公开(公告)号：CA2475515A1

公开(公告)日：2003-08-28

申请号：CA2475515

申请日：2003-02-19

Applicant: QUALCOMM INC

Inventor： MEDVEDEV IRINA ,  KETCHUM JOHN W ,  WALTON JAY R

IPC: H04J99/00 ,  H04B7/005 ,  H04B7/04 ,  H04B7/06 ,  H04L1/00 ,  H04L1/06

Abstract: Techniques for controlling the transmit power for a number of data streams i n a wireless multi-channel (e.g., MIMO) communication system. In one method, a number of received symbol streams are initially processed in accordance with a particular (e.g., CCMI, CCMI-SC, MMSE, or MMSE-SC) receiver processing technique to provide a number of detected data streams. The post-detection SNRs of the detected data streams are estimated, and each SNR that exceeds a setpoint is identified. This setpoint may correspond to (1) the SNR needed t o achieve the maximum allowed spectral efficiency or (2) the target SNR needed to achieve a specified spectral efficiency. A new (or adjusted) transmit pow er for each detected data stream associated with a post-detection SNR that exceeds the setpoint is determined and used for the data stream. Different power control schemes are provided for different classes of receiver processing techniques with different characteristics.

公开(公告)号：BR0109639A

公开(公告)日：2003-06-24

申请号：BR0109639

申请日：2001-03-20

Applicant: QUALCOMM INC

Inventor： WALTON JAY R ,  WALLACE MARK ,  HOLTZMAN JACK ,  ANTONIO FRANKLIN P

IPC: H04J1/05 ,  H04B7/005 ,  H04B7/26 ,  H04J3/00 ,  H04J11/00 ,  H04W52/24 ,  H04W52/26 ,  H04W52/34

公开(公告)号：AU2002354000A1

公开(公告)日：2003-05-19

申请号：AU2002354000

申请日：2002-10-31

Applicant: QUALCOMM INC

Inventor： KETCHUM JOHN W ,  WALLACE MARK ,  WALTON JAY R ,  HOWARD STEVEN J

IPC: H04J11/00 ,  H04L1/00 ,  H04Q7/38 ,  H04L27/26

Abstract: Techniques to adaptively control the rate of a data transmission in a wireless (e.g., OFDM) communication system. In an aspect, various types of metrics may be derived and used to select the proper rate for the data transmission. Some types of metrics relate to different characteristics of the communication channel, such as SNR, frequency selectivity, time selectivity, and so on. One type of metric relates to the performance of the data transmission. In another aspect, the various types of metrics may be used in different manners to adaptively control the rate. Some metrics may be used for open-loop control of the rate, other metrics may be used for closed-loop control, and some may be used for both. For example, the channel metrics may be used to determine or select the rate, and the performance metrics may be used to determine whether or not to adjust the rate.

公开(公告)号：NO20111586A

公开(公告)日：2002-11-22

申请号：NO20111586

申请日：2011-11-18

Applicant: QUALCOMM INC

Inventor： WALTON JAY R ,  WALLACE MARK ,  HOLTZMANN JACK ,  ANTONIO FRANKLIN P

IPC: H04J1/05 ,  H04W28/16 ,  H04B7/005 ,  H04B7/26 ,  H04J3/00 ,  H04J11/00 ,  H04W52/24 ,  H04W52/26 ,  H04W52/34

CPC classification number: H04W52/343 ,  H04B17/336 ,  H04B17/382 ,  H04W52/24 ,  H04W52/241 ,  H04W52/244 ,  H04W52/267 ,  H04W52/286 ,  H04W52/346 ,  H04W72/1231 ,  H04W72/1242 ,  H04W72/1252

Abstract: In some aspects, each cell in the communications system can be designed to operate in accordance with a set of back-off factors that identify the reductions in peak transmit power levels for the channels associated with the back-off factors. The back-off factors are defined to provide the required power to a large percentage of the users while reducing the amount of interference. In some other aspects, the cells operate using an adaptive reuse scheme that allows the cells to efficiently allocate and reallocate the system resources to reflect changes in the system. A reuse scheme is initially defined and resources are allocated to the cells. During operation, changes in the operating conditions of the system are detected and the reuse scheme is redefined as necessary based on the detected changes. For example, the loading conditions of the cells can be detected, and the resources can be reallocated and/or the reuse scheme can be redefined. In yet other aspects, techniques are provided to efficiency schedule data transmissions and to assign channels to users. Data transmissions can be scheduled based on user priorities, some fairness criteria, system requirements, and other factors. Users are assigned to available channels based on a number of channel assignment schemes. Channel metrics are also provided, which can be used to prioritize users and for channel assignments.

