公开(公告)号：US20060034247A1

公开(公告)日：2006-02-16

申请号：US10917053

申请日：2004-08-12

申请人： Daqing Gu ,  Zhifeng Tao ,  Jinyun Zhang

发明人： Daqing Gu ,  Zhifeng Tao ,  Jinyun Zhang

IPC分类号： H04J3/24

CPC分类号： H04L1/165 ,  H04L1/1628 ,  H04L1/1671

摘要： A method selectively acknowledges data packets in a network including a multiple stations connected by a common wireless channel. A transmitting station requests a block acknowledgement from a receiving station. The transmitting station transmits a block of data packets to the receiving station. The receiving station determines a number of successfully received data packets and a number of incorrectly received packets. Then, the receiving station selectively acknowledges only the successfully received data packets if the number of usefully received data packets is less than the number of incorrectly received data packets, and otherwise acknowledging only the incorrectly received packets.

摘要翻译： 一种方法选择性地确认包括通过公共无线信道连接的多个站的网络中的数据分组。 发送站请求来自接收站的块确认。 发送站向接收站发送数据分组块。 接收站确定成功接收的数据包的数量和一些不正确接收的包。 然后，如果有效接收的数据分组的数量小于错误接收的数据分组的数量，则接收站选择性地仅确认成功接收的数据分组，否则仅确认不正确接收的分组。

公开(公告)号：US20110116389A1

公开(公告)日：2011-05-19

申请号：US12618235

申请日：2009-11-13

申请人： Zhifeng Tao ,  Di Wang ,  Jinyun Zhang

发明人： Zhifeng Tao ,  Di Wang ,  Jinyun Zhang

IPC分类号： H04L12/26

CPC分类号： H04W40/22 ,  H04L45/18 ,  H04W40/125 ,  H04W40/248

摘要： Embodiments of the invention disclose a system and a method for determining a rank of a node in a multi-hop wireless network, wherein the network includes a gateway node, client nodes, and relay nodes, wherein a node p(i) is a default parent of the node i having a rank, and the network uses a directed acyclic graph (DAG) topology. The method comprises steps of transmitting at least one data packet from the node to the default parent node over a wireless link; counting a number of successful transmissions of most recent transmissions of data packets; determining an expected transmission time (ETX) for the wireless link based on the number of successful transmissions in the most recent transmissions; and assigning a rank R(i) to the node based on the rank of the parent node and the ETX.

摘要翻译： 本发明的实施例公开了一种用于确定多跳无线网络中的节点的等级的系统和方法，其中所述网络包括网关节点，客户端节点和中继节点，其中节点p（i）是默认的 具有等级的节点的父节点，并且网络使用有向非循环图（DAG）拓扑。 该方法包括以下步骤：通过无线链路将来自节点的至少一个数据分组发送到默认父节点; 计数数据分组的最近传输的成功传输的数量; 基于最近传输中成功传输的数量确定无线链路的预期传输时间（ETX）; 并且基于父节点和ETX的等级将节点R（i）分配给节点。

公开(公告)号：US07903537B2

公开(公告)日：2011-03-08

申请号：US12112346

申请日：2008-04-30

申请人： Zhifeng Tao ,  Yu-Jung Chang ,  Jinyun Zhang

发明人： Zhifeng Tao ,  Yu-Jung Chang ,  Jinyun Zhang

IPC分类号： H04J11/00 ,  H04J1/00 ,  H04W40/00 ,  H04W72/00 ,  H04K1/10 ,  H04K1/02 ,  H03D1/04

CPC分类号： H04L5/0032 ,  H04L5/0037 ,  H04L5/0058

摘要： A method allocates radio channel resources in an orthogonal frequency-division multiple access network including a set of base stations (BS) and a set of mobile stations (MS). For each BS, a diversity set is maintained for the sets of MS. Each BS determines possible interference at the MS based on the diversity set. A graph is constructed, in which nodes represent the sets of MS, mid each edge between a pair of nodes represents channel interference between the MS represented by the pair of nodes. A weight is assigned to each edge, which reflects interference between the two MSs connected by the edge. The interference graph is partitioned into non-overlapping clusters of nodes based on a structure of the interference graph, the potential interference, so that a sum of the weights of the edges between each cluster is maximized. Based upon the graph partitioning, the channel resources are allocated to the mobile stations in order to maximize the system capacity.

