TY - JOUR
T1 - On the Spectral Efficiency and Security Enhancements of NOMA Assisted Multicast-Unicast Streaming
AU - Ding, Zhiguo
AU - Zhao, Zhongyuan
AU - Peng, Mugen
AU - Poor, H. Vincent
N1 - Funding Information:
Manuscript received November 16, 2016; revised February 21, 2017; accepted April 5, 2017. Date of publication April 24, 2017; date of current version July 13, 2017. The work of Z. Ding was supported by the UK EPSRC under grant number EP/L025272/1 and by H2020-MSCA-RISE-2015 under grant number 690750. The work of Z. Zhao and M. Peng was supported by National Natural Science Foundation of China under 61361166005 and 61501045, and the Chinese State Major Science and Technology Special Projects (Grant No. 2016ZX03001020-006). The work of H. V. Poor was supported by the U.S. National Science Foundation under Grants CNS-1456793 and ECCS-1343210. The associate editor coordinating the review of this paper and approving it for publication was J. Yuan. (Corresponding author: Zhiguo Ding.) Z. Ding is with the School of Computing and Communications, Lancaster University, Lancaster LA1 4WA, U.K.(e-mail: [email protected]) Z. Zhao and M. Peng are with the Key Laboratory of Universal Wireless Communications, Ministry of Education, Beijing University of Posts and Telecommunications, Beijing 100876, China.
Publisher Copyright:
© 2017 IEEE.
PY - 2017/7
Y1 - 2017/7
N2 - This paper considers the application of non-orthogonal multiple access (NOMA) to a multi-user network with mixed multicasting and unicasting traffic. The proposed design of beamforming and power allocation ensures that the unicasting performance is improved while maintaining the reception reliability of multicasting. Both analytical and simulation results are provided to demonstrate that the use of the NOMA assisted multicast-unicast scheme yields a significant improvement in spectral efficiency compared with orthogonal multiple access (OMA) schemes which realize multicasting and unicasting services separately. Since unicast messages are broadcast to all the users, how the use of NOMA can prevent those multicast receivers intercepting the unicasting messages is also investigated, where it is shown that the secrecy unicasting rate achieved by NOMA is always larger than or equal to that of OMA. Simulation results are provided to verify the developed analytical results and demonstrate the superior performance of the proposed NOMA scheme.
AB - This paper considers the application of non-orthogonal multiple access (NOMA) to a multi-user network with mixed multicasting and unicasting traffic. The proposed design of beamforming and power allocation ensures that the unicasting performance is improved while maintaining the reception reliability of multicasting. Both analytical and simulation results are provided to demonstrate that the use of the NOMA assisted multicast-unicast scheme yields a significant improvement in spectral efficiency compared with orthogonal multiple access (OMA) schemes which realize multicasting and unicasting services separately. Since unicast messages are broadcast to all the users, how the use of NOMA can prevent those multicast receivers intercepting the unicasting messages is also investigated, where it is shown that the secrecy unicasting rate achieved by NOMA is always larger than or equal to that of OMA. Simulation results are provided to verify the developed analytical results and demonstrate the superior performance of the proposed NOMA scheme.
KW - multicasting and unicasting
KW - Non-orthogonal multiple access (NOMA)
KW - physical layer security
UR - https://www.scopus.com/pages/publications/85028978097
U2 - 10.1109/TCOMM.2017.2696527
DO - 10.1109/TCOMM.2017.2696527
M3 - Article
AN - SCOPUS:85028978097
SN - 0090-6778
VL - 65
SP - 3151
EP - 3163
JO - IEEE Transactions on Communications
JF - IEEE Transactions on Communications
IS - 7
M1 - 7906532
ER -