公开(公告)号：CA2799975A1

公开(公告)日：2009-05-07

申请号：CA2799975

申请日：2008-10-29

Applicant: QUALCOMM INC

Inventor： MALLADI DURGA PRASAD ,  MONTOJO JUAN ,  SARKAR SANDIP

IPC: H04W28/06 ,  H04W72/04

Abstract: Various methods and systems for efficiently performing the blind decoding of downlink signals are described. Several forms of arranging possible CCE combinations are examined and investigated. Based on PDCCH size estimation/information, CCE concatenations that are most likely (of limited sets) can be arrived at. Tree-based concatenations are also devised using largest CCE ordering to align smaller CCE sizes to similar boundaries. By such ordering, the search space for all possible CCE ordering and sizes can be reduced to an efficient tree. Set mapping between possible CCE/REs are also described using a first set to secondary and tertiary sets. Various other o'rdering and sorting schemes are also detailed that enable a blind decode of a PDCCH channel to be efficiently performed.

公开(公告)号：CA2813506A1

公开(公告)日：2009-02-19

申请号：CA2813506

申请日：2008-08-13

Applicant: QUALCOMM INC

Inventor： MALLADI DURGA PRASAD ,  KIM BYOUNG-HOON ,  MONTOJO JUAN ,  SARKAR SANDIP

IPC: H04J13/00 ,  H04J11/00 ,  H04W28/10

Abstract: Techniques for sending control information in a wireless communication system are described. In an aspect, a UE spreads control information across frequency with a DFT and across time with an orthogonal sequence to obtain output data for the control information. In one design, the UE receives codewords fro N HARQ processes to obtain ACK information, generates output data for the ACK information, and sends the output data in one of M uplink subframes. In another aspect, first control information is processed based on a first coding and multiplexing scheme utilizing code division multiplexing in time and frequency domains. Second control information is processed based on a second coding and multiplexing scheme utilizing code division multiplexing in time domain and spreading in frequency domain.

公开(公告)号：AU2008286714A1

公开(公告)日：2009-02-19

申请号：AU2008286714

申请日：2008-08-15

Applicant: QUALCOMM INC

Inventor： MONTOJO JUAN ,  SARKAR SANDIP ,  MALLADI DURGA PRASAD ,  KIM BYOUNG-HOON

IPC: H04B7/04

Abstract: Techniques for sending traffic data and control information in a wireless communication system are described. In one design, a transmitter (e.g., a Node B or a UE) may perform beamforming to send traffic data on M layers based on a precoding matrix, where M may be one or greater. The transmitter may also perform beamforming to send control information on up to M layers based on the same precoding matrix used for the traffic data. The transmitter may send the beamformed traffic data on a first physical channel and may send the beamformed control information on a second physical channel. The transmitter may multiplex the beamformed traffic data and the beamformed control information using time division multiplexing (TDM) or frequency division multiplexing (FDM).

公开(公告)号：AT412278T

公开(公告)日：2008-11-15

申请号：AT02761494

申请日：2002-08-22

Applicant: QUALCOMM INC

Inventor： SARKAR SANDIP ,  CHEN TAO

IPC: H04B7/005 ,  H04J13/00 ,  H04B1/04 ,  H04B7/26

公开(公告)号：CA2673873A1

公开(公告)日：2008-07-17

申请号：CA2673873

申请日：2008-01-04

Applicant: QUALCOMM INC

Inventor： KHANDEKAR AAMOD ,  GOROKHOV ALEXEI ,  BHUSHAN NAGA ,  SARKAR SANDIP ,  PALANKI RAVI

IPC: H04W28/16 ,  H04W52/14 ,  H04W52/16 ,  H04W52/24 ,  H04W52/36 ,  H04W52/60 ,  H04W72/08

Abstract: Techniques for sending control information in a wireless communication sy stem are described. A control segment may include tiles, and each tile may i nclude a number of transmission units. A number of control resources may be defined and mapped to the transmission units for the control segment. For sy mmetric mapping, multiple sets of control resources may be formed, and each batch of L consecutive sets of S control resources may be mapped to S transm ission units at the same location in the L tiles. For localized mapping, eac h set of S control resources may be mapped to a cluster of S adjacent transm ission units in one tile. For distributed mapping, each control resource may be mapped to one transmission unit in one tile. For diversity, each control resource may be mapped to multiple (e.g., three) transmission units in at l east one tile.

