公开(公告)号：US09031097B2

公开(公告)日：2015-05-12

申请号：US12649040

申请日：2009-12-29

申请人： J. Rodney Walton ,  John W. Ketchum ,  Mark S. Wallace ,  Steven J. Howard

发明人： J. Rodney Walton ,  John W. Ketchum ,  Mark S. Wallace ,  Steven J. Howard

IPC分类号： H04J11/00 ,  H04B7/14 ,  H04B7/04 ,  H04L25/02 ,  H04B7/06 ,  H04B7/08 ,  H04L1/00 ,  H04L1/06 ,  H04W74/04 ,  H04W72/04 ,  H04L5/00 ,  H04L27/26 ,  H04L25/03 ,  H04W16/28 ,  H04W52/50

CPC分类号： H04B7/0417 ,  H04B7/0421 ,  H04B7/043 ,  H04B7/0434 ,  H04B7/0452 ,  H04B7/0628 ,  H04B7/0669 ,  H04B7/0689 ,  H04B7/0697 ,  H04B7/0854 ,  H04B7/0871 ,  H04J11/003 ,  H04J11/0053 ,  H04L1/0001 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0017 ,  H04L1/06 ,  H04L5/0073 ,  H04L25/0224 ,  H04L25/0226 ,  H04L25/0242 ,  H04L25/0248 ,  H04L25/03343 ,  H04L25/03891 ,  H04L27/2601 ,  H04L27/2602 ,  H04L27/261 ,  H04L27/2647 ,  H04L27/2675 ,  H04W16/28 ,  H04W52/50 ,  H04W72/046 ,  H04W74/04

摘要： A MIMO system supports multiple spatial multiplexing modes for improved performance and greater flexibility. These modes may include (1) a single-user steered mode that transmits multiple data streams on orthogonal spatial channels to a single receiver, (2) a single-user non-steered mode that transmits multiple data streams from multiple antennas to a single receiver without spatial processing at a transmitter, (3) a multi-user steered mode that transmits multiple data streams simultaneously to multiple receivers with spatial processing at a transmitter, and (4) a multi-user non-steered mode that transmits multiple data streams from multiple antennas (co-located or non co-located) without spatial processing at the transmitter(s) to receiver(s) having multiple antennas. For each set of user terminal(s) selected for data transmission on the downlink and/or uplink, a spatial multiplexing mode is selected for the user terminal set from among the multiple spatial multiplexing modes supported by the system.

公开(公告)号：US08751576B2

公开(公告)日：2014-06-10

申请号：US13274211

申请日：2011-10-14

申请人： Oliver Michaelis ,  J. Rodney Walton ,  John W. Ketchum

发明人： Oliver Michaelis ,  J. Rodney Walton ,  John W. Ketchum

IPC分类号： G06F15/16 ,  H04L29/06

CPC分类号： H04L29/06326 ,  H04L67/04 ,  H04L67/16 ,  H04L67/18 ,  H04W4/00 ,  H04W48/08 ,  H04W48/16 ,  H04W76/20 ,  H04W92/18

摘要： Certain embodiments of the present disclosure relate to a method and an apparatus for managing and optimizing service discovery in a peer-to-peer (P2P) wireless network. Nodes of the P2P network advertise their capabilities to their peers in the form of services. Efficient propagation and management of node's services to other nodes is proposed in the present disclosure.

摘要翻译： 本公开的某些实施例涉及用于在对等（P2P）无线网络中管理和优化服务发现的方法和装置。 P2P网络的节点以服务的形式向他们的对等体发布他们的能力。 在本公开中提出了节点对其他节点的服务的有效传播和管理。

公开(公告)号：US08600297B2

公开(公告)日：2013-12-03

申请号：US12510916

申请日：2009-07-28

申请人： John W. Ketchum ,  Srinath Nagaraj ,  Ashok Bhatia ,  Eric J. Katzfey ,  Lalitaprasad V. Daita ,  Sekharjyoti Baruah

发明人： John W. Ketchum ,  Srinath Nagaraj ,  Ashok Bhatia ,  Eric J. Katzfey ,  Lalitaprasad V. Daita ,  Sekharjyoti Baruah

