公开(公告)号：US07916650B2

公开(公告)日：2011-03-29

申请号：US12321532

申请日：2009-01-22

申请人： Eui Jik Kim ,  Sun Gi Kim ,  Hyo Hyun Choi ,  Jeong Geun Kim

发明人： Eui Jik Kim ,  Sun Gi Kim ,  Hyo Hyun Choi ,  Jeong Geun Kim

IPC分类号： G01R31/08

CPC分类号： H04W74/085 ,  H04L43/0811 ,  H04W84/18 ,  Y02D70/00 ,  Y02D70/142 ,  Y02D70/144 ,  Y02D70/162

摘要： A wireless sensor network and data transmission method thereof provides for improving channel access efficiency and energy saving effect by using inventive carrier sensing mechanism. The data transmission method includes assessing a channel after initializing, when a packet to be transmitted is generated, a number of carrier sensing attempts (Ns) and a backoff value (W); determining, when the channel availability is assessed to be idle, whether W reaches 0; transmitting the packet if W reaches 0; and reassessing, if W does not reach 0, the channel after a duration corresponding W/(Ns-1) slot.

摘要翻译： 无线传感器网络及其数据传输方法通过使用本发明的载波传感机制来提高信道接入效率和节能效果。 数据传输方法包括：当要发送的分组被生成时，初始化之后的信道，多个载波感测尝试（Ns）和退避值（W）; 确定当信道可用性被评估为空闲时，W是否达到0; 如果W达到0，则发送该数据包; 并且如果W不达到0，则在经过持续时间对应的W /（Ns-1）时隙之后重新评估。

公开(公告)号：US20090207748A1

公开(公告)日：2009-08-20

申请号：US12370683

申请日：2009-02-13

申请人： Hyo Hyun Choi ,  Sun Gi Kim ,  Lynn Choi ,  Sang Hoon Lee

发明人： Hyo Hyun Choi ,  Sun Gi Kim ,  Lynn Choi ,  Sang Hoon Lee

IPC分类号： H04W84/18 ,  H04L12/26

CPC分类号： H04L43/0811 ,  H04W40/16 ,  H04W40/18

摘要： A communication method and apparatus is disclosed that uses a received signal strength indicator (RSSI). In a sensor network including a plurality of nodes, a first node of the plurality of nodes receives a signal transmitted from a second node of the plurality of nodes, at least once. The first node also manages a link state with the second node according to the RSSI of the received signal. Therefore, the first node can receive signals from the plurality of nodes and then predict whether the second node moves. The first node can also predict a link state after the second node is moved so that communication can be performed through a link in a good state. Accordingly, the communication quality and the network performance of a network are enhanced.

摘要翻译： 公开了一种使用接收信号强度指示器（RSSI）的通信方法和装置。 在包括多个节点的传感器网络中，多个节点中的第一节点至少接收一次从多个节点的第二节点发送的信号。 第一节点还根据接收到的信号的RSSI来管理与第二节点的链路状态。 因此，第一节点可以从多个节点接收信号，然后预测第二节点是否移动。 第一节点还可以在移动第二节点之后预测链路状态，使得可以通过处于良好状态的链路执行通信。 因此，提高了网络的通信质量和网络性能。

公开(公告)号：US20090128412A1

公开(公告)日：2009-05-21

申请号：US12270912

申请日：2008-11-14

申请人： Je Hyok RYU ,  Sun Gi Kim ,  Hyo Hyun Choi ,  Bum Jin Kim ,  Sae Young Ahn ,  Sun Shin An

发明人： Je Hyok RYU ,  Sun Gi Kim ,  Hyo Hyun Choi ,  Bum Jin Kim ,  Sae Young Ahn ,  Sun Shin An

IPC分类号： G01S5/02

CPC分类号： G01S5/14 ,  G01S5/0236 ,  G01S5/0252

摘要： For a sensor network having reference nodes and sensor nodes, A method and apparatus using a distance determining algorithm for a sensor network having reference nodes and sensor nodes. A distance determining algorithm is executed to determine an adequate distance between reference nodes within a preset error range, and a position location table is created. A sensor node sends a location information request to reference nodes, receives the position location table and location information from the reference nodes, and computes the coordinates of its position. Alternatively, without requesting transmission of the position location table, the sensor node may receive calculated coordinates of its position directly from a reference node.

