LTE无线网络虚拟化中切片调度策略

doi:10.11959/j.issn.1000-0801.2017041

Abstract

Abstract:

The future mobile communication network slicing mechanism was studied.A slice scheduler of flow level in medium access control (MAC) layer within the base station was used to utilize the shared resources between operators by predetermined proportion in the downlink LTE system.According to the different service level agreement parameters,the wireless resources are allocated for operators,which is the owner of slices in wireless network virtualization.System level simulation experiment and the comparison of the utilization between different slice methods were carried out.Compared to fixed slice method,the NVS method ensures that the users in different slices can achieve better utilization of wireless resources.In addition,the slices for services were established according to the difference of real-time(RT)and non-real-time(NRT)traffic requests,which minimizes the packet loss rate and ensures performance of the whole system.

Key words: network slice, virtualization technology, resource allocation

CLC Number:

TN915

Xiaodan PANG,Weiwei LI,Qian SUN,Lin TIAN. Slice scheduling strategy in LTE wireless network virtualization[J]. Telecommunications Science, 2017, 33(2): 66-72.

Figures/Tables 10

参数类型		设置
仿真场景		3GPP case1
载频		2 GHz
带宽		10 MHz
小区布置		六边形小区，19个宏基站，每个宏基站覆盖三扇区模型
基站间距离（ISD）		500 m
路径损耗		L=128.1+37.6lgR,R单位为km
速度		3 km/h
阴影衰落标准差		8 dB
阴影衰落相关距离		50 m
阴影衰落相关系数	小区间	0.5
	扇区间	1.0
天线模型		$A_{H} (φ) = - \min [12 {(\frac{φ}{φ_{3 d B}})}^{2}, A_{m}]$
		φ_3dB=70°,A_m=20 dB
信道模型		TU信道
基站总功率		46 dBm
用户分布		均匀撒点
UE和BS最小距离		≥35 m

References 21

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MNO切片	切片类型
MNO切片	固定	NVS
切片1	RB数目编号1~35	SLA1参数为0.7
切片2	RB数目编号36~50	SLA2参数为0.3

MNO切片		设置类型
MNO切片	用户业务情况	切片调度策略
切片1（NRT）	FTP业务	策略1:PF
		策略2:PF
		策略3:M-LWDF
切片2（RT）	视频流业务	策略1:M-LWDF
		策略2:PF
		策略3:M-LWDF

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Slice scheduling strategy in LTE wireless network virtualization

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