Academic literature on the topic 'QoS in WiMAX'
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'QoS in WiMAX.'
Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.
You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.
Journal articles on the topic "QoS in WiMAX"
1
Alavi, M.M.Ahamed, W.P.U Fernando, P.A.Y.P Permuna, et al. "Enhanced QoS support in OFDMA-Based WiMAX Systems." COMPUSOFT: An International Journal of Advanced Computer Technology 05, no. 04 (2016): 2090–95. https://doi.org/10.5281/zenodo.14791600.
Full textAbstract:
Worldwide Interoperability of Microwave Access (WiMAX) network offer promising opportunities for unwiring the last mile connectivity to the internet with its comprehensive support of Quality of Service(QoS). Everything has a disadvantage or a problem to be fixed, WiMAX also has a problem that is to provide QoS when providing data, audio and video services. Actually it"s not a problem though as it supports orthogonal frequency division multiple access (OFDMA) technology. However the combination of several technologies like OFDM, OFDMA assures the QoS of WiMAX. One of the main features in a WiMAX MAC layer is that it can provide differentiated services among different traffic categories with individual QoS requirements. In this research paper the research team first give an overview of the key aspects of WiMAX and describe Multimedia broadcast multicast service (MBMS) architecture and then propose a broadcast architecture for WiMAX that is based on MBMS to increase the QoS of Multimedia Streaming in WiMAX.
2
Bohnert, Thomas Michael, Marco Castrucci, Nicola Ciulli, et al. "QoS Management and Control for an All-IP WiMAX Network Architecture: Design, Implementation and Evaluation." Mobile Information Systems 4, no. 4 (2008): 253–71. http://dx.doi.org/10.1155/2008/407565.
Full textAbstract:
The IEEE 802.16 standard provides a specification for a fixed and mobile broadband wireless access system, offering high data rate transmission of multimedia services with different Quality-of-Service (QoS) requirements through the air interface. The WiMAX Forum, going beyond the air interface, defined an end-to-end WiMAX network architecture, based on an all-IP platform in order to complete the standards required for a commercial rollout of WiMAX as broadband wireless access solution. As the WiMAX network architecture is only a functional specification, this paper focuses on an innovative solution for an end-to-end WiMAX network architecture offering in compliance with the WiMAX Forum specification. To our best knowledge, this is the first WiMAX architecture built by a research consortium globally and was performed within the framework of the European IST project WEIRD (WiMAX Extension to Isolated Research Data networks). One of the principal features of our architecture is support for end-to-end QoS achieved by the integration of resource control in the WiMAX wireless link and the resource management in the wired domains in the network core. In this paper we present the architectural design of these QoS features in the overall WiMAX all-IP framework and their functional as well as performance evaluation. The presented results can safely be considered as unique and timely for any WiMAX system integrator.
3
Pranindito, Dadiek, Rendy Munadi, and R. Rumani Rumani. "Analisis Perbandingan Performansi Penjadwalan Paket Antara Homogeneous Algorithm Dengan Hybrid Algorithm Pada Jaringan Point-To-Multipoint Wimax." JURNAL INFOTEL - Informatika Telekomunikasi Elektronika 6, no. 2 (2014): 63. http://dx.doi.org/10.20895/infotel.v6i2.18.
Full textAbstract:
Saat ini, dalam dunia telekomunikasi, (Worldwide Interoperability for Microwave Access) WiMaX merupakan teknologi nirkabel yang menyediakan hubungan jalur lebar dalam jarak jauh, memiliki kecepatan akses yang tinggi dan jangkauan yang luas serta menyediakan berbagai macam jenis layanan. Masalah yang menarik dan menantang pada WiMaX adalah dalam hal menyediakan jaminan kualitas pelayanan (QoS) untuk jenis layanan yang berbeda dengan bermacam-macam kebutuhan QoS-nya. Untuk memenuhi kebutuhan QoS tersebut, maka diperlukan suatu algoritma penjadwalan. Dalam penelitian ini dilakukan simulasi jaringan WiMaX menerapkan algoritma penjadwalan dengan metode homogeneous algorithm dan hybrid algorithm. Perwakilan pada metode homogeneous algorithm akan menggunakan algoritma penjadwalan Weighted Fair Queuing (WFQ) dan Deficit Round Robin (DRR), sedangkan pada metode hybrid algorithm menggunakan penggabungan antara algoritma penjadwalan DRR dan WFQ. Pengujian kinerja algoritma penjadwalan tersebut dilakukan dengan membandingkan kedalam 5 jenis kelas QoS pada WiMAX yaitu UGS, rtPS, nrtPS, ertPS, dan Best Effort. Dari hasil pengujian, hybrid algorithm memberikan nilai QoS yang lebih baik jika dibandingkan dengan homogeneous algorithm. hybrid algorithm sangat cocok jika diterapkan pada kondisi jaringan yang memiliki trafik dengan paket data yang bervariasi, karena dapat menghasilkan throughput yang tinggi, serta dapat menghasilkan nilai delay dan jitter yang rendah
4
Shyh-Fang, Huang. "Video Classification and Adaptive QoP/QoS Control for Multiresolution Video Applications on IPTV." International Journal of Digital Multimedia Broadcasting 2012 (2012): 1–7. http://dx.doi.org/10.1155/2012/801641.
Full textAbstract:
With the development of heterogeneous networks and video coding standards, multiresolution video applications over networks become important. It is critical to ensure the service quality of the network for time-sensitive video services. Worldwide Interoperability for Microwave Access (WIMAX) is a good candidate for delivering video signals because through WIMAX the delivery quality based on the quality-of-service (QoS) setting can be guaranteed. The selection of suitable QoS parameters is, however, not trivial for service users. Instead, what a video service user really concerns with is the video quality of presentation (QoP) which includes the video resolution, the fidelity, and the frame rate. In this paper, we present a quality control mechanism in multiresolution video coding structures over WIMAX networks and also investigate the relationship between QoP and QoS in end-to-end connections. Consequently, the video presentation quality can be simply mapped to the network requirements by a mapping table, and then the end-to-end QoS is achieved. We performed experiments with multiresolution MPEG coding over WIMAX networks. In addition to the QoP parameters, the video characteristics, such as, the picture activity and the video mobility, also affect the QoS significantly.
5
Huchappa, Ravishankar, and Kiran Kumari Patil. "Evolutionary model to guarantee quality of service for tactical worldwide interoperability for microwave access networks." IAES International Journal of Artificial Intelligence (IJ-AI) 11, no. 2 (2022): 687. http://dx.doi.org/10.11591/ijai.v11.i2.pp687-698.
