公开(公告)号：US20070019604A1

公开(公告)日：2007-01-25

申请号：US11412829

申请日：2006-04-28

申请人： Kyeong Hur ,  Chung-gu Kang ,  Ii-whan Kim ,  Ki-seok Chang

发明人： Kyeong Hur ,  Chung-gu Kang ,  Ii-whan Kim ,  Ki-seok Chang

IPC分类号： H04B7/212

CPC分类号： H04W74/02 ,  H04W28/26 ,  H04W74/08 ,  H04W74/0816 ,  H04W84/18

摘要： A media access control method of a wireless sensor network (WSN) is provided. The media access control method includes first sensor nodes, existing in a non-overlapping area where clusters do not overlap, media-accessing with a Time Division Multiple Access (TDMA) method and communicating with a Cluster head (CH) in a first section. Further, and the method includes second sensor nodes, existing in an overlapping area where the clusters overlap, media-accessing with a contention-based method and communicating with the CH in a second section. Because communication between nodes of the non-overlapping area where the clusters do not overlap, uses a reservation-based TDMA method, collision between nodes can be prevented, and because communication between nodes of the overlapping area where the clusters overlap, uses a contention-based CSMA/CA method, interference between neighboring clusters can be prevented.

摘要翻译： 提供了一种无线传感器网络（WSN）的媒体访问控制方法。 媒体访问控制方法包括存在于不重叠群集的非重叠区域中的第一传感器节点，使用时分多址（TDMA）方法的媒体访问和与第一部分中的群头（CH）通信。 此外，该方法包括存在于重叠的重叠区域中的第二传感器节点，基于争用的方法的媒体访问和与第二部分中的CH通信。 由于集群不重叠的非重叠区域的节点之间的通信使用基于预留的TDMA方法，所以可以防止节点之间的冲突，并且由于集群重叠的重叠区域的节点之间的通信使用争用 - 基于CSMA / CA方法，可以防止相邻簇之间的干扰。

公开(公告)号：US07590611B2

公开(公告)日：2009-09-15

申请号：US11412825

申请日：2006-04-28

申请人： Kyeong Hur ,  Chung-gu Kang ,  Il-whan Kim ,  Ki-seok Chang

发明人： Kyeong Hur ,  Chung-gu Kang ,  Il-whan Kim ,  Ki-seok Chang

IPC分类号： G06F9/44 ,  G06N7/02

CPC分类号： H04W40/32 ,  H04W40/10 ,  H04W84/18 ,  Y02D70/326

摘要： A clustering method of a wireless sensor network is provided to minimize energy consumption. The clustering method includes the operations of determining a number of initial nodes within radio range of ordinary node, the ordinary nodes existing within radio range of a cluster head, and setting an ordinary node having a highest number of initial nodes among the ordinary nodes in the radio range of the cluster head, as a gateway. Because the number of usually large energy consuming cluster heads and gateways can be minimized, energy efficiency of wireless sensor network increases.

摘要翻译： 提供无线传感器网络的聚类方法以最小化能量消耗。 聚类方法包括确定普通节点无线电范围内的初始节点数量，存在于簇头无线电范围内的普通节点，以及设置普通节点中普通节点数最多的普通节点的操作 集群头的无线电范围，作为网关。 因为通常能耗较大的能量消耗簇头和网关的数量可以最小化，所以无线传感器网络的能量效率提高。

公开(公告)号：US20060268745A1

公开(公告)日：2006-11-30

申请号：US11412825

申请日：2006-04-28

申请人： Kyeong Hur ,  Chung-gu Kang ,  Il-whan Kim ,  Ki-seok Chang

发明人： Kyeong Hur ,  Chung-gu Kang ,  Il-whan Kim ,  Ki-seok Chang

IPC分类号： H04L12/28

CPC分类号： H04W40/32 ,  H04W40/10 ,  H04W84/18 ,  Y02D70/326

摘要： A clustering method of a wireless sensor network is provided to minimize energy consumption. The clustering method includes the operations of determining a number of initial nodes within radio range of ordinary node, the ordinary nodes existing within radio range of a cluster head, and setting an ordinary node having a highest number of initial nodes among the ordinary nodes in the radio range of the cluster head, as a gateway. Because the number of usually large energy consuming cluster heads and gateways can be minimized, energy efficiency of wireless sensor network increases.

