Open AccessEfficiency and fairness aware resource allocations for energy and spectrum in downlink OFDMA systems
Author(s) -
Wang Shengsen,
Feng Chunyan,
Guo Caili,
Wang Guoxiang
Publication year - 2014
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
eISSN - 1350-911X
pISSN - 0013-5194
DOI - 10.1049/el.2013.2121
Subject(s) - telecommunications link , computer science , mathematical optimization , max min fairness , resource allocation , efficient energy use , resource management (computing) , spectral efficiency , fairness measure , wireless , orthogonal frequency division multiplexing , frequency division multiple access , resource (disambiguation) , energy (signal processing) , computer network , distributed computing , mathematics , throughput , telecommunications , channel (broadcasting) , engineering , statistics , electrical engineering
Energy has newly become a scarcer resource for the wireless networks, like spectrum. To utilise the limited resources efficiently and fairly in the downlink OFDMA systems, a novel resource allocation problem is investigated to make the balance between energy efficiency (EE) and spectrum efficiency (SE), the tradeoff between fairness and SE/EE. The problem is first formulated as an optimisation problem, which is NP‐hard. Then, the existence of an optimal solution is proved, and an algorithm is designed to obtain the optimal solution. Finally, the numerical results show that the proposed algorithm achieves the SE–EE balance and provides a good tradeoff between fairness and SE/EE.