移动中继多播场景下的节能优化

doi:10.11959/j.issn.1000-0801.2015109

Abstract

Abstract:

Device-to-device（D2D）communication enables direct data transmission between mobile terminals（MT）in proximity by reusing the frequency of traditional cellular network.It is capable to improve individual quality of service（QoS）,reduce MT's energy consumption and expand cell coverage.Particularly,when multiple MT request the same content of service at cell edge,some MT in their vicinity could relay the data to them by means of D2D multicast transmission.However,due to the limited battery lifetime of MT and spectral reusing between D2D and cellular communications,relay node selection and power control are two key techniques needed to be addressed.A particle swarm optimization based scheme to minimize the sum power consumption of mobile relays while guarantee the individual QoS requirement by incorporating both relay node selection and power control was proposed.The efficacy of our scheme was extensively verified through numerical results.

Key words: mobile relay, D2D multicast, energy saving, quality of service, relay node selection, power contro1, particle swarm optimization

Jihong Zhao,Yuan Wang,Rui Tang,Zhenwei Zhang,Hua Qu. Energy Saving Optimization for Mobile Relays in Multicast Transmission Underlying Cellular Network[J]. Telecommunications Science, 2015, 31(4): 71-76.

Figures/Tables 9

References 8

1	3GPP TR36.836 V2.0.2. Mobile Relay for E-UTRA, 2013
2	Yaacoub E , Ghazzai H , Alouini M S , et al. Achieving energy efficiency in LTE with joint D2D communications and green networking techniques. Proceedings of IEEE the 9th International Wireless Communications and Mobile Computing Conference, Sardinia,Italy, 2013:270～275
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参数	设置
小区半径	300 m
天线模型	全向型
天线增益	BS/用户：14/0 dB
功率限制	CU/DU:23/17 dBm
CU发射功率	min｛P^C_max,P₀+1g M+α.HL｝（开环部分功率控制）
噪声的功率谱密度	-174 dBm/Hz
噪声系数	用户/BS:9/5 dB
信道带宽	180 kHz
蜂窝链路和 D2D	PL_c=128.1+37.61g（d[km]）
链路路径损耗模型	PL_d=148.0+40.01g（d[km]）

DR的下标	1	2	3	4	5	6	7
候选RU集合	6	2	6	3,4	4,5	[]	6
贪婪算法接入RU下标	6	2	6	3	5	[]	6
本算法接入RU下标	6	2	6	4	4	[]	6

RU下标	贪婪算法对应RU功耗/mW	本算法对应RU功耗/mW
2	0.489 3	0.489 3
3	15.503 9	0
4	0	29.135 6
5	20.786 0	0
6	17.109 0	17.109 0
总的功耗/mW	53.888 2	46.733 9

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Energy Saving Optimization for Mobile Relays in Multicast Transmission Underlying Cellular Network

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