公开(公告)号：US07554948B2

公开(公告)日：2009-06-30

申请号：US11147830

申请日：2005-06-07

申请人： Ayman Fawzy Naguib ,  Alexei Gorokhov ,  Dhananjay Gore ,  Tingfang Ji ,  Arak Sutivong

发明人： Ayman Fawzy Naguib ,  Alexei Gorokhov ,  Dhananjay Gore ,  Tingfang Ji ,  Arak Sutivong

IPC分类号： H04W4/00

CPC分类号： H04L1/1819 ,  H04B2001/7152 ,  H04L5/0023 ,  H04L25/0224

摘要： To receive packets with interference cancellation, block transmissions for the packets are received on time-frequency blocks used by these packets. Receiver spatial processing is performed on input symbols to obtain detected symbols. Each packet is demodulated and decoded based on all detected symbols obtained for all block transmissions received for the packet. For each packet that is decoded correctly, the transmission for the packet is terminated, the interference due to the packet is estimated, and the estimated interference is subtracted from the input symbols for all time-frequency blocks used by the packet. Receiver spatial processing is performed on the interference-canceled symbols to obtain new detected symbols for all time-frequency blocks used by all correctly decoded packets. Each packet decoded in error and overlapping at least partially with any correctly decoded packet may be demodulated and decoded based on all detected symbols available for that packet.

摘要翻译： 为了接收具有干扰消除的分组，在这些分组使用的时间 - 频率块上接收分组的块传输。 对输入符号执行接收机空间处理以获得检测符号。 基于为分组接收到的所有块传输获得的所有检测到的符号，对每个分组进行解调和解码。 对于正确解码的每个分组，分组的传输被终止，估计由于分组引起的干扰，并且从分组使用的所有时间频率块的输入符号中减去所估计的干扰。 对干扰消除的符号进行接收机空间处理，以获得由所有正确解码的分组使用的所有时间频率块的新的检测符号。 至少部分地与任何正确解码的分组进行错误解码和重叠的每个分组可以基于可用于该分组的所有检测到的符号进行解调和解码。

公开(公告)号：US07512412B2

公开(公告)日：2009-03-31

申请号：US11158587

申请日：2005-06-21

申请人： Murat Mese ,  Ayman Fawzy Naguib ,  Arak Sutivong ,  Dhananjay Gore ,  Alexei Gorokhov ,  Tingfang Ji

发明人： Murat Mese ,  Ayman Fawzy Naguib ,  Arak Sutivong ,  Dhananjay Gore ,  Alexei Gorokhov ,  Tingfang Ji

IPC分类号： H04B7/00 ,  H04Q7/20

CPC分类号： H04W52/243 ,  H04W52/34

摘要： Techniques for controlling transmit power and the amount of overlapping in a quasi-orthogonal system are described. A base station for a sector receives transmissions from terminals in that sector and neighbor sectors and determines performance metrics (e.g., overall throughput) and/or QoS metrics (e.g., minimum data rate) for the terminals in the sector. The base station updates an overlapping factor based on the performance metrics and updates a QoS power control parameter based on the QoS metrics. The overlapping factor indicates the average number of overlapping transmissions sent simultaneously on each time-frequency block usable for data transmission. The QoS power control parameter ensures that the terminals in the sector can achieve minimum QoS requirements. A power control mechanism with multiple loops is used to adjust the transmit power of each terminal. The overlapping factor and QoS power control parameter are updated by two of the loops.

摘要翻译： 描述了用于控制发射功率的技术和准正交系统中的重叠量。 用于扇区的基站从该扇区和相邻扇区中的终端接收传输，并确定扇区中的终端的性能度量（例如总吞吐量）和/或QoS度量（例如，最小数据速率）。 基站基于性能度量来更新重叠因子，并且基于QoS度量来更新QoS功率控制参数。 重叠因子表示可用于数据传输的每个时间频率块上同时发送的重叠传输的平均数。 QoS功率控制参数确保了扇区中的终端可以达到最低的QoS要求。 使用具有多个环路的功率控制机构来调整每个终端的发射功率。 重叠因子和QoS功率控制参数由两个循环更新。

