The Journal of Korean Institute of Communications and Information Sciences (한국통신학회논문지)

The Korean Institute of Commucations and Information Sciences (한국통신학회)
권호 표지
DOI QR코드

DOI QR Code

Dynamic Opportunistic Interference Alignment for Random-Access Small-Cell Networks

랜덤 엑세스 스몰셀 무선망에서의 실시간 기회적 간섭정렬 기법 연구

  • Jeon, Sang-Woon (Department of Information and Communication Engineering, Andong National University) ;
  • Shin, Won-Yong (Department of Computer Science and Engineering, Dankook University)
  • Received : 2014.08.12
  • Accepted : 2014.11.18
  • Published : 2014.11.28
Download PDF
⟨ Previous Next ⟩

Abstract

As the recently soaring wireless traffic, small-cell techniques have been actively studied in order to support such a wireless demand for cellular wireless networks. This paper studies interference mitigation methods for random-access small-cell networks. Although inter-cell interference between small random-access cells is one of the main factors to degrade overall performance, most of the previous works focused on interference mitigation between users in each cell. To address such limitation, dynamic opportunistic interference alignment is proposed exploiting statistical characteristics of random-access. It is demonstrated by simulation that the proposed scheme outperforms the previous approach as the number of cells or the number of users in each cell increases.

최근 무선트래픽 수요가 폭발적으로 증가하면서 셀룰라 무선망에서 이를 효율적으로 지원하기 위한 스몰셀 연구가 활발히 수행중이다. 본 논문은 랜덤 엑세스 스몰셀 무선망에서의 간섭제어 기법에 대해 연구하였다. 기존 랜덤 엑세스 망의 경우 셀내의 사용자간 간섭제어에만 초점이 맞춰져 있지만, 스몰셀 환경에서는 셀간의 간섭이 램덤 엑세스 망의 성능을 열화시키는 주요 요인이다. 이러한 문제를 해결하기 위하여 랜덤 엑세스의 확률 특성을 반영한 실시간 기회적 간섭정렬 기법을 제안하였다. 제안기법을 통하여 기존기법 대비 셀수가 증가할수록 또한 셀내의 사용자수가 증가할수록 전송율이 획기적으로 향상됨을 모의실험을 통해 확인하였다.

Keywords

References

  1. J. Hoydis, M. Kobayashi, and M. Debbah, "Green small-cell networks," IEEE Veh. Tech. Mag., vol. 6, pp. 37-43, Mar. 2011. https://doi.org/10.1109/MVT.2010.939904
  2. A. Ghosh, N. Mangalvedhe, R. Ratasuk, B. Mondai, M. Cudak, E. Visotsky, T. A. Thomas, J. G. Andrews, P. Xia, H. S. Jo, H. S. Dhillon, and T. D. Novian, "Heterogeneous cellular networks: From theory to practice," IEEE Commun. Mag., vol. 50, pp. 54-64, Jun. 2012.
  3. R. H. Etkin, D. N. C. Tse, and H. Wang, "Gaussian interference channel capacity to within one bit," IEEE Trans. Inf. Theory, vol. 54, pp. 5534-5562, Dec. 2008. https://doi.org/10.1109/TIT.2008.2006447
  4. D.-W. Seo, S.-W. Jeon, S.-Y. Chung, and J. Kim, "Rate enhancement for the Gaussian Z-interference channel with transmitter cooperation," IEEE Commun. Lett., vol. 14, no. 9, pp. 821-823, Sept. 2010. https://doi.org/10.1109/LCOMM.2010.072610.100041
  5. S.-W. Jeon and M. Gastpar, "A servey on interference networks: Interference alignment and neutralization," Entropy, vol. 14, pp. 1842-1863, Sept. 2012. https://doi.org/10.3390/e14101842
  6. V. R. Cadambe and S. A. Jafar, "Interference alignment and degrees of freedom of the K-user interference channel," IEEE Trans. Inf. Theory, vol. 54, pp. 3425-3441, Aug. 2008. https://doi.org/10.1109/TIT.2008.926344
  7. C. Suh, M. Ho, and D. N. C. Tse, "Downlink interference alignment," IEEE Trans. Commun., vol. 59, pp. 2616-2626, Sept. 2011. https://doi.org/10.1109/TCOMM.2011.070511.100313
  8. C. Suh and D. N. C. Tse, "Interference alignment for cellular networks," in Proc. 46th Annu. Allerton Conf. Commun., Control, and Comput., Monticello, IL, Sept. 2008.
  9. S.-W. Jeon and S.-Y. Chung, "Capacity of a class of linear binary field multisource relay networks," IEEE Trans. Inf. Theory, vol. 59, pp. 6405-6420, Oct. 2013. https://doi.org/10.1109/TIT.2013.2268921
  10. T. Gou, S. A. Jafar, C. Wang, S.-W. Jeon, and S.-Y. Chung, "Aligned interference neutralization and the degrees of freedom of the 2x2x2 interference channel," IEEE Trans. Inf. Theory, vol. 58, pp. 4381-4395, Jul. 2012. https://doi.org/10.1109/TIT.2012.2191388
  11. S.-W. Jeon, S.-Y. Chung, and S. A. Jafar, "Degrees of freedom region of a class of multisource Gaussian relay networks," IEEE Trans. Inf. Theory, vol. 57, pp. 3032-3044, May 2011. https://doi.org/10.1109/TIT.2011.2119750
  12. S.-W. Jeon, C.-Y. Wang, and M. Gastpar, "Approximate ergodic capacity of a class of fading two-user two-hop networks," IEEE Trans. Inf. Theory, vol. 60, pp. 866-880, Feb. 2014. https://doi.org/10.1109/TIT.2013.2293573
  13. J. Shin, "Non-robust and robust regularized zero-forcing interference alignment methods for two-cell MIMO interfering broadcast channels," J. KICS, vol. 38A, pp. 560-570, Jul. 2013. https://doi.org/10.7840/kics.2013.38A.7.560
  14. S.-W. Jeon and B. C. Jung, "Interference neutralization for small-cell wireless networks," J. KICS, vol. 38A, pp. 1117-1124, Dec. 2013. https://doi.org/10.7840/kics.2013.38A.12.1117
  15. C. Lee, J. Kim, J. Kwak, E. Kim, and S. Chong, "Distributed BS Transmit Power Control for Utility Maximization in Small-Cell Networks," J. KICS, vol. 38A, pp. 1125-1134, Dec. 2013. https://doi.org/10.7840/kics.2013.38A.12.1125
  16. H. J. Yang, B. C. Jung, W.-Y. Shin, and A. Paulraj, "Codebook-based opportunistic interference alignment," IEEE Trans. Sig. Process., vol. 62, no. 11, pp. 2922-2937, Jun. 2014. https://doi.org/10.1109/TSP.2014.2319774
  17. H. J. Yang, W.-Y. Shin, B. C. Jung, and A. Paulraj, "Opportunistic interference alignment for MIMO interfering multiple-access channels," IEEE Trans. Wirel. Commun., vol. 12, pp. 2180-2192, May 2013. https://doi.org/10.1109/TWC.2013.032113.120673
  18. B. C. Jung, D. Park, and W.-Y. Shin, "Opportunistic interference mitigation achieves optimal degrees-of-freedom in wireless multi-cell uplink networks," IEEE Trans. Commun., vol. 60, pp. 1935-1944, Jul. 2012. https://doi.org/10.1109/TCOMM.2012.051012.110205