异构网络中两种边缘缓存策略的能耗分析

doi:10.11959/j.issn.1000-0801.2018035

Abstract

Abstract:

The energy consumption of a two-tier heterogeneous network under two different caching strategies was analyzed.Firstly,the energy consumption of each network components was modelled,and the relationship between the energy consumption of heterogeneous networks and the distribution density of small cell,user load per cell and caching capacity was investigated.The simulation results show that edge caching can effectively reduce the energy consumption of heterogeneous networks and the performance of the two caching strategies are different under different density of small base station and user load.Specifically,the energy consumption of both the network and per user under the two caching strategies are reduced with the increase of the density of small base station and the user load per cell,respectively.Furthermore,the influence of small base station’s caching capacity can not be neglected in total energy consumption.

Key words: heterogeneous network, edge caching, energy consumption, homogeneous Poisson point process

CLC Number:

TN929.5

Yi SUN,Hong WANG,Rongfang SONG. Analysis of energy consumption of two kinds of edge caching strategies in heterogeneous networks[J]. Telecommunications Science, 2018, 34(1): 17-26.

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References 18

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参数	物理意义	取值
R_m	MBS服务半径/m	300
R_s	SBS服务半径/m	15
N_f	服务器中视频文件总数	20 000
N_m	MBS缓存大小	5 000
N_s	SBS缓存大小	1 000
P_m	MBS发送功率/W	20
P_s	SBS发送功率/W	0.1
N_a	加性高斯白噪声功率/dBm	110
Γ_s	SBS中断SINR阈值/dB	0
Γ_m	MBS中断SINR阈值/dB	0
v	文件流行分布成形系数	0.8
N_B	一个视频文件所包含的数据分组数	1 000
F	一个视频文件大小/bit	10⁷
α	衰减指数	4
e_m	MBS发送1 bit能耗/(J·bit^-1)	10^-8
e_s	SBS发送1 bit能耗/(J·bit^-1)	5×10^-10
e_ba	回传链路传输1 bit的能耗/(J·bit^-1)	10^-8
e_c	缓存器缓存1 bit能耗/(J·bit^-1)	10^-10
U	异构网络服务的总用户数	10 000
U_s	SBS用户负载	140

Analysis of energy consumption of two kinds of edge caching strategies in heterogeneous networks

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