Full textAbstract:
The smart phone industries evolution had made the growth in wireless communication. The increase in social media usage led to huge increase of network traffic as sharing of data for multimedia like video conferencing, and voice over internet protocol (VoIP). Majority of services like this requires network resources and real-time strict quality of service (QoS). However high cost of network deployment is included. All the major service providers are currently being adopted to the WiMAX 802.16 network. Therefore, the worldwide interoperability for microwave access (WiMAX) network must have different supply policies and QoS for various applications. The implementation of these QoS policies was not provided by WiMAX for various needs of application. Recently development of various scheduling mechanism for QoS provisioning has been made. However, users improper synchronization made these models inefficient. To address this, uplink scheduling with feedback is considered to provision QoS. However, it induces delay in accessing slots, as result the bandwidth is wasted. To utilize bandwidth efficiently evolutionary computing is adopted by various existing model. However, these models induce computation overhead and may not be suitable for provisioning real-time services. The evolutionary computing model is used to compute ideal threshold.
6
Ravishankar, Huchappa, and Kumari Patil Kiran. "Evolutionary model to guarantee quality of service for tactical worldwide interoperability for microwave access networks." International Journal of Artificial Intelligence (IJ-AI) 11, no. 2 (2022): 687–98. https://doi.org/10.11591/ijai.v11.i2.pp687-698.
Full textAbstract:
The smart phone industries evolution had made the growth in wireless communication. The increase in social media usage led to huge increase of network traffic as sharing of data for multimedia like video conferencing, and voice over internet protocol (VoIP). Majority of services like this requires network resources and real-time strict quality of service (QoS). However high cost of network deployment is included. All the major service providers are currently being adopted to the WiMAX 802.16 network. Therefore, the worldwide interoperability for microwave access (WiMAX) network must have different supply policies and QoS for various applications. The implementation of these QoS policies was not provided by WiMAX for various needs of application. Recently development of various scheduling mechanism for QoS provisioning has been made. However, users improper synchronization made these models inefficient. To address this, uplink scheduling with feedback is considered to provision QoS. However, it induces delay in accessing slots, as result the bandwidth is wasted. To utilize bandwidth efficiently evolutionary computing is adopted by various existing model. However, these models induce computation overhead and may not be suitable for provisioning real-time services. The evolutionary computing model is used to compute ideal threshold.
7
Dr.B.Sridevi, Priya R.Anantha, and V.S.Primiya. "PROPOSED WFQ BASED DYNAMIC BANDWIDTH ALLOCATION FOR MOBILE WIMAX APPLICATION." International Journal of Computational Science and Information Technology (IJCSITY) 2, May (2014): 1–11. https://doi.org/10.5281/zenodo.3548117.
Full textAbstract:
<strong>ABSTRACT </strong> In this project, we proposed a framework to support heterogenous traffic with different QoS demand in WiMAX. This framework dynamically changes the bandwidth allocation (BA) for ongoing and new arrival connections based on network condition and service demand. The objective is to efficiently use the available bandwidth and provide QoS support in a fair manner. Dynamic allocation of spectrum prior to transmission can mitigate the starvation problem of Non Real time application. The WFQ based dynamic bandwidth allocation framework uses architecture that has packet scheduler scheme (PS), call admission policy and a dynamic bandwidth allocation mechanism. By the simulation result we have showed that this architecture could provide QoS support by being fair to all classes of services. <strong>KEYWORDS </strong> QoS in WiMAX, Dynamic Bandwidth Allocation, WFQ.
8
Sangeetha, J., Keerthiraj Nagaraj, K. N. Balasubramanya Murthy, and Ram P. Rustagi. "A New Approach for Analyzing the Performance of the WiMAX Networks based on QoS Traffic Prediction Routing Protocol using Gene Expression Programming." International Journal of Applied Metaheuristic Computing 7, no. 2 (2016): 16–38. http://dx.doi.org/10.4018/ijamc.2016040102.
Full textAbstract:
WiMAX is one of the broadband wireless access technologies, which provides the efficient QoS to the large number of users. The multimedia applications such as real time and non-real time services are gaining importance in the WiMAX network. To support such applications, there is a need to propose an efficient QoS traffic prediction routing protocol for the WiMAX networks. To address this, the authors are using Gene Expression Programming technique. They have generated datasets for CBR based traffic and file transfer applications. Here, they focus to develop the mathematical expressions for throughput of the network in terms of bandwidth, average end-to-end delay and average jitter for CBR based traffic and file transfer applications, so that they can analyze and predict the QoS traffic of the network. The simulation results show that the model values and the target values match with better approximation. Further, sensitivity analysis has been carried out for both CBR based traffic and file transfer applications.
9
Liu, Qiang, Min Chen, Jie Zhang, Bingwen Shen, and Zhong Chu. "Network Planning for WiMAX-R Networks." JUCS - Journal of Universal Computer Science 18, no. (9) (2012): 1194–217. https://doi.org/10.3217/jucs-018-09-1194.
Full textAbstract:
In this paper, a novel network planning process of the Mobile WiMAX for Railway (WiMAX-R) network is proposed. We first analyze the factors need considered in network planning. After introducing the WiMAX-R network architecture, the WiMAX-R network planning process is presented in detail. The process comprises application analysis, capacity prediction, network parameters configuring, coverage planning, handover planning and network simulation validation. In each step, Mobile WiMAX technical features and railway environment characters are both take into consideration. Finally, we simulated a WiMAX-R planning example based on OPNET platform. The simulation results showed that the designed WiMAX-R network can perfectly satisfy the applications' QoS requirements.
10
Hamza, Ekhlas Kadhum, and Shahad Nafea. "Design and Analysis WIMAX Network Based on Coverage Planning." Journal of Engineering 26, no. 2 (2020): 99–110. http://dx.doi.org/10.31026/j.eng.2020.02.08.
Full textAbstract:
In this paper, wireless network is planned; the network is predicated on the IEEE 802.16e standardization by WIMAX. The targets of this paper are coverage maximizing, service and low operational fees. WIMAX is planning through three approaches. In approach one; the WIMAX network coverage is major for extension of cell coverage, the best sites (with Band Width (BW) of 5MHz, 20MHZ per sector and four sectors per each cell). In approach two, Interference analysis in CNIR mode. In approach three of the planning, Quality of Services (QoS) is tested and evaluated. ATDI ICS software (Interference Cancellation System) using to perform styling. it shows results in planning area covered 90.49% of the Baghdad City and used 1000 mobile subscribers and percentage connect with base station 84.3% on the establish QoS requirements .
 
Dissertations / Theses on the topic "QoS in WiMAX"
1
Perera, Bandaralokuge Earl Shehan. "VoIP and best effort service enhancement on fixed WiMAX." Thesis, University of Canterbury. Electrical & Computer Engineering, 2008. http://hdl.handle.net/10092/1575.
