公开(公告)号：US07609773B2

公开(公告)日：2009-10-27

申请号：US11174108

申请日：2005-06-29

申请人： Naga Bhushan ,  June Namgoong ,  Peter J. Black

发明人： Naga Bhushan ,  June Namgoong ,  Peter J. Black

IPC分类号： H04L27/28 ,  H03D1/00

CPC分类号： H04L27/2662 ,  H04L25/022 ,  H04L27/2665

摘要： In one embodiment, the invention comprises a channel estimation method, comprising determining a FFT window position, and calculating a delay spread. In another embodiment, the step of determining a FFT window position comprises setting an initial position of the FFT window, computing an energy for each tap, time averaging said energy for each tap, comparing an average energy of each tap with a first threshold multiplied by the average energy of all taps, comparing the average energy of each tap with a second threshold multiplied by a maximum average energy in alias components, updating the set of paths if the average energy of the tap is greater than said second threshold multiplied by the maximum average energy in alias components; and refining the FFT window position.

摘要翻译： 在一个实施例中，本发明包括信道估计方法，包括确定FFT窗口位置，并计算延迟扩展。 在另一个实施例中，确定FFT窗口位置的步骤包括设置FFT窗口的初始位置，计算每个抽头的能量，对每个抽头的所述能量进行平均的时间，将每个抽头的平均能量与乘以 所有抽头的平均能量，将每个抽头的平均能量与第二阈值乘以别名分量中的最大平均能量，如果抽头的平均能量大于所述第二阈值乘以最大值，则更新该组路径 别名成分中的平均能量; 并精简FFT窗口位置。

公开(公告)号：US20090264123A1

公开(公告)日：2009-10-22

申请号：US12423513

申请日：2009-04-14

申请人： Parag A. Agashe ,  Naga Bhushan

发明人： Parag A. Agashe ,  Naga Bhushan

IPC分类号： H04W24/00

CPC分类号： H04W48/20 ,  H04W36/30

摘要： Techniques for selecting a serving base station for a terminal by taking into consideration the backhaul quality of candidate base stations are described. In one design, a base station may determine backhaul quality information indicative of its current backhaul quality. The base station may send the backhaul quality information, e.g., in an overhead message sent over the air to terminals or in a backhaul message sent to neighbor base stations or a network controller. A server selection entity may receive backhaul quality information for at least one candidate base station for the terminal. The server selection entity may also determine at least one metric for each candidate base station. The server selection entity may then select the serving base station for the terminal based on the backhaul quality information and the at least one metric for the at least one candidate base station.

摘要翻译： 描述了通过考虑候选基站的回程质量来选择用于终端的服务基站的技术。 在一种设计中，基站可以确定指示其当前回程质量的回程质量信息。 基站可以发送回程质量信息，例如，在通过空中发送的开销消息中发送到终端或发送到邻近基站或网络控制器的回程消息。 服务器选择实体可以为终端的至少一个候选基站接收回程质量信息。 服务器选择实体还可以确定每个候选基站的至少一个度量。 然后，服务器选择实体可以基于回程质量信息和至少一个候选基站的至少一个度量来选择终端的服务基站。

公开(公告)号：US20090201846A1

公开(公告)日：2009-08-13

申请号：US12365777

申请日：2009-02-04

申请人： Gavin B. Horn ,  Avneesh Agrawal ,  Ashwin Sampath ,  Alexei Y. Gorokhov ,  Naga Bhushan

发明人： Gavin B. Horn ,  Avneesh Agrawal ,  Ashwin Sampath ,  Alexei Y. Gorokhov ,  Naga Bhushan

IPC分类号： H04B7/14 ,  H04W74/04 ,  H04W72/00

CPC分类号： H04W72/1263 ,  H04W72/00 ,  H04W72/04 ,  H04W72/0486 ,  H04W84/047 ,  H04W84/18 ,  H04W88/04

摘要： Systems and methodologies are described that facilitate scheduling over multiple hops in a wireless communication network. Radio resources can be partitioned into sets of sub-frames that can be allocated statically and/or dynamically. Statically allocated radio resources can be reassigned over time based on the loading on each hop and/or throughput imbalance. In addition, dynamic assignment of sub-frames to each hop can be based on traffic or channel conditions. Moreover, the radio resources can be dynamically allocated in a distributed scheme, wherein a base station controls the scheduling of resources, or a centralized scheme, wherein a relay station controls the scheduling of resources. Furthermore the allocation of radio resources can be transparent or explicit. In the transparent case, the access terminal listens directly to the base station, and the relay station does not transmit control information, such as DL or UL assignments. Conversely, when the allocation of resources is explicit the relay station does transmit control information.

