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1. (WO2009124484) A METHOD, SYSTEM AND DEVICE FOR TRANSMITTING DATA IN OPTICAL NETWORK

Pub. No.:    WO/2009/124484    International Application No.:    PCT/CN2009/071134
Publication Date: Oct 15, 2009 International Filing Date: Apr 1, 2009
IPC: H04B 10/04
Applicants: HUAWEI TECHNOLOGIES CO., LTD.
华为技术有限公司
YANG, Sulin
杨素林
NIU, Lehong
牛乐宏
Inventors: YANG, Sulin
杨素林
NIU, Lehong
牛乐宏
Title: A METHOD, SYSTEM AND DEVICE FOR TRANSMITTING DATA IN OPTICAL NETWORK
Abstract:
A method, system and device for transmitting data in optical network are provided. The method includes the following steps: obtaining the respective first round trip delay Rtd value of the ranged ONU and the non-ranged ONU; obtaining the second round trip delay Rtd value of the ranged ONU; obtaining the variational value of the Rtd values; based on the variational value and the first Rtd value of the non-ranged ONU, obtaining the second Rtd value of the non-ranged ONU; based on the respective second Rtd value obtained of the ranged ONU and the non-ranged ONU, obtaining and transmitting the equalized delay EqD value corresponding to the ranged ONU and the non-ranged ONU. The system includes the transmission device, the ranged device and the non-ranged device. The device includes the obtaining module, the ranging module, the difference value module, the processing module and the transmission module. When the PON network triggers the switch of primary OTL and standby OTL as the primary fiber fault or the primary OTL device fault appears, this invention only needs range an ONU, the ranging time is saved.