利索-全球专利检索

  1. Login
  2. Sign Up

Search Results

99 records (took 0.045 seconds)

    Mode and rate control for MIMO transmission
    2.
    发明授权
    Mode and rate control for MIMO transmission 有权
    MIMO传输的模式和速率控制

    公开(公告)号：US08615053B2

    公开(公告)日：2013-12-24

    申请号：US13277444

    申请日：2011-10-20

    Applicant: Mark S Wallace ,  J Rodney Walton

    Inventor： Mark S Wallace ,  J Rodney Walton

    IPC: H04B7/02 ,  H04L1/02

    CPC classification number: H04B7/043 ,  H04L1/0002 ,  H04L5/0007 ,  H04L25/0224

    Abstract: Techniques for performing mode and rate control for a MIMO transmission are described. For mode selection, the use of an eigensteering mode is permitted if a first set of at least one criterion is satisfied. The eigensteering mode is selected for data transmission if a second set of at least one criterion is satisfied, and an unsteered mode is selected otherwise. For rate selection, SNR estimates are derived for data streams to potentially transmit, e.g., based on channel estimates and/or data symbol estimates. The number of data streams to transmit as well as at least one rate for at least one data stream to transmit are selected based on the SNR estimates and at least one backoff factor. The backoff factor(s) are adjusted based on status of received packets. The at least one rate may be adjusted based on the age of rate information. Other aspects, features, and embodiments are also claimed and described.

    Abstract translation: 描述了用于执行MIMO传输的模式和速率控制的技术。 对于模式选择，如果满足至少一个标准的第一组，则允许使用本征转向模式。 如果满足至少一个标准的第二组，则选择本征转向模式用于数据传输，否则选择非导向模式。 对于速率选择，导出用于例如基于信道估计和/或数据符号估计可能传输的数据流的SNR估计。 基于SNR估计和至少一个退避因子来选择要发送的数据流的数量以及用于要发送的至少一个数据流的至少一个速率。 基于接收到的分组的状态来调整退避因子。 可以基于速率信息的年龄来调整至少一个速率。 还要求和描述其它方面，特征和实施例。

    Peer-to-peer communication in ad hoc wireless network
    3.
    发明授权
    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

    Applicant: Ravi Kumar ,  J. Rodney Walton ,  Qiang Fu ,  Subrahmanyam Dravida

    Inventor： Ravi Kumar ,  J. Rodney Walton ,  Qiang Fu ,  Subrahmanyam Dravida

    IPC: H04L12/56

    CPC classification number: H04W76/11 ,  H04L63/0428 ,  H04W8/005 ,  H04W12/04 ,  H04W12/06 ,  H04W28/0268 ,  H04W48/16 ,  H04W84/18

    Abstract: 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.

    Multiple frequency band operation in wireless networks
    5.
    发明授权
    Multiple frequency band operation in wireless networks 有权
    无线网络中的多频段操作

    公开(公告)号：US08462709B2

    公开(公告)日：2013-06-11

    申请号：US12507850

    申请日：2009-07-23

    Applicant: Sanjiv Nanda ,  Shravan K. Surineni ,  J. Rodney Walton

    Inventor： Sanjiv Nanda ,  Shravan K. Surineni ,  J. Rodney Walton

    IPC: H04W4/00

    CPC classification number: H04W72/02 ,  H04W16/14 ,  H04W24/00 ,  H04W76/10

    Abstract: Embodiments for bandwidth allocation methods, detecting interference with other systems, and/or redeploying in alternate bandwidth are described. Higher bandwidth channels may be deployed at channel boundaries (410), which are a subset of those for lower bandwidth channels (310), and may be restricted from overlapping. Interference may be detected (930) on primary, secondary, or a combination of channels, and may be detected in response to energy measurements (910) of the various channels. When interference is detected, a higher bandwidth Basic Service Set (BSS)(100) may be relocated to an alternate channel, or may have its bandwidth reduced to avoid interference. Interference may be detected based on energy measured on the primary or secondary channel, and/or a difference between the two. An FFT (1010) may be used in energy measurement in either or both of the primary and secondary channels. Stations may also monitor messages from alternate systems to make channel allocation decisions. Various other aspects are also presented.

    Abstract translation: 描述带宽分配方法的实施例，检测与其他系统的干扰和/或以备用带宽重新部署。 较高带宽信道可以部署在作为较低带宽信道（310）的子集的信道边界（410）处，并且可以被限制以重叠。 可以在主要，次要或信道的组合上检测（930）干扰，并且可以响应于各种信道的能量测量（910）来检测干扰。 当检测到干扰时，可以将更高带宽的基本业务集（BSS）（100）重新定位到备用信道，或者可以减少其带宽以避免干扰。 可以基于在主要或次要信道上测量的能量和/或两者之间的差异来检测干扰。 可以在主要和次要信道中的一个或两个中的能量测量中使用FFT（1010）。 站点还可以监视来自备用系统的消息以进行信道分配决定。 还提出了各种其他方面。

    Detection of stations for wireless communication
    7.
    发明授权
    Detection of stations for wireless communication 有权
    无线通信站检测

    公开(公告)号：US08248978B2

    公开(公告)日：2012-08-21

    申请号：US11536193

    申请日：2006-09-28

    Applicant: Xiandong Zhang ,  Mark S. Wallace ,  J. Rodney Walton

    Inventor： Xiandong Zhang ,  Mark S. Wallace ,  J. Rodney Walton

    IPC: G08C17/00

    CPC classification number: H04W8/005 ,  H04W52/0216 ,  H04W84/12 ,  H04W84/18 ,  Y02D70/142 ,  Y02D70/22 ,  Y02D70/24 ,  Y02D70/25

    Abstract: Techniques for detecting other stations in a power efficient manner are described. A station may operate in a passive mode or a search mode. In the passive mode, the station receives for one receive period in each time interval. In the search mode, the station transmits for a series of transmit periods in one time interval, then receives for one receive period in the next time interval, and repeats the transmit/receive cycle. In an example scenario, station A operates in the search mode and sends a series of transmissions during its transmit periods. Station B operates in the passive mode, receives a transmission from station A during its receive period, switches to the search mode, and sends a series of transmissions for one time interval. Station A receives a transmission from station B during its receive period. After detecting one another, stations A and B may perform synchronization.