Full textAbstract:
Fixed Broadband Wireless Access (BWA) for the last mile is a promising technology
which can offer high speed voice, video and data service and fill the technology gap
between Wireless LANs and wide area networks. This is seen as a challenging
competitor to conventional wired last mile access systems like DSL and cable, even in
areas where those technologies are already available. More importantly the
technology can provide a cost-effective broadband access solution in rural areas
beyond the reach of DSL or cable and in developing countries with little or no wired
last mile infrastructure. Earlier BWA systems were based on proprietary technologies
which made them costly and impossible to interoperate. The IEEE 802.16 set of
standards was developed to level the playing field. An industry group the WiMAX
Forum, was established to promote interoperability and compliance to this standard.
This thesis gives an overview of the IEEE 802.16 WirelessMAN OFDM standard
which is the basis for Fixed WiMAX. An in depth description of the medium access
control (MAC) layer is provided and functionality of its components explained.
We have concentrated our effort on enhancing the performance of Fixed
WiMAX for VoIP services, and best effort traffic which includes e-mail, web
browsing, peer-to-peer traffic etc. The MAC layer defines four native service classes
for differentiated QoS levels from the onset. The unsolicited grant service (UGS)
class is designed to support real-time data streams consisting of fixed-size data
packets issued at periodic intervals, such as T1/E1 and Voice over IP without silence
suppression, while the non-real-time polling service (nrtPS) and best effort (BE) are
meant for lower priority traffic. QoS and efficiency are at opposite ends of the scale in
most cases, which makes it important to identify the trade-off between these two
performance measures of a system. We have analyzed the effect the packetization
interval of a UGS based VoIP stream has on system performance. The UGS service
class has been modified so that the optimal packetization interval for VoIP can be
dynamically selected based on PHY OFDM characteristics. This involves cross layer
communication between the PHY, MAC and the Application Layer and selection of
packetization intervals which keep the flow within packet loss and latency bounds
while increasing efficiency. A low latency retransmission scheme and a new ARQ
feedback scheme for UGS have also been introduced. The goal being to guarantee
QoS while increasing system efficiency. BE traffic when serviced by contention based
access is variable in speed and latency, and low in efficiency. A detailed analysis of
the contention based access scheme is done using Markov chains. This leads to
optimization of system parameters to increase utilization and reduce overheads, while
taking into account TCP as the most common transport layer protocol. nrtPS is
considered as a replacement for contention based access. Several enhancements have
been proposed to increase efficiency and facilitate better connection management.
The effects of proposed changes are validated using analytical models in Matlab and
verified using simulations. A simulation model was specifically created for IEEE
802.16 WirelessMAN OFDM in the QualNet simulation package. In essence the aim
of this work was, to develop means to support a maximum number of users, with the
required level of service, using the limited wireless resource.
2
Reis, André Braga. "QoS-based audio and video packet scheduling over WiMAX Mesh networks." Master's thesis, Universidade de Aveiro, 2009. http://hdl.handle.net/10773/7475.
Full textAbstract:
Mestrado em Engenharia Electrónica e Telecomunicações<br>´E evidente na actualidade que os utilizadores procuram cada vez mais aceder
a servi¸cos multim´edia e aplica¸c˜oes interactivas nos seus terminais m´oveis.
H´a, portanto, uma necessidade de implementar arquitecturas de Qualidadede-
Servi¸co (QoS) e Qualidade-de-Experiˆencia (QoE) robustas, que sejam
capazes de fornecer um atraso baixo para as aplica¸c˜oes interactivas, ao
mesmo tempo que lidam com outro tipo de aplica¸c˜oes que requerem uma
maior largura de banda, mas com mais tolerˆancia a atrasos, desta forma
maximizando a utiliza¸c˜ao dos recursos dispon´ıveis na rede e melhorando a
experiˆencia do utilizador final.
A norma IEEE 802.16 representa uma das tecnologias mais avan¸cadas e de
maior relevˆancia para o acesso sem fios em banda larga a redes de ´area
metropolitana. O modo de opera¸c˜ao Ponto-multiponto (PMP) do IEEE
802.16 foi desenvolvido para suportar requisitos de QoS, control´avel pelo
operador da rede, e desta forma complementando as solu¸c˜oes m´oveis de
terceira-gera¸c˜ao j´a existentes. Um modo alternativo de opera¸c˜ao em malha
(MESH) permite a cria¸c˜ao de redes flex´ıveis e auto-configur´aveis em que o
tr´afego ´e encaminhado atrav´es de v´arios n´os.
Esta tese aborda os temas de QoS e QoE quando aplicados a redes sem
fios em malha, operando sobre a norma IEEE 802.16. S˜ao contribu´ıdos
melhoramentos e an´alises de desempenho a uma nova arquitectura para
trazer suporte de QoS ao modo de opera¸c˜ao MESH do standard 802.16.
Tamb´em ´e apresentado um novo escalonador de pacotes com o objectivo de
melhorar a qualidade subjectiva de servi¸cos de ´audio, v´ıdeo e transferˆencia
de ficheiros que o utilizador final experiencia.
Os resultados provenientes de simula¸c˜oes demonstram tanto a eficiˆencia da
arquitectura QoS em termos de medidas objectivas como taxa de transfer
ˆencia e atraso de pacotes, como o bom funcionamento do escalonador
de pacotes para QoE, com melhorias vis´ıveis em m´etricas de qualidade subjectiva.<br>It is clear nowadays that users are becoming increasingly interested in accessing
multimedia and interactive applications on their mobile terminals.
Therefore, there is a need to implement robust Quality-of-Service (QoS) and
Quality-of-Experience (QoE) architectures capable of providing low delay
for such interactive applications, while at the same time dealing with other
bandwidth-hungry but more delay-tolerant services, and thereby maximizing
the network’s available resources and improving the end-user experience.
The IEEE 802.16 standard represents one of the most relevant and advanced
technologies for broadband wireless access in metropolitan area networks.
The point-to-multipoint (PMP) mode of IEEE 802.16 has been designed to
support quality of service (QoS) requirements, controlled by the network operator,
thus complementing the existing third-generation mobile solutions.
An alternative mesh (MESH) mode of operation allows the creation of flexible,
self-configuring networks with traffic routing through various nodes.
This thesis approaches the subjects of QoS and QoE when applied to wireless
mesh networks operating under the IEEE 802.16 standard. It provides
improvements and performance evaluations of a new architecture to bring
QoS support to the 802.16 MESH mode of operation. It also presents a new
packet scheduler with the aim to improve the subjective quality of audio,
video and file transfer services, as experienced by the end user.
Simulation results demonstrate both the efficiency of the QoS architecture in
terms of objective measurements such as throughput and packet delay, and
the good functioning of the QoE-aware packet scheduler, with noticeable
increases in subjective quality metrics.
3
Bchini, Tarek. "Gestion de la Mobilité, de la Qualité de Service et Interconnexion de Réseaux Mobiles de Nouvelle Génération." Thesis, Toulouse, INPT, 2010. http://www.theses.fr/2010INPT0016/document.
