< draft-ietf-ippm-2330-update-02.txt		draft-ietf-ippm-2330-update-03.txt >
	Network Working Group J. Fabini		Network Working Group J. Fabini
	Internet-Draft Vienna University of Technology		Internet-Draft Vienna University of Technology
	Updates: 2330 (if approved) A. Morton		Updates: 2330 (if approved) A. Morton
	Intended status: Informational AT&T Labs		Intended status: Informational AT&T Labs
	Expires: August 11, 2014 February 7, 2014		Expires: September 24, 2014 March 23, 2014
	Advanced Stream and Sampling Framework for IPPM		Advanced Stream and Sampling Framework for IPPM
	draft-ietf-ippm-2330-update-02		draft-ietf-ippm-2330-update-03
	Abstract		Abstract
	To obtain repeatable results in modern networks, test descriptions		To obtain repeatable results in modern networks, test descriptions
	need an expanded stream parameter framework that also augments		need an expanded stream parameter framework that also augments
	aspects specified as Type-P for test packets. This memo proposes to		aspects specified as Type-P for test packets. This memo proposes to
	update the IP Performance Metrics (IPPM) Framework with advanced		update the IP Performance Metrics (IPPM) Framework with advanced
	considerations for measurement methodology and testing. The existing		considerations for measurement methodology and testing. The existing
	framework mostly assumes deterministic connectivity, and that a		framework mostly assumes deterministic connectivity, and that a
	single test stream will represent the characteristics of the path		single test stream will represent the characteristics of the path
	skipping to change at page 1, line 48 ¶		skipping to change at page 1, line 48 ¶
	Internet-Drafts are working documents of the Internet Engineering		Internet-Drafts are working documents of the Internet Engineering
	Task Force (IETF). Note that other groups may also distribute		Task Force (IETF). Note that other groups may also distribute
	working documents as Internet-Drafts. The list of current Internet-		working documents as Internet-Drafts. The list of current Internet-
	Drafts is at http://datatracker.ietf.org/drafts/current/.		Drafts is at http://datatracker.ietf.org/drafts/current/.
	Internet-Drafts are draft documents valid for a maximum of six months		Internet-Drafts are draft documents valid for a maximum of six months
	and may be updated, replaced, or obsoleted by other documents at any		and may be updated, replaced, or obsoleted by other documents at any
	time. It is inappropriate to use Internet-Drafts as reference		time. It is inappropriate to use Internet-Drafts as reference
	material or to cite them other than as "work in progress."		material or to cite them other than as "work in progress."
	This Internet-Draft will expire on August 11, 2014.		This Internet-Draft will expire on September 24, 2014.
	Copyright Notice		Copyright Notice
	Copyright (c) 2014 IETF Trust and the persons identified as the		Copyright (c) 2014 IETF Trust and the persons identified as the
	document authors. All rights reserved.		document authors. All rights reserved.
