多用户MIMO-OFDM系统基于QoE效用函数的跨层资源分配

doi:10.3969/j.issn.1000-436x.2014.09.018

Abstract

Abstract:

Resource allocation problem was investigated for downlink multi-user MIMO-OFDM systems.A QoE (quality of experience) utility function was given according to the characteristics of real-time (RT) and non real-time (NRT) ser-vices,and then a RT & NRT QoE utility function-based cross-layer resource allocation algorithm was proposed.The al-gorithm firstly used the designed utility function to calculate the delta QoE,which was offered by users got resource.Secondly,it classified users according to their delta QoE and then allocated time-frequency blocks.Thirdly,it optimized the power allocation result by implementing pseudo water flooding power allocation.Simulation results show that com-pared with the existing algorithm,the proposed algorithm is better in the user average QoE,average packet delay to real time services,average packet lost rate to non real time services as well as sum throughput of system.

Key words: multi-user, MIMO-OFDM, resource allocation, cross-layer, QoE utility function

Da-ming WANG,Song CHEN,Wei-jia CUI,Qiang WANG. QoE utility function-based cross-layer resource allocation in multi-user MIMO-OFDM systems[J]. Journal on Communications, 2014, 35(9): 175-183.

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References 18

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MOS区间	用户感受
1,2)	几乎所有用户不满意
2,3)	多数用户不满意
3,4)	部分用户不满意
4,5]	几乎所有用户满意

T_r/ms	R
25	92
75	90
125	86
175	80
225	74
275	68

T₁	MOS
0.05	4.38
0.15	4.34
0.25	4.22
0.35	4.02
0.45	3.78
0.55	3.50

类型	数据分组大小/kB	平均到达数/(个·s^?1)	业务速率/(kB·s^?1)
VoIP	0.512	20	10
Video	1	20	20

QoE utility function-based cross-layer resource allocation in multi-user MIMO-OFDM systems

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