专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明申请

US20090291690A1 Femtocell Channel Assignment and Power Control for Improved Femtocell Coverage and Efficient Cell Search 有权
标题翻译：蜂窝小区信道分配和功率控制，用于改进的毫微微小区覆盖和有效的小区搜索
公开(公告)号：US20090291690A1
公开(公告)日：2009-11-26
申请号：US12463307
申请日：2009-05-08
申请人： Ismail Guvenc , Moo Ryong Jeong , Fujio Watanabe , Hiroshi Inamura
发明人： Ismail Guvenc , Moo Ryong Jeong , Fujio Watanabe , Hiroshi Inamura
IPC分类号： H04W72/00 , H04W36/00 , H04B7/00 , H04B15/00
CPC分类号： H04W16/10 , H04W16/30 , H04W52/243 , H04W52/244 , H04W52/343 , H04W52/40 , H04W72/02 , H04W72/0453 , H04W72/082 , H04W84/045
摘要： A method and a communication system including femtocells within a macrocell efficiently manage interference between the different femtocells, and between each femtocell and a macrocell. An efficient frequency assignment scheme for the femtocells minimizes interference between a femtocell and a macrocell and among different femtocells using a spectrum-sensing technique carried out by the femtocells. The frequency assignment scheme selects a suitable channel from a set of candidate channels and ensures that the femtocell has an acceptable coverage area even when it is close to the macrocell base station (BS). The frequency assignment scheme favors a co-channel implementation to take advantage of the hand-off and cell search characteristics of the co-channel implementation. In one embodiment, a joint power control and frequency band assignment technique is used, which partitions the coverage area of the macrocell into an inner region, a power control region, and an outer region. Depending on a femtocell's location, it is assigned a certain power level and a frequency band. Power control may be used within the power-control region while, in the other regions, a fixed transmission power may be used.
摘要翻译：包括宏小区内的毫微微小区的方法和通信系统有效地管理不同毫微微小区之间以及每个毫微微小区与宏小区之间的干扰。毫微微小区的有效的频率分配方案使用由毫微微小区执行的频谱感测技术来最小化毫微微小区和宏小区之间以及不同毫微微小区之间的干扰。频率分配方案从一组候选信道中选择一个合适的信道，并确保毫微微小区即使在接近宏小区基站（BS）时也具有可接受的覆盖区域。频率分配方案有利于共同信道实现来利用同频道实现的切换和小区搜索特性。在一个实施例中，使用联合功率控制和频带分配技术，其将宏小区的覆盖区域划分为内部区域，功率控制区域和外部区域。根据毫微微小区的位置，它被分配一定的功率电平和频带。功率控制可以在功率控制区域内使用，而在其它区域中可以使用固定的发射功率。

2. 发明授权

US08280387B2 Femtocell channel assignment and power control for improved femtocell coverage and efficient cell search 有权
标题翻译：毫微微小区信道分配和功率控制，用于改进的毫微微小区覆盖和有效的小区搜索
公开(公告)号：US08280387B2
公开(公告)日：2012-10-02
申请号：US12463307
申请日：2009-05-08
申请人： Ismail Guvenc , Moo Ryong Jeong , Fujio Watanabe , Hiroshi Inamura
发明人： Ismail Guvenc , Moo Ryong Jeong , Fujio Watanabe , Hiroshi Inamura
IPC分类号： H04W40/00 , H04B7/00 , H04B15/00
CPC分类号： H04W16/10 , H04W16/30 , H04W52/243 , H04W52/244 , H04W52/343 , H04W52/40 , H04W72/02 , H04W72/0453 , H04W72/082 , H04W84/045
摘要： A method and a communication system including femtocells within a macrocell efficiently manage interference between the different femtocells, and between each femtocell and a macrocell. An efficient frequency assignment scheme for the femtocells minimizes interference between a femtocell and a macrocell and among different femtocells using a spectrum-sensing technique carried out by the femtocells. The frequency assignment scheme selects a suitable channel from a set of candidate channels and ensures that the femtocell has an acceptable coverage area even when it is close to the macrocell base station (BS). The frequency assignment scheme favors a co-channel implementation to take advantage of the hand-off and cell search characteristics of the co-channel implementation. In one embodiment, a joint power control and frequency band assignment technique is used, which partitions the coverage area of the macrocell into an inner region, a power control region, and an outer region. Depending on a femtocell's location, it is assigned a certain power level and a frequency band. Power control may be used within the power-control region while, in the other regions, a fixed transmission power may be used.
摘要翻译：包括宏小区内的毫微微小区的方法和通信系统有效地管理不同毫微微小区之间以及每个毫微微小区与宏小区之间的干扰。毫微微小区的有效的频率分配方案使用由毫微微小区执行的频谱感测技术来最小化毫微微小区和宏小区之间以及不同毫微微小区之间的干扰。频率分配方案从一组候选信道中选择一个合适的信道，并确保毫微微小区即使在接近宏小区基站（BS）时也具有可接受的覆盖区域。频率分配方案有利于共同信道实现来利用同频道实现的切换和小区搜索特性。在一个实施例中，使用联合功率控制和频带分配技术，其将宏小区的覆盖区域划分为内部区域，功率控制区域和外部区域。根据毫微微小区的位置，它被分配一定的功率电平和频带。功率控制可以在功率控制区域内使用，而在其它区域中可以使用固定的发射功率。