摘要翻译： 描述了有助于在无线通信网络中的多跳上进行调度的系统和方法。 无线电资源可以被划分成静态和/或动态分配的子帧集合。 基于每跳和/或吞吐量不平衡的负载，可以随时间重新分配静态分配的无线电资源。 此外，每个跳跃的子帧的动态分配可以基于业务或信道条件。 此外，无线电资源可以以分布式方案动态分配，其中基站控制资源的调度或集中式方案，其中中继站控制资源的调度。 此外，无线电资源的分配可以是透明或明确的。 在透明情况下，接入终端直接监听基站，中继站不发送DL或UL分配等控制信息。 相反，当资源分配明确时，中继站确实发送控制信息。

公开(公告)号：US20090197603A1

公开(公告)日：2009-08-06

申请号：US12331156

申请日：2008-12-09

申请人： Tingfang Ji ,  Aamod D. Khandekar ,  Naga Bhushan ,  Alexei Y. Gorokhov ,  Avneesh Agrawal

发明人： Tingfang Ji ,  Aamod D. Khandekar ,  Naga Bhushan ,  Alexei Y. Gorokhov ,  Avneesh Agrawal

IPC分类号： H04W36/00

CPC分类号： H04W36/0083 ,  Y02D70/00 ,  Y02D70/1222 ,  Y02D70/1242 ,  Y02D70/1262 ,  Y02D70/142 ,  Y02D70/146

摘要： Techniques for selecting a serving base station for a terminal in a wireless communication network are described. In one design, multiple candidate base stations for the terminal may be identified, with each candidate base station being a candidate for selection as the serving base station for the terminal. The multiple candidate base stations may include base stations with different transmit power levels and/or may support interference mitigation. One of the multiple candidate base stations may be selected as the serving base station. In one design, the serving base station may be selected based on at least one metric for each candidate base station. The at least one metrics may be for pathloss, effective transmit power, effective geometry, projected data rate, control channel reliability, network utility, etc. The selected candidate base station may have a lower SINR than a highest SINR among the multiple candidate base stations.

摘要翻译： 描述了用于在无线通信网络中为终端选择服务基站的技术。 在一种设计中，可以识别用于终端的多个候选基站，其中每个候选基站是用于选择的候选作为终端的服务基站。 多个候选基站可以包括具有不同发射功率电平的基站和/或可以支持干扰减轻。 可以选择多个候选基站中的一个作为服务基站。 在一种设计中，可以基于每个候选基站的至少一个度量来选择服务基站。 所述至少一个度量可以用于路径损耗，有效发射功率，有效几何，投影数据速率，控制信道可靠性，网络效用等。所选择的候选基站可以具有比多个候选基站中的最高SINR更低的SINR 。

公开(公告)号：US20090086629A1

公开(公告)日：2009-04-02

申请号：US12190696

申请日：2008-08-13

申请人： Danlu Zhang ,  Naga Bhushan ,  Rajesh Kumar Pankaj

发明人： Danlu Zhang ,  Naga Bhushan ,  Rajesh Kumar Pankaj

IPC分类号： H04L12/56

CPC分类号： H04W28/16

摘要： Techniques for performing admission control based on quality-of-service (QoS) performance in a wireless communication network are described. QoS performance (e.g., delay or throughput performance) of admitted data flows may be determined. Whether to admit or reject a new data flow may then be determined based on the QoS performance of the admitted data flows. The admitted and new data flows may have delay bounds. The QoS performance of the admitted data flows may be given by a measured sector delay, which may be determined based on actual delays of packets. A measured flow delay for each admitted data flow may be determined based on delays of packets for that flow. The measured sector delay may then be determined based on the measured flow delays for all admitted data flows. The new data flow may be admitted if the measured sector delay is less than a delay threshold.

