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    Providing reference signal to radio heads
    1.
    发明授权
    Providing reference signal to radio heads 失效
    向无线电头提供参考信号

    公开(公告)号：US06810270B1

    公开(公告)日：2004-10-26

    申请号：US09705093

    申请日：2000-11-02

    申请人： Ossi Ilari Grohn ,  Anthony Salvatore Fugaro ,  Michael Francis Marlborough

    发明人： Ossi Ilari Grohn ,  Anthony Salvatore Fugaro ,  Michael Francis Marlborough

    IPC分类号： H04B138

    CPC分类号： H04J3/0647

    摘要： A method and apparatus for supplying a timing signal from a central unit to at least one radio head connected to the central unit via a communications link. An external signal, typically generated by a MSC, is received at a first framer of the central unit and the first framer generates a reference clock signal based thereon. This reference clock signal is used as the transmit clock for a second framer, known as the radio head framer. The radio head framer transmits a radio head downlink signal to the radio head(s) via the communications link. The radio head downlink signal typically includes payload information and an associated timing reference signal, typically in the form of an embedded clock signal. This timing reference signal of the downlink is based on the reference clock signal from the first framer, rather than being based on a clock signal from an oscillator within the central unit. The transceivers within the radio head(s) may then control their RF transmissions using the timing reference signal from the radio head framer of the central unit. Accordingly, the radio head(s) are provided with a timing reference signal that is based relatively directly on the signal from the MSC.

    摘要翻译： 一种用于经由通信链路将定时信号从中央单元提供给连接到中央单元的至少一个无线电头的方法和装置。 通常由MSC产生的外部信号在中央单元的第一成帧器处被接收，并且第一成帧器基于此产生参考时钟信号。 该参考时钟信号被用作第二成帧器的发射时钟，称为无线电头部成帧器。 无线电头成帧器经由通信链路将无线电头下行链路信号发送到无线电头。 无线电头下行信号通常包括有效载荷信息和相关联的定时参考信号，通常以嵌入式时钟信号的形式。 下行链路的该定时参考信号基于来自第一成帧器的参考时钟信号，而不是基于来自中央单元内的振荡器的时钟信号。 无线电头内的收发器然后可以使用来自中央单元的无线电头部成帧器的定时参考信号来控制其RF传输。 因此，无线电头具有相对直接基于来自MSC的信号的定时参考信号。

    Bus arbitrators for common local oscillators in cellular radiotelephone base stations
    2.
    发明授权
    Bus arbitrators for common local oscillators in cellular radiotelephone base stations 失效
    蜂窝无线电话基站中常见的本地振荡器的总线仲裁器

    公开(公告)号：US5887267A

    公开(公告)日：1999-03-23

    申请号：US832755

    申请日：1997-04-04

    申请人： Anthony Salvatore Fugaro

    发明人： Anthony Salvatore Fugaro

    IPC分类号： H04B1/40 ,  H04Q7/30

    CPC分类号： H04B1/40

    摘要： A transceiver board for use in a cellular radiotelephone base station comprises a first cellular radio transceiver including a first controller that controls the operation of the first transceiver, a second cellular radio transceiver including a second controller that controls the operation of the second transceiver, common local oscillator that generates a tuning signal used by the first and second transceivers for tuning a radio signal, and an arbitrator that is connected to the first and second controllers and that determines which of the first and second controllers communicates with the common local oscillator. Preferably, the arbitrator is implemented by a programmable device such as a programmable logic device (PLD) that monitors the first and second controllers to determine which controller attempts to communicate with the common local oscillator first so that that controller is allowed to communicate with a common local oscillator to the exclusion of the other controller. Alternatively, the arbitrator can be implemented by a programmable device that monitors the first and second controller and a tristate buffer that is connected to the programmable device and that connects either the first or second controller to the common local oscillator as controlled by the programmable device.

    摘要翻译： 用于蜂窝无线电话机基站的收发机板包括：第一蜂窝无线电收发器，包括控制第一收发器的操作的第一控制器;第二蜂窝无线电收发器，包括控制第二收发器的操作的第二控制器， 振荡器，其产生由第一和第二收发器用于调谐无线电信号的调谐信号，以及仲裁器，其连接到第一和第二控制器，并且确定第一和第二控制器中的哪一个与公共本地振荡器通信。 优选地，仲裁器由诸如可编程逻辑器件（PLD）的可编程器件实现，该可编程器件监视第一和第二控制器以确定哪个控制器首先尝试与公共本地振荡器通信，以便允许该控制器与公共通信 本地振荡器排除其他控制器。 或者，仲裁器可以由监视第一和第二控制器的可编程设备以及连接到可编程设备的三态缓冲器来实现，并且将第一或第二控制器连接到由可编程设备控制的公共本地振荡器。