Title :
An Efficient Inter-Cell Interference Coordination Scheme in Heterogeneous Cellular Networks
Author :
Yanlong Wang ; Yongyu Chang ; Dacheng Yang
Author_Institution :
Wireless Theor. & Technol. Lab. (WT&T), Beijing Univ. of Posts & Telecommun., Beijing, China
Abstract :
As a mainstream technology in the 4G TDD (Time Division Duplex) systems, TD-LTE (Long Term Evolution) introduces heterogeneous network topology, utilizing a diverse set of base stations, to improve spectral efficiency per unit area. In heterogeneous network deployment comprised of macrocell and picocell, inter-cell interference coordination (ICIC) is very important to significantly improve the system and cell-edge throughput. Moreover, variety of complex situation of inter-cell interference (ICI) occurs in heterogeneous TDD LTE cellular networks due to different downlink/uplink (DL/UL) sub-frame configurations of macrocell and picocell. Therefore, this paper proposes an efficient ICIC scheme consisting of four sub-schemes according to relevant interference scenarios based on different sub-frame configurations. The scheme first analyzes interference level and finds out strong interference for each scenario. The basic idea of ICIC is that only primary interfering sources of each scenario avoid using the same frequency resource occupied by interfered victim, and other interfering sources can reuse frequency resource. Numerical results show that our proposed ICIC scheme can not only improve performance of whole region including macrocell area and picocell area, but also significantly achieve higher throughput for cell edge users.
Keywords :
4G mobile communication; Long Term Evolution; cellular arrays; picocellular radio; radio links; radiofrequency interference; telecommunication network topology; 4G TDD systems; 4G time division duplex systems; DL-UL subframe configurations; ICIC scheme; base stations; cell edge users; cell-edge throughput; complex situation; downlink-uplink subframe configurations; frequency resource; heterogeneous TDD LTE cellular networks; heterogeneous cellular networks topology; heterogeneous network deployment; intercell interference coordination; intercell interference coordination scheme; long term evolution; macrocell area; mainstream technology; picocell area; spectral efficiency per unit area; Downlink; Interference; Macrocell networks; OFDM; Resource management; Throughput;
Conference_Titel :
Vehicular Technology Conference (VTC Fall), 2012 IEEE
Conference_Location :
Quebec City, QC
Print_ISBN :
978-1-4673-1880-8
Electronic_ISBN :
1090-3038
DOI :
10.1109/VTCFall.2012.6398987