摘要翻译： 描述了用于在无线通信网络中基于服务质量（QoS）性能执行准入控制的技术。 可以确定允许的数据流的QoS性能（例如，延迟或吞吐量性能）。 然后可以基于允许的数据流的QoS性能来确定是否允许或拒绝新的数据流。 承认的和新的数据流可能有延迟的界限。 允许的数据流的QoS性能可以由测量的扇区延迟来给出，其可以基于分组的实际延迟来确定。 可以基于该流的分组的延迟来确定每个被允许的数据流的测量流延迟。 然后可以基于所测量的所有允许数据流的流量延迟来确定所测量的扇区延迟。 如果测量的扇区延迟小于延迟阈值，则可以允许新的数据流。

公开(公告)号：US20080161033A1

公开(公告)日：2008-07-03

申请号：US11848865

申请日：2007-08-31

申请人： Mohammad Jaber Borran ,  Aamod Khandekar ,  Tingfang Ji ,  Alexei Gorokhov ,  Naga Bhushan ,  Xin Zhang ,  Arumugam Chendamarai Kannan

发明人： Mohammad Jaber Borran ,  Aamod Khandekar ,  Tingfang Ji ,  Alexei Gorokhov ,  Naga Bhushan ,  Xin Zhang ,  Arumugam Chendamarai Kannan

IPC分类号： H04B7/06

CPC分类号： H04W24/02 ,  H04W52/16 ,  H04W52/243 ,  H04W52/44

摘要： Systems and methodologies are described that provide techniques for performing adjustments for delta-based power control and interference management in a wireless communication system. A terminal can utilize one or more delta-based power control techniques described herein upon engaging in a reverse link transmission after a predetermined period of silence or after receiving indications of interference from neighboring access points. A delta value can be computed through open-loop projection, based on which transmission resources such as bandwidth and/or transmit power can be increased or decreased to manage interference caused by the terminal. A delta value, other feedback from the terminal, and/or indications of interference caused by the terminal can also be communicated as feedback to a serving access point to allow the access point to assign transmission resources for the terminal.

摘要翻译： 描述了提供用于在无线通信系统中执行基于增量的功率控制和干扰管理的调整的技术的系统和方法。 在预定的静默期之后或在接收到来自相邻接入点的干扰的指示之后，终端可以利用本文所述的一个或多个基于增量的功率控制技术参与反向链路传输。 可以通过开环投影来计算增量值，基于可以增加或减少诸如带宽和/或发射功率的传输资源来管理由终端引起的干扰。 来自终端的增量值，其他反馈和/或由终端引起的干扰的指示也可以作为反馈传送到服务接入点，以允许接入点为终端分配传输资源。

公开(公告)号：US07376209B2

公开(公告)日：2008-05-20

申请号：US10456148

申请日：2003-06-06

申请人： June Namgoong ,  Jun Ma ,  Mingxi Fan ,  Naga Bhushan ,  Peter Black

发明人： June Namgoong ,  Jun Ma ,  Mingxi Fan ,  Naga Bhushan ,  Peter Black

IPC分类号： H03D1/00 ,  H04L27/06

CPC分类号： H03M13/3927 ,  H03M13/2957 ,  H03M13/658 ,  H04L1/0045 ,  H04L1/0066 ,  H04L1/1812 ,  H04L1/1825 ,  Y10S370/912

摘要： A method and an apparatus for scaling demodulated data symbols contained in a packet to generate scaled log-likelihood ratios for Turbo decoding are disclosed. A packet consists of one or more subpackets depending on the type of packet. Each subpacket is identified by a subpacket identification number. The payload size of the packet and the subpacket identification number may be determined by decoding a reverse rate indicator (RRI) channel. A scale factor which is associated with a specific subpacket identification number and a specific payload size results in a performance measure that is closest to an expected performance measure. The scale factor is used for scaling the demodulated data symbols to generate scaled log-likelihood ratios for Turbo decoding.

摘要翻译： 公开了一种用于缩放分组中包含的解调数据符号以产生用于Turbo解码的缩放对数似然比的方法和装置。 数据包由一个或多个子数据包组成，具体取决于数据包的类型。 每个子分组由子分组标识号码标识。 可以通过解码反向速率指示符（RRI）信道来确定分组的有效载荷大小和子分组标识号码。 与特定子分组标识号和特定有效载荷大小相关联的比例因子导致最接近预期性能测量的性能度量。 缩放因子用于缩放解调的数据符号以产生用于Turbo解码的缩放的对数似然比。

公开(公告)号：US20070268848A1

公开(公告)日：2007-11-22

申请号：US11748878

申请日：2007-05-15

申请人： Aamod Khandekar ,  Naga Bhushan

发明人： Aamod Khandekar ,  Naga Bhushan

IPC分类号： H04L5/14 ,  H04L5/16

CPC分类号： H04B7/2656 ,  H04B7/2628

摘要： Systems and methodologies are described that provide half-duplex communication in a frequency division duplex (FDD) system. Communications in an FDD system may be divided into half-duplex interlaces, wherein a terminal may receive at one time period and transmit at another time period. An access network in an FDD system may then utilize half-duplex communication to communicate with an access terminal that is not capable of transmitting and receiving simultaneously by using a half-duplex interlace. Further, an access network may also utilize full-duplex communication to communicate with an access terminal that is capable of transmitting and receiving simultaneously.