摘要翻译： 一种方法在包括一组基站（BS）和一组移动站（MS）的正交频分多址网络中分配无线电信道资源。 对于每个BS，为MS集合保持分集集合。 每个BS基于分集集确定MS处的可能干扰。 构建了一个图，其中节点表示MS集合，一对节点之间的每个边中间表示由该对节点表示的MS之间的信道干扰。 权重被分配给每个边缘，其反映由边缘连接的两个MS之间的干扰。 基于干扰图的结构，潜在的干扰，干扰图被划分成不重叠的节点簇，使得每个簇之间的边的权重之和最大化。 基于图分割，将信道资源分配给移动台，以便最大化系统容量。

公开(公告)号：US07826848B2

公开(公告)日：2010-11-02

申请号：US11931378

申请日：2007-10-31

申请人： Zhifeng Tao ,  Tairan Wang ,  Jinyun Zhang

发明人： Zhifeng Tao ,  Tairan Wang ,  Jinyun Zhang

IPC分类号： H04W36/00

CPC分类号： H04W36/18

摘要： A method and system communicates cooperatively between base stations and mobile stations in a wireless cellular network. At least two mobile stations are detected in a handover region. A diversity set is established for each mobile station in the handover region. Each diversity set identifies at least two base stations that can communicate with the associated mobile station. The at least two base stations and the at least two mobile stations are combined into members of a cooperation set. A resource is allocated to selected members of the cooperative set. The selected members are notified of the allocated resource. Then, the selected base stations of the cooperation set communicate concurrently with the selected mobile stations using the same allocated resource.

摘要翻译： 方法和系统在无线蜂窝网络中的基站和移动台之间协作通信。 在切换区域中至少检测到两个移动站。 为切换区域中的每个移动站建立分集集合。 每个分集集识别可以与相关联的移动台进行通信的至少两个基站。 所述至少两个基站和所述至少两个移动台组合成合作集的成员。 资源被分配给合作集合的选定成员。 所选成员被通知所分配的资源。 然后，使用相同的分配资源，所选择的协作集的基站与所选择的移动台同时进行通信。

公开(公告)号：US20100254369A1

公开(公告)日：2010-10-07

申请号：US12419874

申请日：2009-04-07

申请人： Zhifeng Tao ,  Philip V. Orlik ,  Zafer Sahinoglu ,  Andreas F. Molisch ,  Jinyun Zhang

发明人： Zhifeng Tao ,  Philip V. Orlik ,  Zafer Sahinoglu ,  Andreas F. Molisch ,  Jinyun Zhang

IPC分类号： H04J3/16 ,  H04L27/28

CPC分类号： H04L1/1621 ,  H04L27/26 ,  H04L2001/0093 ,  H04L2001/0097

摘要： A network includes a master node (master) and a set of slave nodes (slaves). The network uses orthogonal frequency-division multiplexing (OFDM) and time division multiple access (TDMA) symbols on sub-carriers. During a first downlink transmission from the master to the set of slaves using downlinks and all of the sub-carriers, a broadcast polling packet including data packets for each slave and sub-carrier assignments for the slaves is broadcast. Each slave transmits simultaneously to the master using uplinks and the assigned sub-carriers, a first response packet after receiving the broadcast polling packet. The master then broadcasts using the downlinks and all of the sub-carriers, a group acknowledgement packet, wherein the broadcast polling packet, the response packet, and the group acknowledgement packet include one superframe in one communication cycle, and wherein the broadcasting on the downlinks and the transmitting on the uplinks are disjoint in time.

