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    • 61. 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。
    • 62. 发明授权
    • Method for buffering receive packet in media access control for sensor network and apparatus for controlling buffering of receive packet
    • 用于缓冲传感器网络的媒体访问控制中的接收分组的方法和用于控制接收分组的缓冲的装置
    • US07929558B2
    • 2011-04-19
    • US11605925
    • 2006-11-29
    • Se-Han KimYong-Sun KimYoon-Mee DohCheol-Sig Pyo
    • Se-Han KimYong-Sun KimYoon-Mee DohCheol-Sig Pyo
    • H04L12/56
    • H04L47/10H04L47/14H04L47/30H04L47/36H04W28/14
    • Provided is a method for buffering a receive packet in a sensor node including a radio frequency (RF) transceiver, a media access control (MAC) hardware block and a micro controller unit (MCU). The method includes the steps of: a) if a packet is received from the RF transceiver, checking whether or not a packet which is pre-stored in a receive first in first out (FIFO) exists; b) if the pre-stored packet exists in the receive FIFO at step a), checking whether a length of the received packet is the same with the length of the pre-stored packet in the receive FIFO; c) if the length of the received packet is the same with the length of the pre-stored packet in the receive FIFO at the step b), increasing the number of packet which is included in header information, and buffering a physical payload in the receive FIFO; and d) if the pre-stored packet does not exist in the receive FIFO at the step a) nor the length of the received packet is the same with the length of the pre-stored packet in the receive FIFO, consecutively buffering the physical payload with the header in the receive FIFO.
    • 提供了一种用于在包括射频(RF)收发器,媒体访问控制(MAC)硬件块和微控制器单元(MCU)的传感器节点中缓冲接收分组的方法。 该方法包括以下步骤:a)如果从RF收发器接收到分组,则检查先存储在FIFO中的预先存储的分组是否存在; b)如果预先存储的分组在步骤a)存在于接收FIFO中,则检查所接收的分组的长度是否与接收FIFO中预先存储的分组的长度相同; c)如果接收到的分组的长度与在步骤b)的接收FIFO中的预先存储的分组的长度相同,则增加包含在报头信息中的分组的数量,并且缓存在 接收FIFO; 以及d)如果预先存储的分组在步骤a)处不存在于接收FIFO中,并且所接收的分组的长度与接收FIFO中预先存储的分组的长度相同,则连续缓冲物理有效载荷 接收FIFO中的标题。
    • 65. 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。
    • 67. 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。
    • 68. 发明申请
    • MATCHING SYSTEM AND METHOD FOR PREVENTING THE LOSS OF DATA BETWEEN LOW-POWER NETWORK AND NON-LOW-POWER NETWORK
    • 用于防止低功耗网络与非低功耗网络之间的数据丢失的匹配系统和方法
    • US20080129466A1
    • 2008-06-05
    • US11877784
    • 2007-10-24
    • Jae-Hong RuyBong-Soo KimCheol-Sig Pyo
    • Jae-Hong RuyBong-Soo KimCheol-Sig Pyo
    • G08B1/08
    • H04W16/14H04L47/10Y02D70/166Y02D70/26
    • There is provided a matching system for preventing the loss of data between a low-power network and a non-low-power network, the matching system including: an RF communication schedule management unit, installed in the low-power network side system, for managing a schedule of an RF communication period indicative of a data transmission period of the low-power network; a heterogeneous network communication schedule management unit, disposed in the non-low-power network side system, for creating a schedule to transmit data to the low-power network side system based on the RF communication period provided by the RF communication schedule management unit; and a heterogeneous network communication unit for transmitting the data to the low-power network side system depending on the schedule created by the heterogeneous network communication schedule management unit.
    • 提供了一种用于防止低功率网络和非低功率网络之间的数据丢失的匹配系统,所述匹配系统包括:安装在低功率网络侧系统中的RF通信进度管理单元,用于 管理指示低功率网络的数据传输周期的RF通信周期的调度; 设置在非低功率网络侧系统中的异构网络通信调度管理单元,用于基于由RF通信调度管理单元提供的RF通信期间,创建向低功率网络侧系统发送数据的调度; 以及用于根据异构网络通信调度管理单元创建的调度将数据发送到低功率网络侧系统的异构网络通信单元。
    • 69. 发明申请
    • Distributional alert system for disaster prevention utilizing ubiquitous sensor network
    • 使用无所不在的传感器网络进行防灾分布式警报系统
    • US20070103298A1
    • 2007-05-10
    • US11595456
    • 2006-11-09
    • Se-Han KimYoon-Mee DohCheol-Sig Pyo
    • Se-Han KimYoon-Mee DohCheol-Sig Pyo
    • G08B1/08
    • G08B25/009G08B25/10G08B27/005
    • Provided is a distributional alert system using a ubiquitous sensor network (USN). When a disaster occurs, the distributional alert system detects it in a sensor node, informs the area where the disaster occurs of danger through an actuator, such as siren, or informs a management system of the danger through a wired/wireless network. The distributional alert system includes: a first sensor node for generating sense data by sensing surroundings with a sensor therein, determining whether a disaster occurs by analyzing the sense data, and creating and transmitting emergency data based on the determination result, while forming a sensor network; and an alerting node for receiving emergency data from the first sensor node on the sensor network, and outputting disaster circumstantial information to a sensor field of the sensor network upon receipt of the emergency data.
    • 提供了使用普遍存在的传感器网络(USN)的分布式警报系统。 当发生灾难时,分布式警报系统会在传感器节点中检测到故障,通过执行器(如警笛)告知灾害发生的危险区域,或通过有线/无线网络通知管理系统危险。 所述分配警报系统包括:第一传感器节点,用于通过在其中传感器感测环境来产生感测数据;通过分析感测数据来确定是否发生灾难;以及在形成传感器网络的同时,基于确定结果创建并发送紧急数据 ; 以及用于从所述传感器网络上的所述第一传感器节点接收紧急数据的报警节点,并且在接收到所述紧急数据时将所述灾害环境信息输出到所述传感器网络的传感器场。