Full textAbstract:
Avec l’évolution rapide des technologies réseaux et télécoms radios mobiles, les chercheurs sont actuellement en train de préparer l’arrivée d’une nouvelle génération baptisée 4G. Le réseau de 4ème génération qui est encore l’objet de travaux de recherche vise à améliorer l’efficacité spectrale et à augmenter la capacité de gestion du nombre des mobiles dans une même cellule. Il tend à offrir des débits élevés en situation de mobilité à grande ou faible vitesse. Il vise aussi à permettre et à faciliter l’interconnexion et l’interopérabilité entre différentes technologies existantes en rendant transparent à l’utilisateur le passage entre les réseaux. Enfin, il vise à éviter l’interruption des services durant le transfert intercellulaire, et à basculer l’utilisation vers le tout IP. Dans ce contexte, nous nous sommes intéressés en premier lieu aux problématiques de la QoS en situation de mobilité au sein d’une technologie candidate à la 4G (WiMAX mobile) pour du trafic temps-réel. Pour cela, nous avons comparé la performance de plusieurs protocoles de mobilité dans le contexte du Handover de niveau 2 et de niveau 3 et plus. Nous avons pour cela fait varier les modèles de mobilité, les configurations et les scénarios. Enfin, nous avons modélisé un algorithme décisionnel qui gère le Handover dans le WiMAX mobile en fonction de plusieurs paramètres d’entrées. Au travers de ces études, nous avons dégagé des protocoles de mobilité qui offrent un niveau de QoS acceptable pour un trafic temps-réel dans le cadre des scénarios envisagés. En deuxième lieu, nous nous sommes concentrés sur les problèmes d’interconnexion et d’interopérabilité entre les réseaux en tenant compte de la mobilité et du Handover vertical entre deux technologies. Pour cela, nous avons proposé de comparer des protocoles de mobilité puis de les combiner afin de diminuer les délais des trafics temps-réel au cours du Handover. Au niveau de l’interconnexion, nous avons proposé des modèles entre WiMAX mobile et de nombreux autres standards (802.11e, UMTS, DVB-S/RCS, LTE). Outre les solutions d’interconnexion, nous avons également mis en évidence la ou les combinaisons de protocoles de gestion de la mobilité qui permettent de garantir de la QoS<br>With the rapid evolution of mobile radio telecommunications and networks technologies, researchers are currently preparing the arrival of a new generation called 4G. The 4th generation network aims to improve spectral efficiency and increase capacity to manage a large number of mobiles in a cell. It tries to provide high flow rates under high or low mobility. It also aims to enable and facilitate the interconnection and the interoperability between different technologies allowing transparent transition between networks. Finally, it aims to avoid interruption of services during the handover, and to switch an all-IP system. In this context, we are concerned first with QoS and mobility issues in Mobile WiMAX for the real-time traffic. We compared the performance of several mobility protocols in the context of the level 2 and level 3+ handovers. Several mobility models, configurations and scenarios were considered. Finally, we modeled a decision algorithm that manages the handover in mobile WiMAX based on several input parameters.Through these studies, we have identified mobility protocols that provide an acceptable QoS level for real-time traffic under the proposed scenarios. Secondly, we focused on the problems of interconnection and interoperability between networks, taking into account the mobility and vertical handovers between two technologies. For this, we proposed to compare mobility protocols or combine them to reduce delays for real-time traffic during the handover. We also proposed interconnection models between mobile WiMAX and many other standards (802.11e, UMTS, DVB-S/RCS, LTE). Besides interconnection solutions, we also highlighted the combination or combinations of management mobility protocols that can guarantee QoS
4
Dosciatti, Eden Ricardo. "Uma nova arquitetura para provisão de QoS utilizando enxame de partículas em redes WiMAX fixas." Universidade Tecnológica Federal do Paraná, 2015. http://repositorio.utfpr.edu.br/jspui/handle/1/1309.
Full textAbstract:
Os avanços tecnológicos ocorridos nos últimos anos provocaram um crescimento na base de usuários que utilizam as redes de comunicação, principalmente com serviços de multimídia, como IPTV, videoconferência e VoIP. Como estes serviços requerem mais recursos e geram uma grande demanda sobre a infraestrutura da rede, cada usuário deve ter as suas aplicações tratadas de acordo com determinadas prioridades, para oferecer um nível aceitável de serviço. Partindo deste pressuposto, as redes de comunicação para acesso sem fio em banda larga, baseadas no padrão IEEE 802.16, também conhecidas como WiMAX, conseguem atender as várias demandas dos usuários finais, como a necessidade de acesso aos dados em todos os momentos e em qualquer lugar e a conectividade de banda larga eficiente, oferecendo uma excelente relação custo-benefício para o utilizador final, pois possibilitam uma elevada capacidade de transmissão de dados a um custo relativamente baixo de implantação. A provisão de qualidade de serviços é um fator de grande importância para o desempenho das redes de comunicação, para isso, os mecanismos de escalonamento, de controle de admissão de conexões e de policiamento de tráfego, devem estar presentes. Porém, o padrão IEEE 802.16 apenas especifica as políticas de como estes mecanismos devem ser implementados, mas não define como implementá-los. Esta pesquisa tem como objetivo apresentar uma nova arquitetura para o tráfego uplink, nas estações bases das redes WiMAX, com provisão de qualidade de serviços, utilizando a metaheurística de otimização por enxame de partículas para o cálculo da duração do tempo do quadro, quando houver a necessidade, possibilitando encontrar o valor ideal para esta quantidade, proporcionando uma melhor alocação de usuários na rede.<br>Technological advances in recent years have led to a growth in the user base using communication networks, especially with multimedia services such as IPTV, video conferencing and VoIP. As these services require more resources and generate a great demand on the network infrastructure, each user must have their applications dealt with in accordance with certain priorities, to provide an acceptable level of service. Under this assumption, the communication networks for wireless broadband, based on the IEEE 802.16 standard, also known as WiMAX, can meet the various demands of end users, the need for access to data at all times and in any place and the connectivity efficient broadband, offering excellent tredeoff for the end user by enabling high data transmission capacity at a relatively low cost of deployment. The provision of quality services is a very important factor for the performance of communication networks for that, the scheduling mechanisms, admission control connections and traffic policing, must be present. However, the IEEE 802.16 standard specifies only policies of how these mechanisms should be implemented, but does not define how to implement them. This research aims to present a new architecture for uplink traffic, the WiMAX network base stations, with provision of quality services through the particle swarm optimization metaheuristic to calculate the frame duration, allowing to find an ideal value, providing a better allocation of network users.
5
VALENTE, JUNIOR Warley Murici. "Arcabouço para aprovisionamento de QoS e QoE em redes sem fio heterogêneas WiMAX/Wi-Fi com garantia de equidade entre vazões." Universidade Federal do Pará, 2011. http://repositorio.ufpa.br/jspui/handle/2011/2779.
