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公开(公告)号：US08543138B2
公开(公告)日：2013-09-24
申请号：US11175788
申请日：2005-07-05
IPC分类号： H04W68/00
CPC分类号： H04B7/0491 , H04W16/24 , H04W68/10
摘要： Systems and methods are described that facilitate improving paging signal strength at or near sector perimeters in a wireless network region by transmitted identical paging waveforms simultaneously from all sectors in the region and permitting over-the-air signal aggregation to combine signal energy near sector perimeters. Waveforms can be modulated using an orthogonal frequency division multiplexing technique and can be simultaneously transmitted according to predefined transmission resources over a multi-sector broadcast paging channel reserved for such identical waveforms. Cyclic prefix can be added to the identical waveforms to mitigate problems associated with delay spread and/or time-of-arrival differences at or near sector perimeters.
摘要翻译： 描述了系统和方法，其有助于通过从该区域中的所有扇区同时发送的相同寻呼波形来改善无线网络区域中或其附近的寻呼信号强度，并允许空中信号聚合以组合扇区周边附近的信号能量。 可以使用正交频分复用技术来调制波形，并且可以通过为这样相同的波形保留的多扇区广播寻呼信道根据预定义的传输资源同时发送波形。 循环前缀可以添加到相同的波形中，以减轻与扇区边缘处或附近的延迟扩展和/或到达时间差异相关的问题。
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公开(公告)号：US09088384B2
公开(公告)日：2015-07-21
申请号：US11511735
申请日：2006-08-28
IPC分类号： G11B17/04 , H04B7/216 , H04B1/00 , H04B7/02 , H04J13/10 , H04L25/03 , H04B1/713 , H04L5/00 , H04L25/02
CPC分类号： H04J13/102 , H04B1/713 , H04L5/0026 , H04L5/0051 , H04L25/0204 , H04L25/0226 , H04L25/03866
摘要： Pilot symbols transmitted from different sectors of a same base station are multiplied with a same cell specific scrambling code and a first code having low cross correlation and second codes having low cross correlation. The second code is constant over the length of the first code, but may vary for repetitions of the first code.
摘要翻译： 从相同基站的不同扇区发送的导频符号与相同的小区特定扰码和具有低互相关的第一码和具有低互相关的第二码相乘。 第二个代码在第一个代码的长度上是恒定的，但是对于第一个代码的重复可能会有所不同。
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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。
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公开(公告)号：US08611284B2
公开(公告)日：2013-12-17
申请号：US11370639
申请日：2006-03-07
IPC分类号： H04Q1/00
CPC分类号： H04W72/042 , H04L5/0044 , H04L5/0053 , H04L5/0096 , H04W72/0486
摘要： Systems and methodologies are described that facilitate dynamically supplementing or decrementing resource assignments to mobile devices in a wireless network environment without requiring transmission of replacement assignments. Supplemental assignments can be generated based on information related to mobile device need and resource availability. Moreover, resource assignments can be persisted for a mobile device.
摘要翻译： 描述了促进在无线网络环境中动态地补充或递减对移动设备的资源分配的系统和方法，而不需要传输替换分配。 可以根据与移动设备需求和资源可用性相关的信息生成补充分配。 此外，可以为移动设备持续资源分配。
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公开(公告)号：US08027372B2
公开(公告)日：2011-09-27
申请号：US11022482
申请日：2004-12-22
申请人： Aamod Khandekar , Avneesh Agrawal
发明人： Aamod Khandekar , Avneesh Agrawal
IPC分类号： H04B1/00
CPC分类号： H04L5/0048 , H04B1/7077 , H04B2201/70701 , H04B2201/70702 , H04L5/0026 , H04L25/0204 , H04L25/03866 , H04L27/2613 , H04L27/2657 , H04L27/2662 , H04L27/2675
摘要： Each base station transmits a TDM pilot 1 having multiple instances of a pilot-1 sequence generated with a PN1 sequence and a TDM pilot 2 having at least one instance of a pilot-2 sequence generated with a PN2 sequence. Each base station is assigned a specific PN2 sequence that uniquely identifies that base station. A terminal uses TDM pilot 1 to detect for the presence of a signal and uses TDM pilot 2 to identify base stations and obtain accurate timing. For signal detection, the terminal performs delayed correlation on received samples and determines whether a signal is present. If a signal is detected, the terminal performs direct correlation on the received samples with PN1 sequences for K1 different time offsets and identifies K2 strongest TDM pilot 1 instances. For time synchronization, the terminal performs direct correlation on the received samples with PN2 sequences to detect for TDM pilot 2.
摘要翻译： 每个基站发送具有由PN1序列生成的导频1序列的多个实例的TDM导频1和具有由PN2序列生成的导频-2序列的至少一个实例的TDM导频2。 为每个基站分配唯一标识该基站的特定PN2序列。 终端使用TDM导频1检测信号的存在，并使用TDM导频2识别基站并获得准确的定时。 对于信号检测，终端在接收到的采样上执行延迟相关，并确定信号是否存在。 如果检测到信号，则终端对具有用于K1不同时间偏移的PN1序列的接收样本执行直接相关，并且识别K2个最强的TDM导频1实例。 对于时间同步，终端对PN2序列的接收样本执行直接相关，以检测TDM导频2。
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公开(公告)号：US07966033B2
公开(公告)日：2011-06-21
申请号：US11620033
申请日：2007-01-04
IPC分类号： H04B7/00
CPC分类号： H04W52/247 , H04W52/146 , H04W52/241 , H04W52/243 , H04W52/246 , H04W52/36 , H04W52/54
摘要： Systems and methodologies are described that facilitate serving sector directed transmit power control in a wireless communication environment. Under certain conditions, an access point can have better data with which to determine appropriate power levels than an individual terminal. Accordingly, an access point can transmit power control information to one or more terminals supported by the access point overriding normal power determination procedures. In particular, power control information can be included within an assignment message that designates resources (e.g., frequency, time) assigned to a terminal. Power control information can be based upon SNR, quality of service requirements, interference information, any other relevant information or any combination thereof.
