Dr. Mohamed Watfa, Associate Professor

 List of Publications and Tools Related to Sensor Networks

A – Hardware, Architecture, Physical Layer, MAC Layer, Energy Study

1.        A Probabilist Approach to Predict the Energy Consumption in Wireless Sensor Networks
Raquel A. F. Mini, Badri Nath, Antonio A. F. Loureiro
IV Workshop de Comunicação sem Fio e Computação Móvel, São Paulo, Brazil, October 23-25 2002 (to appear).
 (http://www.cs.rutgers.edu/~mini/wcsf.ps)

2.        A transmission control scheme for media access in sensor networks
Alec Woo and David E. Culler
The seventh annual international conference on Mobile computing and networking 2001
July 16 - 21, 2001, Rome Italy. Pages 221-235
(http://www.acm.org/pubs/citations/proceedings/comm/381677/p221-woo/)

3.        An Energy-Efficient Mac protocol for Wireless Sensor Networks
Wei Ye and John Heidemann and Deborah Estrin

(http://citeseer.nj.nec.com/461814.html)

4.       Algorithmic Transforms for Efficient Energy Scalable Computation
A. Sinha, A. Wang, A. P. Chandrakasan
Proceedings of the International Symposium on Low Power Electronics and Design (ISLPED), 2000.
(http://citeseer.nj.nec.com/sinha00algorithmic.html)

5.       Application-Specific Protocol Architectures for Wireless Networks
Wendi Beth Heinzelman
Ph.D. thesis, Massachusetts Institute of Technology, 2000
(
http://citeseer.nj.nec.com/heinzelman00applicationspecific.html)

6.       Design Considerations for Distributed Microsensor Systems
Anantha Chandrakasan, Rajeevan Amirtharajah, SeongHwan Cho, James Goodman, Gangadhar Konduri, Joanna Kulik, Wendi Rabiner, Alice Wang

(http://citeseer.nj.nec.com/chandrakasan99design.html)

7.        Dynamic Power Management in Wireless Sensor Networks
Amit Sinha and Anantha Chandrakasan
IEEE Design & Test of Computers, Vol. 18, No. 2, March-April 2001
(http://computer.org/dt/dt2001/d2062abs.htm)

8.        Emerging Challenges: Mobile Networking for "Smart Dust"
Joseph M. Kahn, Randy Howard Katz, and Kristofer S. J. Pister
(http://citeseer.nj.nec.com/375904.html)

9.        Energy Complexity: A Metric for Energy Consumption of Ad Hoc Network Protocols
Rajesh Bhairampally
(
http://www.utdallas.edu/~rajesh/resume/mobihoc02.pdf)

10.     Instrumenting the World with Wireless Sensor Networks
D. Estrin, L. Girod, G. Pottie, M. Srivastava
International Conference on Acoustics, Speech, and Signal Processing (ICASSP 2001), Salt Lake City, Utah, May 2001
(http://www.isi.edu/scadds/papers/ICASSP-2001.ps)

11.   Low Power Systems for Wireless Microsensors
K. Bult, A. Burstein, D. Chang, M. Dong, M. Fielding, E. Kruglick, J. Ho, F. Lin, T.H. Lin, W.J. Kaiser, H. Marcy, R. Mukai, P. Nelson, F. Newberg, K.S.J. Pister, G. Pottie, H. Sanchez, O.M. Stafsudd, K.B. Tan, C.M. Ward, S. Xue, J. Yao.
Proceedings of the 1996 International Symposium on Low Power Electronics and Design. Monterey, CA, USA, 12-14 Aug. 1996, pp. 17-22.  (http://www.janet.ucla.edu/WINS/download_publications/islped96.pdf)

12.     Low-Power Wireless Sensor Networks
Rex Min, Manish Bhardwaj, Seong-Hwan Cho, Eugene Shih, Amit Sinha, Alice Wang, Anantha Chandrakasan

(http://citeseer.nj.nec.com/433120.html)

13.     Measuring and reducing energy consumption of network interfaces in hand-held devices
M. Stemm and R. H. Katz
IEICE Transactions on Communications, vol.E80-B, no.8, p. 1125-31, 1997
(http://citeseer.nj.nec.com/stemm97measuring.html)