Full textAbstract:
Submitted by Samira Prince (prince@ufpa.br) on 2012-05-22T14:49:02Z
No. of bitstreams: 2
Dissertacao_ArcaboucoAprovisionamentoQos.pdf: 2402283 bytes, checksum: 538c75b15b62e851587e9c898048d628 (MD5)
license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5)<br>Approved for entry into archive by Samira Prince(prince@ufpa.br) on 2012-05-22T14:49:50Z (GMT) No. of bitstreams: 2
Dissertacao_ArcaboucoAprovisionamentoQos.pdf: 2402283 bytes, checksum: 538c75b15b62e851587e9c898048d628 (MD5)
license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5)<br>Made available in DSpace on 2012-05-22T14:49:50Z (GMT). No. of bitstreams: 2
Dissertacao_ArcaboucoAprovisionamentoQos.pdf: 2402283 bytes, checksum: 538c75b15b62e851587e9c898048d628 (MD5)
license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5)
Previous issue date: 2011<br>Recentemente a sociedade está vivendo em meio a um aglomerado de dispositivos móveis com múltiplas interfaces sem fio que permitem que clientes móveis domésticos e corporativos solucionem problemas rotineiros no menor espaço de tempo e em diversas localizações. Por outro lado, a disponibilidade de diversas tecnologias de acesso sem fio como: Wi-Fi (Wireless Fidelity), WiMAX (Worldwide Interoperability for Microwave Access) e LTE (Long Term Evolution), proporcionam um cenário heterogêneo com diversas oportunidades de conectividade para o usuário de dispositivos com múltiplas interfaces. Alguns dos desafios atuais no contexto da concepção da então denominada NGN (Next Generation Networks) são o desenvolvimento de arcabouços e mecanismos que viabilizem tanto o suporte adequado à Qualidade de Serviço (QoS – Quality of Service) e à Qualidade de Experiência (QoE – Quality of Experience) para aplicações multimídia, quanto a garantia de equidade entre vazões de diferentes aplicações em ambiente heterogêneo. Esta dissertação propõe um arcabouço para o aprovisionamento de QoS e QoE em redes sem fio heterogêneas formada por redes WiMAX e Wi-Fi. Especificamente, nossa solução provê mapeamento estático de QoS entre as classes de serviços WiMAX e categorias de acesso Wi-Fi. Além disso, nossa proposta também combina funcionalidades de equidade entre vazões com a solução de mapeamento, a fim de alcançar um bom compromisso tanto para o operador da rede, quanto para o usuário, através de uma nova metodologia de coleta e calculo de vazão agregada e algoritmo de decisão de handover vertical. A avaliação quantitativa da proposta foi realizada através de modelos de simulação no ns-2 (Network Simulator). Os resultados de desempenho demonstram a eficiência da arquitetura em termos de métricas de QoS (vazão, vazão média e atraso) e QoE (PSRN - Peak Signal to Noise Ratio, SSIM - Structural Similarity Index e VQM - Video Quality Metric).<br>Recently, the society is living amid an agglomerate of mobile devices with multiple wireless interfaces that allow mobile customers home and business solve routine problems in the shortest time and in several locations. On the other hand, the availability of various wireless access technologies such as Wireless Fidelity (Wi-Fi), Worldwide Interoperability for Microwave Access (WiMAX) and Long Term Evolution (LTE), provide a heterogeneous scenario with several connectivity opportunities for the user of devices with multiple interfaces. Some of the current challenges in framing the so called Next Generation Networks (NGN) are the development of frameworks and mechanisms that enable both adequate support for Quality of Service (QoS) and Quality of Experience (QoE) for multimedia applications, and assurance equity among throughputs of different applications in a heterogeneous environment. This dissertation proposes a framework for provisioning of QoS and QoE in heterogeneous wireless networks consisting of WiMAX and Wi-Fi networks. Specifically, our solution provides static mapping of QoS between classes of service WiMAX and access categories Wi-Fi. In addition, our proposal also combines features of equity among throughputs with the mapping solution in order to achieve a good tradeoff for both, for the network operator and for the user, through a new methodology for collection and calculation of aggregate throughput and algorithm for Vertical Handover Decision (VHD). The quantitative evaluation of the proposal was carried out using simulation models in Network Simulator (NS-2). The performance results demonstrate the efficiency of the framework in terms of QoS (throughput, average throughput and delay) and QoE (Peak Signal to Noise Ratio, Structural Similarity Index and Video Quality Metric) metrics.
6
Grenar, Milan. "Kritické parametry pro bezdrátové sítě WiFi a WiMAX." Doctoral thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2015. http://www.nusl.cz/ntk/nusl-234419.
Full textAbstract:
My thesis will be aimed at problems of wireless networks WiFi and WiMAX. A modelling of network will be put into effect onto which the measurement will be implemented and the impacts of network load on the data transfer Quality of Service (QoS) will be examined with aiming at VoIP. On this network model a power failure will be simulated and the impacts of this failure after restoring the power supply will be monitored. The aim of this thesis is to check the rate of network throughput while preserving a providing service quality and to suggest an economica1ly acceptable solution of the problems relating to feeding tension outage of the access point (AP) for a practical usage in these networks.
7
Rosa, Eduardo Castilho. "Proposta de um esquema para a provisão de QoS no padrão IEEE 802.16." Universidade Federal de Uberlândia, 2011. https://repositorio.ufu.br/handle/123456789/14465.
