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248 条记录 (耗时 0.027 秒)

    Minimizing feedback rate for channel state information in MIMO systems
    11.
    发明授权
    Minimizing feedback rate for channel state information in MIMO systems 有权
    最小化MIMO系统中信道状态信息的反馈速率

    公开(公告)号：US07359470B2

    公开(公告)日：2008-04-15

    申请号：US10939284

    申请日：2004-09-10

    申请人： Andreas F. Molisch ,  Jianxuan Du ,  Ye Li ,  Daqing Gu ,  Jinyun Zhang

    发明人： Andreas F. Molisch ,  Jianxuan Du ,  Ye Li ,  Daqing Gu ,  Jinyun Zhang

    IPC分类号： H04L7/02

    CPC分类号： H04L1/0687

    摘要： A method minimizes a rate for feeding back channel state information from a receiver to a transmitter in a multi-input, multi-output communications systems. A temporal autocorrelation function of the channel between the transmitter and the receiver is determined. A spatial covariance information is estimated of the channel. Then, the minimum rate for feeding back channel state information from the receiver to the transmitter is based on actual channel state information and the estimated spatial covariance information and the temporal autocorrelation function.

    摘要翻译： 一种方法使在多输入多输出通信系统中将信道状态信息从接收机反馈到发射机的速率最小化。 确定发射机和接收机之间的信道的时间自相关函数。 估计通道的空间协方差信息。 然后，从接收机向发射机反馈信道状态信息的最小速率基于实际信道状态信息和估计的空间协方差信息和时间自相关函数。

    Scheduling packet flows in multi-rate wireless local area networks
    15.
    发明申请
    Scheduling packet flows in multi-rate wireless local area networks 失效
    在多速率无线局域网中调度数据包流

    公开(公告)号：US20050180444A1

    公开(公告)日：2005-08-18

    申请号：US10780357

    申请日：2004-02-17

    申请人： Daqing Gu ,  Jinyun Zhang ,  Yuan Yuan

    发明人： Daqing Gu ,  Jinyun Zhang ,  Yuan Yuan

    IPC分类号： H04B7/26 ,  H04L12/28 ,  H04L12/56

    CPC分类号： H04W72/1257 ,  H04L47/10 ,  H04L47/14 ,  H04L47/50 ,  H04L47/522 ,  H04L47/564 ,  H04L47/6265 ,  H04W28/22 ,  H04W84/12

    摘要： A system and method schedule series of packets for transmission between terminals in a single wireless channel of a packet-switched local area network. The local area network can operate in an ad hoc mode or in infrastructure mode. A transmission rate is assigned to each of the terminals. The terminals can be mobile. Different terminals can be assigned different transmission rates, depending on a quality of the channel. That is, terminals transmitting via an error-free channel are assigned a higher transmission rate than terminals transmitting via an error-prone channel. Then, the series of packets are scheduled for transmission between the terminals such that each terminal receives a substantially equal amount of transmission time over an extended period of time.

    摘要翻译： 一种用于在分组交换局域网的单个无线信道中的终端之间传输的分组的系统和方法计划。 局域网可以以自组织模式或基础架构模式运行。 对每个终端分配传输速率。 终端可以移动。 根据通道的质量，不同的终端可以分配不同的传输速率。 也就是说，经由无差错信道发送的终端被分配比通过容易出错的信道发送的终端更高的传输速率。 然后，一系列分组被调度用于在终端之间进行传输，使得每个终端在延长的时间段内接收大致相等量的传输时间。

    Antenna/beam selection training in MIMO wireless LANS with different sounding frames
    16.
    发明授权
    Antenna/beam selection training in MIMO wireless LANS with different sounding frames 有权
    天线/波束选择训练在具有不同声音帧的MIMO无线LAN中

    公开(公告)号：US08284686B2

    公开(公告)日：2012-10-09

    申请号：US12293458

    申请日：2006-03-30

    申请人： Daqing Gu ,  Hongyuan Zhang ,  Jinyun Zhang ,  Andreas F. Molisch

    发明人： Daqing Gu ,  Hongyuan Zhang ,  Jinyun Zhang ,  Andreas F. Molisch

    IPC分类号： H04W4/00

    CPC分类号： H04B7/0691 ,  H04B7/0608 ,  H04B7/061 ,  H04B7/0626 ,  H04B7/0634 ,  H04B7/0636 ,  H04B7/0695 ,  H04B7/0874 ,  H04B7/088 ,  H04W84/12

