multimedia quality of service what is it

... Major Aspects of Nanotechnology What is it? •How did it come about? What are the social implications? What does this mean for the future? Definitions • Nano means one billionth ... laser beams Major Aspects of Nanotechnology What is it? •How did it come about? What are the social implications? What does this mean for the future? Positive Effects on Society Above: Nanomachines ... with moleculues between one and one hundred nanometers in diameter Manipulating individual atoms and manufacturing from the bottom up Major Aspects of Nanotechnology What is it? •How did it...

Ngày tải lên: 15/03/2014, 22:13

... more focused set of requirements to its IT team In addition, while the full establishment of a service- oriented architecture can take an extended period of time, an individual service can be built ... structure of data However, one major benefit of setting up a service- oriented architecture is that it doesn’t matter which language or protocol is used Instead, the process can be written to be ... Service- oriented architectures are essentially about giving existing services new functionality How Service- Oriented Architectures Can Benefit a Business When used by businesses, service- oriented architectures...

Ngày tải lên: 16/10/2013, 12:15

... more focused set of requirements to its IT team In addition, while the full establishment of a service- oriented architecture can take an extended period of time, an individual service can be built ... structure of data However, one major benefit of setting up a service- oriented architecture is that it doesn’t matter which language or protocol is used Instead, the process can be written to be ... Service- oriented architectures are essentially about giving existing services new functionality How Service- Oriented Architectures Can Benefit a Business When used by businesses, service- oriented architectures...

Ngày tải lên: 21/12/2013, 06:18

... research Finally, this paper is concluded in Section Mobile Multimedia QoS Provision Architecture The provision of QoS for mobile multimedia applications requires the support of the architectures, protocols, ... fulfill all of these requirements for even the wired media It is thus well-acknowledged that it is even more challenging to meet these requirements for high -quality multimedia transmission over ... context, quality of service, and user’s preference In the mobile multimedia applications, the handover schemes should consider the quality of the received video or perceived QoE after switching...

Ngày tải lên: 21/06/2014, 06:20

Ngày tải lên: 28/08/2016, 13:44

... proportional to the rate of the flow l more packets of that flow, higher probability of choosing one of its packets Queue Management 26 RED Characteristics o Dynamic probability p l p-tmp = max-p ... capacity o PRINCIPLE 4: Need a Call Admission Process; application flow declares its needs, network may block call if it cannot satisfy the needs Queue Management Policing Mechanisms o Three criteria: ... Management 17 Priority Queue o Several queues of different priority l source may mark paquets with priority – eg ToS field of IP o Problem l how to avoid everybody sending high priority packets? Queue...

Ngày tải lên: 06/04/2013, 11:05

... arrives The 140 most popular of these queuing techniques is known as WFQ If you have a Cisco router, it is highly likely that it is using the WFQ algorithm because it is the default for any router ... mechanism Extra signaling is not involved, nor does additional packet header overhead exist Given these benefits, IP Precedence is the QoS mechanism that large-scale networks use most often With Cisco ... Sustained number of bits you can transmit per interval On Frame Relay interfaces, this is the committed burst size contracted with your service provider; the default is the bit rate divided by...

Ngày tải lên: 30/09/2013, 05:20

... thesis discusses the suitability of wireless networks for different mobile services, since the influence of the network on the application-perceived Quality of Service is of great significance when it ... reflects the Quality of Service from the viewpoints of the application and user The focus of the thesis is on the influence of the network on the applicationperceived Quality of Service and thus ... Downlink with packet size of 128 bytes ISP B: GPRS Uplink with packet size of 128 bytes ISP A: UMTS Downlink with packet size of 480 bytes ISP A: UMTS Uplink with packet size of 480 bytes ISP B:...

Ngày tải lên: 18/10/2013, 12:15

... device Attention! A Military English Course for NCOs British Army Infantry Weapons: Reading: Student B SA 80 Rifle The SA 80 is the British Army’s Standard combat rifle is made by Heckler and ... rounds it weighs 4.98 kilograms and is 750 mm long The battle range is 300 metres and the maximum effective range is 600 metres The muzzle velocity is 940m/s and the cyclic rate of fire is from ... courses reconnaissance attacks building shelters The following phase of the course is operations training for peace support operations (PSO) This includes discussions, study of and practising practical...

Ngày tải lên: 25/10/2013, 18:20

... support this  xUnit Refactoring: Improving the Design of Existing Code “Changing a software system in such a way that it does not alter the external behavior of the code yet improves its internal ... invitation to poor quality and an excuse for hacking I think that XP is exciting and will improve the practice of testing in the industry    XP developers are writing unit tests and unit testing tools ... of features that need to be coded Acceptance tests verify the completion of user stories Ideally they are written before coding Should Testers Go Along with This? Some say that XP is an invitation...

Ngày tải lên: 29/10/2013, 06:15

... Simulcast 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 ... Digivance digital RF spectrum transport solution is uniquely suited as the infrastructure of a simulcast network due to the inherent qualities of a digital fiber system These benefits include: ... of network blocking of incoming call attempts Typical wireless network designs in the United States provision channels to provide voice services at a GOS of approximately percent, with data services...

