一种光通道数据单元分组电路设计与实现

Design and implementation of an optical data unit packet circuit

针对包结构进行数据交换的光传输网络由于时钟抖动和漂移造成数据分组困难的问题,设计了一种基于G.709规范的光通道数据单元动态分组电路。使用异步FIFO缓存输入数据,仲裁器根据异步FIFO中的数据量裁决出分组的数据包大小,使用数据包生成器完成数据包的生成。电路仿真与综合结果表明,该电路能够将输入数据切割成固定大小±1的数据包。

：Considering the input clock jitter and wander caused data packets is difficult in optical transmission network by using packet structure for exchanging data, an optical data unit dynamic grouping circuit is de signed based on G.709 timing specifications. Asynchronous FIFO is used in the design of the input data cache. According the amount of data in asynchronous FIFO, arbiter calculates the size of grouped data. By using packet generator, the circuit can generate the data packet. Simulation results show that the design can cut the data which takes as input into data packet with the fixed-size of1.