	This document is subject to BCP 78 and the IETF Trust's Legal		This document is subject to BCP 78 and the IETF Trust's Legal
	Provisions Relating to IETF Documents		Provisions Relating to IETF Documents
	(http://trustee.ietf.org/license-info) in effect on the date of		(http://trustee.ietf.org/license-info) in effect on the date of
	publication of this document. Please review these documents		publication of this document. Please review these documents
	skipping to change at page 2, line 30 ¶		skipping to change at page 2, line 30 ¶
	Table of Contents		Table of Contents
	1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2		1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
	1.1. Definition: Reactive Path Behavior . . . . . . . . . . . 3		1.1. Definition: Reactive Path Behavior . . . . . . . . . . . 3
	2. Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4		2. Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
	3. New or Revised Stream Parameters . . . . . . . . . . . . . . 5		3. New or Revised Stream Parameters . . . . . . . . . . . . . . 5
	3.1. Test Packet Type-P . . . . . . . . . . . . . . . . . . . 6		3.1. Test Packet Type-P . . . . . . . . . . . . . . . . . . . 6
	3.1.1. Multiple Test Packet Lengths . . . . . . . . . . . . 6		3.1.1. Multiple Test Packet Lengths . . . . . . . . . . . . 6
	3.1.2. Test Packet Payload Content Optimization . . . . . . 7		3.1.2. Test Packet Payload Content Optimization . . . . . . 7
	3.2. Packet History . . . . . . . . . . . . . . . . . . . . . 7		3.2. Packet History . . . . . . . . . . . . . . . . . . . . . 7
	3.3. Access Technology Change . . . . . . . . . . . . . . . . 7		3.3. Access Technology Change . . . . . . . . . . . . . . . . 8
	3.4. Time-Slotted Randomness Cancellation . . . . . . . . . . 8		3.4. Time-Slotted Randomness Cancellation . . . . . . . . . . 8
	4. Quality of Metrics and Methodologies . . . . . . . . . . . . 9		4. Quality of Metrics and Methodologies . . . . . . . . . . . . 9
	4.1. Repeatability . . . . . . . . . . . . . . . . . . . . . . 9		4.1. Repeatability . . . . . . . . . . . . . . . . . . . . . . 9
	4.2. Continuity . . . . . . . . . . . . . . . . . . . . . . . 10		4.2. Continuity . . . . . . . . . . . . . . . . . . . . . . . 10
	4.3. Actionable . . . . . . . . . . . . . . . . . . . . . . . 11		4.3. Actionable . . . . . . . . . . . . . . . . . . . . . . . 11
	4.4. Conservative . . . . . . . . . . . . . . . . . . . . . . 11		4.4. Conservative . . . . . . . . . . . . . . . . . . . . . . 12
	4.5. Spatial and Temporal Composition . . . . . . . . . . . . 12		4.5. Spatial and Temporal Composition . . . . . . . . . . . . 12
	4.6. Poisson Sampling . . . . . . . . . . . . . . . . . . . . 12		4.6. Poisson Sampling . . . . . . . . . . . . . . . . . . . . 12
	5. Conclusions . . . . . . . . . . . . . . . . . . . . . . . . . 12		5. Conclusions . . . . . . . . . . . . . . . . . . . . . . . . . 13
	6. Security Considerations . . . . . . . . . . . . . . . . . . . 13		6. Security Considerations . . . . . . . . . . . . . . . . . . . 13
	7. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 13		7. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 13
	8. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 13		8. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 13
	9. References . . . . . . . . . . . . . . . . . . . . . . . . . 13		9. References . . . . . . . . . . . . . . . . . . . . . . . . . 13
	9.1. Normative References . . . . . . . . . . . . . . . . . . 13		9.1. Normative References . . . . . . . . . . . . . . . . . . 13
	9.2. Informative References . . . . . . . . . . . . . . . . . 14		9.2. Informative References . . . . . . . . . . . . . . . . . 14
	Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 15		Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 15
	1. Introduction		1. Introduction
	skipping to change at page 7, line 25 ¶		skipping to change at page 7, line 25 ¶
	use standard plain-text payload.		use standard plain-text payload.
	IPPM-conforming measurements should add packet payload content as a		IPPM-conforming measurements should add packet payload content as a
	Type-P parameter which can help to improve measurement determinism.		Type-P parameter which can help to improve measurement determinism.
	Some packet payloads are more susceptible to compression than others,		Some packet payloads are more susceptible to compression than others,
	but optimizers in the measurement path can be out ruled by using		but optimizers in the measurement path can be out ruled by using
	incompressible packet payload. This payload content could be either		incompressible packet payload. This payload content could be either
	generated by a random device or by using part of a compressed file		generated by a random device or by using part of a compressed file
	(e.g., a part of a ZIP compressed archive).		(e.g., a part of a ZIP compressed archive).
