In this thesis， dynamic bandwidth allocation algorithm TGOGT where the two groups of ONU are granted in turn and allocation bandwidth according to the characteristic of network traffic and their delay request for different service is brought forward In TGOGT,all ONUs in the system are departed into two groups，and the queue-threshold was set for every group．Two groups of ONUs report and grant in turn， as the network load changes，OLT converts the way of granting every ONU．

EPON中的MAC协议研究及上行接入算法的实现.pdf

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