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公开(公告)号：CA2741485A1
公开(公告)日：2005-12-22
申请号：CA2741485
申请日：2005-06-03
Applicant: QUALCOMM INC
Inventor： AGRAWAL AVNEESH , MALLADI DURGA P , STAMOULIS ANASTASIOS , MANTRAVADI ASHOK , MURALI RAMASWAMY
IPC: H04L12/56 , H04B1/707 , H04J11/00 , H04L1/00 , H04L5/02 , H04L27/26 , H04W80/00 , H04W88/10 , H04W92/10
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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52.发明专利
公开(公告)号：CA2569455A1
公开(公告)日：2005-12-22
申请号：CA2569455
申请日：2005-06-03
Applicant: QUALCOMM INC
Inventor： MALLADI DURGA P , MURALI RAMASWAMY , AGRAWAL AVNEESH , STAMOULIS ANASTASIOS , MANTRAVADI ASHOK
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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53.发明专利
公开(公告)号：AR046197A1
公开(公告)日：2005-11-30
申请号：ARP040103882
申请日：2004-10-25
Applicant: QUALCOMM INC
Inventor： VIJAYAN RAJIV , WALKER KENT G , LANE RICHARD D , MURALI RAMASWAMY
Abstract: Técnicas para transmitir información de encabezamiento con el fin de facilitar una eficiente recepción de las corrientes de datos individuales. Una estación de base puede transmitir corrientes de datos múltiples en múltiples canales de datos (o MLC). Los MLC se pueden transmitir en tiempos diferentes y en sub-bandas de frecuencia diferentes. La ubicación de tiempo-frecuencia de cada MLC puede cambiar en el transcurso del tiempo. La información de encabezamiento indica la ubicación de tiempo-frecuencia de cada MLC y se puede enviar como información de encabezamiento "compuesta" y "encapsulada". La información de encabezamiento compuesta indica las ubicaciones de tiempo-frecuencia de todos los MLC y se envían periódicamente en cada súper-trama. Un dispositivo inalámbrico recibe la información de encabezamiento compuesta, determina la ubicación de tiempo-frecuencia de cada MLC de interés, y recibe cada MLC en la ubicación de tiempo-frecuencia indicada. La información de encabezamiento encapsulado para cada MLC indica la ubicación de tiempo-frecuencia para ese MLC en la próxima súper-trama y se transmite con la carga de pago del MLC en la súper-trama actual.
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公开(公告)号：AR046196A1
公开(公告)日：2005-11-30
申请号：ARP040103881
申请日：2004-10-25
Applicant: QUALCOMM INC
Inventor： VIJAYAN RAJIV , WALKER KENT G , KRISHNAMOORTHI RAGHURAMAN , MURALI RAMASWAMY
Abstract: Técnicas para multiplexar múltiples corrientes de datos utilizando multiplexado por división de frecuencia (FDM) en un sistema OFDM. Se forman "entrelazados" M desunidos con sub-bandas U utilizables. Cada entrelazado es un conjunto diferente de sub- bandas S, donde U = M.S. Las sub-bandas para cada entrelazado están entrelazadas con las sub-bandas para cada uno de los otros entrelazados M-1. Las ranuras de M pueden ser definidos para cada período de símbolos y asignados índices de ranura 1 a M. Los índices de ranura pueden ser mapeados a los entrelazados tal que (1) se logra la diversidad de frecuencia para cada índice de ranura y (2) los entrelazados utilizados para la transmisión de piloto tienen distancias variables a los entrelazados utilizados para cada índice de ranura, lo cual mejora la ejecución de la estimación del canal. Cada corriente de datos puede ser procesada como paquetes de datos de un tamano fijo, y los números de ranuras diferentes pueden ser utilizados para cada paquete de datos dependiendo del esquema de codificación y modulación utilizado para el paquete de datos.
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公开(公告)号：CA2543415A1
公开(公告)日：2005-05-12
申请号：CA2543415
申请日：2004-10-22
Applicant: QUALCOMM INC
Inventor： WALKER KENT G , MANTRAVADI ASHOK , MURALI RAMASWAMY , LING FUYUN , SUBRAMANIAM ANAND D , VIJAYAN RAJIV
Abstract: A method of broadcasting data in a wireless broadcast network, comprising multiplexing data for a wide-area transmission onto a first transmission span, the wide-area transmission being sent from a plurality of transmitters in the network; multiplexing data for a local transmission onto a second transmission span, wherein the multiplexing is onto frequency subbands pseudo-randomly selected from among all usable frequency subbands and the local transmission being sent from a subset of the plurality of transmitters; selecting the first and second transmission spans based on an amount of data to broadcast for the wide-area transmission and an amount of data to broadcast for the local transmission; and broadcasting the local and wide-area transmissions via a wireless link, wherein the data for the wide-area transmission and the data for the local transmission are time division multiplexed (TDM) at each base station, and wherein the first and second transmission spans are first and second time segments, respectively, of a frame of a predetermined time duration as well as a corresponding system.