摘要翻译： 对于具有参考节点和传感器节点的传感器网络，使用具有参考节点和传感器节点的传感器网络的距离确定算法的方法和装置。 执行距离确定算法以确定在预设误差范围内的参考节点之间的足够距离，并且创建位置位置表。 传感器节点向参考节点发送位置信息请求，从参考节点接收位置位置表和位置信息，并计算其位置的坐标。 或者，在不要求发送位置位置表的情况下，传感器节点可以直接从参考节点接收其位置的计算坐标。

公开(公告)号：US08619707B2

公开(公告)日：2013-12-31

申请号：US12626395

申请日：2009-11-25

申请人： Seoung-Bok Lee ,  Hyo Hyun Choi

发明人： Seoung-Bok Lee ,  Hyo Hyun Choi

IPC分类号： H04W4/00

CPC分类号： H04W8/26 ,  H04L41/06 ,  H04L43/08 ,  H04L43/16 ,  H04W84/18 ,  Y02D70/144 ,  Y02D70/162

摘要： Disclosed is a method of managing an allocated address through a coordinator in a Low Power Wireless Personal Area Network (LoWPAN) including receiving a first beacon data request message from a mobile node that has entered into a communication region of the coordinator; measuring a Link Quality Indication (LQI) of the first beacon data request message, setting the measured LQI as a minimum communication threshold value with the mobile node, and setting an alarm region that is an LQI range for sensing whether the mobile node leaves the communication region; if a second beacon data request message is received from the mobile node, measuring an LQI of the second beacon data request message, and checking whether the measured LQI of the second beacon data request message is included in the alarm region; and if the LQI is included in the alarm region, periodically transmitting a node alive check message to the mobile node.

摘要翻译： 公开了一种通过低功率无线个人区域网络（LoWPAN）中的协调器来管理分配的地址的方法，包括从已经进入协调器的通信区域的移动节点接收第一信标数据请求消息; 测量所述第一信标数据请求消息的链路质量指示（LQI），将所测量的LQI设置为与所述移动节点的最小通信阈值，以及设置作为用于检测所述移动节点是否离开所述通信的LQI范围的报警区域 地区; 如果从所述移动节点接收到第二信标数据请求消息，则测量所述第二信标数据请求消息的LQI，并且检查所述第二信标数据请求消息的所测量的LQI是否包括在所述报警区域中; 并且如果LQI被包括在报警区域中，则周期性地向移动节点发送节点活动检查消息。

公开(公告)号：US08335155B2

公开(公告)日：2012-12-18

申请号：US12334706

申请日：2008-12-15

申请人： Eui Jik Kim ,  Sun Gi Kim ,  Hyo Hyun Choi ,  Jeong Geun Kim

发明人： Eui Jik Kim ,  Sun Gi Kim ,  Hyo Hyun Choi ,  Jeong Geun Kim

IPC分类号： G01R31/08

CPC分类号： H04W74/0833 ,  H04W84/18 ,  Y02D70/142 ,  Y02D70/144 ,  Y02D70/162 ,  Y02D70/22

摘要： A packet transmission method for a WPAN that for alleviating traffic concentration in an active period and improving network throughput by controlling packet transmission timing in the active period. A packet transmission method for a wireless personal area network including a coordinator operating with a specific duty cycle and a plurality of devices includes determining, when a packet is generated, whether there is another packet waiting to be sent; determining, if there is no other packet waiting to be sent, whether the network is in an inactive period; setting, when network is in an inactive period, a backoff time; and sending the packet when the backoff time has expired. The packet transmission method controls an initial backoff value adaptively to a duty cycle of the network.

