Hybrid Slotted-CSMA/CA-TDMA for Efficient Massive Registration of IoT Devices

Shahin, Nurullah; Ali, Rashid; Kim, Young‐Tak

doi:10.1109/access.2018.2815990

Cited by 49 publications

(25 citation statements)

References 18 publications

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“…Apart from packet transmission, CSMA/CA is also used in the wireless station registration process with the access point (AP) [14]. The registration process is performed by the station prior to any data packet transmission.…”

Section: Ieee 80211 Collision Reduction Mechanismsmentioning

confidence: 99%

Pseudorandom sequence contention algorithm for IEEE 802.11ah based internet of things network

et al. 2020

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The IEEE 802.11ah standard relies on the conventional distributed coordination function (DCF) as a backoff selection method. The DCF is utilized in the contention-based period of the newly introduced medium access control (MAC) mechanism, namely restricted access window (RAW). Despite various advantages of RAW, DCF still utilizes the legacy binary exponential backoff (BEB) algorithm, which suffers from a crucial disadvantage of being prone to high probability of collisions with high number of contending stations. To mitigate this issue, this paper investigates the possibility of replacing the existing exponential sequence (i.e., as in BEB) with a better pseudorandom sequence of integers. In particular, a new backoff algorithm, namely Pseudorandom Sequence Contention Algorithm (PRSCA) is proposed to update the CW size and minimize the collision probability. In addition, the proposed PRSCA incorporates a different approach of CW freezing mechanism and backoff stage reset process. An analytical model is derived for the proposed PRSCA and presented through a discrete 2-D Markov chain model. Performance evaluation demonstrates the efficiency of the proposed PRSCA in reducing collision probability and improving saturation throughput, network throughput, and access delay performance.

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Section: Ieee 80211 Collision Reduction Mechanismsmentioning

confidence: 99%

Pseudorandom sequence contention algorithm for IEEE 802.11ah based internet of things network

et al. 2020

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“…However, the throughput of low-rate nodes can be severely restrained due to its size of packet always being suppressed, even though the highest rate node always transmits the packet with the Maximum Transmission Unit (MTU). Recently, a hybrid slotted-CSMA/CA time-division multiple access (TDMA) has been proposed in [27], which focuses on solving the massive registration of IoT devices at a single centralized AP.…”

Section: Related Workmentioning

confidence: 99%

Decoupling-Based Channel Access Mechanism for Improving Throughput and Fairness in Dense Multi-Rate WLANs

2019

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Legacy IEEE 802.11 Medium Access Control (MAC) adopts the Distributed Coordination Function (DCF) mechanism, which provides the same access opportunity for all contenders. However, in dense multi-rate Wireless Local Area Networks (WLANs), the pure distributed control mechanism will cause high collision rate and performance anomaly, which results in low network utilization and wasting valuable channel resources. In this paper, we present a decoupling MAC mechanism (DMAC) based on the idea of contention/reservation to reduce collision and realize collision free data transmission. In proposed mechanism, the channel access time is partitioned into channel contention process and data transmission process. The proposed algorithm makes full use of the distributed random channel access mechanism and performs a centralized collision-free data transmission. Wherein, we also design an adaptive algorithm to adjust the length of the contention period to improve the channel utilization. Furthermore, we further propose two airtime fairness algorithms Improve-DMAC1 (I-DMAC1) and Improve-DMAC2 (I-DMAC2) for delay sensitive network and high throughput network scenarios, respectively, to solve the performance anomaly in multi-rate WLANs, based on DMAC. We verify the effectiveness of these decoupling algorithms through extensive simulations. Moreover, the simulation results show that the proposed algorithms achieve better performance than the 802.11 standard and other protocols.

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“…The authors of [ 12 ] provide numerous improvements of the link set-up process. Specifically, they propose using a modification of the random access procedure for transmission of

, based on the Sift distribution [ 13 ], and develop a closed-form analytical expression of the expected number of

.…”

Section: Related Papersmentioning

confidence: 99%

What Is the Fastest Way to Connect Stations to a Wi-Fi HaLow Network?

Bankov

Khorov

Lyakhov

et al. 2018

Sensors

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Wi-Fi HaLow is an adaptation of the widespread Wi-Fi technology for the Internet of Things scenarios. Such scenarios often involve numerous wireless stations connected to a shared channel, and contention for the channel significantly affects the performance in such networks. Wi-Fi HaLow contains numerous solutions aimed at handling the contention between stations, two of which, namely, the Centralized Authentication Control (CAC) and the Distributed Authentication Control (DAC), address the contention reduction during the link set-up process. The link set-up process is special because the access point knows nothing of the connecting stations and its means of control of these stations are very limited. While DAC is self-adaptive, CAC does require an algorithm to dynamically control its parameters. Being just a framework, the Wi-Fi HaLow standard neither specifies such an algorithm nor recommends which protocol, CAC or DAC, is more suitable in a given situation. In this paper, we solve both issues by developing a novel robust close-to-optimal algorithm for CAC and compare CAC and DAC in a vast set of experiments.

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Hybrid Slotted-CSMA/CA-TDMA for Efficient Massive Registration of IoT Devices

Cited by 49 publications

References 18 publications

Pseudorandom sequence contention algorithm for IEEE 802.11ah based internet of things network

Pseudorandom sequence contention algorithm for IEEE 802.11ah based internet of things network

Decoupling-Based Channel Access Mechanism for Improving Throughput and Fairness in Dense Multi-Rate WLANs

What Is the Fastest Way to Connect Stations to a Wi-Fi HaLow Network?

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