    Abstract translation: 描述了以功率有效的方式检测其他站的技术。 站可以在被动模式或搜索模式下操作。 在被动模式下，站在每个时间间隔内接收一个接收周期。 在搜索模式下，站在一个时间间隔内发送一系列发送周期，然后在下一个时间间隔内接收一个接收周期，并重复发送/接收周期。 在示例情况下，站A在搜索模式下操作并且在其发送周期期间发送一系列传输。 站B以被动模式操作，在其接收周期期间从站A接收传输，切换到搜索模式，并发送一系列传输一段时间。 站A在其接收期间接收来自站B的传输。 在彼此检测到之后，站A和B可以执行同步。

    Transmit diversity and spatial spreading for an OFDM-based multi-antenna communication system
    8.
    发明授权
    Transmit diversity and spatial spreading for an OFDM-based multi-antenna communication system 有权
    基于OFDM的多天线通信系统的发射分集和空间扩展

    公开(公告)号：US08169889B2

    公开(公告)日：2012-05-01

    申请号：US10794918

    申请日：2004-03-05

    Applicant: J. Rodney Walton ,  John W. Ketchum ,  Mark S. Wallace ,  Steven J. Howard ,  Sanjiv Nanda

    Inventor： J. Rodney Walton ,  John W. Ketchum ,  Mark S. Wallace ,  Steven J. Howard ,  Sanjiv Nanda

    IPC: H04J11/00

    CPC classification number: H04B7/0615 ,  H04B7/0413 ,  H04L27/2602

    Abstract: A multi-antenna transmitting entity transmits data to a single- or multi-antenna receiving entity using (1) a steered mode to direct the data transmission toward the receiving entity or (2) a pseudo-random transmit steering (PRTS) mode to randomize the effective channels observed by the data transmission across the subbands. The PRTS mode may be used to achieve transmit diversity or spatial spreading. For transmit diversity, the transmitting entity uses different pseudo-random steering vectors across the subbands but the same steering vector across a packet for each subband. The receiving entity does not need to have knowledge of the pseudo-random steering vectors or perform any special processing. For spatial spreading, the transmitting entity uses different pseudo-random steering vectors across the subbands and different steering vectors across the packet for each subband. Only the transmitting and receiving entities know the steering vectors used for data transmission.

    Abstract translation: 多天线发射实体使用（1）向接收实体指导数据传输的导向模式或（2）伪随机发射转向（PRTS）模式来将数据发送到单天线或多天线接收实体，以随机化 通过子带上的数据传输观察到的有效信道。 PRTS模式可以用于实现发射分集或空间扩展。 对于发射分集，发射实体在子带上使用不同的伪随机导引向量，但是在每个子带的分组上使用相同的导向向量。 接收实体不需要具有伪随机导引向量的知识或执行任何特殊处理。 对于空间扩展，发射实体在子带上使用不同的伪随机导引向量，并且跨每个子带的分组使用不同的导向矢量。 只有发送和接收实体知道用于数据传输的导向向量。

    MODE AND RATE CONTROL FOR MIMO TRANSMISSION
    10.
    发明申请
    MODE AND RATE CONTROL FOR MIMO TRANSMISSION 有权
    MIMO传输的模式和速率控制

    公开(公告)号：US20120033618A1

    公开(公告)日：2012-02-09

    申请号：US13277444

    申请日：2011-10-20

    Applicant: Mark S. Wallace ,  J. Rodney Walton

    Inventor： Mark S. Wallace ,  J. Rodney Walton

    IPC: H04W4/00

    CPC classification number: H04B7/043 ,  H04L1/0002 ,  H04L5/0007 ,  H04L25/0224

    Abstract: Techniques for performing mode and rate control for a MIMO transmission are described. For mode selection, the use of an eigensteering mode is permitted if a first set of at least one criterion is satisfied. The eigensteering mode is selected for data transmission if a second set of at least one criterion is satisfied, and an unsteered mode is selected otherwise. For rate selection, SNR estimates are derived for data streams to potentially transmit, e.g., based on channel estimates and/or data symbol estimates. The number of data streams to transmit as well as at least one rate for at least one data stream to transmit are selected based on the SNR estimates and at least one backoff factor. The backoff factor(s) are adjusted based on status of received packets. The at least one rate may be adjusted based on the age of rate information. Other aspects, features, and embodiments are also claimed and described.

    Abstract translation: 描述了用于执行MIMO传输的模式和速率控制的技术。 对于模式选择，如果满足至少一个标准的第一组，则允许使用本征转向模式。 如果满足至少一个标准的第二组，则选择本征转向模式用于数据传输，否则选择非导向模式。 对于速率选择，导出用于例如基于信道估计和/或数据符号估计可能传输的数据流的SNR估计。 基于SNR估计和至少一个退避因子来选择要发送的数据流的数量以及用于要发送的至少一个数据流的至少一个速率。 基于接收到的分组的状态来调整退避因子。 可以基于速率信息的年龄来调整至少一个速率。 还要求和描述其它方面，特征和实施例。

Patent Agency Ranking