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This paper formulates a joint base station operation and user association optimization problem in the cloud based heterogeneous cellular networks with hybrid energy sources, where all the base stations are connected to the cloud computing center and powered by both on-grid power and renewable energy. The combinatorial optimization problem is decomposed into two subproblems based on the time scale...
Base station (BS) sleeping has been proved to be an effective technique for saving energy consumption in cellular networks. However, BSs in sleeping mode might cause coverage holes, which have a negative impact on the connectivity of the network. In order to overcome this problem, we propose a combined coordinated multi-point (CoMP) transmission and BS sleeping scheme under the heterogeneous networks...
The access point sleeping scheme is an efficiency method for power saving in the cellular networks. This paper proposes a QoS-aware adaptive access point sleeping scheme designed for energy efficiency in the relay cellular networks. To achieve the best tradeoff between QoS guarantee of users and the power saving of the network, the optimization problem of the access point selection for each user is...
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