Feasibility of LTE-Based GEO Satellite Mobile Communication Systems to Support VoIP for Handheld Terminals  

作　　者：DING Dan GAO Zhen CHENG Naiping 

机构地区：[1]Department of Electronic and Optical Engineering,Space Engineering University,Beijing 101416,China [2]School of Electrical and Information Engineering,Tianjin University,Tianjin 300072,China

出　　处：《Chinese Journal of Electronics》2019年第4期829-834,共6页电子学报（英文版）

基　　金：supported by the National High Technology Research and Development Program of China(863 program)(No.2015AA7026085)

摘　　要：To facilitate the integration of terrestrial and satellite mobile communication systems in the future,the new generation of satellite mobile communication system should be Long-term evolution(LTE)-based.In LTE,voice is carried by Internet protocol(IP)packets(voice over IP,VoIP).The feasibility of LTEbased Geosynchronous earth orbit(GEO)satellite mobile communication systems for Vo IP is discussed.Detailed link budgets are created for typical handheld terminals.The effectiveness of Physical resource block(PRB)bundling and Transmission time interval(TTI)bundling for the capacity improvement of downlink and uplink are evaluated,and further uplink improvement for low level terminals by Narrowband resource block(NRB)scheme is also studied.The analysis results show that the downlink VoIP transmission is mainly power limited,and optimization of PRB or TTI bundling can maximize the capacity.For uplink,only highlevel terminals can support VoIP under the normal LTE frame structure,and TTI bundling and Resource block(RB)block techniques can help the low-level terminals support VoIP transmission.To facilitate the integration of terrestrial and satellite mobile communication systems in the future,the new generation of satellite mobile communication system should be Long-term evolution(LTE)-based.In LTE, voice is carried by Internet protocol(IP)packets(voice over IP, VoIP). The feasibility of LTEbased Geosynchronous earth orbit(GEO) satellite mobile communication systems for Vo IP is discussed. Detailed link budgets are created for typical handheld terminals.The effectiveness of Physical resource block(PRB)bundling and Transmission time interval(TTI) bundling for the capacity improvement of downlink and uplink are evaluated, and further uplink improvement for low level terminals by Narrowband resource block(NRB)scheme is also studied. The analysis results show that the downlink VoIP transmission is mainly power limited, and optimization of PRB or TTI bundling can maximize the capacity. For uplink, only highlevel terminals can support VoIP under the normal LTE frame structure, and TTI bundling and Resource block(RB) block techniques can help the low-level terminals support VoIP transmission.

关 键 词：Satellite mobile communications Geosynchronous earth orbit(GEO) Long-term evolution(LTE) VOICE over internet protocol(VoIP) HANDHELD terminals 

分 类 号：TN[电子电信]