한국산학기술학회논문지 (Journal of the Korea Academia-Industrial cooperation Society)

  • 제22권2호
  • /
  • Pages.11-19
  • /
  • 2021
  • /
  • 1975-4701(pISSN)
  • /
  • 2288-4688(eISSN)
한국산학기술학회 (The Korea Academia-Industrial cooperation Society)
권호 표지
DOI QR코드

DOI QR Code

비직교 다중접속 방식을 이용한 다중 유니캐스트와 멀티캐스트 스트림 동시 전송

Simultaneous Transmission of Multiple Unicast and Multicast Streams Using Non-orthogonal Multiple Access

  • 신창용 (선문대학교 정보통신공학과)
  • Shin, Changyong (Department of Information and Communications Engineering, Sun Moon University)
  • 투고 : 2020.08.25
  • 심사 : 2021.02.05
  • 발행 : 2021.02.28
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

본 논문에서는 주파수 효율적으로 다중 유니캐스트와 멀티캐스트 스트림을 동시에 전송하기 위한 채널정렬 기반 비직교 다중접속 방법을 제안한다. 이 방법에서 멀티캐스트 클러스터 내 수신기들은 자신의 채널을 정렬하는 수신 빔포밍 벡터를 채용하고 기지국은 정렬된 채널 정보를 이용하여 멀티캐스트 클러스터 간 간섭을 제거하는 송신 빔포밍 벡터를 설계한다. 유니캐스트 수신기들은 송신 빔포밍 벡터와 결합된 유효수신채널 정보를 이용하여 유니캐스트 수신기 간 간섭을 제거하는 수신 빔포밍 벡터를 설계한다. 제안한 방법은 간섭을 효과적으로 제거하여 높은 SNR 영역에서 기존의 직교 다중접속 방법보다 높은 총합 데이터 율을 달성한다. 또한 제안한 비직교 다중접속 방법과 기존의 직교 다중접속 방법의 장점을 결합하는 하이브리드 방법을 제안한다. 이 방법은 채널상태에 따라 적응적으로 낮은 SNR 영역에서는 수신신호전력을 향상하는 기존의 직교 다중접속 방법을 적용하고 높은 SNR 영역에서는 효과적으로 간섭을 제거하는 제안한 비직교 다중접속 방법을 적용한다. 이를 통해 제안한 하이브리드 방법은 전체 SNR 영역에서 우수한 총합 데이터율을 달성한다.

In this paper, we propose a non-orthogonal multiple access (NOMA) method based on channel alignment to simultaneously transmit multiple unicast and multicast streams in frequency-efficient manner. In this method, all receivers in a multicast cluster use the receive beamforming vectors that align their channels, and the base station uses the aligned channel information to design the transmit beamforming vectors that eliminate interference between multicast clusters. Using the effective receive channel information combined with the transmit beamforming vectors, unicast receivers design their own receive beamforming vectors that eliminate interference between unicast receivers. Since the proposed method effectively eliminates the interference, it achieves a higher sum rate than the existing orthogonal multiple access (OMA) method in high SNR regions. In addition, we present a hybrid method that exploits the benefits of the proposed NOMA method and the existing OMA method. Depending on the channel state, the hybrid method adaptively employs the existing OMA method, which improves the received signal power, in low SNR regions and the proposed NOMA method, which effectively eliminates the interference, in high SNR regions, thereby achieving a good sum rate over the entire SNR region.

