通信光传送网子载波比特分配算法研究  

Research on Subcarrier Bit Allocation Algorithm in Optical Communication Transmission Network

作　　者：万剑锋 WAN Jian-feng(Electronic Information School,Beihai Campus of Guilin University of Electronic Technology,Beihai Guangxi 536000,China)

机构地区：[1]桂林电子科技大学北海校区电子信息学院,广西北海536000

出　　处：《计算机仿真》2020年第12期131-134,203,共5页Computer Simulation

摘　　要：在通信光传送网络中,由于参数的限制,影响子载波分配实时性,系统发射功率较高。为此提出通信光传送网子载波比特分配算法,采用自下而上的方式建立宽带参数信道模型,运用该模型描述信道传输特性,计算光功率损耗的最大允许距离,并分析光传送网络拓扑形式。为避免不同用户之间相互干扰,结合计算与分析结果确定分配约束条件,利用匈牙利算法构建代价矩阵对子载波做初始分配。使用多用户比特分配法经过自适应调制对用户子载波比特数进行动态分配。根据注水原理对分配结果做进一步优化调整。仿真结果表明,所设计方法分配步骤简便,在符合传输效率的要求下可以有效减少系统发射总功率。In the optical transmission network,the limitation for the parameters influences the real-time per-formance of subcarrier allocation,and the system transmission power is too high.Therefore,an algorithm of subcarri-er bit allocation in optical transmission network was put forward.A parametric channel model of broadband was built from the bottom up,and then the model was used to describe the channel transmission characteristics and calculate the maximum allowable distance of optical power loss.Meanwhile,the topological form of optical transport network was analyzed.In order to avoid mutual interference between users,the calculation result was combined with analysis result to determine the allocation constraints.Moreover,Hungarian algorithm was used to construct a cost matrix to preliminarily allocate subcarriers.The multi-user bit allocation method was used to dynamically allocate the number of user's subcarrier bits.According to the water falling principle,the distribution results were further optimized and adjusted.Simulation results show that the designed method has simple steps,so it can effectively reduce the total transmission power of the system in line with the requirements of transmission efficiency.

关 键 词：通信光传送网络 子载波 比特分配 匈牙利算法 注水原理 宽带参数信道模型 

分 类 号：TP915[自动化与计算机技术]