Vol 20, No 1 (2016) > Electrical and Electronics Engineering >

Discrete Power Control in Heterogenous Networks

Yuanyuan Wang 1 , Wibowo Hardjawana 1 , Branka Vucetic 1


  1. School of Electrical and Information Engineering, The University of Sydney, New South Wales 2006, Australia


Abstract: In heterogeneous networks (HetNets) where femtocellbase stations (FBSs) are deployed within the radiocoverage of macrocell base stations (MBSs) to increase network capacity, co-channel interference limits overall system performance with  universal  frequency  reuse.  This  paper investigates  new  distributed  downlink  discrete  power control  scheme  for FBSs  in  HetNets  with  FBSs cooperation.  The  objective  of  the  proposed  power control  scheme  is  to  maximize  the number of simultaneous FBSs transmissions in a single transmission wireless channel where each FBS is  allowed to transmit only if the signal-to-interference-noise ratio (SINR) requirements for both FBSs and MBS users are satisfied. We apply a stochastic learning automata technique to FBSs where each FBS is treated  as a learning automaton and maintains a probability vector to select its discrete transmit power. During the learning process, each FBS adjusts its probability  vector based  on  the  feedback  from  FGW that  indicates  the  number  of  FBSs  transmissions  that can  be supported under the SINR requirement constraints ofFUEs and MUEs. Simulation results show the proposed algorithm can  achieve  more than  twice  the  number  of simultaneous  FBS  transmissions  achieved  by  existing schemes  in  the literature.
Keywords: heterogeneous networks, wireless cellular networks
Published at: Vol 20, No 1 (2016) pages: 31-37

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