公开(公告)号：US07848298B2

公开(公告)日：2010-12-07

申请号：US11190107

申请日：2005-07-25

申请人： Rashid A. Attar ,  Peter J. Black ,  Naga Bhushan

发明人： Rashid A. Attar ,  Peter J. Black ,  Naga Bhushan

IPC分类号： H04B7/216

CPC分类号： H04W28/18

摘要： A method and system for de-coupling forward and reverse link assignment for multi-carrier wireless communication systems. A method may assign two or more forward link code division multiple access (CDMA) carriers to transmit data from a base station to an access terminal; assign one or more reverse link CDMA carriers to transmit data from the access terminal to the base station; and limit reverse link overhead transmissions corresponding to the two or more forward link CDMA carriers.

摘要翻译： 一种用于解耦多载波无线通信系统的前向和反向链路分配的方法和系统。 方法可以分配两个或更多个前向链路码分多址（CDMA）载波，以将数据从基站发送到接入终端; 分配一个或多个反向链路CDMA载波以将数据从接入终端发送到基站; 并且限制对应于两个或更多个前向链路CDMA载波的反向链路开销传输。

公开(公告)号：US20100142479A1

公开(公告)日：2010-06-10

申请号：US12564607

申请日：2009-09-22

申请人： Peter J. Black ,  Christopher G. Lott ,  Rashid A. Attar ,  Yu-Cheun Jou ,  Jun Ma

发明人： Peter J. Black ,  Christopher G. Lott ,  Rashid A. Attar ,  Yu-Cheun Jou ,  Jun Ma

IPC分类号： H04W36/00

CPC分类号： H04W52/54 ,  H04B1/7107 ,  H04B1/71072 ,  H04L1/0048 ,  H04L1/0052 ,  H04L25/03006 ,  H04W36/18 ,  H04W52/08 ,  H04W52/12 ,  H04W52/362 ,  H04W52/40

摘要： Techniques for improving the capacity of a wireless communications system using interference cancellation (IC). In an early decoding and IC aspect, a frame transmitted from a user to a base station may be decoded prior to the entire frame being received by the base station. The remaining portion of the frame may then be re-constructed at the base station prior to its reception, and cancelled from the receive signal to reduce the interference to frames received from other users. In a power control aspect for early decoding and IC, the power control target level at a local base station may be adjusted in response to successfully early decoding a frame, without affecting the overall outer loop power control operation. Further aspects include late decoding techniques for utilizing the IC of other users' signals to improve the probability of decoding a given user's frames, as well as techniques for traffic channel demodulation using channel re-estimation.

公开(公告)号：US07477622B2

公开(公告)日：2009-01-13

申请号：US11046267

申请日：2005-01-28

申请人： Rashid A. Attar ,  Kiran Kiran

发明人： Rashid A. Attar ,  Kiran Kiran

IPC分类号： H04Q7/00

CPC分类号： H04W72/1263 ,  H04W28/18

摘要： A system to communicate a superposition coded packet from a base station to a plurality of remote stations. At the base station, from a list of user candidates for superposition coding a most deserving user may be determined. Those user candidates with a requested data rate less than that of the most deserving user may be eliminated. A superposition coded packet may be compiled from the remaining user candidates. On receipt, the most deserving user may process the superposition coded packet by assuming a predetermined power allocation. Further, if a user successfully in decodes early, power may be re-allocated to another user.

