The Architectures Research And Hardware System Implementation Of The Ethernet Passive Optical Networks

Driven by the continuous development and broad prevalence of Internet traffics, requirement for bandwidth of access networks is higher and higher. PON is the most widely deployed optical access network at present. The work of this dissertation is the important content of the national 863 plan program"The Broad Passive Optical Network Based on Gigabit Ethernet". This dissertation analyses and studies several arichitectures of EPONs and the key technologies of physical and MAC layer of GEPON and WEPON designed by the HUST, and gives some innovation, meanwhile specifies the systematic architecture design and hardware implementation of these two system. The specific study contentions are as follows:(1) Studied the architectures of four generalized EPONs including GEPON, WEPON, 10G EPON and 10G WEPON, in which WEPON architecture was first presented, and compared their performace and application fields.(2) Introduced the essential technology of physical and MAC layer protocol in GEPON. In physical layer, the protection technology of trunk redundancy was proposed. In MAC layer, multipoint MAC control protocol (MPCP) was specified.(3) Specified the overall design and hardware implementation of a GEPON system, gave the architecture and function-partition of the system, defined and depicted the internal and external interfaces of the system, designed the broad card unit of CO device and so on, designed the functional module of terminal devices, and designed the passive splitter device of PON. Finally, giving the test results on the GEPON system.(4) Researched and then specified the protocol implementation of physical and MAC layer of WEPON. In physical layer, low cost implementation technology was proposed, such as narrowband optical filter, low cost DWDM laser and upstream wavelength mux/demux technology. For cases where up/downstream bandwidth is symmetric and ONU is a station, up/downstream bandwidth is symmetric and ONU is a bridge, and up/downstream bandwidth is asymmetric and ONU is bridge, P2PE implementation of WEPON and compatibility consideration of VLAN setting are proposed in MAC layer.(5) Specified the overall design and hardware implementation of WEPON system, gave the architecture and function-partition of the system, defined and depicted the internal and external interfaces of the system, designed the broad card unit of CO device and so on, design the functional module of remote devices and terminal devices, and design the passive splitter device of PON. Finally, giving the test results on the WEPON system. (6) Researched on 10G EPON and 10G WEPON, and gave the protocol model and the most probable implementation method of 10G EPON. Gave an integrated second layer protocol model particularly aiming at 10G-downstream/1G-upstream WEPON, and demonstrated its implementation mechanism, and proposing a multi-wavelength MAC control (MWMC) mechanism.