IPC分类号： H04B7/19

CPC分类号： H04J3/0688 ,  H04W56/0035 ,  H04W64/003 ,  H04W84/045

摘要： Devices and methods are provided for providing self-timing and self-locating in an access point (AP) base station. In one embodiment, the method involves receiving Satellite Positioning System (SPS) signals from a first data source (e.g., plurality of satellites), wherein the SPS signals may include SPS time data, SPS frequency data, and SPS position data. The method may further involve obtaining from a second data source (e.g., cell site, terrestrial navigation station, server, user input interface, etc.) at least one of second time data, second frequency data and second position data, and determining relative reliability of the first and second data sources.

摘要翻译： 提供了用于在接入点（AP）基站中提供自定时和自定位的设备和方法。 在一个实施例中，该方法包括从第一数据源（例如，多个卫星）接收卫星定位系统（SPS）信号，其中SPS信号可以包括SPS时间数据，SPS频率数据和SPS位置数据。 该方法还可以包括从第二数据源（例如，小区站点，地面导航站，服务器，用户输入接口等）获得第二时间数据，第二频率数据和第二位置数据中的至少一个，以及确定相对可靠性 的第一和第二数据源。

公开(公告)号：US08488706B2

公开(公告)日：2013-07-16

申请号：US12559318

申请日：2009-09-14

申请人： John W. Ketchum ,  Steven J. Howard ,  Jay Rod Walton ,  Mark S. Wallace ,  Fuyun Ling

发明人： John W. Ketchum ,  Steven J. Howard ,  Jay Rod Walton ,  Mark S. Wallace ,  Fuyun Ling

IPC分类号： H04B7/02

CPC分类号： H04W52/346 ,  H04L1/0009 ,  H04L1/0068 ,  H04L1/06 ,  H04L5/0023 ,  H04L5/0037 ,  H04L5/0046 ,  H04L5/006 ,  H04L5/06 ,  H04L25/03343 ,  H04L2001/0096 ,  H04W52/24 ,  H04W52/42

摘要： Techniques to process data for transmission over a set of transmission channels selected from among all available transmission channels. In an aspect, the data processing includes coding data based on a common coding and modulation scheme to provide modulation symbols and pre-weighting the modulation symbols for each selected channel based on the channel's characteristics. The pre-weighting may be achieved by “inverting” the selected channels so that the received SNRs are approximately similar for all selected channels. With selective channel inversion, only channels having SNRs at or above a particular threshold are selected, “bad” channels are not used, and the total available transmit power is distributed across only “good” channels. Improved performance is achieved due to the combined benefits of using only the NS best channels and matching the received SNR of each selected channel to the SNR required by the selected coding and modulation scheme.

摘要翻译： 用于处理数据以在从所有可用传输信道中选择的一组传输信道上进行传输的技术。 在一方面，数据处理包括基于公共编码和调制方案的编码数据，以提供调制符号并且基于该信道的特征对每个所选择的信道预先加权调制符号。 预加权可以通过“反转”所选择的信道来实现，使得接收的SNR对于所有选择的信道大致相似。 通过选择性信道反转，仅选择具有等于或高于特定阈值的SNR的信道，不使用“坏”信道，并且总可用发射功率仅在“良好”信道上分布。 由于仅使用NS最佳通道并将每个所选信道的接收SNR与所选择的编码和调制方案所需的SNR相匹配的优点，可以实现改进的性能。

公开(公告)号：US08472473B2

公开(公告)日：2013-06-25

申请号：US10964237

申请日：2004-10-13

申请人： John W. Ketchum ,  Jay Rodney Walton ,  Sanjiv Nanda

发明人： John W. Ketchum ,  Jay Rodney Walton ,  Sanjiv Nanda

IPC分类号： H04J3/22

CPC分类号： H04W28/065 ,  H04L1/1635 ,  H04L25/03343 ,  H04L29/06 ,  H04L47/2441 ,  H04L69/16 ,  H04L69/161 ,  H04L69/22 ,  H04L69/32 ,  H04W80/02 ,  H04W84/12

摘要： Embodiments addressing MAC processing for efficient use of high throughput systems are disclosed. In one aspect, a protocol stack is disclosed comprising one or more of the following: an adaptation layer, a data link control layer, a physical layer, and a layer manager. In another aspect, physical layer feedback is used for adaptation layer processing. In one embodiment, physical layer feedback is used for segmentation. In another embodiment, physical layer feedback is used for multicast mapping onto one or more unicast channels. In another aspect, a data unit for transmission from a first station to a second station comprises zero or more complete sub-data units, zero or one partial sub-data units from a prior transmission, and zero or one partial sub-data units to fill the data unit. In one embodiment, a pointer may be used to indicate the location of any complete sub-data units.