키워드

참고문헌

  1. Cisco, "Cisco Annual Internet Report (2018-2023)," White Paper, March 2020.
  2. H. Viswanathan and P. E. Mogensen, "Communications in the 6G era," IEEE Access, vol. 8, pp. 57063 - 57074, March 2020. DOI: https://doi.org/10.1109/ACCESS.2020.2981745
  3. M. Giordani, M. Polese, M. Mezzavilla, S. Rangan, and M. Zorzi, "Toward 6G networks: Use cases and technologies," IEEE Commun. Mag., vol. 58, no. 3, pp. 55-61, March 2020. DOI: https://doi.org/10.1109/MCOM.001.1900411
  4. P. Yang, Y. Xiao, M. Xiao, and S. Li, "6G wireless communications: Vision and potential techniques," IEEE Network, vol. 33, no. 4. pp. 70-75, July 2019. DOI: https://doi.org/10.1109/MNET.2019.1800418
  5. E. G. Larsson, F. Tufvesson, O. Edfors, and T. L. Marzetta, "Massive MIMO for next generation wireless systems," IEEE Commun. Mag., vol. 52, no. 2, pp. 186-195, Feb. 2014. DOI: https://doi.org/10.1109/MCOM.2014.6736761
  6. D. Kim, H. Lee, and D. Hong, "A survey of in-band full-duplex transmission: From the perspective of phy and mac layers," IEEE Commun. Surveys Tuts., vol. 17, no. 4, pp. 2017-2046, Nov. 2015. DOI: https://doi.org/10.1109/COMST.2015.2403614
  7. S. M. R. Islam, N. Avazov, O. A. Dobre, and K.-S. Kwak, "Power-domain non-orthogonal multiple access (NOMA) in 5G systems: Potentials and challenges," IEEE Commun. Surveys Tuts., vol. 19, no. 2, pp. 721-742, June 2017. DOI: https://doi.org/10.1109/COMST.2016.2621116
  8. M. Zeng, A. Yadav, P. Fan, O. A. Dobre, G. I. Tsiropoulos, and H. V. Poor, "Capacity comparison between MIMO-NOMA and MIMO-OMA with multiple users in a cluster," IEEE J. Sel. Areas Commun., vol. 35, no. 10, pp. 2413-2424, Oct. 2017. DOI: https://doi.org/10.1109/JSAC.2017.2725879
  9. Q. Wang, R. Zhang, L.-L. Yang, and L. Hanzo, "Non-orthogonal multiple access: A unified perspective," IEEE Wireless Commun., vol. 25, no. 2, pp. 10-16, April 2018. DOI: https://doi.org/10.1109/MWC.2018.1700070
  10. K. Yang, N. Yang, N. Ye, M. Jia, Z. Gao, and R. Fan, "Non-orthogonal multiple access: Achieving sustainable future radio access," IEEE Commun. Mag., vol. 57, no. 2, pp. 116-121, Feb. 2019. DOI: https://doi.org/10.1109/MCOM.2018.1800179
  11. Y. Saito, Y. Kishiyama, A. Benjebbour, T.Nakamura, and K. Higuchi, "Non-orthogonal multiple access (NOMA) for cellular future radio access," in Proc. IEEE Veh. Tech. Conf., Dresden, Germany, June 2013, pp. 1-5. DOI: https://doi.org/10.1109/VTCSpring.2013.6692652
  12. K. Higuchi and Y. Kishiyama, "Non-orthogonal multiple access using intra-beam superposition coding and successive interference cancellation for cellular MIMO Downlink," IEICE Trans. Commun., vol. E98-B, no. 9, pp. 1888-1895, Sept. 2015. DOI: https://doi.org/10.1587/transcom.E98.B.1888
  13. Z. Ding, F. Adachi, and H. V. Poor, "The application of MIMO to non-orthogonal multiple access," IEEE Trans. Wireless Commun., vol. 15, no. 1, pp. 537-552, Jan. 2016. DOI: https://doi.org/10.1109/TWC.2015.2475746
  14. Z. Ding, R. Schober, and H. V. Poor, "A general MIMO framework for NOMA downlink and uplink transmission based on signal alignment," IEEE Trans. Wireless Commun., vol. 15, no. 6, pp. 4438-4454, June 2016. DOI: https://doi.org/10.1109/TWC.2016.2542066
  15. J. Choi, "Minimum power multicast beamforming with superposition coding for multiresolution broadcast and application to NOMA systems," IEEE Trans. Commun., vol. 63, no. 3, pp. 791-800, March 2015. DOI: https://doi.org/10.1109/TCOMM.2015.2394393
  16. J. Montalban, P. Scopelliti, M. Fadda, E. Iradier, C. Desogus, P. Angueira, M. Murroni, and G. Araniti, "Multimedia multicast services in 5G networks: Subgrouping and non-orthogonal multiple access techniques," IEEE Commun. Mag., vol. 56, no. 3, pp. 91-95, March 2018. DOI: https://doi.org/10.1109/MCOM.2018.1700660
  17. G. Araniti, M. Condoluci, M. Cotronei, A. Iera, and A. Molinaro, "A solution to the multicast subgroup formation problem in LTE systems," IEEE Wireless Commun. Lett., vol. 4, no. 2, pp. 149-152., April 2015. DOI: https://doi.org/10.1109/LWC.2014.2387824
  18. Z. Yang, J. A. Hussein, P. Xu, Z. Ding, and Y. Wu, "Power allocation study for non-orthogonal multiple access networks with multicast-unicast transmission," IEEE Trans. Wireless Commun., vol. 17, no. 6, pp. 3588-3599, June 2018. DOI: https://doi.org/10.1109/TWC.2018.2806972