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In this paper, the performance of quality of services for an IEEE 802.16 based WiMAX access network is analyzed. WiMAX is an emerging broadband wireless communication standard used as a mode of transmission and high speed internet access. WiMAX is a technology which provides more bandwidth, better QoS, better security, greater coverage and has low infrastructure cost. The quality of service related...
IEEE 802.16 well known as WIMAX is defined as the standard of Broadband WMAN networks. This technology is able to mix real time and non real time services with the definition of service classes. To efficientlty schedule traffics of different classes, we proposed in a previous work a token bucket based scheme and evaluated its performances by means of probabilistic models. In this paper, we explore...
WiMAX, the acronym for Worldwide Interoperability for Microwave Access is a set of technical standards based on IEEE 802.16 standard. It provides an internet connection to broadband coverage area of several kilometers in radius, 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...
WiMAX refers to Wireless Interoperable implementations of the IEEE 802.16 standards ratified by the WiMAX Forum has a main goal to deliver wireless communications with quality of service in a secured environment. The WiMAX MAC layer is designed to support different types of applications and services having different Quality of service (QoS) requirements. In addition of providing higher throughput...
Motivated by the increasing demand for multimedia services in the internet broadband networks, WiMAX (Worldwide Interoperability for Microwave Access) technology has emerged as a competitive alternative to wired networks broadband. WiMAX is used today as a method of transmission and high-speed internet access, covering a wide geographical area. Unlike DSL (Digital Subscriber Line) or other wired technology...
Wimax is an broadband wireless technology based on IEEE 802.16. It is very helpful and cheaper than other possible solutions. It is purely based on the 4G technology for the upcoming generation. In wireless technology the major problem is speed, Quality of Service, data rates in order to overcome that they going for some valuable technology. In this paper we consider WIMAX and WLAN for controlling...
In WiMAX architecture to avoid congestion at the base station, a mechanism namely WiMAX Fair Intelligent Congestion Control (WFICC) was proposed in [11]. WFICC ensures that the traffic is scheduled in such a way that the base station output buffer operates around a target operating point, without violating the Quality of Service (QoS) requirements of connections. However, only preliminary results...
SCIS is the State Company for Internet Services in Iraq that works as the main Internet Service Provider (ISP). After 2003 war in Iraq, there is extremely high demand for Internet service due to very long period of sanctions enforced on Iraq. However, satisfying such high demand is a challenging task; as the cost, number of subscribers and Quality of Service (QoS) are important factors that need to...
Regarding the necessity of internet and also increasing demand for various services, WiMAX network with high bandwidth and suitable speed of transfer can be considered as a solution for public access. This technology with production in considerable volumes from fixed to portable versions shows notable progress in wireless connectivity. Capability of Quality of Service (QoS) support provides user satisfaction...
Worldwide Interoperability for Microwave Access or better known as WiMAX is a technology based on IEEE 802.16 standard with guaranteed QoS which provides high speed data rates. In this paper, we analyze the performance of VoIP over the commercial WiMAX networks through traffic measurements. The measurements focused on two QoS elements, jitter and latency that greatly affect the quality of the network...
WiMAX (Worldwide Interoperability for Microwave Access) is emerging as one of the most promising technology for wireless communication network in metropolitan areas today. It is designed to provide different services such as voice, data and video with different type of QoS(Quality of Service). A scheduling scheme plays a very important role to achieve the QoS requirement. There are scheduling algorithms...
Nowadays, broadband access network has obtained increasing attention among Internet users. High bandwidth demands and the need on mobility of the network are factors for the network design and architectures to be part of the hot topics in the research area. Wireline optical and wireless networks are two different architectures of broadband access network which offer advantages over each other. Quality...
Next Generation Wireless Networks (NGWNs) focus on convergence of different Radio Access Technologies (RATs) providing good Quality of Service (QoS) for applications such as Voice over IP traffic (VoIP) and video streaming. The voice applications over IP networks are growing rapidly due to their increasing popularity and cost. To meet the demand of providing high-quality of VoIP at anytime and from...
As DCF (Distributed Coordination Function) in IEEE 802.11 standard adopts distributed contention with random back off time, it results in uncertainty and packet delay and jitter. It is not suitable for real-time data transmission and cannot meets the needs to access media resources at fixed time interval for some application, such as VoIP. This paper proposes a TDMA-like distributed multiple access...
Designing a heterogeneous network including systems providing different QoS, such as the emerging WiMAX, is a difficult task. The integration of a WiMAX access system with Differentiated Services (DiffServ) enhances the overall performance of the network. This paper investigates the interworking between WiMAX and DiffServ networks, by measuring one-way delay, jitter and packet drop rate of VoIP traffic...
This paper proposes a new scheduling algorithm for IEEE 802.16-2005 Broadband Wireless Metropolitan Area Networks in TDD mode. The proposed algorithm focuses on solving the problem of handling high priority traffic in congested networks while minimizing starvation conditions for other served classes. In this work, a detailed simulation study is carried out for the proposed scheduling algorithm as...
Wireless data services, boosted by the massive use of popular Internet-based services such as email, WWW, etc., wireless wideband networks capable of supporting mobile multimedia services have attracted increasing intention in last few years. An important requirement has been postulated for these wideband services — they cannot be substantially more expensive than the voice services offered today...
This paper proposes a new scheduling algorithm for IEEE 802.16-2005 Broadband Wireless Metropolitan Area Networks in TDD mode. The proposed algorithm focuses on solving the problem of handling high priority traffic in congested networks while minimizing starvation conditions for other served classes. In this work, a detailed simulation study is carried out for the proposed scheduling algorithm as...
This paper presents the key design factors that must be taken into account when developing resource allocation algorithms. IEEE 802.16e standard does not include a scheduling algorithm for the uplink direction and it remains open for research and continuous improvement. Using OPNET, we investigate different factors that impact the UL resource allocation in WIMAX. Based on one of our previous papers...
The handoff, that is when the user move, quickly, and from within the large scope of the WIMAX into smaller and shorter range of ZIGBEE range of services, then leave the ZIGBEE range of services to another Wimax range of services. At this time the vertical short period of time will cause a number of frequently handoff times, resulting in decreased system efficiency, service quality also followed in...
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