Open AccessEnergy‐efficient power allocation and mode selection in hybrid multi‐cell architecture with limited backhaul capacity
Author(s) -
Ma Yue,
Wang Xin,
Ge Songhu,
Li Wei,
Wei Jibo
Publication year - 2017
Publication title -
iet communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.355
H-Index - 62
eISSN - 1751-8636
pISSN - 1751-8628
DOI - 10.1049/iet-com.2016.0316
Subject(s) - backhaul (telecommunications) , computer science , energy consumption , efficient energy use , performance metric , mode (computer interface) , mathematical optimization , computer network , base station , mathematics , engineering , management , electrical engineering , economics , operating system
This study addresses the problem of power allocation and mode selection in a hybrid coordinated multi‐cell transmission system with limited backhaul capacity. The power consumption is considered as the extra expense due to data exchange via backhaul links. A novel hybrid multi‐cell scheme is presented, in which each mobile station (MS) can dynamically select either interference channel or multi‐cell multi‐input and multi‐output cooperation mode. To maximise energy efficiency (EE), the optimal power allocation scheme with low complexity is proposed. Moreover, the authors propose an energy‐efficient mode selection metric for each MS, which reflects both benefits and extra expense brought by the selected cooperation mode. Based on the proposed metric, the optimal mode selection strategy maximising EE is obtained. Numerical results show that the hybrid multi‐cell scheme outperforms the traditional single cooperation mode scheme in terms of EE.