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    • 3. 发明授权
    • Method and a device for enhanced performance in a cellular wireless TDD system
    • 蜂窝无线TDD系统中增强性能的方法和装置
    • US08537688B2
    • 2013-09-17
    • US12528344
    • 2007-02-23
    • David AstelyPer SkillermarkTobias TynderfeldtErik WesterbergHannes Ekström
    • David AstelyPer SkillermarkTobias TynderfeldtErik WesterbergHannes Ekström
    • G01R31/08
    • H04B7/2656
    • The invention discloses a method (1100) for a cellular wireless access TDD system (100) with a base stations (120, 220) for respective cells (110, 210) in the system, where each cell can accommodate at least a first user terminal (130, 230). The user terminals can receive traffic from their base stations during a down link period, and can transmit traffic to their base stations (120, 220) during an up link period (UL). There is a first guard period (TDu) at the transition from down link to up link, and a second guard period (TUD) at the transition from up link to down link. The method comprises measuring the interference level in a second plurality (110, 210) of cells during part of the time between two consecutive down link periods, and varying the duration of said first and/or second guard period in said second plurality of cells (110, 210) according to the interference level.
    • 本发明公开了一种用于蜂窝无线接入TDD系统(100)的方法(1100),该系统具有用于系统中的相应小区(110,210)的基站(120,220),其中每个小区可容纳至少第一用户终端 (130,230)。 用户终端可以在下行链路周期期间从其基站接收业务,并且可以在上行链路周期(UL)期间向其基站(120,220)传送业务。 在从下行链路到上行链路的过渡期间存在第一保护期(TDu),以及从上行链路到下行链路的转变的第二保护期(TUD)。 该方法包括在两个连续的下行链路周期之间的部分时间内测量第二多个(110,210)小区中的干扰电平,并改变所述第二多个小区中的所述第一和/或第二保护周期的持续时间( 110,210)。
    • 8. 发明申请
    • UPLINK SCRAMBLING DURING RANDOM ACCESS
    • 随机访问期间的上拉屏
    • US20120176995A1
    • 2012-07-12
    • US13430844
    • 2012-03-27
    • Stefan ParkvallErik DahlmanTobias Tynderfeldt
    • Stefan ParkvallErik DahlmanTobias Tynderfeldt
    • H04W74/08H04W72/04
    • H04W72/0413H04W72/02H04W74/004H04W74/0833
    • The technology described in this case facilitates random access by a user terminal with a radio base station. A user terminal determines one of a first type of uplink scrambling sequences and generates a random access message using the determined one of the first type of uplink scrambling sequences. The random access message is transmitted to the base station. The user terminal receives from the base station a second, different type of uplink scrambling sequence and uses it for subsequent communication with the radio base station. For example, the first uplink scrambling sequences may be specifically associated with the radio base station's cell area or a random access radio channel associated with the radio base station, but they are not specifically assigned to any user terminal, and the second uplink scrambling sequence may be selected from a second set of uplink scrambling sequences specifically assignable to individual user terminals.
    • 在这种情况下描述的技术有助于用无线电基站的用户终端的随机接入。 用户终端确定第一类型的上行链路扰频序列中的一个,并且使用所确定的第一类型的上行链路扰频序列来生成随机接入消息。 随机接入消息被发送到基站。 用户终端从基站接收第二种不同类型的上行加扰序列,并将其用于与无线基站的后续通信。 例如,第一上行链路扰频序列可以与无线电基站的小区区域或与无线电基站相关联的随机接入无线电信道具体地关联,但是它们没有被特别分配给任何用户终端,并且第二上行链路加扰序列可以 从可专用于各个用户终端的第二组上行链路扰频序列中选择。