scholarly journals Adaptive ML-Based Frame Length Optimisation in Enterprise SD-WLANs

2020 ◽  
Vol 28 (4) ◽  
pp. 850-881 ◽  
Author(s):  
Estefanía Coronado ◽  
Abin Thomas ◽  
Roberto Riggio
Keyword(s):  
Performance Indicators ◽  
Optimization Problem ◽  
Local Area Networks ◽  
Wireless Systems ◽  
Local Area ◽  
Network Architectures ◽  
Frame Size ◽  
Frame Length ◽  
Average Improvement ◽  
Standard Frame

Abstract Software-Defined Networking (SDN) is gaining a lot of traction in wireless systems with several practical implementations and numerous proposals being made. Despite instigating a shift from monolithic network architectures towards more modulated operations, automated network management requires the ability to extract, utilise and improve knowledge over time. Beyond simply scrutinizing data, Machine Learning (ML) is evolving from a simple tool applied in networking to an active component in what is known as Knowledge-Defined Networking (KDN). This work discusses the inclusion of ML techniques in the specific case of Software-Defined Wireless Local Area Networks (SD-WLANs), paying particular attention to the frame length optimization problem. With this in mind, we propose an adaptive ML-based approach for frame size selection on a per-user basis by taking into account both specific channel conditions and global performance indicators. By relying on standard frame aggregation mechanisms, the model can be seamlessly embedded into any Enterprise SD-WLAN by obtaining the data needed from the control plane, and then returning the output back to this in order to efficiently adapt the frame size to the needs of each user. Our approach has been gauged by analysing a multitude of scenarios, with the results showing an average improvement of 18.36% in goodput over standard aggregation mechanisms.

WDM Local-Area Networks

2021 ◽  
pp. 235-298
Author(s):  
Debasish Datta
Keyword(s):  
Local Area Networks ◽  
Local Area ◽  
Multihop Networks ◽  
Network Architectures ◽  
Star Topology ◽  
Tunable Receiver

WDM-based broadcast-and-select transmission over optical passive-star topology can significantly enhance the speed of optical LANs/MANs. This type of optical LAN/MAN (or simply WDM LAN) can function using a variety of network architectures. In particular, WDM LANs can transmit packets between two nodes using direct or single-hop transmission or through intermediate nodes using multihop transmission, leading to broadly two types of network architectures: single-hop and multihop. The nodes in WDM LANs can employ two types of transmitters and receivers: tunable transmitter (TT) or fixed transmitter (FT) and tunable receiver (TR) or fixed receiver (FR), giving four types of WDM transceiver configurations: TT-TR, TT-FR, FT-TR, and FT-FR. Of the four configurations, the first three can realize single-hop communication, while the fourth generally leads to multihop networks. In this chapter, we describe various types of passive-star-based WDM LANs and examine their salient performance features. (141 words)

scholarly journals Extended Distributed Suboptimal Channel Assignment Algorithm Based Channel Assignment for Wireless Local Area Networks in a Multi Agent Environment

2019 ◽  
Vol 9 (1) ◽  
pp. 1438-1441
Keyword(s):  
Ieee 802.11 ◽  
Channel Assignment ◽  
Optimization Problem ◽  
Channel Allocation ◽  
Local Area Networks ◽  
Local Area ◽  
Wireless Local Area Networks ◽  
Assignment Algorithm ◽  
Tree Optimization ◽  
Multi Agent

Due to the universal use of IEEE 802.11 – based networks, the systematic positioned of Wireless Local Area Networks (WLANs) come to be a Challenge. With the intense admiration and stationed of WLANs, well organized administration of wireless bandwidth is elegantly a major progressive. The advanced techniques upgrade the utilization of wireless bandwidth in the factors of wireless local area networks (WLANs) employing advanced channel allocation techniques between Interfering Access Points (Aps). This work formalizes the channel assignment as a multiagent hampering optimization problem in a multi agent environment and intend a latest collective medium assignment procedure called Extended Distributed Suboptimal Channel Assignment (EDSCA), which utilizes Distributed Pseudo tree optimization (DPOP).

Vertical Handover Decision Algorithm for Heterogeneous Cellular-WLAN Networks

MACRo 2015 ◽  
2015 ◽  
Vol 1 (1) ◽  
pp. 1-12 ◽  
Author(s):  
Zsolt Alfréd Polgár ◽  
Andrei Ciprian Hosu ◽  
Zsuzsanna Ilona Kiss ◽  
Mihály Varga
Keyword(s):  
Local Area Networks ◽  
Local Area ◽  
Vertical Handover ◽  
Wireless Local Area Networks ◽  
Traffic Load ◽  
Network Architectures ◽  
System Efficiency ◽  
Decision Algorithm ◽  
High System ◽  
Multi Access