Full textAbstract:
Fundação de Amparo a Pesquisa do Estado de Minas Gerais<br>The IEEE 802.16 standard is designed to provide wireless broadband connectivity for
both xed and mobile users in a wide coverage area with high rates of data transfer. The
main feature incorporated by the IEEE 802.16 standard is the quality of service (QoS)
provisioning by means of packets scheduling, trac policing and connection admission
control (CAC). Since the IEEE 802.16 standard does not dene the policies for admission
control and packet scheduling, in this paper we propose a QoS provisioning mechanism
which consists of a novel scheduling algorithm for uplink trac and a dynamic CAC
scheme for IEEE 802.16 networks. The proposed scheduling mechanism serves the requests
queues in a cyclical mode and is based on a static bandwidth reservation mechanism in
order to separate the real-time and non real time ows. The CAC policy is proposed for
the real-time service class with variable rate and is based on a delay prediction scheme
which uses the buer size information in SSs. Through modeling and simulation, we
evaluated various network scenarios in order to test the eciency of CAC and scheduling
mechanism. From the results, it was found that the proposed mechanism is able to meet
the maximum delay requirements of the maximum delay bound for real time ows and
minimum throughput for streams of non-real time. Moreover, it was found that the
proposed mechanism is able to avoid the bandwidth starvation of low priority ows.<br>O padrão IEEE 802.16 é designado para prover conectividade em banda larga sem
o para usuários xos e móveis em uma ampla área de cobertura com altas taxas de
transferência de dados. A principal característica incorporada por esse padrão é a provis
ão de qualidade de serviço (QoS) aos usuários nais, garantida por meio de algoritmos
para escalonamento de pacotes tanto na estação base como nas estações de assinantes e
também políticas para controle de admissão de conexões (CAC). Pelo fato do padrão não
especicar políticas para a implementação desses mecanismos, propõe-se nesse trabalho
um novo algoritmo de escalonamento uplink na estação base que é capaz de atender as
principais classes de serviços denidas pelo padrão e também uma política de CAC din
âmica baseada em predição de atraso. O mecanismo de escalonamento proposto atende
as las de requisições de forma cíclica e baseia-se em um esquema de reserva estática de
largura de banda para separar os uxos de tempo real, não tempo real com o requisito de
taxa mínima e não tempo real sem requisitos de vazão (tráfego de melhor esforço). Já a
política de CAC foi proposta para a classe de serviço de tempo real com taxa variável e
baseia-se na predição do atraso médio calculado de acordo com o estado de ocupação dos
buers nas estações assinantes. Avaliou-se, por meio de modelagem e simulação, vários
cenários de redes com o intuito de testar a eciência do mecanismo de escalonamento e
CAC. Pelos resultados obtidos, vericou-se que o mecanismo proposto é capaz de atender
os requisitos de atraso máximo limitado para uxos de tempo real e vazão mínima para
uxos de não tempo real. Além disso, constatou-se que o mecanismo proposto é capaz de
evitar o bandwidth starvation dos uxos de baixa prioridade.<br>Mestre em Ciências
8
Chammakhi, Msadaa Ikbal. "Gestion de la QoS et évaluation des performances des réseaux WiMAX dans les environnements fixes et à forte mobilité." Paris, ENST, 2010. http://www.theses.fr/2010ENST0038.
Full textAbstract:
Durant les deux dernières décennies, le développement dans le domaine des réseaux télécoms a façonné notre quotidien grâce au succès de l’accès sans fil et a créé chez le grand public un besoin accru en débit. La technologie WiMAX a émergé afin de répondre à ces nouveaux besoins. Basée sur le standard 802. 16, le WiMAX présente des éléments permettant de supporter les besoins en QoS de plusieurs types de trafics. Dans cette thèse, nous nous intéressons à la gestion de la QoS dans les réseaux WiMAX. En effet, bien qu’il présente des éléments permettant de véhiculer des données, de la voix ainsi que de la vidéo, le protocole MAC de la norme laisse ouverts les problèmes rattachés à l’ordonnancement et au contrôle d’admission; des éléments cruciaux pour l’amélioration de la QoS perçue par les utilisateurs. Nous avons évalué les performances du WiMAX d’abord en se plaçant dans un contexte fixe puis mobile (véhiculaire) en s’intéressant au WiMAX en tant que médium pour les communications V2I. Ensuite, en ce basant sur une étude approfondie de l’état de l’art, nous avons développé une architecture de gestion de la QoS pour les réseaux WiMAX. Cette architecture inclut (i) un ordonnanceur hiérarchique qui exploite la flexibilité de la trame 802. 16 pour adapter les proportions DL/UL à un trafic asymétrique, et (ii) un module de CAC basé sur une approche d’équité Max-Min. Cette approche néanmoins ne considère que les besoins en débit des différentes connexions. Une autre stratégie d’ordonnancement a donc été développée pour répondre aux contraintes de délais des trafics temps-réel. Cette stratégie, baptisée mCoSS se base sur un mécanisme de shaping inspiré du double seau à jetons<br>Driven by the growing demand for high-speed broadband services, WiMAX technology has emerged as a competitive alternative to wireline broadband access solution. WiMAX technology, considered in this thesis, offers an IP-based framework that provides high data rates at medium and long range with the ability of supporting fixed, nomadic, portable, and mobile access. Moreover, based on the IEEE 802. 16 standard, the technology provides a set of built-in QoS mechanisms to support heterogeneous classes of traffic including data, voice and video. The 802. 16 standard, however, leaves open the resource management and scheduling mechanisms, which are crucial components to guarantee QoS performance for these services. In this thesis, we evaluate the performance of WiMAX systems in both fixed and highly mobile environments. More particularly, mobile WiMAX is investigated as a V2I communication medium since it is expected to play a major role in ITS. Moreover, after surveying, classifying and comparing different scheduling and admission control mechanisms proposed in this work-in-progress area, we propose two QoS solutions. Both solutions address PMP systems operating in TDD mode. The first solution includes a hierarchical scheduling algorithm that adapts the DL/UL allocations to serve unbalanced traffic. The amounts of these grants are set by the CAC module that adopts a Max-Min fairness approach. The second QoS solution presented in this thesis is a multi-Constraints Scheduling Strategy (mCoSS). In addition to data rate constraints, it supports delay constraints of real-time applications and handles bursty traffics. MCoSS is based on a modified dual-bucket traffic shaping mechanism
9
Brahmia, Mohamed El Amine. "Mécanismes de contrôle de la qualité de services dans les réseaux WiMAX relais." Thesis, Mulhouse, 2012. http://www.theses.fr/2012MULH4074.
Full textAbstract:
Nous assistons ces dernières années à une émergence constante de nouvelles applications, notamment pour les services audiovisuels. Ces applications imposent au réseau un certain nombre de contraintes pour qu’elles puissent fonctionner correctement. Le développement de mécanismes permettant d’offrir une garantie à ces contraintes, est donc devenu un objectif crucial. La norme IEEE 802.16j est l’une des solutions sans fil qui propose plus de ressources afin de supporter les nouveaux services de télécommunications. Dans la présente thèse, nous focalisons notre étude sur la problématique de la qualité de service dans les réseaux WiMAX relais. Nos contributions se regroupent à travers les étapes ci-dessous : Nous proposons un protocole de routage multicast pour les services IPTV (HDTV, SD-TV, Web-TV et Mobile-TV). Ce protocole repose d’une part sur un nouveau mécanisme de construction de l’arbre multicast basé sur les nombres premiers et d’autre part, sur une nouvelle méthode d’agrégation basée sur le standard de compression Vidéo «SVC». L’objectif est de supporter l’hétérogénéité des utilisateurs tout en optimisant la consommation des ressources. Par ailleurs, nous étudions le problème d’ordonnancement dans les réseaux WiMAX. Nous proposons un algorithme d’ordonnancement adaptatif AWRR, ce dernier se base sur une technique à charge pondérée. L’objectif est d’ajuster dynamiquement le poids de chaque classe de service, en prenant en compte la charge de la file d’attente et les contraintes de la QoS. Enfin, nous nous intéressons à l’étude de la problématique du chemin optimal contraint. Nous proposons une solution déterministe basée sur une fonction de coût. Notre fonction permet aussi d’assurer le contrôle d’admission, elle se base sur deux fonctions de coût élémentaires qui prennent en compte quatre critères de QoS<br>Over recent years, new applications steadily developed in a tremendous space, especially in audiovisual services area. The present applications have some of constraints to work properly. The developments of mechanism which enable to overcome these constraints become a critical issue in this area. The IEEE 802.16j standard is one of wireless communication technology which offering more resources to support new telecommunication services. In this thesis, we focus our research on the problem of quality of service (QoS) inWiMAX relay networks. Our contributions are classified as follows : we proposed a multicast routing protocol for IPTV services (such as HD-TV, SD-TV, Web-TV and Mobile-TV). This proposed protocol used a new multicast tree construction mechanism based-on prime numbers. We also developed a new aggregation method based on standard video compression called Scalable Video Coding (SVC). Our goal is to support user’s heterogeneity while optimizing resources consumption. In addition, we studied the problem of scheduling inWiMAX networks.We proposed an adaptive scheduling algorithm AWRR for IPTV services. The aim of this method is to support QoS constraints by using two schedulers, and assigning a dynamic value to each service queue. Finally, we interested to study about the problem of path selection. We proposed a solution based on a deterministic cost function. This function also ensures admission control based on two basic cost functions which include four QoS criteria. This thesis has been prepared in the MIPS/GRTC laboratory, University of Haute Alsace, under a research contract external (CRE) framework with France Telecom R&D. All proposed mechanisms were evaluated by the simulator QualNet, Matlab and mathematical analysis
10
Laias, Elmabruk M. "Performance Analysis and Enhancement of QoS Framework for Fixed WiMAX Networks. Design, analysis and evaluation of 802.16 Point-to-Multipoint (PMP) Quality of Service Framework based on uplink scheduler and call admission control analysis." Thesis, University of Bradford, 2009. http://hdl.handle.net/10454/4318.
