scholarly journals Introducing a Mobility Access Category for IEEE 802.11e

2020 ◽  
Vol 9 (5) ◽  
pp. 1610-1614
Keyword(s):  
Quality Of Service ◽  
Wireless Network ◽  
Ieee 802.11E ◽  
Network Simulator ◽  
Mobile Nodes ◽  
Mobile Stations ◽  
Simulation Scenario ◽  
Simulation Results ◽  
The Impact

With traffic increase in a wireless network beyond its capacity and as the number of connected devices continue to grow, the quality of service (QoS) degrades. In this paper we study the impact of mobility on throughput in the case of an infrastructure wireless network using IEEE 802.11 Wi-Fi standard. Since we found in the literature that the mobility of stations can have an impact on the quality of service, we try to remedy to this by implementing a new access category reserved for mobile stations. First we compare the throughput between static and mobile nodes, both connected to a QoS station. Then we propose our new model that consists of adding a new access category used by mobile nodes regardless of their traffic category. The study was made by simulating different scenarios using Network Simulator-3 (NS-3). We found that the throughput may vary depending on the simulation scenario. The simulation results show that with the proposed solution the mobile nodes can have a better throughput.

scholarly journals A Comprehensive Analysis of QoS in Wired and Wireless SDN Based on Mobile IP

2021 ◽  
Vol 13 (5) ◽  
pp. 18-28
Author(s):  
Nazrul Islam ◽  
◽  
Md. Habibur Rahman ◽  
Mostofa Kamal Nasir
Keyword(s):  
Quality Of Service ◽  
Wireless Network ◽  
Task Force ◽  
Mobile Ip ◽  
Mobile Internet ◽  
Large Network ◽  
Mobile Nodes ◽  
Mobile Internet Protocol ◽  
Primary Focus

Software-Defined Networking (SDN) is the new network paradigm whose primary focus is to create a dynamic, scalable and flexible network. It provides programmable functions for implementation of network configuration management. The demand for wireless network functionality is rising simultaneously. Mobility management for a large network is an issue in Internet Engineering Task Force (IETF). There are also a number of solutions to support mobility within the network. The Mobile Internet Protocol (MIP) is used for managing mobility. Furthermore, for the SDN platform, mobility adds roaming capability for mobile nodes in the software-defined wireless network (SDWN). In the wired scenario, SDN has different capabilities to deliver network services according to the fixed node. This study provides a quality of service (QoS) analysis in both SDN and SDWN. Mininet WiFi and RYU network emulator as a controller is used to implement the mobility API. The random walk model is applied as mobility functionality toward the final nodes. Moreover, several QoS measurement matrices are analyzed according to the network topology. At the end, round trip time (RTT), cumulative distributed function (CDF), packet loss and throughput are analyzed for quality of service comparable in the SDN and SDWN scenarios according to the MIP.

scholarly journals QOS AND DEFENSE ENHANCEMENT USING BLOCK CHAIN FOR FLY WIRELESS NETWORKS

2019 ◽  
Vol 01 (01) ◽  
pp. 1-13 ◽  
Author(s):  
Bhalaji N
Keyword(s):  
Wireless Networks ◽  
Quality Of Service ◽  
Trust Management ◽  
Security Threats ◽  
Network Simulator ◽  
Trust Evaluation ◽  
Selfish Nodes ◽  
Mobile Nodes ◽  
Block Chain

The autonomous mobile nodes framing an instantaneous network, utilizing the nearby available device that volunteer in establishing network is coined as the fly wire network. These adhoc type of network framed simultaneously are prone to various vulnerabilities, developing alterations in the information’s or hacking of information’s or the blocking of services. These security threats causing losses in the information transmitted, makes it necessary for the trust evaluation of the nodes to identify the selfish nodes. So the paper proposes the block chain trust management of nodes to avoid the vulnerabilities in the transmission path, enhancing the performance of the network. The performance of the proposed method is validated in the network simulator –II to ensure its capability in terms of the quality of service and the security (defense).

scholarly journals Distortion-Based Slice Level Prioritization for Real-Time Video over QoS-Enabled Wireless Networks

2012 ◽  
Vol 2012 ◽  
pp. 1-9
Author(s):  
Ismail A. Ali ◽  
Martin Fleury ◽  
Mohammed Ghanbari
Keyword(s):  
Wireless Networks ◽  
Quality Of Service ◽  
Real Time ◽  
Wireless Lan ◽  
Video Quality ◽  
Ieee 802.11E ◽  
Video Streams ◽  
The Impact ◽  
Prioritization Scheme

This paper presents a prioritization scheme based on an analysis of the impact on objective video quality when dropping individual slices from coded video streams. It is shown that giving higher-priority classified packets preference in accessing the wireless media results in considerable quality gain (up to 3 dB in tests) over the case when no prioritization is applied. The proposed scheme is demonstrated for an IEEE 802.11e quality-of-service- (QoS-) enabled wireless LAN. Though more complex prioritization systems are possible, the proposed scheme is crafted for mobile interactive or user-to-user video services and is simply implemented within the Main or the Baseline profiles of an H.264 codec.

