standards of quality of service regulations 2012

... field of standards-metrology-quality In field of standards-metrology-quality, public technical service organizations are the ones which have functions and duties to conduct technical services ... establishment of standards, norms, technical regulations and etc to meet requirements of State management functions Actually (in 2014), there are 4 Centers of Standards-Metrology-Quality technical services ... remaining 90% of operation finance II ACTUAL PRACTICE OF SHIFTING TO CONTROL AND ORGANIZATIONS IN FIELD OF STANDARDS-METROLOGY-QUALITY IN VIETNAM 1 Global issues of public technical service organizations

Ngày tải lên: 03/02/2020, 14:28

... throughput reflects the Quality of Service from the viewpoints of the applica- tion and user The focus of the thesis is on the influence of the network on the perceived Quality of Service and thus the ... network on the application-perceived Quality of Service is of great significan- wire-ce when it comes to customer satisfaction refore, application-perceived Quality of Service in wireless networks must ... 3On Application-Perceived Quality of Service in Wireless Networks Stefan Chevul Trang 5Department of Telecommunication SystemsSchool of Engineering Blekinge Institute of Technology SWEDEN Trang

Ngày tải lên: 18/10/2013, 12:15

... significance of Quality of Service (QoS) • Describe new Quality of Service (QoS) features in Cisco IOS 12.1 • Explain which problems QoS solves The purpose of this module is to quickly survey the new Quality ... Introduction to Quality of Service Introduction to Quality of Service Trang 2Copyright © 2000, Cisco Systems, Inc 2Keep All Graphics Inside This Box Objectives Upon completion of this module, ... database access • Tailored services—If you are an Internet Service Provider (ISP), the control and visibility provided by QoS enables you to offer carefully tailored grades of service differentiation

Ngày tải lên: 11/12/2013, 14:15

... BOARD OF INDIA (ALTERNATIVE INVESTMENT FUNDS) REGULATIONS, 2012 LAD-NRO/GN/2012-13/04/11262 — In exercise of the powers conferred by sub-section (1) of Section 30 read with sub-section (1) of ... clause (c) of sub-section (2) of Section 11 and sub-section (1) and (1B) of Section 12 of the Securities and Exchange Board of India Act, 1992 (15 of 1992) the Securities and Exchange Board of India ... control within the meaning of clause (e) of sub-regulation (1) of regulation 2 of the Securities and Exchange Board of India (Substantial Acquisition of Shares and Takeovers) Regulations, 2011; (ii)

Ngày tải lên: 19/02/2014, 09:20

... Four cases of congestionTrang 2324-5 QUALITY OF SERVICE Quality of service (QoS) is an internetworking issue that has been discussed more than defined We can informally define quality of service ... TRAFFICThe main focus of congestion control and quality of service is service is data traffic data traffic In congestion control we try to avoid traffic congestion In quality of service, we try ... INTEGRATED SERVICESTwo models have been designed to provide quality of service in the Internet: Integrated Services and Differentiated Services We discuss the first model here Trang 35Integrated Services

Ngày tải lên: 06/03/2014, 12:20

... most of the prominent intrusion detection schemes availablein the literature The topic of quality of service for ad hoc networks is covered in Chapter6.Supporting appropriate quality of service ... independent 1.5 Quality of serviceAll the vulnerabilities enumerated in Section1.3above are potential sources ofservice impairment in ad hoc networks and hence may degrade the ‘‘quality ofservice’’ ... associated with providing quality of service (QoS) in ad hoc networks It should be pointed out that security and quality of serviceare two distinct attributes that are independent of each other in general

Ngày tải lên: 25/03/2014, 12:07

... actual quality of our services like library resources, writing center, and so on… Trang 10Free Powerpoint Templates• This study is intent to understand: Conception of service quality. Perceived quality ... method that may be used by a services organization to improve service quality  The method involves the development of an understanding of the perceived service needs of target customers Trang 14Free ... perceptions of service quality”  Babar, Z B (2010) “A study examining the students satisfaction in higher education” Trang 33Free Powerpoint Templates Akan, P (1995) "Dimensions of service quality:

Ngày tải lên: 18/04/2014, 16:28

... first part of the frame is related to a contention phase and consists of several pairs of minislots Each minislot is divided into the transmission of an RTS and a CTS signal The second part of the ... start out with a detailed review and discussion of available CLDs for both power control and MUD Eventually, we are concerned with the Quality of Service (QoS) achieved with the different CLDs ... assess and compare the QoS of both schemes by means of exten-sive system simulations in terms of data throughput as well as delay However, we also consider the fairness of both schemes as an additional

Ngày tải lên: 21/06/2014, 03:20

... Trang 1QUALITY OF SERVICE AND RESOURCE ALLOCATION IN WIMAX Edited by Roberto C Hincapie and Javier E Sierra Trang 2Quality of Service and Resource Allocation in ... associated with a service class The IEEE 802.16 standards define five service classes: Unsolicited Grant Service (UGS), extended real-time Polling Service (ertPS), real-time Polling Service (rtPS), ... prepared to present state of the art on WiMAX Technology It has been constructed with the support of many researchers around the world, working on resource allocation, quality of service and WiMAX applications

Ngày tải lên: 21/06/2014, 05:20

... WiMAX A high level of QoS and scheduling support is one of the interesting features of the WiMAX standard These service-provider features are especially valuable because of their ability to ... perform scheduling services, so that the QoS requirements of the connections can be satisfied 3.1 What is QoS? QoS refers to the ability of a network to provide improved service to selected ... the diversified service types, which requires the WiMAX scheduling scheme to be adaptive to the various QoS parameters of different service types There have been some studies of the WiMAX MAC