Ngày tải lên: 10/12/2013, 19:15

... classes of service • ISL QoS is: – Cisco specification – Focuses on support for QoS over ISL trunks – Supports classes of service Keep All Graphics Inside This Box © 2000, Cisco Systems, Inc www.cisco.com ... briefly Copyright © 2000, Cisco Systems, Inc 29 What Is ATM CLP? Cell Loss Priority (CLP) is a bit in the ATM header of a cell: • CLP Setting 0—higher priority • CLP Setting 1—discarded first Major ... econ_0386_09_010 pt p Quality of Service Classification and Marking © 2000, Cisco Systems, Inc Copyright © 2000, Cisco Systems, Inc www.cisco.com econ_0386_09_001 pt p Objectives Upon completion of this module...

Ngày tải lên: 11/12/2013, 14:15

... completion of this module, you will be able to perform the following tasks: • Explain the significance of Quality of Service (QoS) • Describe new Quality of Service (QoS) features in Cisco IOS ... Graphics Inside This Box © 2000, Cisco Systems, Inc www.cisco.com Econ_0385_02_010 pt p The purpose of this module is to quickly survey the new Quality of Service (QoS) features in Cisco IOS 12.1 ... bandwidth is consumed If it discovers that the configured amount of bandwidth is exceeded, IP RTP Priority drops packets • Higher quality voice over slow speed links—IP RTP Priority is the only...

Ngày tải lên: 11/12/2013, 14:15

... Precedence • Define Differential Service Code Point © 2000, Cisco Systems, Inc www.cisco com econ_387_05_010 pt p The objective of this module is to define the quality of service (QoS) tools which must ... using the bits in the 802.1p field (referred to as class of service or CoS), which is part of the 802.1Q tag • At Layer using the bits of DSCP field in the type of service (ToS) byte of the IP ... delay priority With WRR, each queue is given a weight This weight is used when congestion occurs on the port to give weighted priority to high-priority traffic without starving low priority traffic...

Ngày tải lên: 11/12/2013, 14:15

... Four cases of congestion 24.22 24-5 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 ... 24-1 DATA TRAFFIC The main focus of congestion control and quality of service is data traffic In congestion control we try to avoid traffic congestion In quality of service, we try to create an appropriate ... INTEGRATED SERVICES Two models have been designed to provide quality of service in the Internet: Integrated Services and Differentiated Services We discuss the first model here Topics discussed in this...

Ngày tải lên: 06/03/2014, 12:20

... Further 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 ... the literature The topic of quality of service for ad hoc networks is covered in Chapter Supporting appropriate quality of service for mobile ad hoc networks is a complex and difficult issue ... associated 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...

Ngày tải lên: 25/03/2014, 12:07

... of the relationship between genes and quality of life, both genetic and quality- of- life research is hindered by a mono-disciplinary approach Few genetic researchers are working with quality- of- life ... analysis, causal indicators and quality of life Quality of Life Research 1997, 6:139-150 Fayers PM, Hand DJ, Bjordal K, Groenvold M: Causal indicators in quality of life research Quality of Life ... and Quality of Life Outcomes 2008, 6:89 areas of research insofar as they support a state (i.e., environmental) and trait (i.e., genetic) conceptualization of quality of life and to start discussing...

Ngày tải lên: 18/06/2014, 19:20

... reading glasses to a visit The choice of administration format is made at every visit Theoretically, the administration format may change from visit to visit although this is rarely the case The ... Overall, 83.0% of participants received HAART at enrollment Administration formats The majority of visits involved self-administered PRO questionnaires (70% of a total of 23,420 study visits) Of the ... and Quality of Life Outcomes 2011, 9:30 http://www.hqlo.com/content/9/1/30 Page of 11 80 Self-administration with standard print 60 Percentage of visits 40 20 Interviewer-administration with...

Ngày tải lên: 20/06/2014, 15:20

... frame that is depicted in Figure The 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 ... Progressive Backoff Algorithm; PHY: physical layer; QoS: quality of service; SINR: signal-tointerference-and-noise-ratio Author details Institute of Communication Networks, Technische Universität München, ... length The authors of [24] exactly address this issue and assume for their algorithm as a prerequisite that the neighbor density is limited such that channel estimation and decoding is possible They...

Ngày tải lên: 21/06/2014, 03:20

... the deficit counter DC_i the head of the queue (Q_i) is dequeued and the value of the (DC_i) is decremented by L_i The algorithm is flexible enough as it allows provision of quantum of different ... aspect of heterogeneous algorithms is the allocation of bandwidth among the traffic classes of WiMAX Some of the algorithms in this category also address the issue of variable channel conditions ... algorithms It is used the strict priority mechanism for overall bandwidth allocation The EDF scheduling algorithm is used for SSs of ertPS and rtPS classes The WFQ algorithm is used for SSs of...

Ngày tải lên: 21/06/2014, 05:20