14.     Next century challenges: Mobile networking for 'smart dust'
J.M. Kahn, R.H. Katz, K.S.J. Pister,
Proc. MOBICOM, 1999, Seattle, 271-278
(http://citeseer.nj.nec.com/kahn99next.html)

15.     Physical layer driven protocol and algorithm design for energy-efficient wireless sensor networks
Eugene Shih, Seong-Hwan Cho, Nathan Ickes, Rex Min, Amit Sinha, Alice Wang and Anantha Chandrakasan
The seventh annual international conference on Mobile computing and networking 2001
July 16 - 21, 2001, Rome Italy. Pages 272 - 287
(http://www.acm.org/pubs/citations/proceedings/comm/381677/p272-shih/)

16.     Power-Aware Systems
Manish Bhardwaj, Rex Min and Anantha Chandrakasan
(http://www-mtl.mit.edu/research/icsystems/uamps/pubs/manishb_asilomar00.pdf)

17.     PicoRadio Supports Ad Hoc Ultra-Low Power Wireless Networking
J
an M. Rabaey, M. Josie Ammer, Julio L. da Silva Jr., Danny Patel. and Shad Roundy
IEEE Computer, Vol. 33, No. 7, July 2000
(http://www.computer.org/computer/co2000/r7042abs.htm)

18.     Prediction-based Monitoring in Sensor Networks: Taking Lessons from MPEG
Samir Goel and Tomasz Imielinski,
Technical Report DCS-TR-438, Department of Computer Science, Rutgers University, June 2001. Submitted for Publication
(http://paul.rutgers.edu/~gsamir/#publications)

19.     Protocols for self-organization of a wireless sensor network
K. Sohrabi, J. Gao, V. Ailawadhi, G.J. Pottie.
IEEE Personal Communications, vol. 7, no. 5, pp. 16-27, Oct. 2000.
(http://www.ee.ucla.edu/faculty/profpapers/pottie_IEEE-pers-comm_oct00.pdf)

20.     Sensor Information Networking Architecture
Chavalit Srisathapornphat, Chaiporn Jaikaeo and Chien-Chung Shen
Proceedings of the 2000 International Workshop on Parallel Processing
Copyright (c) 2000 Institute of Electrical and Electronics Engineers, Inc. All rights reserved.
(http://www.computer.org/proceedings/icpp/0771/07710023abs.htm)

21.     System architecture directions for networked sensors
J. Hill, R. Szewczyk, A. Woo, S. Hollar, D. Culler, K. Pister
Copyright 2000 ACM
(http://citeseer.nj.nec.com/382595.html)

22.     Upper Bounds on the Lifetime of Sensor Networks
Manish Bhardwaj Timothy
(http://citeseer.nj.nec.com/429731.html)

23.     Wireless Integrated Network Sensors
G.J. Pottie, W.J. Kaiser
Communications of the ACM, vol. 43, no. 5, pp. 551-8, May 2000.
(http://www.acm.org/pubs/citations/journals/cacm/2000-43-5/p51-pottie/)

24.     Wireless integrated network sensors: Low power systems on a chip
G. Asada, M. Dong, T. S. Lin, F. Newberg, G. Pottie, W. J. Kaiser
European Solid State Circuits Conference, The Hague, Netherlands, 1998, October.
(http://citeseer.nj.nec.com/278712.html)

 

B – Network Layer

B.1 – Addressing Mechanisms

25.     An Address-Free Architecture for Dynamic Sensor Networks
Jeremy Elson, Deborah Estrin
(http://citeseer.nj.nec.com/elson00addressfree.html)

26.     Random, Ephemeral Transaction Identifiers in Dynamic Sensor Networks
Jeremy Elson and Deborah Estrin
T
o appear in Proceedings of the 21st International Conference on Distributed Computing Systems (ICDCS-21) April 16-19, 2001, Phoenix, Arizona, USA.
A
lso published as UCLA CS Technical Report 200027
(http://www.circlemud.org/~jelson/writings/retri/)

 

B.2 – Routing

27.   Adaptive protocols for information dissemination in wireless sensor networks
Wendi Rabiner Heinzelman, Joanna Kulik and Hari Balakrishnan
Proceedings of the fifth annual ACM/IEEE international conference on Mobile computing and networking. Pages 174-185
August 15 - 19, 1999, Seattle, WA USA
(http://www.acm.org/pubs/citations/proceedings/comm/313451/p174-heinzelman/)

