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    Serving cell selection in wireless communications
    1.
    发明授权
    Serving cell selection in wireless communications 有权
    在无线通信中服务小区选择

    公开(公告)号：US08638759B2

    公开(公告)日：2014-01-28

    申请号：US12362289

    申请日：2009-01-29

    申请人： Tingfang Ji ,  Avneesh Agrawal ,  Aamod Khandekar ,  Alexei Gorokhov

    发明人： Tingfang Ji ,  Avneesh Agrawal ,  Aamod Khandekar ,  Alexei Gorokhov

    IPC分类号： H04W52/22

    CPC分类号： H04W36/0083 ,  H04W36/20 ,  H04W36/22 ,  H04W36/30 ,  H04W36/36 ,  H04W48/20 ,  H04W84/045 ,  Y02D70/1222 ,  Y02D70/1242 ,  Y02D70/1262 ,  Y02D70/142 ,  Y02D70/146

    摘要： Systems and methodologies are described that facilitate selecting and/or reselecting one or more access points, related cells, or carriers based at least in part on calculating an energy efficiency related to the access points. In particular, the energy efficiency can be based at least in part on an estimated pathloss and/or a level of interference related to communicating with the access points. Moreover, load parameters related to the access point can be received and evaluated in selecting and/or reselecting the access point. Thus, access points can be selected or reselected based on parameters other than forward link transmit power. In addition, pathloss and/or interference levels can be weighed based on access point type to prevent macrocell overloading.

    摘要翻译： 描述了至少部分地基于计算与接入点相关的能量效率来促进选择和/或重新选择一个或多个接入点，相关小区或载波的系统和方法。 特别地，能量效率可以至少部分地基于与与接入点通信相关的估计路径损耗和/或干扰水平。 此外，可以在选择和/或重新选择接入点时接收和评估与接入点相关的负载参数。 因此，可以基于除了前向链路发送功率之外的参数来选择或重新选择接入点。 此外，可以基于接入点类型来称量路径损耗和/或干扰电平，以防止宏单元过载。

    BEACON SYMBOL ORTHOGONALIZATION
    3.
    发明申请
    BEACON SYMBOL ORTHOGONALIZATION 有权
    BEACON符号正交定性

    公开(公告)号：US20100046447A1

    公开(公告)日：2010-02-25

    申请号：US12446689

    申请日：2007-10-26

    申请人： Ravi Palanki ,  Alexei Gorokhov ,  Aamod Khandekar ,  Avneesh Agrawal

    发明人： Ravi Palanki ,  Alexei Gorokhov ,  Aamod Khandekar ,  Avneesh Agrawal

    IPC分类号： H04W72/04

    CPC分类号： H04L27/261 ,  H04W28/00 ,  H04W72/04

    摘要： Beacon symbols are sent periodically from the base stations in an OFDM system. The entire power of the base station, or a large portion of it is concentrated in these symbols, thus they are very easily recognized by the mobile stations. The frequencies upon which these symbols are transmitted and the time at which they are transmitted communicates information such as the base station/sector identity and the preferred carrier of the given base station/sector to the mobile station. In order to avoid collision between the beacon symbols of different base stations and sectors, the beacon symbols from different base stations/sectors are transmitted at different symbols times and on different subcarriers.

    摘要翻译： 信标符号在OFDM系统中从基站周期性地发送。 基站的整个功率或其大部分集中在这些符号中，因此它们被移动台非常容易地识别。 发送这些符号的频率和它们被发送的时间将诸如基站/扇区标识和给定基站/扇区的优选载波的信息传送给移动站。 为了避免不同基站和扇区的信标符号之间的冲突，来自不同基站/扇区的信标符号在不同的符号时间和不同子载波上发送。

    Frequency domain filtering to improve channel estimation in multicarrier systems
    4.
    发明授权
    Frequency domain filtering to improve channel estimation in multicarrier systems 失效
    频域滤波以改善多载波系统中的信道估计

    公开(公告)号：US07616711B2

    公开(公告)日：2009-11-10

    申请号：US11022360

    申请日：2004-12-22

    申请人： Dhananjay Ashok Gore ,  Avneesh Agrawal ,  Aamod Khandekar ,  Alexei Gorokhov

    发明人： Dhananjay Ashok Gore ,  Avneesh Agrawal ,  Aamod Khandekar ,  Alexei Gorokhov