公开(公告)号：NO20024635A

公开(公告)日：2002-11-22

申请号：NO20024635

申请日：2002-09-27

Applicant: QUALCOMM INC

Inventor： WALTON JAY R ,  WALLACE MARK S ,  HOLTZMAN JACK M ,  ANTONIO FRANKLIN P

IPC: H04J1/05 ,  H04B7/005 ,  H04B7/26 ,  H04J3/00 ,  H04J11/00 ,  H04W52/24 ,  H04W52/26 ,  H04W52/34 ,  H04Q7/36

CPC classification number: H04W52/343 ,  H04B17/336 ,  H04B17/382 ,  H04W52/24 ,  H04W52/241 ,  H04W52/244 ,  H04W52/267 ,  H04W52/286 ,  H04W52/346 ,  H04W72/1231 ,  H04W72/1242 ,  H04W72/1252

Abstract: In some aspects, each cell in the communications system can be designed to operate in accordance with a set of back-off factors that identify the reductions in peak transmit power levels for the channels associated with the back-off factors. The back-off factors are defined to provide the required power to a large percentage of the users while reducing the amount of interference. In some other aspects, the cells operate using an adaptive reuse scheme that allows the cells to efficiently allocate and reallocate the system resources to reflect changes in the system. A reuse scheme is initially defined and resources are allocated to the cells. During operation, changes in the operating conditions of the system are detected and the reuse scheme is redefined as necessary based on the detected changes. For example, the loading conditions of the cells can be detected, and the resources can be reallocated and/or the reuse scheme can be redefined. In yet other aspects, techniques are provided to efficiency schedule data transmissions and to assign channels to users. Data transmissions can be scheduled based on user priorities, some fairness criteria, system requirements, and other factors. Users are assigned to available channels based on a number of channel assignment schemes. Channel metrics are also provided, which can be used to prioritize users and for channel assignments.

公开(公告)号：HK1040017A1

公开(公告)日：2002-05-17

申请号：HK02101497

申请日：2002-02-27

Applicant: QUALCOMM INC

Inventor： WALTON JAY R ,  KETCHUM JOHN W ,  HOWARD STEVEN J ,  WALLACE MARK S

IPC: H04L12/28 ,  H04B7/005 ,  H04B7/26 ,  H04W52/50 ,  H04W72/14 ,  H04B ,  H04Q

Abstract: A method and apparatus for controlling the transmission of signals from one or more of a plurality of mobile stations (1300) to a base station (1400) on a plurality of M multiple access channels. A power control information packet formed from a plurality of power control bits is transmitted from the base station (1400) to the one or more mobile stations (1300). Each of the power control bits in the power control information packet has a position that is mapped to a selected access channel and to a time offset within the selected access channel. The power control information packet is received at a first mobile station (1300). A message is then transmitted from the first mobile station (1300) to the base station (1400) on a first access channel and at a first time offset associated with the first access channel. The message is transmitted from the first mobile station (1300) at a power level determined in response to a first power control bit in the power control information packet. The first power control bit is located in a first position in the power control information packet, the first position being mapped to the first access channel and the first time offset.

公开(公告)号：AU7341101A

公开(公告)日：2002-01-21

申请号：AU7341101

申请日：2001-07-11

Applicant: QUALCOMM INC

Inventor： JALALI AHMAD ,  WALTON JAY R ,  WALLACE MARK

IPC: H04J11/00 ,  H04B7/06 ,  H04L1/00 ,  H04L1/06 ,  H04L5/02 ,  H04L12/801 ,  H04L12/851 ,  H04L27/26 ,  H04L27/00

Abstract: Transmitter and receiver units for use in an OFDM communications system and configurable to support multiple types of services. The transmitter unit includes one or more encoders, a symbol mapping element, and a modulator. Each encoder receives and codes a respective channel data stream to generate a corresponding coded data stream. The symbol mapping element receives and maps data from the coded data streams to generate modulation symbol vectors, with each modulation symbol vector including a set of data values used to modulate a set of tones to generate an OFDM symbol. The modulator modulates the modulation symbol vectors to provide a modulated signal suitable for transmission. The data from each coded data stream is mapped to a respective set of one or more "circuits".; Each circuit can be defined to include a number of tones from a number of OFDM symbols, a number of tones from a single OFDM symbol, all tones from one or more OFDM symbols, or some other combination of tones. The circuits can have equal size or different sizes. Different circuits can be used for full rate data (e.g., active speech) and low rata data (e.g., silence periods).

