A novel ICIC scheme for reducing intra cluster interference in LTE-Hi network

In order to further improve the user experience in Hotspot or Indoor areas, Ultra-dense smallcell deployments in a new and high frequency band, e.g., 3.5 GHz, have been identified as a very interesting topic in Long Term Evolution—Hotspot or indoor (LTE-Hi) Release 12. The intra cluster interference among small cells becomes the main challenge instead of the cross layer interference for macro cell and small cell co-channel deployments. The traditional enhanced inter-cell interference coordination (eICIC) technology employing almost blank subframes (ABSs) and cell range extension (CRE) is no longer suitable for this challenge. A novel and effective time domain Orthogonal Subframe Partitioning and Adaptive Subframes Reuse (OSP+ASR) ICIC scheme is proposed to addresses the downlink intra cluster interference. The smallcells adaptively select their orthogonal subframes and reused subframes, according to the subframes configuration of the smallcells in their interference pool and their UEs' SINR respectively. System simulation results show that the proposed scheme can greatly improve the average smallcell throughput and the average SINR of smallcell users (SUEs), as well as the fairness of SUEs.

[1]  Yuehong Gao,et al.  Performance Evaluation on Cell Clustering Interference Mitigation and CoMP in Multi-Pico Network with Dynamic TDD , 2015, 2015 IEEE 81st Vehicular Technology Conference (VTC Spring).

[2]  Jing Wang,et al.  Time Domain Inter-Cell Interference Coordination for Dense Small Cell Deployments , 2014, 2014 IEEE 80th Vehicular Technology Conference (VTC2014-Fall).

[3]  Klaus I. Pedersen,et al.  Performance Analysis of Enhanced Inter-Cell Interference Coordination in LTE-Advanced Heterogeneous Networks , 2012, 2012 IEEE 75th Vehicular Technology Conference (VTC Spring).

[4]  Tony Q. S. Quek,et al.  Enhanced intercell interference coordination challenges in heterogeneous networks , 2011, IEEE Wireless Communications.

[5]  Young-Jun Hong,et al.  System level performance evaluation of inter-cell interference coordination schemes for heterogeneous networks in LTE-A system , 2010, 2010 IEEE Globecom Workshops.

[6]  John Cosmas,et al.  Self-organizing interference coordination for future LTE-Advanced network QoS improvements , 2014, 2014 IEEE International Symposium on Broadband Multimedia Systems and Broadcasting.

[7]  Cheng Wang,et al.  Reduced power centralized eICIC for LTE-advanced heterogeneous networks , 2014, 2014 IEEE/CIC International Conference on Communications in China (ICCC).

[8]  Mohammed Adil Ibrahim Ali,et al.  Fractional frequency reuse in LTE networks , 2015, 2015 2nd World Symposium on Web Applications and Networking (WSWAN).