摘要
4口155 M异步传送模式(asynchronous transfer mode,ATM)业务采集卡实现对4个155 M ATM overSDH/SONET接口的数据采集,基于大容量FPGA(field programmable gate array)实现AAL2/AAL5的线速信元重组,重组后生成的AAL2SSSAR-SDU/AAL5 CPCS-SDU加上时间戳、ATM通道标识后,封装成以太网报文,通过采集输出口输出给信令协议分析服务器,可实现对Iu-CS、Iu-PS接口的信令监测,同时支持cell mode的采集应用.
The 155M ATM acquisition platform,which has 4 input ports,can realize data acquisition through overSDH/ SONET interface.It deals with ATM segmentation and reassembly（SAR） based on high-capacity FPGA.After the SAR process,the data stream becomes AAL2 SSSAR-SDU/AAL5 CPCS-SDU.FPGA packs the raw data steam with time stamp and ATM channel mark,then generates Ethernet packet.The Ethernet packet is transmitted into PC server,which is used to analyze Iu-CS and Iu-PS interfaces to realize signaling monitoring.The ATM acquisition platform assists cell mode at the same time.
出处
《应用科技》
CAS
2011年第6期54-57,共4页
Applied Science and Technology
基金
GT3000采集平台基金资助项目
关键词
ATM
信元重组
FPGA
信令监测
ATM
segmentation and reassembly
FPGA
signaling monitoring