Distributed TXOP Allocation Scheme in IEEE 802.11e Wireless LANs

2013 ◽  
Vol 284-287 ◽  
pp. 2904-2907
Author(s):  
Sunmyeng Kim
Keyword(s):  
Quality Of Service ◽  
Wireless Lans ◽  
Service Differentiation ◽  
Ieee 802.11E ◽  
Multimedia Traffic ◽  
Allocation Scheme ◽  
Delay Bound ◽  
Transmission Opportunity ◽  
Simulation Results

Multimedia traffic is expected to be one of the most important traffic types in wireless LANs. However, multimedia traffic is very sensitive to delay so that the traffic has to be transmitted to receivers within its delay bound. The IEEE 802.11e EDCA (Enhanced Distributed Channel Access) defines a TXOP (Transmission Opportunity) parameter to provide service differentiation and QoS (Quality of Service) of the traffic. A station can continuously transmit multiple packets for the duration of a TXOP. When stations support multimedia applications with different QoS requirements, fairness problem occurs. In order to alleviate the fairness problem, we propose a distributed TXOP allocation scheme based on the delay bound. In the proposed scheme, a station checks the delay bound of each data packet in the queue, and allocates its TXOP value to guarantee the delay bounds of all the packets in the queue. Simulation results show that the proposed scheme outperforms other TXOP allocation schemes.

scholarly journals Controlling Contention Window to Ensure QoS for Multimedia Data in Wireless Network

2020 ◽  
Vol 2020 (1) ◽  
Author(s):  
Hai-Anh Ngo ◽  
Pham Thanh Giang
Keyword(s):  
Quality Of Service ◽  
Wireless Network ◽  
Multimedia Data ◽  
Contention Window ◽  
Ieee 802.11E ◽  
Data Flows ◽  
Different Types

The IEEE-802.11e standard was published withthe goal of ensuring quality of service, especially with mul-timedia data. However, this standard only assigns differentpriorities for different types of data but does not controlthe sharing of bandwidth among different data flows. In thispaper, we will propose a method of sharing bandwidth forproportional data flows and controlling Contention Windowof each priority flow to achieve that ratio.  

scholarly journals Data Collection and Performance Analysis of Wireless Communication to improve Quality of Service

2019 ◽  
Vol 8 (4) ◽  
pp. 11819-11823
Keyword(s):  
Quality Of Service ◽  
Ad Hoc ◽  
Mobile Ad Hoc Network ◽  
Network Routing ◽  
Traffic Load ◽  
Delivery Ratio ◽  
Present System ◽  
Network Simulator ◽  
Mobile Nodes

A wirelessly appointed system is an accumulation of progressively framing some of moving hubs or mobile nodes or a transitory non-foundation organize without the utilization of any present system foundation. Because of the constrained range of correspondence between portable hubs in the impromptu organize, a few system expectations might be required to send a packet starting with one hub then onto the next in the wireless system. A scope of particular routing conventions have been depicted in most recent years that address multi-hub wirelessly appointed system and their proficiency issues are examined. In this paper, use the NS2.34 network simulator to compare Mobile Ad-Hoc network routing protocols DSDV, AODV and DSR. In this investigation of the effectiveness of routing conventions in systems when changing association parameters (traffic load, portability, arrange size). This archive experiences broad examination among routing performance for AODV, DSDV, DSR routing. For model, packet delivery ratio, delay, number of packet sent, number of packets received, throughput are analyze and also to look at these conventions to check the best routing conventions for Quality of Service in the network

Demand of Wireless Network and Security in Current Research

2015 ◽  
Vol 14 (6) ◽  
pp. 5809-5813
Author(s):  
Abhishek Prabhakar ◽  
Amod Tiwari ◽  
Vinay Kumar Pathak
Keyword(s):  
Wireless Networks ◽  
Quality Of Service ◽  
Wireless Network ◽  
Network Performance ◽  
Wireless Security ◽  
Human Intervention ◽  
Unauthorized Access ◽  
Quality Of Service Parameters ◽  
Wireless Infrastructure

