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    • 51. 发明申请
    • Apparatus and Method for Computing Location of a Moving Beacon Using Received Signal Strength and Multi-Frequencies
    • 使用接收信号强度和多频率计算移动信标位置的装置和方法
    • US20080316104A1
    • 2008-12-25
    • US12096780
    • 2006-12-08
    • Nak-Seon SeongChoon-Sik LimCheol-Sig PyoJong-Suk Chae
    • Nak-Seon SeongChoon-Sik LimCheol-Sig PyoJong-Suk Chae
    • H04B7/24
    • G01S5/10
    • Provided is an apparatus and method for computing the location of a radio beacon by using received signal strength (RSS) and multiple frequencies. The apparatus and method of the present invention computes the location of a radio beacon without limitation in distance by using multiple frequencies and received signal strength to resolve the problem of phase ambiguity. A radio beacon location computing system includes a plurality of base stations configured to receive signals of multiple frequencies transmitted from the radio beacon, and detect and output phase differences and received signal strength; and a location computing server configured to receive the phase differences and the received signal strength outputted from the respective base stations, acquire calculation distances based on the phase differences, remove phase ambiguity from the calculation distances based on the received signal strength, and compute the location of the radio beacon.
    • 提供了一种通过使用接收信号强度(RSS)和多个频率来计算无线电信标的位置的装置和方法。 本发明的装置和方法通过使用多个频率和接收信号强度来计算无线电信标的位置而不限制距离,以解决相位模糊问题。 无线电信标位置计算系统包括:多个基站,被配置为接收从无线电信标发送的多个频率的信号,并检测和输出相位差和接收信号强度; 以及位置计算服务器,被配置为接收从各个基站输出的相位差和接收信号强度,基于相位差获取计算距离,基于接收到的信号强度从计算距离中消除相位模糊度,并且计算位置 的无线电信标。
    • 53. 发明授权
    • Apparatus and method for computing location of a moving beacon using time difference of arrival and multi-frequencies
    • 使用到达时间和多频率计算移动信标位置的装置和方法
    • US08026850B2
    • 2011-09-27
    • US12096777
    • 2006-12-08
    • Nak-Seon SeongChoon-Sik LimCheol-Sig PyoJong-Suk Chae
    • Nak-Seon SeongChoon-Sik LimCheol-Sig PyoJong-Suk Chae
    • G01S1/24
    • G01S5/06G01S5/14H04W64/00
    • Provided is an apparatus and method for computing the location of a radio beacon by using Time Difference Of Arrival (TDOA) and multiple frequencies. The apparatus and method of the present invention compute the location of a radio beacon without limitation in distance by using multiple frequencies and time difference of arrival to resolve the problem of phase ambiguity. A radio beacon location computing system includes a plurality of base stations configured to receive signals of multiple frequencies transmitted from the radio beacon, and detect and output phase differences and arrival time; and a location computing server configured to receive the phase differences and the arrival time outputted from the respective base stations, acquire calculation distances based on the phase differences, remove phase ambiguity from the calculation distances based on the arrival time, and compute the location of the radio beacon.
    • 提供了一种通过使用到达时差(TDOA)和多个频率来计算无线电信标的位置的装置和方法。 本发明的装置和方法通过使用多个频率和到达时间差来计算无线电信标的位置,而不限于距离,以解决相位模糊问题。 无线电信标位置计算系统包括多个基站,被配置为接收从无线电信标发送的多个频率的信号,并且检测和输出相位差和到达时间; 以及位置计算服务器,被配置为接收从各个基站输出的相位差和到达时间,基于相位差获取计算距离,基于到达时间从计算距离中消除相位模糊度,并且计算 无线电信标。
    • 54. 发明授权
    • MAC forwarding method for multi-hop routing in communication system between vehicles
    • 车辆通信系统中多跳路由的MAC转发方法
    • US07933271B2
    • 2011-04-26
    • US11487534
    • 2006-07-13
    • Chang-Sub ShinHyun LeeHan-Byeog ChoHyuk-Joon LeeCheol-Sig PyoJong-Suk Chae
    • Chang-Sub ShinHyun LeeHan-Byeog ChoHyuk-Joon LeeCheol-Sig PyoJong-Suk Chae
    • H04L12/28H04B7/00H04Q7/00H04Q7/20
    • H04W40/26
    • Provided is a Media Access Control (MAC) forwarding method for multi-hop routing in a communication system between vehicles. The method includes the steps of: a) receiving a frame from all nodes and checking whether there are duplicate frames; b) partly updating forwarding cache table (FCT) information, or updating SNT information and checking whether a destination address is a corresponding node; c) updating the FCT information, transmitting an Ack signal and transferring the frame to the upper layer, or searching whether the destination address is registered as “d_addr”; d) updating the FCT information and transmitting a delay ACK frame or checking whether the transmitted frame is a flooding frame; and e) updating the FCT information, checking whether the other node does not transmit the “d_ack” and inserting a flooding frame, otherwise, updating the FCT information and abandoning the frame.
