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201.发明专利
公开(公告)号：CA2668139C
公开(公告)日：2014-06-03
申请号：CA2668139
申请日：2007-10-29
Applicant: QUALCOMM INC
Inventor： MALLADI DURGA PRASAD
Abstract: A system and method for hybrid FDM (frequency division multiplexing)-CDM (code division multiplexing) structure for single carrier control channels is provided. The hybrid FDM-CDM structure maximizes frequency diversity over the entire available bandwidth such that orthogonality between signals from users in a given cell is maintained. Thus, users in the given cell can transmit over a non-contiguous set of tones. Furthermore, the hybrid FDM-CDM structure maintains orthogonality of a pilot of users in different cells based on a despreading operation in the time domain.
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公开(公告)号：CA2667296C
公开(公告)日：2014-06-03
申请号：CA2667296
申请日：2007-10-31
Applicant: QUALCOMM INC
Inventor： DAMNJANOVIC ALEKSANDAR , MALLADI DURGA PRASAD , MONTOJO JUAN
IPC: H04W76/02
Abstract: Techniques for sending messages for system access are described. In one aspect, a user equipment (UE) sends a first message with power headroom and/or buffer size information for system access. A Node B determines at least one parameter (e.g., a resource grant, power control information, etc.) based on the power headroom and/or buffer size information. The Node B sends a second message with the parameter(s). The UE sends a third message based on the parameter(s), e.g., with uplink resources indicated by the resource grant, with transmit power determined based on the power control information, etc. In another aspect, the UE sends a radio environment report in the third message. The report may be used to select a cell and/or a frequency for the UE. In yet another aspect, the second message includes power control information, and the UE sends the third message based on the power control information.
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公开(公告)号：CA2655865C
公开(公告)日：2014-05-20
申请号：CA2655865
申请日：2007-07-10
Applicant: QUALCOMM INC
Inventor： MALLADI DURGA PRASAD , KIM BYOUNG-HOON
IPC: H04B7/26
Abstract: Facilitating frequency hopping for single carrier, frequency division multiple access (SC-FDMA) transmission is described herein. By way of example, user data transmitted within a transmission allocation unit can be frequency shifted with respect to time based slots of the allocation unit. As a result, frequency hopping can be accomplished while preserving single carrier constraints and a low peak to average power ratio (PAPR). Furthermore, various frequency shifted mechanisms are disclosed to accomplish preservation of single carrier restraints. For example, a scheduler can select between cyclic frequency shifting, transposed frequency shifting, and multiplexing of frequency selective scheduled and frequency hopped data based on an audit of scheduled data for the transmission allocation unit. As a result, the reduction in interference achieved through frequency hopping can be combined with the low PAPR for various data allocation configurations.
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公开(公告)号：BRPI0807110A2
公开(公告)日：2014-05-06
申请号：BRPI0807110
申请日：2008-02-08
Applicant: QUALCOMM INC
Inventor： CHEN WANSHI , MALLADI DURGA PRASAD
IPC: H04W72/08
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公开(公告)号：CA2733276C
公开(公告)日：2014-04-22
申请号：CA2733276
申请日：2007-04-27
Applicant: QUALCOMM INC
Inventor： MONTOJO JUAN , MALLADI DURGA PRASAD
Abstract: Techniques for paging user equipments (UEs) in a wireless communication system are described. In one aspect, a cell sends a paging indicator to a UE, monitors for an acknowledgement from the UE, and sends a page message to the UE if an acknowledgement is received from the UE. The cell may receive channel quality information from the UE and may send the page message with link adaptation and/or HARQ to improve performance. In another aspect, a cell sends a paging indicator on a shared control channel to a UE and sends a page message on a shared data channel to the UE. The paging indicator and page message may be sent from multiple cells to the UE. Alternatively, the paging indicator may be sent from multiple cells to the UE, and the page message may be sent from a single cell to the UE.
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Patent Agency Ranking
公开(公告)号：CA2733157C
公开(公告)日：2014-04-22
申请号：CA2733157
申请日：2007-04-27
Applicant: QUALCOMM INC
Inventor： MONTOJO JUAN , MALLADI DURGA PRASAD
Abstract: Techniques for paging user equipments (UEs) in a wireless communication system are described. In one aspect, a cell sends a paging indicator to a UE, monitors for an acknowledgement from the UE, and sends a page message to the UE if an acknowledgement is received from the UE. The cell may receive channel quality information from the UE and may send the page message with link adaptation and/or HARQ to improve performance. In another aspect, a cell sends a paging indicator on a shared control channel to a UE and sends a page message on a shared data channel to the UE. The paging indicator and page message may be sent from multiple cells to the UE. Alternatively, the paging indicator may be sent from multiple cells to the UE, and the page message may be sent from a single cell to the UE.