			Optimization can go beyond the scope of one single data- or
			measurement stream. Many more client- or network-centric
			optimization technologies have been proposed or standardized so far,
			including Robust Header Compression (ROHC) and Voice over IP
			aggregation as presented for instance in [EEAW]. The trend towards
			optimization being ubiquitous, many more of these technologies will
			follow. As general observation, the more concurrent flows an
			intermediate host treats and the longer the paths shared by flows
			are, the higher becomes the incentive of hosts to aggregate flows
			belonging to distinct sources. Measurements should consider this
			potential additional source of uncertainty with respect to
			repeatability. Aggregation of flows in networking devices can, for
			instance, result in reciprocal timing and performance influence of
			these flows which may exceed typical reciprocical queueing effects by
			orders of magnitude.
	3.2. Packet History		3.2. Packet History
	Recent packet history and instantaneous data rate influence		Recent packet history and instantaneous data rate influence
	measurement results for reactive links supporting on-demand capacity		measurement results for reactive links supporting on-demand capacity
	allocation. Measurement uncertainty may be reduced by knowledge of		allocation. Measurement uncertainty may be reduced by knowledge of
	measurement packet history and total host load. Additionally, small		measurement packet history and total host load. Additionally, small
	changes in history, e.g., because of lost packets along the path, can		changes in history, e.g., because of lost packets along the path, can
	be the cause of large performance variations.		be the cause of large performance variations.
	For instance, delay in reactive 3G networks like High Speed Packet		For instance, delay in reactive 3G networks like High Speed Packet
	Access (HSPA) depends to a large extent on the test traffic data		Access (HSPA) depends to a large extent on the test traffic data
	rate. The reactive resource allocation strategy in these networks		rate. The reactive resource allocation strategy in these networks
	affects the uplink direction in particular. Small changes in data		affects the uplink direction in particular. Small changes in data
	rate can be the reason of more than 200% increase in delay, depending		rate can be the reason of more than 200% increase in delay, depending
	on the specific packet size.		on the specific packet size. A detailed theoretical and practical
			analysis of RRC link transitions, which can cause such behavior in
			Universal Mobile Terrestrial System (UMTS) networks, is presented,
			e.g., in [RRC].
	3.3. Access Technology Change		3.3. Access Technology Change
	[RFC2330] discussed the scenario of multi-homed hosts. If hosts		[RFC2330] discussed the scenario of multi-homed hosts. If hosts
	become aware of access technology changes (e.g., because of IP		become aware of access technology changes (e.g., because of IP
	address changes or lower layer information) and make this information		address changes or lower layer information) and make this information
	available, measurement methodologies can use this information to		available, measurement methodologies can use this information to
	improve measurement representativeness and relevance.		improve measurement representativeness and relevance.
	However, today's various access network technologies can present the		However, today's various access network technologies can present the
	skipping to change at page 14, line 29 ¶		skipping to change at page 15, line 5 ¶
	[RFC6576] Geib, R., Morton, A., Fardid, R., and A. Steinmitz, "IP		[RFC6576] Geib, R., Morton, A., Fardid, R., and A. Steinmitz, "IP
	Performance Metrics (IPPM) Standard Advancement Testing",		Performance Metrics (IPPM) Standard Advancement Testing",
	BCP 176, RFC 6576, March 2012.		BCP 176, RFC 6576, March 2012.
	[RFC6703] Morton, A., Ramachandran, G., and G. Maguluri, "Reporting		[RFC6703] Morton, A., Ramachandran, G., and G. Maguluri, "Reporting
	IP Network Performance Metrics: Different Points of View",		IP Network Performance Metrics: Different Points of View",
	RFC 6703, August 2012.		RFC 6703, August 2012.
	9.2. Informative References		9.2. Informative References
			[EEAW] Pentikousis, K., Piri, E., Pinola, J., Fitzek, F.,
			Nissilae, T., and I. Harjula, "Empirical Evaluation of
			VoIP Aggregation over a Fixed WiMAX Testbed", Proceedings
			of the 4th International Conference on Testbeds and
			research infrastructures for the development of networks
			and communities (TridentCom '08)
			http://dl.acm.org/citation.cfm?id=1390599, March 2008.
