Framework for Link-Level Energy Efficiency Optimization with Informed Transmitter

By Christian Isheden, Zhijiat Chong, Eduard Axel Jorswieck, Gerhard P. Fettweis. IEEE Transactions on Wireless Communications, 2011

395 citations recorded by the source corpus.

The dramatic increase of network infrastructure comes at the cost of rapidly increasing energy consumption, which makes optimization of energy efficiency (EE) an important topic. Since EE is often modeled as the ratio of rate to power, we present a mathematical framework called fractional programming that provides insight into this class of optimization problems, as well as algorithms for computing the solution. The main idea is that the objective function is transformed to a weighted sum of rate and power. A generic problem formulation for systems dissipating transmit-independent circuit power in addition to transmit-dependent power is presented. We show that a broad class of EE maximization problems can be solved efficiently, provided the rate is a concave function of the transmit power. We elaborate examples of various system models including time-varying parallel channels. Rate functions with an arbitrary discrete modulation scheme are also treated. The examples considered lead to water-filling solutions, but these are different from the dual problems of power minimization under rate constraints and rate maximization under power constraints, respectively, because the constraints need not be active. We also demonstrate that if the solution to a rate maximization problem is known, it can be utilized to reduce the EE problem into a one-dimensional convex problem.

View Paper: https://www.semanticscholar.org/paper/c1ad9c989cb227962eba628ac7db05a1cd91150b

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Citations in the corpus

A Survey of Energy-Efficient Techniques for 5G Networks and Challenges Ahead (2016, background): “This measure has been considered recently in [18] and [21], which focused mainly on multi-carrier systems.”
Energy Efficiency in Wireless Networks via Fractional Programming Theory (2015, background): “Since then, fractional programming has been largely used in the field of energyefficient optimization of wireless systems, and some fractional programming methods and applications are outlined in [84].”
Wireless Information and Power Transfer: Energy Efficiency Optimization in OFDMA Systems (2013, unknown): “Besides, the high power consumption in electronic circuitries and RF transmission have been overlooked in [10]– [14] but play an important role in designing energy efficient communication systems [15], [16].”
Throughput Optimal Policies for Energy Harvesting Wireless Transmitters with Non-Ideal Circuit Power (2012, background): “In practice, β is generally much smaller as compared to α and thus can be ignored for simplicity [5], [7], [8].”