QoE-based scheduling algorithm in WiMAX network (original) (raw)

A QoE-Based Scheduling Algorithm for UGS Service Class in WiMAX Network

2014

To satisfy the increasing demand for multimedia services in broadband Internet networks, the WiMAX (Worldwide Interoperability for Microwave Acces) technology has emerged as an alternative to the wired broadband access solutions. It provides an Internet connection to broadband coverage area of several kilometers in radius by ensuring a satisfactory quality of service (QoS), it's an adequate response to some rural or inaccessible areas. Unlike DSL (Digital Subscriber Line) or other wired technology, WiMAX uses radio waves and can provide point-to-multipoint (PMP) and point-to-point (P2P) modes. In parallel, it's observed that in the opposite of the traditional quality evaluation approaches, nowadays, current researches focus on the user perceived quality, the existing scheduling algorithms take into account the QoS and many other parameters, but not the Quality of Experience (QoE). In this paper, we present a QoE-based scheduling solution in WiMAX network in order to make the scheduling of the UGS connections based on the use of QoE metrics. Indeed, the proposed solution allows controlling the packet transmission rate so as to match with the minimum subjective rate requirements of each user. Simulation results show that by applying various levels of mean opinion score (MOS) the QoE provided to the users is improved in term of throughput, jitter, packet loss rate and delay.

An Improved UGS Scheduling with QoE Metrics in WiMAX Network

WiMAX (Worldwide Interoperability for Microwave Access) technology has emerged in response to the increasing demand for multimedia services in the internet broadband networks. WiMAX standard has defined five different scheduling services to meet the QoS (Quality of Service) requirement of multimedia applications and this paper investigates one specific scheduling service, i.e. UGS scheduling. In parallel, it was observed that in the difference of the traditional quality assessment approaches, nowadays, current researches are centered on the user perception of the quality, the existing scheduling approaches take into account the QoS, mobility and many other parameters, but do not consider the Quality of Experience (QoE). In order to control the packet transmission rate so as to match with the minimum subjective rate requirements of each user and therefore reduce packet loss and delays, an efficient scheduling approach has been proposed in this paper. The solution has been implemented and evaluated in the WiMAX simulation platform developed based on NS-2. Simulation results show that by applying various levels of MOS (Mean Opinion Score) the QoE provided to the users is enhanced in term of jitter, packet loss rate, throughput and delay. https://sites.google.com/site/ijcsis/

Design and Implementation of an Efficient Scheduling Algorithm for QoS Management in WiMAX

2014

Due to the costly spectrum and ever growing demand for multimedia services, it thus become important to optimise and design appropriate scheduling algorithms and channel management techniques to maximise throughput and QoS. In this paper, the IEEE 802.16e standard based Mobile WiMAX (Worldwide Interoperability for Microwave Access) system is explored for the purpose of Quality of Service provisioning. Since the standard does not specify a specific scheduling algorithm for polling services, hence a well thought out algorithm will be of great contribution to the area under investigation. An in-depth study of the Modified Deficit Round Robin (MDRR) scheduling algorithm has been provided. Modifications have been made to the existing scheduler and the refined new MDRR scheduler is implemented in OPNET Modeler. Results from the simulations obtained show that the designed algorithm works well with latency and throughput constraints as well as with the Quality of Service demands of the WiMA...

A Review on Quality of Services Scheduling Algorithms in WiMAX

— With the expanding interest of wireless access to the system the interest for good quality system has likewise expanded. This interest is expanded by the data transmission or bandwidth escalated applications like audio, video. So this expanded interest for good quality network, has further expanded the interest of outlining scheduling algorithm which gives high throughput and minimum delay and load. In this work, a comparative study of various scheduling algorithms, for example, First-In-First-Out (FIFO), Priority queue (PQ), Weight Fair Queuing (WFQ), Round Robin (RR), Deficit Round Robin (DRR), Modified Deficit Round Robin (MDRR), was done. The outcomes demonstrated that proper determination of scheduling algorithms can enhance the required quality of service for various activity sorts of users. The best scheduling algorithms in this assessment is resolved based on the base jitter, throughput and most extreme got activity for every servicing class and particular Application.

Analysis of Quality of Service (QoS) support for data traffic in WiMAX

This project is mainly to analyze the quality of service (QoS) of IEEE 802.16 WiMAX (Worldwide Interoperability for Microwave Access) in several aspects using Network Simulator-2. The main objective of this project is to analyze the average throughput and end-to-end delay in WiMAX network. Besides that, the performance of two types of protocol, which are the TCP and UDP agents, were indentified, compared and analyzed in the project. In addition, the performances of seven different types of modulations were also analyzed in the project. From this project, the QoS of WiMAX were successfully studied. Furthermore, it was found that the TCP agent is more reliable compared to UDP. Besides that, 64-QAM is the better modulation type in WiMAX network unless the range comes into considerations. It can provide a better performance compare to other available modulation types. As a conclusion, this project has proved that WiMAX was suitable for wide area network implementation and its connection was reliable until the last mile.

