WIRELESS COMMUNICATIONS SYSTEM EMPLOYING OFDMA AND CDMA TECHNIQUES
    4.
    发明公开
    WIRELESS COMMUNICATIONS SYSTEM EMPLOYING OFDMA AND CDMA TECHNIQUES 审中-公开
    与使用OFDMA和CDMA程序无线通信系统

    公开(公告)号:EP1972069A1

    公开(公告)日:2008-09-24

    申请号:EP07709748.3

    申请日:2007-01-12

    IPC分类号: H04B1/707 H04L27/26

    摘要: Disclosed is an Orthogonal Frequency Division Multiple Access (OFDMA) based wireless communications system operable to communicate OFDMA type signals over a set of dynamically assigned orthogonal sub-carriers and Code Division Multiple Access (CDMA) type signals over a set of pre-allocated orthogonal sub-carriers. The OFDMA system utilizes pre-allocated orthogonal sub-carriers for CDMA type signal transmission in order to reduce the number of dynamic assignments of orthogonal sub-carriers in a typical OFDMA system. The OFDMA type signals may be signals processed in accordance with well-known OFDMA techniques, whereas the CDMA type signals may be signals processed in accordance with well-known CDMA and OFDMA techniques. The CDMA type signals may also be processed using a pre- coder incorporating a Discrete Fourier Transformer (DFT) matrix or Identity matrix to reduce the Peak-to-Average Power Ratio across the OFDMA system.

    METHODS OF REVERSE LINK POWER CONTROL
    8.
    发明公开
    METHODS OF REVERSE LINK POWER CONTROL 有权
    VERFAHREN ZURRÜCKWÄRTSLEISTUNGSSTEUERUNG

    公开(公告)号:EP1985033A1

    公开(公告)日:2008-10-29

    申请号:EP07750721.8

    申请日:2007-02-13

    IPC分类号: H04B7/005

    摘要: Methods of reverse link power control are provided. In a first example reverse link power control process, a signal-to-interference+noise (SINR) is measured for a plurality of mobile stations (S605). A power control adjustment is determined for each of the mobile stations based on the measured SINR for the mobile station and a fixed target SINR, the fixed target SINR being used in the determining step for each mobile station and sending the power control adjustments to the mobile stations (S610). In a second example reverse link power control process, one or more signals are transmitted to a base station (S405). A power control adjustment indicator indicating an adjustment to a transmission power level is received (S415). The received power control adjustment is determined based on a measured signal-to-interference+noise ratio (SINR) for the one or more transmitted signals and a fixed target SINR threshold, the fixed target SINR threshold being used for power control adjustment of a plurality of mobile stations (S410).

    摘要翻译: 提供反向链路功率控制的方法。 在第一示例性反向链路功率控制处理中,针对多个移动站测量信号与干扰+噪声(SINR)。 基于移动站的测量SINR和固定目标SINR确定每个移动站的功率控制调整,在每个移动台的确定步骤中使用固定目标SINR,并将功率控制调整发送到移动台 站。 在第二示例性的反向链路功率控制过程中,一个或多个信号被发送到基站。 接收指示对发送功率电平的调整的功率控制调整指示符。 基于用于一个或多个发送信号的测量信号与干扰+噪声比(SINR)和固定目标SINR阈值确定接收功率控制调整,固定目标SINR阈值用于多个功率控制调整 的移动台。

    METHODS OF REVERSE LINK POWER CONTROL
    10.
    发明公开
    METHODS OF REVERSE LINK POWER CONTROL 审中-公开
    VERFAHREN ZUR LEISTUNGSSTEUERUNG EINERRÜCKWÄRTSVERBINDUNG

    公开(公告)号:EP1985055A2

    公开(公告)日:2008-10-29

    申请号:EP07750716.8

    申请日:2007-02-13

    IPC分类号: H04L5/02 H04B7/005

    摘要: Methods of reverse link power control are provided. A first example method includes first measuring a first type of interference (S600), second measuring a second type of interference (S605), determining a ratio between the first and second measurements (S610) and broadcasting the determined ratio to a plurality of mobile units (S615). A second example method includes receiving a broadcasted ratio indicating a ratio between two different types of interference (S650) and calculating a power level for reverse link transmissions based on the received broadcasted ratio (S655). A third example method includes first adjusting OFDMA transmission power based on first feedback signals during an OFDMA transmission (S725) and second adjusting OFDMA transmission power based on second feedback signals during periods between OFDMA transmissions (S 745). A fourth example method includes receiving a plurality of interference indicating signals from different base stations (S805) and deteπnining whether to adjust a maximum transmit power threshold based on the plurality of interference indicating signals, the maximum transmit power threshold indicating the maximum permitted transmission power level below which transmissions are constrained (S810).

    摘要翻译: 提供反向链路功率控制的方法。 第一示例性方法包括首先测量第一类型的干扰,第二测量第二类型的干扰,确定第一和第二测量之间的比率,并将所确定的比率广播到多个移动单元。 第二示例性方法包括接收指示两种不同类型的干扰之间的比率的广播比率,并且基于所接收的广播比率来计算反向链路传输的功率电平。 第三示例性方法包括在OFDMA传输期间基于第一反馈信号来调整OFDMA传输功率,并且在OFDMA传输之间的时段期间,基于第二反馈信号来第二调整OFDMA传输功率。 第四示例性方法包括从不同的基站接收多个干扰指示信号,并且基于多个干扰指示信号来确定是否调整最大发射功率阈值,所述最大发射功率阈值指示最大允许传输功率电平低于哪个传输 被约束。