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1. 发明授权

US08576846B2 Peer-to-peer communication in ad hoc wireless network 有权
公开(公告)号：US08576846B2
公开(公告)日：2013-11-05
申请号：US11538222
申请日：2006-10-03
申请人： Ravi Kumar , J. Rodney Walton , Qiang Fu , Subrahmanyam Dravida
发明人： Ravi Kumar , J. Rodney Walton , Qiang Fu , Subrahmanyam Dravida
IPC分类号： H04L12/56
CPC分类号： H04W76/11 , H04L63/0428 , H04W8/005 , H04W12/04 , H04W12/06 , H04W28/0268 , H04W48/16 , H04W84/18
摘要： For a peer-to-peer call in an ad hoc wireless network, a wireless device performs discovery of a target wireless device, performs authentication of the target wireless device and generates a session key (e.g., using a pre-shared key or a certificate provisioned on the wireless device), forms an ad hoc wireless network with the target wireless device, and communicates peer-to-peer with the target wireless device via the ad hoc wireless network. The wireless device may perform discovery with a list of identifiers for wireless devices designated to communicate with this wireless device. The wireless device may derive a service set identifier (SSID) used to identify the ad hoc wireless network based on its user-specific identifier (e.g., its phone number) and/or a user-specific identifier for the target wireless device. The wireless device may also performs IP address discovery using the user-specific identifier for the target wireless device.

2. 发明授权

US09755785B2 Receiver for wireless communication network with extended range 有权
公开(公告)号：US09755785B2
公开(公告)日：2017-09-05
申请号：US12271836
申请日：2008-11-14
申请人： J. Rodney Walton , Mark S. Wallace
发明人： J. Rodney Walton , Mark S. Wallace
IPC分类号： H04B1/00 , H04L1/00 , H04B1/7073 , H04B1/7075 , H04L25/02 , H04L27/00
CPC分类号： H04L1/0072 , H04B1/7073 , H04B1/7075 , H04L1/0045 , H04L25/0204 , H04L25/0216 , H04L25/0228 , H04L27/0006 , H04L27/0014 , H04L2027/0038 , H04L2027/0065 , H04L2027/0097
摘要： Techniques for detecting and demodulating a signal/transmission are described. Signal detection is performed in multiple stages using different types of signal processing, e.g., using time-domain correlation for a first stage, frequency-domain processing for a second stage, and time-domain processing for a third stage. For the first stage, products of symbols are generated for at least two different delays, correlation between the products for each delay and known values is performed, and correlation results for all delays are combined and used to declare the presence of a signal. For demodulation, the timing of input samples is adjusted to obtain timing-adjusted samples. A frequency offset is estimated and removed from the timing-adjusted samples to obtain frequency-corrected samples, which are processed with a channel estimate to obtain detected symbols. The phases of the detected symbols are corrected to obtain phase-corrected symbols, which are demodulated, deinterleaved, and decoded.

3. 发明授权

US09031097B2 MIMO system with multiple spatial multiplexing modes 有权
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.

4. 发明授权

US08855226B2 Rate selection with margin sharing 有权
标题翻译：费率选择与保证金共享
公开(公告)号：US08855226B2
公开(公告)日：2014-10-07
申请号：US12270842
申请日：2008-11-13
申请人： Irina Medvedev , J. Rodney Walton
发明人： Irina Medvedev , J. Rodney Walton
IPC分类号： H04B7/02 , H04L1/00 , H04B7/04
CPC分类号： H04L1/0002 , H04B7/0413 , H04L1/0015 , Y02D50/10
摘要： Rate selection with margin sharing in a system with independent data stream rates is presented. Signal-to-Noise Ratio (SNR) estimates are obtained for each stream. Rates are selected for the streams based on the SNR estimates, such that at least one data stream has an SNR margin below a threshold, each remaining data stream has an SNR margin above a respective threshold, and the total SNR margin for all streams is above a total threshold. For rate selection with margin sharing with a vector-quantized rate set, SNR estimates are obtained for usable transmission channels. The total SNR margin is determined for each rate combination based on the estimates. Each rate combination is associated with a specific number of data streams to transmit, a specific rate for each data stream, and a specific overall throughput. The combination with the highest overall throughput and non-negative total SNR margin is selected.
摘要翻译：介绍了具有独立数据流速率的系统中利润分配的费率选择。获得每个流的信噪比（SNR）估计。基于SNR估计为流选择速率，使得至少一个数据流的SNR余量低于阈值，每个剩余数据流具有高于相应阈值的SNR裕度，并且所有流的总SNR余量高于总门槛。对于利用矢量量化速率集进行边缘共享的速率选择，可获得可用传输信道的SNR估计。基于估计，确定每个速率组合的总SNR容限。每个速率组合与要发送的特定数量的数据流，每个数据流的特定速率以及特定的总吞吐量相关联。选择具有最高总吞吐量和非负总体SNR余量的组合。