28.   Building Efficient Wireless Sensor Networks with Low-Level Naming
John Heidemann, Fabio Silva, Chalermek Intanagonwiwat, Ramesh Govindan, Deborah Estrin, and Deepak Ganesan.
In Proceedings of the Symposium on Operating Systems Principles, pp. 146-159. Chateau Lake Louise, Banff, Alberta, Canada, ACM. October, 2001.
(http://citeseer.nj.nec.com/456986.html)

29.   Data-centric storage in Sensornets
Sylvia Ratnasamy, Deborah Estrin, Ramesh Govindan, Brad Karp, Scott Shenker, Li Yin, Fang Yu
Submitted for review. February 1st, 2002

(
http://lecs.cs.ucla.edu/~estrin/papers/dht.pdf)

30.     Data Gathering in Sensor Networks using the Energy Delay Metric
Stephanie Lindsey, Cauligi Raghavendra e Krishna Sivalingam
In International Workshop on Parallel and Distributed Computing Issues in Wireless Networks and Mobile Computing, (San Francisco, CA), Apr. 2001
(http://www.eecs.wsu.edu/~dawn/Papers/2001/e_d_final.pdf)

31.     Directed diffusion: a scalable and robust communication paradigm for sensor networks
Chalermek Intanagonwiwat, Ramesh Govindan and Deborah Estrin
Proceedings of the sixth annual international conference on Mobile computing and networking.  Pages 56-67
August 6 - 11, 2000, Boston, MA USA
(http://www.acm.org/pubs/citations/proceedings/comm/345910/p56-intanagonwiwat/)

32.   Energy-Efficient Communication Protocol for Wireless Microsensor Networks
W. Heinzelman and A. Chandrakasan and H. Balakrishnan
In Proccedings of the Hawaii Conference on System Sciences, January 2000
(http://dlib.computer.org/conferen/hicss/0493/pdf/04938020.pdf)

33.   Geographical and Energy Aware Routing: A Recursive Data Dissemination Protocol for Wireless Sensor Networks
Yan Yu, Ramesh Govindan and Deborah Estrin
UCLA Computer Science Department Technical Report UCLA/CSD-TR-01-0023, May 2001
(http://citeseer.nj.nec.com/461988.html)

34.   Impact of Network Density on Data Aggregation in Wireless Sensor Networks
Calermek Intanagonwiwat, Deborah Estrin, Ramesh Govindan, and John Heidemann
Technical Report 01-750, University of Southern California Computer Science Department, November, 2001
(http://citeseer.nj.nec.com/460600.html)

35.     Negotiation-based Protocols for Disseminating Information in Wireless Sensor Networks
Joanna Kulik, Wendi Rabiner Heinzelman, and Hari Balakrishnan
ACM/IEEE Int. Conf. on Mobile Computing and Networking, Seattle, WA, Aug. 1999
(http://citeseer.nj.nec.com/335631.html)

36.     Next century challenges: scalable coordination in sensor networks
Deborah Estrin, Ramesh Govindan, John Heidemann and Satish Kumar
Proceedings of the fifth annual ACM/IEEE international conference on Mobile computing and networking.     Pages 263-270
August 15 - 19, 1999, Seattle, WA USA
(http://www.acm.org/pubs/citations/proceedings/comm/313451/p263-estrin/)

37.     Rumor Routing Algorithm For Sensor Networks
David Braginsky and Deborah Estrin
Under submission to International Conference on Distributed Computing Systems (ICDCS-22), November 2001.
(http://citeseer.nj.nec.com/462331.html)

38.     Service Differentiation in Sensor Networks
Sudeept Bhatnagar, Budhaditya Deb and Badri Nath
To appear in the Fourth International Symposium on Wireless Personal Multimedia Communications, September 2001.(.ps)
(http://paul.rutgers.edu/~sbhatnag/publications.html)

 

C – Distributed Algorithms

C.1 – Topology Discovery

39.     A Topology Discovery Algorithm for Sensor Networks with Applications to Network Management
Budhaditya Deb, Sudeept Bhatnagar and Badri Nath
Department of Computer Science, Rutgers University, Technical Report, DCS-TR-441 (.pdf).
(http://paul.rutgers.edu/~sbhatnag/publications.html)

