LTE系统视频业务的调度算法

doi:10.11959/j.issn.1000-0801.2016109

Abstract

Abstract:

Real-time is an important criterion for evaluation of the real-time video traffic. Most of the existing scheduling algorithms have a wide distribution of user time delay. Firstly，based on the analysis of the existing scheduling algorithms and system rate，an algorithm called MT-LWDF was proposed. Secondly，obtained the range of β after the theoretical analysis，the optimal value of β was got by computer simulation. Then，β was set with the optimal value，the simulation relating to average delay of the system，maximum delay of the users，rate of the system，video frame loss rate and other performance was done. And the results indicate that MT-LWDF algorithm can reduce the distribution of user delay at the same time of optimizing the rate of the system.

Key words: LTE, scheduling algorithm, video traffic, simulation

Jiarui DING,Kai LIU,Jie SUN,Zhimin LIU. A scheduling algorithm for optimizing video traffic[J]. Telecommunications Science, 2016, 32(4): 83-91.

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References 12

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参数	分布	设定值
帧开始时间间隔	确定值	100 ms
每个帧的数据分组数	确定值	8
分组大小	截断的Pareto分布	均值100 byte最大值250 byte
分组到达时间间隔	截断的Pareto分布	均值6ms最大值12.5ms

参数	设定值
网络拓扑	六边形蜂窝结构
小区数目/个	7
扇区/小区	3扇区
用户数/扇区	10
场景设置	Uma
信道模型	ITU信道模型
是否加干扰	是
载波频率/GHz	2.4
基站站间距/m	500
用户速度/（km·h^-1）	30
仿真带宽/MHz	10
是否自适应重传	是
时隙配比	DSUUD DSUUD
用户端天线间距	10倍波长
基站天线间距	10倍波长

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A scheduling algorithm for optimizing video traffic

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