利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

169 条记录 (耗时 0.029 秒)

    Scheduling algorithms for multi-user (MU) multiple-input multiple-output (MIMO) communication systems
    3.
    发明授权
    Scheduling algorithms for multi-user (MU) multiple-input multiple-output (MIMO) communication systems 有权
    多用户（MU）多输入多输出（MIMO）通信系统的调度算法

    公开(公告)号：US09184810B2

    公开(公告)日：2015-11-10

    申请号：US13465522

    申请日：2012-05-07

    申请人： Zhi Quan ,  Simone Merlin ,  Santosh Paul Abraham ,  Sameer Vermani ,  Hemanth Sampath

    发明人： Zhi Quan ,  Simone Merlin ,  Santosh Paul Abraham ,  Sameer Vermani ,  Hemanth Sampath

    IPC分类号： H04W4/00 ,  H04B7/04 ,  H04W72/12

    CPC分类号： H04B7/0452 ,  H04W72/12 ,  H04W72/1221

    摘要： A method is provided for wirelessly transmitting from a transmitter to one or more receivers within a multi-user (MU) multiple-input and multiple-output (MIMO) communication system. A number of concurrent (spatial) streams are dynamically allocated in a MU-MIMO transmission to each of a plurality of served receivers to maximize total data transmitted on each transmission. Streams are allocated according to a corresponding transmission queue length for each receiver and the number of receive antennas used by each of the served receivers. A transmission timer is started upon sending the transmission. A random backoff counter is also started upon one of either: (a) expiration of the transmission timer or (b) receipt of data at a transmission queue. A new transmission is sent upon expiration of the random backoff counter if the transmission timer has expired. Otherwise, the random backoff counter is restarted one or more times until the transmission timer has expired.

    摘要翻译： 提供了一种用于从多用户（MU）多输入（MIMO）通信系统中的发射机向一个或多个接收机进行无线发射的方法。 在MU-MIMO传输中动态地将多个并行（空间）流分配给多个服务接收机中的每一个，以最大化在每个传输上传输的总数据。 流根据每个接收机的相应传输队列长度和每个被服务接收机使用的接收天线的数量来分配。 传送定时器在发送传输时开始。 以下之一也开始随机退避计数器：（a）传输定时器到期或（b）在传输队列处接收数据。 如果发送定时器已经到期，则在随机退避计数器到期时发送新的传输。 否则，随机退避计数器重新启动一次或多次，直到传输定时器到期。

    MANAGING TRANSMIT POWER FOR BETTER FREQUENCY RE-USE IN TV WHITE SPACE
    5.
    发明申请
    MANAGING TRANSMIT POWER FOR BETTER FREQUENCY RE-USE IN TV WHITE SPACE 审中-公开
    管理发射功率，在电视白天更好的频率重新使用

    公开(公告)号：US20130044681A1

    公开(公告)日：2013-02-21

    申请号：US13397493

    申请日：2012-02-15

    申请人： Santosh Paul Abraham ,  Sameer Vermani ,  Hemanth Sampath ,  Stephen J. Shellhammer ,  Rahul Tandra

    发明人： Santosh Paul Abraham ,  Sameer Vermani ,  Hemanth Sampath ,  Stephen J. Shellhammer ,  Rahul Tandra

    IPC分类号： H04W4/00

    CPC分类号： H04L1/0002 ,  H04L1/0009 ,  H04L1/0025 ,  H04L1/0027 ,  H04W16/14 ,  H04W52/262 ,  H04W52/50

    摘要： Certain aspects of the present disclosure provide techniques and apparatus for managing transmit power in a television white space (TVWS) network. By managing transmit power as described herein, medium re-use may be improved in such a network, and unfair usage problems may be alleviated. One example method generally includes receiving a request message comprising an indication of a modulation and coding scheme (MCS) for transmitting data frames to be received, determining a link margin based on the MCS, and transmitting a response message with an indication of the link margin. Another example method generally includes determining a MCS for transmitting data frames and transmitting a request message comprising an indication of the MCS.

    摘要翻译： 本公开的某些方面提供了用于管理电视空白（TVWS）网络中的发射功率的技术和装置。 通过如本文所述管理发送功率，可以在这样的网络中改善中等重复使用，并且可以减轻不公平的使用问题。 一个示例性方法通常包括接收包括用于发送要接收的数据帧的调制和编码方案（MCS）的指示的请求消息，基于MCS确定链路余量，以及发送具有链路余量指示的响应消息 。 另一示例性方法通常包括确定用于发送数据帧的MCS并发送包括MCS的指示的请求消息。

    MANAGING TRANSMIT POWER FOR BETTER FREQUENCY RE-USE IN TV WHITE SPACE
    6.
    发明申请
    MANAGING TRANSMIT POWER FOR BETTER FREQUENCY RE-USE IN TV WHITE SPACE 有权
    管理发射功率，在电视白天更好的频率重新使用

    公开(公告)号：US20130044680A1

    公开(公告)日：2013-02-21

    申请号：US13397473

    申请日：2012-02-15

    申请人： Santosh Paul Abraham ,  Sameer Vermani ,  Hemanth Sampath ,  Stephen J. Shellhammer ,  Rahul Tandra

    发明人： Santosh Paul Abraham ,  Sameer Vermani ,  Hemanth Sampath ,  Stephen J. Shellhammer ,  Rahul Tandra

    IPC分类号： H04W52/04

    CPC分类号： H04W16/14 ,  H04W48/12 ,  H04W52/242 ,  H04W52/246 ,  H04W52/325 ,  H04W52/367 ,  H04W74/0808

    摘要： Certain aspects of the present disclosure provide techniques and apparatus for managing transmit power in a television white space (TVWS) network. By managing transmit power as described herein, medium re-use may be improved in such a network, and unfair usage problems may be alleviated. One example method generally includes receiving, from an apparatus, a message with an indication of a highest transmit power used by the apparatus for transmitting data frames; and determining that the apparatus is a dominant interferer based, at least in part, on the highest transmit power. Another example method generally includes receiving, from an apparatus, a control or management message with a first indication of a first transmit power used by the apparatus for transmitting data frames; and determining that the apparatus is a dominant interferer based, at least in part, on the first transmit power.

    摘要翻译： 本公开的某些方面提供了用于管理电视空白（TVWS）网络中的发射功率的技术和装置。 通过如本文所述管理发送功率，可以在这样的网络中改善中等重复使用，并且可以减轻不公平的使用问题。 一个示例性方法通常包括从设备接收具有由用于发送数据帧的设备使用的最高发射功率的指示的消息; 以及至少部分地基于最高发射功率确定所述装置是主要干扰源。 另一示例性方法通常包括从装置接收控制或管理消息，其具有用于发送数据帧的装置所使用的第一发射功率的第一指示; 以及至少部分地基于所述第一发射功率来确定所述装置是主要干扰源。