IP over CCSDS协议适配的高速并行实现技术  

Technology of Parallel High Speed IP over CCSDS Protocol Adaptation

作　　者：李少宾[1] 白海斌[1] 张亚生[1] 

机构地区：[1]中国电子科技集团公司第五十四研究所,石家庄050081

出　　处：《飞行器测控学报》2013年第5期432-437,共6页Journal of Spacecraft TT&C Technology

摘　　要：天地一体化组网应用须在空间网和地面网之间部署IP over CCSDS(基于CCSDS空间链路承载IP业务)协议适配网关,以实现在高速CCSDS(空间数据系统咨询委员会)空间链路之上传输IP(互联网协议)数据包。针对此需求,提出一种IP over CCSDS协议适配的高速并行实现方法,并在Linux内核中采用多线程技术实现IP over CCSDS协议适配过程,通过实验进行测试与验证。测试表明,在处理器多核数目的范围内,协议适配处理性能随线程并发数目的增加而增加;当线程数目超过处理器核数时,受限于处理器核数和线程调度开销的影响,协议适配的性能并不能随着线程数目的增多而线性增加。后续,可利用FPGA(现场可编程门阵列)硬件逻辑电路的并行能力在硬件上实现协议适配的高速并行处理,并设计更高速率的同步接口,以从硬件上实现几千兆比特甚至几十千兆比特的高速IP over CCSDS协议适配。IP over CCSDS （Consultative Committee for Space Data Systems） protocol adaptation gateways are de ployed for transferring 1P （Internet Protocol） data packets through high speed CCSDS space links in space-ground integrated networking applications. A new parallel IP over CCSDS protocol adaptation method is presented in this paper and multithreading implementation of IP over CCSDS in Linux kernel is given. Test and verification shows the performance of protocol adaptation increases with the increase of the number of parallel threads when the number of parallel threads is within the range of the number of processor cores; the performance of protocol adaptation is not directly proportional to the number of threads due to limit of the number of processor cores and overhead of thread scheduling when the number of parallel threads exceeds the range of the number of processor cores. For multi-giga- bits and tens of gigabits high speed IP over CCSDS protocol adaptation, high speed parallel protocol adaptation im- plemented in hardware and design of higher speed synchronous interfaces are needed by using the parallel processing capability of FPGA （Field Programmable Gate Array） lolic circuits.

关 键 词：空间数据系统咨询委员会(CCSDS) 基于CCSDS空间链路承载IP业务(IP OVER CCSDS) 协议适配 多线程 

分 类 号：V57[航空宇航科学与技术—航空宇航推进理论与工程] TN915.04[电子电信—通信与信息系统]