QoE感知的FiWi视频分发机制

doi:10.11959/j.issn.1000-436x.2018012

Abstract

Abstract:

The mismatch of transmission ability causes the discontinuous transmission of video services in fiber-wireless access network,aimed at this problem,an QoE-aware video distribution mechanism was proposed.According to the structural characteristics of fiber-wireless access network,link state information and scalable video coding structure was considered,a QoE evaluation mode was established,and the particle swarm optimization algorithm was used to select optimal video transmission rate.Then the node transmission capacity and the node matching degree was analyzed,transmission path for the services was selected,so as to ensure the reliable transmission of services.The results show that the proposed mechanism can effectively improve the utilization rate of network resources and reduce network congestion while improving the quality of the user experience.

Key words: fiber-wireless access network, scalable video coding, quality of experience, particle swarm algorithm

CLC Number:

TP393.04

Ruyan WANG,Yan YANG,Dapeng WU. QoE-aware video distribution mechanism in FiWi[J]. Journal on Communications, 2018, 39(1): 1-13.

Figures/Tables 12

References 20

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符号	意义
SINR_i,k	链路i中第k层信噪比
BW _k	第k层业务所需带宽
r_k	第k层业务发送速率
ζ_k	第k层业务分组丢失率
Data_avg	平均接收速率
TH_frag	链路分配阈值
S_k	第k层业务成功概率
PL_avg	平均播放速率
C	视频播放门限
?	视频中断门限
Buff _T	中断缓存时间
Play _T	平均播放时间
BR	中断缓存率
r	用户请求速率

参数设定	参数值
网络区域	500 m×500 m
OLT数量/个	1
ONU-BS数量/个	8
种群规模/个	20
迭代次数	40
惯性权重μ	0.5
加速因子τ₁、τ₂	2、2
调节因子α、β	0.8、400

层数	分辨率	帧速率/(fbit·s^?1)	比特率/(kbit·s^?1)
0	700×500	30	1 177
1	700×500	30	1 479
2	700×500	30	2 845
3	700×500	30	5 103

QoE-aware video distribution mechanism in FiWi

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