Availability Analysis and Optimization in CoMP and CA-enabled HetNets
Availability Analysis and Optimization in CoMP and CA-enabled HetNets
复制标题
CoMP 和支持 CA 的 HetNet 中的可用性分析和优化
DOI:
10.1109/tcomm.2017.2679747
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发表时间:
2017-06
影响因子:
8.3
通讯作者:
Arumugam Nallanathan
中科院分区:
文献类型:
--
作者:
Jie Jia;Yansha Deng;Jian Chen;Abdol-Hamid Aghvami;Arumugam Nallanathan
Traditional cellular networks are moving toward heterogeneous cellular networks (HetNets) to satisfy the stringent demand for data rates and capacity. To enable the new applications in 5G, such as haptic communications, we face new challenges of achieving high availability with low latency in HetNets. In this paper, we introduce coordinated multi-point (CoMP) and carrier aggregation (CA) techniques in HetNets to guarantee the availability of all user equipment (UE), where the CoMP improves the single-path availability, and the CA enhances availability via multi-carrier gain combining. To characterize the availability, we first derive an exact closed-form expression for the availability of a random UE in a CoMP and CA-enabled HetNets. To achieve the maximum UE availability, we formulate a max-min optimization problem. To solve it, we then propose a two-step optimization algorithm (TSOA) and a joint (JTOA). The TSOA is based on heuristic algorithm for the optimal subcarrier assignment and UE association, and based on the Lagrangian dual method for the power allocation. The JTOA is based on genetic algorithm to achieve the interaction between the first step and the second step. Our results showcase the effective of our proposed JTOA, and the effective of the CoMP in availability improvement in HetNets.
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DOI:
10.1109/icc.2013.6655410
发表时间:
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期刊:
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发表时间:
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期刊:
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影响因子:
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