摘要翻译： 一种用于将叠加编码分组从基站传送到多个远程站的系统。 在基站，从用于叠加编码的用户候选者的列表中，可以确定最适用的用户。 可以消除具有小于最适合用户的请求数据速率的用户候选者。 可以从剩余的用户候选中编译叠加编码分组。 在接收时，最适合的用户可以通过假设预定的功率分配来处理叠加编码分组。 此外，如果用户成功地早期解码，则可以将功率重新分配给另一用户。

公开(公告)号：US07417957B2

公开(公告)日：2008-08-26

申请号：US10808939

申请日：2004-03-24

申请人： Nagabhushana T. Sindhushayana ,  Rashid A. Attar ,  Eduardo A. S. Esteves

发明人： Nagabhushana T. Sindhushayana ,  Rashid A. Attar ,  Eduardo A. S. Esteves

IPC分类号： H04L12/26 ,  H04B7/212

CPC分类号： H04L1/0021 ,  H04L1/0002 ,  H04L1/0016 ,  H04L1/002 ,  H04L1/0025 ,  Y02D50/10

摘要： A method and an apparatus for rate control in a high data rate (HDR) communication system are disclosed. An exemplary HDR communication system defines a set of data rates, at which an access point (AP) may send data packets to an access terminal (AT). The data rate is selected to maintain targeted packet error rate (PER). The AT's open loop algorithm measures received signal to interference and noise ratio (SINR) at regular intervals, and uses the information to predict an average SINR over the next packet duration. The AT's closed loop algorithm measures a packet error rate (PER) of the received signal, and uses the PER to calculate a closed loop correction factor. The loop correction factor is added to the SINR value predicted by the open loop, resulting in an adjusted SINR.

摘要翻译： 公开了一种用于高数据速率（HDR）通信系统中的速率控制的方法和装置。 示例性HDR通信系统定义了一组数据速率，接入点（AP）可在该组数据速率上向接入终端（AT）发送数据分组。 选择数据速率以维持目标分组错误率（PER）。 AT的开环算法以规则的间隔测量接收信号与干扰和噪声比（SINR），并且使用该信息来预测下一个分组持续时间内的平均SINR。 AT的闭环算法测量接收信号的分组错误率（PER），并使用PER计算闭环校正因子。 循环校正因子加到由开环预测的SINR值，得到调整后的SINR。

公开(公告)号：US07411923B2

公开(公告)日：2008-08-12

申请号：US10295660

申请日：2002-11-14

申请人： Rashid A. Attar ,  Christopher G. Lott

发明人： Rashid A. Attar ,  Christopher G. Lott

IPC分类号： H04Q7/00

CPC分类号： H04L1/0019 ,  H04L1/0002 ,  H04W28/22 ,  H04W72/082

摘要： Reverse Link (RL) data rate allocation in a High Data Rate (such as 1xEV-DO) system as a function of Forward Link (FL) channel quality. Rate shaping of a throughput profile for multiple Access Terminals (ATs) is performed by adjusting transition probabilities associated with a data rate allocation algorithm. The transition probabilities are adjusted to encourage transitions in a desired direction. In one embodiment, the transition probabilities are adjusted as a function of the FL Signal to Interference and Noise Ratio Ratio (SINR), such as measured per serving sector or as a captured sum total of FL SINR. In another embodiment, the transition probabilities are adjusted as a function of the historical loading condition of the system. In still another embodiment, the transition probabilities are adjusted as a function of differences in rise-over-thermal values between neighboring sectors.

摘要翻译： 作为前向链路（FL）信道质量的函数的高数据速率（例如1xEV-DO）系统中的反向链路（RL）数据速率分配。 通过调整与数据速率分配算法相关联的转换概率来执行多个接入终端（AT）的吞吐量简档的速率整形。 转移概率被调整以促进期望方向的转变。 在一个实施例中，转换概率被调整为根据FL信号与干扰和噪声比率（SINR）的函数，例如每服务扇区测量或作为FL SINR的捕获总和。 在另一个实施例中，根据系统的历史负载状况来调整转移概率。 在另一个实施例中，转移概率被调整为相邻扇区之间的上升热值的差异的函数。