摘要翻译： 一种WPAN的分组发送方法，用于通过控制活动期间的分组发送定时来缓解活动期间的业务集中，提高网络吞吐量。 一种用于包括以特定占空比操作的协调器和多个设备的无线个域网的分组传输方法包括：确定何时产生分组，是否存在等待发送的另一分组; 确定如果没有其他分组等待发送，则网络是否处于非活动时段; 当网络处于非活动期间时，设置退避时间; 并且当退避时间到期时发送分组。 分组传输方法自适应地控制网络的占空比的初始后退值。

公开(公告)号：US20090207747A1

公开(公告)日：2009-08-20

申请号：US12321532

申请日：2009-01-22

申请人： Eui Jik Kim ,  Sun Gi Kim ,  Hyo Hyun Choi ,  Jeong Geun Kim

发明人： Eui Jik Kim ,  Sun Gi Kim ,  Hyo Hyun Choi ,  Jeong Geun Kim

IPC分类号： H04W74/00 ,  H04L12/26

CPC分类号： H04W74/085 ,  H04L43/0811 ,  H04W84/18 ,  Y02D70/00 ,  Y02D70/142 ,  Y02D70/144 ,  Y02D70/162

摘要： A wireless sensor network and data transmission method thereof provides for improving channel access efficiency and energy saving effect by using inventive carrier sensing mechanism. The data transmission method includes assessing a channel after initializing, when a packet to be transmitted is generated, a number of carrier sensing attempts (Ns) and a backoff value (W); determining, when the channel availability is assessed to be idle, whether W reaches 0; transmitting the packet if W reaches 0; and reassessing, if W does not reach 0, the channel after a duration corresponding W/(Ns-1) slot.

摘要翻译： 无线传感器网络及其数据传输方法通过使用本发明的载波传感机制来提高信道接入效率和节能效果。 数据传输方法包括：当要发送的分组被生成时，初始化之后的信道，多个载波感测尝试（Ns）和退避值（W）; 确定当信道可用性被评估为空闲时，W是否达到0; 如果W达到0，则发送该数据包; 并且如果W不达到0，则在经过持续时间对应的W /（Ns-1）时隙之后重新评估。

公开(公告)号：US20090180452A1

公开(公告)日：2009-07-16

申请号：US12351902

申请日：2009-01-12

申请人： Eui Jik KIM ,  Sun Gi Kim ,  Hyo Hyun Choi ,  Vu Thuy Dan Nguyen ,  Jeong Geun Kim

发明人： Eui Jik KIM ,  Sun Gi Kim ,  Hyo Hyun Choi ,  Vu Thuy Dan Nguyen ,  Jeong Geun Kim

IPC分类号： H04W4/00

CPC分类号： H04W74/0816 ,  H04W84/18

摘要： A communication terminal and method is provided for improving channel utilization efficiency in a wireless sensor network using contention-based channel access mechanism is disclosed. The communication method according to the present invention comprises initializing, when a packet transmission is required, a contention window to a size; resetting, when a channel is assessed to be busy, the size of the contention window in a hybrid expansion mode; and attempting, when the channel is assessed to be idle, the packet transmission through the channel.

摘要翻译： 本发明提供了一种通过使用基于争用的信道接入机制来提高无线传感器网络中的信道利用效率的通信终端和方法。 根据本发明的通信方法包括：当需要分组传输时，将竞争窗口初始化为大小; 当信道被评估为忙时，在混合扩展模式中重置竞争窗口的大小; 并且当信道被评估为空闲时尝试通过信道传输分组。

公开(公告)号：US20090128298A1

公开(公告)日：2009-05-21

申请号：US12270898

申请日：2008-11-14

申请人： Jehyok RYU ,  Sun Gi Kim ,  Hyo Hyun Choi ,  Sun Shin An ,  Sae Young Ahn ,  Bum Jin Kim

发明人： Jehyok RYU ,  Sun Gi Kim ,  Hyo Hyun Choi ,  Sun Shin An ,  Sae Young Ahn ,  Bum Jin Kim

IPC分类号： H04Q5/22

CPC分类号： G08C21/00

摘要： A method and apparatus for a sensor network having a plurality of reference nodes and a sensor node that enables the sensor node to compute a relative position through transmission range control and position mapping. In transmission range control, each reference node sends location information signals to the sensor node while varying transmission power. In position mapping, the sensor node forms a grid of vertical and horizontal lines corresponding to a square area defined by the neighboring reference nodes, extracts coordinates of intersections in the grid belonging to a shared region between areas covered by location information signals of various transmit power levels from the neighboring reference nodes, and sets the position of the sensor node to the middle points of the extracted coordinates. Each reference node sends a location information signal when a random backoff time expires after reception of a location information request signal.

