公开(公告)号：US09923597B2

公开(公告)日：2018-03-20

申请号：US14991874

申请日：2016-01-08

Applicant: QUALCOMM Incorporated

Inventor： Alexei Y. Gorokhov ,  Avneesh Agrawal

IPC: H04B1/7103

Abstract: Techniques for mitigating interference in a wireless communication system are described. In an aspect, pertinent transmission parameters for a served UE may be sent to at least one interfered UE to support interference mitigation. In one design, information for at least one transmission parameter for a data transmission sent by a first cell to a first UE may be transmitted to at least one UE served by a second cell to enable the at least one UE to perform interference mitigation for the data transmission sent by the first cell to the first UE. The information may be transmitted by either the first cell or the second cell. In another aspect, a cell may send transmission parameters for a UE via a pilot. In yet another aspect, scrambling may be performed by a cell at symbol level to enable an interfered UE to distinguish between modulation symbols of desired and interfering transmissions.

公开(公告)号：US09635659B2

公开(公告)日：2017-04-25

申请号：US14023300

申请日：2013-09-10

Applicant: QUALCOMM Incorporated

Inventor： Peter Gaal ,  Mariam Motamed ,  Wanshi Chen ,  Alexei Y. Gorokhov ,  Dominique F. Bressanelli ,  Levent Aydin

IPC: H04W72/04 ,  H04L5/00 ,  H04L1/18

CPC classification number: H04W72/042 ,  H04L1/0046 ,  H04L1/0061 ,  H04L1/0072 ,  H04L1/1867 ,  H04L5/0053 ,  H04L5/14 ,  H04W72/0446 ,  H04W72/10

Abstract: A method, an apparatus, and a computer program product for wireless communication are provided. The apparatus determines a first decoding candidate in a first search space and a second decoding candidate in a second search space, where the first decoding candidate and the second decoding candidate have a same size but different definitions of information fields, identifies a difference in the information fields, and determines one of the first decoding candidate and the second decoding candidate as a valid candidate based on the identified difference. The apparatus further generates first control information for transmitting in a first search space, codes the first control information, wherein the code applied to the first control information is specific to the first search space and different from code applied to second control information in a second search space, and transmits the coded first control information in the first search space.

公开(公告)号：US20160270017A1

公开(公告)日：2016-09-15

申请号：US15164723

申请日：2016-05-25

Applicant: QUALCOMM Incorporated

Inventor： Ravi Palanki ,  Alexei Y. Gorokhov

IPC: H04W56/00 ,  H04W74/04 ,  H04W72/04

CPC classification number: H04W56/0015 ,  H04W72/0413 ,  H04W74/04

Abstract: A method, an apparatus, and a computer program product for wireless communication are provided in which signals are received from a first base station and a second base station, and a measurement is made of synchronization parameters between the first and second base stations at a user equipment. A signal is transmitted from the user equipment to at least one of the first or second base stations with information about the synchronization parameters. The synchronization parameters generally inform the first and/or second base stations of an adjustment to make to subsequent signals to align reception of the subsequent signals in at least one of time or frequency domains. The user equipment receives a third signal from the first base station and a fourth signal from the second base station, the third and fourth signals being substantially aligned in at least one of the time or frequency domains.

Abstract translation: 提供了一种用于无线通信的方法，装置和计算机程序产品，其中从第一基站和第二基站接收信号，并且测量用户在第一和第二基站之间的同步参数 设备。 使用关于同步参数的信息从用户设备向至少一个第一基站发送信号。 同步参数通常通知第一基站和/或第二基站进行调整以对随后的信号进行调整，以使后续信号在时域或频域中的至少一个中的接收。 用户设备接收来自第一基站的第三信号和来自第二基站的第四信号，第三和第四信号基本上对准时域或频域中的至少一个。

公开(公告)号：US09485068B2

公开(公告)日：2016-11-01

申请号：US14533404

申请日：2014-11-05

Applicant: QUALCOMM Incorporated

Inventor： Tingfang Ji ,  Avneesh Agrawal ,  Alexei Y. Gorokhov

IPC: H04L5/00 ,  H04L1/00 ,  H04W52/24 ,  H04W52/32 ,  H04W52/34 ,  H04L1/18 ,  H04L25/02

CPC classification number: H04L5/0048 ,  H04L1/0004 ,  H04L1/001 ,  H04L1/0026 ,  H04L1/1812 ,  H04L5/0044 ,  H04L5/005 ,  H04L5/0053 ,  H04L5/0057 ,  H04L5/006 ,  H04L5/0062 ,  H04L25/0224 ,  H04W52/241 ,  H04W52/243 ,  H04W52/325 ,  H04W52/343

Abstract: Techniques for mitigating pilot pollution in a wireless network are described. In an aspect, pilot pollution may be mitigated by reducing density and/or transmit power of common pilots whenever possible. A cell may send a common pilot at a first density and a first transmit power level during a first time period and may send the common pilot at a second density and a second transmit power level during a second time period. The second density may be lower than the first density and/or the second transmit power level may be lower than the first transmit power level. Lower density may be achieved by sending the common pilot less frequently, on fewer subcarriers, and/or from fewer antennas. The cell may determine whether to reduce the density and/or transmit power of the common pilot based on network loading, SINRs of terminals, etc. In another aspect, pilot pollution may be mitigated by performing pilot cancellation at a terminal.

