UNC/FORTH Archive of Wireless Traces, Models, and Tools

UNC/FORTH Archive of Wireless Traces, Models, and Tools

maintained by the UNC and FORTH Mobile Computing Groups

Wireless networking environments can be extremely complex and the interaction of different layers and technologies may create situations that cannot be foreseen during the design and testing stages of technology development. It is therefore critical to perform comprehensive empirical studies in a wide range of production environments to uncover deficiencies and identify possible optimizations and extensions. The availability of high-quality measurement and modeling studies would make it possible to develop wireless networks that are more robust, easier to manage and scale, and able to utilize scarce resources more efficiently. As part of our wireless measurements and modelling research, we have created a data repository.

This data repository is the result of a joint effort of the Mobile Computing Groups in the Department of Computer Science at the University of North Carolina (UNC) and the Institute of Computer Science at the Foundation of Research and Technology - Hellas (FORTH) in Crete, Greece. Both UNC and FORTH have state-of-art testbeds for monitoring large scale wireless networks and collecting extensive wireless traces (e.g. syslog, snmp, TCP flow, and signal strength based data). Such traces enable comparative analysis modelling and validation studies on different wireless networking environments. We make these traces, monitoring tools, and models publicly available to the community.

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Examples of the parameters we modeled, with the proposed models, implemented functions (in matlab) and relevant publications are the following:

Parameter	Model	Probability Density Function	Related Papers	Functions
AP Association duration	BiPareto		EW' 06	biPareto
Session arrival	Time-varying Poisson with rate λ(t)	N: # of sessions between t1 and t2	WICON '06
Client arrival	Time-varying Poisson with rate λ(t)	Same as above	LANMAN '05
AP of first association/session	Lognormal		WICON '06
Flow interarrival/session	Lognormal	Same as above	WICON '06
Flow number/session	BiPareto		WICON '06
Flow size	BiPareto	Same as above	WICON '06
Client roaming between APs	Markov-chain		INFOCOM'04
Spatio-temporal phenomena in wireless Web access			INFOCOM'04

Application pattern of wireless users (WOWMOM'07)

Application type	Flows (%)	Bytes (%)	Packets (%)	Clients (%)
NETWORK MANAGEMENT	9.95	0.42	1.54	17
CHAT	2.05	0.48	1.47	73
WEB	35.6	57.59	46.80	99
P2P	30.04	24.85	34.46	43
ON-LINE GAMES	1.11	0.01	0.075	4
FTP	0.91	1.57	1.72	7
MAIL	0.07	0.33	0.21	1.5
ADDRESS SCAN	6.40	0.12	0.58	73
PORTSCAN	0.39	0.32	0.28	1.4
STREAMING	0.10	0.177	0.196	0.5
UNKNOWN	13.2	14.09	12.64	84

Wireless network environments

UNC campus wireless LAN

A brief description of the wireless infrastructure in the UNC campus, with information on the user client population, the number of APs and their type, is given here.

FORTH campus wireless LAN

A brief description of the wireless infrastructure in the FORTH buildings, with information on the user client population, the number of APs and their type, is given here.

SYSLOG traces

UNC SYSLOG data

Syslog traces from the UNC campus wireless network are available for several periods spanning the interval September 2004 - June 2005. The format of the available files and more details for their collection and pre-processing are given .More analytically, available are the following datasets:

Syslog Dataset #1 (September 29, 2004 - November 30, 2004)

o Maria Papadopouli, Haipeng Shen, Manolis Spanakis. Characterizing the duration and association patterns of wireless access in a campus.11th European Wireless Conference 2005, Nicosia, Cyprus, April 10-13, 2005 [PDF, PS, BIBTEX].

o Maria Papadopouli, Haipeng Shen, Manolis Spanakis. Modeling client arrivals at access points in wireless campus-wide networks. 14th IEEE Workshop on Local and Metropolitan Area Networks, Chania, Crete, Greece, September 18-21, 2005. (ranked fourth best paper in the reviewing process) [PDF, PS, BIBTEX, PPT].

· Syslog Dataset #2 (13 - 20 April and 2 - 9 May, 2005)

o M. Papadopouli, M. Moudatsos, M. Karaliopoulos. Modeling roaming in large-scale wireless networks using real measurements. First workshop on advanced EXPerimental activities ON WIRELESS networks and systems, International Symposium on a World of Wireless, Mobile and Multimedia Networks (WoWMoM06), Niagara-Falls/Buffalo, New York, USA, June 26-29, 2006 [PDF,PS,BIBTEX].

Syslog Dataset #3
- Francisco Chinchilla, Mark Lindsey, and Maria Papadopouli. Analysis of wireless information locality and association patterns in a campus. IEEE INFOCOM 2004, Hong Kong, March 7-11, 2004 [PDF,PS,BIBTEX].

