公开(公告)号：US08483168B2

公开(公告)日：2013-07-09

申请号：US13556094

申请日：2012-07-23

申请人： Tingfang Ji ,  Aamod Dinkar Khandekar ,  Naga Bhushan ,  Alexei Yurievitch Gorokhov ,  Avneesh Agrawal

发明人： Tingfang Ji ,  Aamod Dinkar Khandekar ,  Naga Bhushan ,  Alexei Yurievitch Gorokhov ,  Avneesh Agrawal

IPC分类号： H04W4/00 ,  H04B7/185

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：US08355742B2

公开(公告)日：2013-01-15

申请号：US13495774

申请日：2012-06-13

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

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

IPC分类号： H04B7/00

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：US08842619B2

公开(公告)日：2014-09-23

申请号：US13178357

申请日：2011-07-07

申请人： Aamod Dinkar Khandekar ,  Alexei Yurievitch Gorokhov ,  Avneesh Agrawal ,  Rajiv Vijayan ,  Edward Harrison Teague ,  Fatih Ulupinar

发明人： Aamod Dinkar Khandekar ,  Alexei Yurievitch Gorokhov ,  Avneesh Agrawal ,  Rajiv Vijayan ,  Edward Harrison Teague ,  Fatih Ulupinar

IPC分类号： H04Q7/00 ,  H04L27/26 ,  H04L5/02 ,  H04W48/12

CPC分类号： H04L5/023 ,  H04L27/2602 ,  H04W48/12

摘要： To support mobile stations that are not capable of demodulating the entire bandwidth or that can be made to demodulate less than the entire bandwidth, a system, apparatus and method are provided to schedule users on less than all of the bandwidth. Further, certain users can be scheduled on more of the bandwidth than others.

摘要翻译： 为了支持不能解调整个带宽或者可以使其解调的小于整个带宽的移动站，提供了一种系统，装置和方法，以在小于全部带宽上调度用户。 此外，某些用户可以比其他用户更多地调度带宽。

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：US09801188B2

公开(公告)日：2017-10-24

申请号：US12260849

申请日：2008-10-29

申请人： Aamod Khandekar ,  Avneesh Agrawal ,  Ashwin Sampath ,  Gavin B. Horn ,  Alexei Gorokhov ,  Naga Bhushan ,  Tingfang Ji

发明人： Aamod Khandekar ,  Avneesh Agrawal ,  Ashwin Sampath ,  Gavin B. Horn ,  Alexei Gorokhov ,  Naga Bhushan ,  Tingfang Ji

IPC分类号： H04W4/00 ,  H04W72/08 ,  H04W52/24 ,  H04W72/04 ,  H04W84/04 ,  H04W92/20

CPC分类号： H04W72/082 ,  H04W52/243 ,  H04W72/0426 ,  H04W84/045 ,  H04W92/20 ,  Y02D70/00

摘要： Providing for interference reduction and/or avoidance utilizing backhaul signaling between wireless access points (APs) of a wireless access network (AN) is described herein. By way of example, an interference avoidance request (IAR) can be issued by an AP to reduce signal interference on forward link (FL) and/or downlink (DL) transmissions by neighboring APs. The IAR can be routed via a backhaul network and/or over-the-air via access terminals (ATs) coupled with the AP or one or more interfering APs. Upon receiving the IAR, an interfering AP can determine reduced transmit power levels for FL and/or RL transmissions and respond to the IAR. The response can include reduced power levels and can be sent via the backhaul network or OTA. By employing the backhaul network in full or in part, interference avoidance can be conducted even for semi-planned or unplanned heterogeneous networks coupled by the backhaul.

公开(公告)号：US20100099449A1

公开(公告)日：2010-04-22

申请号：US12425302

申请日：2009-04-16

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

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

IPC分类号： H04B15/00 ,  H04B7/00

CPC分类号： H04W52/243 ,  H04W72/08

摘要： Techniques for managing interference in a wireless network are described. In an aspect, reduce interference requests and interference indicators may be used for interference management to enable operation in scenarios with dominant interferers. In one design, a terminal may receive a reduce interference request from a first base station requesting lower interference on specified time-frequency resources. The terminal may also receive an interference indicator conveying the interference observed by a second base station. The terminal may determine its transmit power based on the reduce interference request and the interference indicator. For example, the terminal may determine an initial transmit power based on the reduce interference request (or the interference indicator) and may adjust the initial transmit power based on the interference indicator (or the reduce interference request) to obtain its transmit power. The terminal may transmit data to a serving base station at the determined transmit power.

摘要翻译： 描述了用于管理无线网络中的干扰的技术。 在一个方面，减少干扰请求和干扰指示符可以用于干扰管理，以使得能够在具有主要干扰源的情况下进行操作。 在一种设计中，终端可以从指定的时间 - 频率资源上请求较低干扰的第一基站接收减少干扰请求。 终端还可以接收传达由第二基站观测到的干扰的干扰指示符。 终端可以基于减少干扰请求和干扰指示符来确定其发射功率。 例如，终端可以基于减少干扰请求（或干扰指示符）来确定初始发射功率，并且可以基于干扰指示符（或减少干扰请求）来调整初始发射功率以获得其发射功率。 终端可以以所确定的发射功率向服务基站发送数据。

公开(公告)号：US20100099428A1

公开(公告)日：2010-04-22

申请号：US12425243

申请日：2009-04-16

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

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

IPC分类号： H04W72/00 ,  H04B15/00

CPC分类号： H04W72/082 ,  H04J11/0059 ,  H04L5/0007 ,  H04L5/0035 ,  H04L5/0048 ,  H04W24/08

摘要： Techniques for transmitting null pilots to support interference estimation in a wireless network are described. A null pilot is non-transmission on designated time-frequency resources by a cell or a cluster of cells supporting cooperative transmission to a UE. The received power of the null pilot from the cell or cluster of cells may be indicative of interference from other cells. In one design, a cell in the cluster may determine resources for sending a null pilot by the cell. The cell may transmit the null pilot (i.e., send no transmissions) on the resources to allow UEs to estimate out-of-cluster interference. Some or all cells in the cluster may transmit null pilots on the same resources. The cell may receive interference and channel information from the UE and may send data transmission to the UE based on the interference and/or channel information. Remaining cells in the cluster may reduce interference to the UE.

