OBS边缘节点接收设备的研究  

Research of Receiving Equipment in Edge Node of OBS

作　　者：谢军[1] 胡钢[1] 李兴明[1] 

机构地区：[1]电子科技大学宽带光纤传输与通信网技术教育部重点实验室,成都610054

出　　处：《电信科学》2005年第9期13-15,共3页Telecommunications Science

基　　金：国家"863"计划资助项目(No.2002AA122021)

摘　　要：光突发交换(OBS)网络边缘节点的接收设备具有与普通光网络接收设备不同的要求和特点。首先,光突发接收要求有快速的信号同步时间,以减少前导字节所占用的开销;其次,特有的帧结构要求有相应的解封装操作和业务数据的快速交换能力。本文设计和测试了光突发接收电路,同时利用大容量FPGA完成了信号的解封装和IP数据的快速交换,并以此开发了OBS边缘节点接收设备,在系统测试中证明该设备符合光突发交换系统的要求。The receiving equipment in the edge node of OBS had different requirements from normal optical network receiver, burst optical dataflow need to be received in short time for the sake of less preamble code. The quick synchronization process was needed in the data recover circuit. The disassemble process was need because of the special frame of burst data. The fast switching structure was needed for the client payload. The research and test of burst receiving circuit was made. Disassembling and switching functions were realized in a FPGA. The function and performance was tested in the OBS system.

关 键 词：光突发交换 同步 交换结构 接收设备 边缘节点 OBS 光突发交换 系统测试 同步时间 突发接收 接收电路 交换能力 

分 类 号：TN948.55[电子电信—信号与信息处理] TN929.11[电子电信—信息与通信工程]