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公开(公告)号：MX2007015751A
公开(公告)日：2008-02-19
申请号：MX2007015751
申请日：2006-06-16
Applicant: QUALCOMM INC
Inventor： AGRAWAL AVNEESH , TEAGUE EDWARD HARRISON , JULIAN DAVID JONATHAN
Abstract: Se describen tecnicas para seleccionar una estacion base en servicio de enlace inverso (RL) para una terminal; la termina envia una transmision en el enlace inverso a multiples estaciones base en un sistema de comunicacion inalambrica; la transmision puede ser para senalizacion enviada en un canal de control; la terminal recibe retroalimentacion (por ejemplo, comandos de control de potencia (PC) y/O indicadores de borrado) desde las multiples estaciones base; cada estacion base puede generar retroalimentacion con base en el canal de control y/O alguna otra transmision recibida desde la terminal; la terminal ejecuta control de potencia de enlace inverso y ademas selecciona una estacion base en servicio RL con base en la retroalimentacion recibida; por ejemplo, la terminal puede seleccionar la estacion base con el nivel de potencia de transmision mas bajo, el porcentaje mas grande de comandos de apagado, o la velocidad de borrado mas baja como la estacion base en servicio RL.
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公开(公告)号：MX2007015007A
公开(公告)日：2008-02-15
申请号：MX2007015007
申请日：2006-05-31
Applicant: QUALCOMM INC
Inventor： AGRAWAL AVNEESH , KHANDEKAR AAMOD , GOROKHOV ALEXEI
IPC: H04Q7/38
Abstract: Se provee un metodo, aparato y estructura de canal para reconocer mensajes de asignacion; el metodo y aparato permiten la senalizacion eficiente con base en los recursos.
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公开(公告)号：BRPI0512128A
公开(公告)日：2008-02-06
申请号：BRPI0512128
申请日：2005-04-29
Applicant: QUALCOMM INC
Inventor： HORN GAVIN BERNARD , AGRAWAL AVNEESH , GILLIES DONALD WILLIAM , JAIN NIKHIL , CHAKRAVARTY SUMANTRA
Abstract: A forward link (FL) RLP and a reverse link (RL) RLP that are different in design are used for data transmission on the forward and reverse links, respectively. The asymmetric RLP designs may be quantified by, e.g., different feedback mechanisms and/or different data transmission mechanisms used for these RLPs. The FL RLP may utilize a negative acknowledgment (NAK)-based feedback mechanism whereas the RL RLP may utilize an acknowledgment (ACK)-based feedback mechanism. The NAK-based FL RLP may transmit each RLP frame once in sequential order and retransmit RLP frames out of sequence when not received correctly. The ACK-based RL RLP may transmit RLP frames in sequential order, one frame at a time until the frame is received correctly or the maximum number of transmissions have been attempted. Timers with adaptive values computed based on actual traffic conditions may be used to facilitate data transmission by the NAK-based FL RLP.
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公开(公告)号：HK1104703A1
公开(公告)日：2008-01-18
申请号：HK07112833
申请日：2007-11-26
Applicant: QUALCOMM INC
Inventor： SUTIVONG ARAK , AGRAWAL AVNEESH
IPC: H04L20060101 , H04J13/06 , H04J99/00 , H04L5/02
Abstract: For quasi-orthogonal multiplexing in an OFDMA system, multiple (M) sets of traffic channels are defined for each base station. The traffic channels in each set are orthogonal to one another and may be pseudorandom with respect to the traffic channels in each of the other sets. The minimum number of sets of traffic channels (L) is used to support a given number of (U) terminals selected for data transmission, where and . Each terminal transmits data and pilot symbols on its traffic channel. A base station receives data transmissions from all terminals and may perform receiver spatial processing on received symbols with spatial filter matrices to obtain detected data symbols. The spatial filter matrix for each subband may be derived based on channel response estimates for all terminals transmitting on that subband.
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公开(公告)号：BRPI0511869A
公开(公告)日：2008-01-15
申请号：BRPI0511869
申请日：2005-06-08
Applicant: QUALCOMM INC
Inventor： AGRAWAL AVNEESH , TEAGUE EDWARD HARRISON , JI TINGFANG
Abstract: For soft handoff on the reverse link with restrictive reuse, a wireless terminal searches for pilots transmitted by sectors in a wireless system, measures the detected pilots, selects a serving sector (e.g., the strongest received sector), and identifies non-serving sectors that may receive high interference from the terminal. The serving sector assigns the terminal with subband(s) that are usable by the serving sector and unusable by the non-serving sectors. The terminal transmits data symbols on the assigned subbands to the serving and non-serving sectors. These sectors process the reverse link transmission from the terminal and obtain soft-decision symbols, which are estimates of the transmitted data symbols. The soft-decision symbols from co-located sectors may be combined and then decoded to obtain decoded packets. The sectors may also independently decode the soft-decision symbols, and the decoded packets from these sectors may be combined to obtain final decoded packets for the terminal.
