在LTE网络大规模部署的现阶段,4G用户规模和业务量持续攀高,4G手机渗透率迅速提升,而语音业务作为运营商重要的收入来源,其重要性不言而喻。针对LTE的语音终极实现方案VoLTE(Voice over LTE),研究了实现VoLTE的关键技术,分析了影响语音...在LTE网络大规模部署的现阶段,4G用户规模和业务量持续攀高,4G手机渗透率迅速提升,而语音业务作为运营商重要的收入来源,其重要性不言而喻。针对LTE的语音终极实现方案VoLTE(Voice over LTE),研究了实现VoLTE的关键技术,分析了影响语音质量的多种因素,提出了一种基于E-model的VoLTE语音性能评估方法,在LTE网络率先部署的密集城区场景中,基于不同网络配置和并发用户数,对VoLTE业务性能进行仿真,并采用E模型进行语音质量分析,最终实现对VoLTE的语音性能评估。展开更多
语音业务是无线通信网络的基本需求,5G网络的目标语音解决方案即新空口承载语音(voice over new radio,VoNR)作为5G网络解决语音需求的终极目标,具有低时延、高清语音质量的优势。考虑到5G小区覆盖边缘有可能会导致VoNR语音质差甚至掉话...语音业务是无线通信网络的基本需求,5G网络的目标语音解决方案即新空口承载语音(voice over new radio,VoNR)作为5G网络解决语音需求的终极目标,具有低时延、高清语音质量的优势。考虑到5G小区覆盖边缘有可能会导致VoNR语音质差甚至掉话,因此,为了保证语音通话的连续性与稳定性,需将正在进行的VoNR通话切换到4G长期演进语音承载(voice over long term evolution,VoLTE)。对VoNR网络的语音性能及在弱场时的逃生方案进行深入探究,并提出相应的解决方案,充分发挥出VoNR的技术优势。展开更多
The measuring instrument which uses Sunplus SPCE061A MCU as the controller is a practical intelligent household heart rate meter.It can serve all people timely and effectively to detect the heart rate.It rings some vo...The measuring instrument which uses Sunplus SPCE061A MCU as the controller is a practical intelligent household heart rate meter.It can serve all people timely and effectively to detect the heart rate.It rings some voice alarm if the HRV is abnormal.Then it is decided whether to see a doctor at a convenient time for further diagnosis.The instrument has a feature of voice guidance that can save keyboard steps,which extends the scope of use.All people,old and young,the blind and the deaf,can use it by themselves.展开更多
文摘在LTE网络大规模部署的现阶段,4G用户规模和业务量持续攀高,4G手机渗透率迅速提升,而语音业务作为运营商重要的收入来源,其重要性不言而喻。针对LTE的语音终极实现方案VoLTE(Voice over LTE),研究了实现VoLTE的关键技术,分析了影响语音质量的多种因素,提出了一种基于E-model的VoLTE语音性能评估方法,在LTE网络率先部署的密集城区场景中,基于不同网络配置和并发用户数,对VoLTE业务性能进行仿真,并采用E模型进行语音质量分析,最终实现对VoLTE的语音性能评估。
文摘语音业务是无线通信网络的基本需求,5G网络的目标语音解决方案即新空口承载语音(voice over new radio,VoNR)作为5G网络解决语音需求的终极目标,具有低时延、高清语音质量的优势。考虑到5G小区覆盖边缘有可能会导致VoNR语音质差甚至掉话,因此,为了保证语音通话的连续性与稳定性,需将正在进行的VoNR通话切换到4G长期演进语音承载(voice over long term evolution,VoLTE)。对VoNR网络的语音性能及在弱场时的逃生方案进行深入探究,并提出相应的解决方案,充分发挥出VoNR的技术优势。
基金supported by the National Nature Science Foundation of China(60804034)Nature Science Foundation of Shandong Province(ZR2009GQ006)+3 种基金the Project of Science and Technology of Qingdao Economic and Technological Development Area(2009-2-39)"Taishan Scholarship"Construction Engineering,Innovation Project Special Fund for PostDoctors of Shandong Province(201002028)SDUST Research Fund(2010KYJQ105)the Project of Shandong Province Higher Educational Science and Technology Program(J11LG53)
文摘The measuring instrument which uses Sunplus SPCE061A MCU as the controller is a practical intelligent household heart rate meter.It can serve all people timely and effectively to detect the heart rate.It rings some voice alarm if the HRV is abnormal.Then it is decided whether to see a doctor at a convenient time for further diagnosis.The instrument has a feature of voice guidance that can save keyboard steps,which extends the scope of use.All people,old and young,the blind and the deaf,can use it by themselves.