Wireless security is the prevention of unauthorized access to computers using wireless networks .The trends in wireless networks over the last few years is same as growth of internet. Wireless networks have reduced the human intervention for accessing data at various sites .It is achieved by replacing wired infrastructure with wireless infrastructure. Some of the key challenges in wireless networks are Signal weakening, movement, increase data rate, minimizing size and cost, security of user and QoS (Quality of service) parameters... The goal of this paper is to minimize challenges that are in way of our understanding of wireless network and wireless network performance.

scholarly journals On the Design of Efficient Hierarchic Architecture for Software Defined Vehicular Networks

Sensors ◽  
2021 ◽  
Vol 21 (4) ◽  
pp. 1400
Author(s):  
Muhammad Adnan ◽  
Jawaid Iqbal ◽  
Abdul Waheed ◽  
Noor Ul Amin ◽  
Mahdi Zareei ◽  
...  
Keyword(s):  
Cloud Computing ◽  
Quality Of Service ◽  
Traffic Management ◽  
Vehicular Networks ◽  
Scheduling Algorithm ◽  
Main Research ◽  
First Come First Serve ◽  
Computing Framework ◽  
Simulation Results

Modern vehicles are equipped with various sensors, onboard units, and devices such as Application Unit (AU) that support routing and communication. In VANETs, traffic management and Quality of Service (QoS) are the main research dimensions to be considered while designing VANETs architectures. To cope with the issues of QoS faced by the VANETs, we design an efficient SDN-based architecture where we focus on the QoS of VANETs. In this paper, QoS is achieved by a priority-based scheduling algorithm in which we prioritize traffic flow messages in the safety queue and non-safety queue. In the safety queue, the messages are prioritized based on deadline and size using the New Deadline and Size of data method (NDS) with constrained location and deadline. In contrast, the non-safety queue is prioritized based on First Come First Serve (FCFS) method. For the simulation of our proposed scheduling algorithm, we use a well-known cloud computing framework CloudSim toolkit. The simulation results of safety messages show better performance than non-safety messages in terms of execution time.

Shortest path establishment approaches for static and dynamic mobile nodes with quality of service

2018 ◽  
Vol 14 (1) ◽  
pp. 1 ◽  
Author(s):  
S. Sundar ◽  
Aritra Basu ◽  
Arunava Kar ◽  
R. Kumar ◽  
Harish Mallikarjun Kittur
Keyword(s):  
Quality Of Service ◽  
Shortest Path ◽  
Mobile Nodes

scholarly journals HOSPITALITY MANAGEMENT AS A PREREQUISITE OF EFFECTIVE TOURISM DEVELOPMENT IN UKRAINE

2021 ◽  
Author(s):  
Olena Khytra
Keyword(s):  
Quality Of Service ◽  
Corporate Culture ◽  
Management System ◽  
Hospitality Industry ◽  
Professional Competence ◽  
Tourism Industry ◽  
Hospitality Management ◽  
Social Orientation ◽  
The Impact

The hospitality industry acquires the features of an integrative industry, which combines material resources and intangible factors to meet the needs of modern man for comfortable travel and recreation. Hospitality is interpreted as a complex economic, social, cultural, psychological phenomenon, the impact of which on the development of the tourism industry determines the effect of synergy from the combination of tourist resources and quality of service. The author of article proposes to consider hospitality management as a multilevel dynamic management system for the process of providing services to tourists and vacationers, based primarily on the principles of humanism, tolerance, personalization of hospitality, respect for cultural diversity, priority to meet human needs for quality recreation and physical strength as well as cultural self-development. The social orientation of this system to some extent balances the commercial, purely pragmatic aspect of managing the development of tourism enterprises. A holistic model of hospitality management is based on a harmonious combination of four concepts. They are humanitarian, technological, functional and commercial. The system-forming component of the hospitality sector is a mechanism for managing consumer behaviour, which ensures an optimal balance of supply and demand in the market of hospitality services. The specifics of service in the hospitality industry is that the quality of service affects the emotional perception of tourists in the area and, accordingly, affects the image of the state. Therefore, the mechanism for implementing the service policy should be established through public administration measures. Among the key areas of hospitality management development is the formation of a rational organizational structure, improvement of hospitality marketing and support of corporate culture, the values of which are adequate to the socio-cultural environment of the hospitality industry. The specificity of the hospitality industry is also that an important role in ensuring competitiveness is played by an attractive brand, which stipulates the allocation in the management system of such a component as brand management. Considerable attention should be paid to the innovative development of hospitality enterprises and the constant improvement of professional competence of managers of socio-cultural activities.

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