3. 发明申请

US20130051365A1 FEMTOCELL CHANNEL ASSIGNMENT AND POWER CONTROL FOR IMPROVED FEMTOCELL COVERAGE AND EFFICIENT CELL SEARCH 审中-公开
标题翻译： FEMTOCELL通道分配和功率控制，用于改进FEMTOCELL覆盖和有效的细胞搜索
公开(公告)号：US20130051365A1
公开(公告)日：2013-02-28
申请号：US13595815
申请日：2012-08-27
申请人： Ismail Guvenc , Moo Ryong Jeong , Fujio Watanabe , Hiroshi Inamura
发明人： Ismail Guvenc , Moo Ryong Jeong , Fujio Watanabe , Hiroshi Inamura
IPC分类号： H04W36/00
CPC分类号： H04W16/10 , H04W16/30 , H04W52/243 , H04W52/244 , H04W52/343 , H04W52/40 , H04W72/02 , H04W72/0453 , H04W72/082 , H04W84/045
摘要： A method and a communication system including femtocells within a macrocell efficiently manage interference between the different femtocells, and between each femtocell and a macrocell. An efficient frequency assignment scheme for the femtocells minimizes interference between a femtocell and a macrocell and among different femtocells using a spectrum-sensing technique carried out by the femtocells. The frequency assignment scheme selects a suitable channel from a set of candidate channels and ensures that the femtocell has an acceptable coverage area even when it is close to the macrocell base station (BS). The frequency assignment scheme favors a co-channel implementation to take advantage of the hand-off and cell search characteristics of the co-channel implementation. In one embodiment, a joint power control and frequency band assignment technique is used, which partitions the coverage area of the macrocell into an inner region, a power control region, and an outer region.
摘要翻译：包括宏小区内的毫微微小区的方法和通信系统有效地管理不同毫微微小区之间以及每个毫微微小区与宏小区之间的干扰。毫微微小区的有效的频率分配方案使用由毫微微小区执行的频谱感测技术来最小化毫微微小区和宏小区之间以及不同毫微微小区之间的干扰。频率分配方案从一组候选信道中选择一个合适的信道，并确保毫微微小区即使在接近宏小区基站（BS）时也具有可接受的覆盖区域。频率分配方案有利于共同信道实现来利用同频道实现的切换和小区搜索特性。在一个实施例中，使用联合功率控制和频带分配技术，其将宏小区的覆盖区划分成内部区域，功率控制区域和外部区域。

4. 发明申请

US20080170497A1 Proactive Per-Class Load Management 审中-公开
标题翻译：主动式每级负载管理
公开(公告)号：US20080170497A1
公开(公告)日：2008-07-17
申请号：US11868281
申请日：2007-10-05
申请人： Moo Ryong Jeong , Fujio Watanabe , Hiroshi Inamura
发明人： Moo Ryong Jeong , Fujio Watanabe , Hiroshi Inamura
IPC分类号： H04L12/26
CPC分类号： H04W28/08 , H04W84/12
摘要： An apparatus and a method proactively manage the load of an 802.11 WLAN based on one or more per-class station counts, in which the stations are classified according to access categories (ACs), user priorities (UPs), or services. Alternatively, the load of an 802.11 WLAN may also be proactively managed based on provisional or non-provisional per-class traffic specification (TSPECs), depending upon the status of traffic streams (TSs). Load balancing may be achieved by (a) collecting per-class station count information, either through an AP, or through exchanges with neighboring APs or wireless stations, and (b) proactively influencing association decisions between wireless stations and APs. A wireless station may be classified according to ACs, UPs, or services. Alternatively, load balancing may be achieved by (a) collecting provisional or non-provision per-class traffic specification (TSPEC) through an AP, or through exchanges with neighboring APs or wireless stations, and (b) proactively influencing association decisions between wireless stations and APs.
摘要翻译：一种装置和方法，主要根据一个或多个每类站点计数来管理802.11 WLAN的负载，其中根据接入类别（AC），用户优先级（UP）或服务来分类站。或者，取决于业务流（TS）的状态，802.11 WLAN的负载也可以基于临时或非临时每类流量规范（TSPEC）来主动管理。负载均衡可以通过以下方式实现：（a）通过AP或通过与相邻AP或无线站的交换来收集每类站点计数信息，以及（b）主动地影响无线站和AP之间的关联决定。无线站可以根据AC，UP或服务进行分类。或者，可以通过（a）通过AP收集临时或非提供的每类流量规范（TSPEC）或通过与相邻AP或无线站的交换来实现负载平衡，以及（b）主动影响无线站之间的关联决定和AP。

