摘要
近年来随着空间网络应用的快速发展,临近空间网络逐渐成为新的研究热点。临近空间网络要求信息传输的实时性、有效性,对媒体接入控制(MAC)层协议的设计提出了很高的要求。在按需分配(DAMA)协议的基础上,结合自由分配,提出将混合自由按需分配(CFDAMA)协议应用到临近空间通信网中,并用OPNET仿真软件建立仿真模型。仿真结果表明,与纯DAMA协议相比,CFDAMA协议不仅能极大地降低网络的平均端到端时延,保证信息传输的实时性;而且能提高网络的吞吐量。
The near space network has become the research focus on rapid developing of space network.Near space communication network demands higher real time and effective transmitting messagea,proper medium access control protocol is designed.Based on Demand Assignment Multiple Access(DAMA) protocol,combined with free assignment,Combined Free Demand Assignment Multiple Access(CFDAMA) protocol is applied to near space communication network,OPNET simulation model is created.Simulation results show that not only CFDAMA protocol can reduce mean end-to-end network delay,guarantee the real time of message,but also promote the throughput of network.
出处
《计算机工程与应用》
CSCD
北大核心
2011年第2期68-71,111,共5页
Computer Engineering and Applications
基金
陕西省自然科学基金(No.2007F03)
陕西省电子信息系统综合集成重点实验室项目(No.200902B)~~
关键词
临近空间通信网
按需分配
混合自由按需分配
OPNET软件
时延
near space communication network
Demand Assignment Multiple Access(DAMA)
Combined Free Demand Assignment Multiple Access(CFDAMA)
OPNET
time delay