摘要翻译： 描述了在频分双工（FDD）系统中提供半双工通信的系统和方法。 FDD系统中的通信可以被划分为半双工交错，其中终端可以在一个时间段接收并在另一时间段进行发送。 然后，FDD系统中的接入网络可以利用半双工通信来与不能够通过使用半双工交错同时进行发送和接收的接入终端进行通信。 此外，接入网络还可以利用全双工通信来与能够同时发送和接收的接入终端进行通信。

公开(公告)号：US20070195899A1

公开(公告)日：2007-08-23

申请号：US11676952

申请日：2007-02-20

申请人： Naga Bhushan ,  Alexei Gorokhov

发明人： Naga Bhushan ,  Alexei Gorokhov

IPC分类号： H04K1/10

CPC分类号： H04L5/1438 ,  H04B7/0452 ,  H04B7/0626 ,  H04B7/063 ,  H04B7/0639 ,  H04J13/0044 ,  H04L1/0002 ,  H04L1/0025 ,  H04L1/0028 ,  H04L1/06 ,  H04L1/1671 ,  H04L1/1812 ,  H04L5/0026 ,  H04L5/0048 ,  H04L5/023 ,  H04L25/0204 ,  H04L25/0206 ,  H04L25/0226 ,  H04L27/2613 ,  H04W28/06 ,  H04W28/18 ,  H04W48/08 ,  Y02D70/1222 ,  Y02D70/1224 ,  Y02D70/1242 ,  Y02D70/1262 ,  Y02D70/144 ,  Y02D70/23 ,  Y02D70/24 ,  Y02D70/444

摘要： Techniques for efficiently sending data in a wireless communication system are described. Time frequency resources available for orthogonal frequency division multiplexing (OFDM), which exclude time frequency resources used for traffic data and signaling sent with code division multiplexing (CDM), may be determined. The time frequency resources available for OFDM may be partitioned into multiple tiles. Each tile may be defined based on multiple OFDM symbol numerologies and may have a non-rectangular shape. Each terminal may be assigned at least one tile. A pilot pattern may be selected for each terminal from among multiple pilot patterns, which may support different delay spreads, spatial ranks, etc. Data and pilot may be exchanged with each terminal via the time frequency resources in the at least one tile assigned to the terminal. OFDM symbols may be processed based on multiple OFDM symbol numerologies for each assigned tile.

摘要翻译： 描述用于在无线通信系统中有效发送数据的技术。 可以确定可用于正交频分复用（OFDM）的时间频率资源，其排除用于业务数据的时间频率资源和用码分多路复用（CDM）发送的信令。 可用于OFDM的时间频率资源可以被划分为多个瓦片。 可以基于多个OFDM符号数学来定义每个瓦片，并且可以具有非矩形形状。 每个终端可以被分配至少一个瓦片。 可以从多个导频模式中的每个终端选择导频模式，这可以支持不同的延迟扩展，空间等级等。数据和导频可以经由分配给该终端的至少一个瓦片中的时间频率资源与每个终端进行交换 终奌站。 可以基于每个分配的瓦片的多个OFDM符号数学来处理OFDM符号。

公开(公告)号：US20060291389A1

公开(公告)日：2006-12-28

申请号：US11512881

申请日：2006-08-29

申请人： Rashid Attar ,  Naga Bhushan

发明人： Rashid Attar ,  Naga Bhushan

IPC分类号： H04L12/26 ,  H04L12/56

CPC分类号： H04W74/0891 ,  H04W52/146 ,  H04W52/16 ,  H04W52/26 ,  H04W52/48

摘要： Methods and apparatus for a data transmission in a communication system are disclosed. Each of a subset of plural access terminals desiring to transmit user data in an interval transmits a request to transmit in the interval to an access network. The access network makes a decision to schedule at least one of the subset of the plural access terminals to transmit in the interval in accordance with the request. At least one access point of the access network transmits the decision to the plural access terminals.

摘要翻译： 公开了一种在通信系统中进行数据传输的方法和装置。 期望在间隔中发送用户数据的多个接入终端的子集中的每一个将间隔中的发送请求发送到接入网络。 所述接入网络作出决定，按照所述请求，在所述间隔内调度所述多个接入终端的所述子集中的至少一个进行发送。 接入网的至少一个接入点将决定发送到多个接入终端。