Nonorthogonal Random Access for 5G Mobile Communication Systems

Seo, Jun-Bae; Jung, Bang Chul; Jin, Hu

doi:10.1109/tvt.2018.2825462

Cited by 57 publications

(32 citation statements)

References 8 publications

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“…These techniques enable to constructively exploit the collisions by canceling the interference due to the correctly received packets, in order to allow the possible recovery of other initially collided packets. IC has immediately gained interest in the cellular context for separating multiple superimposed signals, with the aim of enabling non-orthogonal multiple access (NOMA) [10], and non-orthogonal random access (NORA) mechanisms [11]. A first algorithm combining DSA and IC is the contention resolution DSA (CRDSA) [7].…”

Section: A Related Workmentioning

confidence: 99%

“…This issue has been also outlined in [26], by showing that the density evolution analysis originally adopted in [9] may become less accurate in the presence of capture, even when it involves just the single segment and erasure packet decoding is assumed, because of the interdependence among slices and the approximate SINR modeling after each IC cycle. In the here proposed model, the difficulty in theoretically modeling the powers of the remaining segments is further enhanced by the fact that the capture event, according to (11), jointly accounts for all the segments of the packet.…”

Section: B Fsa With Segmentation Capture and Icmentioning

confidence: 99%

“…With respect to the exact definition involving the Q-function, (46) has the advantage of being invertible simultaneously maintaining an approximation error lower than 1% for SINR values not too close to zero. For this reason, it is used in (11) to evaluate the equivalent rate of each transmission carried out using the adopted code-modulation pair. The subsequent throughput evaluation for the FSA system is carried out numerically, since, even if the cdf of Λ l may still be analytically derived, a possible equivalent rate analysis does not provide closed-form expressions.…”

Section: Practical Systemmentioning

confidence: 99%

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Impact of Segmentation and Capture on Slotted Aloha Systems Exploiting Interference Cancellation

Babich

Comisso

2019

IEEE Trans. Veh. Technol.

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The performance of the widely adopted slotted Aloha (SA) scheme has been recently improved thanks to the introduction of novel mechanisms, including interference cancellation (IC), packet segmentation, and slot slicing. The combined effect of these mechanisms in the presence of capture has however not yet deeply investigated, even if the resulting impact on the network behavior is determinant for properly quantifying the achievable throughput. To deal with this issue, this paper analyzes the influence of capture on a framed SA (FSA) system adopting IC, segmentation, and slicing, by considering a reliable decoding criterion that accounts for the actually experienced signal to interference-plus-noise ratio. A theoretical model is developed to evaluate the capture probability in fast and slow Rayleigh fading conditions, deriving closed-form expressions for the interferencelimited case. The IC-based FSA throughput is then estimated adopting a Markov chain approach validated by Monte Carlo simulations. Finally, the performance of an actual system using a quadrature phase-shift keying modulation in conjunction with a turbo encoder is compared with that estimated by adopting the considered decoding criterion, in order to check its applicability to practical communication networks.

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Section: A Related Workmentioning

confidence: 99%

Section: B Fsa With Segmentation Capture and Icmentioning

confidence: 99%

Section: Practical Systemmentioning

confidence: 99%

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Impact of Segmentation and Capture on Slotted Aloha Systems Exploiting Interference Cancellation

Babich

Comisso

2019

IEEE Trans. Veh. Technol.

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“…In order to address this problem, uplink power control has been proposed [4], [5], where the transmission power is allocated according to different path losses of different devices. In addition, the channel inversion technique [6]- [9] exploits instantaneous channel state information at transmitters (CSIT) to perform transmission power G. Song and C. Yuen are with Singapore University of Technology and Design, Singapore 119613 (e-mail: ghsong2008@hotmail.com; yuen-chau@sutd.edu.sg).…”

Section: Introductionmentioning

confidence: 99%

Random NOMA With Cross-Slot Successive Interference Cancellation Packet Recovery

Zhang

Liu

Song

et al. 2020

IEEE Wireless Commun. Lett.

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Conventional power-domain non-orthogonal multiple access (NOMA) relies on precise power control, which requires real-time channel state information at transmitters. This requirement severely limits its application to future wireless communication systems. To address this problem, we consider NOMA without power allocation, where we exploit the random channel fading and opportunistically perform successive interference cancellation (SIC) detection. To mitigate the multi-user interference, we propose a random NOMA where users randomly transmit their data packets with a certain probability. Then a cross-slot SIC packet recovery scheme is proposed to recover transmitted data packets. We model the cross-slot SIC packet recovery as a Markov process, and provide a throughput analysis, based on which the sum rate is maximized by jointly optimizing the transmission probability and the encoding rate of users.

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“…Hence a key technology is required utmost to solve the current requirements of huge data traffic. Non-Orthogonal Multiple Access (NOMA), a novel multiple access technology is considered as a capable and most suitable multiple access technology for the future generation cellular networks due to such a high Spectral efficiency and massive connectivity of NOMA [4][5][6][7]. Non-Orthogonal Multiple Access (NOMA) defines multiuser transmission schemes which allows interference among users.…”

Section: Introductionmentioning

confidence: 99%

On Sum- Throughput and Fairness Index analysis of Downlink NOMA Over OFDMA for Machine -to -Machine Communication

Selvam¹,

Kumar²

2019

International Journal of Advanced Research in Computer and Comm

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With the anticipated exponential increase in the volume of cellular traffic e.g., beyond a 1000 fold increase in the next decade, significant gains in sum throughput and Fairness index of the system are required to satisfy all the users with the excellent quality of user experience. As a potential candidate of multiple access technique for 5G, Non-Orthogonal Multiple Access (NOMA) can be an effective and noteworthy solution to M2M communications to serve more number of users by the same resource to achieve significant spectrum efficiency gain over conventional Orthogonal frequency division multiple access. NOMA, a novel technique can provide more satisfied level of Sumthroughput and Fairness index value to all the devices and users. In this paper, the performance of Sum-throughput and Fairness Index of NOMA technique is analysed and compared it with existing OFDMA system. Simulation results demonstrate that the NOMA technique outperforms the prevailing OFDMA technique with respect to Sum-throughput and Fairness Index of users, thus can be a potential solution for effective use of limited bandwidth constraint to suffix the need of future M2M communications.OFDMA with respect to Sum-throughput and Fairness index and thus, NOMA is proved to be a potential technology for future mobile communications such as 5G to accommodate and serve the massive increase in the number of M2M communication devices.

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Nonorthogonal Random Access for 5G Mobile Communication Systems

Cited by 57 publications

References 8 publications

Impact of Segmentation and Capture on Slotted Aloha Systems Exploiting Interference Cancellation

Impact of Segmentation and Capture on Slotted Aloha Systems Exploiting Interference Cancellation

Random NOMA With Cross-Slot Successive Interference Cancellation Packet Recovery

On Sum- Throughput and Fairness Index analysis of Downlink NOMA Over OFDMA for Machine -to -Machine Communication

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