Abstract translation: 描述了减轻无线网络中导频污染的技术。 在一方面，可能通过尽可能减少公共飞行员的密度和/或发射功率来减轻飞行员污染。 小区可以在第一时间段期间以第一密度和第一发射功率电平发送公共导频，并且可以在第二时间段期间以第二密度和第二发射功率电平发送公共导频。 第二密度可以低于第一密度，和/或第二发射功率电平可能低于第一发射功率电平。 较低的密度可以通过在较少的子载波上和/或从更少的天线较少频率地发送公共导频来实现。 小区可以基于网络负载，终端的SINR等来确定是否降低公共导频的密度和/或发射功率。另一方面，可以通过在终端执行导频消除来减轻导频污染。

公开(公告)号：US20130294275A1

公开(公告)日：2013-11-07

申请号：US13937736

申请日：2013-07-09

Applicant: QUALCOMM Incorporated

Inventor： Alexei Y. Gorokhov ,  Siddhartha Mallik ,  Naga Bhushan ,  Alan Barbieri

IPC: H04W24/02

CPC classification number: H04W24/02 ,  H04B7/024 ,  H04B17/382

Abstract: Systems and methodologies are described that facilitate dynamically forming clusters in a wireless communication environment. A set of non-overlapping clusters can be formed dynamically over time and in a distributed manner. Each of the clusters can include a set of base stations and a set of mobile devices. The clusters can be yielded based upon a set of local strategies selected by base stations across the network converged upon through message passing. For example, each base station can select a particular local strategy as a function of time based upon network-wide utility estimates respectively conditioned upon implementation of the particular local strategy and disparate possible local strategies that can cover the corresponding base station. Moreover, operation within each of the clusters can be coordinated.

Abstract translation: 描述了促进在无线通信环境中动态形成集群的系统和方法。 一组不重叠的簇可以随着时间和分布式动态地形成。 每个群集可以包括一组基站和一组移动设备。 可以基于通过基站通过消息传递收敛的网络选择的一组局部策略来产生群集。 例如，基于分别基于特定局部策略的实施和可覆盖相应基站的不同的可能的局部策略的网络范围的效用估计，每个基站可以选择作为时间的函数的特定局部策略。 此外，可以协调每个群集内的操作。

公开(公告)号：US20130229935A1

公开(公告)日：2013-09-05

申请号：US13864860

申请日：2013-04-17

Applicant: QUALCOMM INCORPORATED

Inventor： Alexei Y. Gorokhov ,  Siddhartha Mallik ,  Alan Barbieri ,  Jilei Hou

IPC: H04W24/02

CPC classification number: H04W24/02 ,  H04L5/0023 ,  H04L5/0035 ,  H04L5/006 ,  H04L5/0073 ,  H04L5/0091

Abstract: Systems and methodologies are described that facilitate cooperation strategy selection for a network multiple-in-multiple-out (N-MIMO) communication system. As described herein, one or more nodes in a communication system capable of N-MIMO communication can calculate marginal utilities, projected per-user rates, and/or other parameters corresponding to respective associated users. Based on these calculations, respective network nodes can perform user scheduling and selection, cell scheduling and selection, selection of a cooperation strategy (e.g., coordinated silencing, joint transmission, coordinated beamforming, etc.), and/or other operations to provide cooperative communication for respective users. As further described herein, projected rate calculation for a given user can be adjusted based on processing or channel implementation loss associated with the user, interference nulling capability of the user, or other factors. As additionally described herein, these and/or other parameters can be fed back by respective users to a serving network node and/or mandated via system performance requirements.

Abstract translation: 描述了促进网络多输入多输出（N-MIMO）通信系统的协作策略选择的系统和方法。 如这里所描述的，能够进行N-MIMO通信的通信系统中的一个或多个节点可以计算边际效用，预计的每用户速率和/或对应于各个相关用户的其他参数。 基于这些计算，各个网络节点可以执行用户调度和选择，小区调度和选择，合作策略的选择（例如，协调消隐，联合传输，协调波束形成等）和/或提供协作通信的其他操作 为各个用户。 如本文进一步描述的，可以基于与用户相关联的处理或信道实现损失，用户的干扰归零能力或其他因素来调整给定用户的预计速率计算。 如本文另外描述的，这些和/或其他参数可以由相应的用户反馈到服务网络节点和/或通过系统性能要求强制。

公开(公告)号：US10027372B2

公开(公告)日：2018-07-17

申请号：US14991874

申请日：2016-01-08

Applicant: QUALCOMM Incorporated

Inventor： Alexei Y. Gorokhov ,  Avneesh Agrawal

IPC: H04B1/7103

CPC classification number: H04B1/7103 ,  H04B2201/70702

Abstract: Techniques for mitigating interference in a wireless communication system are described. In an aspect, pertinent transmission parameters for a served UE may be sent to at least one interfered UE to support interference mitigation. In one design, information for at least one transmission parameter for a data transmission sent by a first cell to a first UE may be transmitted to at least one UE served by a second cell to enable the at least one UE to perform interference mitigation for the data transmission sent by the first cell to the first UE. The information may be transmitted by either the first cell or the second cell. In another aspect, a cell may send transmission parameters for a UE via a pilot. In yet another aspect, scrambling may be performed by a cell at symbol level to enable an interfered UE to distinguish between modulation symbols of desired and interfering transmissions.

