quality of service assessment in new generation wireless video communications

... enrolment and obtaining informed consent, an explanation of the handling of the QL-recorder to participating patients, interpretation and use of results during the consultation Training sessions took ... Alonso J, Clinical Significance Consensus Meeting Group: Exploration of the value of healthrelated quality- of- life information from clinical research and into clinical practice Mayo Clin Proc 2007, ... Miravitlles M: Interpretation of quality of life scores from the St George's Respiratory Questionnaire Eur Respir J 2002, 19:405-413 Higginson IJ, Carr AJ: Measuring quality of life: Using quality of life...

Ngày tải lên: 18/06/2014, 18:20

... determinants: monthly income level of parents and assigned hospital class during the diagnostic process Both determinants are obtained routinely during admission to the clinic and recorded in the ... n = 42 in the non-intensive phase), ** self-reports (n = 22 in intensive treatment and n = 24 in non intensive treatment); proxy-reports (n = 31 in intensive treatment and n = 33 in non intensive ... Higher score indicate higher quality of life or fewer problems; *self-reports (n = 27 in the intensive phase and n = 28 in the non-intensive phase); proxy-reports (n = 56 in the intensive phase...

Ngày tải lên: 18/06/2014, 19:20

... determinants: monthly income level of parents and assigned hospital class during the diagnostic process Both determinants are obtained routinely during admission to the clinic and recorded in the ... n = 42 in the non-intensive phase), ** self-reports (n = 22 in intensive treatment and n = 24 in non intensive treatment); proxy-reports (n = 31 in intensive treatment and n = 33 in non intensive ... Higher score indicate higher quality of life or fewer problems; *self-reports (n = 27 in the intensive phase and n = 28 in the non-intensive phase); proxy-reports (n = 56 in the intensive phase...

Ngày tải lên: 20/06/2014, 16:20

... research interests are multimedia networking, wireless networking, video streaming and quality of service She was a program co-chair of the IEEE International Workshop on Semantic Computing and ... et al [5] studied two ways of emphasizing Region of Interest (ROI), zooming in and enhancing the quality to optimize the overall user experience of viewing sports videos on mobile phones It found ... An Optimized Scheduling Scheme to Provide Quality of Service in 802.11e Wireless LAN Proceedings of the Fifth IEEE International Workshop on Multimedia Information Processing and Retrieval (IEEE...

Ngày tải lên: 21/06/2014, 06:20

... burst introduces long delay and the centralized nature of this scheme does not scale well in long-haul backbone networks 1.3 Quality Of Service In OBS Networks Quality of service (QoS) in OBS ... determining routes for connections In OBS networks, trac engineering is utilized to reduce the burst loss probability and can be realized either online or oine Existing online algorithms in the ... accordingly Besides, some applications (e.g video conferencing and online gaming) have more stringent operating requirements than other applications (e.g email and web browsing) QoS provisioning...

Ngày tải lên: 11/09/2015, 16:05

... evaluation of the investment project involving lending activity of the commercial banks 1.4.2 The indicators to the quality of the financial evaluation of the investment project involving lending activity ... evaluation of the investment project involving lending activity of the commercial banks 1.4.1 The definition of the quality of the financial evaluation of the investment project - Check before lending ... the quality of the financial evaluation of the investment project involving lending activity of the commercial banks CHAPTER THE REAL SITUATION OF THE QUALITY OF THE FINANCIAL EVALUATION ON INVESTMENT...

Ngày tải lên: 02/05/2016, 23:12

... University of Thessaloniki (2002) He is currently in the process of defending his Ph.D thesis in telecommunications in the School of Electrical Engineering and Computer Science in the University of Patras, ... His main interests are wireless networks, quality of service, and network management Ioannis Papapanagiotou has been studying in the Electrical and Computer Engineering School of University of Patras, ... the Wireless Telecommunications Laboratory and has been developing his professional life teaching and doing research in the scientific area of telecommunications, with interest in mobile communications, ...

Ngày tải lên: 22/06/2014, 22:20

... Department of Telecommunication Systems Department of Telecommunication Systems School of Engineering School of Engineering Publisher: Blekinge Institute of Technology Blekinge Institute of Technology ... On Application-Perceived Quality of Service in Wireless Networks Stefan Chevul Department of Telecommunication Systems School of Engineering Blekinge Institute of Technology SWEDEN c � 2006 Stefan ... in uence of the network on the application-perceived Quality of Service is of great significance when it comes to customer satisfaction Therefore, application-perceived Quality of Service in wireless...

Ngày tải lên: 18/10/2013, 12:15

... reading 5.9 References Quality of service 6.1 Introduction 6.2 Routing in mobile ad hoc networks 6.3 Routing with quality of service constraints 6.4 Quality of service routing in ad hoc networks ... with providing quality of service (QoS) in ad hoc networks It should be pointed out that security and quality of service are two distinct attributes that are independent of each other in general ... page intentionally left blank SECURITY AND QUALITY OF SERVICE IN AD HOC WIRELESS NETWORKS Ensuring secure transmission and good quality of service (QoS) are key commercial concerns in ad hoc wireless...

Ngày tải lên: 25/03/2014, 12:07

... Principles o Traffic shaping l l leaky bucket token bucket o Scheduling strategies l l l l l FIFO Priority Round Robin Fair Queueing RED o IntServ o DiffServ Queue Management Improving QOS in ... l single loss recovered by Fast Retransmit o Probability p of choosing a given flow is proportional to the rate of the flow l more packets of that flow, higher probability of choosing one of ... Management Principles for QOS Guarantees (more) o Alternative to Marking and Policing: allocate a set portion of bandwidth to each application flow; can lead to inefficient use of bandwidth if one of the...

