Throughput enhancement of restricted access window for uniform grouping scheme in IEEE 802.11ah

Nawaz, Naveed; Hafeez, Maryam; Zaidi, Syed Ali Raza; McLernon, Des; Ghogho, Mounir

doi:10.1109/icc.2017.7996899

Cited by 47 publications

(29 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In [95], the authors propose a strategy for the allocation of a RAW slot duration based on the size of the group. Larger groups of devices are allocated a relatively short RAW slot duration per RAW slot group and vice versa.…”

Section: ) Uniform Grouping In Raw For 80211ahmentioning

confidence: 99%

Media Access Control in Large-Scale Internet of Things: A Review

2020

View full text Add to dashboard Cite

The Media Access Control (MAC) serves as an imperative part of wireless communication networks which enables efficient provisioning of communication resources for device interconnectivity and ensures Quality of Service (QoS). The emergence of Large-Scale Internet of Things (LS-IoT) networks is characterised by a multi-domain distributed wireless communication network that provides end-to-end connectivity for a multitude of active heterogeneous Machine-to-Machine (M2M) devices. The nature of LS-IoT networks requires robust and scalable MAC protocols to manage concurrent, dynamic and massive media access and resource allocation. Several reviews have been conducted on MAC protocols with a handful of them focused on LS-IoT networks or massive M2M networks. In this paper, the characterisation of LS-IoT networks and the MAC component are extensively discussed delineating the impact of LS-IoT on the MAC. Emerging research issues on the MAC for LS-IoT networks including high collision probability, high control overheads, spectrum constraints, timing constraints, hardware constraints, energy consumption and hidden terminals are discussed. Some recently proposed solutions in literature for enhancing the MAC in LS-IoT networks are discussed under LS-IoT specific MAC protocol enhancement classifications. The contributions and drawbacks of the recent solutions in literature are discussed and summarised. The Future direction that is oriented towards the use of virtualisation within the framework of Network Function Virtualisation (NFV) and Software-Defined Networking (SDN) approaches is proposed. This is aimed at providing a dynamic distributed multidimensional MAC resource scaling approach for LS-IoT access network devices to ensure a robust and effective MAC for massive M2M devices in LS-IoT networks. INDEX TERMS Large-scale Internet of Things (LS-IoT), machine-to-machine (M2M) communication, media access control (MAC), wireless networks.

show abstract

Section: ) Uniform Grouping In Raw For 80211ahmentioning

confidence: 99%

Media Access Control in Large-Scale Internet of Things: A Review

2020

View full text Add to dashboard Cite

show abstract

“…Regarding throughput optimization, Tian et al [ 19 , 20 ] developed a real-time Traffic-Adaptive RAW Optimization Algorithm (TAROA) that improves uplink throughput in dynamic and heterogeneous WSNs. Nawaz et al [ 18 ] argue that the duration of each RAW slot should be chosen according to the size of the group, which has proven to increase uplink throughput. Chang et al [ 25 ] proposed a load-balanced sensor grouping for RAW based on set partitioning that assumes that the Access Point (AP) knows the (static) traffic demand of each station.…”

Section: Related Workmentioning

confidence: 99%

Performance Evaluation of IEEE 802.11ah Networks With High-Throughput Bidirectional Traffic