5. 发明申请

US20090069029A1 METHOD FOR AN IMPROVED LINEAR LEAST SQUARES ESTIMATION OF A MOBILE TERMINAL'S LOCATION UNDER LOS AND NLOS CONDITIONS AND USING MAP INFORMATION 有权
标题翻译：改进的线性最小二乘法在LOS和NLOS条件下使用移动终端位置的方法和使用地图信息的方法
公开(公告)号：US20090069029A1
公开(公告)日：2009-03-12
申请号：US12202611
申请日：2008-09-02
申请人： Ismail Guvenc , Fujio Watanabe , Hiroshi Inamura
发明人： Ismail Guvenc , Fujio Watanabe , Hiroshi Inamura
IPC分类号： H04Q7/20
CPC分类号： H04W64/00 , G01S5/0215 , G01S5/14
摘要： A linear least squares (LLS) estimator provides a low complexity estimation of the location of a mobile terminal (MT), using one of the fixed terminals (FTs) as a reference FT to derive a linear model. A method for selecting a reference FT is disclosed, which improves the location accuracy relative to an arbitrary approach to selecting the reference FT. In addition, a covariance-matrix based LLS estimator is proposed in line-of-sight (LOS) and non-LOS (NLOS) environments to further provide accuracy, taking advantage of the correlation of the observations. Different techniques for selecting the reference FT under non-LOS (NLOS) conditions are disclosed. A map-based two-stage LLS estimator assists in selecting the reference FT under NLOS conditions.
摘要翻译：线性最小二乘法（LLS）估计器使用固定终端（FT）中的一个作为参考FT提供对移动终端（MT）的位置的低复杂度估计，以导出线性模型。公开了一种用于选择参考FT的方法，其相对于选择参考FT的任意方法提高了位置精度。此外，在视距（LOS）和非LOS（NLOS）环境中提出了基于协方差矩阵的LLS估计器，以进一步提供准确性，利用观测的相关性。公开了在非LOS（NLOS）条件下选择参考FT的不同技术。基于地图的两级LLS估计器有助于在NLOS条件下选择参考FT。

6. 发明授权

US08219111B2 Method for an improved linear least squares estimation of a mobile terminal's location under LOS and NLOS conditions and using map information 有权
标题翻译：用于在LOS和NLOS条件下使用地图信息的移动终端的位置的改进的线性最小二乘估计的方法
公开(公告)号：US08219111B2
公开(公告)日：2012-07-10
申请号：US12202611
申请日：2008-09-02
申请人： Ismail Guvenc , Fujio Watanabe , Hiroshi Inamura
发明人： Ismail Guvenc , Fujio Watanabe , Hiroshi Inamura
IPC分类号： H04W4/00
CPC分类号： H04W64/00 , G01S5/0215 , G01S5/14
摘要： A linear least squares (LLS) estimator provides a low complexity estimation of the location of a mobile terminal (MT), using one of the fixed terminals (FTs) as a reference FT to derive a linear model. A method for selecting a reference FT is disclosed, which improves the location accuracy relative to an arbitrary approach to selecting the reference FT. In addition, a covariance-matrix based LLS estimator is proposed in line-of-sight (LOS) and non-LOS (NLOS) environments to further provide accuracy, taking advantage of the correlation of the observations. Different techniques for selecting the reference FT under non-LOS (NLOS) conditions are disclosed. A map-based two-stage LLS estimator assists in selecting the reference FT under NLOS conditions.
摘要翻译：线性最小二乘法（LLS）估计器使用固定终端（FT）中的一个作为参考FT提供对移动终端（MT）的位置的低复杂度估计，以导出线性模型。公开了一种用于选择参考FT的方法，其相对于选择参考FT的任意方法提高了位置精度。此外，在视距（LOS）和非LOS（NLOS）环境中提出了基于协方差矩阵的LLS估计器，以进一步提供准确性，利用观测的相关性。公开了在非LOS（NLOS）条件下选择参考FT的不同技术。基于地图的两级LLS估计器有助于在NLOS条件下选择参考FT。