40.     Ascent: Adaptive Self-Configuring sEnsor Network Topologies
Alberto Cerpa and Deborah Estrin
UCLA Computer Science Department Technical Report UCLA/CSD-TR 01-0009, May 2001.
(http://lecs.cs.ucla.edu/~estrin/papers/Ascent-UCLA-tech-report.ps)

 

C.2 – Location Mechanisms

41.     Ad hoc Positioning System (APS)
Dragos Niculescu and Badrinath
Submitted to GLOBECOM 2001
(http://www.cs.rutgers.edu/~dnicules/research/aps/aps_globecom.pdf)

42.     Adaptive Beacon Placement
Nirupama Bulusu, John Heidemann, and Deborah Estrin
In Proceedings of the 21st International Conference on Distributed Computing Systems (ICDCS-21),
pages 489--498, Phoenix, Arizona, USA, April 2001
(http://citeseer.nj.nec.com/bulusu01adaptive.html)

43.     Convex Position Estimation in Wireless Sensor Networks
Lance Doherty, Kristofer SJ Pister, Laurent El Ghaoui
Dept. of Electrical Engineering and Computer
Proc. of IEEE Infocom 2001.
(http://www.eecs.berkeley.edu/~elghaoui/pdffiles/Infocom.pdf)

44.     Dynamic fine-grained localization in Ad-Hoc networks of sensors
Andreas Savvides, Chih-Chieh Han and Mani B. Strivastava
The seventh annual international conference on Mobile computing and networking 2001. July 16 - 21, 2001, Rome Italy
Pages 166-179
(http://www.acm.org/pubs/citations/proceedings/comm/381677/p166-savvides/)

45.     GPS-less Low Cost Outdoor Localization For Very Small Devices
Nirupama Bulusu, John Heidemann, and Deborah Estrin
IEEE Personal Communications Magazine, 7 (5 ), pp. 28-34, October, 2000.
(http://www.isi.edu/~johnh/PAPERS/Bulusu00a.html)

46.     Scalable Coordination for wireless sensor networks: Self-Configuring Localization Systems
Nirupama Bulusu, Deborah Estrin, Lewis Girod and John Heidemann
International Symposium on Communication Theory and Applications (ISCTA 2001), Ambleside, Lake District, UK, July 2001.  (http://www.isi.edu/scadds/papers/iscta-2001.ps)

 

C.3 – Time Synchronization

47.     Time Synchronization for Wireless Sensor Networks
Jeremy Elson and Deborah Estrin
To appear in Proceedings of the 2001 International Parallel and Distributed Processing Symposium (IPDPS), Workshop on Parallel and Distributed
Computing Issues in   Wireless Networks and Mobile Computing.
(http://www.circlemud.org/~jelson/writings/timesync/)

 

C.4 – Others

48.   Exposure In Wireless Ad-Hoc Sensor Networks
Seapahn Meguerdichian, Farinaz Koushanfar, Gang Qu and Miodrag Potkonjak
The seventh annual international conference on Mobile computing and networking 2001
July 16 - 21, 2001, Rome Italy. Pages 139-150
(http://www.acm.org/pubs/citations/proceedings/comm/381677/p139-meguerdichian/)

49.   Localized Algorithms In Wireless Ad-Hoc Networks: Location Discovery And Sensor Exposure
Seapahn Meguerdichian, Sasa Slijepcevic, Vahag Karayan, Miodrag Potkonjak
 
MobiHoc 2001, Long Beach, CA USA
(http://citeseer.nj.nec.com/461776.html)

50.     Residual Energy Scans for Monitoring Wireless Sensor Networks
Yonggang Jerry Zhao, Ramesh Govindan and Deborah Estrin
IEEE Wilress Communications and Networking Conference (WCNC'02) , Orlando, FL, USA, March 17-21, 2002
(http://citeseer.nj.nec.com/460449.html)

 

D – Simulations

51.     On modeling networks of wireless microsensors
Andreas Savvides, Sung Park and Mani B. Srivastava
Joint international conference on on Measurement and modeling of computer systems
June 16 - 20, 2001, Cambridge, MA United States Pages 318-319
(http://www.acm.org/pubs/citations/proceedings/metrics/378420/p318-savvides/)

52.     SensorSim: a simulation framework for sensor networks
Sung Park, Andreas Savvides and Mani B. Srivastava
Proceedings of the 3rd ACM international workshop on Modeling, analysis and simulation of wireless and mobile systems.  Pages 104-111
August 20, 2000, Boston, MA USA
(http://www.acm.org/pubs/citations/proceedings/comm/346855/p104-park/)

