针对5G网络优化工作中出现的新空口承载语音(Voice over New Radio,VoNR)用户感知差的问题,探讨平均意见评分(Mean Opinion Score,MOS)值影响因素与分析流程,对后续出现的此类问题提供分析思路及具体解决方案。通过对网络现有参数和物...针对5G网络优化工作中出现的新空口承载语音(Voice over New Radio,VoNR)用户感知差的问题,探讨平均意见评分(Mean Opinion Score,MOS)值影响因素与分析流程,对后续出现的此类问题提供分析思路及具体解决方案。通过对网络现有参数和物理参数的核查,修改网络异常参数,以射频优化为基础、以参数优化为辅助,达到快速提升5G VoNR语音用户使用感知的目的。通过采用相应的网络优化手段,有效提升5G网络VoNR接通率,降低5G网络VoNR掉话率。展开更多
A resource allocation protocol is presented in an orthogonal frequency division multiple access （OFDMA） cognitive radio （CR） network with a hybrid model which combines overlay and underlay models. Without disrupti...A resource allocation protocol is presented in an orthogonal frequency division multiple access （OFDMA） cognitive radio （CR） network with a hybrid model which combines overlay and underlay models. Without disrupting the primary user （PU） transmissions, the overlay model allows the secondary user （SU） to utilize opportunistically the idle sub-channels; the underlay model allows the SU to occupy the same sub-channels with PU. The proposed protocols are designed for maximizing the quality of experience （QoE） of CR users and switching dynamically between the overlay and underlay models. QoE is measured by the mean opinion score （MOS） rather than simply fulfilling the physical and medium access control （MAC） layer requirements. The simulations considering the file transfer and video stream services show that the proposed resource allocation strategy is spectrum efficient.展开更多
文摘针对5G网络优化工作中出现的新空口承载语音(Voice over New Radio,VoNR)用户感知差的问题,探讨平均意见评分(Mean Opinion Score,MOS)值影响因素与分析流程,对后续出现的此类问题提供分析思路及具体解决方案。通过对网络现有参数和物理参数的核查,修改网络异常参数,以射频优化为基础、以参数优化为辅助,达到快速提升5G VoNR语音用户使用感知的目的。通过采用相应的网络优化手段,有效提升5G网络VoNR接通率,降低5G网络VoNR掉话率。
文摘提出了一种基于加权巴克谱失真(W BSD)的语音质量客观评价算法。鉴于不同巴克带谱失真对语音质量的影响程度不同,该算法提出在巴克域中对不同巴克带谱失真进行加权来求失真语音的客观失真测度。并且通过分析改进型巴克谱失真测度(M BSD)中15个巴克带失真与平均意见分(M O S)间的相关度,提出了一组以相关系数幂次方为权重的有效巴克谱失真权重矢量。实验结果表明:与M BSD算法相比,W BSD在算法复杂度没有明显增加的情况下与M O S的相关度提高了3%。
基金The National Natural Science Foundation of China(No.61271207,61372104)the Natural Science Foundation of Jiangsu Province(No.BK20130530)+1 种基金the Natural Science Foundation of the Jiangsu Higher Education Institutions of China(No.12KJB510002)the Programs of Senior Talent Foundation of Jiangsu University(No.11JDG130)
文摘A resource allocation protocol is presented in an orthogonal frequency division multiple access （OFDMA） cognitive radio （CR） network with a hybrid model which combines overlay and underlay models. Without disrupting the primary user （PU） transmissions, the overlay model allows the secondary user （SU） to utilize opportunistically the idle sub-channels; the underlay model allows the SU to occupy the same sub-channels with PU. The proposed protocols are designed for maximizing the quality of experience （QoE） of CR users and switching dynamically between the overlay and underlay models. QoE is measured by the mean opinion score （MOS） rather than simply fulfilling the physical and medium access control （MAC） layer requirements. The simulations considering the file transfer and video stream services show that the proposed resource allocation strategy is spectrum efficient.