摘要翻译： 一种用于具有多个参考节点和传感器节点的传感器网络的方法和装置，其使传感器节点能够通过传输范围控制和位置映射来计算相对位置。 在传输范围控制中，每个参考节点在发射功率变化的同时向传感器节点发送位置信息信号。 在位置映射中，传感器节点形成对应于由相邻参考节点定义的平方区域的垂直和水平线的网格，提取属于各种发射功率的位置信息信号覆盖的区域之间的共享区域的网格中的交点的坐标 级别，并将传感器节点的位置设置为提取的坐标的中点。 当接收到位置信息请求信号之后随机退避时间到期时，每个参考节点发送位置信息信号。

公开(公告)号：US20090122747A1

公开(公告)日：2009-05-14

申请号：US12270901

申请日：2008-11-14

申请人： Jeong Sik IN ,  Sun Gi Kim ,  Hyo Hyun Choi ,  Ju Wook Jang ,  Woo Kyung Sung

发明人： Jeong Sik IN ,  Sun Gi Kim ,  Hyo Hyun Choi ,  Ju Wook Jang ,  Woo Kyung Sung

IPC分类号： H04B7/14

CPC分类号： H04B7/2606

摘要： A method and system for transmitting data from a base station to a mobile station in a wireless communication system using a multiple hop relay scheme is In a multi-hop system having a plurality of nodes, performing bidirectional data transmission between the nodes comprises: grouping the plurality of nodes into a first node group to a fourth node group, and assigning data transmission intervals to the grouped node groups at each frame, the data transmission intervals dividing each frame in time; receiving, by a second group node, data from an upper group node at a first frame and, at the same time, receiving, by a third group node, data from a lower group node; and transmitting by the second group node data to the upper group node at a second frame and, at the same time, transmitting by the third group node data to the lower group node.

摘要翻译： 一种在使用多跳中继方案的无线通信系统中从基站向移动台发送数据的方法和系统在具有多个节点的多跳系统中，在所述节点之间执行双向数据传输包括：将 多个节点分成第一节点组到第四节点组，并且将数据传输间隔分配给每个帧处的分组节点组，数据传输间隔在时间上划分每个帧; 由第二组节点接收来自第一帧的上组节点的数据，并且同时由第三组节点接收来自下组节点的数据; 并且由第二组节点将数据以第二帧发送到上组节点，同时由第三组节点发送数据给下组节点。

公开(公告)号：US20090092112A1

公开(公告)日：2009-04-09

申请号：US12248122

申请日：2008-10-09

申请人： Eui Jik Kim ,  Hyo Hyun Choi

发明人： Eui Jik Kim ,  Hyo Hyun Choi

IPC分类号： H04W84/18

CPC分类号： H04W84/20 ,  H04W52/0216 ,  Y02D70/00

摘要： A wireless sensor network system and a cluster management method thereof. The wireless sensor network system includes at least one cluster having at least one sensor node for collecting sensing data, and a cluster head for aggregating the sensing data from the at least one sensor node. A sink node collects the aggregated sensing data from the at least one cluster, wherein the cluster head of a first cluster determines a cluster size of the first cluster, and when the first cluster is a master cluster and the cluster size of the first cluster is less than a threshold size, merges, the first cluster into a second master cluster, and switches the first cluster to a slave cluster. In each cluster, management efficiency can thereby be maintained within a specified range, and the lifetime of a wireless sensor network can be prolonged by reducing energy consumption.

摘要翻译： 无线传感器网络系统及其集群管理方法。 无线传感器网络系统包括至少一个具有至少一个用于收集感测数据的传感器节点的群集，以及用于聚集来自至少一个传感器节点的感测数据的群集头。 汇聚节点从至少一个集群收集聚合的感测数据，其中第一集群的集群头部确定第一集群的集群大小，并且当第一集群是主集群时，第一集群的集群大小为 小于阈值大小，将第一个集群合并到第二个主集群中，并将第一个集群切换到从集群。 在每个集群中，可以将管理效率维持在规定的范围内，通过减少能量消耗来延长无线传感器网络的寿命。