    摘要： A method selects antennas in a multiple-input, multiple-output (MIMO) wireless local area network (WLAN) that includes a plurality of stations, and each station includes a set of antennas. Plural consecutive packets, received at a station, include plural consecutive sounding packets. Each sounding packet corresponds to a different subset of the set of antennas, and at least one of the plural consecutive packets includes a high throughput (HT) control field including a signal to initiate antenna selection and a number N indicative of a number of sounding packets which follow the at least one packet including the HT control field and which are to be used for antenna selection. A channel matrix is estimated based on a characteristic of the channel as indicated by the received N sounding packets, and a subset of antennas is selected according to the channel matrix. Station and computer program product embodiments include similar features.

    摘要翻译： 一种方法选择包括多个站的多输入多输出（MIMO）无线局域网（WLAN）中的天线，并且每个站包括一组天线。 在站处接收的多个连续分组包括多个连续的探测分组。 每个探测分组对应于该组天线的不同子集，并且多个连续分组中的至少一个分组包括高吞吐量（HT）控制字段，包括用于发起天线选择的信号和指示多个探测分组的数量N 其遵循至少一个包括HT控制字段并将用于天线选择的分组。 基于由接收的N个探测分组指示的信道的特性来估计信道矩阵，并且根据信道矩阵选择天线的子集。 站和计算机程序产品实施例包括类似的特征。

    Access control and protocol for packet switched wireless communications networks
    17.
    发明授权
    Access control and protocol for packet switched wireless communications networks 有权
    分组交换无线通信网络的接入控制和协议

    公开(公告)号：US07388833B2

    公开(公告)日：2008-06-17

    申请号：US10861258

    申请日：2004-06-04

    申请人： Yuan Yuan ,  Daqing Gu ,  Jinyun Zhang

    发明人： Yuan Yuan ,  Daqing Gu ,  Jinyun Zhang

    IPC分类号： H04L1/00

    CPC分类号： H04W74/0816 ,  H04W74/08

    摘要： A method transmits packets over a single channel in a wireless communication network that includes multiple nodes. Access to the channel is gained in a transmitting node. Then, a block of packets is transmitted to a receiving node via the channel. The transmitting node receives only a single acknowledgement packet from the receiving node in response to transmitting the block of packets.

    摘要翻译： 一种方法在包括多个节点的无线通信网络中的单个信道上发送分组。 在发送节点中获得对信道的访问。 然后，通过信道将一个分组块发送到接收节点。 发送节点响应于发送分组块而仅从接收节点接收单个确认分组。

    Signaling in a wireless network with sequential coordinated channel access
    19.
    发明申请
    Signaling in a wireless network with sequential coordinated channel access 有权
    在具有顺序协调通道访问的无线网络中进行信令

    公开(公告)号：US20060034219A1

    公开(公告)日：2006-02-16

    申请号：US10915801

    申请日：2004-08-11

    申请人： Daqing Gu ,  Zhifeng Tao ,  Jinyun Zhang

    发明人： Daqing Gu ,  Zhifeng Tao ,  Jinyun Zhang

    IPC分类号： H04L12/413

    CPC分类号： H04L47/824 ,  H04L47/14 ,  H04L47/15 ,  H04L47/70 ,  H04L47/72 ,  H04L47/765 ,  H04L47/788 ,  H04W28/20 ,  H04W74/04 ,  H04W74/0808 ,  H04W74/0866

    摘要： A method signals data in a channel of a network including multiple stations and an access point connected by a wireless channel. A station first requests access to the channel using a sequential coordinated channel access method of an access point. After the station receives permission to access the channel during a contention free period at a time corresponding to a sequence index value received by the station from the access point, the station transmits a resource request message to the access point to obtain a bandwidth allocation. In response, the station receives the bandwidth allocation, and the station can then transmit data during the contention free period according to the bandwidth allocation.

    摘要翻译： 一种方法是在包括多个站的网络的信道中的信号和由无线信道连接的接入点的信号。 首先，使用接入点的顺序协调信道接入方法请求接入信道。 在与站点从接入点接收到的序列索引值相对应的时间段内，在无竞争阶段期间接收到访问信道的许可之后，站向接入点发送资源请求消息以获得带宽分配。 作为响应，站接收带宽分配，然后站可以根据带宽分配在无竞争期间发送数据。