Šljivo

Kerkhove

Tian

et al. 2018

Sensors

View full text Add to dashboard Cite

So far, existing sub-GHz wireless communication technologies focused on low-bandwidth, long-range communication with large numbers of constrained devices. Although these characteristics are fine for many Internet of Things (IoT) applications, more demanding application requirements could not be met and legacy Internet technologies such as Transmission Control Protocol/Internet Protocol (TCP/IP) could not be used. This has changed with the advent of the new IEEE 802.11ah Wi-Fi standard, which is much more suitable for reliable bidirectional communication and high-throughput applications over a wide area (up to 1 km). The standard offers great possibilities for network performance optimization through a number of physical- and link-layer configurable features. However, given that the optimal configuration parameters depend on traffic patterns, the standard does not dictate how to determine them. Such a large number of configuration options can lead to sub-optimal or even incorrect configurations. Therefore, we investigated how two key mechanisms, Restricted Access Window (RAW) grouping and Traffic Indication Map (TIM) segmentation, influence scalability, throughput, latency and energy efficiency in the presence of bidirectional TCP/IP traffic. We considered both high-throughput video streaming traffic and large-scale reliable sensing traffic and investigated TCP behavior in both scenarios when the link layer introduces long delays. This article presents the relations between attainable throughput per station and attainable number of stations, as well as the influence of RAW, TIM and TCP parameters on both. We found that up to 20 continuously streaming IP-cameras can be reliably connected via IEEE 802.11ah with a maximum average data rate of 160 kbps, whereas 10 IP-cameras can achieve average data rates of up to 255 kbps over 200 m. Up to 6960 stations transmitting every 60 s can be connected over 1 km with no lost packets. The presented results enable the fine tuning of RAW and TIM parameters for throughput-demanding reliable applications (i.e., video streaming, firmware updates) on one hand, and very dense low-throughput reliable networks with bidirectional traffic on the other hand.

show abstract

“…The IEEE 802.11ah is an emerging wireless standard in sub-1 GHz license exempt bands for cost effective and range-extended communication. This standard adopts the grouping-based Medium Access Control (MAC) protocol to reduce the contention overhead [8]. Moreover, by utilizing the Multiple Input Multiple Output (MIMO) scheme, the IEEE 802.11ah based systems can utilize the benefits of spatial diversity to enhance the link capacity and to extend the coverage area [7].…”

Section: B Related Workmentioning

confidence: 99%

“…The AP then broadcasts beacons to different geographical locations by utilizing simple sectorized beams. The number of stations is further divided into different groups uniformly within the sectors [8]. Thus divided groups are assigned to different RAW slots for the data transmission and they spatially access the channel for data transmission towards the AP.…”

Section: Contributionsmentioning

confidence: 99%

Device Grouping for Fast and Efficient Channel Access in IEEE 802.11ah Based IoT Networks

Bhandari

Sharma

Wang

2018

2018 IEEE International Conference on Communications Workshops (ICC Workshops)

View full text Add to dashboard Cite

The recent advances in Internet of Things (IoT) have led to numerous emerging applications ranging from eHealthcare to industrial control, which often demand stringent Quality of Service (QoS) requirements such as low-latency and high system reliability. However, the ever-increasing number of connected devices in ultra-dense IoT networks and the dynamic traffic patterns increase the channel access delay and packet collision rate. In this regard, this paper proposes a sectorbased device grouping scheme for fast and efficient channel access in IEEE 802.11ah based IoT networks such that the total number of the connected devices within each sector is dramatically reduced. In the proposed framework, the Access Point (AP) divides its coverage area into different sectors, and then each sector is further divided into distinct groups based on the number of devices and their location information available from the cloud-center. Subsequently, individual groups within a sector are assigned to specific Random Access Window (RAW) slots, and the devices within distinct groups in different sectors access the allocated RAW slots by employing a spatial orthogonal access mechanism. The performance of the proposed sectorized device grouping scheme has been analyzed in terms of system delay and network throughput. Our simulation results show that the proposed scheme can significantly enhance the network throughput while simultaneously decreasing the system delay as compared to the conventional Distributed Coordination Function (DCF) and IEEE 802.11ah grouping scheme.

show abstract

Throughput enhancement of restricted access window for uniform grouping scheme in IEEE 802.11ah

Cited by 47 publications

References 11 publications

Media Access Control in Large-Scale Internet of Things: A Review

Media Access Control in Large-Scale Internet of Things: A Review

Performance Evaluation of IEEE 802.11ah Networks With High-Throughput Bidirectional Traffic

Device Grouping for Fast and Efficient Channel Access in IEEE 802.11ah Based IoT Networks

Contact Info

Product

Resources

About