AbstractMulti-access and heterogeneous wireless communications are considered to be one of the solutions for providing generalized mobility, high system efficiency and improved user experience, which are important characteristics of the Next Generation Networks. This paper proposes a Vertical Handover (VHO) decision algorithm for heterogeneous network architectures which integrate both cellular networks and Wireless Local Area Networks (WLANs). The cellular-WLAN and WLAN-WLAN VHO decisions are taken based on parameters which characterize both the coverage and the traffic load of the WLANs. Computer simulations performed in complex scenarios show that the proposed algorithm ensures better performance compared to “classical” VHO decision algorithms.

scholarly journals A Novel QoS-Aware ARQ Scheme for Multi-User Transmissions in IEEE802.11ax WLANs

Electronics ◽  
2020 ◽  
Vol 9 (12) ◽  
pp. 2065
Author(s):  
Cong Lu ◽  
Bin Wu ◽  
Lei Wang ◽  
Zhiwei Wei ◽  
Yu Tang
Keyword(s):  
Optimization Problem ◽  
Loss Rate ◽  
Local Area Networks ◽  
Local Area ◽  
Channel Noise ◽  
Media Access Control ◽  
Media Access ◽  
Arq Schemes ◽  
Selection Of

The latest IEEE 802.11ax protocol has been launched to provide efficient services by adopting multi-user (MU) transmission technology. However, the MU transmissions in the aggregation-enabled wireless local area networks (WLANs) face two drawbacks when adopting the existing automatic repeat request (ARQ) schemes. (1) The failed packets caused by the channel noise can block the submission of subsequent packets and the transmission of queued ones. (2) When the lengths of aggregate media access control protocol data units (A-MPDU) transmitted by different users are varied, dummy bits should be added to the shorter frames to align the transmission duration. These drawbacks degrade the quality of service (QoS) performances, such as throughput, latency, and packet loss rate. In this paper, a novel QoS-aware backup padding ARQ (BP-ARQ) scheme for MU transmissions in the IEEE802.11ax WLANs is proposed to address these problems. The proposed scheme utilizes backups of selected packets instead of dummy bits to align the duration and to supress the influence of channel noise. An optimization problem that aims to improve the blocking problem of the failed packets is derived to determine the selection of packets. The promotion of the proposed scheme is well demonstrated by the simulations in NS-3.

Link-Level Simulator for Wireless local Area Network

2018 ◽  
Vol 6 (7) ◽  
pp. 314
Author(s):  
Chaithra. H. U ◽  
Vani H.R
Keyword(s):  
Wireless Local Area Network ◽  
Local Area Network ◽  
Local Area Networks ◽  
Local Area ◽  
Long Term Evolution ◽  
Wireless Local Area Networks ◽  
Area Network ◽  
Network Simulator ◽  
Term Evolution

Now a days in Wireless Local Area Networks (WLANs) used in different fields because its well-suited simulator and higher flexibility. The concept of WLAN  with  advanced 5th Generation technologies, related to a Internet-of-Thing (IOT). In this project, representing the Network Simulator (NS-2) used linked-level simulators for Wireless Local Area Networks and still utilized IEEE 802.11g/n/ac with advanced IEEE 802.11ah/af technology. Realization of the whole Wireless Local Area Networking linked-level simulators inspired by the recognized Vienna Long Term Evolution- simulators. As a outcome, this is achieved to link together that simulator to detailed performances of Wireless Local Area Networking with Long Term Evolution, operated in the similar RF bands. From the advanced 5th Generation support cellular networking, such explore is main because different coexistences scenario can arise linking wireless communicating system to the ISM and UHF bands.

Módulo de Capacitación Básica en Redes LAN para la Fundación Universidad Autónoma de Colombia

2013 ◽  
Vol 9 (16) ◽  
pp. 33-43
Author(s):  
Álvaro Javier Carrillo Hernández ◽  
Joan Katherine Zorovich Gutiérrez ◽  
Javier Enrique Arévalo Peña
Keyword(s):  
Local Area Networks ◽  
Local Area

Este articulo presenta el proceso de desarrollo de un módulo de capacitación en redes de área local (LAN: Local Area Networks), cuyos contenidos son de fácil entendimiento, que es posible tomarlo en un periodo muy corto de tiempo, que no depende directamente de un tutor para poderse realizar y que además tiene incluido un desarrollo práctico para la utilización del Laboratorio de Telemática de Fundación Universidad Autónoma de Colombia. Para poderlo realizar fue necesaria una indagación previa acerca del aprendizaje, la selección un plan temático, realizar la correspondiente recopilación bibliográfica para la creación de un marco teórico que fuese acorde con la teoría del aprendizaje y crear unas prácticas de laboratorio adecuadas que reforzaran el conocimiento adquirido. Como resultado se obtuvo un software didáctico que contiene todo el marco teórico distribuido en temáticas y prácticas de laboratorio que conjugan la parte teórica con la parte práctica.

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