公开(公告)号：US07532598B2

公开(公告)日：2009-05-12

申请号：US11214732

申请日：2005-08-31

申请人： Soon-jin Choi ,  Il-whan Kim ,  Chung-gu Kang ,  Min-seop Jeong ,  Yu-jin Lim

发明人： Soon-jin Choi ,  Il-whan Kim ,  Chung-gu Kang ,  Min-seop Jeong ,  Yu-jin Lim

IPC分类号： H04W4/00

CPC分类号： H04W40/08 ,  H04L45/00 ,  H04L45/32

摘要： A method for flooding a route request packet that is received at a node in a communication system constructed of at least three nodes including a source node that requests to establish a route and a destination node that receives the route request. One of a plurality of levels having different transmission periods is determined using a strength of a received signal of a measured packet. A transmission start point is selected at the determined level, and it is determined whether a route request packet is re-received before the selected transmission start point. The received packet is broadcast at the selected transmission start point when the packet is not re-received. The transmission start point is randomly selected within the transmission period or at the level in consideration of the number of the connected nodes.

摘要翻译： 一种在包括请求建立路由的源节点和接收路由请求的目的地节点的至少三个节点构成的通信系统中的节点处接收的路由请求分组的方法。 使用测量分组的接收信号的强度来确定具有不同传输周期的多个级别之一。 在确定的级别选择传输开始点，并且确定在选择的传输开始点之前是否重新接收到路由请求分组。 当分组未被重新接收时，所接收的分组在所选择的传输开始点被广播。 考虑到所连接的节点的数量，在传输周期内或在等级上随机地选择传输开始点。

公开(公告)号：US20070047510A1

公开(公告)日：2007-03-01

申请号：US11513040

申请日：2006-08-31

申请人： Jun-haeng Cho ,  Chung-gu Kang ,  Il-whan Kim ,  Kun-hyun Kim

发明人： Jun-haeng Cho ,  Chung-gu Kang ,  Il-whan Kim ,  Kun-hyun Kim

IPC分类号： H04Q7/24

CPC分类号： H04W48/12 ,  H04W40/248 ,  H04W40/32 ,  H04W74/04 ,  H04W84/18

摘要： A beacon scheduling method in multi-hop ad-hoc communications is provided. This method can prevent overhead in a manner that a base station (BS) transmits beacon slot information to a carrier sense multiple access (CSMA)/collision avoidance (CA) node (CN) and a gateway (GW) through contention-free time division multiple access (TDMA) communications at initial clustering, the CN and the GW performs a sequential clustering to forward the beacon slot information to a cluster head (CH), the CH aggregates joining messages from nodes and assigns non-colliding beacon slots to the nodes, and the GW uses a beacon slot frame of a beacon transmission period (BTP) used by its selected CH in a beacon reply period (BRP) as well. Accordingly, the CH does not need to separately perform the initialization to elect the beacon slot, and the GW also does not require a separate initialization to select the beacon relay slot.

摘要翻译： 提供了一种多跳自组织通信中的信标调度方法。 该方法可以以基站（BS）通过无竞争时间划分向载波侦听多路访问（CSMA）/冲突避免（CA）节点（CN）和网关（GW）发送信标时隙信息的方式来防止开销 初始聚类的多址（TDMA）通信，CN和GW执行顺序聚类，将信标时隙信息转发到簇头（CH），CH聚合加入来自节点的消息，并向节点分配非冲突信标时隙 ，并且GW还在信标回复周期（BRP）中使用由其选择的CH使用的信标发送周期（BTP）的信标时隙帧。 因此，CH不需要分别执行初始化来选择信标时隙，并且GW也不需要单独的初始化来选择信标中继时隙。

公开(公告)号：US20060045066A1

公开(公告)日：2006-03-02

申请号：US11214732

申请日：2005-08-31

申请人： Soon-jin Choi ,  Il-whan Kim ,  Chung-gu Kang ,  Min-seop Jeong ,  Yu-jin Lim

发明人： Soon-jin Choi ,  Il-whan Kim ,  Chung-gu Kang ,  Min-seop Jeong ,  Yu-jin Lim

IPC分类号： H04L12/28

CPC分类号： H04W40/08 ,  H04L45/00 ,  H04L45/32

摘要： A method for flooding a route request packet that is received at a node in a communication system constructed of at least three nodes including a source node that requests to establish a route and a destination node that receives the route request. One of a plurality of levels having different transmission periods is determined using a strength of a received signal of a measured packet. A transmission start point is selected at the determined level, and it is determined whether a route request packet is re-received before the selected transmission start point. The received packet is broadcast at the selected transmission start point when the packet is not re-received. The transmission start point is randomly selected within the transmission period or at the level in consideration of the number of the connected nodes.