公开(公告)号：US07280562B2

公开(公告)日：2007-10-09

申请号：US10368887

申请日：2003-02-18

申请人： Nagabhushana Sindhushayana ,  Rashid A. Attar ,  Ramin Rezaiifar

发明人： Nagabhushana Sindhushayana ,  Rashid A. Attar ,  Ramin Rezaiifar

IPC分类号： H04J3/24

CPC分类号： H04L12/5602 ,  H04L63/162

摘要： Method and apparatus for variable length Physical Layer (PL) packet generation. Multiple Security Layer (SL) packets may be multiplexed into a single PL packet to increase efficiency, wherein the SL packets may have variable lengths. In one embodiment, different format SL packets for different users are combined into capsules that form the PL packet. Shorter packets are for users in poor channel conditions or requiring smaller amounts of data due to the applications and the accompanying Quality of Service (QoS) requirements. In one embodiment, a modified Preamble structure provides for Unicast or multi-user packets. Alternate embodiment provides modified Rate Sets, a mechanism for identifying ACK from a single-user packet or a multiplexed packet (delayed ACK). ON/OFF keying for ACK channel v/s bi-polar keying used in IS-856, and/or multi-valued interpretation of DRC.

摘要翻译： 用于可变长度物理层（PL）分组生成的方法和装置。 多个安全层（SL）分组可以被多路复用到单个PL分组中以提高效率，其中SL分组可以具有可变长度。 在一个实施例中，用于不同用户的不同格式的SL分组被组合成形成PL分组的胶囊。 由于应用程序和随附的服务质量（QoS）要求，较短的数据包对于信道状况较差的用户或要求较少量的数据。 在一个实施例中，经修改的前导码结构提供单播或多用户分组。 替代实施例提供修改的速率集合，用于从单用户分组或复用分组（延迟ACK）识别ACK的机制。 IS-856中使用的ACK通道v / s双极键控的ON / OFF键控和/或DRC的多值解释。

公开(公告)号：US06741661B2

公开(公告)日：2004-05-25

申请号：US09863244

申请日：2001-05-22

申请人： Charles E. Wheatley, III ,  Rashid A. Attar

发明人： Charles E. Wheatley, III ,  Rashid A. Attar

IPC分类号： H04L2549

CPC分类号： H04B1/707 ,  H04B2201/70706 ,  H04L27/2624

摘要： A method and system that reduces the peak-to-average power ratio of a reverse link signal is described. A baseband structure implements a peak reduction technique using peak windowing. A non-rectangular window is used to distort the signal. One embodiment of the window is an inverted-raised cosine with the peak reduction a function of the relative difference in the squared-magnitude of the envelope relative to that of the desired peak-to-average power ratio. Multiple passes through the peak-reduction function may be performed until a desired target peak-to-average power ratio is achieved.

摘要翻译： 描述了降低反向链路信号的峰均功率比的方法和系统。 基带结构使用峰值窗口实现峰值缩减技术。 使用非矩形窗口来扭曲信号。 窗口的一个实施例是具有峰值减小的反升余弦，相对于期望的峰均功率比的平方幅度的相对差的函数。 可以执行多次通过峰值降低功能，直到达到期望的目标峰值与平均功率比。

公开(公告)号：US08797911B2

公开(公告)日：2014-08-05

申请号：US13401143

申请日：2012-02-21

申请人： Linhai He ,  Rashid A. Attar ,  Christopher G. Lott ,  Donna Ghosh ,  Chaitanya Mannemala ,  Sunit Bhatia ,  Sudheer Konda ,  Gopal Chillariga

发明人： Linhai He ,  Rashid A. Attar ,  Christopher G. Lott ,  Donna Ghosh ,  Chaitanya Mannemala ,  Sunit Bhatia ,  Sudheer Konda ,  Gopal Chillariga

IPC分类号： H04W52/02 ,  H04W24/00

CPC分类号： H04W52/0241 ,  H04W52/0232 ,  H04W52/0258 ,  H04W88/08 ,  Y02D70/1224 ,  Y02D70/1242 ,  Y02D70/142

摘要： A wireless communications power saving method and apparatus is provided. The method includes establishing a circular buffer configured to maintain a number of most recently encountered frame delay times and waiting a frame delay time after receiving a further frame before the station enters a power save state. Frame delay time is a period equal to a largest most recently encountered frame delay period in the circular buffer. The method further determines, at a station, a dormancy time based on a number of data frames received since the station transitioned from an inactive mode to an active mode, a packet transmission rate, and a data frame time interval representing time between data frames received at the station, and causes the station to switch to a further inactive mode if a next packet is not received within the dormancy time after receipt of a previous packet.

