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178 条记录 (耗时 0.022 秒)

    SEQUENCE NUMBERING RANGE EXTENDING METHOD AND SYSTEM FOR SELECTING REPEAT TRANSMISSION PROTOCOLS
    31.
    发明授权
    SEQUENCE NUMBERING RANGE EXTENDING METHOD AND SYSTEM FOR SELECTING REPEAT TRANSMISSION PROTOCOLS 失效
    FOR选择性重复协议序号范围扩展的方法和系统

    公开(公告)号：EP0978174B1

    公开(公告)日：2009-07-15

    申请号：EP98930267.4

    申请日：1998-06-16

    申请人： QUALCOMM INCORPORATED

    发明人： REZAIIFAR, Ramin ,  TIEDEMANN, Edward, G., Jr. ,  BENDER, Paul, E. ,  TOMCIK, James, D.

    IPC分类号： H04L1/18

    CPC分类号： H04L1/1809 ,  H04L1/165 ,  H04L1/1841

    摘要： A method and system for transmitting digital data by extending the sequence numbering range for a selective repeat transmission protocol are described. In accordance with one embodiment of the invention, data frames (70) are transmitted including an eight-bit sequence number (72) and a one-bit retransmit flag (74). The one-bit retransmit flag (74) indicates whether the frame is newly transmitted or retransmitted due to a failed first transmission. Transmit (50) and receive (52) systems each maintain a twelve-bit sequence number referred to as a "long sequence number" comprised of the eight-bit sequence number transmitted with each frame and a four-bit extension. The long sequence number is transmitted within a control frame (82) and the eight-bit sequence number is transmitted within the data frame (72).

    Power control during state transition
    32.
    发明授权
    Power control during state transition 有权
    的状态转变过程中的发送功率控制

    公开(公告)号：EP1464126B1

    公开(公告)日：2009-03-25

    申请号：EP03701979.1

    申请日：2003-01-03

    申请人： Qualcomm, Incorporated

    发明人： CHEN, Tao ,  TIEDEMANN, Edward, G., Jr.

    IPC分类号： H04B7/005

    CPC分类号： H04W52/50 ,  H04W52/58

    摘要： A power control system for use in facilitating transition to an active state. The system includes a first transceiver (104), such as a BTS, having the ability to initiate transmission of a power control function. The transceiver (104) comprises a generator (210) and a transmitter (202) for the power control arrangement. The system further includes a second transceiver (106), such as a terminal, for receiving the power control arrangement and coherently combining the power control arrangement to determine a state transition indication. The second transceiver (106) includes a transmitter (204) that transmits a selected waveform subsequent to the coherent combining. The first transceiver (104) receives the selected waveform, determines a power level associated therewith, and provides feedback to the second transceiver (106). The power control arrangement may include groups of redundant power control data, data transmitted on idle feedback dimensions, or predetermined signal patterns in addition to at least one power control group.

    SYSTEM AND BASE STATION FOR PROVIDING WIRELESS COMMUNICATION SYSTEM SYNCHRONIZATION
    34.
    发明授权
    SYSTEM AND BASE STATION FOR PROVIDING WIRELESS COMMUNICATION SYSTEM SYNCHRONIZATION 有权
    系统和基站同步在无线通信系统

    公开(公告)号：EP1135875B1

    公开(公告)日：2007-07-11

    申请号：EP99965114.4

    申请日：1999-12-03

    申请人： QUALCOMM INCORPORATED

    发明人： WALLACE, Mark, S. ,  TIEDEMANN, Edward, G., Jr. ,  WHEATLEY, Charles, E., III ,  WALTSON, J., Rod

    IPC分类号： H04B7/26

    CPC分类号： H04B7/2696

    摘要： When insufficient traffic is present in the network to maintain synchronization in this manner, other methods must be used. One approach involves making direct measurements of the timing between base stations (602, 604). This is accomplished in one of two ways. The base may interrupt its transmissions on all sectors for a short interval during which it determines the time of arrival of signals from other base stations (602, 604). Given knowledge of the other base station locations, time errors relative to all other base stations (602, 604) may be derived. Alternatively, the base may send a short signal at high power in the mobile transmit band. This time-of-arrival of this signal is measured by the surrounding base stations and the time errors between pairs of base stations are computed. In some cases, a base station (602, 604) may be isolated sufficiently from all other base stations in the network such that direct base-to-base measurement is not viable. In this case, a fixed mobile (606) is placed at a location in the handoff region between the isolated cell and another cell in the network. The fixed mobile (606) either performs measurements of base station pilots on command of the base and reports the timing information, or sends a burst transmission at a specified time and power level to be measured by the base stations.

