Coordinated Fair Scheduling in LTE-Advanced Multi-Sector Cells
Subject Areas : electrical and computer engineering
M.
Abiri
1
Mehri
Mehrjoo
2
R.
Abaspour Ghadi
3
Keywords: Coordinated multi-point transmission fairness LTE-A scheduling multi-sectored cell,
Abstract :
In this paper, we propose a coordinated fair scheduling (CFS) scheme for LTE-Advanced networks where the cells are equipped with multiple sector antennas. To enhance the network spectral efficiency and throughput, the sectors use the same frequency bands. However, to reduce the co-channel interference, the transmissions from the sectors to the users are coordinated. In other words, multiple sectors are allowed to transmit simultaneously, if the occurred co-channel interference is less than a threshold value. The scheduling scheme takes advantage of the user's diversity in space to transmit to the users with good channel conditions while maintaining fairness among the users using the alpha-fair criterion. Furthermore, a heuristic approach is proposed to reduce the computational complexity of the scheduling scheme. The performance of the proposed CFS scheme and the heuristic approach are evaluated using simulation results. The simulation results show that using coordinated fair scheduling improves system performance and increases cell throughput.
[1] 3GPP Technical Report 36.913, Requirements for Further Advancements for E-UTRA (LTE-Advanced), Jun. 2008.
[2] M. Sawahashi, Y. Kishiyama, A. Morimoto, D. Nishikawa, and M. Tanno, "Coordinated multipoint transmission/reception techniques for LTE-advanced [coordinated and distributed MIMO]," IEEE Trans. Wireless Communications, vol. 17, no. 3, pp. 26-34, Jun. 2010.
[3] S. Sun, Q. Gao, Y. Peng, Y. Wang, and L. Song, "Interference management through CoMP in 3GPP LTE-advanced networks," IEEE Wireless Communications, vol. 20, no. 1, pp. 59-66, Feb. 2013.
[4] L. Venturino, A. Zappone, C. Risi, and S. Buzzi, "Energy-efficient scheduling and power allocation in downlink OFDMA networks with base station coordination," IEEE Trans. Wireless Communications, vol. 14, no. 1, pp. 1-14, Jan. 2014.
[5] W. Yu, T. Kwon, and C. Shin, "Multicell coordination via joint scheduling, beamforming, and power spectrum adaptation," IEEE Trans. on Wireless Communications, vol. 12, no. 7, pp. 1-14, Jul. 2013.
[6] P. Mitran, C. Rosenberg, J. Sydor, J. Luo, and S. Shabdanov, "On the capacity and scheduling of a multi-sector cell with co-channel interference knowledge," in Proc. 9th IFIP Annual Mediterranean Ad Hoc Networking Workshop, 8 pp., Aug. 2010.
[7] J. Mo and J. Walrand, "Fair end-to-end window-based congestion control," IEEE/ACM Trans. on Networking, vol. 8, no. 5, pp. 556-567, Oct. 2000.
[8] E. Altman, K. Avrachenkov, and A. Garnaev, "Generalized α-fair resource allocation in wireless networks," in Proc. 47th IEEE Conf. on Decision and Control, pp. 2414-2419, 9-11 Dec. 2008.
[9] C. Touati, E. Altman, and J. Galtier, "Generalized Nash bargaining solution for bandwidth allocation," Computer Networks, vol. 50, no. 17, pp. 3242-3263, Dec. 2006.
[10] ر. عباسپور قادی، کاهش تداخل همکانال با استفاده از آنتنهای هوشمند در شبکهی سلولی، پاياننامه كارشناسي ارشد، دانشگاه سیستان و بلوچستان، بهمن 1390.