SNMP traces

UNC SNMP data

SNMP data collection from the UNC wireless network APs covers the period 2004 - up to now. Details on the pre-processing and formatting of data are given. More analytically, the available SNMP datasets are:

SNMP dataset #1 (September 29, 2004 - June 26, 2005)
- Merkouris Karaliopoulos, Maria Papadopouli, Elias Raftopoulos and Haipeng Shen. On scalable measurement-driven modelling of traffic demand in large WLans. IEEE Workshop on Local and Metropolitan Area Networks, Princeton NJ, USA, June 10-13, 2007 (invited paper) [PDF, BIBTEX, PPT].
- Manolis Ploumidis, Maria Papadopouli, Thomas Karagiannis. Multi-level application-based traffic characterization in a large-scale wireless network. IEEE International Symposium on a World of Wireless, Mobile and Multimedia Networks (WoWMoM), Helsinki, Finland, June 2007[PDF, PS, BIBTEX].
- Maria Papadopouli, Haipeng Shen, Elias Raftopoulos, Manolis Ploumidis, Felix Hernandez-Campos. Short-term traffic forecasting in a campus-wide wireless network. 16th Annual IEEE International Symposium on Personal Indoor and Mobile Radio Communications, Berlin, September 11 - 14, 2005 [PDF,PS, BIBTEX,PPT].
- Felix Hernandez-Campos, Maria Papadopouli. A comparative measurement study of the workload of wireless access points in campus networks. 16th Annual IEEE International Symposium on Personal Indoor and Mobile Radio Communications, Berlin, September 11 - 14, 2005 [PDF,PS,BIBTEX,PPT].
- Maria Papadopouli, Elias Raftopoulos, Haipeng Shen. Evaluation of short-term traffic forecasting algorithms in wireless networks. 2nd Conference on Next Generation Internet Design and Engineering, Valencia, Spain, April 3-5, 2006 [PDF,PS,BIBTEX].

SNMP dataset #2 A second set of SNMP traces covering the remaining period till the end of 2005 will soon be made available

FORTH SNMP data

Measurement data from SNMP pollings of the FORTH wireless infrastructure have been collected since September 2005.

SNMP dataset #1 The first set of SNMP traces covers September, 2005

Packet header traces

UNC data

Flow-level data from the UNC wireless network are available for the week 13 - 20 April, 2005. The details are provided here.

Merkouris Karaliopoulos, Maria Papadopouli, Elias Raftopoulos and Haipeng Shen. On scalable measurement-driven modelling of traffic demand in large WLans. IEEE Workshop on Local and Metropolitan Area Networks, Princeton NJ, USA, June 10-13, 2007 (invited paper)
Manolis Ploumidis, Maria Papadopouli, Thomas Karagiannis. Multi-level application-based traffic characterization in a large-scale wireless network. IEEE International Symposium on a World of Wireless, Mobile and Multimedia Networks (WoWMoM), Helsinki, Finland, June 2007.
Maria Papadopouli, Elias Raftopoulos, Haipeng Shen. Evaluation of short-term traffic forecasting algorithms in wireless networks. 2nd Conference on Next Generation Internet Design and Engineering, Valencia, Spain, April 3-5, 2006 [PDF,PS,BIBTEX].
Felix Campos, Merkourios Karaliopoulos, Maria Papadopouli, Haipeng Shen. Spatio-Temporal Modeling of Traffic Workload in a Campus WLAN. Second annual international Wirless internet Conference ( WICON06 ), Boston, USA, August 2-5, 2006 [PDF, PS, BIBTEX].
Felix Hernandez-Campos, Maria Papadopouli. Assessing The Real Impact of 802.11 WLANs: A Large-Scale Comparison of Wired and Wireless Traffic. 14th IEEE Workshop on Local and Metropolitan Area Networks, Chania, Crete, Greece, September 18-21, 2005. (ranked first best paper in the reviewing process) [PDF,PS,BIBTEX,PPT]

HTTP Request Logs

HTTP requests from the UNC wireless network as a result of TCP packets processing. Available for 6 - 28 February, 2003. The details are provided here.

Francisco Chinchilla, Mark Lindsey, and Maria Papadopouli. Analysis of wireless information locality and association patterns in a campus. IEEE INFOCOM 2004, Hong Kong, March 7-11, 2004 [PDF,PS,BIBTEX].

Signal strength traces

FORTH data

Signal strength values have been acquired from several access points at various positions in FORTH using NetStumbler. More details and the dataset are provided here.

Konstantinos Vandikas, Lito Kriara, Tonia Papakonstantinou, Anastasia Katranidou, Haris Baltzakis and Maria Papadopouli. Empirical-based analysis of a cooperative location-sensing system. First International Conference on Autonomic Computing and Communication Systems (ACM Autonomics'07), Rome, Italy, 28-30 October 2007
Anastasia Katranidou. Location-sensing using the IEEE 802.11 Infrastructure and the Peer-to-peer Paradigm for Mobile Computing Applications. M.Sc. Thesis, Department of Computer Science, University of Crete, Iraklion, February, 2006 [PDF, PPT, BIBTEX, DEMO].

Synthetic traces

Synthetic traces have been produced using the derived models for session arrivals, flow sizes, in-session flow interarrivals, and in-session number of flows. More details and the corresponding datasets are provided here.

Maria Papadopouli and Henning Schulzrinne. Peer-to-Peer Computing for Mobile Networks: Information Discovery and Dissemination. (Chapter 5) [PDF]

Related Events

o Mobility in Wireless Networks - challenges and opportunities, NSF workshop - Rutgers, July 31-Aug 1, 2007

o 3rd International Workshop on Wireless Network Measurement. [WinMee/WiTMeMo'07]

o 2nd International workshop on Wireless Traffic Measurements and Modeling, 5 August 2006, Boston, MA. [WiTMeMo'06]

o The 2nd Annual International Wireless Internet Conference, 2-5 August 2006, Boston, MA. [Wicon'06]

o 1st International workshop on Wireless Traffic Measurements and Modeling, 5-8 June 2005, Seattle, WA. [WiTMemo'05]

Other Wireless Data Repositories

Funding

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