公开(公告)号：NO325773B1

公开(公告)日：2008-07-14

申请号：NO20020426

申请日：2002-01-28

Applicant: QUALCOMM INC

Inventor： TIEDEMANN JR EDWARD G ,  SARKAR SANDIP ,  SAIFUDDIN AHMED

IPC: H04B7/005 ,  H04B7/26

Abstract: Controlling transmission energy in a variable rate communication system that gates out portions of a frame in a predetermined and predicable fashion. In particular, the present invention describes a method and apparatus which identifies closed loop power control commands that have been generated erroneously based on portions of a frame that have been gated. The identified power control commands are ignored. In an alternative embodiment, if identification of the erroneous power control commands occurs after response measures have been taken, the transmitting station responds by setting the transmission energy back to the state it would have been in had the erroneous power control commands been identified prior to the response.

公开(公告)号：DE602004009088T2

公开(公告)日：2008-06-19

申请号：DE602004009088

申请日：2004-08-04

Applicant: QUALCOMM INC

Inventor： WEI YONGBIN ,  TIEDEMANN EDWARD G JR ,  GAAL PETER ,  MALLADI DURGA P ,  PUIG OSES DAVID ,  SARKAR SANDIP ,  LUNDBY STEIN A ,  CHEN TAO ,  JAIN AVINASH ,  DAMNJANOVIC ALEKSANDAR ,  WILLENEGGER SERGE D

IPC: H04B7/26 ,  H04L1/00 ,  H04L1/16 ,  H04L1/18 ,  H04L12/56 ,  H04W28/04 ,  H04W28/22 ,  H04W72/14

Abstract: Embodiments disclosed herein address the need in the art for an extended acknowledgment/rate control channel. In one aspect, an acknowledgment command and a rate control command are combined to form a combined command. In another aspect, the combined command is generated in accordance with a constellation of points, each point corresponding to a pair consisting of a rate control command and an acknowledgment command. In yet another aspect, the points of the constellation are designed to provide the desired probability of error for the respective command pairs. In yet another aspect, a common rate control command is transmitted along with a combined or dedicated rate control command. Various other aspects are also presented. These aspects have the benefit of reduced overhead while providing acknowledgment and rate control to single remote stations and/or groups of remote stations.

公开(公告)号：CA2883477A1

公开(公告)日：2008-05-02

申请号：CA2883477

申请日：2007-10-26

Applicant: QUALCOMM INC

Inventor： PRAKASH RAJAT ,  SARKAR SANDIP

IPC: H04B7/02

Abstract: Methods and apparatus are disclosed for generating and exchanging codebooks in a multiple access wireless communication system, such as Space Division Multiple Access (SDMA). The codebooks include a plurality of preferred precoding matrices. The codebooks are generated at an access network. Generating a codebook may further include generating a codebook identifier assigned by the access network. The codebooks are communicated to access terminals. Communicating the codebooks may further include querying the access terminals to determine an identity of codebooks currently stored at each access terminal, receiving a codebook status response from each of the access terminals indicating the identity of codebooks stored at each of the access terminals. The codebooks may also be assigned to access terminals for a predetermined sector in the active set of communication links. Generating a codebook may further include generating a codebook that includes identification of clusters. The clusters identify a set of the precoding matrices and, as such, a set of beams in the cluster. Thus, the clusters may identify a starting beam index and an ending beam index. The codebook may further include an overlap cluster map that indicates clusters authorized to potentially overlap.

公开(公告)号：AU2007308796A1

公开(公告)日：2008-05-02

申请号：AU2007308796

申请日：2007-10-26

Applicant: QUALCOMM INC

Inventor： SARKAR SANDIP ,  PRAKASH RAJAT

IPC: H04L25/03 ,  H04B7/06

公开(公告)号：HK1105507A1

公开(公告)日：2008-02-15

申请号：HK07113793

申请日：2007-04-10

Applicant: QUALCOMM INC

Inventor： LUNDBY STEIN A A ,  JAIN AVINASH ,  ODENWALDER JOSEPH P P ,  SARKAR SANDIP ,  CHEN TAO ,  WEI YONGBIN

IPC: H04W20090101 ,  H04B7/005 ,  H04B7/185 ,  H04W52/14 ,  H04W52/24 ,  H04W52/26 ,  H04W52/28 ,  H04W52/36

Abstract: In accordance with an exemplary embodiment of the invention, an apparatus, system, and method efficiently manage reverse link resources by allowing a mobile station to select between transmitting a payload a standard power level and transmitting a smaller payload at a boosted power level. The mobile station, therefore, can autonomously select a QoS (Quality of Service) level for physical layer packets. Based on reverse link transmission information received from a base station, the mobile station derives a reverse link transmission guideline defining the power levels and associated payloads for at least a standard service and boosted service. The mobile station selects a reverse link transmission power level from a plurality of power levels including at least a standard reverse link transmission power level associated with a standard payload size and a boosted reverse link transmission power level associated with a boosted payload size where the standard payload size is greater than the boosted payload size.