公开(公告)号：US09854590B2

公开(公告)日：2017-12-26

申请号：US14313780

申请日：2014-06-24

Applicant: QUALCOMM Incorporated

Inventor： Ravi Palanki ,  Alexei Y. Gorokhov

IPC: H04W4/00 ,  H04W72/08 ,  H04L5/00 ,  H04L27/26 ,  H04W52/24 ,  H04W24/02

CPC classification number: H04W72/082 ,  H04L5/0007 ,  H04L5/003 ,  H04L5/0073 ,  H04L27/2601 ,  H04W24/02 ,  H04W52/244

Abstract: Techniques for communicating on multiple carriers in a wireless communication network are described. In an aspect, different transmit power levels may be used for different carriers to mitigate interference. A first base station may be assigned one or more carriers among multiple carriers available for communication. A second base station may be assigned one or more carriers not assigned to the first base station. Each base station may communicate on each assigned carrier at a first (e.g., full) transmit power level and may communicate on each unassigned carrier at a second (e.g., lower) transmit power level lower. The first and second base stations may belong in different power classes or support different association types. In another aspect, control information may be sent on a designated carrier to support communication on multiple carriers. In yet another aspect, a base station may broadcast bar information indicating the status of carriers.

公开(公告)号：US09485661B2

公开(公告)日：2016-11-01

申请号：US13750783

申请日：2013-01-25

Applicant: QUALCOMM Incorporated

Inventor： Alexei Y. Gorokhov

IPC: H04B7/02 ,  H04B7/04 ,  H04B7/06 ,  H04W16/02 ,  B25B23/00 ,  B25G1/10

CPC classification number: H04W16/02 ,  B25B23/0021 ,  B25G1/102 ,  H04B7/024 ,  H04B7/0417 ,  H04B7/0478 ,  H04B7/0626

Abstract: Systems and methodologies are described herein that facilitate the generation and use of separable, hierarchical channel state feedback in a wireless communication system. As described herein, in the event that multiple network nodes cooperate to conduct downlink transmissions to a network user, channel state feedback as reported by the network user can be separated into intra-node feedback relating to per-node channel conditions and inter-node feedback relating to relative phase and/or amplitude between channels corresponding to respective nodes. Further, a network user can select to report intra-node feedback and/or inter-node feedback based on network instructions, a cooperation strategy to be utilized by respective network nodes, or the like. As additionally described herein, respective codebooks on which inter-node and intra-node channel feedback is based can be configured to convey information relating to a partial channel description and/or to vary based on resource units (e.g., sub-bands, resource blocks, etc.) utilized for downlink communication.

公开(公告)号：US09426670B2

公开(公告)日：2016-08-23

申请号：US13847709

申请日：2013-03-20

Applicant: QUALCOMM Incorporated

Inventor： Ravi Palanki ,  Alexei Y. Gorokhov ,  Naga Bhushan

IPC: H04B17/00 ,  H04W24/00 ,  H04L1/02 ,  H04W72/08 ,  H04J11/00 ,  H04B17/24 ,  H04B17/345 ,  H04L1/00 ,  H04L5/00 ,  H04W72/04

CPC classification number: H04W24/00 ,  H04B17/24 ,  H04B17/345 ,  H04J11/0053 ,  H04L1/0026 ,  H04L1/0028 ,  H04L1/02 ,  H04L5/0023 ,  H04L5/0035 ,  H04L2001/0092 ,  H04W72/0426 ,  H04W72/085 ,  Y02D70/1222 ,  Y02D70/1242 ,  Y02D70/1262 ,  Y02D70/142 ,  Y02D70/146

Abstract: Systems and methodologies are described herein that facilitate interference measurement and reporting in a network multiple-in-multiple-out (N-MIMO) communication system. As described herein, a network device can measure and report interference corresponding to network nodes outside a designated set of nodes that can cooperatively serve the device. Respective interference reports can additionally identify dominant interfering nodes, correlation between transmit antennas of respective nodes, or the like. Subsequently, respective interference reports can be combined with per-node channel information to manage coordination and scheduling across respective network nodes. As further described herein, interference from a network node can be measured by observing reference and/or synchronization signals from the network node. To aid such observation, respective non-interfering network nodes can define null pilot intervals in which transmission is silenced or otherwise reduced. As additionally described herein, loading information broadcasted by respective interfering network nodes can be identified and utilized in connection with interference calculation.