    IPC分类号： H03D1/00 ,  H04L27/06

    CPC分类号： H04L27/2647 ,  H04L5/0007 ,  H04L5/0048 ,  H04L5/006 ,  H04L25/022 ,  H04L25/0226 ,  H04L25/023

    摘要： A channel estimation system comprises a filtering component that selectively scales a plurality of carriers as a function of location of the plurality of carriers within a frequency band, wherein the plurality of carriers comprises at least one data carrier and at least one pilot carrier. A component thereafter extrapolates an observation from the at least one pilot carrier, wherein a channel is estimated as a function of the extrapolated observation. The scaling of the carriers facilitates reducing a flooring effect associated with channel estimation. The filtering component can be employed at a transmitter and/or at a receiver, and can be activated and/or deactivated as a function of a sensed data packet type.

    摘要翻译： 信道估计系统包括：滤波部件，其选择性地按照频带内的多个载波的位置来缩放多个载波，其中所述多个载波包括至少一个数据载波和至少一个导频载波。 然后，组件从至少一个导频载波外推观测，其中，估计信道作为外推观测的函数。 载波的缩放有助于减少与信道估计相关的地板效应。 滤波组件可以在发射机和/或接收机处采用，并且可以作为感测数据分组类型的功能被激活和/或去激活。

    POWER DECISION PILOT FOR A WIRELESS COMMUNICATION SYSTEM
    5.
    发明申请
    POWER DECISION PILOT FOR A WIRELESS COMMUNICATION SYSTEM 有权
    无线通信系统的功率决策引导

    公开(公告)号：US20090197629A1

    公开(公告)日：2009-08-06

    申请号：US12262022

    申请日：2008-10-30

    申请人： Mohammad J. Borran ,  Aamod Khandekar ,  Naga Bhushan ,  Ashwin Sampath ,  Alexei Gorokhov ,  Avneesh Agrawal ,  Ravi Palanki ,  Gavin B. Horn

    发明人： Mohammad J. Borran ,  Aamod Khandekar ,  Naga Bhushan ,  Ashwin Sampath ,  Alexei Gorokhov ,  Avneesh Agrawal ,  Ravi Palanki ,  Gavin B. Horn

    IPC分类号： H04B7/00

    CPC分类号： H04W72/048 ,  H04W52/242 ,  H04W52/243 ,  H04W52/28 ,  H04W52/325 ,  H04W52/34

    摘要： Techniques for transmitting data with short-term interference mitigation in a wireless communication system are described. In one design, a first station (e.g., a base station or a terminal) may receive a message sent by a second station to request reduction of interference on at least one resource. In response to receiving the message, the first station may determine a first transmit power level to use for the at least one resource based on one or more factors such as a priority metric sent in the message, the buffer size at the first station, etc. The first station may send a power decision pilot on the at least one resource at a second transmit power level determined based on the first transmit power level.

    摘要翻译： 描述了在无线通信系统中发送具有短期干扰抑制的数据的技术。 在一种设计中，第一站（例如，基站或终端）可以接收由第二站发送的消息以请求减少对至少一个资源的干扰。 响应于接收到消息，第一站可以基于一个或多个因素来确定用于至少一个资源的第一发射功率电平，诸如消息中发送的优先级度量，第一站的缓冲器大小等 第一站可以基于第一发射功率电平确定的第二发射功率电平在所述至少一个资源上发送功率决定导频。

    BACKHAUL SIGNALING FOR INTERFERENCE AVOIDANCE
    6.
    发明申请
    BACKHAUL SIGNALING FOR INTERFERENCE AVOIDANCE 有权
    用于干扰避免的反向信号

    公开(公告)号：US20090197588A1

    公开(公告)日：2009-08-06

    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 ,  H04B1/00

    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.