    METHOD FOR COORDINATING BASE STATION TRANSMISSION WITH MOBILE STATION SCANNING TIMES
    35.
    发明授权
    METHOD FOR COORDINATING BASE STATION TRANSMISSION WITH MOBILE STATION SCANNING TIMES 有权
    协调基站传输的与移动站的监视时间方法

    公开(公告)号：EP1076956B1

    公开(公告)日：2006-05-31

    申请号：EP99918916.0

    申请日：1999-04-30

    申请人： QUALCOMM INCORPORATED

    发明人： CHEN, Tao ,  TIEDEMANN, Edward, G., Jr. ,  SAINTS, Keith, W. ,  GLAUSER, Olivier

    IPC分类号： H04L12/00

    CPC分类号： H04W36/0083 ,  H04L1/0045 ,  H04W8/005 ,  H04W24/10 ,  H04W28/06 ,  H04W36/06 ,  H04W36/14 ,  H04W36/38 ,  H04W52/44

    摘要： A method and apparatus for coordinating the time at which a mobile station (5) performs searches for alternative systems to which a hard handoff will occur. In one system which includes the present invention, the mobile station (5) receives a command which instructs the mobile station (5) as to when to tune to alternative frequencies in order to search for indications of the presence of an alternative system. In another system which includes the present invention, predetermined times are defined with respect to a reference point in time that is common to both an origination base station (10) and a mobile station (5). The mobile station (5) tunes to alternative frequencies to perform searches only during these predetermined times. In addition, the mobile station (5) coordinates the transmission of reports which indicate the results of searches for alternative systems such that these reports are only transmitted from the mobile station (5) when the mobile station (5) is tuned to the origination frequency.

    METHOD AND APPARATUS FOR HIGH RATE DATA TRANSMISSION IN A SPREAD SPECTRUM COMMUNICATION SYSTEM
    37.
    发明授权
    METHOD AND APPARATUS FOR HIGH RATE DATA TRANSMISSION IN A SPREAD SPECTRUM COMMUNICATION SYSTEM 失效
    方法和设备，在一个SPREIZSPEKTRUMÜBERTRAGUNGSSYSTEM高速数据传输

    公开(公告)号：EP0903051B1

    公开(公告)日：2005-11-16

    申请号：EP97928730.7

    申请日：1997-05-28

    申请人： QUALCOMM INCORPORATED

    发明人： TIEDEMANN, Edward, G., Jr. ,  JOU, Yu-Cheun ,  ODENWALDER, Joseph, P.

    IPC分类号： H04Q7/38

    CPC分类号： H04W28/18

    摘要： The present invention is a method and apparatus for transmitting high rate data packet in a CDMA communication system. The transmission system transmits a first channel assignment message indicating the at least one additional channel that will be used to support the high rate data packet. The first channel assignment message is sent in advance of the onset of high rate data communications. In addition the present invention provides within the first frame of high rate data a duplicate channel assignment message. A remote receiver uses the channel assignment messages to initialize its demodulation elements (114 and 120) to receive the additional information carried on the at least one additional channel.

    A METHOD OF AND APPARATUS FOR CONTROLLING HANDOFF IN A COMMUNICATION SYSTEM
    39.
    发明授权
    A METHOD OF AND APPARATUS FOR CONTROLLING HANDOFF IN A COMMUNICATION SYSTEM 失效
    方法和装置越区切换通信系统来控制

    公开(公告)号：EP0960547B1

    公开(公告)日：2005-05-11

    申请号：EP98907413.3

    申请日：1998-02-10

    申请人： QUALCOMM Incorporated

    发明人： TIEDEMANN, Edward, G., Jr. ,  JOU, Yu-Cheun

    IPC分类号： H04Q7/38

    CPC分类号： H04W36/38 ,  H04W36/18 ,  H04W52/40

    摘要： A method and apparatus for controlling the transmit power of a high rate code division multiple access (CDMA) link is described. The channel condition to a subscriber unit (30a, 30b, 30c) is evaluated and the configuration of a high rate link in soft handoff is based on the channel condition. If a fading channel is detected the supplemental channels (52) of the high rate link are transmitted from multiple base stations (32a, 32b). If a non-fading channel is detected the supplemental channels of the high rate link are transmitted from a single base station. Parameters monitored to determine the channel condition include the pilot strength, pilot code offset and error rate.