摘要翻译： 描述了用于发送空导频以支持无线网络中的干扰估计的技术。 空导频是通过支持向UE的协作传输的小区或小区集群在指定的时间 - 频率资源上进行非传输。 来自小区或小区簇的空导频的接收功率可以指示来自其他小区的干扰。 在一种设计中，集群中的小区可以确定用于由小区发送空导频的资源。 小区可以在资源上发送空导频（即，不发送传输），以允许UE估计簇外干扰。 集群中的一些或所有单元可以在相同的资源上传输空导频。 小区可以从UE接收干扰和信道信息，并且可以基于干扰和/或信道信息向UE发送数据传输。 群集中的剩余小区可以减少对UE的干扰。

公开(公告)号：US08559879B2

公开(公告)日：2013-10-15

申请号：US12425243

申请日：2009-04-16

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

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

IPC分类号： H04B1/00

CPC分类号： H04W72/082 ,  H04J11/0059 ,  H04L5/0007 ,  H04L5/0035 ,  H04L5/0048 ,  H04W24/08

摘要： Techniques for transmitting null pilots to support interference estimation in a wireless network are described. A null pilot is non-transmission on designated time-frequency resources by a cell or a cluster of cells supporting cooperative transmission to a UE. The received power of the null pilot from the cell or cluster of cells may be indicative of interference from other cells. In one design, a cell in the cluster may determine resources for sending a null pilot by the cell. The cell may transmit the null pilot (i.e., send no transmissions) on the resources to allow UEs to estimate out-of-cluster interference. Some or all cells in the cluster may transmit null pilots on the same resources. The cell may receive interference and channel information from the UE and may send data transmission to the UE based on the interference and/or channel information. Remaining cells in the cluster may reduce interference to the UE.

摘要翻译： 描述了用于发送空导频以支持无线网络中的干扰估计的技术。 空导频是通过支持向UE的协作传输的小区或小区集群在指定的时间 - 频率资源上进行非传输。 来自小区或小区簇的空导频的接收功率可以指示来自其他小区的干扰。 在一种设计中，集群中的小区可以确定用于由小区发送空导频的资源。 小区可以在资源上发送空导频（即，不发送传输），以允许UE估计簇外干扰。 集群中的一些或所有单元可以在相同的资源上传输空导频。 小区可以从UE接收干扰和信道信息，并且可以基于干扰和/或信道信息向UE发送数据传输。 群集中的剩余小区可以减少对UE的干扰。

公开(公告)号：US08285321B2

公开(公告)日：2012-10-09

申请号：US12463885

申请日：2009-05-11

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

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

IPC分类号： H04B7/00

CPC分类号： H04W48/20

摘要： Techniques for using virtual noise figure for various functions in a wireless communication network are described. A virtual noise figure is an indication of a virtual noise level at a receiver, which may be higher than an actual noise level at the receiver. In an aspect, virtual noise figure may be used for serving base station selection. A terminal may receive information indicative of a virtual noise figure for each of at least one base station. The terminal may select a serving base station based on the virtual noise figure for each base station. The terminal may send data to the serving base station at a rate selected based on an actual noise figure for the serving base station. In other aspects, virtual noise figure may be used for interference management and/or power control.

摘要翻译： 描述了在无线通信网络中用于各种功能的虚拟噪声系数的技术。 虚拟噪声系数是接收机处的虚拟噪声电平的指示，其可能高于接收机处的实际噪声电平。 在一方面，虚拟噪声系数可用于服务基站选择。 终端可以接收指示至少一个基站中的每一个的虚拟噪声系数的信息。 终端可以基于每个基站的虚拟噪声系数来选择服务基站。 终端可以以服务基站的实际噪声系数选择的速率向服务基站发送数据。 在其他方面，虚拟噪声系数可用于干扰管理和/或功率控制。

公开(公告)号：US20090286563A1

公开(公告)日：2009-11-19

申请号：US12463885

申请日：2009-05-11

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

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

IPC分类号： H04B15/00 ,  H04B7/00

CPC分类号： H04W48/20

摘要： Techniques for using virtual noise figure for various functions in a wireless communication network are described. A virtual noise figure is an indication of a virtual noise level at a receiver, which may be higher than an actual noise level at the receiver. In an aspect, virtual noise figure may be used for serving base station selection. A terminal may receive information indicative of a virtual noise figure for each of at least one base station. The terminal may select a serving base station based on the virtual noise figure for each base station. The terminal may send data to the serving base station at a rate selected based on an actual noise figure for the serving base station. In other aspects, virtual noise figure may be used for interference management and/or power control.

摘要翻译： 描述了在无线通信网络中用于各种功能的虚拟噪声系数的技术。 虚拟噪声系数是接收机处的虚拟噪声电平的指示，其可能高于接收机处的实际噪声电平。 在一方面，虚拟噪声系数可用于服务基站选择。 终端可以接收指示至少一个基站中的每一个的虚拟噪声系数的信息。 终端可以基于每个基站的虚拟噪声系数来选择服务基站。 终端可以以服务基站的实际噪声系数选择的速率向服务基站发送数据。 在其他方面，虚拟噪声系数可用于干扰管理和/或功率控制。