摘要翻译： 公开了解决用于高吞吐量系统的有效使用的MAC处理的实施例。 一方面，公开了一种协议栈，其包括以下一个或多个：适配层，数据链路控制层，物理层和层管理器。 在另一方面，物理层反馈用于适应层处理。 在一个实施例中，物理层反馈用于分割。 在另一个实施例中，物理层反馈用于到一个或多个单播信道上的多播映射。 在另一方面，用于从第一站到第二站的传输的数据单元包括零个或多个完整的子数据单元，来自先前传输的零个或一个部分子数据单元，以及零个或一个部分子数据单元 填写数据单元。 在一个实施例中，可以使用指针来指示任何完整的子数据单元的位置。

公开(公告)号：US08320301B2

公开(公告)日：2012-11-27

申请号：US10693419

申请日：2003-10-23

申请人： J. Rodney Walton ,  Mark S. Wallace ,  John W. Ketchum ,  Steven J. Howard

发明人： J. Rodney Walton ,  Mark S. Wallace ,  John W. Ketchum ,  Steven J. Howard

IPC分类号： H04W4/00 ,  H04L7/02

CPC分类号： H04L5/0048 ,  H04B7/022 ,  H04B7/0421 ,  H04B7/043 ,  H04B7/0443 ,  H04B7/0669 ,  H04B7/0689 ,  H04B7/0697 ,  H04B7/0854 ,  H04B7/0871 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0017 ,  H04L1/0025 ,  H04L1/0059 ,  H04L1/0061 ,  H04L1/0069 ,  H04L1/0071 ,  H04L1/0606 ,  H04L1/0625 ,  H04L1/0656 ,  H04L1/08 ,  H04L1/16 ,  H04L1/1887 ,  H04L5/0023 ,  H04L25/0204 ,  H04L25/0226 ,  H04L25/0228 ,  H04L25/0248 ,  H04L25/03343 ,  H04L27/2602 ,  H04L27/2607 ,  H04L27/2647 ,  H04L2025/03414 ,  H04L2025/03426 ,  H04W28/20 ,  H04W28/22 ,  H04W52/42 ,  H04W52/50 ,  H04W72/12 ,  H04W84/12

摘要： A multiple-access MIMO WLAN system that employs MIMO, OFDM, and TDD. The system (1) uses a channel structure with a number of configurable transport channels, (2) supports multiple rates and transmission modes, which are configurable based on channel conditions and user terminal capabilities, (3) employs a pilot structure with several types of pilot (e.g., beacon, MIMO, steered reference, and carrier pilots) for different functions, (4) implements rate, timing, and power control loops for proper system operation, and (5) employs random access for system access by the user terminals, fast acknowledgment, and quick resource assignments. Calibration may be performed to account for differences in the frequency responses of transmit/receive chains at the access point and user terminals. The spatial processing may then be simplified by taking advantage of the reciprocal nature of the downlink and uplink and the calibration.

摘要翻译： 采用MIMO，OFDM和TDD的多接入MIMO WLAN系统。 系统（1）使用具有多个可配置传输信道的信道结构，（2）支持基于信道条件和用户终端能力可配置的多种速率和传输模式，（3）采用具有多种类型 （4）实现速率，定时和功率控制环路，实现系统正常运行，（5）采用随机接入方式进行系统接入，由用户终端 ，快速确认和快速的资源分配。 可以执行校准以考虑接入点和用户终端处的发射/接收链的频率响应的差异。 然后可以通过利用下行链路和上行链路的相互性质和校准来简化空间处理。

