Power-optimal scheduling for a Green Base station with delay constraints

Power management in heterogeneous networks with energy harvesting base stations

“…Besides, intelligently operating energy harvesting BSs in HCNs related to power saving has also received considerable interest [15]- [24]. A new tractable model for K-tier HCNs is developed in [15], where each BS is powered solely by a self-contained energy harvesting module.…”

“…Authors in [23] study resource allocation algorithm design for energy-efficient communication in an orthogonal frequency division multiple access (OFDMA) downlink network with hybrid energy harvesting BS. A power optimization problem with average delay constraint on the downlink of a Green Base station is considered in [24]. This Green BS is powered by both renewable energy as well as conventional sources like diesel generators or the power grid.…”

Efficient low complexity power allocation policies for wireless communication systems guaranteeing QoS

“…Also, as before we assume that the energy is spent only in transmission and energy buffer is infinite. Various generalizations to energy spent on other activities and battery leakage can be taken into account as in [13] and due to space limitations we ignore them in this paper. Now the problem is to minimize (4a) but instead of (4b), the constraint at time k is P k ≤ E k .…”

“…Existence of an optimal policy for this problem has been proved in [13]. However, there is no closed form solution and it is computationally very complex to obtain the optimal policy.…”

“…which ensure stability or satisfy mean delay constraints when power is a linear/general function of rate. In [13] existence and structural results are proved for optimal power policies which satisfy certain mean delay constraints. [5] proposed an energy efficient scheduling policy with individual packet delay constraints.…”