| 摘要 |
<p>A method for generating a timing signal of a base site, each base site receiving an external high accuracy signal (218) for using as a first reference signal. In order to ensure the synchronization of the base sites in all conditions the method comprises the steps of: comparing a primary clock signal (210) with a secondary clock signal (212) for producing an adjustment signal (217); adjusting as a response to said adjustment signal (217) the phase and frequency of the secondary clock signal (212); storing an adjustment signal information in a memory (203); in the presence of the external high accuracy signal, selecting the primary clock signal (210) as the timing signal; in the absence of the external signal, selecting the secondary clock signal (212) as the timing signal.</p> |
