| 摘要 |
<p>A method and apparatus for checking a data frame length relate to an Ethernet passive optical network in the communication field. The method includes: during reception of an Ethernet frame, when determining through analysis that a received Ethernet frame is a data frame, extracting frame length information and frame indication information in the data frame, and calculating a frame length mantissa according to the frame length information; writing the data frame into a small cache for storage according to the frame indication information, and counting write enable signals used for controlling writing of a data frame by using a base-N counter, so as to obtain a count value of the write enable signal; and comparing the frame length mantissa with the count value, and if a comparison result is consistent, then a data frame length being successfully checked, and writing the frame length information into the small cache for storage. In the embodiment of the present invention, it can ensure that the length of whole frame data written into a cache is consistent with the written frame length information, thereby avoiding that whole frame information cannot be read each time when cached data are read caused by an error occurs in the frame length information.</p> |
