Performance evaluation of inter-cell interference coordination and cell range expansion in heterogeneous networks for LTE-Advanced downlink

In Long-Term Evolution (LTE)-Advanced, heterogeneous networks where femtocells and picocells are overlaid onto macrocells are extensively discussed in addition to traditional well-planned macrocell deployment to improve further the system throughput. In heterogeneous network deployment, combined usage of inter-cell interference coordination (ICIC) and cell range expansion (CRE) is very effective in improving the system and cell-edge throughput. In this combined usage, the fraction of the sets of user equipment (UEs) connected to the picocells, which are controlled through CRE, and that connected to macrocells affect the gain from the ICIC. Therefore, this paper evaluates the performance of ICIC and CRE in picocell deployments in the LTE-Advanced downlink. Simulation results (4 picocells and 30 UEs are located within 1 macrocell) assuming a full buffer model show that when the CRE offset value is set between 8 to 20 dB, almost the same user throughput performance is obtained by allocating the appropriate resources to protect UEs that connect to the picocells.

[1]  Okumura Yukihiko,et al.  Investigation on Cell Selection Methods Associated with Inter-Cell Interference Coordination in Heterogeneous Networks for LTE-Advanced Downlink , 2011 .

[2]  Frank Kelly,et al.  Rate control for communication networks: shadow prices, proportional fairness and stability , 1998, J. Oper. Res. Soc..

[3]  Ashwin Sampath,et al.  Cell Association and Interference Coordination in Heterogeneous LTE-A Cellular Networks , 2010, IEEE Journal on Selected Areas in Communications.

[4]  福井 章人,et al.  Radio transmission and reception method and a radio communication terminal device , 2008 .

[5]  Naga Bhushan,et al.  LTE-Advanced: Heterogeneous networks , 2010, 2010 European Wireless Conference (EW).

[6]  T. Ottosson,et al.  Attaining both coverage and high spectral efficiency with adaptive OFDM downlinks , 2003, 2003 IEEE 58th Vehicular Technology Conference. VTC 2003-Fall (IEEE Cat. No.03CH37484).

[7]  András Rácz,et al.  Intercell Interference Coordination in OFDMA Networks and in the 3GPP Long Term Evolution System , 2009, J. Commun..

[8]  Yongbin Wei,et al.  Downlink FTP Performance of Heterogeneous Networks for LTE-Advanced , 2011, 2011 IEEE International Conference on Communications Workshops (ICC).

[9]  Krishna Balachandran,et al.  Cell Selection with Downlink Resource Partitioning in Heterogeneous Networks , 2011, 2011 IEEE International Conference on Communications Workshops (ICC).

[10]  Hirotaka Sato,et al.  Pico Cell Range Expansion with Interference Mitigation toward LTE-Advanced Heterogeneous Networks , 2011, 2011 IEEE International Conference on Communications Workshops (ICC).