摘要
同步卫星移动通信的传播时延约260 ms,远高于地面移动通信系统,系统设计面临诸多挑战,特别是实时话音业务的用户体验难以改善。文中提出了一种基于长期演进(LTE)技术体制的T2T通信技术方案,实现地面移动站间经过卫星单跳通信。特点在于移动站以TDM方式复用信道资源,星上仅需实现模拟中继转发,由T2T功能实体与地面信关站配合完成T2T会话管理、星上射频资源和无线资源的动态调度。经地面等比试验系统验证,可显著降低移动站间实时话音业务的传输时延,提升用户体验。
Different from terrestrial cellular communication systems,the GEO( Geosynchronous Orbit)satellite-based cellular communication system has much longer wireless propagation delay,i. e. about 260 ms. It brings many challenges for the system design,especially for the end-user experience improvement of real-time voice service. A novel method for Terminal-to-Terminal mode communication based on LTE technique is proposed for realization of single-hop communication via GEO stationary satellite between terrestrial MSs( Mobile Stations). The innovations include that the mobile station maintains both LTE and T2T radio connections by means of TDM,i. e. multiplexing radio resources in time domain,merely AF( Analog Forwarding) function needs to be implemented on satellite,and T2T function entity coordinates with gateway station for T2T session management,dynamic allocation and scheduling of satellite RF and radio resources. The method was testified that the transmission delay of real-time voice service between MSs was significantly reduced via testbed system where the space-earth channel was equivalently emulated.
作者
刘为
王琳
温文坤
闵铁锐
唐瑞波
宋怡昕
容琪龙
LIU Wei;WANG Lin;WEN Wen-kun;MIN Tie-rui;TANG Rui-bo;SONG Yi-xin;RONG Qi-long(Advanced Mobile Communication Innovation Center of China Electronics Technology Group Corporation,Shanghai,200331,China;The 7th Research Institution of China Electronics Technology Group Corporation,Guangzhou 510310,China;Guangzhou Techphant Co.Ltd.,Guangzhou 510310,China)
出处
《中国电子科学研究院学报》
北大核心
2021年第4期374-385,共12页
Journal of China Academy of Electronics and Information Technology
基金
民用航天“十三五”技术预先研究项目(D040202)。
关键词
移动通信
卫星通信
移动站到移动站模式
长期演进
无线通信系统
mobile communication
satellite communication
terminal to terminal mode
long term evolution
wireless communication system