摘要翻译： 描述了在无线通信环境中促进服务于扇区定向发射功率控制的系统和方法。 在某些条件下，接入点可以具有比单个终端确定适当功率级别的更好的数据。 因此，接入点可以将功率控制信息发送到由接入点支持的一个或多个终端覆盖正常功率确定过程。 特别地，功率控制信息可以被包括在指定分配给终端的资源（例如，频率，时间）的分配消息内。 功率控制信息可以基于SNR，服务质量要求，干扰信息，任何其他相关信息或其任何组合。
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公开(公告)号：US20100046447A1
公开(公告)日：2010-02-25
申请号：US12446689
申请日：2007-10-26
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。
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8.发明授权Systems and methods that utilize a capacity-based signal-to-noise ratio to predict and improve mobile communication 失效利用基于容量的信噪比来预测和改进移动通信的系统和方法公开(公告)号：US07623490B2
公开(公告)日：2009-11-24
申请号：US11021697
申请日：2004-12-22
IPC分类号： H04W4/00
CPC分类号： H04W52/241 , H04L1/0001 , H04L1/0002 , H04L1/0009 , H04L1/0026 , H04L1/0028 , H04L1/0066 , H04L1/20 , H04L1/206 , H04W52/24
摘要： Techniques for utilizing a capacity-based effective signal-to-noise ratio (SNR) to improve wireless communication are described herein. In an embodiment, a mobile terminal can determine the effective SNR from a forward link channel using pilot/data symbols. The mobile terminal can convey the effective SNR to a base station. In order to minimize transmission overhead, the mobile terminal can quantize the effective SNR prior to transmitting it to the base station. In another embodiment, the base station can determine the effective SNR from a reverse link. The base station can utilize the effective SNR to facilitate scheduling transmissions from the mobile terminal, transmitting power control commands to the mobile terminal, and determining a supporting data rate for the mobile terminal, for example. Suitable SNRs include constrained, unconstrained, average, and/or approximated effective SNRs. In addition, various filters, such as an averaging filter, can be utilized to further process the effective SNR.
摘要翻译： 这里描述了利用基于容量的有效信噪比（SNR）来改善无线通信的技术。 在一个实施例中，移动终端可以使用导频/数据符号从前向链路信道确定有效SNR。 移动终端可以将有效SNR传送给基站。 为了最小化传输开销，移动终端可以在将其发送到基站之前量化有效SNR。 在另一个实施例中，基站可以从反向链路确定有效SNR。 基站可以利用有效SNR来促进调度来自移动终端的传输，向移动终端发送功率控制命令，以及确定移动终端的支持数据速率。 合适的SNR包括约束的，无约束的，平均的和/或近似的有效SNR。 此外，可以使用诸如平均滤波器的各种滤波器来进一步处理有效SNR。
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9.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
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。
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10.发明申请METHOD AND APPARATUS FOR USING LOAD INDICATION FOR INTEREFERENCE MITIGATION IN A WIRELESS COMMUNICATION SYSTEM 审中-公开在无线通信系统中使用负载指示进行干扰减轻的方法和装置公开(公告)号：US20090227263A1
公开(公告)日：2009-09-10
申请号：US12206603
申请日：2008-09-08
申请人： Avneesh Agrawal , Tingfang Ji , Aamod Khandekar
发明人： Avneesh Agrawal , Tingfang Ji , Aamod Khandekar
CPC分类号： H04W52/343 , H04W16/16 , H04W48/08 , H04W52/247 , H04W84/045 , H04W88/04
摘要： Techniques for mitigating interference in a wireless communication system are described. In an aspect, a base station may periodically broadcast a load indication to convey information such as whether or not to use interference mitigation, which interference mitigation scheme to use, resources to apply interference mitigation, duration of interference mitigation, etc. Terminals may receive the load indication and perform interference mitigation as indicated by the load indication. In one design, a terminal may receive a load indication from a base station that the terminal desires to access. The terminal may determine whether to obtain reserved resources having reduced interference based on the load indication. In another design, a terminal may receive a load indication from a neighbor base station. The terminal may determine whether to reduce its transmit power or to request for resources prior to transmission based on the load indication.
摘要翻译： 描述了用于减轻无线通信系统中的干扰的技术。 在一方面，基站可以周期性地广播负载指示以传达诸如是否使用干扰减轻，使用哪种干扰减轻方案，应用干扰减轻的资源，干扰减轻的持续时间等信息的信息。终端可以接收 负载指示并执行负载指示所示的干扰减轻。 在一种设计中，终端可以从基站接收终端希望访问的负载指示。 终端可以基于负载指示来确定是否获得具有减少的干扰的预留资源。 在另一种设计中，终端可以从相邻基站接收负载指示。 终端可以基于负载指示来确定是否减少其发送功率或者在发送之前请求资源。
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