| 摘要 |
<p>The present invention relates to a method for measuring a link delay between nodes in a CRAN, which is capable of measuring a link delay between a DU and a RU more efficiently and accurately. The method for measuring a link delay between nodes in a CRAN is performed in the CRAN where a DU is connected to one or more remote RUs. The method comprises the following steps: (a) generating, by the DU, a hyper frame for a DU-sided test including a test pattern and then transmitting the generated hyper frame to an RU upon counting; (b) generating, by the RU, a hyper frame for an RU-sided test and transmitting the generated hyper frame to the DU, in cases where the RU receives the hyper frame for a DU-sided test from the DU and a counting time between the reception time of the hyper frame for a DU-sided test and the reception time of the hyper frame for an RU-sided test to determine a frame offset (T_offset); (c) counting time between count starting time obtained in step (a) and the reception time of the hyper frame for an RU-sided test to determine T_14 that is a frame timing difference; and (d) calculating a link delay (T_12=T_34) by T_12=T_34=(T_14-T_offset)/2.</p> |
