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Method for radiosynchronization of base stations in a simulcasting network

  • US 5,404,575 A
  • Filed: 05/26/1992
  • Issued: 04/04/1995
  • Est. Priority Date: 03/05/1992
  • Status: Expired due to Fees
First Claim
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1. A method for radiosynchronization of base stations in a simulcasting network which includes a synchronization controller and a plurality of base stations to be synchronized, said plurality of base stations comprising a first set of base stations and a second set of base stations, comprising the following steps:

  • a.) said first set of base stations transmitting respective synchronization signals;

    b.) said second set of base stations receiving at least one of said respective synchronization signals for the purpose of determining several estimates of synchronization error, where each of said several estimates is an estimate of synchronization error between one of said first set of transmitting base stations and one of said second set of receiving base stations, and wherein a component of the estimate of synchronization error is evaluated as a difference of1) instant of transmission of the synchronization signal according to a clock of a sending base station; and

    2) instant of reception of the synchronization signal according to a clock of a receiving base station;

    c.) sending said several estimates of synchronization error to said synchronization controller; and

    ,d.) said synchronization controller adjusting timing of subsequent transmission of a particular base station within said first or second set of base stations to minimize synchronization errors between base stations within said first or second set to achieve simulcast transmission of all said base stations in said network, wherein said adjustment is made based upon said several estimates, and wherein each of said several estimates was obtained based upon a synchronization signal which was either received or transmitted by the particular base station being adjusted.

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