摘要
TD-LTE语音解决方案主要有双待机、CSFB、VoLTE等。双待机的原理为在手机内置两个多模收/发模块,使手机同时驻留在2G/3G和TD-LTE网络,数据业务优先通过TD-LTE网络提供,若无LTE覆盖,则由2G/3G网络提供,语音业务则通过2G/3G网络提供。CSFB的原理为终端在LTE网络驻留,使用CS语音回退技术将TD-LTE网络语音服务转移至传统的2G/3G网络,通话结束后再返回到TD-LTE网络。VoLTE作为TD-LTE的最终语音解决方案,以Vo IP的方式通过LTE的分组域来传输语音业务相关数据包,直接使用TD-LTE网络来承载语音业务。
Now TD-LTE voice solution includes double standby terminal, CSFB and VoLTE. The principle of double standby terminal is to set two multi-modemodules to let the phone standby in 2G/3G and TD-LTE network at the same time. The voice service is provided by 2G/3G network, and the data service is provided by TD-LTE network. If there is no TD-LTE network, the data service is provided by 2G/3G network. The principle of CSFB is that terminals standby in TD-LTE network, and use CS fallback technology to transfer the voice service from LTE network to 2G/3G network, then return back to TD-LTE network after the communication is over. To be the ultimate voice solution, VoLTE provides the voice service by TD-LTE network. It uses Vo IP mode to transmit the data package of voice service through LTE PS domain.
出处
《邢台职业技术学院学报》
2015年第5期78-80,共3页
Journal of Xingtai Polytechnic College
