| CPC H04J 14/0235 (2013.01) [H04L 63/12 (2013.01)] | 20 Claims |

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1. An upstream resource grant method comprising:
generating, by an optical line terminal, an upstream grant message on which transformation processing has been performed, wherein a transformation parameter used for the transformation processing comprises a physical identity of an optical network unit and wherein the transformation processing is performed on at least one of:
at least some payload fields of the upstream grant message by using the transformation parameter,
a check field of the upstream grant message by using the transformation parameter, or
the check field and the at least some payload fields of the upstream grant message by using the transformation parameter; and
sending, by the optical line terminal, the upstream grant message on which the transformation processing has been performed, wherein the upstream grant message carries an upstream resource grant indication of the optical network unit, and the upstream resource grant indication indicates an upstream resource granted to the optical network unit.
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