    摘要翻译： 本文描述了在无线接入网络（AN）的无线接入点（AP）之间利用回程信令来提供减少干扰和/或避免的干扰。 作为示例，AP可以发出干扰避免请求（IAR），以减少相邻AP在前向链路（FL）和/或下行链路（DL）传输上的信号干扰。 IAR可以经由回程网络和/或通过与AP或一个或多个干扰AP耦合的接入终端（AT）进行路由。 在接收到IAR时，干扰AP可以确定用于FL和/或RL传输的降低的发射功率电平并响应于IAR。 响应可以包括降低的功率级别，并且可以通过回程网络或OTA发送。 通过全面或部分采用回程网络，即使对于通过回程耦合的半计划或计划外异构网络，也可以进行干扰回避。

    ACKNOWLEDGEMENT OF CONTROL MESSAGES IN A WIRELESS COMMUNICATION SYSTEM
    7.
    发明申请
    ACKNOWLEDGEMENT OF CONTROL MESSAGES IN A WIRELESS COMMUNICATION SYSTEM 有权
    无线通信系统中控制消息的确认

    公开(公告)号：US20080151829A1

    公开(公告)日：2008-06-26

    申请号：US11943551

    申请日：2007-11-20

    申请人： Aamod Khandekar ,  Alexei Gorokhov ,  Avneesh Agrawal ,  Sundeep Rangan ,  Arnab Das

    发明人： Aamod Khandekar ,  Alexei Gorokhov ,  Avneesh Agrawal ,  Sundeep Rangan ,  Arnab Das

    IPC分类号： H04Q7/00

    CPC分类号： H04L1/1607 ,  H04L5/0007 ,  H04L5/0023 ,  H04L5/0053 ,  H04W72/0413 ,  H04W72/042

    摘要： Techniques for sending control messages are described. In an aspect, assignment messages may be acknowledged based on either linked or dedicated acknowledgement (ACK) resources. A terminal may receive an assignment message from a base station, determine whether to acknowledge the assignment message, and determine ACK resources to use to acknowledge the assignment message. The ACK resources may be linked to a control block on which the assignment message was received, linked to resources given by the assignment message, or assigned to the terminal. The terminal may send the acknowledgement on the ACK resources. In another aspect, a control message may be acknowledged based on ACK resources determined based on the control message or the control block. The ACK resources may be linked to resources assigned by the control message or linked to the control message. The terminal may send an acknowledgement for the control message on the ACK resources.

    摘要翻译： 描述用于发送控制消息的技术。 在一方面，可以基于链接或专用确认（ACK）资源来确认分配消息。 终端可以从基站接收分配消息，确定是否确认分配消息，并确定用于确认分配消息的ACK资源。 ACK资源可以链接到其上接收到分配消息的控制块，链接到由分配消息给出的资源或分配给终端。 终端可以在ACK资源上发送确认。 在另一方面，可以基于基于控制消息或控制块确定的ACK资源来确认控制消息。 ACK资源可以链接到由控制消息分配或链接到控制消息的资源。 终端可以在ACK资源上发送关于控制消息的确认。

    Beacon-based control channels
    9.
    发明授权
    Beacon-based control channels 有权
    基于信标的控制通道

    公开(公告)号：US08798665B2

    公开(公告)日：2014-08-05

    申请号：US12163812

    申请日：2008-06-27

    申请人： Ravi Palanki ,  Avneesh Agrawal ,  Alexei Gorokhov ,  Aamod Khandekar ,  Ashwin Sampath ,  Dexu Lin

    发明人： Ravi Palanki ,  Avneesh Agrawal ,  Alexei Gorokhov ,  Aamod Khandekar ,  Ashwin Sampath ,  Dexu Lin

    IPC分类号： H04W48/12

    CPC分类号： H04L5/0053 ,  H04L1/0056 ,  H04L1/0072 ,  H04L5/0096 ,  H04L27/10 ,  H04W4/20

    摘要： Systems and methodologies are described that facilitate transmitting control information in wireless networks. Portions of bandwidth can be blanked for transmitting control information, and the control information transmitters can utilize beacon symbols to convey the control information. In this regard, interference is mitigated with respect to data transmissions over the control information bandwidth. Selected frequencies of the beacon symbols in a codeword can be used to indicate the control information. The codewords can be encoded with an error control code to provide redundancy for decoding in the presence of some interference.

    摘要翻译： 描述了有助于在无线网络中发送控制信息的系统和方法。 可以将部分带宽消隐以发送控制信息，并且控制信息发射机可以利用信标符号来传达控制信息。 在这方面，相对于控制信息带宽上的数据传输，减轻了干扰。 可以使用码字中的信标符号的选定频率来指示控制信息。 可以用错误控制码对码字进行编码，以在存在一些干扰的情况下提供用于解码的冗余。