公开(公告)号：US20120213302A1

公开(公告)日：2012-08-23

申请号：US11869547

申请日：2007-10-09

申请人： J. Rodney Walton ,  John W. Ketchum ,  John Edward Smee ,  Mark S. Wallace ,  Steven J. Howard

发明人： J. Rodney Walton ,  John W. Ketchum ,  John Edward Smee ,  Mark S. Wallace ,  Steven J. Howard

IPC分类号： H04B7/02

CPC分类号： H04B7/043 ,  H04B1/71072 ,  H04B7/0408 ,  H04B7/0413 ,  H04B7/0421 ,  H04B7/0617 ,  H04B7/0619 ,  H04B7/0697 ,  H04B17/309 ,  H04L5/023 ,  H04W16/28

摘要： An uplink channel response matrix is obtained for each terminal and decomposed to obtain a steering vector used by the terminal to transmit on the uplink. An “effective” uplink channel response vector is formed for each terminal based on its steering vector and its channel response matrix. Multiple sets of terminals are evaluated based on their effective channel response vectors to determine the best set (e.g., with highest overall throughput) for uplink transmission. Each selected terminal performs spatial processing on its data symbol stream with its steering vector and transmits its spatially processed data symbol stream to an access point. The multiple selected terminals simultaneously transmit their data symbol streams via their respective MIMO channels to the access point. The access point performs receiver spatial processing on its received symbol streams in accordance with a receiver spatial processing technique to recover the data symbol streams transmitted by the selected terminals.

摘要翻译： 获得每个终端的上行链路信道响应矩阵，并对其进行分解，得到终端在上行链路上使用的导向矢量。 基于其导向向量及其信道响应矩阵，为每个终端形成“有效”上行链路信道响应向量。 基于其有效信道响应向量来评估多组终端，以确定用于上行链路传输的最佳集合（例如具有最高总吞吐量）。 每个选择的终端利用其导向向量对其数据符号流执行空间处理，并将其空间处理的数据符号流发送到接入点。 多个选择的终端通过其相应的MIMO信道同时将其数据符号流发送到接入点。 接入点根据接收机空间处理技术对其接收到的符号流执行接收机空间处理，以恢复由所选终端发送的数据符号流。

公开(公告)号：US08204149B2

公开(公告)日：2012-06-19

申请号：US11008865

申请日：2004-12-09

申请人： Jay Rodney Walton ,  Lizhong Zheng ,  John W. Ketchum ,  Mark S. Wallace ,  Steven J. Howard

发明人： Jay Rodney Walton ,  Lizhong Zheng ,  John W. Ketchum ,  Mark S. Wallace ,  Steven J. Howard

IPC分类号： H04L27/26 ,  H04B7/06

CPC分类号： H04B7/0417 ,  H04B7/0456 ,  H04B7/0669 ,  H04B17/336 ,  H04L1/06

摘要： Spatial spreading is performed in a multi-antenna system to randomize an “effective” channel observed by a receiving entity for each transmitted data symbol block. For a MIMO system, at a transmitting entity, data is processed (e.g., encoded, interleaved, and modulated) to obtain ND data symbol blocks to be transmitted in NM transmission spans, where ND≧1 and NM>1. The ND blocks are partitioned into NM data symbol subblocks, one subblock for each transmission span. A steering matrix is selected (e.g., in a deterministic or pseudo-random manner from among a set of L steering matrices, where L>1) for each subblock. Each data symbol subblock is spatially processed with the steering matrix selected for that subblock to obtain transmit symbols, which are further processed and transmitted via NT transmit antennas in one transmission span. The ND data symbol blocks are thus spatially processed with NM steering matrices and observe an ensemble of channels.

