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    Server function for device-to-device based content delivery
    4.
    发明授权
    Server function for device-to-device based content delivery 有权
    服务器功能，用于基于设备到设备的内容传送

    公开(公告)号：US09300724B2

    公开(公告)日：2016-03-29

    申请号：US14490494

    申请日：2014-09-18

    申请人： Saswat Misra ,  Andrew K. Lang

    发明人： Saswat Misra ,  Andrew K. Lang

    IPC分类号： H04Q7/00 ,  H04L29/08 ,  G06Q20/06

    CPC分类号： H04L41/50 ,  G06Q20/065 ,  G06Q20/123 ,  G06Q20/223 ,  H04L5/0037 ,  H04L43/0805 ,  H04L47/70 ,  H04L63/0853 ,  H04L65/4069 ,  H04L67/06 ,  H04L67/104 ,  H04L67/1063 ,  H04L67/1068 ,  H04L67/1074 ,  H04L67/108 ,  H04L67/18 ,  H04L67/20 ,  H04M15/07 ,  H04M15/31 ,  H04M15/46 ,  H04M15/93 ,  H04W4/24 ,  H04W12/02 ,  H04W12/06 ,  H04W76/14 ,  H04W76/15 ,  H04W84/12 ,  H04W88/04

    摘要： A method for operating a server includes receiving, at the server, a request from a mobile device identifying a data file and retrieving the data file from a remote storage device in response to receiving the request. A party other than a party that operates the server operates the remote storage device. A number of collaborator devices are identified. Each of the number of collaborator devices is capable of establishing a mobile-to-mobile communications link with the mobile device. Respective portions of the data file are allocated to each of the number of collaborator devices based on at least one of (a) throughputs associated with the number of collaborator devices and (b) potential debits charged by the number of collaborator devices. Respective portions of the data file are transmitted to each of the number of collaborator devices according to the allocation.

    摘要翻译： 一种用于操作服务器的方法包括在服务器处接收来自标识数据文件的移动设备的请求，并响应于接收到请求从远程存储设备检索数据文件。 操作服务器的一方以外的一方操作远程存储设备。 确定了许多协作者设备。 协作者设备中的每一个能够建立与移动设备的移动到移动通信链路。 基于（a）与协作者设备数量相关联的吞吐量和（b）由协作者设备数量收取的潜在借方中的至少一个，数据文件的相应部分被分配给多个协作者设备中的每一个。 数据文件的相应部分根据分配被发送到多个协作者设备中的每一个。

    Training for time-selective wireless fading channels using cutoff rate
    8.
    发明授权
    Training for time-selective wireless fading channels using cutoff rate 失效
    对使用截止率的时间选择性无线衰落信道进行培训

    公开(公告)号：US07412020B1

    公开(公告)日：2008-08-12

    申请号：US11166077

    申请日：2005-06-27

    申请人： Saswat Misra ,  Ananthram Swami

    发明人： Saswat Misra ,  Ananthram Swami

    IPC分类号： H04L23/00

    CPC分类号： H04L5/003

    摘要： The optimal allocation of resources—power and bandwidth—between training and data transmissions is considered for time-selective Rayleigh flat-fading channels under the cutoff rate criterion. The transmitter, assumed to have statistical channel state information (CSI) in the form of the channel Doppler spectrum, embeds known pilots symbols into the transmission stream. At the receiver, instantaneous, though imperfect, CSI is acquired through minimum mean square estimation of the channel based on some subset of pilot observations. The cutoff rate is computed and the optimal resource allocation is developed using, for example, a Gauss-Markov correlation model of a communication channel or a Jakes model.

    摘要翻译： 在截止率标准下，考虑用于时间选择性瑞利平坦衰落信道的训练和数据传输之间的资源 - 功率和带宽的最佳分配。 假定具有信道多普勒频谱形式的统计信道状态信息（CSI）的发射机将已知导频符号嵌入到传输流中。 在接收机上，瞬时，尽管不完美，基于导频观测的一些子集，通过信道的最小均方估计获得CSI。 计算截止率，并使用例如通信信道或Jakes模型的高斯 - 马尔可夫相关模型来开发最优资源分配。

    Adaptive modulation scheme based on cutoff rate with imperfect channel state information
    9.
    发明授权
    Adaptive modulation scheme based on cutoff rate with imperfect channel state information 失效
    基于具有不完善信道状态信息的截止率的自适应调制方案

    公开(公告)号：US07409015B1

    公开(公告)日：2008-08-05

    申请号：US11288270

    申请日：2005-11-29

    申请人： Saswat Misra ,  Ananthram Swami

    发明人： Saswat Misra ,  Ananthram Swami

    IPC分类号： H04L27/22 ,  H03D3/00

    CPC分类号： H04L1/0019 ,  H04L1/0003 ,  H04L25/0212

    摘要： A cutoff rate may be used to determine an optimal binary input distribution for a communications system which operates with imperfect receiver channel state information (CSI) at the receiver. First, the cutoff rate may be evaluated and used to analyze the optimal binary input as a function of CSI quality and receiver Signal to Noise Ratio (SNR). Next, limiting distributions of BPSK and On-Off Keying (OOK) may be examined and an analytic design rule for adaptive modulation between these two inputs (as the receiver CSI changes) may be derived. The modulation scheme may provide near optimal performance by employing only these limiting distributions rather than the full spectrum of binary inputs. Finally, the results may be used to design an adaptive modulation scheme for Pilot Symbol Assisted Modulation (PSAM) systems.

    摘要翻译： 可以使用截止频率来确定在接收机处以不完美的接收机信道状态信息（CSI）操作的通信系统的最佳二进制输入分布。 首先，可以评估截止频率并用于分析作为CSI质量和接收机信噪比（SNR）的函数的最佳二进制输入。 接下来，可以检查BPSK和开关键控（OOK）的限制分布，并且可以导出这两个输入之间的自适应调制（作为接收机CSI改变）的分析设计规则。 调制方案可以通过仅采用这些限制分布而不是全频二进制输入来提供接近最佳的性能。 最后，结果可用于设计用于导频符号辅助调制（PSAM）系统的自适应调制方案。