KEYWORDS: Optical fibers, Data transmission, Data communications, Time division multiplexing, Optical communications, Optical networks, Field programmable gate arrays, Passive optical networks, Fiber optic communications, Control systems
Passive Optical Network (PON), which possess the advantages of high efficiency, high speed and high bandwidth utilization, is a type of fiber channel technology that acquires the most concern. As a type of key technology in military weapon electronic system, the target of fiber channel data bus is to offer actual-time, high-speed and reliable communication link between instruments. In this article, a type of fiber channel data bus, which is based on PON topology, is raised and elaborated. The elaboration is concentrated on the designation of the topology and protocol used in the fiber channel data bus. On this basis, the research emphasis is the upstream Media Access Control (MAC) layer in the Network Terminal (NT) of the fiber channel data bus which is designed. Firstly, the upstream synchronization method and frame structure in GPON standards are analysed. Then, the upstream MAC layer control is actualized through Xilinx FPGA devices.
This paper first briefly describes the transport protocol, topology, technical characteristics and application status of the typical military electronic system MIL-STD-1553B bus. With respect to defects such as the bus bandwidth shortage, limited fault tolerance and complicated maintaining, this paper proposes a PON architecture based bus-type optical fiber data bus (FTB) technology with high bandwidth, low latency and strong fault tolerance. This paper mainly studies the bus topology based on the passive optical network (PON) architecture, the physical layer design based on burst mode laser drive circuit (BM-LDD) as well as the digital burst automatic power control circuit, and the design based on multi-point control protocol (MPCP) of time-division response mode. The designed optical fiber bus provides real-time, high-speed and highly reliable communication links for information exchange (video, audio, radar, distributed sensor data, etc.) between various electronic systems of military weapons. It can also accumulate technology for engineering application of optical fiber data bus technology.
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