Full textAbstract:
Given the current developments and advances in the scientific and technological aspects of human knowledge and introducing new approaches in various fields of telecommunication technologies and industries, there has been an increasing growth in its players' plans and a positive change in their outlooks in order to achieve the target of "anywhere and anytime access". Recent developments of WiMAX (Worldwide interoperability for Microwave Access) networks, as a sign of increasing needs and demands for new telecommunication services and capabilities, have led to revolutions in global telecommunication which should be perceived properly in terms of the commercial and technical aspects in order to enjoy the new opportunities. Most experts believe that WiMAX technology is a preliminary step to develop Fourth Generation networks known as 4G technologies. It has not only succeeded in the utilization of several of the latest telecommunication techniques in the form of unique practical standards, but also paved the way for the quantitative and qualitative developments of high-speed broadband access. IEEE 802.16 Standard introduces several advantages, and one of them is the support for Quality of Services (QoS) at the Media Access Control (MAC) level. For these purposes, the standard defines several scheduling classes at MAC layer to treat service flow in a different way, depending on QoS requirements. In this thesis, we have proposed a new QoS framework for Point-to-Multi Point (PMP) 802.16 systems operating in Time Division Duplexing (TDD) mode over a WirelessMAN-OFDM physical layer. The proposed framework consists of a Call Admission Control (CAC) module and a scheduling scheme for the uplink traffic as well as a simple frame allocation scheme. The proposed CAC module interacts with the uplink scheduler status and it makes its decision based on the scheduler queue status; on the other hand, the proposed scheduling scheme for the uplink traffic aims to support realtime flows and adapts the frame-by-frame allocations to the current needs of the connections, with respect to the grants boundaries fixed by the CAC module. Extensive OPNET simulation demonstrates the effectiveness of the proposed architecture.
Books on the topic "QoS in WiMAX"
3
(Editor), Syed A. Ahson, and Mohammad Ilyas (Editor), eds. WiMAX: Technologies, Performance Analysis, and QoS (Wimax Handbook). CRC, 2007.
Find full text
4
Ilyas, Mohammad, and Syed Ahson. Wimax: Technologies, Performance Analysis, and Qos. the Wimax Handbook. Taylor & Francis Group, 2008.
Find full text
5
Ahson, Syed, and Mohammad Ilyas. WiMAX: Technologies, Performance Analysis, and QoS. Taylor & Francis Group, 2018.
Find full text
6
Ahson, Syed, and Mohammad Ilyas. WiMAX: Technologies, Performance Analysis, and QoS. Taylor & Francis Group, 2018.
Find full text
7
Ahson, Syed, and Mohammad Ilyas. WiMAX: Technologies, Performance Analysis, and QoS. Taylor & Francis Group, 2018.
Find full textBook chapters on the topic "QoS in WiMAX"
1
Krichene, Neila, and Noureddine Boudriga. "QoS in Mobile WiMAX." In WiMAX Security and Quality of Service. John Wiley & Sons, Ltd, 2010. http://dx.doi.org/10.1002/9780470665749.ch6.
Full text
2
Gupta, Pooja, Brijesh Kumar, and B. L. Raina. "QoS Support Downlink for WiMAX Network." In Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering. Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-37949-9_85.
Full text
3
Kumari, Kiran, Srinath Narasimha, and Krishna M. Sivalingam. "QoS Issues and Challenges in WiMAX and WiMAX MMR Networks." In WiMAX Security and Quality of Service. John Wiley & Sons, Ltd, 2010. http://dx.doi.org/10.1002/9780470665749.ch10.
Full text
4
Alasti, Mehdi, and Behnam Neekzad. "Quality of Service (QoS) in WiMAX Networks." In WiMAX Technology and Network Evolution. John Wiley & Sons, Inc., 2011. http://dx.doi.org/10.1002/9780470633021.ch10.
Full text
5
Aguado, Marina, Eduardo Jacob, Marion Berbineau, and Ivan Lledo Samper. "QoS Challenges in the Handover Process." In WiMAX Security and Quality of Service. John Wiley & Sons, Ltd, 2010. http://dx.doi.org/10.1002/9780470665749.ch8.
Full text
6
Vijayalakshmy, G., and G. Shivaradje. "WiMAX and WiFi Convergence Architecture to Achieve QoS." In Communications in Computer and Information Science. Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-29219-4_58.
Full text
7
De Rango, Floriano, Andrea Malfitano, and Salvatore Marano. "Cross-Layer End-to-End QoS Architecture: The Milestone of WiMAX." In WiMAX Security and Quality of Service. John Wiley & Sons, Ltd, 2010. http://dx.doi.org/10.1002/9780470665749.ch5.
Full text
8
Wang, Xinbing, Shen Gu, Yuan Wu, and Jiajing Wang. "QoS Simulation and An Enhanced Solution of Cell Selection for WiMAX Network." In WiMAX Security and Quality of Service. John Wiley & Sons, Ltd, 2010. http://dx.doi.org/10.1002/9780470665749.ch12.