7. 发明申请

US20080188253A1 METHOD AND SYSTEM FOR WIRELESS DESIGN SUBJECT TO INTERFERENCE CONSTRAINTS 审中-公开
标题翻译：用于干扰约束的无线设计的方法和系统
公开(公告)号：US20080188253A1
公开(公告)日：2008-08-07
申请号：US12019562
申请日：2008-01-24
申请人： Chia-Chin Chong , Pedro C. Pinto , Moe Z. Win , Fujio Watanabe , Hiroshi Inamura
发明人： Chia-Chin Chong , Pedro C. Pinto , Moe Z. Win , Fujio Watanabe , Hiroshi Inamura
IPC分类号： H04B15/00 , H04B7/00
CPC分类号： H04W16/22
摘要： A wireless communication system experience interference from other wireless communication networks. A method for designing wireless communication systems subject to interference is proposed based on a realistic interference model which accounts for the propagation effects introduced by the wireless environment (such as path loss, shadowing, and multipath fading), and for the spatial scattering of transmitters (using a Poisson field). The method accounts for tradeoffs between network parameters, such as signal-to-noise ratio (SNR), interference-to-noise ratio (INR), path loss exponent, spatial density of the interferers, and error probability. Advantages of this method include: 1) a unified framework for designing a wireless system, subject to cumulative interference and noise, incorporating a wide range of performance metrics; and 2) a general application that covers a broad class of wireless communication systems and channel fading distributions.
摘要翻译：无线通信系统经受来自其他无线通信网络的干扰。提出了一种用于设计受干扰的无线通信系统的方法，该实际干扰模型考虑了由无线环境引入的传播效应（如路径损耗，阴影和多径衰落）以及发射机的空间散射（使用泊松场）。该方法考虑了网络参数之间的折衷，如信噪比（SNR），干扰信噪比（INR），路径损耗指数，干扰源的空间密度和误差概率。该方法的优点包括：1）设计无线系统的统一框架，受到累积干扰和噪声的影响，并结合广泛的性能指标; 和2）涵盖广泛类别的无线通信系统和信道衰落分布的通用应用。

8. 发明授权

US08107428B2 Method of ranging signal design and transmission for MIMO-OFDMA initial ranging process 有权
标题翻译： MIMO-OFDMA初始测距过程的测距信号设计和传输方法
公开(公告)号：US08107428B2
公开(公告)日：2012-01-31
申请号：US12277110
申请日：2008-11-24
申请人： Chia-Chin Chong , Hlaing Minn , Fujio Watanabe , Hiroshi Inamura
发明人： Chia-Chin Chong , Hlaing Minn , Fujio Watanabe , Hiroshi Inamura
IPC分类号： H04W4/00 , H04J11/00 , H04L27/28
CPC分类号： H04J3/0682 , H04J13/16 , H04L5/0007 , H04L27/2613 , H04L27/2626 , H04L27/2655 , H04L27/2684
摘要： A mobile communication system uses a multiple-input-multiple-output (MIMO) technology with an orthogonal frequency division multiplexing access (OFDMA) scheme. At network entry, an initial ranging method selects from multiple ranging signal designs to accomplish the initial ranging process. Three classes of ranging signal designs may be selected for use in generating ranging codes. The information on the ranging signal design to be used, which is selected by the base station based on the cell size of the communication system (i.e., the radio coverage area of the base station), is broadcast from the BS. The ranging signal designs are directly applicable to single-antenna systems, and they are applied to MIMO systems by using appropriate mapping across transmit antennas based on the adopted MIMO ranging transmission scheme. Optimum eigenmode and suboptimum eigenmode transmission schemes provide the best performance at high computational complexity and high power consumption.
摘要翻译：移动通信系统使用具有正交频分复用接入（OFDMA）方案的多输入多输出（MIMO）技术。在网络入口处，初始测距方法从多个测距信号设计中选择，以完成初始测距过程。可以选择三类测距信号设计用于生成测距码。从基站通过基站根据通信系统的小区大小（即，基站的无线覆盖区域）选择的要使用的测距信号设计的信息。测距信号设计直接适用于单天线系统，并且通过基于所采用的MIMO测距传输方案，通过使用跨发射天线的适当映射将其应用于MIMO系统。最佳本征模式和次优本征模式传输方案在高计算复杂度和高功耗下提供最佳性能。