Quality-of-Service Scheduling for WiMAX Networks

2007

The broadband wireless world is moving towards the adoption of WiMAX (the commercial name of the IEEE 802.16 standard) as the standard for broadband wireless Internet access. This will open up a very large market for industry and operators, with a major impact on the way Internet access is conceived today. On the other hand, the emergence of innovative multimedia broadband services is going to impose severe Quality-of-Service (QoS) constraints on underlying network technologies. In this work, after a brief review of the IEEE 802.16 standard, we intend to present an in-depth discussion of its QoS support features. We point out the scheduling algorithm as the critical point in QoS provisioning over such networks, and discuss architectural and algorithmic solutions for an efficient support of multimedia flows. Performance measurements obtained from an experimental testbed are also presented. The paper concludes with a description of the key research challenges in the area, and provides a roadmap for the research in the field.

Improvement of the QoS for WiMAX Service Classes

Tem Journal Vol.2, No.2, 2013

Mobile users connected to the WiMAX technology can use five different service classes according to their different needs. In this paper we propose priority based uplink scheduling scheme for IEEE 802.16 standard that improves the QoS performances of the WiMAX service classes, especially when the number of connections gets higher. Essential QoS parameters like throughput, delay and jitter have been calculated using the ns-2 simulation tool and changing the number of the ertPS connections. Obtained results prove that our proposed uplink scheduling algorithm gives better results compared with so far known uplink scheduling mechanism.

Performance Evaluation of Different Scheduling Algorithms in WiMAX

Arxiv preprint arXiv: …, 2011

Worldwide Interoperability for Microwave Access (WiMAX) networks were expected to be the main Broadband Wireless Access (BWA) technology that provided several services such as data, voice, and video services including different classes of Quality of Services (QoS), which in turn were defined by IEEE 802.16 standard. Scheduling in WiMAX became one of the most challenging issues, since it was responsible for distributing available resources of the network among all users; this leaded to the demand of constructing and designing high efficient scheduling algorithms in order to improve the network utilization, to increase the network throughput, and to minimize the end-to-end delay.

Design of Scheduling Algorithm for QoS Management on WiMAX Networks

The apparition of high speed networks and the fast evolution of communication offer currently an unlimited access to an important number of applications. The applications constraints (videoconferencing, communications, VoIP, applications multimedia, etc…) are more complex for wireless systems because they require more constraints: high throughput, low packet loss, low latencies and gigue delays. All present flows in the WiMAX network must share the same medium capacity. Therefore, WiMAX is required to fulfill QoS requirements of any application and information passing over the network. Several mechanisms for QoS management have been studied, among these mechanisms there is an appropriate scheduler implementation for packets carried on WiMAX network which can increase QoS achievement possibility.WiMAX module used in our simulation deploys scheduling algorithms (FIFO, FQ, DRR, and WFQ) to deal with packets transmission. This paper is aimed at evaluating these algorithms in relation with WiMAX network performance. Performance metrics reported in this work are packet loss, throughput, and average delay. This paper tries to design an architecture which is able to convey the data belonging to various classes of traffic that guarantee their respective needs. Simulation results can show the performance of scheduling schemes used in this architecture.

Performance Analysis for the QoS Support in LTE and WiFi

IEEE, 2016

In recent decades, staggering number of mobile applications have been developed in the wireless technology arena. The Wireless Fidelity (WiFi) and the Long Term Evolution (LTE) have become the most common wireless technologies used for those applications. Mobile applications are classified into Real-Time (RT) and Non Real-Time (NRT). The growth in the number of users burdens the network with more congestion which requires techniques to carry different types of traffic simultaneously in order to alleviate the problem. Different types of traffic (RT or NRT) are managed by Quality of Service (QoS) provisioning techniques. The main issue with the dominant services (RT applications) is the fact that they are delay sensitive, and this is the motivation for building a scheme that enables both LTE and WiFi systems to achieve reasonable values for delay, jitter, and packet loss. In this paper, we propose a QoS provisioning method that could be adopted by both LTE and WiFi, separating the traffic into RT and NRT applications. In the first stage, Class-Based Weighted Fair Queuing (CBWFQ) and Round Robin (RR) disciplines are used for RT and NRT applications respectively. In the second step, Deficit Weighted Round Robin Queuing (DWRRQ) is used for all applications. In this paper, we have analyzed the results of implementation of the proposed scheme in LTE and WiFi networks, and have made a comparison between their results (jitter, end-to-end delay, and traffic received). Simulation results demonstrate improvement in delay for RT in both networks.