Multi-application IC card with delegation feature
    1.
    发明授权
    Multi-application IC card with delegation feature 失效
    具有授权功能的多功能IC卡

    公开(公告)号:US06220510B1

    公开(公告)日:2001-04-24

    申请号:US09064915

    申请日:1998-04-23

    IPC分类号: G06K500

    摘要: A multi-application IC card which processes two or more applications using an Application Abstract Machine architecture. The AAM architecture only allows one application to be executed at a time and allows for shared processing by performing a delegation function to a second application. A data space for each application is allocated when the application is selected to be executed. The data space includes a volatile and non-volatile region. The delegation function temporarily interrupts the execution of the first application, saves the temporary data of the first application, shares any data needed with the second application and the second application is executed until the delegated task is competed. The first application then retrieves the saved data and completes its execution. A delegator stack is used to keep track of the delegator's identity when multiple delegations occur. The AAM model allows for a high level of security while transferring data between applications.

    摘要翻译: 一种使用Application Abstract Machine架构处理两个或多个应用程序的多应用IC卡。 AAM架构仅允许一次执行一个应用,并且通过对第二应用执行委托功能来允许共享处理。 当应用被选择执行时,分配每个应用的数据空间。 数据空间包括易失性和非易失性区域。 授权功能暂时中断第一个应用程序的执行,保存第一个应用程序的临时数据,共享第二个应用程序所需的任何数据,并执行第二个应用程序,直到委派的任务被竞争。 然后,第一个应用程序检索保存的数据并完成其执行。 当多个代理发生时,委托器堆栈用于跟踪委托者的身份。 AAM模型允许在应用程序之间传输数据时具有高水平的安全性。

    Method of using flash memory for storing metering data
    3.
    发明申请
    Method of using flash memory for storing metering data 审中-公开
    使用闪存存储计量数据的方法

    公开(公告)号:US20050036387A1

    公开(公告)日:2005-02-17

    申请号:US10949603

    申请日:2004-09-24

    摘要: A multi-segmented non-volatile flash memory structure is employed in combination with at least one associated memory structure for storing, updating, and preserving meter data. By initially storing meter data in the associated memory, meter data is buffered until either a predetermined amount of data is obtained or until power to the meter is disabled, at which point the stored meter data is copied into selected blocks of flash memory. The various locations for transferring data are respectively determined by flash pointers indicating which segments or blocks of flash memory to utilize. In some embodiments, the size of the associated memory structure corresponds to the size of each segment of flash memory to maximize data transfer when the associated memory structure is full and also to reduce the number of times the flash memory is written to, thus increasing the potential active lifespan of the flash memory.

    摘要翻译: 多分段非易失性闪速存储器结构与至少一个相关联的存储器结构组合使用,用于存储,更新和保存仪表数据。 通过初始地将仪表数据存储在相关联的存储器中,仪表数据被缓冲,直到获得预定量的数据或者直到电表的功率被禁用为止,此时存储的仪表数据被复制到所选择的闪存块中。 用于传送数据的各个位置分别由指示要使用的闪存的哪些片段或块的闪存指针确定。 在一些实施例中,相关联的存储器结构的大小对应于快闪存储器的每个段的大小,以在关联的存储器结构已满时最大化数据传输,并且还减少闪存写入的次数,从而增加 闪存的潜在有效寿命。