9. 发明申请

US20090116422A1 METHOD AND SYSTEM FOR OPPORTUNISTIC HYBRID RELAY SELECTION SCHEME FOR DOWNLINK TRANSMISSION 审中-公开
标题翻译：用于下行链路传输的机动混合继电器选择方案的方法和系统
公开(公告)号：US20090116422A1
公开(公告)日：2009-05-07
申请号：US12257334
申请日：2008-10-23
申请人： Chia-Chin Chong , Fujio Watanabe , Hiroshi Inamura
发明人： Chia-Chin Chong , Fujio Watanabe , Hiroshi Inamura
IPC分类号： H04B7/14
CPC分类号： H04B7/026 , H04B7/15592
摘要： An opportunistic hybrid-relay selection scheme for downlink transmission selects between cooperative relay and single relay schemes based on the channel conditions (e.g., signal-to-noise-ratio (SNR)) between the base station (BS) and RSs (i.e., BS-RSs link) and RSs and mobile station (MS) (i.e., RSs-MS link), respectively. In another selection scheme, a selection between the single relay (e.g., best-relay) transmission scheme or the cooperative-relay transmission scheme may be determined based on transmission paths (e.g., line-of-sight, obstructed-light-of-sight, non-light-of-sight) and channel conditions (e.g., SNR) between the BS-RSs link and the RSs-MS link, respectively.
摘要翻译：用于下行链路传输的机会混合中继选择方案基于基站（BS）和RS之间的信道条件（例如，信噪比（SNR））来选择协作中继和单中继方案之间的选择（即，BS -RSs链路）和RSs和移动站（MS）（即RSs-MS链路）。在另一种选择方案中，可以基于传输路径（例如，视线，视障碍的视线）来确定单个中继（例如，最佳中继）传输方案或协作中继传输方案之间的选择，非光线）和BS-RS链路和RS-MS链路之间的信道条件（例如，SNR）。

10. 发明申请

US20080267304A1 METHOD AND SYSTEM FOR JOINT TIME-OF-ARRIVAL AND AMPLITUDE ESTIMATION BASED ON A SUPER-RESOLUTION TECHNIQUE 有权
标题翻译：基于超分辨率技术的接合时间和幅度估计的方法和系统
公开(公告)号：US20080267304A1
公开(公告)日：2008-10-30
申请号：US12106188
申请日：2008-04-18
申请人： Chia-Chin Chong , Fujio Watanabe , Hiroshi Inamura
发明人： Chia-Chin Chong , Fujio Watanabe , Hiroshi Inamura
IPC分类号： H04L27/28
CPC分类号： H04L25/0202 , G01S3/043 , G01S5/0215 , G01S5/0221 , G01S11/02 , H04B1/7105 , H04B1/7107 , H04B1/7115
摘要： In a geolocation application, a method is provided to jointly estimate the time-of-arrival (TOA) and the amplitude of a received signal based on super-resolution technique. The super-resolution joint TOA-amplitude estimators are provided based on either the expectation-maximization (EM), parallel-interference-cancellation space-alternating generalized expectation maximization (PIC-SAGE) or serial-interference-cancellation SAGE (SIC-SAGE). The SIC-SAGE estimator minimizes the ranging estimation error especially under a non-line-of-sight (NLOS) condition. The SIC-SAGE estimator is a simplified version of the maximum likelihood estimator with more stable performance in a multipath rich environment, such as the ultra-wideband (UWB) based applications. These techniques provide the following benefits: 1) it is generic, so that signal processing can be deployed on both time-domain (e.g., UWB impulse-radio) and frequency-domain (e.g., multi-band orthogonal frequency-division multiplexing (MB-OFDM)) based transceiver schemes and applicable for both UWB and non-UWB systems; 2) it is robust especially under NLOS condition and multipath rich environment.
摘要翻译：在地理位置应用中，提供了一种基于超分辨率技术共同估计接收信号的时间（TOA）和接收信号幅度的方法。基于期望最大化（EM），并行干扰消除空间交替广义期望最大化（PIC-SAGE）或串行干扰消除SAGE（SIC-SAGE）提供超分辨率联合TOA幅度估计器，。 SIC-SAGE估计器最小化了测距估计误差，特别是在非视距（NLOS）条件下。 SIC-SAGE估计器是最大似然估计器的简化版本，在富路由多环境中具有更稳定的性能，例如基于超宽带（UWB）的应用。这些技术提供以下优点：1）它是通用的，使得信号处理可以在时域（例如，UWB脉冲无线电）和频域上部署（例如，多频带正交频分复用（MB -OFDM））收发器方案，适用于UWB和非UWB系统; 2）特别是在NLOS条件和多路径丰富的环境下，它是强大的。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式