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    • 11. 发明申请
    • METHOD AND MODULE FOR ESTIMATING FREQUENCY BIAS IN A DIGITAL-TELECOMMUNICATIONS SYSTEM
    • 在数字电信系统中估计频率偏差的方法和模块
    • US20140219325A1
    • 2014-08-07
    • US14129579
    • 2012-07-05
    • Cédric ArtigueChristophe FourtetMarc Vertes
    • Cédric ArtigueChristophe FourtetMarc Vertes
    • H04L25/02
    • H04L25/022H04L27/2338H04L2027/0067
    • The invention relates to a method for estimating frequency bias negatively affecting a digital signal representative of a symbol frame, wherein said method comprises the steps of: generating the digital signal at a sampling period Te that is shorter than a predefined period of each of the symbols of the frame; calculating values for a plurality of pairs of samples of the digital signal, each value being representative of a phase difference between the samples of a pair; estimating the frequency bias negatively affecting the digital signal on the basis of the values calculated for Np pairs of samples selected such that a plurality of said Np pairs belong strictly to a single symbol in the frame. The present invention also relates to a module for implementing the estimation method, as well as to a telecommunication method and system.
    • 本发明涉及一种用于估计对表示符号帧的数字信号有负面影响的频率偏差的方法,其中所述方法包括以下步骤:以比每个符号的预定周期短的采样周期Te产生数字信号 的框架 计算数字信号的多对采样对的值,每个值表示一对样本之间的相位差; 基于为所选择的Np个样本对计算的值估计对数字信号负面影响的频率偏移,使得多个所述Np对严格地属于帧中的单个符号。 本发明还涉及一种用于实现估计方法的模块,以及电信方法和系统。
    • 13. 发明申请
    • Method for System Call Interception in User Space
    • 用户空间中系统呼叫拦截的方法
    • US20080250400A1
    • 2008-10-09
    • US11867296
    • 2007-10-04
    • Marc Vertes
    • Marc Vertes
    • G06F9/45
    • G06F9/4486
    • A method, and system for intercepting a system call performed by a process and for executing processing in relation with the intercepted system call from user space. The method comprises a first step for setting up, in the executing process, a signal handler performing processing in relation with an interception of a system call in the executing process upon reception of a specific signal. The executing process performs a ptrace system call with a new request, the self ptrace, which sets, in the task descriptor of the executing process, the system trace flag corresponding to the existing system trace ptrace request and set a new flag, the pt_self flag. When a system call is performed in the executing process, a new system call trace is executed testing if the pt_self flag is set. If the pt_self flag is set a specific signal is sent to the executing process itself and the handler which has been set up is executed in user space.
    • 一种用于截取由进程执行的系统调用并用于执行与从用户空间截取的系统调用相关的处理的方法和系统。 该方法包括第一步骤,在执行处理中,在接收到特定信号时,在执行处理中建立与拦截系统调用相关的处理的信号处理程序。 执行过程使用新请求执行ptrace系统调用,self ptrace在执行进程的任务描述符中设置与现有系统跟踪ptrace请求对应的系统跟踪标志,并设置新的标志,pt_self标志 。 当在执行过程中执行系统调用时,如果设置了pt_self标志,则会执行新的系统调用跟踪。 如果设置了pt_self标志,则将特定信号发送到执行过程本身,并且已经设置的处理程序在用户空间中执行。
    • 14. 发明申请
    • Predictive Method for Managing Logging or Replaying Non-Deterministic Operations within the Execution of an Application Process
    • 在执行应用程序过程中管理记录或重放非确定性操作的预测方法
    • US20080086730A1
    • 2008-04-10
    • US11813960
    • 2006-01-20
    • Marc Vertes
    • Marc Vertes
    • G06F9/46
    • G06F11/3476G06F11/1438G06F2201/86
    • This invention relates to a management method, more particularly by logging and replay, for software operations performed during the execution of an application process executed on a computer. This method applies in particular to internal operations sending a result datum to the managed process, and comprises the following steps: carrying out a deterministic software processing, termed prediction function (FH), based on the state of a managed process or of the application (AOP, ASB), to provide a predicted result (RP) for said operation; comparative test to establish whether the value of the predicted result (RP) corresponds or does not correspond to the value of the actual result (DR, RRJ); performance of a complementary management phase (CH, DH) of said managed operation, this complementary management depending on the result of the preceding test.
    • 本发明涉及管理方法,更具体地说是通过记录和重播用于在执行在计算机上执行的应用程序过程中执行的软件操作。 该方法特别适用于向被管理进程发送结果数据的内部操作,并且包括以下步骤:基于被管理进程或应用程序的状态执行称为预测功能(FH)的确定性软件处理 AOP,ASB),以提供用于所述操作的预测结果(RP); 比较测试,以确定预测结果(RP)的值是否对应于或不对应于实际结果(DR,RRJ)的值; 执行所述管理操作的补充管理阶段(CH,DH),这种补充管理取决于上述测试的结果。
    • 15. 发明授权
    • Optimizing deterministic event record and replay operations
    • 优化确定性事件记录和重放操作
    • US08370841B2
    • 2013-02-05
    • US12275926
    • 2008-11-21
    • Dinesh SubhravetiPhilippe BergheaudMarc Vertes
    • Dinesh SubhravetiPhilippe BergheaudMarc Vertes
    • G06F9/46G06F12/00
    • G06F11/203G06F11/2033G06F11/2043
    • Mechanisms for managing task events during the scheduling period of a task executing on a processor. Only events of specific portions of the scheduling period are logged, wherein a first shared resource access has been granted for the task, this portion of the scheduling period involving gathering all the non-deterministic events which cannot be replayed by simple task re-execution. Other independent non-deterministic event records are still logged as usual when they occur out of the portion of the scheduling period for which a record has been created. This limits the number of logged events during a recording session of an application and limits the frequency of events to transmit from the production machine to the replay machine.
