Acta Metallurgica Sinica(English letters) ›› 2013, Vol. 20 ›› Issue (4): 28-33.doi: 10.1016/S1005-8885(13)60065-5

• Wireless • Previous Articles     Next Articles

Dynamic bias setting for range extension in LTE-advanced macro-pico heterogeneous networks


  1. School of Information and Communication Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China
  • Received:2013-01-04 Revised:2013-04-10 Online:2013-08-31 Published:2013-08-30
  • Supported by:
    This work was supported by Funds for Creative Research Groups of China (61121001), the National Science and Technology Major Project (2012ZX03003012-004, 2012ZX03004-005-002), and the Program for Changjiang Scholars and Innovative Research Team in University (IRT1049).

Abstract: In co-channel deployment of macro cell and pico cells, cell range extension (RE), a simple and typical cell association scheme, is introduced to achieve better load balancing and improve cell edge performance. In this article, a novel dynamic and distributed bias setting scheme is proposed for RE technique in macro-pico heterogeneous networks. In this strategy, the worst user throughput of each cell during an adjusting time interval T is obtained to change the bias values according to certain procedures, where an introduced indicator is used to freeze the possibility of increasing bias value if needed. Furthermore, silent state and coarse control process are employed to achieve low overheads and computational complexity. Simulation results show that the proposed scheme can greatly improve the cell-edge performance compared with the static bias setting strategies, while maintaining the overall cell performance at the same time.

Key words: RE, heterogeneous network, enhanced inter cell interference coordination (eICIC), dynamic, bias setting, pico cells