公开(公告)号：US20090075596A1

公开(公告)日：2009-03-19

申请号：US12142480

申请日：2008-06-19

申请人： Alexei Gorokhov ,  Avneesh Agrawal ,  Naga Bhushan ,  Tingfang Ji

发明人： Alexei Gorokhov ,  Avneesh Agrawal ,  Naga Bhushan ,  Tingfang Ji

IPC分类号： H04B17/00

CPC分类号： H04W16/04 ,  H04L1/0026

摘要： Systems and methodologies are described that facilitate employing distributed frequency planning and reuse factor optimization based upon forward link and/or reverse link interference management techniques. An optimal reuse factor for a base station can be determined based upon a metric that evaluates levels of service associated with neighboring base stations. Moreover, a subset of available resource sets can be selected for use by the base station; thus, a base station specific collection of resource sets can be formed through such selection. Further, mappings of each resource set to a set of physical resources can be disseminated in a network or portion thereof. According to another example, frequency hopping can be constrained to use of resources within a resource set (rather than across more than one resource set) as provided in a base station specific hopping pattern.

摘要翻译： 描述了有助于采用基于前向链路和/或反向链路干扰管理技术的分布式频率规划和重用因子优化的系统和方法。 可以基于评估与相邻基站相关联的服务等级的度量来确定基站的最佳重用因子。 此外，可以选择可用资源集的子集供基站使用; 因此，可以通过这样的选择来形成基站特定资源集合。 此外，每个资源集合对一组物理资源的映射可以在网络或其一部分中传播。 根据另一示例，跳频可以被限制为使用资源集合（而不是跨越多于一个资源集合）的资源，如在基站特定跳频模式中所提供的。

公开(公告)号：US20080188234A1

公开(公告)日：2008-08-07

申请号：US11877617

申请日：2007-10-23

申请人： Alexei Gorokhov ,  Aamod Khandekar ,  Tingfang Ji ,  Naga Bhushan

发明人： Alexei Gorokhov ,  Aamod Khandekar ,  Tingfang Ji ,  Naga Bhushan

IPC分类号： H04Q7/20 ,  H04M1/00

CPC分类号： H04W72/082 ,  H04B17/345 ,  H04W24/02 ,  H04W72/0406 ,  H04W72/085

摘要： Enabling resource partitioning in a wireless communication is provided. A terminal can measure channel quality and other information in a wireless communication environment and prepare a VCQI report. The report can be transmitted to a serving base station and/or non-serving base stations. The report information can be utilized by the base stations to allocate resources and/or to facilitate handoff within the wireless communication environment.

摘要翻译： 提供了在无线通信中启用资源划分。 终端可以在无线通信环境中测量信道质量和其他信息，并准备VCQI报告。 报告可以被发送到服务基站和/或非服务基站。 报告信息可被基站利用以分配资源和/或促进无线通信环境内的切换。

公开(公告)号：US20080175185A1

公开(公告)日：2008-07-24

申请号：US11848755

申请日：2007-08-31

申请人： Tingfang Ji ,  Rajat Prakash ,  Mohammad J. Borran ,  Alexei Gorokhov

发明人： Tingfang Ji ,  Rajat Prakash ,  Mohammad J. Borran ,  Alexei Gorokhov

IPC分类号： H04B7/185

CPC分类号： H04W52/247 ,  H04W52/243 ,  H04W52/248

摘要： Systems and methodologies are described that provide techniques for generating and utilizing reverse link feedback for interference management in a wireless communication system. Channel quality and/or interference data can be obtained by a terminal from a serving sector and one or more neighboring sectors, from which an interference-based headroom value can be computed that contains interference caused by the terminal to an allowable range. The interference-based headroom value can then be provided with power amplifier (PA) headroom feedback to the serving sector. Based on the provided feedback from the terminal, the serving sector can assign resources for use by the terminal in communication with the serving sector. Further, the serving sector may choose to honor or disregard a received interference-based power value based on quality of service and/or other system parameters.

