tunable abw

75 %
25 %
Information about tunable abw
News-Reports

Published on June 19, 2007

Author: Arkwright26

Source: authorstream.com

Towards Tunable Measurement Techniques for Available Bandwidth:  Towards Tunable Measurement Techniques for Available Bandwidth Ningning Hu, Peter Steenkiste Carnegie Mellon University BEst 03 12 / 09 / 2003 Outline:  Outline Our experience IGI andamp; PTR PaSt A taxonomy of current techniques Challenge – tunability IGI & PTR:  IGI andamp; PTR Uniform packet train probing techniques Measure either packet gap (IGI) or probing rate (PTR) Search for the turning point Turning Point – The smallest probing gap (largest probing rate) where it is not increased (decreased) by the background traffic Performance [JSAC Vol. 21, 03] Similar accuracy with Pathload Smaller overhead Paced Start (PaSt):  Paced Start (PaSt) Application of PTR Use PTR to improve TCP startup performance Similar in flavor to TCP NewReno PaSt uses multiple windows of data packet train to search for the turning point (available bandwidth) Performance [ICNP 03] Less packet loss Smaller startup time What We Learned from PaSt:  What We Learned from PaSt Application’s considerations are very important for the measurement technique design Accuracy IGI/PTR sometimes have 30% error, good enough? TCP startup: 50% error can be easily accommodated Overhead TCP startup: overhead is critical IGI/PTR took all effort to reduce the overhead Two-end control Hard to deploy TCP: an two end protocol Think MORE about applications! Outline:  Outline Our experience IGI andamp; PTR PaSt A taxonomy of current techniques Challenge – tunability Taxonomy of Current Techniques:  Taxonomy of Current Techniques Pathload IGI/PTR TOPP pathChirp Spruce Jacob Strauss, Dina Katabi, Frans Kaashoek Manish Jain, Constantios Dovrolis Bob Melander, Mats Bjorkman, Per Gunningberg Cprobe ABwE BFind …… Vinay J. Ribeiro, Rudolf H. Riedi, Richard G. Baraniuk, Jiri Navratil, Les Cottrell Ningning Hu, Peter Steenkiste Taxonomy of Current Techniques:  Taxonomy of Current Techniques The list of techniques here is not a complete list. Outline:  Outline Our experience IGI andamp; PTR PaSt A taxonomy of current techniques Challenge – tunability The Challenges:  The Challenges Two-end control Accuracy vs. overhead Extreme environment Deployment and Application – Tunability Two-End Control:  Two-End Control Single-end control needs echo packets Accurate timestamp for the echo packet is hard to get Extra delay on echo packet due to router R. Govindan and V. Paxon. Estimating router ICMP generation delays. PAM 02 K.G. Anagnostakis, et.al. cing: Measuring network-internal delays using only existing infrastruture. Infocom 03. Return path queueing Tunability #1: Single-end probing Accuracy vs. Overhead:  Accuracy vs. Overhead Accuracy is often a tradeoff with probing overhead Tunability #2: Enable application to configure the tradeoff between accuracy and probing overhead Extreme Environment:  Extreme Environment The environment where the bandwidth measurement assumptions don’t hold Time measurement assumption Available bandwidth determining factors Gigabit network [IMC 03, by Guojun Jin] Timing issues: Interrupt andamp; System call Wireless network Available bandwidth determining factor could be different Tunability #3: Deal with the environment of the future Conclusion:  Conclusion Our experience from IGI/PTR andamp; PaSt Active probing design must consider both accuracy and overhead The tradeoff is closely related with the application requirement Tunability is the key challenge for the deployment of current techniques for available bandwidth measurement Achieve single-end control Understand the tradeoff between accuracy and overhead Solve real system issues

Add a comment

Related presentations

Related pages

Available Bandwidth and TCP Throughput

Towards Tunable Measurement Techniques for Available Bandwidth Ningning Hu, Peter Steenkiste Carnegie Mellon University BEst 03 12 / 09 / 2003 Outline Our ...
Read more

Amazon.com: Latin Percussion M201-ABW LP Matador Wood ...

Amazon.com: Latin Percussion M201-ABW LP Matador Wood Bongos - Almond Brown/Chrome: Musical Instruments
Read more

FREQUENCY-TUNABLE BANDPASS FILTERS WITH CONSTANT ABSOLUTE ...

Progress In Electromagnetics Research Letters, Vol. 33, 131{140, 2012 FREQUENCY-TUNABLE BANDPASS FILTERS WITH CONSTANT ABSOLUTE BANDWIDTH AND IMPROVED
Read more

IEEE Xplore Abstract - Tunable Balanced Bandpass Filter ...

This paper presents tunable balanced bandpass filters with constant fractional bandwidth (FBW) and constant absolute bandwidth (ABW), respectively.
Read more

High-Performance RF-MEMS Tunable Filters

High-Performance RF-MEMS Tunable Filters by Sang-June Park A dissertation submitted in partial fulflllment of the requirements for the degree of
Read more

A tunable bandpass filter with constant absolute bandwidth ...

A miniaturized tunable bandpass filter (BPF) with constant absolute bandwidth (ABW) based on a single ring resonator is presented in this paper.
Read more

A TUNABLE 1.4{2.5GHz BANDPASS FILTER BASED ON SINGLE MODE ...

A TUNABLE 1.4{2.5GHz BANDPASS FILTER BASED ON SINGLE MODE Yanyi Wang*, Feng Wei, ... the 3-dB ABW keeps nearly constant when the
Read more

Tunable 3-pole bandpass filter with constant absolute ...

This paper presents a novel design approach for tunable 3-pole bandpass filter (BPF) with constant bandwidth (ABW) and deep rejection at the desired stopband.
Read more

Tunable Balanced Bandpass Filter With Constant Bandwidth ...

This paper presents tunable balanced bandpass filters with constant fractional bandwidth (FBW) and constant absolute bandwidth (ABW), respectively.
Read more