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公开(公告)号：US20060014499A1
公开(公告)日：2006-01-19
申请号：US11155204
申请日：2005-06-16
申请人： Alexei Gorokhov , Avneesh Agrawal , Dhananjay Gore , Tamer Kadous
发明人： Alexei Gorokhov , Avneesh Agrawal , Dhananjay Gore , Tamer Kadous
CPC分类号： H04L1/005 , H04L1/0003 , H04L1/0041 , H04L1/06
摘要： A MIMO communication system is adapted to encode multiple data streams at the same adaptable rate. Accordingly, the set of all possible modulation/rate combinations to all modulations with common rates is decreased thus resulting in the reduction of the number of possible packet formats carrying the data streams. Rate prediction is made more error-resilient, in part, due to the averaging over all information rates. Furthermore, the signaling overhead of the packets is reduced. Therefore, the tradeoff between the desired transmission rate granularity on the one hand, and robustness/signaling overhead on the other hand, is controlled by adjusting the coding rate.
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公开(公告)号：US08693405B2
公开(公告)日：2014-04-08
申请号：US11261837
申请日：2005-10-27
IPC分类号： H04B7/00
CPC分类号： H04W72/06 , H04B1/713 , H04B7/026 , H04L5/0023 , H04L5/0037 , H04L5/0044 , H04L5/023
摘要： A method for allocating resources in a wireless communications environment comprises receiving a mapping between a first hop-port and frequency range, and determining whether to map a second access terminal to a second hop-port that is mapped to at least the same frequency range during a substantially similar instance in time, the determination made as a function of characteristics relating to a first access terminal associated with the first hop-port. The method can further include determining that the first access terminal is a candidate for employing Space-Division Multiple Access (SDMA), and mapping the second-hop port and associating the second access terminal with the second hop-port when the second access terminal is also a candidate for employing SDMA.
摘要翻译： 一种用于在无线通信环境中分配资源的方法包括：接收第一跳跃端口和频率范围之间的映射，以及确定是否将第二接入终端映射到映射到至少相同频率范围的第二跳频端口 基本相似的时间实例，根据与与第一跳跃端口相关联的第一接入终端的特性的函数进行确定。 该方法还可以包括确定第一接入终端是采用空分多址（SDMA）的候选者，并且当第二接入终端是第二接入终端时，映射第二跳接口并将第二接入终端与第二跳接口相关联 也是采用SDMA的候选人。
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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：US20120252468A1
公开(公告)日：2012-10-04
申请号：US13495774
申请日：2012-06-13
申请人： Alexei Gorokhov , Avneesh Agrawal , Naga Bhushan , Tinfang Ji
发明人： Alexei Gorokhov , Avneesh Agrawal , Naga Bhushan , Tinfang Ji
IPC分类号： H04W16/02
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。
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公开(公告)号：US08219030B2
公开(公告)日：2012-07-10
申请号：US12142480
申请日：2008-06-19
申请人： Alexei Gorokhov , Avneesh Agrawal , Naga Bhushan , Tingfang Ji
发明人： Alexei Gorokhov , Avneesh Agrawal , Naga Bhushan , Tingfang Ji
IPC分类号： H04B17/00
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。
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57.发明授权公开(公告)号：US07706350B2
公开(公告)日：2010-04-27
申请号：US11022514
申请日：2004-12-22
申请人： Alexei Gorokhov , Avneesh Agrawal
发明人： Alexei Gorokhov , Avneesh Agrawal
IPC分类号： H04B7/208
CPC分类号： H04L5/0046 , H04L5/0007 , H04L5/0037 , H04L5/0042 , H04L5/06
摘要： The disclosed embodiments provide for methods and systems for flexibly allocating a shared frequency spectrum to a plurality of users, the spectrum may have a first number of segments, each segment having a second number of clusters associated with a certain sector/cell. In one aspect, a method for flexibly allocating a shared frequency spectrum to a plurality of users comprises the acts of fixedly assigning a first group of clusters to a first group of users, such that the first group of users stay fixed to the assigned clusters, and assigning a second group of clusters to a second group of users, such that the second group of users hop within the assigned clusters.
摘要翻译： 所公开的实施例提供了用于向多个用户灵活地分配共享频谱的方法和系统，频谱可以具有第一数量的段，每个段具有与特定扇区/小区相关联的第二数量的簇。 一方面，一种用于向多个用户灵活地分配共享频谱的方法包括将第一组群固定地分配给第一组用户的动作，使得第一组用户保持固定到所分配的群， 以及将第二组群集分配给第二组用户，使得所述第二组用户在所分配的群集内跳转。
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公开(公告)号：US07706324B2
公开(公告)日：2010-04-27
申请号：US11129636
申请日：2005-05-13
CPC分类号： H04W74/04 , H04W74/002
摘要： Pilots are transmitted on demand on a reverse link and used for channel estimation and data transmission on a forward link. A base station selects at least one terminal for on-demand pilot transmission on the reverse link. Each selected terminal is a candidate for receiving data transmission on the forward link. The base station assigns each selected terminal with a time-frequency allocation, which may be for a wideband pilot, a narrowband pilot, or some other type of pilot. The base station receives and processes on-demand pilot transmission from each selected terminal and derives a channel estimate for the terminal based on the received pilot transmission. The base station may schedule terminals for data transmission on the forward link based on the channel estimates for all selected terminals. The base station may also process data (e.g., perform beamforming or eigensteering) for transmission to each scheduled terminal based on its channel estimate.
摘要翻译： 飞行员根据需要在反向链路上传输，用于前向链路上的信道估计和数据传输。 基站在反向链路上选择至少一个用于按需导频发送的终端。 每个选择的终端是用于在前向链路上接收数据传输的候选者。 基站为每个选择的终端分配时间频率分配，其可以用于宽带导频，窄带导频或某种其他类型的导频。 基站从每个所选终端接收并处理按需导频传输，并根据接收到的导频传输导出终端的信道估计。 基站可以基于所有选择的终端的信道估计来安排在前向链路上进行数据传输的终端。 基站还可以基于其信道估计来处理数据（例如，执行波束成形或本征导向）以传输到每个调度的终端。
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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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60.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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