Filters








1,968 Hits in 7.1 sec

Priority Queueing Applied to Expedited Forwarding: A Measurement-Based Analysis [chapter]

Tiziana Ferrari, Giovanni Pau, Carla Raffaelli
2000 Lecture Notes in Computer Science  
The priority queueing mechanism is analysed to verify its effectiveness when applied for the support of Expedited Forwarding-based services in the Differentiated Services environment.  ...  An experimental measurement-based methodology is adopted to outline its properties and end-to-end performance when supported in real transmission devices.  ...  For simplicity we restrict our analysis to a scenario based on only two perhop behaviours: the Expedited Forwarding PHB (EF) and the Best-Effort PHB (BE).  ... 
doi:10.1007/3-540-39939-9_14 fatcat:kojpeiwk2resfedri2nhmfwvna

Assured Forwarding in multi-hop wireless networks

Sungwon Han, Euiyul Ko, Ikjun Yeom
2008 2008 5th IEEE International Conference on Mobile Ad Hoc and Sensor Systems  
In the wired Internet, the AF service is implemented as a queue management scheme associated with a drop policy in each router.  ...  The Assured Forwarding (AF) service in a differentiated services network offers different levels of forwarding assurance for IP packets.  ...  Here, the level of congestion in a link is mostly measured by the queue length.  ... 
doi:10.1109/mahss.2008.4660011 dblp:conf/mass/HanKY08 fatcat:cgl4y5kg7vgzvg265324zekrvq

Delay jitter bounds and packet scale rate guarantee for expedited forwarding

J.C.R. Bennett, K. Benson, A. Charny, W.F. Courtney, J.-Y. Le Boudec
2002 IEEE/ACM Transactions on Networking  
We consider the definition of the Expedited Forwarding Per-Hop Behaviour (EF PHB) as given in RFC 2598 [1] , and its impact on worst case end-to-end delay jitter.  ...  On the other hand, we find that the worst case delay jitter can be made arbitrarily large, while each flow traverses at most a specified number of hops, if we allow networks to become arbitrarily large  ...  FIFO or single high-weight queue in a Class-Based Fair Queuing scheduler.  ... 
doi:10.1109/tnet.2002.801404 fatcat:caln7t4rkvdcfh5vxtj36pz3iy

Robust design of communication systems: The case of expedited forwarding of voice traffic in differentiated services networks

Hyoup-Sang Yoon, Bong-Jin Yum
2007 International Journal of Communication Systems  
Then, the Taguchi robust design methodology is applied for optimizing the Expedited Forwarding (EF) of voice traffic in a Differentiated Services network, and its step-by-step procedures are described  ...  The analysis results show that "type of queue scheduling schemes" is a major control factor for ensuring robust behaviors of one-way delay and jitter while "EF queue size" is for throughput and loss rate  ...  More specifically, the Taguchi robust design methodology [1, 2] is applied for optimizing the Expedited Forwarding (EF) of voice traffic in a Differentiated Services (DS) network, and its step-by-step  ... 
doi:10.1002/dac.866 fatcat:rs3uonkazjbktmnucxy7erioiu

Influence of real-time queue capacity on system contents in DiffServ's expedited forwarding per-hop-behavior

Thomas Demoor, Joris Walraevens, Dieter Fiems, Stijn Vuyst, Herwig Bruneel
2010 Journal of Industrial and Management Optimization  
This paper studies a single-server non-preemptive priority queue with two traffic classes in order to model Expedited Forwarding Per-Hop Behavior in the Differentiated Services (DiffServ) architecture.  ...  Generally, queueing models assume infinite queue capacity but in a DiffServ router the capacity for high priority traffic is typically small to prevent this traffic from monopolizing the output link and  ...  A two-class non-preemptive priority queue with finite capacity for high-priority packets has been studied in order to model a DiffServ router with Expedited Forwarding Per-Hop Behavior for high-priority  ... 
doi:10.3934/jimo.2010.6.587 fatcat:5wk342ncofgu5nld4aewkrgix4

Schedulability analysis of flows scheduled with FIFO: application to the expedited forwarding class

S. Martin, P. Minet
2006 Proceedings 20th IEEE International Parallel & Distributed Processing Symposium  
Finally, we show how to apply these results to the EF (Expedited Forwarding) class in a DiffServ (Differentiated Services) architecture. 1 For that purpose, we can use source routing or mpls.  ...  The FIFO scheduling is the simplest one to implement and very used. We first establish a bound on the worst case end-to-end response time of any flow in the network, using the trajectory approach.  ...  These results can be applied in a DiffServ (Differentiated Services) architecture to determine the worst case end-to-end response time granted to flows belonging to the ef (Expedited Forwarding) class,  ... 
doi:10.1109/ipdps.2006.1639424 dblp:conf/ipps/MartinM06 fatcat:cucrtrpqrrfrvifain2hxccdz4

Transport of TCP/IP traffic over assured forwarding IP-differentiated services

P. Giocomazzi, L. Musumeci, G. Verticale
2003 IEEE Network  
The Internet is currently facing a twofold challenge: to increase network capacity in order to accommodate a steadily increasing number of users and to guarantee the Quality of Service for existing applications  ...  In order to meet these requirements, the Internet Engineering Task Force is currently defining the Differentiated Service architecture, which should offer a simple and scalable platform to guarantee differentiated  ...  In a RIO router, all packets forwarded to the same output line are buffered in a single queue.  ... 
doi:10.1109/mnet.2003.1233914 fatcat:4puscubybvfntmshrgtgooeniu

Capacity Planning of DiffServ Networks with Best-Effort and Expedited Forwarding Traffic

