electromagnetic wave. The present invention is applied to, e.g., an IC (Integrated Circuit) card system.
    • 本发明涉及一种用于容易解决隐藏终端问题的通信系统,通信设备和通信方法。 通信装置1和3确定用于确定抑制载波输出的磁通密度TH 1以上的电磁波。 当没有检测到用于确定对载波输出的抑制的磁通密度TH 1或更大的电磁波时,通信装置1和3开始电磁波的输出。 通信装置2需要在比载波的输出抑制的磁通密度TH 1高的运转极限的载流子的磁通密度TH 2以上的电磁波的电磁波, 通过电磁波获取数据。 本发明应用于例如IC(集成电路)卡系统。