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Digital multiplex radio system

  • US 5,963,873 A
  • Filed: 04/21/1997
  • Issued: 10/05/1999
  • Est. Priority Date: 12/20/1996
  • Status: Expired due to Term
First Claim
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1. A digital multiplex radio system which, having a plurality of active lines and at least one spare line, transmits and receives a radio signal with a Synchronous Transfer Mode (STM) signal used as a base band signal, comprising;

  • a plurality of unit cases which have the same configuration, and are portable and replaceable, and one of which is provided for each of a plurality of active lines and at least one spare line;

    a base band processing section, which is contained in each of said unit cases, for inserting Section Over Head (SOH) bite in the STM signal or extracting SOH bite from the STM signal;

    a modulating section, which is contained in each of said unit cases, for modulating the base band signal and outputting the modulated signal;

    a transmitting section, which is contained in each of said unit cases, for converting the modulated signal from said modulating section into a radio signal and transmitting the radio signal;

    a receiving section, which is contained in each of said unit cases, for receiving the radio signal and converting it into a modulated signal;

    a demodulating section, which is contained in each of said unit cases, for converting the modulated signal from said receiving section into a baseband signal;

    a transmission switching section, which is contained in each of said unit cases, for sending the baseband signal on the self line to the self line and the spare line;

    a receiving end section, which is contained in each of said unit cases, for selecting one signal out of the base band signals sent from the self line and the spare line and sending the selected signal to the self line;

    a transmission switching section output port, which is provided on a surface of each of said unit cases, for sending the baseband signal from the transmission switching section of the self unit case to the transmission switching section of the unit case on another line;

    a transmission switching section input port, which is provided on a surface of each of said unit cases, for receiving the baseband signal from the transmission switching section of the unit case on another line to the transmission switching section of the self unit case;

    a receiving end switching section output port, which is provided on a surface of each of said unit cases, for sending the baseband signal from the receiving end switching section of the self unit case to the receiving end switching section of the unit case on another line; and

    a receiving end switching section input port, which is provided on a surface of each of said unit cases, for receiving the baseband signal from the receiving end switching section of the unit case on another line to the receiving end switching section of the self unit case.

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