In this thesis, we applied the HARQ and AMC to the NOMA system with SIC
receiver. We investigated a scheduling method and new method of measuring average
throughput for PF scheduling. With the scheduling method, we can use the
information stored in buffer effectively to improve the efficiency of HARQ. The new
PF algorithm can prevent from continuously serving cell edge users and provide more
accurate measurement for average throughput. The new PF algorithm can achieve a
notable gain for either system throughput or cell edge throughput and have better
performance.
In addition, we discussed the influence of aggressiveness for MUST with HARQ.
By allowing higher order MCS for the far UE to make it aggressive, the system
throughput can be improved.
Also, we proposed an algorithm which can adaptively adjust MCS thresholds in
NOMA system. The systems usually affected by fading channel seriously and thus
systems are always designed for the worst-case channel conditions. With the adaptive
threshold adjustment algorithm, the MCS thresholds can adapt to the current channel
condition and get better system throughput. Simulation results show that the algorithm
worked successfully and achieved significant performance gain by adjusting the MCS
thresholds to better value on NOMA system.
Some directions of future works are discussed. In the work of this study, we
assume that the feedback channel between base station and UEs is ideal. Also, we
ignore the correlation between near user and far user to simplify the NOMA system
for AAMC algorithm. We might take these issues into consideration to make this task
more complete.
44
BIBLIOGRAPHY
[1] C.-X. Wang et al., “Cellular architecture and key technologies for 5G wireless communication networks,” IEEE Commun. Mag., vol. 52, no. 2, pp. 122–130, Feb.
2014
[2] Y. Saito , A. Benjebbour , Y. Kishiyama and T. Nakamura, “System level
performance evaluation of downlink non-orthogonal multiple access (NOMA) ” IEEE
VTC, June 2013
[3] Evolved Universal Terrestrial Radio Access (E-UTRA); LTE Physical
Layer-General Description (Release 8). 3GPP TSG RAN TS 36.201 Version 8.3.0,
September 2009.
[4] S. Kallel and D. Haccoun, “Generalized type II hybrid ARQ scheme using
punctured convolutional coding” IEEE Transactions on Communications, vol.38, no.
11, pp. 1938-1946, November 1990.
[5] A. Das, F. Kuan, A. Sampath, and H.-J. Su, “Adaptive asynchronous incremental
redundancy (A2IR) with fixed transmission time interval (TTI) for hsdpa,” in Proc.
2002 IEEE 13th International Symposium on Personal, Indoor and Mobile Radio
Communications (PIMRC 2002), Lisboa, Portugal, September 15-18 2002, pp.
1083-1087.
[6] A. Li, A. Benjebbour, X. Chen, H. Jiang, and H. Kayama, “Investigation on
hybrid automatic repeat request (HARQ) design for NOMA with SU-MIMO,” in Proc.
IEEE 26th Annu. Int. Symp. Pers., Indoor, Mobile Radio Commun. (PIMRC),
Aug./Sep. 2015, pp. 590–594.
[7] Y. Saito, Y. Kishiyama, A. Benjebbour, T. Nakamura, A. Li, and K. Higuchi,
“Non-orthogonal multiple access (NOMA) for future radio access,” in Proc. IEEE
VTC2013-Spring, pp. 1-5, Dresden, Germany, June 2013
[8] . Dahlman, S. Parkvall, J. Skold, and P. Beming, 3G Evolution: HSPA and LTE
For Mobile Broadband , 2nd edition. Elsevier, 2008.
[9] S. Kallel and D. Haccoun. Generalized type II hybrid ARQ scheme using
punctured convolutional coding. IEEE Trans. Commun., 38(11):1938-1946,
November 1990.
[10] 3GPP, R1-155931,NTT DOCOMO, “System-level evaluation results for downlink multiuser superposition schemes,” Malmö, Sweden, Oct. 5 – 9 2015
[11] Li, Anxin, et al. "Investigation on hybrid automatic repeat request (HARQ)
design for NOMA with SU-MIMO." Personal, Indoor, and Mobile Radio
Communications (PIMRC), 2015 IEEE 26th Annual International Symposium on.