摘要翻译： 描述了提供用于在无线通信系统中生成和利用反向链路反馈用于干扰管理的技术的系统和方法。 信道质量和/或干扰数据可以由来自服务扇区和一个或多个相邻扇区的终端获得，从该终端可以计算包含由终端引起的干扰到允许范围的基于干扰的净空值。 然后可以向服务扇区提供功率放大器（PA）净空反馈的基于干扰的余量值。 基于提供的来自终端的反馈，服务扇区可以分配资源供终端与服务扇区进行通信。 此外，服务部门可以选择基于服务质量和/或其他系统参数来尊重或忽视接收到的基于干扰的功率值。

公开(公告)号：US20080117849A1

公开(公告)日：2008-05-22

申请号：US11848664

申请日：2007-08-31

申请人： Mohammad J. Borran ,  Tingfang Ji ,  Arumugam Chendamari Kannan ,  Alexei Gorokhov ,  Aamod Khandekar

发明人： Mohammad J. Borran ,  Tingfang Ji ,  Arumugam Chendamari Kannan ,  Alexei Gorokhov ,  Aamod Khandekar

IPC分类号： G08C17/00

CPC分类号： H04W52/243

摘要： Systems and methodologies are described that provide techniques for generating and utilizing reverse link feedback for interference management in a wireless communication system. Other Sector Interference (OSI) indicators are transmitted from an interfering access point to an access terminal. At the access terminal, an appropriate delta value(s) is combined with the received OSI indicators. The combined information is transmitted to the access point in a feedback so the serving sector access point can analyze the amount of interference. Based on the provided feedback from the terminal, the serving sector access point can assign resources for use by the terminal in communication with the serving sector.

摘要翻译： 描述了提供用于在无线通信系统中生成和利用反向链路反馈用于干扰管理的技术的系统和方法。 其他扇区干扰（OSI）指示符从干扰接入点发送到接入终端。 在接入终端，将适当的增量值与所接收的OSI指示符组合。 组合信息在反馈中被发送到接入点，因此服务扇区接入点可以分析干扰量。 基于提供的来自终端的反馈，服务扇区接入点可以分配资源供终端与服务扇区进行通信。

公开(公告)号：US20070060178A1

公开(公告)日：2007-03-15

申请号：US11260924

申请日：2005-10-27

申请人： Alexei Gorokhov ,  Tingfang Ji

发明人： Alexei Gorokhov ,  Tingfang Ji

IPC分类号： H04B7/00

CPC分类号： H04L5/006 ,  H04L1/0002 ,  H04L1/0009 ,  H04L1/0026 ,  H04L1/1812 ,  H04L5/0007 ,  H04L5/0044 ,  H04L5/0048 ,  H04L5/0057 ,  H04L5/0064 ,  H04L5/1438 ,  H04L25/0398

摘要： Systems and methods of scheduling sub-carriers in an OFDMA system in which a scheduler takes into account channel conditions experienced by the communication devices to optimize channel conditions. The scheduler can partition a set of sub-carriers spanning an operating bandwidth into a plurality of segments. The segments can include a plurality of global segments that each includes a distinct non-contiguous subset of the sub-carriers spanning substantially the entire operating bandwidth. One or more of the global segments can be further partitioned into a plurality of local segments that each has a bandwidth that is less than a channel coherence bandwidth. The scheduler determines channel characteristics experienced by each communication device via reporting or channel estimation, and allocates one or more segments to communication links for each device according to the channel characteristics.

摘要翻译： 在OFDMA系统中调度子载波的系统和方法，其中调度器考虑通信设备经历的信道条件以优化信道状况。 调度器可以将跨越工作带宽的一组子载波划分成多个段。 这些段可以包括多个全局段，每个全局段包括基本上跨整个工作带宽的子载波的不同的非连续子集。 一个或多个全局段可被进一步分割成多个本地段，每个本地段具有小于信道相干带宽的带宽。 调度器通过报告或信道估计来确定每个通信设备经历的信道特征，并根据信道特性为每个设备的通信链路分配一个或多个分段。