 

E – Applications

53.     Habitat Monitoring: Application Driver for Wireless Communications Technology
Alberto Cerpa, Jeremy Elson, Deborah Estrin, Lewis Girod, Michael Hamilton, Jerry Zhao
To appear in the Proceedings of the First ACM SIGCOMM Workshop on Data Communications in Latin America and the Caribbean, 3-5 April, 2001,
San Jose, Costa Rica. Also published as UCLA Computer Science Technical Report 200023, December 2000.
(http://www.circlemud.org/~jelson/writings/costarica/costarica.html)

54.     Research Challenges in Wireless Networks of Biomedical Sensors
Loren Schwiebert, Sandeep K.S. Gupta and Jennifer Weinmann
The seventh annual international conference on Mobile computing and networking 2001, 2001, Pages 151-165
(http://www.acm.org/pubs/citations/proceedings/comm/381677/p151-schwiebert/)

55.     Smart Kindergarten: Sensor-based Wireless Networks for Smart Developmental Problem-solving Environments
Mani Srivastava, Richard Muntz and Miodrag Potkonjak
The seventh annual international conference on Mobile computing and networking 2001
July 16 - 21, 2001, Rome Italy. Pages 132 - 138
(http://www.acm.org/pubs/citations/proceedings/comm/381677/p132-srivastava/)

56.     A taxonomy of Wireless Micro-Sensor Network Models
Sameer Tilak, Nael B. Abu-Ghazaleh and Wendi Heinzelman 
(
http://www.cs.binghamton.edu/~sameer/publications/main.pdf)

 

Wireless Ad Hoc Network

57.     Adaptive Energy-Conserving Routing for Multihop Ad Hoc Networks
Ya Xu, John Heidemann, and Deborah Estrin
Research Report527,  USC/Information Sciences Institute, October, 2000.
(http://www.isi.edu/~johnh/PAPERS/Xu00a.html)

58.     Energy efficient adaptive wireless network design
Paul J.M. Havinga, Gerard J.M. Smit, Martinus Bos
The Fifth Symposium on Computers and Communications (ISCC'00), Antibes, France, July 3-7, 2000
(http://citeseer.nj.nec.com/255365.html)

59.     Geography-informed energy conservation for Ad Hoc routing
Ya Xu, John Heidemann and Deborah Estrin
The seventh annual international conference on Mobile computing and networking 2001
July 16 - 21, 2001, Rome Italy.  Pages 70 - 84
(http://www.acm.org/pubs/citations/proceedings/comm/381677/p70-xu/)

60.     PAMAS - Power Aware Multi-Access protocol with Signalling for Ad Hoc Networks
S. Singh and C. S. Raghavendra
ACM ComputerCommunications Review, 1999
(http://citeseer.nj.nec.com/157040.html)

61.     Power-aware localized routing in wireless networks
I. Stojmenovic and Xu Lin
IEEE Int. Parallel and Distributed Processing Symp., Cancun, Mexico, May 1-5, 2000, to appear.
(http://citeseer.nj.nec.com/385034.html)

62.     Reducing the Energy Consumption of Group Driven Ad-hoc Wireless Communication
Sharad Agarwal, Randy H. Katz and Anthony D. Joseph
Report No. UCB/CSD-1-1127  January 2001
 (http://ncstrl.cs.cornell.edu:80/Dienst/UI/1.0/Display/ncstrl.ucb/CSD-01-1127)

63.     Scalable Routing Strategies for Ad-hoc Wireless Networks
A. Iwata, C.-C. Chiang, G. Pei, M. Gerla, and T.-W. Chen.
IEEE JSAC, August 1999
(http://citeseer.nj.nec.com/iwata99scalable.html)

URL's


The Computer for the 21st Century
M. Weiser
Scientific American, September 1991
http://nano.xerox.com/hypertext/weiser/SciAmDraft3.html

 

                                                   TOOLs

There are some very useful simulators specifically designed for sensor networks. I personally do not like ns2 however it is a well known standard for networking simulations in general. For sensor networks, some people tend to use other tools. Some EASY and friendly tools are mentioned below. I would recommend downloading them (windows or UNIX) and experimenting.