IEEE, 2015.
[12] Zheng, Haitao, and Harish Viswanathan. "HARQ aware scheduler in downlink
46
packet data systems." Vehicular Technology Conference, 2003. VTC 2003-Fall. 2003
IEEE 58th. Vol. 3. IEEE, 2003.
[13] A. J. Goldsmith and S. G. Chua, “Adaptive coded modulation for fading channels,” IEEE Transactions on Communications, vol. 45, pp. 595-602, May 1998.
[14] Liao, Wei-Shun, and Hsuan-Jung Su. "Throughput maximization by adaptive
threshold adjustment for AMC systems." APSIPA ASC (2011).
[15] Su, Hsuan-Jung, and Li-Wei Fang. "A simple adaptive throughput
maximization algorithm for adaptive modulation and coding systems with hybrid
ARQ." Proc. International Symposium on Communications, Control, and Signal
Processing (ISCCSP), Marrakech, Morocco. 2006.
[16] Schaepperle, Joerg, and Andreas Rüegg. "Enhancement of throughput and
fairness in 4G wireless access systems by non‐orthogonal signaling." Bell Labs
Technical Journal 13.4 (2009): 59-77.
[17] Nagisa, O. T. A. O., Yoshihisa Kishiyama, and Kenichi Higuchi. "Performance
of non-orthogonal multiple access with SIC in cellular downlink using proportional
fair-based resource allocation." IEICE Transactions on Communications 98.2 (2015):
344-351.
[18] Su, Hsuan-Jung. "On adaptive threshold adjustment with error rate constraints
for adaptive modulation and coding systems with hybrid ARQ." 2005 5th
International Conference on Information Communications & Signal Processing.
IEEE, 2005.
[19] Chen, Fan, et al. "Research on threshold adjustment algorithm in adaptive
modulation and coding." 2006 IEEE 17th International Symposium on Personal,
Indoor and Mobile Radio Communications. IEEE, 2006.
[20] Tarchi, Daniele, et al. "Novel link adaptation for TETRA cellular systems."
International Journal of Communication Systems 22.4 (2009): 483-501.
[21] 3GPP, R1-157352, NTT DOCOMO, “System-level evaluation results for downlink multiuser superposition schemes,” Anaheim, USA, Nov. 5 – 9 2015
[22] 3GPP, R1- 168072, National Taiwan University, “Design issues of MUST with HARQ,” Gothenburg, Sweden, Aug. 22 – 26 2016
[23] 3GPP, R1- 168071, National Taiwan University, “Performance of MUST with
HARQ,” Gothenburg, Sweden, Aug. 22 – 26 2016
[24] Akyildiz, Ian F., David M. Gutierrez-Estevez, and Elias Chavarria Reyes. "The
evolution to 4G cellular systems: LTE-Advanced." Physical Communication 3.4
(2010): 217-244.
[25] Lan, Yang, et al. "Considerations on downlink non-orthogonal multiple access
(NOMA) combined with closed-loop SU-MIMO." Signal Processing and
Communication Systems (ICSPCS), 2014 8th International Conference on. IEEE,
48 2014.
[26] Li, A., A. Harada, and H. Kayama. "Investigation on low complexity power
assignment method and performance gain of non-orthogonal multiple access
systems." IEICE trans. commun (2014).
[27] Das, Arnab, et al. "Performance of hybrid ARQ for high speed downlink packet
access in UMTS." Vehicular Technology Conference, 2001. VTC 2001 Fall. IEEE
VTS 54th. Vol. 4. IEEE, 2001.
[28] Oviedo, Jose Armando, and Hamid R. Sadjadpour. "A New NOMA Approach for
Fair Power Allocation." arXiv preprint arXiv:1605.00390 (2016).