Key Technologies Of Hybrid PON Based On10G EPON

WDM-PON with powerful access capabilities which represents the development trend of theoptical access technology is considered to be one of the most promising technologies in the nextgeneration Optical Access Network. However, the high cost of WDM-PON has blocked itsapplication in cost-sensitive access network in the present state. It has great theoretical researchvalue and market application prospects that how to achieve the integration of WDM-PONtechnology and current1G/10G EPON system in order to improve the performance of the accessnetwork. A compromise solution that is based on the hybrid TDM-WDM PON has become a hotresearch subject and been commercialized gradually. The Multi-wavelength10G EPON systemwith dual speed is a flexible transitional scheme from TDM to WDM.The hybrid TDM-WDM PON scheme proposed in this thesis is mainly based on10G EPON,and significantly increases the bandwidth using DWDM technique. The framework of the networkand the selection of working wavelengths have been designed in this upgraded scheme. It extendsthe PHY layer and Datalink layer, and some key techniques, such as ranging, automaticallydiscovery and registration, resource management, are also discussed. The thesis introduces a newbandwidth allocation algorithm with dual-rate and multi-wavelength, based on IPACT, in whichtimeslots of ONUs will be scheduled in different rate and different working conditions, and someONUs will send REPORT before the end of the cycle to balance the bandwidth resources withwavelength scheduling under the condition of heavyload. Finally, the results of the OPNET Modelersimulation shows performance of the algorithm is satisfying, delay is stable and the utilization ofchannels is improved.