公开(公告)号：US20060209754A1

公开(公告)日：2006-09-21

申请号：US11129140

申请日：2005-05-13

申请人： Tingfang Ji ,  Ayman Naguib ,  Arak Sutivong ,  Dhananjay Gore ,  Alexei Gorokhov

发明人： Tingfang Ji ,  Ayman Naguib ,  Arak Sutivong ,  Dhananjay Gore ,  Alexei Gorokhov

IPC分类号： H04Q7/00

CPC分类号： H04J11/005 ,  H04B1/7143

摘要： A channel structure has at least two channel sets. Each channel set contains multiple channels and is associated with a specific mapping of the channels to the system resources available for data transmission. Each channel set may be defined based on a channel tree having a hierarchical structure. To achieve intra-cell interference diversity, the channel-to-resource mapping for each channel set is pseudo-random with respect to the mapping for each remaining channel set. In each scheduling interval, terminals are scheduled for transmission on the forward and/or reverse link. The scheduled terminals are assigned channels from the channel sets. Multiple terminals may use the same system resources and their overlapping transmissions may be separated in the spatial domain. For example, beamforming may be performed to send multiple overlapping transmissions on the forward link, and receiver spatial processing may be performed to separate out multiple overlapping transmissions received on the reverse link.

公开(公告)号：US08488487B2

公开(公告)日：2013-07-16

申请号：US13326062

申请日：2011-12-14

申请人： Mohammad J. Borran ,  Alexei Gorokhov ,  Aamod Khandekar ,  Tingfang Ji ,  Aru Chendamarai Kannan

发明人： Mohammad J. Borran ,  Alexei Gorokhov ,  Aamod Khandekar ,  Tingfang Ji ,  Aru Chendamarai Kannan

IPC分类号： H04L12/26

CPC分类号： H04W72/082

摘要： Systems and methods that facilitate management of interference and communication resources are provided. A differential approach is devised in which other-sector interference (OSI) and communication resources are managed by adjusting an offset (delta) value associated with the resources in response to receiving an indication of other-sector interference. An OSI indication can be issued based on a short and a long time scale, and effective interference metrics over time-frequency resources. The adjusted delta value is communicated to a serving access point, which reassigns communication resources in order to mitigate other-sector interference.

摘要翻译： 提供了便于管理干扰和通信资源的系统和方法。 设计出差分方法，其中响应于接收到其他扇区干扰的指示，通过调整与资源相关联的偏移量（delta）值来管理其他扇区干扰（OSI）和通信资源。 可以基于短时间和长时间尺度发出OSI指示，并且可以根据时间 - 频率资源发出有效的干扰度量。 经调整的增量值被传送到服务接入点，服务接入点重新分配通信资源以便减轻其他扇区干扰。

公开(公告)号：US08045988B2

公开(公告)日：2011-10-25

申请号：US12818078

申请日：2010-06-17

申请人： Arak Sutivong ,  Ayman Fawzy Naguib ,  Dhananjay Gore ,  Alexei Gorokhov ,  Tingfang Ji

发明人： Arak Sutivong ,  Ayman Fawzy Naguib ,  Dhananjay Gore ,  Alexei Gorokhov ,  Tingfang Ji

IPC分类号： H04W36/00

CPC分类号： H04B1/713 ,  H04B7/022 ,  H04B7/0491 ,  H04L5/0012 ,  H04L5/0023 ,  H04L5/0048 ,  H04L5/006 ,  H04L5/0069 ,  H04L25/0226 ,  H04L27/2613 ,  H04W36/18 ,  H04W48/08

摘要： Transmission patterns for pilot symbols transmitted from a mobile station or base station are provided. The patterns may be selected according to a location of the mobile station with respect to one or more antennas are provided. In some aspects, the pattern may be selected based upon the distance between the mobile station and the one or more antennas. In other aspect, the pattern may be based upon whether the mobile station is in handoff.

摘要翻译： 提供从移动台或基站发送的导频符号的传输模式。 可以根据移动台相对于一个或多个天线的位置来选择模式。 在一些方面，可以基于移动台与一个或多个天线之间的距离来选择该模式。 在另一方面，该模式可以基于移动台是否处于切换状态。