摘要翻译： 网络包括主节点（主节点）和一组从节点（从节点）。 该网络在子载波上使用正交频分复用（OFDM）和时分多址（TDMA）符号。 在使用下行链路和所有子载波从主机到从机组的第一次下行链路传输期间，广播包括用于每个从机的数据分组的广播轮询分组和用于从机的子载波分配。 每个从设备使用上行链路和分配的子载波同时发送到主设备，第一响应分组在接收到广播轮询分组之后。 然后主机使用下行链路和所有子载波，一组确认分组广播，其中广播轮询分组，响应分组和组确认分组在一个通信周期中包括一个超帧，并且其中在下行链路上进行广播 并且在上行链路上的发送在时间上是不相交的。

公开(公告)号：US20100061469A1

公开(公告)日：2010-03-11

申请号：US12205554

申请日：2008-09-05

申请人： Zhifeng Tao ,  Yu-Jung Chang ,  Jinyun Zhang

发明人： Zhifeng Tao ,  Yu-Jung Chang ,  Jinyun Zhang

IPC分类号： H04L27/28 ,  H04W72/04

CPC分类号： H04L5/0007 ,  H04L5/003 ,  H04L5/0032 ,  H04L5/0067 ,  H04W16/12 ,  H04W72/0453

摘要： A method allocates frequency subchannels in an orthogonal frequency-division multiple access (OFDMA) network including a set of base stations and a set of mobile stations for each base station. A graph of nodes and edges is constructed, in which the nodes represent the mobile stations in the network, and the edges connecting the nodes represent subchannel allocation constraints to be satisfied for the mobile stations represented by the nodes. The nodes are colored with colors selected from a set of colors such that subchannel allocation constraints of a pair of nodes connected by one of the edges are satisfied. The subchannels are allocated to the mobile stations according to the colors of the corresponding the nodes.

摘要翻译： 一种方法在包括一组基站和每个基站的一组移动台的正交频分多址（OFDMA）网络中分配频率子信道。 构建节点和边缘的图，其中节点表示网络中的移动站，并且连接节点的边表示子节点分配约束，以便为由节点表示的移动站满足。 节点用从一组颜色中选择的颜色着色，使得由一个边缘连接的一对节点的子信道分配约束得到满足。 子信道根据相应节点的颜色分配给移动台。

公开(公告)号：US20090245086A1

公开(公告)日：2009-10-01

申请号：US12112400

申请日：2008-04-30

申请人： Zhifeng Tao ,  Yu-Jung Chang ,  Jinyun Zhang

发明人： Zhifeng Tao ,  Yu-Jung Chang ,  Jinyun Zhang

IPC分类号： H04J11/00

CPC分类号： H04L5/0032 ,  H04L5/0037 ,  H04L5/0058

摘要： A method allocates radio channel resource in an orthogonal frequency-division multiple access network including a set of base stations (BS) and a set of mobile stations (MS). For each BS, a diversity set is maintained for the sets of MS. Each BS determines possible interference at the MS based on the diversity set. A graph is constructed, in which nodes represent the sets of MS, and each edge between a pair of nodes represents channel interference between the MS represented by the pair of nodes. A weight is assigned to each edge, which reflects interference and signal strength on the subchannel between the two MSs connected by the edge. Channel resources are allocated to the MS based on the graph.

摘要翻译： 一种方法在包括一组基站（BS）和一组移动站（MS）的正交频分多址网络中分配无线电信道资源。 对于每个BS，为MS集合保持分集集合。 每个BS基于分集集确定MS处的可能干扰。 构建图，其中节点表示MS集合，并且一对节点之间的每个边缘表示由该对节点表示的MS之间的信道干扰。 权重分配给每个边缘，其反映由边缘连接的两个MS之间的子信道上的干扰和信号强度。 信道资源根据图表分配给MS。

公开(公告)号：US20090220085A1

公开(公告)日：2009-09-03

申请号：US12204093

申请日：2008-09-04

申请人： Zhifeng Tao ,  Jinyun Zhang

发明人： Zhifeng Tao ,  Jinyun Zhang

IPC分类号： H04L9/00 ,  H04K1/00

CPC分类号： H04L63/0428 ,  H04L1/0075 ,  H04L63/0272 ,  H04W12/001 ,  H04W84/12

摘要： Provided is a data structure for transmitting a relay media access control (MAC) protocol data unit (PDU) between stations in a multi-hop relay network. The MAC PDU includes an encryption control bit, an allocation subheader bit, a grant management subheader bit, a fragmentation subheader bit, a packing subheader bit, a quality of service subheader bit, and an encryption key sequence. The relay MAC PDU is transmitted in a tunnel established between base station and relay station.