5. 发明授权

US08751576B2 Methods and systems for service discovery management in peer-to-peer networks 有权
标题翻译：对等网络中服务发现管理的方法和系统
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。

6. 发明授权

US08634438B2 Wireless communication systems with femto nodes 失效
标题翻译：带毫微微节点的无线通信系统
公开(公告)号：US08634438B2
公开(公告)日：2014-01-21
申请号：US12625061
申请日：2009-11-24
申请人： Sanjiv Nanda , Mehmet Yavuz , J. Rodney Walton , Peter J. Black
发明人： Sanjiv Nanda , Mehmet Yavuz , J. Rodney Walton , Peter J. Black
IPC分类号： H04W4/00 , H04B7/216 , H04B3/10 , H04J3/14
CPC分类号： H04W48/12 , H04W36/04 , H04W48/20 , H04W88/085
摘要： Systems and methods for performing a handoff of an access terminal from a macro node to a femto node are disclosed. To direct handoff of the access terminal, an identity of the femto node is determined. A femto node provided may be identified by at least a difference between the offset of a first pilot signal and the offset of a second pilot signal.
摘要翻译：公开了用于执行从宏节点到毫微微节点的接入终端切换的系统和方法。为了指示接入终端的切换，确定毫微微节点的身份。提供的毫微微节点可以通过至少第一导频信号的偏移与第二导频信号的偏移之间的差异来识别。

7. 发明授权

US08320301B2 MIMO WLAN system 有权
标题翻译： MIMO WLAN系统
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。

8. 发明申请

US20120213302A1 MULTI-ANTENNA TRANSMISSION FOR SPATIAL DIVISION MULTIPLE ACCESS 有权
标题翻译：用于空间多路访问的多天线传输
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。

9. 发明申请

US20110261899A1 METHOD AND APPARATUS FOR ALLOCATING downlink RESOURCES IN A MULTIPLE-INPUT MULTIPLE-OUTPUT (MIMO) COMMUNICATION SYSTEM 有权
标题翻译：用于在多输入多输出（MIMO）通信系统中分配下行链路资源的方法和装置
公开(公告)号：US20110261899A1
公开(公告)日：2011-10-27
申请号：US13030183
申请日：2011-02-18
申请人： J. Rodney Walton , Mark S. Wallace , Steven J. Howard
发明人： J. Rodney Walton , Mark S. Wallace , Steven J. Howard
IPC分类号： H04L27/00
CPC分类号： H04W16/00 , H04B7/0417 , H04B7/0452 , H04B7/061 , H04L1/0003 , H04L1/0009 , H04L1/0026 , H04L1/06 , H04L25/0204 , H04L2025/03426 , H04W16/28 , H04W84/14
摘要： Techniques to schedule downlink data transmission to a number of terminals in a wireless communication system. In one method, one or more sets of terminals are formed for possible data transmission, with each set including a unique combination of one or more terminals and corresponding to a hypothesis to be evaluated. One or more sub-hypotheses may further be formed for each hypothesis, with each sub-hypothesis corresponding to specific assignments of a number of transmit antennas to the one or more terminals in the hypothesis. The performance of each sub-hypothesis is then evaluated, and one of the evaluated sub-hypotheses is selected based on their performance. The terminal(s) in the selected sub-hypothesis are then scheduled for data transmission, and data is thereafter coded, modulated, and transmitted to each scheduled terminal from one or more transmit antennas assigned to the terminal.
摘要翻译：将无线通信系统中的下行链路数据传输调度到多个终端的技术。在一种方法中，形成一组或多组终端用于可能的数据传输，每组包括一个或多个终端的唯一组合，并对应于待评估的假设。可以针对每个假设进一步形成一个或多个子假设，其中每个子假设对应于假设中的一个或多个终端的多个发射天线的特定分配。然后评估每个子假设的性能，并根据其性能选择评估的子假设之一。然后将所选子假设中的终端调度用于数据传输，然后将数据从分配给终端的一个或多个发射天线编码，调制并发送到每个调度终端。

10. 发明申请

US20110055326A1 METHODS AND SYSTEMS FOR SERVICE DISCOVERY MANAGEMENT IN PEER-TO-PEER NETWORKS 有权
标题翻译：对等网络服务发现管理的方法与系统
公开(公告)号：US20110055326A1
公开(公告)日：2011-03-03
申请号：US12547672
申请日：2009-08-26
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 , G06F15/173 , G06F17/30
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。

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