| 摘要 |
<p>Method for maintaining time synchronization between a mobile station and a base station in a cellular digital radio system of the time distribution multiple access type, conveying data in the form of frames. The method of the invention comprises the iterative steps of measuring (1) the frequency offest between the transmission carrier frequency of the base station and the transmission carrier frequency of the mobile station; transforming (2) the frequency offset into a first time drift; correcting (3) the first time drift by altering the length of at least one of the frames; measuring (4) a second time drift resulting from the geographical remoteness between the base station and the mobile station, correcting (5) the second time drift by altering the length of at least one the frames.</p> |