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公开(公告)号：BRPI0806992A2
公开(公告)日：2014-04-08
申请号：BRPI0806992
申请日：2008-02-06
Applicant: QUALCOMM INC
Inventor： CHEN WANSHI , MALLADI DURGA PRASAD
IPC: H04L5/02 , H04B1/713 , H04B1/7143 , H04B7/12 , H04B7/26
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公开(公告)号：RU2507699C2
公开(公告)日：2014-02-20
申请号：RU2009131564
申请日：2004-01-07
Applicant: QUALCOMM INC
Inventor： SMI DZHON E , UOLTON DZHEJ RODNI , MALLADI DURGA PRASAD
Abstract: Изобретениеотноситсяк схемампередачипилот-сигналов, подходящимдляиспользованияв системахрадиосвязис передачейнанесколькихнесущих (например, OFDM). Техническийрезультатсостоитв эффективноститехнологиидлясхемпередачипилот-сигналовдлясистемсвязис передачейнанесколькихнесущих. Дляэтогов указанныхсхемахпередачипилот-сигналовдлядостиженияортогональностимеждупилот-сигналами, передаваемыминесколькимибазовымистанциямипонисходящейлиниисвязи, можетиспользоватьсяортогональностьпочастоте, повремениилипочастотеи повремени. Ортогональностьпочастотедостигаетсяприпередачепилот-сигналовв непересекающихсянаборахподдиапазонов. Ортогональностьповременидостигаетсяприпередачепилот-сигналовс использованиемразличныхортогональныхкодов (например, кодовУолша). Пилот-сигналытакжеможноскремблироватьразличнымикодамискремблирования, которыеиспользуютдлярандомизациипомехпилот-сигналови дляобеспечениявозможностиидентификациипередатчиковуказанныхпилот-сигналов. Дляповышенияэффективностиможетбытьвыполненоподавлениепомехпилот-сигналов, таккакподдиапазоны, используемыедляпередачиданныходнимпередатчиком, могутбытьиспользованытакжедляпередачипилот-сигналовдругимпередатчиком. Помехипилот-сигналовоцениваютсяи затемвычитаютсяизпринятыхсимволовдляполучениясимволовс подавленнымпилот-сигналом, имеющихлучшеекачество. 16 н. и 35 з.п. ф-лы, 4 табл. , 17 ил.
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公开(公告)号：BRPI0718363A2
公开(公告)日：2014-02-04
申请号：BRPI0718363
申请日：2007-10-30
Applicant: QUALCOMM INC
Inventor： XU HAO , MALLADI DURGA PRASAD
Abstract: Systems and methods facilitate pilot signal design, power control, data rate determination, and channel assignment in the reverse link of a wireless communication system for dynamic scheduling and joint operation in SIMO, SU-MIMO, and MU-MIMO. Pilot signal is based on periodic transmissions of multiple sounding reference sequences for channel estimation. Power control is based on a reference signal at a predetermined power spectral density (PSD) level, and on an offset PSD determined and signaled based on an antenna that transmits the reference signal, other cell interference, and power amplifier headroom. PSD levels for SIMO/MIMO data transmissions are determined based on channel estimates and the predetermined PSD and offset PSD. Such data PSD levels are employed to generate data rates, and to dynamically schedule data streams for communication. Communication resources are conveyed through a channel assignment with an overhead that depends on the maximum multiplexing order of the estimated channel.
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210.发明专利
公开(公告)号：AU2013273853A1
公开(公告)日：2014-01-16
申请号：AU2013273853
申请日：2013-12-23
Applicant: QUALCOMM INC
Inventor： HOU JILEI , SMEE JOHN EDWARD , MALLADI DURGA PRASAD , HASSANPOURGHADY NAVID , MALLIK SIDDHARTHA
Abstract: Techniques for supporting distributed multiple-input multiple-output (MIMO) transmissions are described. In one design, a user equipment (UE) determines channel estimates for multiple cells and reports the channel estimates. The UE thereafter receives a data transmission sent by the multiple cells to the UE based on the channel estimates. The data transmission may include at least one data stream, and each data stream may be sent by one cell or the multiple cells to the UE. In another design, a UE determines first and second channel estimates for first and second cells, respectively, and reports the channel estimates. The UE then receives a first data transmission sent by the first cell to the UE based on the first channel estimate. The UE also receives a second data transmission sent by the second cell to another UE and steered away from the UE based on the second channel estimate. C: U))
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