Time and wavelength division multiplexed passive optical network resource allocation mechanism based on linear prediction

The invention discloses a time and wavelength division multiplexed passive optical network resource allocation mechanism based on flow prediction and belongs to the technical field of passive optical networks in access networks. According to the mechanism, when an OLT authorizes a bandwidth request of an ONU, wavelength allocation is conducted with the earliest free wavelength priority algorithm firstly, then allocation of time slot bandwidths on each wavelength is conducted with the linear prediction algorithm, and prediction bandwidth and the required bandwidth of an uplink REPORT frame of the ONU are authorized to the ONU together. In this way, data newly reaching the ONU can be considered as much as possible in the whole request-authorization process, so that the data are sent in the same period instead of waiting to be sent in the next period, and then packet delay can be reduced as much as possible.