A throughput study of grant-free multiple access for massive wireless communications

Pyo, Cheol Sig; Takizawa, Kenji; Moriyama, Masafumi; Oodo, Masayuki; Tezuka, Hiroyasu; Ishizu, Koji; Kojima, Fumihide

doi:10.1109/wpmc.2017.8301870

Cited by 7 publications

(2 citation statements)

References 6 publications

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“…The performance comparison between GBA and GFA is studied in [120]- [124]. The results in [125] reveal that GFA can achieve higher throughput under proper retransmission limits. The results of HRLL communications in an outdoor macro scenario are presented in [121], [122], which show that GFA outperforms GBA in terms of latency at the target reliability and achieves the maximum payload with the smallest latency performance degradation [121].…”

Section: Grant-free Accessmentioning

confidence: 99%

High-Reliability and Low-Latency Wireless Communication for Internet of Things: Challenges, Fundamentals, and Enabling Technologies

Xiao

et al. 2019

IEEE Internet Things J.

224

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As one of the key enabling technologies of emerging smart societies and industries (i.e., industry 4.0), the Internet of Things (IoT) has evolved significantly in both technologies and applications. It is estimated that more than 25 billion devices will be connected by wireless IoT networks by 2020. In addition to ubiquitous connectivity, many envisioned applications of IoT, such as industrial automation, vehicle-to-everything (V2X) networks, smart grids and remote surgery, will have stringent transmission latency and reliability requirements, which may not be supported by existing systems. Thus, there is an urgent need for rethinking the entire communication protocol stack for wireless IoT networks. In this tutorial paper, we review the various application scenarios, fundamental performance limits, and potential technical solutions for high-reliability and lowlatency (HRLL) wireless IoT networks. We discuss physical, MAC and network layers of wireless IoT networks, which all have significant impacts on latency and reliability. For the physical layer, we discuss the fundamental information-theoretic limits for HRLL communications, and then we also introduce a frame structure and preamble design for HRLL communications. Then practical channel codes with finite block length are reviewed. For the MAC layer, we first discuss optimized spectrum and power resource management schemes and then recently proposed grantfree schemes are discussed. For the network layer, we discuss the optimized network structure (traffic dispersion and network densification), the optimal traffic allocation schemes and network coding schemes to minimize latency.

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Section: Grant-free Accessmentioning

confidence: 99%

High-Reliability and Low-Latency Wireless Communication for Internet of Things: Challenges, Fundamentals, and Enabling Technologies

Xiao

et al. 2019

IEEE Internet Things J.

224

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“…Based on the proposed interference model, the outage probability of the NOMA scheme was derived, and the throughput achieved, by using both successive joint decoding (SJD) and SIC schemes, was analyzed. In [27], authors compared the network throughput of a grant-free multiple access (GFMA) to that of slotted ALOHA and grant multiple access in LTE system.…”

Section: Introductionmentioning

confidence: 99%

Asynchronous Flipped Grant-Free SCMA for Satellite-Based Internet of Things Communication Networks

Cui

Wang

2019

Applied Sciences

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Sparse code multiple access (SCMA) is a promising code domain non-orthogonal multiple-access scheme which is able to support massive connectivity and grant-free transmission in future satellite-based Internet of Things (IoT) communication networks. Traditional grant-free SCMA is based on time synchronization, which is no longer favorable in such satellite communication networks since the amount of signaling generated to keep all transmitters’ time synchronized is impractical for large networks. Moreover, without centralized codebook assignment, grant-free SCMA suffers from codebook collisions which mean more than one terminal selecting the same codebook being interfered. Motivated by these issues, a novel uplink grant-free asynchronous flipped SCMA scheme named AF-SCMA is proposed in this paper. With the concept of flipped diversity, a specific SCMA-encoded packet is transmitted with its flipped replica together. Successive interference cancellation technique combined with a sliding window is adopted to resolve the packet collisions including codebook collisions at the gateway station. The performance of AF-SCMA is investigated via both mathematical analysis and simulations. Simulation results show that the proposed AF-SCMA provides remarkable performance in terms of throughput and packet loss ratio (PLR), and can benefit from the received signal power unbalance.

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Deep Reinforcement Learning-Based Multi-Access in Massive Machine-Type Communication

Ravi,

Lourenço,

Curado

et al. 2024

IEEE Access

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A throughput study of grant-free multiple access for massive wireless communications

Cited by 7 publications

References 6 publications

High-Reliability and Low-Latency Wireless Communication for Internet of Things: Challenges, Fundamentals, and Enabling Technologies

High-Reliability and Low-Latency Wireless Communication for Internet of Things: Challenges, Fundamentals, and Enabling Technologies

Asynchronous Flipped Grant-Free SCMA for Satellite-Based Internet of Things Communication Networks

Deep Reinforcement Learning-Based Multi-Access in Massive Machine-Type Communication

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