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    • 6. 发明授权
    • Handover method for next generation mobile communication system having overlapping area
    • 具有重叠区域的下一代移动通信系统的切换方法
    • US07353029B2
    • 2008-04-01
    • US11177037
    • 2005-07-08
    • Young-June ChoiMi-Sun DoSeung-Young ParkSung-Hyun ChoSae-Woong BahkNeung-Hyung Lee
    • Young-June ChoiMi-Sun DoSeung-Young ParkSung-Hyun ChoSae-Woong BahkNeung-Hyung Lee
    • H04Q7/20
    • H04W36/12H04W74/00H04W80/00
    • Disclosed is a handover method for an IP-based next generation mobile communication system. With a handover method including 1) determining whether or not a predetermined mobile terminal goes into the overlapping area; 2) starting a Layer 3 (L3) handover operation between the neighboring access routers as the mobile terminal goes into the overlapping area; 3) if the Layer 3 handover operation between the neighboring access routers is completed, establishing a data path for the mobile terminal to pass through an access router after the Layer 3 handover; 4) if the mobile terminal leaves a cell area including the mobile terminal in steps 2) and 3), performing by the mobile terminal Layer 2 handover between cells and receiving by the mobile terminal data through a cell base station after the Layer 2 handover and an access router before the Layer 3 handover; and 5) if the mobile terminal leaves a cell area including the mobile terminal after step 3), performing by the mobile terminal Layer 2 handover between cells and receiving by the mobile terminal data through a cell base station after the Layer 2 handover and an access router after the Layer 3 handover.
    • 公开了一种用于基于IP的下一代移动通信系统的切换方法。 一种切换方法,包括:1)确定预定的移动终端是否进入重叠区域; 2)当移动终端进入重叠区域时,开始相邻接入路由器之间的第3层(L3)切换操作; 3)如果相邻接入路由器之间的第3层切换操作完成,则在第3层切换之后建立移动终端通过接入路由器的数据路径; 4)如果移动终端在步骤2)和3)中离开包括移动终端的小区区域,则由移动终端执行第2层小区之间的切换,并且在第2层切换之后由移动终端通过小区基站接收数据;以及 第三层交换之前的接入路由器; 以及5)如果移动终端在步骤3之后离开包括移动终端的小区区域),则由移动终端执行第2层小区之间的切换,并且在第2层切换之后由移动终端通过小区基站接收数据和接入 路由器在第3层切换之后。
    • 7. 发明申请
    • Random access method in multi-cell OFDMA networks
    • 多小区OFDMA网络中的随机接入方法
    • US20060045047A1
    • 2006-03-02
    • US11212272
    • 2005-08-26
    • Young-June ChoiSae-Woong BahkJung-Hyon JunSang-Boh Yun
    • Young-June ChoiSae-Woong BahkJung-Hyon JunSang-Boh Yun
    • H04Q7/00
    • H04L23/02H04L5/0007H04L5/0053H04W74/0866H04W74/0883
    • Disclosed is an upstream access method in an Orthogonal Frequency Division Multiple Access (OFDMA)-based mobile communication system in which a random access method in an OFDMA network includes randomly selecting, by each subscriber device, one of a plurality uplink random access channels, if a random access request to the OFDMA network is transmitted by each subscriber device, accessing through the selected channel if a collision has not occurred in the selected channel, randomly selecting one of the uplink random access channels, if a collision has occurred in the selected channel, and if the number of retries for channel selection is less than a predetermined value, and determining whether a has collision has occurred, accessing through a finally selected channel, if it is determined that a collision has occurred; and randomly selecting one of the uplink random access channels if it is determined that a collision has occurred.
    • 公开了一种基于正交频分多址(OFDMA)的移动通信系统中的上行接入方法,其中OFDMA网络中的随机接入方法包括:由每个用户设备随机选择多个上行随机接入信道之一,如果 如果所选择的信道中已经发生冲突,则每个用户设备发送对OFDMA网络的随机接入请求,如果所选择的信道中没有发生冲突,则随机选择上行链路随机接入信道中的一个,通过所选择的信道进行接入 并且如果用于频道选择的重试次数小于预定值,并且确定是否已经发生冲突,则通过最终选择的频道进行访问,如果确定已经发生了冲突; 并且如果确定已经发生冲突,则随机选择一个上行链路随机接入信道。
    • 8. 发明授权
    • Method for wireless multi-hop network
    • 无线多跳网络的方法
    • US08169942B2
    • 2012-05-01
    • US12548637
    • 2009-08-27
    • Sae-Woong BahkKyong-Tak Cho
    • Sae-Woong BahkKyong-Tak Cho
    • H04W52/02
    • H04W52/0216H04W84/18Y02D70/22
    • Technology for a wireless multi-hop network is disclosed. a plurality of nodes in the wireless multi-hop network are synchronized to a period sequentially including a first interval and a second interval and are in an active state at the start time of the first interval. a node transmits a control frame at the start time of the first interval, the control frame indicating that data will be transmitted in the second interval, and then transitions to a sleep state which is maintained until a wake-up time in response to determining that the control frame has been successfully received by a next hop node. The wake-up time is a point in time when a node transitions to an active state to transmit the data and is present in the second interval.
    • 公开了一种无线多跳网络技术。 无线多跳网络中的多个节点与包括第一间隔和第二间隔的顺序同步,并且在第一间隔的开始时处于活动状态。 节点在第一间隔的开始时间发送控制帧,指示数据将在第二间隔中发送的控制帧,然后转变为休眠状态,响应于确定该休眠状态而保持直到唤醒时间 控制帧已被下一跳节点成功接收。 唤醒时间是当节点转换到活动状态以发送数据并且存在于第二间隔中的时间点。
    • 10. 发明申请
    • Apparatus for displaying network status
    • 显示网络状态的设备
    • US20060140127A1
    • 2006-06-29
    • US11025722
    • 2004-12-29
    • Hee-Jo LeeHyo-Gon KimSae-Woong Bahk
    • Hee-Jo LeeHyo-Gon KimSae-Woong Bahk
    • H04L12/26H04L12/56
    • H04L63/1425H04L43/045H04L43/18H04L63/1441
    • An apparatus for displaying network status includes a network traffic collection unit, a network status display unit and a first attack type determination unit. The network traffic collection unit analyzes packets collected from an external communication network, and outputs connection information including a source Internet Protocol (IP) address, a destination IP address and a destination port number. The network status display unit receives the connection information transmitted from the network traffic collection unit for a predetermined period, and displays the connection information in a coordinate point data form on a three-dimensional rectangular coordinate system whose three axes are assigned to a source IP address, a destination IP address and a destination port number, respectively. The first attack type determination unit detects the coordinate point data displayed on the network status display unit as a line or plane through image processing, and determines an attack type according to the type of the line or plane.
    • 一种用于显示网络状态的装置包括网络流量收集单元,网络状态显示单元和第一攻击类型确定单元。 网络流量收集单元分析从外部通信网络收集的数据包,并输出包括源IP地址,目的地IP地址和目的地端口号的连接信息。 网络状态显示单元接收从网络流量采集单元发送的连接信息一段预定的时间,并将坐标点数据形式的连接信息显示在三维直角坐标系上,三维直角坐标系的三轴被分配给源IP地址 ,目的IP地址和目的端口号。 第一攻击类型确定单元通过图像处理检测作为线路或平面的网络状态显示单元上显示的坐标点数据,并根据线或平面的类型来确定攻击类型。