Full text
9
Rabbani, Md Golam, Joarder Kamruzzaman, Iqbal Gondal, Iftekhar Ahmad, and Md Rafiul Hassan. "Dynamic Resource Allocation for Improved QoS in WiMAX/WiFi Integration." In Software Engineering, Artificial Intelligence, Networking and Parallel/Distributed Computing 2011. Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-22288-7_12.
Full text
10
Mohammad, Siti H., Nadiatulhuda Zulkifli, and Sevia M. Idrus. "QoS-aware Mapping and Scheduling for Integrated CWDM-PON and WiMAX Network." In Lecture Notes in Electrical Engineering. Springer Berlin Heidelberg, 2015. http://dx.doi.org/10.1007/978-3-662-46578-3_1.
Full textConference papers on the topic "QoS in WiMAX"
1
Karim, Ehab, Heba Nashaat, and Rawya Y. Rizk. "QoS management in WiMAX Femtocells." In 2015 11th International Computer Engineering Conference (ICENCO). IEEE, 2015. http://dx.doi.org/10.1109/icenco.2015.7416348.
Full text
2
Haisch, F. "QoS in Wi-fi mesh and WiMAX networks." In IEE WiMax and Mesh Networks Forum. IEE, 2005. http://dx.doi.org/10.1049/ic:20050358.
Full text
3
Ajayi, E. A., H. Idris, W. D. Daniel, and U. C. Arinze. "Quality of Service (Qos) Aware Power Saving Scheme in IEEE 802.16e Networks." In 27th iSTEAMS-ACity-IEEE International Conference. Society for Multidisciplinary and Advanced Research Techniques - Creative Research Publishers, 2021. http://dx.doi.org/10.22624/aims/isteams-2021/v27p3.
Full textAbstract:
Wireless telecommunication networks have become fundamental to our daily activities. Today, people have access to at least one type of wireless telecommunication network with Mobile Stations (MS) supporting multiple applications that consume more battery power; as well as a constant increase in multimedia applications that possess a critical challenge in efficient battery management. MSs are battery powered devices with limited lifetime. An efficient management of the battery will extend its lifetime before recharging exercise is conducted. World Wide Interoperability for Microwave Access (WiMAX), is design to Supports Higher Bandwidth with different traffic classes support for Power Management. Due to the mobility Characteristics introduced in WiMAX, power savings became an important problem; Since MS has limited superimpose life that requires recharging exercise when the battery life is depleted. Thus, Battery Lifetime Aware Power Saving Scheme (BLAPS) and an Adaptive Power Saving Scheme were proposed to extend the Battery Life, but the first scheme resulted in frequent transition to listening mode which led to waste of energy. While the former has higher energy consumption resulting to poor QoS that degrades the overall performance of MS. Hence, a Quality of Service (QoS) Aware Power Saving Scheme is proposed to improve the QoS. The scheme introduced a Modified minimum (Tmin) and Maximum (Tmax) sleep intervals in order to enhance the parameters of the variant schemes. In addition, the scheme also introduced a modified sleep window as well as QoS Aware algorithm that enable the adjustments of the sleep Parameters more appropriately in order to minimize frequent Transition to listening mode while improving efficiency. Finally, a state transition diagram was also developed. The proposed scheme was evaluated using MATLAB simulator; the results proved that the proposed QoS Aware Scheme has superior performance in terms of consumption rate and response delay respectively. Keywords: Battery Life, Power Consumption, Response Delay.
4
Shrestha, Pradhumna Lal, Michael Hempel, Hamid Sharif, and Shahram Mehrvarzi. "Mobile WiMAX Performance, Applications, and Deployment Considerations for North America’s Freight Railroad Industry." In 2012 Joint Rail Conference. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/jrc2012-74111.
Full textAbstract:
With the anticipation of Positive Train Control (PTC), as well as many other advanced rail applications, a modern end-to-end communication network infrastructure has become an essential requirement for the North American railroad industry. One focus area is on wireless technologies for track-side and yard deployments. Among the available broadband technologies, Mobile WiMAX has emerged as the most favorable solution for deployment in such an environment. It provides high throughput, large coverage and the support for many diverse applications, with attractive features like seamless handover, Quality-of-Service (QoS), the recovery from packet loss through mechanisms like Hybrid-Automatic Repeat reQuest (H-ARQ) and vehicular mobility support. In this paper, we provide an overview of our research endeavors in evaluating Mobile WiMAX. We discuss our design and implementation of Mobile WiMAX computer model based on Network Simulator 2 (NS-2), which can simulate sophisticated scenarios frequently encountered by the railcars. We describe our experience in setting up our WiMAX testbeds in Ashland, NE and Logan, IA, utilizing the infrastructure from BNSF and UP in those locations, respectively. Since our test beds serve as prototypes, similar design principles can be applied for the eventual large-scale nationwide network deployment by the railroad industry. Furthermore, we present laboratory and field test results that clearly validate our design principles and demonstrates the advantages of Mobile WiMAX deployments for railroad operations.
5
Rengaraju, Perumalraja, Chung-Horng Lung, and Anand Srinivasan. "QoS Assured Uplink Scheduler for WiMAX Networks." In 2010 IEEE Vehicular Technology Conference (VTC 2010-Fall). IEEE, 2010. http://dx.doi.org/10.1109/vetecf.2010.5594592.
Full text
6
Prasath, G. Arul, Cheng Peng Fu, and Maode Ma. "QoS scheduling for group mobility in WiMAX." In 2008 11th IEEE Singapore International Conference on Communication Systems (ICCS). IEEE, 2008. http://dx.doi.org/10.1109/iccs.2008.4737464.
Full text
7
Belghith, Aymen, Loutfi Nuaymi, and Patrick Maille. "Pricing of Differentiated-QoS Services WiMAX Networks." In IEEE GLOBECOM 2008 - 2008 IEEE Global Telecommunications Conference. IEEE, 2008. http://dx.doi.org/10.1109/glocom.2008.ecp.990.
Full text
8
Mohamed, Mohamed A., Mohey E. Abou-ElSeoud, and Hegazi Ibrahim. "Improving QoS of IPTV over WiMAX Networks." In 2013 23rd International Conference on Computer Theory and Applications (ICCTA). IEEE, 2013. http://dx.doi.org/10.1109/iccta32607.2013.9529804.
Full text
9
Manda-Vy, Ravonimanantsoa Ndaohialy, and Hery Zojaona Tantely Reziky Zafimarina Stefana. "Conversational QoS comparison between WiMAX and UMTS." In 2013 Third International Conference on Innovative Computing Technology (INTECH). IEEE, 2013. http://dx.doi.org/10.1109/intech.2013.6653687.
Full text
10
Manda-Vy, Ravonimanantsoa Ndaohialy, and Hery Zojaona Tantely Reziky Zafimarina Stefana. "Conversational QoS comparison between WiMAX and UMTS." In 2013 World Congress on Computer and Information Technology (WCCIT). IEEE, 2013. http://dx.doi.org/10.1109/wccit.2013.6618678.
Full text