摘要翻译： 提供了一种用于在多跳中继网络中的站之间发送中继媒体接入控制（MAC）协议数据单元（PDU）的数据结构。 MAC PDU包括加密控制位，分配子头位，授权管理子头位，分段子头位，打包子头位，服务质量分头位和加密密钥序列。 中继MAC PDU在基站和中继站之间建立的隧道中进行传输。

公开(公告)号：US20090074088A1

公开(公告)日：2009-03-19

申请号：US11854790

申请日：2007-09-13

申请人： Zhifeng Tao ,  Anfei Li ,  Koon Hoo Teo ,  Jinyun Zhang

发明人： Zhifeng Tao ,  Anfei Li ,  Koon Hoo Teo ,  Jinyun Zhang

IPC分类号： H04J11/00 ,  H03M13/03 ,  H04L27/28

CPC分类号： H04L1/1812 ,  H04L1/0007 ,  H04L27/2601

摘要： A method performs a hybrid automatic repeat-request (HARQ) operation in a wireless orthogonal frequency division multiple access (OFDMA) network. A quality of a channel between a transmitter and a receiver is estimated as an error metric. A packet for the HARQ operation is fragmented adaptively at the transmitter according to the estimated error metric. The fragmentation is performed at the HARQ layer when the error metric is less than a predetermined threshold, otherwise the fragmentation is performed at the MAC layer.

摘要翻译： 一种方法在无线正交频分多址（OFDMA）网络中执行混合自动重传请求（HARQ）操作。 发射机和接收机之间的信道的质量被估计为误差度量。 用于HARQ操作的分组根据估计的误差度量在发射机处被自适应地分段。 当错误度量小于预定阈值时，在HARQ层执行分段，否则在MAC层执行分段。

公开(公告)号：US20090016372A1

公开(公告)日：2009-01-15

申请号：US12117219

申请日：2008-05-08

申请人： Zhifeng Tao ,  Andreas F. Molisch ,  Philip V. Orlik ,  Jinyun Zhang ,  Shigeru Uchida ,  Kentarou Sawa

发明人： Zhifeng Tao ,  Andreas F. Molisch ,  Philip V. Orlik ,  Jinyun Zhang ,  Shigeru Uchida ,  Kentarou Sawa

IPC分类号： H04J3/16

CPC分类号： H04B7/0874 ,  H04B7/063 ,  H04B7/0691 ,  H04L5/0007

摘要： A method selects antennas in an OFDMA wireless network including a base station and a mobile station. The mobile station measures a channel state of a downlink in a downlink subframe using different subsets of available antennas, and selects a subset of receive antennas for downlink reception based on the channel states between the base station and the different subsets of antennas at the mobile station. The base station measures the channel state in an uplink using an uplink subframe received in the base station from the mobile station, and selects a subset of transmit antennas for mobile station's uplink transmission based on the channel states between the base station and different subset of antennas at the mobile station.

摘要翻译： 一种方法选择包括基站和移动台的OFDMA无线网络中的天线。 移动站使用不同的可用天线子集来测量下行链路子帧中的下行链路的信道状态，并且基于移动站的基站和不同的天线子集之间的信道状态来选择用于下行链路接收的接收天线的子集 。 基站使用来自移动站的基站中接收到的上行链路子帧来测量上行链路中的信道状态，并且基于基站和不同的天线子集之间的信道状态来选择用于移动台的上行链路传输的发射天线的子集 在移动台。