期刊
IEEE TRANSACTIONS ON EMERGING TOPICS IN COMPUTING
卷 6, 期 4, 页码 579-591出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TETC.2016.2598478
关键词
Hybrid fiber-wireless network; FiWi; LTE-A; heterogeneous network; HetNet; energy consumption; UE connection; FiWi enhanced LTE-A HetNet
资金
- National Natural Science Foundation of China [61372073, 61373043, 61202394, 61472367, 61432015]
- China 111 Project [B16037]
- Fundamental Research Funds for the Central Universities [JB150311]
As an integration of optical fiber networks and LTE-A heterogeneous networks (HetNets), fiber-wireless (FiWi) enhanced LTE-A HetNets will play a key role in supporting large-scale mobile data transmission. To improve the energy efficiency of the networks, we should put as much equipment into sleep state, and thus few user equipment (UE) can access Internet. In contrast, to maximize the LIE connection all equipment should be in active state, which results in very high energy consumption. Obviously, there is a tradeoff between energy consumption minimization and UE connection maximization. However, existing works mostly focused on designing energy saving schemes for access networks but little can be found taking UE connection constraints into account. Toward this end, we provide this paper to explore the problem of minimizing energy consumption with UE connection constraints, where a constrained optimization problem is formulated and three solutions are presented, i.e., a brute force algorithm, a heuristic greedy algorithm, and a snowball rolling algorithm. Numerical results reveal that the heuristic greedy and snowball rolling algorithms have much higher computational efficiency than the brute force method. and can also achieve near-optimal solutions for the problem of minimizing energy consumption with UE connection constraints in FiWi enhanced LTE-A HetNets.
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