quality of service in an opportunistic capability utilization network

... Round robin "bit per bit" each packet marked with the transmission instant of the last bit l served in the order of instants l Queue Management 21 Weighted Fair Queueing o Fair queueing l equal ... 1Mbps and an FTP application sharing a 1.5 Mbps link l l bursts of FTP can congest the router and cause audio packets to be dropped want to give priority to audio over FTP o PRINCIPLE 1: Marking of ... requirements; Marking and Policing need to be done at the edges: Queue Management Principles for QOS Guarantees (more) o Alternative to Marking and Policing: allocate a set portion of bandwidth to each...

Ngày tải lên: 06/04/2013, 11:05

... also of interest in the context of demand modeling and provisioning For instance, [27] is using a ΔT = interval when measuring the point-to-point traffic matrix in the IP backbone Data are analyzed ... reflects the Quality of Service from the viewpoints of the application and user The focus of the thesis is on the in uence of the network on the applicationperceived Quality of Service and thus the ... research in the field application-perceived Quality of Service The work was done at the School of Engineering at Blekinge Institute of Technology (BTH) in the context of the Personal Information for Intelligent...

Ngày tải lên: 18/10/2013, 12:15

... 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 6.5 Conclusion and ... This 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 ... a minimum, the QoS issues pertaining to delay and bandwidth management are of paramount interest In addition, because of the use of the ad hoc networks for military or police use, and of increasingly...

Ngày tải lên: 25/03/2014, 12:07

... Engineering and Computer Science in the University of Patras, Greece His main interests are wireless networks, quality of service, and network management Ioannis Papapanagiotou has been studying ... length is very important for the quality of ongoing transmissions since an increase in the frame would cause a deterministic amount of delay in the system This also implies that an admission strategy ... studying in the Electrical and Computer Engineering School of University of Patras, Greece, since 2001, and he is currently in his last year of studies His interests include wireless local area networks...

Ngày tải lên: 22/06/2014, 22:20

... Communications and Networking, for International Journal of Computer and Their Applications, for International Journal of Sensor Networks, and for International Journal of High Performance Computing and Networking ... Western Michigan University He received his B.S (with distinction) and M.S degrees in electrical engineering; M.S and Ph.D degrees in computer engineering in 1984, 1986, 1987, and 1990, respectively, ... his Ph.D degree from the Chinese Academy of Sciences in 1994 Dr Li’s research interests are in the routing protocols and security in wireless internet and mobile ad hoc networks; algorithms, complexity,...

Ngày tải lên: 22/06/2014, 22:20

... CHAPTER 10 QUALITY OF SERVICE IN THE IMS LS semantics are typically used to group an audio and a video stream, as shown in Figure 10.1 The a=group line carries the semantics of the group (LS in this ... P-CSCF adds SRF info to an incoming 183 response 273 CHAPTER 10 QUALITY OF SERVICE IN THE IMS 274 encryption mechanisms like S/MIME (described in Section 11.4) are not allowed in the IMS Section ... to exchange SIP signaling right after performing a GPRS attach, as shown in Figure 10.5 The information stored by the network regarding this PDP context includes the terminal’s IP address and the...

Ngày tải lên: 01/08/2014, 17:21

... 1.2.1 Adaptive Bandwidth Provisioning for QoS in UMTS Core Network Proper handling of Quality of Service is required for the UMTS core network to handle multiple services ranging from Voice over ... number of flows utilizing the link and r is the link capacity This is however the amount of bandwidth guaranteed to an aggregate flow and does not guarantee anything for individual flows within the ... Next-Generation UMTS Networks CHAPTER NEXT-GENERATION UMTS NETWORKS 2.1 INTRODUCTION Imagine the possibility of communicating and accessing information anytime, anyhow and anywhere This dream...

Ngày tải lên: 08/11/2015, 16:30

... case studies Input Scheduling Classification and Marking Quality of service (QoS) is the set of techniques designed to manage network resources QoS Mapping refers to the capability of a network to ... Classification Marking Policing and Shaping Congestion Management and Scheduling • • Table of Contents Congestion Avoidance Index Summary Cisco Catalyst QoS: Quality of Service in Campus Networks Chapter ... TeleRouter, TransPath, and VCO are registered Quality of service trademarks of Cisco (QoS) Systems, is the Inc set of and/or techniques its affiliates designed in the to manage U.S andnetwork certain other...

Ngày tải lên: 11/10/2016, 18:11

... wavelength These are software QoS enhancement mechanisms An introduction of the hardware QoS enhancement mechanisms can be found in Section 1.3 of Chapter 18 Chapter QoS In OBS Networks: An Overview 19 ... the network operators, they are capable of attracting more customers and hence making more prot out of their investments QoS can be enhanced using software methods and hardware methods Software ... burden of electronic processing and not decreasing the data transmission rate in OBS networks There are multiple ways of achieving alloptical wavelength conversion [8] An example of using FDLs and...

Ngày tải lên: 11/09/2015, 16:05

... provide information on a wide range of potentially relevant issues) and allows easy administration of general instructions in any language It has the inherent advantage of determining and rating ... generated index provides a useful and possibly advantageous alternative The index offers inherent advantages by incorporating the patients' viewpoint, The authors declare that they have no competing interests ... (Mean Score = 0.6, 1.8 and 1.8 respectively) Subjects from the high and middle income groups spent the highest number of spending points on physical problems (Mean spending points = 4.1) and...