Ngày tải lên: 21/06/2014, 05:20

... analysis of the network in the limit of large number of users The aim of this approach is to obtain optimal values of the resuse factor that no longer depend on the particular configuration of the ... current level of multicell interference.The result of each iteration is then used to update the value of multicell interference for thenext iteration of the algorithm The convergence of this iterative ... value of Q T=Q T(α)for several values ofα on a grid in the interval[0, 1] In Figure 11,αoptis plotted as function of the average data rate requirement ¯r for the case of a network composed of cells

Ngày tải lên: 21/06/2014, 05:20

... link WiMAX also defines aconcept of a service flow A service flow is a unidirectional flow of packets with a particularset of QoS parameters and is identified by a service flow identifier (SFID) The ... to the cases of a single WiFi RAT and of a single WiMAX RAT Of course, when considering the case of a single WiMAX RAT, the throughput perceived by an user located in the region of interest is ... frequenciesbetween 2 GHz and 11GHz 5 Finally a WirelessMAN SOFDMA (SOFDM Access): OFDMA PHY layer has beenextended in IEEE 802.16e to SOFDMA (scalable OFDMA) where the size is variable andcan take different

Ngày tải lên: 21/06/2014, 05:20

... proportional resource allocation in OFDMA systems, Proceedings of IEEE Signal Processing Systems, 2004 SIPS 2004, pp 1-6, october 2004 Trang 10Part 2 Quality of Service Models and Evaluation Trang ... PMP mode In WiMAX networks, quality of service (QoS) is provided through five different servicesclasses in the MAC layer (Andrews et al., 2007): 1 Unsolicited grant service (UGS) is designed for ... one of the fundamental requirements of next generation OFDMA basedwireless mobile communication systems which consist on the cross-layer scheduling andresource allocation mechanism The purpose of

Ngày tải lên: 21/06/2014, 05:20

... providers With regard to Quality of Service (QoS) control, the WiMAX system provides service differentiation based on the combination of a set of communication service classes supported by both ... end-to-end quality level support for multimedia applications is required to satisfy the growing demands of fixed and mobile users, while increasing the profits of the content providers With regard to Quality ... the service time of an REQ X is equal to Y For the same reason, the service time of an successful REQ X  is equal to Y  Obviously, there is no need to calculate the waiting time in the queue of

Ngày tải lên: 21/06/2014, 05:20

... assuring network service quality but also consider the quality as perceived by the end user Perceived QoS (or Quality of Experience – QoE) is often considered as the “ultimate measure” of system performance ... number of OFDM symbols (/OFDMA slots) Therefore achieved transfer rates of a wireless link can vary significantly over short period of time This adds a “second dimension” to the problem of estimating ... where capacity of a link in terms of a maximum throughput / number of calls is considered constant As a consequence, in such an ACM-enabled system, OFDM symbols (or slots for OFDMA) should be

Ngày tải lên: 21/06/2014, 05:20

... Evaluation criteria for multimedia services, issue 1 [40] Olli Alanen; “Quality of Service for Triple Play Services in Heterogeneous Networks”; p 38-39; University of Jyväskylä 2007; Finland [41] ... evaluation of speech quality (PESQ): An objective method for end-to-end speech quality assessment of narrow-band telephone networks and speech codecs, Telecommunications Standarization Sector of ITU ... “Perceptual evaluation of speech quality (PESQ) : An objective method for end-to-end speech quality assessment of band telephone networks and speech codecs”, University of Rennes, September narrow-2009

Ngày tải lên: 21/06/2014, 05:20

... support joint operation with it. Quality of Service and Resource Allocation in WiMAX 274 One of the drivers of WiMAX’s development is its suitability (because of centralized scheduling using ... telemedicine/e-health services”. Proceedings of the IEEE Wireless Communications and Networking Conference WCNC, Budapest, Hungary, 2009. N. Y. Philip, (2008). "Medical Quality of Service for Optomised ... Assessment of the results of the adaptive protection scheme is presented in terms of packet drops, data corruption and repair, end-to-end delay introduced, and the dependency of objective video quality

Ngày tải lên: 21/06/2014, 05:20

... video and data services at high moving speed while maintaining high data rates Mobile WiMAX is based of OFDMA physical layer of the 802.16e-2005 standard, which is a revision of the fixed WiMAX ... weather conditions, can all affect the Quality of Service (QoS) as seen by the end user The topology is constantly changing and vehicles could move out of sight from one another causing an outage ... allowed for the integration of the various components of the Video VANET OPNET model a VANET model From our survey, Table 2.1 shows a summary of the findings The result of this analysis presents

Ngày tải lên: 21/06/2014, 05:20

... applications Provision of Quality of Service (QoS) is challenging in mobile ad hoc networks because of the dynamic characteristics of mobile networks and the limited resources of the mobile devices ... list of author information is available at the end of the article Abstract The prevalence of multimedia applications has drastically increased the amount of multimedia data With the drop of the ... handoff among differ-ent wireless networks and provide an uninterrupted playback of the video with an acceptable QoS • Routing Because of the movement of the mobile devices, the topology of the

Ngày tải lên: 21/06/2014, 06:20

... Safety and Quality Standards of Fresh Horticultural Products for Domestic and Export Markets Australian Personnel R A Jordan Australian Institution University of Sydney, Faculty of Agriculture ... improving the quality and safety of its products Research and training in postharvest physiology is an essential component of these developments, particularly in the areas of food safety and quality ... completed by participants at the conclusion of each course Assessment of understanding gained and skills developed Follow up evaluation of the usefulness of the short course 6 months after course

Ngày tải lên: 22/06/2014, 13:20