	[IBD] Fabini, J., Karner, W., Wallentin, L., and T. Baumgartner,		[IBD] Fabini, J., Karner, W., Wallentin, L., and T. Baumgartner,
	"The Illusion of Being Deterministic - Application-Level		"The Illusion of Being Deterministic - Application-Level
	Considerations on Delay in 3G HSPA Networks", Lecture		Considerations on Delay in 3G HSPA Networks", Lecture
	Notes in Computer Science, Springer, Volume 5550, 2009, pp		Notes in Computer Science, Springer, Volume 5550, 2009, pp
	301-312 , May 2009.		301-312 , May 2009.
	[IRR] Fabini, J., Wallentin, L., and P. Reichl, "The Importance		[IRR] Fabini, J., Wallentin, L., and P. Reichl, "The Importance
	of Being Really Random: Methodological Aspects of IP-Layer		of Being Really Random: Methodological Aspects of IP-Layer
	2G and 3G Network Delay Assessment", ICC'09 Proceedings of		2G and 3G Network Delay Assessment", ICC'09 Proceedings of
	the 2009 IEEE International Conference on Communications,		the 2009 IEEE International Conference on Communications,
	skipping to change at page 15, line 5 ¶		skipping to change at page 15, line 36 ¶
	Empirical Bulk Transfer Capacity Metrics", RFC 3148, July		Empirical Bulk Transfer Capacity Metrics", RFC 3148, July
	2001.		2001.
	[RFC6808] Ciavattone, L., Geib, R., Morton, A., and M. Wieser, "Test		[RFC6808] Ciavattone, L., Geib, R., Morton, A., and M. Wieser, "Test
	Plan and Results Supporting Advancement of RFC 2679 on the		Plan and Results Supporting Advancement of RFC 2679 on the
	Standards Track", RFC 6808, December 2012.		Standards Track", RFC 6808, December 2012.
	[RFC6985] Morton, A., "IMIX Genome: Specification of Variable Packet		[RFC6985] Morton, A., "IMIX Genome: Specification of Variable Packet
	Sizes for Additional Testing", RFC 6985, July 2013.		Sizes for Additional Testing", RFC 6985, July 2013.
			[RRC] Peraelae, P., Barbuzzi, A., Boggia, G., and K.
			Pentikousis, "Theory and Practice of RRC State Transitions
			in UMTS Networks", IEEE Globecom 2009 Workshops doi:
			10.1109/GLOCOMW.2009.5360763, November 2009.
	[TSRC] Fabini, J. and M. Abmayer, "Delay Measurement Methodology		[TSRC] Fabini, J. and M. Abmayer, "Delay Measurement Methodology
	Revisited: Time-slotted Randomness Cancellation", IEEE		Revisited: Time-slotted Randomness Cancellation", IEEE
	Transactions on Instrumentation and Measurement		Transactions on Instrumentation and Measurement
	doi:10.1109/TIM.2013.2263914, October 2013.		doi:10.1109/TIM.2013.2263914, October 2013.
	Authors' Addresses		Authors' Addresses
	Joachim Fabini		Joachim Fabini
	Vienna University of Technology		Vienna University of Technology
	Gusshausstrasse 25/E389		Gusshausstrasse 25/E389
	Vienna 1040		Vienna 1040
	Austria		Austria
	Phone: +43 1 58801 38813		Phone: +43 1 58801 38813
	Fax: +43 1 58801 38898		Fax: +43 1 58801 38898
	Email: Joachim.Fabini@tuwien.ac.at		Email: Joachim.Fabini@tuwien.ac.at
	URI: http://www.tc.tuwien.ac.at/about-us/staff/joachim-fabini/		URI: http://www.tc.tuwien.ac.at/about-us/staff/joachim-fabini/
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