Publica
Hier finden Sie wissenschaftliche Publikationen aus den FraunhoferInstituten. Activation of nomadic relay nodes in dynamic interference environment for energy saving
 Institute of Electrical and Electronics Engineers IEEE; IEEE Communications Society: IEEE Global Communications Conference, GLOBECOM 2014. Vol.6 : Austin, Texas, USA, 8  12 December 2014 Piscataway, NJ: IEEE, 2014 ISBN: 9781479935130 ISBN: 9781479935123 ISBN: 9781479935116 pp.44664471 
 Global Communications Conference (GLOBECOM) <2014, Austin/Tex.> 

 English 
 Conference Paper 
 Fraunhofer HHI () 
Abstract
This paper presents an optimization framework for energy savings in nomadic relay networks, where interference and load are changing over time due to varying assignments. We prove the existence of an explicit load function taking assignments as arguments and we show the function is continuously differentiable. Based on the properties of the load function, we design iterative relay and user association algorithm for energy savings, where the nonconvex load constraints are linearly approximated such that each subproblem is a linear program and hence can be solved efficiently. Simulation results confirm that our proposed algorithmic approach leads to a significant reduction of the energy consumption when compared with algorithms considering the worstcase interference.