摘要翻译： 在多天线系统中执行空间扩展，以随机化接收实体针对每个发送的数据符号块观察到的“有效”信道。 对于MIMO系统，在发送实体处理（例如，编码，交织和调制）数据，以获得将以NM≥1和NM> 1的NM传输跨度发送的ND数据符号块。 ND块被划分为NM数据符号子块，每个传输跨度的一个子块。 对于每个子块，选择导向矩阵（例如，以确定性或伪随机方式从一组L个导引矩阵中，其中L> 1）。 每个数据符号子块用为该子块选择的导引矩阵进行空间处理，以获得在一个传输范围内经由NT个发射天线进一步处理和传输的发射符号。 因此，ND数据符号块用NM导引矩阵进行空间处理，并观察信道的集合。

公开(公告)号：US08040965B2

公开(公告)日：2011-10-18

申请号：US12499951

申请日：2009-07-09

申请人： John W. Ketchum ,  Steven J. Howard ,  Jay Rod Walton ,  Mark S. Wallace ,  Fuyun Ling

发明人： John W. Ketchum ,  Steven J. Howard ,  Jay Rod Walton ,  Mark S. Wallace ,  Fuyun Ling

IPC分类号： H04L27/28

CPC分类号： H04W52/346 ,  H04L1/0009 ,  H04L1/0068 ,  H04L1/06 ,  H04L5/0023 ,  H04L5/0037 ,  H04L5/0046 ,  H04L5/006 ,  H04L5/06 ,  H04L25/03343 ,  H04L2001/0096 ,  H04W52/24 ,  H04W52/42

摘要： Techniques to process data for transmission over a set of transmission channels selected from among all available transmission channels. In an aspect, the data processing includes coding data based on a common coding and modulation scheme to provide modulation symbols and pre-weighting the modulation symbols for each selected channel based on the channel's characteristics. The pre-weighting may be achieved by “inverting” the selected channels so that the received SNRs are approximately similar for all selected channels. With selective channel inversion, only channels having SNRs at or above a particular threshold are selected, “bad” channels are not used, and the total available transmit power is distributed across only “good” channels. Improved performance is achieved due to the combined benefits of using only the NS best channels and matching the received SNR of each selected channel to the SNR required by the selected coding and modulation scheme.

摘要翻译： 用于处理数据以在从所有可用传输信道中选择的一组传输信道上进行传输的技术。 在一方面，数据处理包括基于公共编码和调制方案的编码数据，以提供调制符号并且基于该信道的特征对每个所选择的信道预先加权调制符号。 预加权可以通过“反转”所选择的信道来实现，使得接收的SNR对于所有选择的信道大致相似。 通过选择性信道反转，仅选择具有等于或高于特定阈值的SNR的信道，不使用“坏”信道，并且总可用发射功率仅在“良好”信道上分布。 由于仅使用NS最佳通道并将每个所选信道的接收SNR与所选择的编码和调制方案所需的SNR相匹配的优点，可以实现改进的性能。

公开(公告)号：US07953047B2

公开(公告)日：2011-05-31

申请号：US11042921

申请日：2005-01-24

申请人： Mark S. Wallace ,  John W. Ketchum

发明人： Mark S. Wallace ,  John W. Ketchum

IPC分类号： H04B7/216 ,  H04J13/00 ,  H04J3/07 ,  H04B3/46

CPC分类号： H04L1/0069 ,  H04L1/0041 ,  H04L1/0059

摘要： Techniques to parse data into multiple (M) streams with selectable data rates are described. The modulation scheme and code rate for each stream are determined based on the data rate selected for that stream. The modulation schemes and code rates for all M streams are used to determine a parse cycle and the number of puncture cycles for each stream in the parse cycle. A sequence of puncture cycles is formed for the M streams such that the puncture cycle(s) for each stream are distributed as evenly as possible across the sequence. An encoder encodes traffic data in accordance with a base code (e.g., a rate 1/2 binary convolutional code) and generates code bits. A parser then parses the code bits into the M streams based on the sequence of puncture cycles, one puncture cycle at a time and in the order indicated by the sequence.

摘要翻译： 描述了以可选择的数据速率将数据解析成多个（M）流的技术。 基于为该流选择的数据速率来确定每个流的调制方案和码率。 所有M个流的调制方案和码率用于确定分析周期中每个流的解析周期和穿孔次数。 形成针对M个流的穿刺周期的序列，使得每个流的穿刺循环在整个序列上尽可能均匀地分布。 编码器根据基本码（例如，速率1​​/2二进制卷积码）编码业务数据，并生成码位。 解析器然后基于穿刺周期的序列，一次一次的穿刺周期和按序列表示的顺序将代码位解析成M个流。