摘要翻译： 提供一种无线通信省电方法和装置。 该方法包括建立循环缓冲器，该循环缓冲器被配置为保持最近遇到的帧延迟时间的数量，并且在站进入省电状态之前在接收到另一帧之后等待帧延迟时间。 帧延迟时间是等于循环缓冲器中最大遇到的最大帧延迟周期的周期。 该方法还在一个站点基于从站从非活动模式转换到活动模式，分组传输速率和表示接收到的数据帧之间的时间的数据帧时间间隔，接收到的数据帧数，在一个站处确定休眠时间 并且如果在接收到先前分组之后的休眠时间内没有接收到下一分组，则使得站切换到另一非活动模式。

公开(公告)号：US08645501B2

公开(公告)日：2014-02-04

申请号：US13101520

申请日：2011-05-05

申请人： Donna Ghosh ,  Mark Bapst ,  Christopher G. Lott ,  Rashid A. Attar ,  George Cherian ,  Linhai He ,  Dinesh K. Garg

发明人： Donna Ghosh ,  Mark Bapst ,  Christopher G. Lott ,  Rashid A. Attar ,  George Cherian ,  Linhai He ,  Dinesh K. Garg

IPC分类号： G06F15/16

CPC分类号： H04L61/6009 ,  G06F17/30902 ,  H04L61/1511

摘要： Methods and apparatus for obtaining web content are disclosed. The method includes identifying resources identified by domain name references that a user may request, obtaining a status of at least one operating condition that affects operations of the communication device, fetching, in advance of the user requesting the content, network addresses of the resources so as to resolve the domain name references, and adapting a level of the fetching based upon the at least one operating condition. The network addresses of the resources are cached so as to generate cached network addresses, and if the user requests the content, the cached network addresses are utilized to access the resources associated with the content.

摘要翻译： 公开了获取网页内容的方法和装置。 该方法包括识别由用户可能请求的域名引用识别的资源，获得影响通信设备的操作的至少一个操作条件的状态，在请求内容的用户之前提取资源的网络地址，从而 以解决域名引用，以及基于所述至少一个操作条件来适配所述提取的级别。 资源的网络地址被缓存以生成缓存的网络地址，并且如果用户请求内容，则使用缓存的网络地址来访问与内容相关联的资源。

公开(公告)号：US08498308B2

公开(公告)日：2013-07-30

申请号：US11592568

申请日：2006-11-03

申请人： Eduardo A. S. Esteves ,  Rashid A. Attar ,  Nagabhushana T. Sindhushayana

发明人： Eduardo A. S. Esteves ,  Rashid A. Attar ,  Nagabhushana T. Sindhushayana

IPC分类号： H04W28/04

CPC分类号： H04W16/02 ,  H04W28/04 ,  H04W28/18

摘要： In a high data rate communication system capable of variable rate transmission, an open loop rate control can be adjusted with a closed loop rate control to maximize throughput. An access point generates interleaved multi-slot packets that allow an access terminal to transmit indicator messages to the access point in accordance with recently received data carried within slots of the multi-slot packets.

摘要翻译： 在能够进行可变速率传输的高数据速率通信系统中，可以通过闭环速率控制来调整开环速率控制以最大化吞吐量。 接入点产生交错多时隙分组，其允许接入终端根据在多时隙分组的时隙内承载的最近接收的数据向接入点发送指示符消息。