航空自组网STDMA时隙分配算法的设计与实现  

Design and Implementation of STDMA Slot Allocation Algorithm for Aeronautical Ad Hoc Networks

作　　者：李杰[1] 宫二玲[1] 孙志强[1] 刘伟[1] 谢红卫[1] 

机构地区：[1]国防科学技术大学机电工程与自动化学院,湖南长沙410073

出　　处：《航空学报》2014年第12期3371-3383,共13页Acta Aeronautica et Astronautica Sinica

摘　　要：航空自组网(AANET)是一种节点高速运动、网络拓扑持续快速变化的新型自组织网络。针对AANET的特点,提出了一种新的时分多址(TDMA)时隙分配方法。首先,根据高动态航空网络环境中媒体访问控制(MAC)协议的特点,推导出可以共用一个时隙进行通信的连接集合的计算方法,并建立了面向连接的空间复用TDMA(STDMA)时隙分配优化数学模型。然后,提出一种分布式STDMA时隙分配算法IDTA。IDTA不需要中心节点收集网络信息,分为2个同步的进程在发送节点和接收节点同时运行,而且能够根据连接的优先级按需分配时隙。最后,在OMNeT++仿真平台上建立计算机仿真模型,仿真结果显示:IDTA比其他分布式STDMA时隙分配算法更加适用于高动态的航空网络环境。In this article,a new distributed approach for scheduling in time division multiple access （TDMA） is proposed for aeronautical ad hoc network （AANET）.AANET is a new sort of ad hoc networks whose nodes move fleetly and the corresponding topology changes rapidly.First,considering features of medium access control （MAC） protocols in the highly-dynamic aeronautical environment,we describe the criteria for a set of links to be able to transmit simultaneously with low interference lever at the receiving nodes and formulate the link-based optimal time slot assignment problem in spatial reuse TDMA （STDMA） with the goal of minimizing the average packet delay in the network.Then,we describe a new distributed approach for time slot assignment,named interference-based distributed TDMA algorithm （IDTA）.Without the central control node,IDTA is divided into two processes at the sender and receiver respectively for a link and assigns the links with capacity proportional to their traffic load.Finally,a computer simulation model is implemented on the OMNeT＋ ＋ platform and the result shows that IDTA is more suitable for the highly-dynamic aeronautical environment than other distributed STDMA algorithms.

关 键 词：自组织网络 媒体访问控制 时分多址 网络协议 计算机仿真 

分 类 号：V243[航空宇航科学与技术—飞行器设计] TN919[电子电信—通信与信息系统]