摘要
3GPP组织发布的卫星移动通信标准还停留在3G阶段。对卫星LTE系列标准的研究,如通信协议和流程,常使用网络仿真方式。对EPS系统、开源网络仿真工具NS-3中的LTE仿真模型LENA给出了简要介绍,重点讨论了LENA模型与真实LTE系统的差异,并针对卫星移动通信环境存在大时延、高误码、信道衰落有别于地面等特点,分析和总结了利用LENA模型进行星上LTE系统仿真需要完善之处,为研究和制定卫星LTE移动通信系统标准打下了基础。
The specifications of mobile satellite communication published by the 3GPP organization are still in its 3G stage.For lack of specs,the network simulation is usually used as a key approach to study the protocols,procedures of LTE over satellite.The EPS and LTE simulation model LENA in the NS-3 are briefly described and then the differences between the LENA and the real LTE system are given.After that,with special concerns of the mobile satellite environment（ long link delay, high loss rate, distinguished channel propagation model, etc. ） , the in-depth analysis is given to the guidelines about how to build an LTE over satellite simulation system based on LENA model,which can lay the foundation for studying and establishing LTE mobile satellite system standards.
出处
《无线电通信技术》
2015年第2期15-18,共4页
Radio Communications Technology
基金
国家高技术研究发展项目(863计划)(2012AA01A505)
关键词
LTE
演进分组核心网
网络协议栈
仿真
long term evolution （LTE）
evolved packet core （ EPC ） networks
network protocol stacks
simulation
