| EPON combines Ethernet technology with passive access network technology, which has the advantages of high-bandwidth,low-cost, easy maintenance and carrying data services efficiently, and it gradually becomes the mainstream of FTTx technology. WiMAX is the new technology for broadband wireless access network, which has the features of wide coverage, flexible access and support for mobility and QoS.With the development of access network technology, the integration of fiber access and wireless access is in accordance with the broadband and ubiquitous trend of access network, and therefore it becomes a new and hot research direction. The novel research on the integration of EPON and WiMAX is significant.With the support of national 863 project "The architecture and key technologies of dynamic, heterogeneous and integrated access networks, supporting P2P and multicast integrated services", this dissertation is mainly deployed on the design and implementation of the WiMAX board, which is the core component in the novel EPON and WiMAX integrated access system (EPW system for short).EPW system has the following advantages.Dynamic allocation and scheduling of network bandwidth resources can ensure QoS requirements. This novel EPON architecture,which adopts a novel circled architecture splitter, is capable of adapting to P2P, group broadcasting services and other integrated access and loads.The integration of EPON and WiMAX broadband access technology can serve both fixed and mobile broadband users.WiMAX board which is located in integrated ONUs completes uplink and downlink frame processing and frame format conversion. The main contents are as follows: 1)The implementation of the WiMAX board is accomplished. According to the architecture and functional requirements of EPW system, this dissertation completes the analysis on WiMAX board and design and division of the internal function modules.2)The design of circuit schematic and PCB layout about the WiMAX board is completed, including the implementation of PCI bus interface with FPGA and PCI interface chip, core chip selection and PCB layout.3)The debugging and testing is finished, including bidirectional communication test between BS and SS and joint test between WiMAX board and EPON board. The details are following, WiMAX board loopback debug and uplink and downlink bidirectional communication debugging, as well as the data throughput test. The results show that the design is feasible and reasonable. |