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Patent Agency Ranking
公开(公告)号：NO20076194L
公开(公告)日：2008-01-14
申请号：NO20076194
申请日：2007-11-30
Applicant: QUALCOMM INC
Inventor： TEAGUE EDWARD HARRISON , AGRAWAL AVNEESH , JULIAN DAVID JONATHAN
Abstract: Systems and methods are provided to facilitate efficient communications handoff for access terminals in a wireless network. In an aspect, a method to handoff communications in a wireless network is provided. The method includes decoding assignment messages from one or more sectors in an active set and performing an access terminal handoff based at least in part on the active set.
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公开(公告)号：BRPI0511736A
公开(公告)日：2008-01-08
申请号：BRPI0511736
申请日：2005-06-03
Applicant: QUALCOMM INC
Inventor： AGRAWAL AVNEESH , MALLADI DURGA P , STAMOULIS ANASTASIOS , MANTRAVADI ASHOK , MURALI RAMASWAMY
Abstract: Frame structures and transmission techniques for a wireless communication system are described. In one frame structure, a super-frame includes multiple outer-frames, and each outer-frame includes multiple frames, and each frame includes multiple time slots. The time slots in each super-frame are allocated for downlink and uplink and for different radio technologies (e.g., W-CDMA and OFDM) based on loading. Each physical channel is allocated at least one time slot in at least one frame of each outer-frame in the super-frame. An OFDM waveform is generated for each downlink OFDM slot and multiplexed onto the slot. A W-CDMA waveform is generated for each downlink W-CDMA slot and multiplexed onto the slot. A modulated signal is generated for the multiplexed W-CDMA and OFDM waveforms and transmitted on the downlink. Each physical channel is transmitted in bursts. The slot allocation and coding and modulation for each physical channel can change for each super-frame.
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公开(公告)号：BRPI0511170A
公开(公告)日：2007-12-04
申请号：BRPI0511170
申请日：2005-04-29
Applicant: QUALCOMM INC
Inventor： NAGUIB AYMAN FAWZY , AGRAWAL AVNEESH
Abstract: Methods and apparatuses that apply a time-varying delay to symbols to be transmitted from one or more antennas are provided. In a first embodiment, first and second transmission orders for samples in first and second data symbols, respectively, are determined. First and second cyclic prefixes are appended to the beginnings of the first and second transmission orders, respectively. The first and second data symbols are then provided to the same antenna for transmissions beginning at different time slots in accordance with a delay diversity scheme. In a second embodiment, either the first data symbol or the second data symbol can be provided to different antennas for transmissions beginning at different time slots in accordance with a delay diversity scheme.
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公开(公告)号：DE69934706T2
公开(公告)日：2007-10-18
申请号：DE69934706
申请日：1999-10-12
Applicant: QUALCOMM INC
Inventor： BUTLER K , ZHANG HAITAO , TIEDEMANN G , ZOU QIUZHEN , SIH C , AGRAWAL AVNEESH
IPC: H04W24/02 , H04B1/7075 , H04B1/7077 , H04B1/7115 , H04W52/02
Abstract: A novel and improved method for performing paging is described. In one embodiment of the invention a searcher is used to detect spread spectrum signals. Samples received RF signals are stored in a sample buffer. During standby mode, the samples are gathered during paging slots assigned to the mobile. A set of searches are performed on the samples, and if pilot signals are detected additional demodulation is performed to detect paging messages. The resulting set of demodulation data may be combined to increase detection. After a page message has been detected, additional demodulation resources may be activated to processes more complete page messages, or other information channels. In one embodiment of the invention, the searcher includes a demodulator to perform quick page detection without the use of finger elements to reduce idle mode power consumption.
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公开(公告)号：CA2808221A1
公开(公告)日：2007-10-04
申请号：CA2808221
申请日：2007-01-05
Applicant: QUALCOMM INC
Inventor： BORRAN MOHAMMAD J , KHANDEKAR AAMOD , JI TINGFANG , AGRAWAL AVNEESH
Abstract: Systems and methodologies are described that facilitate mitigation of interference in a wireless communication environment. Terminals can utilize interference information provided by neighboring sectors to adjust transmit power and reduce interference. Access points can provide two sets or types of interference information. The first type can be transmitted over a large coverage area, requiring significant overhead and limiting the transmission rate. Access points can also provide a second set or type of interference information directed at smaller coverage area, such as an area proximate to the edge of the supported sector. This second type of interference information can be utilized by terminals that include the access point within their active set. The second set of interference information can be provided at a higher rate than the first set due to decreased overhead requirements. Terminals can utilize both sets of interference information to adjust transmit power.
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