卫星光网络的虚拟信道和主信道双重优化数据封装方法  

Data encapsulation optimization of virtual channel and master channel in optical satellite network

作　　者：邓博于 赵尚弘[1] 李勇军[1] 张曦文[1] 程振[1] 

机构地区：[1]空军工程大学信息与导航学院,陕西西安710077

出　　处：《光电子．激光》2015年第7期1288-1293,共6页Journal of Optoelectronics·Laser

基　　金：中国博士后科学基金(2012M512066)资助项目

摘　　要：针对卫星光网络中不同类型、不同速率业务统一封装实现难度大和传输效率低的问题,提出利用虚拟信道(VC)与主信道(MC)联合优化的数据封装方法,分别给出VC封装与MC处理方法,并针对其原理进行分析。在VC中,提出了基于优先级的虚拟信道调度算法,对帧调度的时间冲突进行优化,提高虚拟信道处理的帧复用效率。在MC处理中,对传输帧支持的业务类型进行了扩展,分析了前向纠错编码对帧传输的性能影响。研究结果表明,采用优先级算法后帧传输效率提升24.61%;外码为RS码、内码为卷积码的级联码是MC处理中可选择的最佳编码方式。The diversification of data link layer protocol is increasing with the development of space link in optical satellite network.Data encapsulation can realize the standardized data transmission.A key issue of using efficiency methods to encapsulate different types and different rates data in optical satellite network needs to be solved.A data encapsulation method of virtual channel and master channel joint optimization is proposed to solve the problem of different types and different rates data unification encapsulation in optical satellite network.The methods of virtual channel encapsulation and master channel processing are given,respectively.And their principles are analyzed.The virtual channel scheduling algorithm based on priority is proposed to optimize time conflict of frame scheduling in virtual channel,and to overcome the shortcomings of low efficiency frame multiplexing in virtual processing.The service type of transmission frame is optimized to improve the frame transmission performance,and the influence of forward error correction coding in master channel is analyzed by simulation.The results show that the frame transmission efficiency increases by 24.61%after using priority algorithm and the best coding scheme of master channel processing is the concatenated code of outer code for RS code and internal code for convolution code.

关 键 词：卫星光网络 数据封装 虚拟信道(VC)调度 前向纠错编码 

分 类 号：TN927[电子电信—通信与信息系统]