Mobile Networks and Applications

, Volume 20, Issue 6, pp 802–816 | Cite as

Context-Aware User Association for Energy Cost Saving in a Green Heterogeneous Network with Hybrid Energy Supplies



In this paper, we study the user association problem to minimize the total energy cost for a green heterogeneous network with hybrid energy supplies. The power consumption of a BS in both the access network and the backhaul links are modeled. We formulate a constrained total energy cost minimization problem, which is generally hard to tackle. We propose a centralized algorithm that exploits the available context-aware information of the network, including the network architecture knowledge, users’ data requirements, and available green energy, to find a feasible and near-optimal solution. Since it is difficult to collect all information in a heterogeneous network, we also propose a distributed algorithm based on the available context-aware information of each BS’s own. Simulations are used to compare our algorithms with the maximum channel gain (MCG) algorithm and the max-RSRP algorithm. Results demonstrate that the proposed context-aware user association algorithms can significantly reduce the total energy cost.


User association algorithm Heterogeneous cellular network Green energy Wireless backhaul Energy cost saving Context-aware 



This work is supported by National Natural Science Foundation of China (Grant No: 61371141) and the Fundamental Research Funds for the Central Universities (No. HUST2015QN081).


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Copyright information

© Springer Science+Business Media New York 2015

Authors and Affiliations

  1. 1.School of Electronic Information and CommunicationsHuazhong University of Science and Technology (HUST)WuhanChina
  2. 2.School of Computer Science and TechnologyHuazhong University of Science and Technology (HUST)WuhanChina
  3. 3.Department of Computer ScienceSt. Francis Xavier UniversityAntigonishCanada

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