cisco catalyst qos quality of service in campus

... Management 1 Quality of Service in IP Networks CH-1015 Ecublens http://icawww.epfl.ch Prof. Jean-Yves Le Boudec Prof. Andrzej Duda Prof. Patrick Thiran LCA-ISC-I&C, EPFL Queue Management 5 Principles ... flows sending large packets get more l cost of flow classification Queue Management 3 Improving QOS in IP Networks o IETF groups are working on proposals to provide better QOS control in IP networks, ... networks, i.e., going beyond best effort to provide some assurance for QOS o Work in Progress includes Differentiated Services, and Integrated Services (RSVP) o Simple model for sharing and congestion...

Ngày tải lên: 06/04/2013, 11:05

Ngày tải lên: 18/10/2013, 12:15

... 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. ... 107 6.2 Routing in mobile ad hoc networks 110 6.3 Routing with quality of service constraints 112 6.4 Quality of service routing in ad hoc networks 118 6.5 Conclusion and further reading 126 6.6 ... dissolving the resin covering the silicon using fuming acid. The next step involves layout reconstruction using a systema- tic combination of microscopy and invasive removal of covering layers. During layout...

Ngày tải lên: 25/03/2014, 12:07

Ngày tải lên: 22/06/2014, 22:20

Ngày tải lên: 22/06/2014, 22:20

Ngày tải lên: 01/08/2014, 17:21

Ngày tải lên: 04/07/2014, 01:20

... 2000, Cisco Systems, Inc. 3 © 2000, Cisco Systems, Inc. www .cisco. com econ_387_05_010.ppt Campus QoS Campus QoS Campus QoS Issues –Prioritization (Marking and Queuing) © 2000, Cisco Systems, Inc. ... into a priority queue on a WAN link? This ability is a key differentiator in achieving QoS. © 2000, Cisco Systems, Inc. 1 © 2000, Cisco Systems, Inc. Campus Quality of Service © 2000, Cisco ... information about Campus QoS, refer to the following URL: http://wwwin .cisco. com/Mkt/Training/field_training/felc/us/pre_vt /campus/ ht ml/data_0505.htm © 2000, Cisco Systems, Inc. 7 © 2000, Cisco...

Ngày tải lên: 11/12/2013, 14:15

... synthesis table of the main scheduling mechanisms and highlights the main points of each of them. Section 6 does the final consideration of this chapter. 2. WiMAX MAC scheduling and QoS: Issues and ... features of the WiMAX MAC layer and of the WiMAX scheduling classes. The main components of the MAC layer are presented. Then, the key issues and challenges existing in the development of scheduling ... scheduling in the BS and in the SS (Ma, 2009). In the downlink scheduling, the BS has complete knowledge of the queue status and the BS is the only one that transmits during the downlink subframe....

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 ... wireless-based access methods. 3.2 QoS and scheduling in WiMAX A high level of QoS and scheduling support is one of the interesting features of the WiMAX standard. These service- provider features are ... 1998). Satisfying QoS with a Learning Based Scheduling Algorithm, School of Engineering, University of Durham,. [24] M.Taghipoor,G Tavassoli and V.Hosseini(April 2010). Gurantee QoS in WiMAX Networks...

Ngày tải lên: 21/06/2014, 05:20

... OFDMA in a downlink multi-cell scenario, 9th International OFDM Workshop (InOWo). S. Plass, X. G. Doukopoulos & R. Legouable (2006). Investigations on link-level inter-cell interference in ... a further “wider holed” basin is not fully exploited in terms of water flow increase. Reasoning in terms of TCP protocol, in fact, the congestion window moves following the TCP layer acknowledgments ... basin, the water flow splitting modality must be modified in such a way that the water in the two small basins is 136 Quality of Service and Resource Allocation in WiMAX 10 Will-be-set-by -IN- TECH P A =...

Ngày tải lên: 21/06/2014, 05:20

... will be presented in following. 5.1.1 QoS constraints In order to guarantee the quality of service required by these applications, the service provider has to distinguish five service classes. ... determine the burst profile (c n,s , M n,s ) of OFDMA slot s for user n. Todothis,simplydeterminetheSINR n,s corresponding to: SINR n,s = 1 48 8 ∑ f =1 6 ∑ t∈1 SINR n, f (t) (14) 158 Quality of Service ... been defined in the standard. 3. Scheduling In WiMAX, the scheduling mechanism consists of determinating the information element (IE) sent in the UL MAP m essage that indicates the amount of the allocated...

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 ... 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 ... defined in the IEEE 802.16 standard for TDD in PMP mode is shown in Fig. 1. Each frame has a duration of Δ and is divided into uplink and downlink subframes. At the beginning of a downlink subframe,...

Ngày tải lên: 21/06/2014, 05:20

... the profits of the content 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 ... 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, ... to guarantee QoS support for 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...

Ngày tải lên: 21/06/2014, 05:20

... differences in handling QoS in both 4G systems. Even though the underling technologies differ in many aspects, it is important to Quality of Service and Resource Allocation in WiMAX 224 ... 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 ... number of repetitions and for each set of repetitions the number of users in the system increases as specified in Table 4. The number of users was chosen to show the point where the perceived quality...

Ngày tải lên: 21/06/2014, 05:20

... selective quality control of the outgoing video streams, depending on a nature of objects detected or identified within a span. With the WiMAX flexible tools involving adjustment of service parameters ... exploration of reliable and feasible QoS means to support quality- distinctive traffic distribution in the context of versatile telemedicine services. Due to multiple telemedicine scenarios, the involved ... activity targeting QoS- accumulated techniques to maintain a certain level of QoS assurance in healthcare services. (Vergados et. al, 2006) Vergados pushes forward a challenge by proposing (Differentiated...

Ngày tải lên: 21/06/2014, 05:20

... Division Multiplexing (OFDM) as a way of increasing symbol length to guard against multi-path interference. The sub-carriers inherent in OFDM were adapted for multi-user usage by means of Orthogonal ... Allocation in WiMAX 274 One of the drivers of WiMAX’s development is its suitability (because of centralized scheduling using TDD) for video streaming. Video streaming, as a part of Internet ... settings Quality of Service and Resource Allocation in WiMAX 280 generate new symbols that makes Fountain codes rateless. Decoding will succeed with small probability of failure if any of...

Ngày tải lên: 21/06/2014, 05:20

Ngày tải lên: 21/06/2014, 05:20

Ngày tải lên: 21/06/2014, 06:20

Ngày tải lên: 22/06/2014, 22:20