利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

44 条记录 (耗时 0.019 秒)

    Channel estimation methods and systems based on power measurement at receivers
    3.
    发明授权
    Channel estimation methods and systems based on power measurement at receivers 有权
    基于接收机功率测量的信道估计方法和系统

    公开(公告)号：US08537928B2

    公开(公告)日：2013-09-17

    申请号：US12901076

    申请日：2010-10-08

    申请人： Mohammad A. Khojastepour ,  Karthikeyan Sundaresan ,  Sampath Rangarajan

    发明人： Mohammad A. Khojastepour ,  Karthikeyan Sundaresan ,  Sampath Rangarajan

    IPC分类号： H04L27/10

    CPC分类号： H04L25/0208 ,  H04B7/0684 ,  H04L25/0228

    摘要： Methods and systems that enable the determination of accurate channel estimates by measuring only power values of pilot signal transmissions at a receiver are described. Various measurement procedures that are based on average power measurements or short term, per-symbol measurements can be employed. Furthermore, procedures utilizing adaptive pilots generated with receiver feedback and deterministic pilots generated without receiver feedback are also described.

    摘要翻译： 描述通过仅测量接收机处的导频信号传输的功率值来确定准确的信道估计的方法和系统。 可以采用基于平均功率测量或短期，每符号测量的各种测量程序。 此外，还描述了利用由接收机反馈产生的自适应导频和无接收机反馈产生的确定性导频的程序。

    RESOURCE MANAGEMENT FRAMEWORK FOR DISTRIBUTED OFDMA FEMTOCELL NETWORKS
    5.
    发明申请
    RESOURCE MANAGEMENT FRAMEWORK FOR DISTRIBUTED OFDMA FEMTOCELL NETWORKS 审中-公开
    分布式OFDMA FEMTOCELL网络的资源管理框架

    公开(公告)号：US20120322454A1

    公开(公告)日：2012-12-20

    申请号：US13495770

    申请日：2012-06-13

    申请人： Karthikeyan Sundaresan ,  Jongwon Yoon ,  Mustafa Y. Arslan

    发明人： Karthikeyan Sundaresan ,  Jongwon Yoon ,  Mustafa Y. Arslan

    IPC分类号： H04W72/04

    CPC分类号： H04L5/0007 ,  H04L5/0058 ,  H04L5/0085 ,  H04L29/06523 ,  H04L41/5003 ,  H04L41/5009 ,  H04W72/082 ,  H04W72/1231 ,  H04W84/045

    摘要： Systems and methods for resource management in distributed femtocell networks include categorizing a clients into a first category that includes interference-insensitive clients and a second category that includes interference-sensitive clients and sub-categorizing the clients in the second category into a low-sensitivity sub-category and a high-sensitivity sub-category. A desired local reuse zone is determined based on a number of interference-insensitive clients and a common reuse zone size is determined based on transmissions from neighboring base stations. Positions for a local reuse zone, transition zone, and isolation zone within a frame are allocated based on the desired local reuse zone and the common reuse zone size. Probing is used on a coarse time scale to determine whether network conditions have changed and, if network conditions have changed, a fine time scale is used for probing to adjust zone sizes according to the changed network conditions.

    摘要翻译： 分布式毫微微小区网络中资源管理的系统和方法包括将客户端分类为包含干扰不敏感客户端的第一类别和包含干扰敏感客户端的第二类别，并将第二类别中的客户端分类为低灵敏度子系统 - 类别和高敏感度子类别。 基于干扰不敏感客户端的数量来确定期望的本地重用区域，并且基于来自相邻基站的传输来确定公共重用区域大小。 基于所需的本地重用区域和公共重用区域大小来分配帧内的本地重用区域，过渡区域和隔离区域的位置。 在粗略的时间尺度上使用探测来确定网络条件是否已经改变，如果网络条件已经改变，则使用精细的时间尺度来进行探测，以根据改变的网络条件来调整区域大小。

    System and method for scheduling in relay-assisted wireless networks
    7.
    发明授权
    System and method for scheduling in relay-assisted wireless networks 有权
    在中继辅助无线网络中进行调度的系统和方法

    公开(公告)号：US08134946B2

    公开(公告)日：2012-03-13

    申请号：US12147680

    申请日：2008-06-27

    申请人： Karthikeyan Sundaresan ,  Xiaodong Wang ,  Mohammad Madihian

    发明人： Karthikeyan Sundaresan ,  Xiaodong Wang ,  Mohammad Madihian

    IPC分类号： H04B7/14 ,  H04J1/10 ,  H04J3/08

    CPC分类号： H04L5/0037 ,  H04B7/022 ,  H04B7/155 ,  H04L5/0023 ,  H04L5/0067 ,  H04W72/1252 ,  H04W84/047

    摘要： A scheduling system and method for use with relay-assisted wireless networks includes accessing feedback from mobile stations in a network and arranging users associated with a relay station in a list in accordance with marginal utilities. A determination of whether the users in the list can be eliminated from feedback overhead by testing conditions for feedback reduction is made. A diversity schedule is generated by employing a weighted bipartite graph with relay channels and access channels and performing a matching method. A transmission schedule is generated for channel usage in accordance with multi-user and channel diversity for mobile users and spatial reuse of channels across relay and access hops by incorporating rate feedback and interference for the mobile stations and the relay stations based upon the matching method applied to a new weighted graph which accounts for traffic loads and fairness as well.