公开(公告)号：US06615382B1

公开(公告)日：2003-09-02

申请号：US09648743

申请日：2000-08-28

申请人： Woo-shik Kang ,  Kyung Hun Jang ,  Chung-gu Kang ,  Chang-wook Ahn

发明人： Woo-shik Kang ,  Kyung Hun Jang ,  Chung-gu Kang ,  Chang-wook Ahn

IPC分类号： H04L108

CPC分类号： H04L1/08 ,  H03M13/353 ,  H03M13/6306 ,  H03M13/6337 ,  H04L1/0009 ,  H04L1/007 ,  H04L1/0072 ,  H04L1/1809 ,  H04L1/1816 ,  H04L1/189

摘要： A method for controlling errors in a wireless link layer using a simultaneous multiple copy scheme and an adaptive forward error correction (FEC) scheme in a wideband wireless communication is provided. The method for controlling errors in a link layer in wideband wireless communication using an automatic repeat request (ARQ) scheme, in which a wideband wireless channel is used for communication between a first node and a second node, includes the steps of (a) estimating the error ratio of a forward (a direction in which a cell is transmitted from the first node to the second node) channel using the state of a backward (a direction in which a cell is transmitted from the second node to the first node) channel, and transmitting a cell, in which a forward error correction (FEC) code having an encoding ratio that varies depending on the estimated error ratio is included in a protocol data unit (PDU) of a wireless link layer, through the forward channel and (b) re-transmitting the copy of a cell transmitted in the step (a), when feedback information that indicates that an error exists in the cell transmitted in the step (a) is received through the backward channel. It is possible to reduce the number of times of re-transmission by improving the probability of correcting forward errors using more error controlling bits as the state of the channel is worse and to minimize the waste of resources using less error controlling bits as the state of the channel is better, to thus obtain the optimal performance and guarantee the minimum delay time.

摘要翻译： 提供了一种在宽带无线通信中使用同时多重复制方案和自适应前向纠错（FEC）方案来控制无线链路层中的错误的方法。 使用宽带无线信道用于第一节点和第二节点之间的通信的自动重复请求（ARQ）方案来控制宽带无线通信中的链路层中的错误的方法包括以下步骤：（a）估计 使用反向的状态（从第二节点向第一节点发送小区的方向）信道的正向（小区从第一节点发送到第二节点的信道的方向）的错误率 ，并且发送小区，其中具有根据所估计的误码率而变化的编码率的前向纠错（FEC）码被包括在无线链路层的协议数据单元（PDU）中，通过前向信道和（ b）当通过反向信道接收到指示在步骤（a）中发送的小区中存在错误的反馈信息时，重传在步骤（a）中发送的小区的副本。 可以通过改善使用更多错误控制位来纠正前向错误的概率来减少重发次数，因为信道的状态更差，并且使用较少的错误控制位作为状态来最小化资源的浪费 通道更好，从而获得最佳性能并保证最短的延时时间。

公开(公告)号：US5227435A

公开(公告)日：1993-07-13

申请号：US626142

申请日：1990-12-12

申请人： Chung-gu Kang ,  Bong-jin Kim

发明人： Chung-gu Kang ,  Bong-jin Kim

IPC分类号： C09D5/03 ,  C08G63/695 ,  C08G77/445 ,  C09D167/00 ,  C09D183/10

CPC分类号： C09D167/00 ,  C08G63/6954 ,  C08G77/445 ,  C09D183/10

摘要： A process for preparing polyester resins for powder coatings by using monomers having a low glass transition temperature and silicone compounds comprises (1) condensation reacting silicone compounds with alcohols having at least two hydroxyl groups, (2) reacting resins prepared by the step (1) with acidic compounds in the presence of esterification catalysts, and (3) reacting resins prepared by step (2) with trimellitic anhydride in the presence of catalysts to form polyester resins having an acid value of 30 to 100, a low melting viscosity, a low softening point, excellent storage stability, good heat-resistance and a good appearance.