Ngày tải lên: 18/06/2014, 19:20

... Berg H, van den Berg E, Bökkerink J, Bruin M, van den Heuvel-Eibrink M, Korbijn C, Korthof E, van der Pal K, Stijnen T, van Weel Sipman MH, van Weerden JF, van Wering ER, van der Does-van den Berg ... between poor quality of sleep and impaired health-related quality of life and well being has been found in several populations, such as children with chronic pain and survivors of childhood cancer [13,17,20,21] ... involved in the drafting and critical revision of the manuscript RME and PHO helped with the acquisition of data and critically revised the manuscript All authors have given final approval of the...

Ngày tải lên: 20/06/2014, 15:20

... chapters include both theoretical and technical information, which provides an in depth review of the most recent advances in the field for engineers and researchers, and other readers interested in ... guarantee Section describes the scheduling algorithms found in the literature in accordance with the classification of the scheduling mechanisms provided in the Section Quality of Service and ... Mechanisms scheduling is more complex than downlink scheduling In the uplink scheduling, the input queues are located in the SSs and are hence separated from the BS So, the BS does not have any information...

Ngày tải lên: 21/06/2014, 05:20

... to optimizing the channel utilization while at the same time avoiding waste of bandwidth by transmitting over high loss links Power constrain and simplicity: Be considerate of the terminals’ battery ... the SSs can be handled by the network A CAC algorithm will admit a SS into the network if it can ensure that the minimum QoS requirements of the SS can be satisfied and the QoS of existing SSs ... 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

... 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 ... been created, including O Andrisano, M Chiani, A Conti, D Dardari, G Leonardi, B.M Masini, G Mazzini, V Tralli, R Verdone, and A Zanella 130 Quality of Service and Resource Allocation in WiMAX Will-be-set-by -IN- TECH ... Thanabalasingham, T., Hanly, S V., Andrew, L L H & Papandriopoulos, J (2006) Joint allocation of subcarriers and transmit powers in a multiuser OFDM cellular network, Proceedings of the IEEE International...

Ngày tải lên: 21/06/2014, 05:20

... mechanism is 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, ... 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 bandwidth, ... Modulation and Coding scheme (AMC) It is an adaptive modification of the combination of modulation, channel coding types and coding rate also known as burst profile that takes place in the physical link...

Ngày tải lên: 21/06/2014, 05:20

... fixed and mobile broadband wireless access In the standard (IEEE 802.16 standard, 2009), it defines several air interface variants, including WirelessMAN-SC, WirelessMAN-OFDM, WirelessMAN-OFDMA and ... 2004 Part Quality of Service Models and Evaluation A Unified Performance Model for Best-Effort Services in WiMAX Networks Jianqing Liu1 , Sammy Chan1 and Hai L Vu2 City Swinburne University of Hong ... Combined Fixed and Mobile Operation in Licensed Bands Jeffrey G et al (2007) Fundamentals of WiMAX Understanding Broadband Wireless Networking, Prentice Hall Communications Engineering and Emerging...

Ngày tải lên: 21/06/2014, 05:20

... uplink channel and the UL-MAP contains the physical specifications and also the time allocation of 202 Quality of Service and Resource Allocation in WiMAX resources After the downlink and uplink ... seamless handover, when the video 210 Quality of Service and Resource Allocation in WiMAX quality was maintained during the change of BS The SS that experienced a hard handover did not receive 5% of ... for managing and maintaining the QoS for all of the packet transmissions The BS manages this by actively distributing usage time to subscriber stations through information embedded in the transmitted...

Ngày tải lên: 21/06/2014, 05:20

... results of assessing quality of VoIP (Voice Over IP) conversations CTC and nbLDPC codes are compared in terms of system capacity and resulting quality of experience (QoE) performance of VoIP ... experiences situations, in which connection requests arrive in large batches? 218 Quality of Service and Resource Allocation in WiMAX Since QoS support is an important part of WiMAX network, the system ... is put on the main differences in handling QoS in both 4G systems Even though the underling technologies differ in many aspects, it is important to Evaluation of QoS and QoE in Mobile WIMAX –...

Ngày tải lên: 21/06/2014, 05:20

... 242 Quality of Service and Resource Allocation in WiMAX [37] J Zhang, H Zheng, Z Tan, Y Chen, „Principle of Link Evaluation“, Communications and Network, 2009 06-19 p.6-19 ... contribute to human safety and healthcare 246 Quality of Service and Resource Allocation in WiMAX E (electronic)-health terminology lumps a variety of medicine and communication services associated ... Virtual multi-disciplinary team meeting in Cancer Care • Support for Minor Injury Units • Training and supervision • Prison to hospital Remote monitoring of physiological or daily living signs (real...

Ngày tải lên: 21/06/2014, 05:20

... overflow, routing (in ad hoc and mesh networks), and resource management In WiMAX multicast mode, scheduling decisions for the real-time Polling Service (rtPS) queue, one of the WiMAX quality of service ... in mind, though improvements in performance remain the goal Performance may be defined variously in terms of reduction of delay, reduction of errors, throughput efficiency, and, in wireless networks, ... While Degrande et al (2008) have managed networks using IP framing but not ‘best-effort’ routing in mind, CDNs such as iBeam and Limelight originated for the unmanaged Internet Microsoft TV IPTV...

Ngày tải lên: 21/06/2014, 05:20