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For the reliable control of Micro Unmanned Aerial Vehicles (MUAV) using IP based networks it is of high importance to assure certain quality of service warranties for the transmission of control information. The mobile WiMAX standard IEEE 802.16e defines five QoS Classes which represent different requirements concerning data rate and delay. The scheduling scheme which is used to fulfill these requirements...
Packet scheduling is key to QoS capabilities of broadband wired and wireless networks. In a heterogeneous traffic environment, a comprehensive QoS packet scheduler must strike a balance between flow fairness and access delay. Many advanced packet scheduling solutions have targeted fair bandwidth allocation while protecting delay-constrained traffic by adding priority queue(s) on top of a fair bandwidth...
The new DVB-S2 standard, introduced by ETSI, is mainly based on three key concepts: best transmission performance, total flexibility and reasonable receiver complexity. The Adaptive Coding and Modulation (ACM) scheme is the tecnique allowing to achieve these main goals. In particular, this tecnique allows to adapt the modulation and code levels, performed at the physical layer, at channel variations...
Grid computing comprises of distributed computer systems which are geographically dispersed to share the combination of resources in a heterogeneous environment. Grid computing is one of the latest technologies to solve very complex problems in scientific applications, using the resource sharing concept in the dynamic virtual organizations. The main problem occurs in most of the organization is that...
Interest in Broadband Wireless Access (BWA) has been growing due to its high speed data rate, wide area coverage and support for Quality of Service (QoS) requirement for different applications. There is a need for better scheduler to handle diversified QoS while increasing system efficiency. In this paper, we propose an Improvised-Modified Deficit Round Robin (I-MDRR) that not only meets the QoS requirements...
LTE system performance largely depends on the high efficiency of frequency domain resource scheduling. This paper presents a single-cell LTE Downlink scheduling model, and then introduces the economic concept of utility function in order to design a LTE system scheduling algorithm based on the utility function (UBS) and we simulate the algorithm. We simulate and compare throughput, fairness, packet...
Qos provision is considered as the complex task due to the heterogeneous nature, diverse QoS requirements of emergent different applications. With the advent of high bandwidth 3G/4G technologies, like LTE, LTE-advanced, the necessity of QoS provision becomes even crucial. Uplink scheduling with QoS provision is considered here. The contribution of this work is uplink packet scheduling scheme maintaining...
IEEE 802.16 based Worldwide Interoperability for Microwave Access networks (WiMAX) are increasingly being deployed for last hop broadband wireless access. In order to provide the high speed access to information resources broadband technology like WiMAX is needed. In this paper we compared different uplink scheduling algorithms of WiMAX mainly maximum carrier to interference and noise (Max C/I) algorithm...
Concerning the low scheduling ratio caused by complicated QoS process and precise match in learning resource scheduling of campus grid, the authors classified and defined QoS parameters. Finally simulations were performed to compare the performance of the maximum matching scheduling algorithm with that of the multiple QoS-based resource scheduling algorithm. The paper improve a mode of learning resource...
In this paper, we propose a QoS uplink scheduling algorithm for LTE collaborating with delay estimation. Unlike downlink scheduling, uplink scheduling cannot incorporate packet delay information due to specification constraints of LTE. The limited information results in difficulty ensuring a QoS when conventional scheduling algorithms are employed. Using a delay estimation tailored to LTE, we have...
With the growing need of high rate data services, 3GPP standard has investigated ways to support multimedia services with multi-carrier transmissions. Supporting high data rate guaranteeing the quality of service (QoS) and fairness of users is an important issue and should be addressed in an advanced wireless system. This paper investigates packet scheduling considering QoS of real-time traffic and...
In the Long Term Evolution system Discontinuous Transmission and Reception (DRX/DTX) has been introduced to extend the terminal battery lifetime. In this paper, we study the energy-saving provided by this mechanism and the impact on the QoS performance of Voice over IP (VoIP) traffic under dynamic and semi persistent packet scheduling strategies. Simulations and analytical results show that the DRX/DTX...
In today's wireless communication systems, the design of efficient packet scheduling algorithms at the MAC layer is proven to have significant impact on their overall performances. In the light of this fact, we propose and compare in this paper different scheduling techniques which aim at satisfying the users' requirements in terms of both rates and delays. The considered system is a downlink multi...
With mobile terminals becoming the primary Internet devices for most of the people in the world and smartphone users generating on average 10 times more traffic than other users, it is critical that operators adopt smarter segmentation and pricing strategies. This paper analyzes how the deployment of QoS, with traffic segmentation by users and by services, may help service providers to achieve these...
It is desirable that energy performance improvement is not realized at the expense of other network performance parameters. This paper investigates the trade off between energy efficiency, spectral efficiency and user QoS performance for a multi-cell multi-user radio access network. Specifically, the energy consumption ratio (ECR) and the spectral efficiency of several common frequency domain packet...
Packet scheduling in wireless network is one of the issues that requires attention to quality of service provision (QoS). In heterogeneous wireless network, whereby many packets of different QoS are involved, packet scheduling becomes more difficult. This paper presents packet scheduling algorithm that uses earliest deadline first for scheduling constant bit rate packets. We estimate the wireless...
The IEEE 802.16 standard defines wireless broadband access technology called Worldwide Interoperability for Microwave Access (commonly called fixed WiMAX). WiMAX introduces several interesting advantages including variable and high data rate, last mile wireless access, point to multipoint communication, large frequency range, and Quality of Service (QoS) for various types of applications. IEEE 802...
The last decade has shown a rapid growth in wireless communication technologies. Wireless Mesh Networks (WMNs) appear to be a promising evolution of traditional wireless communications. WMNs are involved to support a variety of services and traffic types. Real time applications like Voice over Internet Protocol (VoIP) require a strict Quality of Services (QoS) such as low end-to-end delay, low drop...
WiMAX is one of the most familiar broadband wireless access technologies that support multimedia transmission. IEEE802.16 Medium Access Control (MAC) covers a large area for bandwidth allocation and QoS mechanisms for various types of applications. Nevertheless, the standard lacks a MAC scheduling algorithm that has a multi-dimensional objective of satisfying QoS requirements of the users, maximizing...
Offering throughput guarantees for cellular wireless networks, carrying real-time traffic, is of interest to both the network operators and the customers. Furthermore, to be able to quantify the soft throughput guarantees for a certain scheduling algorithm without conducting experimental investigations, is valuable for network providers. In this paper, we develop an expression for the approximate...
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