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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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52.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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53.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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公开(公告)号：US20070197254A1
公开(公告)日：2007-08-23
申请号：US11620033
申请日：2007-01-04
申请人： Mohammad Borran , Aamod Khandekar , Avneesh Agrawal , Tingfang Ji
发明人： Mohammad Borran , Aamod Khandekar , Avneesh Agrawal , Tingfang Ji
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：US20060209927A1
公开(公告)日：2006-09-21
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 PN 1 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PN 1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，则终端对于接收到的样本与用于不同时间偏移的PN1序列进行直接相关，并识别最强的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：US20050190868A1
公开(公告)日：2005-09-01
申请号：US10791342
申请日：2004-03-01
申请人： Aamod Khandekar , Avneesh Agrawal , Fuyun Ling
发明人： Aamod Khandekar , Avneesh Agrawal , Fuyun Ling
CPC分类号： H04L1/005 , H04L1/0071 , H04L25/0238 , H04L25/03171
摘要： For an iterative channel and interference estimation and decoding scheme, prior information for channel gain and interference is initially obtained based on received pilot symbols. Forward information for code bits corresponding to received data symbols is derived based on the received data symbols and the prior information and then decoded to obtain feedback information for the code bits corresponding to the received data symbols. A posteriori information for channel gain and interference for each received data symbol is derived based on the feedback information for that received data symbol. The a posteriori information for the received data symbols and the prior information are combined to obtain updated information for channel gain and interference for each received data symbol. The process can be repeated for any number of iterations. The prior, a posteriori, and updated information may be represented by joint probability distributions on channel gain and interference. The forward and feedback information may be represented by log-likelihood ratios.
摘要翻译： 对于迭代信道和干扰估计和解码方案，首先基于接收到的导频符号获得用于信道增益和干扰的先验信息。 基于接收到的数据符号和先验信息导出与接收到的数据符号相对应的码位的转发信息，然后解码以获得与接收的数据符号对应的码位的反馈信息。 基于该接收到的数据符号的反馈信息导出每个接收到的数据符号的信道增益和干扰的后验信息。 组合接收到的数据符号和先验信息的后验信息以获得每个接收到的数据符号的信道增益和干扰的更新信息。 该过程可以重复任意次数的迭代。 先前的，后验的和更新的信息可以由通道增益和干扰的联合概率分布来表示。 正向和反馈信息可以由对数似然比表示。
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公开(公告)号：US20150312895A1
公开(公告)日：2015-10-29
申请号：US14789332
申请日：2015-07-01
申请人： Aamod Khandekar , Juan Montojo , Avneesh Agrawal
发明人： Aamod Khandekar , Juan Montojo , Avneesh Agrawal
IPC分类号： H04W72/04
CPC分类号： H04W72/0406 , H04L5/0073 , H04W16/14 , H04W72/042 , H04W72/044 , H04W88/06 , H04W88/10
摘要： Systems and methodologies are described that facilitate defining new control channels in legacy wireless networks. Control data resources for new systems can be defined over resources reserved for general data communications in the legacy wireless network specification. In this regard, legacy devices can still be supported by devices implementing new control data resources, and the new control data resources can avoid substantial interference that is typically exhibited over legacy control and/or reference signal resources by instead using the general data resources. In addition, new system devices can avoid scheduling data communication resources over the new control resources to create a substantially non-interfered global control segment. Control data can be transmitted over the segment using beacon-based technologies, reuse schemes, and/or the like.
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公开(公告)号：US08842693B2
公开(公告)日：2014-09-23
申请号：US11441742
申请日：2006-05-25
CPC分类号： H04B7/0697 , H04L1/0001 , H04L1/0006 , H04L1/0026 , H04L1/1812 , H04L1/1893
摘要： Systems and methodologies are described that facilitate reducing rank (e.g., of a user device) as a number of transmissions there from increases. Such rank step-down can improve interference resistance and facilitate maintaining code rate despite transmission propagation. Additionally, rank step-down information can be encoded along with CQI information to generate a 5-bit CQI signal that can facilitate updating a user's rank upon each CQI transmission (e.g., approximately every 5 ms). The described systems and/or methods can be employed in a single code word (SCW) wireless communication environment with a hybrid automatic request (HARQ) protocol.
摘要翻译： 描述的系统和方法被简化为有助于减少等级（例如，用户设备），因为其中的传输数量增加。 这种排序降低可以改善抗干扰性，并且有助于保持代码率，尽管传输传播。 此外，等级降级信息可以与CQI信息一起编码，以产生可以有助于在每次CQI传输（例如，大约每5ms）更新用户的等级的5比特CQI信号。 所描述的系统和/或方法可以用于具有混合自动请求（HARQ）协议的单个码字（SCW）无线通信环境中。
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公开(公告)号：US08700082B2
公开(公告)日：2014-04-15
申请号：US11620030
申请日：2007-01-04
IPC分类号： H04W52/04
CPC分类号： H04W52/247 , H04W52/241 , H04W52/243 , H04W52/60 , Y02D70/10
摘要： Systems and methodologies are described that facilitate mitigation of interference in a wireless communication environment. Terminals can utilize interference information provided by neighboring sectors to adjust transmit power and reduce interference. Access points can provide two sets or types of interference information. The first type can be transmitted over a large coverage area, requiring significant overhead and limiting the transmission rate. Access points can also provide a second set or type of interference information directed at smaller coverage area, such as an area proximate to the edge of the supported sector. This second type of interference information can be utilized by terminals that include the access point within their active set. The second set of interference information can be provided at a higher rate than the first set due to decreased overhead requirements. Terminals can utilize both sets of interference information to adjust transmit power.
摘要翻译： 描述了有助于减轻无线通信环境中的干扰的系统和方法。 终端可以利用相邻扇区提供的干扰信息来调整发射功率并减少干扰。 接入点可以提供两组或多种干扰信息。 第一种类型可以在大的覆盖区域上传输，需要大量开销并限制传输速率。 接入点还可以提供针对较小覆盖区域的第二组或干扰类型，例如靠近所支持扇区边缘的区域。 这种第二类型的干扰信息可以由包括其活动集中的接入点的终端利用。 由于降低的开销要求，可以以比第一组更高的速率提供第二组干扰信息。 终端可以利用两组干扰信息来调整发射功率。
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60.发明申请SYSTEMS AND METHODS THAT UTILIZE A CAPACITY-BASED SIGNAL-TO-NOISE RATIO TO PREDICT AND IMPROVE MOBILE COMMUNICATION 审中-公开利用基于能力的信号与噪声比进行预测和改进移动通信的系统和方法公开(公告)号：US20100029265A1
公开(公告)日：2010-02-04
申请号：US12577659
申请日：2009-10-12
IPC分类号： H04W24/00
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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