Ngày tải lên: 06/04/2013, 11:05

... Networks New Network Architecture Reduce Network Costs and Improve Quality of Service Improving Grade of Service (GOS) While Reducing RF Channels Wireless service providers are adopting new deployment ... below: By combining two of these radiating points into a single BTS sector and increasing the base radio count of that sector to 10RFcs (26-29 interconnect voice trunks maximum), trunking efficiencies ... application of LRCS in two separate 2:1 simulcast configurations In the original metro “RF hotel” configuration of five radiating points (a traditional BTS deployment of one radiating point per sector),...

Ngày tải lên: 10/12/2013, 19:15

... and teaching facility that is part of the Pratt School of Engineering As a new, four-building complex that houses research and teaching for bioengineering, communications and photonics, the Fitzpatrick ... communications and photonics, the Fitzpatrick Center was an ideal place to begin deploying in- building wireless “We knew about in- building wireless systems and wanted to a pilot deployment, so the Fitzpatrick ... a post office), and a new extension (opened in 2005) of the 122,000 square foot Bostock library Both of these projects are scheduled for completion in the spring of 2006 “We’re developing a master...

Ngày tải lên: 21/12/2013, 07:17

... picks-up the packets destined to it The uplink Scheduling Mechanisms scheduling is more complex than downlink scheduling In the uplink scheduling, the input queues are located in the SSs and are hence ... presents a synthesis table of the main scheduling mechanisms and highlights the main points of each of them Section does the final consideration of this chapter WiMAX MAC scheduling and QoS: Issues ... downlink scheduling, others on uplink scheduling, and others on both scheduling (downlink and uplink) The Figure shows the general classification of WiMAX scheduling mechanisms Taking into account...

Ngày tải lên: 21/06/2014, 05:20

... uplink traffic strongly depends on the CAC algorithm Scheduling has also been studied intensively in many disciplines, such as CPU task scheduling in operating systems, service scheduling in ... are certain characteristics of the wireless environment that make scheduling particularly challenging Five major issues in wireless scheduling are identified in [9]:      Wireless link variability: ... for the remaining users under high SINR assumption 114 Quality of Service and Resource Allocation in WiMAX Will-be-set-by -IN- TECH 10 3) Power minimization with individual rate constraints Now assume...

Ngày tải lên: 21/06/2014, 05:20

... pseudorandomly, thereby resulting in interference averaging as explained in Byeong Gi Lee & Sunghyun Choi (2008) 118 Quality of Service and Resource Allocation in WiMAX Will-be-set-by -IN- TECH 14 denotes ... effectively exploit the increased amount of resources in order to improve the overall quality- of- service provided to users, for instance reducing the blocking probability or increasing the perceived ... in a single RAT scenario Most of the research effort is thus on the vertical handovers management, in order to optimize the resource usage, maintaining an adequate quality- of- service and acting...

Ngày tải lên: 21/06/2014, 05:20

... left to the choice of the provider State of the art 3.1 Bandwidth sharing strategies: background To maintain a quality of service required by the constraining and restricting services, there are ... been defined in the standard Scheduling In WiMAX, the scheduling mechanism consists of determinating the information element (IE) sent in the UL MAP message that indicates the amount of the allocated ... must be used for the SS 150 Quality of Service and Resource Allocation in WiMAX Will-be-set-by -IN- TECH In fact, using the channel quality feedback indicator, the downlink SNR is provided by the...

Ngày tải lên: 21/06/2014, 05:20

... SSs In this chapter, we focus on the WirelessMAN-SC air interface operating in the PMP mode In WiMAX networks, quality of service (QoS) is provided through five different services classes in the ... structure defined in the IEEE 802.16 standard for TDD in PMP mode is shown in Fig Each frame has a duration of Δ and is divided into uplink and downlink subframes At the beginning of a downlink subframe, ... used in the outer set of fixed point equations evolving around the traffic load of an SS, ρ In the following, we will develop the outer set of fixed point equations for ρ 3.2 Mean service time of...

Ngày tải lên: 21/06/2014, 05:20

... applications crossing wired links In the latter, several IEEE 802.16 QoS services can be defined to provide service differentiation in the wireless interface (IEEE 802.16e, 2005) Four services designed ... with a wireless interface linked to one or more hosts of a WiMAX network These devices can initiate a new connection once the presence of a new base in an ASN has been verified The ASN is the ingress ... a mandatory set of QoS parameters that must be included in the service flow definition when the class of service is adapted to a service flow The main parameters are the following: traffic priority,...

Ngày tải lên: 21/06/2014, 05:20

... ways, e.g by signalling AC algorithm to block a part (or all) of the new connections requests, changing downlink / uplink scheduling priorities, or even by dropping some of the ongoing connections ... generating constant amount of traffic can require different number of OFDM symbols (/OFDMA slots) Therefore achieved transfer rates of a wireless link can vary significantly over short period of ... fundamental knowledge of the behaviour of the air interface Key performance indicators include spectral efficiency, robustness of the codes and modulations, influence of the HPA non linearity and so...

Ngày tải lên: 21/06/2014, 05:20

... operating layer is able to classify the incoming SDU by addressing to cross-layer table for inserting the correct information in the defined header field to inform lower layer of the requested services ... advantages in E-health wireless communications There have recently been exposed research initiatives aimed at investigating of E-health system models within a wireless- supported framework In (Y Lin, ... resolving of ever-struggling challenge of optimal bandwidth allocation between competitive data-consuming applications in wireless communications The introduced approach for combined utilization of...

Ngày tải lên: 21/06/2014, 05:20