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Energy-Efficient Resource Allocation for Small-Cell Networks:A Stable Queue Perspective 被引量:7
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作者 Hongxin Wei Wei Feng +1 位作者 Yunzhou Li Shidong Zhou 《China Communications》 SCIE CSCD 2017年第10期142-150,共9页
The small-cell technology is promising for spectral-efficiency enhancement. However, it usually requires a huge amount of energy consumption. In this paper, queue state information and channel state information are jo... The small-cell technology is promising for spectral-efficiency enhancement. However, it usually requires a huge amount of energy consumption. In this paper, queue state information and channel state information are jointly utilized to minimize the time average of overall energy consumption for a multi-carrier small-cell network, where the inter-cell interference is an intractable problem. Based on the Lyapunov optimization theory, the problem could be solved by dynamically optimizing the problem of user assignment, carrier allocation and power allocation in each time slot. As the optimization problem is NP-hard, we propose a heuristic iteration algorithm to solve it. Numerical results verify that the heuristic algorithm offers an approximate performance as the brute-force algorithm. Moreover, it could bring down the overall energy consumption to different degrees according to the variation of traffic load. Meanwhile, it could achieve the same sum rate as the algorithm which focuses on maximizing system sum rate. 展开更多
关键词 resource allocation small cell queue system sum rate
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A Distributed User Association and Resource Allocation Method in Cache-Enabled Small Cell Networks 被引量:2
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作者 Gongye Ren Hua Qu +2 位作者 Jihong Zhao Shuyuan Zhao Zhirong Luan 《China Communications》 SCIE CSCD 2017年第10期95-107,共13页
Cache-enabled small cell networks have been regarded as a promising approach for network operators to cope with the explosive data traffic growth in future 5 G networks. However, the user association and resource allo... Cache-enabled small cell networks have been regarded as a promising approach for network operators to cope with the explosive data traffic growth in future 5 G networks. However, the user association and resource allocation mechanism has not been thoroughly studied under given content placement situation. In this paper, we formulate the joint optimization problem of user association and resource allocation as a mixed integer nonlinear programming(MINLP) problem aiming at deriving a balance between the total utility of data rates and the total data rates retrieved from caches. To solve this problem, we propose a distributed relaxing-rounding method. Simulation results demonstrate that the distributed relaxing-rounding method outperforms traditional max-SINR method and range-expansion method in terms of both total utility of data rates and total data rates retrieved from caches in practical scenarios. In addition, effects of storage and backhaul capacities on the performance are also studied. 展开更多
关键词 proactive caching user association resource allocation distributed algorithm dual decomposition small cell networks
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Distributed Chunk-Based Optimization for MultiCarrier Ultra-Dense Networks 被引量:2
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作者 GUO Shaozhen XING Chengwen +2 位作者 FEI Zesong ZHOU Gui YAN Xinge 《China Communications》 SCIE CSCD 2016年第1期80-90,共11页
In this paper,a distributed chunkbased optimization algorithm is proposed for the resource allocation in broadband ultra-dense small cell networks.Based on the proposed algorithm,the power and subcarrier allocation pr... In this paper,a distributed chunkbased optimization algorithm is proposed for the resource allocation in broadband ultra-dense small cell networks.Based on the proposed algorithm,the power and subcarrier allocation problems are jointly optimized.In order to make the resource allocation suitable for large scale networks,the optimization problem is decomposed first based on an effective decomposition algorithm named optimal condition decomposition(OCD) algorithm.Furthermore,aiming at reducing implementation complexity,the subcarriers are divided into chunks and are allocated chunk by chunk.The simulation results show that the proposed algorithm achieves more superior performance than uniform power allocation scheme and Lagrange relaxation method,and then the proposed algorithm can strike a balance between the complexity and performance of the multi-carrier Ultra-Dense Networks. 展开更多
关键词 ultra-dense small cell networks optimization chunk power allocation subcarrier allocation distributed resource allocation
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