    摘要翻译： 用于与中继辅助无线网络一起使用的调度系统和方法包括从网络中的移动台访问反馈，并根据边际实用程序将与中继站相关联的用户排列在列表中。 做出了通过测试条件进行反馈减少来确定列表中的用户是否能够从反馈开销中消除的问题。 通过采用具有中继信道和接入信道的加权二分图并执行匹配方法来生成分集表。 根据应用的匹配方法，根据用于移动用户的多用户和信道分集以及跨越中继和接入跳的信道的空间重用，为移动站和中继站并入速率反馈和干扰而生成用于信道使用的传输调度 到一个新的加权图，这也说明了交通负载和公平性。

    Method for scheduling heterogeneous traffic in B3G/4G cellular networks with multiple channels
    8.
    发明授权
    Method for scheduling heterogeneous traffic in B3G/4G cellular networks with multiple channels 有权
    用于在具有多个信道的B3G / 4G蜂窝网络中调度异构业务的方法

    公开(公告)号：US07856004B2

    公开(公告)日：2010-12-21

    申请号：US12037227

    申请日：2008-02-26

    申请人： Karthikeyan Sundaresan ,  Xiaodong Wang ,  Mohammad Madihian

    发明人： Karthikeyan Sundaresan ,  Xiaodong Wang ,  Mohammad Madihian

    IPC分类号： H04W4/00

    CPC分类号： H04L47/10 ,  H04L5/0007 ,  H04L5/0037 ,  H04L5/0042 ,  H04L5/0053 ,  H04L5/0066 ,  H04L47/14 ,  H04L47/263 ,  H04L47/283

    摘要： A method includes tracking average user throughput, packet delay and jitter for every user that is serviced in an OFDM cellular system; using feedback to determine a potential schedule set responsive to user requirements for data and voice traffic responsive to minimum rate guarantee for data flows, and maximum tolerable delay and jitter guarantees for voice flows; with multiple flows for each user, first determining contending flow for each user responsive to aggregate rate feedback; obtaining search space for the user requirements of rate, delay and jitter responsive to corresponding optimizing strategies; determining individual rate, delay and jitter related schedules providing maximum incremental or marginal utility; and calculating final schedule of users on channels providing maximum incremental or marginal utility among parameter specific schedules form the determining step.

    摘要翻译： 一种方法包括跟踪在OFDM蜂窝系统中服务的每个用户的平均用户吞吐量，分组延迟和抖动; 使用反馈来响应于数据流的最小速率保证响应用户对数据和语音流量的需求而确定潜在的调度集，以及用于语音流的最大容许延迟和抖动保证; 每个用户具有多个流，首先响应于总体速率反馈确定每个用户的竞争流; 响应于相应的优化策略，获得用户对速率，延迟和抖动的要求的搜索空间; 确定提供最大增量或边际效用的个人速率，延迟和抖动相关时间表; 并且在确定步骤之后计算在参数特定时间表中提供最大增量或边际效用的频道上的用户的最终时间表。

    SYSTEM AND METHOD FOR SCHEDULING IN RELAY-ASSISTED WIRELESS NETWORKS
    10.
    发明申请
    SYSTEM AND METHOD FOR SCHEDULING IN RELAY-ASSISTED WIRELESS NETWORKS 有权
    用于在继电器无线网络中调度的系统和方法

    公开(公告)号：US20090003259A1

    公开(公告)日：2009-01-01

    申请号：US12147680

    申请日：2008-06-27

    申请人： Karthikeyan Sundaresan ,  Xiaodong Wang ,  Mohammad Madihian

    发明人： Karthikeyan Sundaresan ,  Xiaodong Wang ,  Mohammad Madihian

    IPC分类号： H04B7/14

    CPC分类号： H04L5/0037 ,  H04B7/022 ,  H04B7/155 ,  H04L5/0023 ,  H04L5/0067 ,  H04W72/1252 ,  H04W84/047

    摘要： A scheduling system and method for use with relay-assisted wireless networks includes accessing feedback from mobile stations in a network and arranging users associated with a relay station in a list in accordance with marginal utilities. A determination of whether the users in the list can be eliminated from feedback overhead by testing conditions for feedback reduction is made. A diversity schedule is generated by employing a weighted bipartite graph with relay channels and access channels and performing a matching method. A transmission schedule is generated for channel usage in accordance with multi-user and channel diversity for mobile users and spatial reuse of channels across relay and access hops by incorporating rate feedback and interference for the mobile stations and the relay stations based upon the matching method applied to a new weighted graph which accounts for traffic loads and fairness as well.

    摘要翻译： 用于与中继辅助无线网络一起使用的调度系统和方法包括从网络中的移动台访问反馈，并根据边际实用程序将与中继站相关联的用户排列在列表中。 做出了通过测试条件进行反馈减少来确定列表中的用户是否能够从反馈开销中消除的问题。 通过采用具有中继信道和接入信道的加权二分图并执行匹配方法来生成分集表。 根据应用的匹配方法，根据用于移动用户的多用户和信道分集以及跨越中继和接入跳的信道的空间重用，为移动台和中继站并入速率反馈和干扰而生成用于信道使用的传输调度 到一个新的加权图，这也说明了交通负载和公平性。