摘要翻译： 通过使用具有低玻璃化转变温度的单体和硅氧烷化合物制备用于粉末涂料的聚酯树脂的方法包括（1）使硅氧烷化合物与具有至少两个羟基的醇缩合反应，（2）使由步骤（1）制备的树脂反应， 在酯化催化剂存在下与酸性化合物反应，和（3）在催化剂存在下使步骤（2）制备的树脂与偏苯三酸酐反应，形成酸值为30至100的聚酯树脂，低熔点粘度，低 软化点，储存稳定性好，耐热性好，外观好。

公开(公告)号：US20050089057A1

公开(公告)日：2005-04-28

申请号：US10930900

申请日：2004-09-01

申请人： Chung-gu Kang ,  Won-soo Kim ,  Il-whan Kim

发明人： Chung-gu Kang ,  Won-soo Kim ,  Il-whan Kim

IPC分类号： H04B7/14 ,  H04B7/26 ,  H04L12/28 ,  H04L12/701 ,  H04W16/26 ,  H04W28/00 ,  H04W28/06 ,  H04W40/34 ,  H04W74/08 ,  H04W84/12 ,  H04W84/18 ,  H04W88/04 ,  H04W88/08 ,  H04L12/413

CPC分类号： H04W74/0816 ,  H04W84/18 ,  H04W88/04

摘要： An ad-hoc network wireless communication system transmits data packets from one hop to another hop in a relay manner, and includes a transmitting node for transmitting a RTS message in order to transmit the data packets, and a receiving node, existing in a next hop of the transmitting node, for transmitting a CTS message in response to the RTS message transmitted from the transmitting node. The receiving node transmits the CTS message to another receiving node successively connected to the receiving node in response to the transmitted CTS message, and the transmitting node transmits the data packets to the receiving node in the case that the CTS message transmitted by the receiving node of the next hop is received over a predetermined number of times. The ad-hoc network wireless communication system can maximize the communication efficiency in a multi-hop network with its complexity minimized by extending a MAC protocol based on a IEEE 802.11 DCF to a reservation-based MAC in the multi-hop network.

摘要翻译： 自组织网络无线通信系统以中继方式将数据分组从一跳发送到另一跳，并且包括用于发送RTS消息以发送数据分组的发送节点和存在于下一跳中的接收节点 用于响应于从发送节点发送的RTS消息来发送CTS消息。 接收节点响应于所发送的CTS消息，将CTS消息发送到连接到接收节点的另一个接收节点，并且发送节点在由接收节点发送的CTS消息的情况下将数据分组发送到接收节点 在预定次数下接收下一跳。 自组织网络无线通信系统可以通过将基于IEEE 802.11DCF的MAC协议扩展到多跳网络中的基于预留的MAC来实现其复杂度最小化的多跳网络中的通信效率最大化。

公开(公告)号：US08254345B2

公开(公告)日：2012-08-28

申请号：US11513040

申请日：2006-08-31

申请人： Jun-haeng Cho ,  Chung-gu Kang ,  Il-whan Kim ,  Kun-hyun Kim

发明人： Jun-haeng Cho ,  Chung-gu Kang ,  Il-whan Kim ,  Kun-hyun Kim

IPC分类号： H04J3/00

CPC分类号： H04W48/12 ,  H04W40/248 ,  H04W40/32 ,  H04W74/04 ,  H04W84/18

摘要： A beacon scheduling method in multi-hop ad-hoc communications is provided. This method can prevent overhead in a manner that a base station (BS) transmits beacon slot information to a carrier sense multiple access (CSMA)/collision avoidance (CA) node (CN) and a gateway (GW) through contention-free time division multiple access (TDMA) communications at initial clustering, the CN and the GW performs a sequential clustering to forward the beacon slot information to a cluster head (CH), the CH aggregates joining messages from nodes and assigns non-colliding beacon slots to the nodes, and the GW uses a beacon slot frame of a beacon transmission period (BTP) used by its selected CH in a beacon reply period (BRP) as well. Accordingly, the CH does not need to separately perform the initialization to elect the beacon slot, and the GW also does not require a separate initialization to select the beacon relay slot.

摘要翻译： 提供了一种多跳自组织通信中的信标调度方法。 该方法可以以基站（BS）通过无竞争时间划分向载波侦听多路访问（CSMA）/冲突避免（CA）节点（CN）和网关（GW）发送信标时隙信息的方式来防止开销 初始聚类的多址（TDMA）通信，CN和GW执行顺序聚类，将信标时隙信息转发到簇头（CH），CH聚合加入来自节点的消息，并向节点分配非冲突信标时隙 ，并且GW还在信标回复周期（BRP）中使用由其选择的CH使用的信标发送周期（BTP）的信标时隙帧。 因此，CH不需要分别执行初始化来选择信标时隙，并且GW也不需要单独的初始化来选择信标中继时隙。