    • 提供了一种用于车辆之间的通信系统中的多跳路由的媒体接入控制(MAC)转发方法。 该方法包括以下步骤:a)从所有节点接收帧并检查是否存在重复帧; b)部分更新转发高速缓存表(FCT)信息,或更新SNT信息并检查目的地址是否是对应节点; c)更新FCT信息,发送Ack信号并将帧传送到上层,或者搜索目的地地址是否被注册为“d_addr”; d)更新FCT信息并发送延迟ACK帧或检查所发送的帧是否是泛洪帧; 以及e)更新FCT信息,检查其他节点是否不发送“d_ack”并插入洪泛帧,否则更新FCT信息并放弃该帧。
    • 57. 发明申请
    • METHOD OF PREVENTING DATA COLLOSIONS IN BEACON-ENABLED ZIGBEE SYSTEM HAVING TREE ROUTING SCHEME
    • 在具有树路由方案的BEACON-EIBBLED ZIGBEE系统中防止数据聚合的方法
    • US20100110888A1
    • 2010-05-06
    • US12532826
    • 2007-10-24
    • Jongjun ParkJong-Oh LeeHoon JeongSun-Joong KimCheol-Sig PyoJong-Suk Chae
    • Jongjun ParkJong-Oh LeeHoon JeongSun-Joong KimCheol-Sig PyoJong-Suk Chae
    • H04L1/00
    • H04W74/0816H04W84/18
    • Provided is a method of preventing a data collision that occurs when two or more child nodes simultaneously transmit data to a parent node in a ZigBee network having a tree routing scheme and operating in a beacon mode. In the ZigBee system having the tree routing scheme and operating in the beacon mode, data communication to the parent node is performed in a beacon frame of the parent node. Here, when several child nodes exist under a single parent node, the child nodes transmit data to the parent node at the moment of receiving the beacon of the parent node, so that the data collision may occur when the child nodes simultaneously transmit the data to the parent node in the beacon frame of the parent node. In the method of preventing a data collision, each of the two or more child nodes is set to wait for its guard time (delay time) when transmitting data to the parent node to induce a normal slotted carrier sense multiple access with collision avoidance (CSMA-CA) operation. Therefore, the data collision can be prevented.
    • 提供了一种防止当两个或多个子节点同时向具有树路由方案并且以信标模式操作的ZigBee网络中的父节点发送数据时发生的数据冲突的方法。 在具有树路由方案并在信标模式下操作的ZigBee系统中,在父节点的信标帧中执行到父节点的数据通信。 这里,当在单个父节点下存在几个子节点时,子节点在接收到父节点的信标的时刻向父节点发送数据,使得当子节点同时发送数据时可能发生数据冲突 父节点的信标帧中的父节点。 在防止数据冲突的方法中,将两个或多个子节点中的每一个设置为在向父节点发送数据时等待其保护时间(延迟时间),以引起具有防冲突的正常时隙载波侦听多路访问(CSMA -CA)操作。 因此,可以防止数据冲突。
    • 59. 发明申请
    • Apparatus and Method for Computing Location of a Moving Beacon Using Time Difference of Arrival and Multi-Frequencies
    • 使用到达和多频率的时差计算移动信标位置的装置和方法
    • US20080291089A1
    • 2008-11-27
    • US12096777
    • 2006-12-08
    • Nak-Seon SeongChoon-Sik LimCheol-Sig PyoJong-Suk Chae
    • Nak-Seon SeongChoon-Sik LimCheol-Sig PyoJong-Suk Chae
    • G01S1/02
    • G01S5/06G01S5/14H04W64/00
    • Provided is an apparatus and method for computing the location of a radio beacon by using Time Difference Of Arrival (TDOA) and multiple frequencies. The apparatus and method of the present invention compute the location of a radio beacon without limitation in distance by using multiple frequencies and time difference of arrival to resolve the problem of phase ambiguity. A radio beacon location computing system includes a plurality of base stations configured to receive signals of multiple frequencies transmitted from the radio beacon, and detect and output phase differences and arrival time; and a location computing server configured to receive the phase differences and the arrival time outputted from the respective base stations, acquire calculation distances based on the phase differences, remove phase ambiguity from the calculation distances based on the arrival time, and compute the location of the radio beacon.
    • 提供了一种通过使用到达时差(TDOA)和多个频率来计算无线电信标的位置的装置和方法。 本发明的装置和方法通过使用多个频率和到达时间差来计算无线电信标的位置,而不限于距离,以解决相位模糊问题。 无线电信标位置计算系统包括多个基站,被配置为接收从无线电信标发送的多个频率的信号,并且检测和输出相位差和到达时间; 以及位置计算服务器,被配置为接收从各个基站输出的相位差和到达时间,基于相位差获取计算距离,基于到达时间从计算距离中消除相位模糊度,并且计算 无线电信标。