    • 在处理器上执行的任务的调度期间管理任务事件的机制。 只记录调度周期的特定部分的事件,其中已经为该任务授予了第一共享资源访问,该调度周期的该部分涉及收集所有不能通过简单的任务重新执行重放的非确定性事件。 其他独立的非确定性事件记录在出现在创建记录的调度周期的部分之前仍然照常记录。 这限制了在应用程序的记录会话期间记录事件的数量,并限制了从生产计算机传输到重播机器的事件的频率。
    • 16. 发明授权
    • Method for system call interception in user space
    • 用户空间中系统调用拦截的方法
    • US08230399B2
    • 2012-07-24
    • US11867296
    • 2007-10-04
    • Marc Vertes
    • Marc Vertes
    • G06F9/44G06F11/00
    • G06F9/4486
    • A method is provided which includes: facilitating intercepting a system call in user space by setting up signal handler code for executing operations related to the system call, and performing in the executing process, before execution of the system call, a SELF PTRACE request which sets system and self trace flags in the operating system kernel, wherein the self trace flag facilitates self-notifying the executing process whenever the executing process executes the system call; and intercepting the system call, including: verifying by the kernel that the system and self trace flags are set; saving and sending a signal to the signal handler conveying system call information to the user space; starting execution in user space of the signal handler; and at the end of signal handler execution, re-starting execution of the executing process, while providing system call return information to code of the executing process making the system call.
    • 提供了一种方法,其包括:通过设置用于执行与系统调用相关的操作的信号处理程序代码来简化在用户空间中的系统调用,并且在执行系统调用之前执行执行过程,设置SELF PTRACE请求 系统和自我跟踪标志,其中,只要执行过程执行系统调用,自我跟踪标志便于自动通知执行过程; 并拦截系统调用,包括:内核验证系统和自我跟踪标志的设置; 将信号发送到向用户空间传送系统呼叫信息的信号处理器; 在信号处理程序的用户空间中开始执行; 并且在信号处理程序执行结束时,重新启动执行过程的执行,同时向进行系统调用的执行过程的代码提供系统调用返回信息。
    • 17. 发明授权
    • Predictive method for managing logging or replaying non-deterministic operations within the execution of an application process
    • 在应用程序执行过程中管理日志记录或重放非确定性操作的预测方法
    • US08132190B2
    • 2012-03-06
    • US11813960
    • 2006-01-20
    • Marc Vertes
    • Marc Vertes
    • G06F3/00G06F9/44G06F9/46G06F13/00
    • G06F11/3476G06F11/1438G06F2201/86
    • This invention relates to a management method, more particularly by logging and replay, for software operations performed during the execution of an application process executed on a computer. The method applies in particular to internal operations sending a result datum to the managed process, and comprises the following steps: —carrying out a deterministic software processing, termed prediction function (FH), based on the state of a managed process or of the application (AOP, ASB), to provide a predict result (RP) for said operation; —comparative test to establish whether the value of the predict result (RP) corresponds or does not correspond to the value of the actual result (DR, RRJ); —performance of a complementary management depending on the result of the preceding test.
    • 本发明涉及管理方法,更具体地说是通过记录和重播用于在执行在计算机上执行的应用程序过程中执行的软件操作。 该方法特别适用于向被管理进程发送结果数据的内部操作,并且包括以下步骤: - 基于被管理进程或应用程序的状态进行称为预测功能(FH)的确定性软件处理 (AOP,ASB),为所述操作提供预测结果(RP); 确定预测结果(RP)的值是否对应于实际结果(DR,RRJ)的值的对比测试; - 根据上述测试的结果执行补充管理。
    • 18. 发明申请
    • Non-Intrusive Method for Replaying Internal Events In An Application Process, And System Implementing This Method
    • 非侵入性方法在应用过程中重放内部事件,系统实现该方法
    • US20080046696A1
    • 2008-02-21
    • US11813979
    • 2006-01-20
    • Marc Vertes
    • Marc Vertes
    • G06F11/34
    • G06F11/3476G06F11/1438G06F11/1471G06F2201/86
    • This invention relates to a method for replaying, from a log file, internal events within a process belonging to a software application in a network. This method comprising the following steps: executing at least one replay instruction by the target process, initiating a replayed operation (EVI) that returns, to this target process (PB1), at least one result datum obtained (RRJ) by this replayed operation; performing, by a software agent (PRI) external to the restart process, a forcing process (7) comprising a forcing operation upon the target process, instead and in place of the replay result datum (RRJ), of a forced datum, (RLi), extracted from logging data. Advantageously, the target process (PB1) executes the replay instruction of its own initiative from its executable file (EXE; FIG. 7).
    • 本发明涉及一种从日志文件重播属于网络中的软件应用的进程内的内部事件的方法。 该方法包括以下步骤:通过目标处理执行至少一个重放指令,启动通过该重放操作返回到该目标处理(PB1)至少一个获得的结果数据(RRJ)的重放操作(EVI) ; 通过由重新启动过程外部的软件代理(PRI)来执行强制过程(7),该强制过程(7)包括强制基准的目标过程(而不是代替重播结果数据(RRJ))的强制操作(RLi ),从日志数据中提取。 有利地,目标进程(PB 1)从其可执行文件(EXE;图7)执行其主动的重放指令。