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    • 1. 发明授权
    • Efficient addressing in wireless hart protocol
    • 无线哈特协议中的高效寻址
    • US08570922B2
    • 2013-10-29
    • US12101043
    • 2008-04-10
    • Wallace A. Pratt, Jr.Mark J. NixonEric D. RotvoldRobin S. PramanikTomas P. Lennvall
    • Wallace A. Pratt, Jr.Mark J. NixonEric D. RotvoldRobin S. PramanikTomas P. Lennvall
    • H04W4/00H04L12/28
    • H04W84/10H04L12/66H04L29/12254H04L61/2038H04L67/12H04W8/26H04W92/10
    • A method of providing a wireless extension to a wired protocol for transferring data to and from a field device operating in a process control environment via a wired connection, wherein the wired protocol and the wireless extension to the wired protocol have at least one protocol layer in common includes associating a unique address consistent with an addressing scheme of the wired protocol with each of a plurality of wireless devices operating in the process control environment and forming a wireless network, such that a data packet is routed between two of the plurality of wireless devices based on the unique address; associating a network identifier with the plurality of wireless devices; forming, for each of the plurality of wireless devices, a global address including the respective unique address and the network identifier in accordance with a second addressing scheme; and providing access to an external host operating outside the wireless network to each of the plurality of wireless devices based on the global address associated with the wireless device specified at the external host.
    • 一种向有线协议提供无线扩展的方法,用于经由有线连接向在过程控制环境中操作的现场设备传送数据和从现场设备传送数据,其中有线协议和对有线协议的无线扩展具有至少一个协议层 通常包括将与有线协议的寻址方案一致的唯一地址与在过程控制环境中操作的多个无线设备中的每一个相关联并且形成无线网络,使得数据分组在多个无线设备中的两个之间路由 基于独特的地址; 将网络标识符与所述多个无线设备相关联; 根据第二寻址方案,为所述多个无线设备中的每一个形成包括相应的唯一地址和所述网络标识符的全局地址; 以及基于与在所述外部主机指定的所述无线设备相关联的全球地址,向所述多个无线设备中的每一个提供对在所述无线网络之外运行的外部主机的访问。
    • 7. 发明申请
    • Synchronizing Timeslots in a Wireless Communication Protocol
    • 在无线通信协议中同步时隙
    • US20090052429A1
    • 2009-02-26
    • US12101005
    • 2008-04-10
    • Wallace A. Pratt, JR.Mark J. NixonEric D. RotvoldRobin S. PramanikTomas P. LennvallYuri Zats
    • Wallace A. Pratt, JR.Mark J. NixonEric D. RotvoldRobin S. PramanikTomas P. LennvallYuri Zats
    • H04J3/06
    • G01D21/00H04W24/00H04W56/0015H04W56/002H04W80/00
    • A method for synchronizing communications in wireless mesh network operating in a process control environment and including a plurality of network devices includes defining a communication timeslot of a predetermined duration, wherein each of the plurality of network devices transmits or receives data only within the communication timeslot generating a network schedule including at least one superframe having repeating superframe cycles each having a number of communication timeslots sequentially numbered relative to a beginning of each cycle, the number of communication timeslots defining a length of the at least one superframe, maintaining an absolute slot number indicative of a number of communication timeslots scheduled since a start time of the wireless network, synchronizing each of the plurality of network devices with respect to a timing of an individual communication timeslot, and synchronizing each of the plurality of network devices with the network schedule based on the absolute slot number.
    • 一种在过程控制环境中操作并包括多个网络设备的无线网状网络中的通信同步的方法包括:定义预定持续时间的通信时隙,其中,所述多个网络设备中的每一个仅在所述通信时隙内产生或接收数据 网络调度包括至少一个具有重复超帧周期的超帧,每个超帧具有相对于每个周期的开始顺序编号的多个通信时隙,定义所述至少一个超帧的长度的通信时隙的数量,维持绝对时隙号指示 从无线网络的开始时间安排的多个通信时隙中的多个网络设备中的每一个相对于各个通信时隙的定时同步,并且基于多个网络设备中的每一个基于 绝对 ollot槽号。