Quality of Service (QoS) in WiMAX (original) (raw)

Qos Support in Wimax Networks: Issues and Experimental Measurements

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.

Resource Allocation in IEEE 802.16 Mobile WiMAX

2010

In this chapter, we focus on the management of resource allocation and scheduling in IEEE 802.16 e based mobile WiMAX networks. Since mobile WiMAX uses orthogonal frequency division multiple access (OFDMA), the scheduling issues can apply for other OFDMA-based networks as well. Unlike wireless LANs, WiMAX networks incorporate several Quality of Service (QoS) mechanisms at the media access control (MAC) layer for guaranteed services for data, voice, and video.

A survey of MAC based QoS implementations for WiMAX networks

Computer Networks, 2009

We present a comprehensive survey of proposed Quality of Service (QoS) mechanisms in the Media Access Control (MAC) sublayer of WiMAX based wireless networks. QoS support in WiMAX is a fundamental design requirement, and is considerably more difficult than in wired networks, mainly because of the variable and unpredictable characteristics of wireless links.

Quality-of-Service Scheduling for WiMAX Networks

2007

Experimental evaluation of multimedia services in WiMAX

Proceedings of the Fourth …, 2008

WiMAX is a new technology that can provide long distance broadband wireless access based on IEEE 802.16 standards. After a short overview of IEEE 802.16 and the WiMAX network architecture, we center on the Quality of Service (QoS) support for multimedia applications in WiMAX. Inherent QoS support is an important factor differentiating WiMAX from other wireless access technologies, but so far has not been studied using off-the-shelf equipment. We fill this gap by empirically quantifying the performance of different multimedia applications and scheduling services in a WiMAX testbed. Specifically, the performance attained by multimedia applications over fixed WiMAX links, configured with Best Effort and Real Time Polling scheduling service classes is presented. We measure performance under both over-provisioned and under-provisioned configurations. When resources are substantially over-provisioned, the WiMAX equipment performs well and application requirements are fulfilled as expected. On the other hand, in under-provisioned conditions, applications using the Real Time Polling scheduling service enjoy better performance than those using the Best Effort scheduling service, but we note that proper configuration of the service flows may not be straightforward in practice.

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.

IJERT-Qos Analysis Of Wimax Network 802.16

International Journal of Engineering Research and Technology (IJERT), 2012

https://www.ijert.org/qos-analysis-of-wimax-network-802.16 https://www.ijert.org/research/qos-analysis-of-wimax-network-802.16-IJERTV1IS8493.pdf WiMAX is one of the important broadband wireless technologies .Being an emerging technology, WiMAX supports multimedia applications such as voice over IP (VoIP), voice conference and online gaming. It is necessary to provide Quality of Service (QoS) guaranteed with different characteristics, quite challenging, however, for Broadband Wireless Access (BWA) networks.. Many traffic scheduling algorithms are available for wireless networks, e.g. Round Robin, scheme. WiMax (IEEE 802.16) is one such standard specifies general QoS .In this paper, we analysed and simulated the different scheduling algorithms for WiMAX.

Scheduling in IEEE 802.16 e mobile WiMAX networks: key issues and a survey

Selected Areas in …, 2009

Interest in broadband wireless access (BWA) has been growing due to increased user mobility and the need for data access at all times. IEEE 802.16e based WiMAX networks promise the best available quality of experience for mobile data service users. Unlike wireless LANs, WiMAX networks incorporate several quality of service (QoS) mechanisms at the Media Access Control (MAC) level for guaranteed services for data, voice and video. The problem of assuring QoS is basically that of how to allocate available resources among users in order to meet the QoS criteria such as delay, delay jitter and throughput requirements. IEEE standard does not include a standard scheduling mechanism and leaves it for implementer differentiation. Scheduling is, therefore, of special interest to all WiMAX equipment makers and service providers. This paper discusses the key issues and design factors to be considered for scheduler designers. In addition, we present an extensive survey of recent scheduling research. We classify the proposed mechanisms based on the use of channel conditions. The goals of scheduling are to achieve the optimal usage of resources, to assure the QoS guarantees, to maximize goodput and to minimize power consumption while ensuring feasible algorithm complexity and system scalability.

Bandwidth Allocation Scheduling Algorithms for IEEE 802.16 WiMax Protocol to Improve QoS: A Survey

In recent times, wireless network is extensively accessed technology to connect remote user terminal with its primary network. QoS is the vital parameter that can be treated wisely when data is transferred between terminal users and network administrators. In WiMax, QoS is determined accurately at MAC layer but bandwidth allocation scheduling algorithm which defines QoS is not clearly defined in IEEE 802.16 network architecture. This paper evaluates and compare various existing algorithms and enlighten different issues in designing of these algorithms, furthermore a new bandwidth allocation scheduling algorithm is proposed for IEEE 802.16 WiMax protocol in order to improve Quality of Service (QoS).

Quality of Service (QoS) in WiMAX (original) (raw)

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