基于Python的DTN仿真平台

Simulation of DTN Platform Based on Python

延迟容忍网络(DTN,Delay Tolerant Networks)是一种新型移动自组织(MANET,Mobile Ad-hoc NETworks)网络,通过"存储-携带-转发"的路由模型实现不存在完整通信链路节点间的通信,对物联网和普适计算有重要意义。由于DTN网络的特殊通信模式导致传统基于TCP/IP体系结构的网络协议无法直接应用于DTN网络,因此现有多数网络仿真器不能直接仿真DTN网络。ONE是一款基于Java的DTN网络仿真器,但是不能提供完整的数据统计分析模块。鉴于Python拥有强大的数据统计分析库和仿真库,设计一个基于Python的DTN网络仿真平台。该平台集成了Python离散事件仿真库SimPy,科学计算库NumPy、SciPy和SymPy,以及图形库PyViz和Matplotlib,为DTN网络仿真提供了完整的仿真平台,包括网络仿真、场景可视化和数据统计分析等功能。

DTN( Delay Tolerant Networks) is a new type of MANET( Mobile Ad hoc NETwork). It can implement the communications between source node and destination node by the "store-carry- forward" routing model, even if there is no complete link between two nodes. So, DTN has important significance for Internet of Things(IoT)and ubiquitous computing. The special communication mode of DTN results that the traditional network protocol based on TCP/IP architecture cannot be directlyapplied to DTN, so most of the existing network simulators cannot directly simulate DTN. ONE written by Java is a networksimulator for DTN, but it cannot provide a complete module of statistic and analysis. In view of Python has a strong statistic,analysis and simulation library, a Python-based network simulation platform for DTN was designed in this paper. The platformintegrates a discrete event simulation library, SimPy, three scientific computing libraries, i.e. NumPy, SciPy and SymPy, two graphics libraries, namely PyViz and Matplotlib. It provides a complete simulation platform for DTN, including the functions of network simulation, visualization, statistic and analysis.