The Switched Local Area Networks’ Delay Problem

2013 ◽  
pp. 47-70
Author(s):  
Monday O. Eyinagho ◽  
Samuel O. Falaki
Keyword(s):  
Communication Networks ◽  
Response Times ◽  
Local Area Networks ◽  
Packet Delay ◽  
Stochastic Approach ◽  
Local Area ◽  
Maximum Delay ◽  
Formal Basis ◽  
Packet Switch ◽  
End To End

A large number of installed local area networks are sluggish in terms of speed of uploading and downloading of information. Researchers have, therefore, proposed the need for such networks to be designed with specified maximum end-to-end delay. This is because, if the maximum packet delay between any two nodes of a network is not known, it is impossible to provide a deterministic guarantee of worst case response times of packets’ flows. Therefore, the need for analytic and formal basis for designing such networks becomes very imperative. In this regard, this chapter has discussed the switched local area networks’ delay problem and related issues. It compared the two principal approaches for determining the end-to-end response times of flows in communication networks – stochastic approach and deterministic approach. The chapter goes on to demonstrate the superiority of the latter approach by using it to develop and validate the goodness of a general maximum delay packet switch model.

scholarly journals Reliability Aware Multiple Path Installation in Software-Defined Networking

Electronics ◽  
2021 ◽  
Vol 10 (22) ◽  
pp. 2820
Author(s):  
Syed Mohsan Raza ◽  
Shohreh Ahvar ◽  
Rashid Amin ◽  
Mudassar Hussain
Keyword(s):  
Communication Networks ◽  
Computation Time ◽  
Packet Delay ◽  
Software Defined Networking ◽  
Flow Rule ◽  
Link Failures ◽  
Multiple Path ◽  
Services Delivery ◽  
Multiple Paths ◽  
End To End

Link failures frequently occur in communication networks, which negatively impacts network services delivery. Compared to traditional distributed networks, Software-Defined Networking (SDN) provides numerous benefits for link robustness to avoid services unavailability. To cope with link failures, the existing SDN approaches compute multiple paths and install corresponding flow rules at network switches without considering the reliability value of the primary computed path. This increases computation time, traffic overhead and end-to-end packets delay. This paper proposes a new approach called Reliability Aware Multiple Path Flow Rule (RAF) that calculates links reliability and installs minimum flow rules for multiple paths based on the reliability value of the primary path. RAF has been simulated, evaluated and compared with the existing approaches. The simulation results show that RAF performs better than the existing approaches in terms of computation overhead at the controller and reduces end-to-end packet delay and traffic overhead for flow rules installation.

scholarly journals Towards Enabling Multihop Wireless Local Area Networks for Disaster Communications

2021 ◽  
Vol 2021 ◽  
pp. 1-14
Author(s):  
Muhammad Bux Laghari ◽  
Hamayoun Shahwani ◽  
Syed Attique Shah ◽  
Raja Asif Wagan ◽  
Zahid Rauf ◽  
...  
Keyword(s):  
Local Area Networks ◽  
Relay Networks ◽  
Local Area ◽  
Wireless Local Area Networks ◽  
Coverage Area ◽  
Transmission Rates ◽  
Channel Conditions ◽  
Multihop Relay Networks ◽  
End To End ◽  
The Impact

xCalamities such as earthquakes and tsunami affect communication services by devastating the communication network and electrical infrastructure. Multihop relay networks can be deployed to restore the communication environment quickly in catastrophe-stricken areas. However, performance in terms of throughput is affected by deploying the relay networks. In wireless local area networks (WLANs), the primary purpose of multiband transmission employing multihop relay networks is to increase the throughput and reduce the latency. In the future, wireless networks are believed to carry high throughput, more data rates, and less latency by expanding bandwidth-demanding applications. Simultaneous multiband transmission in WLAN systems is considered to increase the coverage area without power escalation. Due to the inherent characteristics of different bands and channel conditions, transmission rates tend to be different. The impact of such conditions may cater to the disproportional distribution of data among bands, causing some of the bands to be overwhelmed, which incurs buffer overflow and packet loss. In contrast, the channel capacity of some of the bands remains underutilized. In this paper, we consider the channel conditions and transmission rates of each band on either side of the relay to address the problems mentioned above. Furthermore, this paper proposes a load distribution-based end-to-end traffic scheduling technique to improve system performance. The simulation results demonstrate the effectiveness of our proposed method with maximizing throughput and minimizing end-to-end delay.

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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