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Patent Agency Ranking
公开(公告)号：PL1751906T3
公开(公告)日：2021-04-19
申请号：PL05756553
申请日：2005-06-03
Applicant: QUALCOMM INC
Inventor： AGRAWAL AVNEESH , MALLADI DURGA P , STAMOULIS ANASTASIOS , MANTRAVADI ASHOK , MURALI RAMASWAMY
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公开(公告)号：MY176973A
公开(公告)日：2020-08-28
申请号：MYPI20052547
申请日：2005-06-03
Applicant: QUALCOMM INC
Inventor： MURALI RAMASWAMY , AGRAWAL AVNEESH , MALLADI DURGA P , STAMOULIS ANASTASIOS , MANTRAVADI ASHOK
Abstract: Techniques for transmitting data in a wireless communication system (100) are described. Physical channels to be sent in a super-frame are identified and allocated time slots in the super-frame. The coding and modulation for each physical channel are selected based on its capacity. The data for each physical channel is selectively encoded based on an outer code rate, e.g., for a Reed-Solomon code, and further encoded based on an inner code rate, e.g., for a Turbo code. The encoded data for each physical channel is mapped to modulation symbols based on a selected modulation scheme. The modulation symbols for each physical channel are further processed (e.g., OFDM modulated) and multiplexed onto the time slots allocated to the physical channel. Data to be sent using another radio technology (e.g., W-CDMA) is also processed and multiplexed onto time slots allocated for this radio technology.
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公开(公告)号：CA2569457C
公开(公告)日：2012-07-31
申请号：CA2569457
申请日：2005-06-03
Applicant: QUALCOMM INC
Inventor： AGRAWAL AVNEESH , MALLADI DURGA P , STAMOULIS ANASTASIOS , MANTRAVADI ASHOK , MURALI RAMASWAMY
Abstract: To transmit data in a manner to mitigate the deleterious effects of delay spread, the expected coverage areas for multiple transmissions to be sent in multiple time slots are initially determined. Cyclic prefix lengths for these transmissions are selected based on the expected coverage areas. The cyclic prefix length for each transmission may be selected from among a set of allowed cyclic prefix lengths based on the expected coverage area for that transmission, the pilot staggering used for the transmission, and so on. For example, a shorter cyclic prefix length may be selected for each local transmission, and a longer cyclic prefix length may be selected for each wide-area transmission. The selected cyclic prefix lengths may be signaled to the terminals. The transmissions are processed (e.g., OFDM modulated) based on the selected cyclic prefix lengths. The cyclic prefix lengths may be selected periodically, e.g., in each super-frame.
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公开(公告)号：HK1104719A1
公开(公告)日：2008-01-18
申请号：HK07112853
申请日：2007-11-26
Applicant: QUALCOMM INC
Inventor： VIJAYAN RAJIV , WALKER KENT G , LANE RICHARD D , MURALI RAMASWAMY
IPC: H04B20100101 , H04L20100101 , H04W4/06 , H04W52/02
Abstract: Techniques for transmitting overhead information to facilitate efficient reception of individual data streams are described. A base station may transmit multiple data streams on multiple data channels (or MLCs). The MLCs may be transmitted at different times and on different frequency subbands. The time-frequency location of each MLC may change over time. The overhead information indicates the time-frequency location of each MLC and may be sent as "composite" and "embedded" overhead information. The composite overhead information indicates the time-frequency locations of all MLCs and is sent periodically in each super-frame. A wireless device receives the composite overhead information, determines the time-frequency location of each MLC of interest, and receives each MLC at the indicated time-frequency location. The embedded overhead information for each MLC indicates the time-frequency location of that MLC in the next super-frame and is transmitted along with the payload of the MLC in the current super-frame.
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公开(公告)号：BRPI0511735A
公开(公告)日：2008-01-08
申请号：BRPI0511735
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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