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101 records (took 0.021 seconds)

    31.
    发明专利
    未知

    公开(公告)号：AT516641T

    公开(公告)日：2011-07-15

    申请号：AT07760625

    申请日：2007-04-13

    Applicant: QUALCOMM INC

    Inventor： NANDAGOPALAN SAI ,  ABRAHAM SANTOSH

    IPC: H04L12/40

    Abstract: Systems and methodologies are described that facilitate communication in a wireless network environment. In particular, access points can dynamically adjust transmit power and/or carrier-sensing thresholds to allow multiple access points to communicate concurrently. In aspects, access points exchange node information, including RSSI and node addresses, of nearby nodes. The node information can be utilized to detect hidden nodes and estimate interference levels. Transmit power and/or carrier-sensing thresholds can be modified as a function of distance between source and destination access points, interference from hidden nodes, transmission rates, and/or path loss.

    33.
    发明专利
    未知

    公开(公告)号：AT489822T

    公开(公告)日：2010-12-15

    申请号：AT07762104

    申请日：2007-05-10

    Applicant: QUALCOMM INC

    Inventor： NANDAGOPALAN SAISHANKAR ,  ABRAHAM SANTOSH ,  NANDA SANJIV

    IPC: H04W40/02 ,  H04L45/122

    Abstract: An apparatus includes a processing system configured to establish a link with any one of a plurality of access points in a mesh network, each of the access points providing the apparatus with a different data path through the mesh network. The processing system is further configured to compute a metric for each of the data paths and select one of the access points to establish the link with based on the metrics. In a centralized mesh network, an apparatus includes a processing system configured to compute, for each of the access points, a metric for each of a plurality of data paths supportable by that access point, and establish interconnections between the access points based on the metrics.

    34.
    发明专利
    未知

    公开(公告)号：AT438245T

    公开(公告)日：2009-08-15

    申请号：AT05754557

    申请日：2005-05-27

    Applicant: QUALCOMM INC

    Inventor： MEYLAN ARNAUD ,  ABRAHAM SANTOSH

    IPC: H04L12/56 ,  H04L12/28 ,  H04W28/04 ,  H04W72/04 ,  H04W72/12 ,  H04W80/00

    Abstract: Techniques for scheduling flows and links for transmission are described. Each link is an oriented source-destination pair and carries one or more flows. Each flow may be associated with throughput, delay, feedback (e.g., acknowledgments (ACKs)) and/or other requirements. A serving interval is determined for each flow based on the requirements for the flow. A serving interval is determined for each link based on the serving intervals for all of the flows sent on the link. Each link is scheduled for transmission at least once in each serving interval, if system resources are available, to ensure that the requirements for all flows sent on the link are met. The links are also scheduled in a manner to facilitate closed loop rate control. The links are further scheduled such that ACKs for one or more layers in a protocol stack are sent at sufficiently fast rates.

    Transmission mode and rate selection for a wireless communication system
    35.
    发明专利
    Transmission mode and rate selection for a wireless communication system 未知

    公开(公告)号：AU2005257811B2

    公开(公告)日：2009-01-08

    申请号：AU2005257811

    申请日：2005-05-05

    Applicant: QUALCOMM INC

    Inventor： WALTON JAY RODNEY ,  ABRAHAM SANTOSH ,  MEYLAN ARNAUD

    IPC: H04B7/04 ,  H04J99/00 ,  H04B7/00 ,  H04B7/06 ,  H04L1/00 ,  H04L25/02

    Abstract: A method of selecting a transmission mode for data transmission in a wireless communication system is described. The method comprising determining the age of channel information available for use to transmit data via a wireless channel, comparing the age of the channel information against a threshold, and selecting a steered mode when the age of the channel information is less than or equal to the threshold and selecting an unsteered mode when the age of the channel information is greater than the threshold, and processing data in accordance with the selected transmission mode wherein the channel information is used for processing when the steered mode is selected and the channel information is not used for processing when the unsteered mode is selected. Further, a corresponding apparatus is described.

    METODO Y APARATO PARA EL CONTROL DE FLUJO DE DATOS EN UNA RED DE MALLA
    38.
    发明专利
    METODO Y APARATO PARA EL CONTROL DE FLUJO DE DATOS EN UNA RED DE MALLA 未知

    公开(公告)号：AR056131A1

    公开(公告)日：2007-09-19

    申请号：ARP060104526

    申请日：2006-10-17

    Applicant: QUALCOMM INC

    Inventor： ABRAHAM SANTOSH ,  NANDAGOPALAN SAISHANKAR ,  NANDA SANJIV

    IPC: H04L12/56

    Abstract: Los flujos admitidos a un nodo de la malla pueden ser controlados a través de los parámetros de acceso de contencion. El nodo de admision puede determinar una duracion de oportunidad de transmision deseada, y una frecuencia de oportunidad de transmision. Más aun, el nodo puede lograr la velocidad de flujo y los requerimientos de límite de retardo del flujo admitidos, sobre la base, por lo menos en parte, en la duracion de oportunidad de la transmision deseada, y la frecuencia de oportunidad de transmision. La velocidad de datos y la frecuencia de acceso del nodo admitido puede ser supervisada en el nivel de acceso físico. El requerimiento de la velocidad de flujo puede ser logrado sobre la base, por lo menos en parte, en un ajuste a la duracion de oportunidad de transmision. El requerimiento de límite de retardo puede ser logrado, por lo menos en parte, en la manipulacion de los parámetros de acceso de contencion. La duracion de oportunidad de transmision y los parámetros de acceso pueden ser determinados por los nodos de admision de corriente ascendente, los cuales pueden reducir la congestion cerca de los portales de la malla, y lograr el incremento de la transferencia de datos.

    TRANSMISSION CONTROL FOR WIRELESS COMMUNICATION NETWORKS
    39.
    发明专利
    TRANSMISSION CONTROL FOR WIRELESS COMMUNICATION NETWORKS 未知

    公开(公告)号：CA2720322A1

    公开(公告)日：2007-09-13

    申请号：CA2720322

    申请日：2007-03-05

    Applicant: QUALCOMM INC

    Inventor： ABRAHAM SANTOSH ,  NANDA SANJIV ,  NANDAGOPALAN SAISHANKAR

    IPC: H04W28/06 ,  H04W24/10 ,  H04W84/00

    Abstract: Techniques for controlling transmissions in wireless communication networks are described. In one aspect, transmission control for a mesh network may be achieved by ranking mesh points or stations in the mesh network. In one design, the rank of a first station in the mesh network may be determined. At least one station of lower rank than the first station in the mesh network may be identified. At least one transmission parameter for the at least one station of lower rank may be set by the first station. In another aspect, stations may be assigned different transmission parameter values to achieve the data requirements of each station. At least one transmission parameter value may be selected for each station based on the rank, QoS requirements, amount of traffic, and/or achievable data rate for that station and may be sent (e.g., via a probe response message) to the station.

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