1- SENSE is similar to JSIM which i am quite familiar with. SENSE is written in C++, to avoid the inefficiency of JAVA. The problem i saw in SENSE however is there is no support for a MAC layer protocol. We have to see how to remove this NOT so reasonable assumption.http://www.cs.rpi.edu/~cheng3/sense/

2- VisualSense provides an accurate and extensible radio model. The radio model is based on a general energy propagation model that can be reused for physical phenomena.

VisualSense is a good framework; however, it does not provide any protocols above the wireless medium, nor any sensor or physical phenomena other than sound.

http://ptolemy.eecs.berkeley.edu/visualsense/Prowler (http://www.isis.vanderbilt.edu/projects/nest/prowler/index.html) and JProwler  (http://www.isis.vanderbilt.edu/projects/nest/jprowler/index.html) are probabilistic wireless sensor network simulators. Prowler is written in Matlab, while JProwler is written in Java. (J)Prowler is targeted to the Berkeley MICA Mote hardware platform running application built on TinyOS, though it could be modified to simulate more general systems. (J)Prowler provides an accurate radio model. However, it provides only one MAC protocol, the default MAC protocol of TinyOS (circa 2004). (J)Prowler also does not provide support for sensors or physical phenomena.

http://www.isis.vanderbilt.edu/projects/nest/prowler/index.html

4-SENS (http://osl.cs.uiuc.edu/sens/) is a high level sensor network simulator. SENS is written in C++ and built with the gcc compiler. SENS provides a few models of wireless medium ranging from: a simple perfect model; to a probabilistic message loss model; to  an interference and collision model. SENS does not accurately simulate a MAC protocol. SENS provides support for sensors, actuators, and physical phenomena only for sound.

http://osl.cs.uiuc.edu/sens/

These are the one that have their source available for the public. Some other simulators i have heard about are: TOSSIM & TOSSF, ATEMU and Sidh

I would very much recommend selecting one of the four simulators above for your project. Try to download them experiment with the sample code , read their tutorials and published papers.

Basic

NS2 Official Website
NS2 Beginner

NS2 by Example
Online Tutorial for the NS2
NS2 Tutorial Workshop 2002
Introducing NS2
NS-2 and Tcl
A online pdf version for Marc Greis tutorial
NS-2 Trace Formats
NS-2 class heirarchy
Doxygen documentation for ns2.26
 

NS2 extension

The Network Simulator: Contributed Code

Extensions to NS2 (NOAH etc.)
M/M/1 Queue Simulation
Mac Layer Modification (multi channels etc.)
Packet-level Peer-to-Peer Simulation Framework and GnutellaSim

Support for the PCF mode of IEEE 802.11

UMTS Extensions for NS2

Load tracing with ns-2 and MAC 802.11

ns2-wlan-patch (to support infrastructure mode simulation)

Some key and repeatable problems met during the simulation

UMTS Module and TCP NewVegas Module for ns

An IEEE 802.11e EDCF and CFB Simulation Model for NS-2.26

ns-802.11EDCF Wireless LAN

Achieving Higher Throughput and QoS in 802.11 Wireless LANs

Ns-2 modules of Westwood+ TCP with the New Reno feature

NORM (Nack-oriented reliable multicast) protocol implementation

Ns2-Cluster Based Routing Protocol( CBRP) implementation

NRL's Sensor Network Extension to NS-2

Opportunistic Auto Rate (OAR) and Ricean Fading Model in NS2

Ricean and Rayleigh fading Model in NS2 (CMU)

 

Updated version of Marc Greis' RSVP/ns software

MPLS model in NS2 (Siemens)

Another MPLS model via NS2

The implementation of WFQ via NS2

Class based weighted fair queueing in diffserv

 

NS2 or related Forums

Gmane(IETF)
Chinese Forum
NS2 Maillist
Bryan's NS2 DSR FAQ
802.11 implementation code (NS-2.26) commented by J. Robinson
Dazhi's answers on simulating wireless networks via NS2
NS2 common questions by Jim
Wireless LAN throughput simulation script(1 ns bw_exp.tcl 2 ./getplot 3 Change dataRate and repeat)

Required Related Knowledge for Simulation

Dmalloc

Bourne Shell Programming

Tracegraph

Debugging with GDB

A Good Tcl Tutorial
OTcl Tutorial

OTcl Objects
Gnuplot Central

IEEE 802.11 Protocol

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