公开(公告)号：CA2404055A1

公开(公告)日：2001-10-11

申请号：CA2404055

申请日：2001-03-20

Applicant: QUALCOMM INC

Inventor： HOLTZMAN JACK ,  WALLACE MARK ,  WALTON JAY R ,  ANTONIO FRANKLIN P

IPC: H04J1/05 ,  H04B7/005 ,  H04B7/26 ,  H04J3/00 ,  H04J11/00 ,  H04W52/24 ,  H04W52/26 ,  H04W52/34 ,  H04Q7/36 ,  H04Q7/38

公开(公告)号：WO03071711A2

公开(公告)日：2003-08-28

申请号：PCT/US0305371

申请日：2003-02-19

Applicant: QUALCOMM INC

Inventor： MEDVEDEV IRINA ,  WALTON JAY R ,  KETCHUM JOHN W

IPC: H04J99/00 ,  H04B7/005 ,  H04B7/04 ,  H04B7/06 ,  H04L1/00 ,  H04L1/06

CPC classification number: H04B7/0417 ,  H04B7/0619 ,  H04L1/0001 ,  H04L1/06 ,  H04W52/42

Abstract: Techniques for controlling the transmit power for a number of data streams in a wireless multi-channel (e.g., MIMO) communication system. In one method, a number of received symbol streams are initially processed in accordance with a particular (e.g., CCMI, CCMI-SC, MMSE, or MMSE-SC) receiver processing technique to provide a number of detected data streams. The post-detection SNRs of the detected data streams are estimated, and each SNR that exceeds a setpoint is identified. This setpoint may correspond to (1) the SNR needed to achieve the maximum allowed spectral efficiency or (2) the target SNR needed to achieve a specified spectral efficiency. A new (or adjusted) transmit power for each detected data stream associated with a post-detection SNR that exceeds the setpoint is determined and used for the data stream. Different power control schemes are provided for different classes of receiver processing techniques with different characteristics.

Abstract translation: 用于在无线多信道（例如，MIMO）通信系统中控制多个数据流的发射功率的技术。 在一种方法中，根据特定（例如CCMI，CCMI-SC，MMSE或MMSE-SC）接收机处理技术来初始化处理多个接收到的符号流，以提供多个检测到的数据流。 估计检测到的数据流的检测后SNR，并且识别超过设定点的每个SNR。 该设定点可以对应于（1）实现最大允许频谱效率所需的SNR或（2）实现特定频谱效率所需的目标SNR。 确定与用于超过设定点的检测后SNR相关联的每个检测到的数据流的新（或调整的）发射功率并将其用于数据流。 为不同类型的具有不同特性的接收机处理技术提供不同的功率控制方案。

公开(公告)号：WO0176098A3

公开(公告)日：2002-08-01

申请号：PCT/US0109325

申请日：2001-03-20

Applicant: QUALCOMM INC

Inventor： WALTON JAY R ,  WALLACE MARK ,  HOLTZMAN JACK ,  ANTONIO FRANKLIN P

IPC: H04J1/05 ,  H04B7/005 ,  H04B7/26 ,  H04J3/00 ,  H04J11/00 ,  H04W52/24 ,  H04W52/26 ,  H04W52/34 ,  H04Q7/36 ,  H04Q7/38

CPC classification number: H04W52/343 ,  H04B17/336 ,  H04B17/382 ,  H04W52/24 ,  H04W52/241 ,  H04W52/244 ,  H04W52/267 ,  H04W52/286 ,  H04W52/346 ,  H04W72/1231 ,  H04W72/1242 ,  H04W72/1252

Abstract: In some aspects, each cell in the communications system can be designed to operate in accordance with a set of back-off factors that identify the reductions in peak transmit power levels for the channels associated with the back-off factors. The back-off factors are defined to provide the required power to a large percentage of the users while reducing the amount of interference. In some other aspects, the cells operate using an adaptive reuse scheme that allows the cells to efficiently allocate and reallocate the system resources to reflect changes in the system. A reuse scheme is initially defined and resources are allocated to the cells. During operation, changes in the operating conditions of the system are detected and the reuse scheme is redefined as necessary based on the detected changes. For example, the loading conditions of the cells can be detected, and the resources can be reallocated and/or the reuse scheme can be redefined. In yet other aspects, techniques are provided to efficiency schedule data transmissions and to assign channels to users. Data transmissions can be scheduled based on user priorities, some fairness criteria, system requirements, and other factors. Users are assigned to available channels based on a number of channel assignment schemes. Channel metrics are also provided, which can be used to prioritize users and for channel assignments.

Abstract translation: 在一些方面，通信系统中的每个小区可以被设计为根据一组回退因子进行操作，所述回退因子识别与所述回退因素相关联的信道的峰值发射功率水平的降低。 限制因素被定义为为大量用户提供所需的功率，同时减少干扰量。 在一些其他方面，小区使用允许小区有效地分配和重新分配系统资源以反映系统中的变化的自适应重用方案来操作。 最初定义了重用方案，并将资源分配给小区。 在操作期间，检测到系统的操作条件的变化，并且根据检测到的改变根据需要重新定义重新使用方案。 例如，可以检测小区的负载条件，并且可以重新分配资源和/或重新定义重用方案。 在其他方面，提供了技术来提高调度数据传输并向用户分配信道。 数据传输可以根据用户优先级，一些公平标准，系统要求和其他因素进行调度。 基于多个信道分配方案将用户分配给可用信道。 还提供频道指标，可用于对用户和频道分配进行优先级排序。