Kehang Wu, Douglas S. Reeves
2004 Telecommunications Systems  
In this paper, we address the problem of capacity planning for DiffServ networks with only Expedited Forwarding (EF) and best effort (BE) traffic classes.  ...  For networks providing a specific level of service guarantees, capacity planning is an imperative part of network management.  ...  Therefore, when we speak of O-D pairs, we are referring to the traffic between pairs of edge routers, not between individual hosts.  ... 
doi:10.1023/b:tels.0000014781.92903.7f fatcat:wv5lxqbsynchjbowsst2cjlb6i

Performance Analysis of DiffServ based Quality of Service in a Multimedia Wired Network and VPN effect using OPNET [article]

Muhammad Aamir, Mustafa Zaidi, Husnain Mansoor
2012 arXiv   pre-print
This paper highlights QoS analysis in a wired IP network with more realistic enterprise modeling and presents simulation results of a few statistics not presented and discussed before.  ...  Quality of Service (QoS) techniques are applied in IP networks to utilize available network resources in the most efficient manner to minimize delays and delay variations (jitters) in network traffic having  ...  In this analysis, the network model with applied Quality of Service is extended to include Internet-based communication.  ... 
arXiv:1206.5469v1 fatcat:kb7xs2f3kjbedgdgcelmbaxp7e

Flow-Based Admission Control Algorithm in the DiffServ-Aware ATM-Based MPLS Network

Gyu Myoung Lee Lee, Jun Kyun Choi Choi, Mun Kee Choi Choi, Man Seop Lee Lee, Sang-Gug Jong Jong
2002 ETRI Journal  
We validate the proposed method by numerical analysis of its performance in such areas as throughput, end-to-end delay and path utilization.  ...  The numerical results of the proposed algorithm achieve reliable delay-bounded Quality of Service (QoS) performance and reduce the blocking probability of high priority service in the DiffServ model.  ...  The integrated packet scheduler is realized by applying a Priority Queuing (PQ) algorithm and an admission control function.  ... 
doi:10.4218/etrij.02.0102.0105 fatcat:foihngtjcffihh4mvmzm6eubme

Predicting Queueing Delays in Delay Tolerant Networks with Application in Space [chapter]

Nikolaos Bezirgiannidis, Vassilis Tsaoussidis
2014 Lecture Notes in Computer Science  
We examine a generic scenario and propose a sampling procedure that extracts measurements of queueing rates and queue lengths.  ...  In this paper we present a study of queueing delays experienced in Delay Tolerant Networks with topology based on deterministic contact plan schedules.  ...  Queueing Rate Measurements and Dissemination In order to study the queue length and all queueing rates through time, we apply a sampling process in a per-contact granularity.  ... 
doi:10.1007/978-3-319-13174-0_18 fatcat:fool75pffnhbpfdb2rharyctma

Expelling Policy Based Buffer Control During Congestion In Differentiated Service Routers

Kumar Padmanabh, Rajarshi Roy
2008 Zenodo  
We present two types of policies to achieve QoS goals for packets with different priorities: the push out scheme and the expelling scheme.  ...  For this work the scenario of packets of variable length is considered with two space priorities and main goal is to minimize the total weighted packet loss.  ...  RFC 2598 (An Expedited Forwarding PHB, June 1999) describes an expedited forwarding (EF) PHB that can be used to build a low-loss, low-latency, low-jitter, assuredbandwidth, end-to-end service through  ... 
doi:10.5281/zenodo.1078926 fatcat:x7zzl6hc35azjh3vpqtq5dmkve

Fairness Evaluation of a DSCP Based SchedulingAlgorithm for Real-Time Traffic in Differentiated ServiceNetworks

Sabyasachi Mukherjee
2013 International Journal of Information and Electronics Engineering  
It is a very vital factor to allocate the resources for improving the QoS (Quality of service) for any network carrying various types of traffic.  ...  The function of the core router of the network is to forward packets as per the per-hop behavior associated with the DSCP (Differentiated services code point) value.  ...  Hence we assigned video traffic the highest priority by giving the per-hop-behavior as expedited forwarding.  ... 
doi:10.7763/ijiee.2013.v3.349 fatcat:lufpeyl355bh5msxe6nipwmfam

End-to-end performance analysis with traffic aggregation

Tiziana Ferrari
2000 Computer Networks  
Two different scheduling algorithms are considered: Priority Queuing and Weighted Fair Queuing. 1  ...  The provisioning of end-to-end services in presence of traffic aggregation is evaluated in the framework of the Differentiated Services QoS architecture.  ...  Special acknowledgements go to Jordi Mongay, Hamad el Allali and Andrea Chierici for their collaboration during the test phase.  ... 
doi:10.1016/s1389-1286(00)00161-4 fatcat:rjy376cs7nb6ngv3jzxsrvmqbm

QoS Support in ARINC 664 P8 Data Networks: ATN Applications Over TCP/IP Ground-to-Ground Subnetworks

Haowei Bai, Mohammed Atiquzzaman, William Ivancic
2006 Journal of Aerospace Computing Information and Communication  
The objective of this paper is to investigate the possibility and conduct a proof-of-concept evaluation of providing QoS to ATN applications over the DiffServ network in the next generation Internet.  ...  Our results show that the QoS requirements of ATN applications for ground-to-ground communications can be successfully satisfied when ATN is run over a DiffServ backbone.  ...  Expedited Forwarding Expedited forwarding (EF), also described as Premium Service, provides a low loss, low latency, low jitter, assured bandwidth, end-to-end service for customers. 13 Loss, latency  ... 
doi:10.2514/1.18661 fatcat:wsj7aqmrtbb4tjqpyqymzuttrq
« Previous Showing results 1 — 15 out of 1,968 results