Following are selected publications: On Mobile and Sensor Networks
- Other Selected Publications
For a more complete list of publications see Publications by year
- Publication
Citations (through Google Citations/Scholar)
Selected Publications (On Mobile and Sensor Networks)
- B. Alipour, L. Tonetto, R. Ketabi, A. Ding, J. Ott, A. Helmy,
“Where Are You Going Next? A Practical Multi-dimensional Look at Mobility Prediction”,
In proceedings of the ACM MSWiM (22nd International Conference on Modeling, Analysis and Simulation of Wireless and Mobile Systems), pp. 5-12, November 2019.
- R. Ketabi, M. Al-Qathrady, B. Alipour, A. Helmy, “Vehicular
Traffic Density Forecasting through the Eyes of Traffic Cameras; a
Spatio-Temporal Machine Learning Study”, In proceedings of the ACM MSWiM - DIVANet 9th ACM Symposium on Design and Analysis of Intelligent
Vehicular Networks and Applications, pp. 81-88, November 2019.
- B. Alipour, M. Al-Qathrady, A. Helmy, “Learning
the Relation Between Mobile Encounters and Web
Traffic Patterns: A Data-driven Study”, In proceedings of the ACM MSWiM (21st International
Conference on Modeling, Analysis and Simulation of
Wireless and Mobile Systems), pp. 289-293, October 2018. [Acceptance rate: ~27%].
- B. Alipour, L. Tonetto, R. Ketabi, A. Ding, J. Ott, A. Helmy, "Flutes
vs. Cellos: Analyzing Mobility-Traffic Correlations in Large WLAN Traces", IEEE INFOCOM, April 2018.
[Best Presentation in session] [Acceptance rate: 19%].
- R. Ketabi, B. Alipour, A. Helmy, "En Route:
Towards Vehicular Mobility Scenario Generation at Scale",
In proceedings of the IEEE INFOCOM – SmartCity workshop, May 2017. (Average review score ‘5/5’).
[Related poster is winner of The Best Poster Award, IEEE INFOCOM '17].
- G. Thakur, P. Hui, A. Helmy, "Evidence of Long Range Dependence and Self-similarity in Urban Traffic Systems",
In proceedings of the ACM SIGSPATIAL (International Conference on Advances in Geographic Information Systems), November 2015.
[Acceptance rate: 18%]
- G. Thakur, A. Helmy, "COBRA: A Framework for the Analysis of Realistic Mobility Models",
In proceedings of IEEE INFOCOM - Global Internet (GI) Symposium, pp. 3351-3356, April 2013.
[Winner of The Best Paper Award of the Internet Technical Committee (ITC) for 2013 (announced June 2015).
Selected from ~140 published papers in seven IEEE ComSoc conferences, and ~450 submitted papers.]
- D. Fay, G. Thakur, P. Hui, A. Helmy, "Knowledge Discovery and
Causality in Urban City Traffic: A study using Planet Scale
Vehicular Imagery Data", In proceedings of ACM SIGSPATIAL IWCTS (Int'l workshop on Computational Transportation Science),
November 2013. (Best Paper Award).
- G. Thakur, P. Hui, A. Helmy, "The
Structure and Traffic Flow
Anatomy of the Planet-Scale Urban Vehicular Mobility",
Networking Science Journal - Springer, ISSN 2076-0310, pp. 13-23, December 2013.
- W. Hsu, D. Dutta, A. Helmy, TRACE:
"Structural Analysis of User Association Patterns in University Campus Wireless LANs",
IEEE Transactions on Mobile Computing (TMC), Vol. 11, No. 11, pp. 1734-1748, November 2012.
(
Earlier version at ACM MobiCom, pp. 338-341, Sept. 2007. [In the top 11% of 233 submissions.])
[Extended version as technical report].
- W. Hsu, D. Dutta, A. Helmy, "CSI: A Paradigm for Behavior-oriented Profile-cast
Services in Mobile Networks, Ad Hoc Networks Journal - Elsevier, Vol. 10, Issue 8, pp. 1586-1602, November 2012.
(Earlier short version in ACM Mobile Computer and Communications Review (MC2R), Vol.
12, Issue 1, pp. 52-54, January 2008. [Top 5 in ACM Mobicom 07 SRC, out of ~60 submissions].
Conference version
appeared in IEEE WCNC (Wireless Communications and Networking Conference), pp. 3033-3038, March 2008).
-
S. Wang, A. Helmy,
"BEWARE:
Background Traffic-Aware Rate Adaptation for IEEE 802.11",
Extended (plenary session) paper at The 9th IEEE International Symposium on a World of Wireless, Mobile and Multimedia Networks (WoWMoM), June 2008 [Acceptance rate of Extended papers at the plenary session: 7% of 181 submissions.
Acceptance rate overall: 17%] (Journal version in IEEE/ACM Transactions on Networking, Vol. 19, Issue 4, August 2011.).
(Earlier short version in ACM MC2R, Vol. 13, Iss. 3, pp. 46-49, Jul 09. [4th place finalist in ACM
MobiCom 08 SRC, out of ~60 submissions]).
- S. Moghaddam, A. Helmy, S. Ranka, M. Somaya,
"Data-driven
Co-clustering Model of Internet Usage in Large Mobile Societies",
13th ACM Int'l Conf on Modeling, Analysis
and Simulation of Wireless and Mobile Systems (MSWIM), Oct 2010
[Typical acceptance rate: ~20%].
- U. Kumar, A. Helmy, "Extract: Mining Social Features from WLAN
Traces: A Gender-Based Case Study", ACM MSWIM,
Oct 2010.
(Workshop version presented at
IEEE/ACM IPSN Int'l Workshop on Mobile Device and Urban Sensing (MODUS), April 2008.
Earlier short version in ACM MC2R,
Vol. 12, Issue 1, pp. 40-42, January 2008. [Winner of 3rd place prize in ACM Mobicom 2007 Student Research Competition (SRC), out of ~60 submissions]).
-
W. Hsu, T. Spyropoulos, K. Psounis, A. Helmy, TVC:
"Modeling
Spatial and
Temporal Dependencies of User Mobility in Wireless Mobile Networks",
IEEE/ACM Transactions on Networking, pp. 1564-1577, Vol. 17, No. 5, October 2009.
(Conference version appeared in
IEEE INFOCOM, pp.758-766, May 2007 [Acceptance rate: ~17%]).
- IMPACT study:
-
- W. Hsu, A. Helmy, "On Nodal Encounter Patterns in Wireless LAN
Traces", IEEE Transactions on Mobile Computing (TMC), pp. 1563-1577, November 2010.
(Earlier version in
IEEE WiNMee, April 2006. Nominated for best paper award at USC EE Dept, 2006).
- - W. Hsu, A. Helmy, "On
Modeling User Associations in Wireless LAN Traces on University Campuses",
IEEE Int'l Workshop on Wireless Network Measurement (WiNMee),
April 2006.
-
K. Seada, A. Helmy, R2D2: "Geographic Rendezvous-based
Architectures for Emergency Data Dissemination",
Journal on Wireless Communications and Mobile Computing, Wiley, Vol. 10, Issue 9, pp. 1221-1237,
September 2010.
(Early version).
(Conference version appeared in IEEE/ACM IPDPS
Int'l Workshop on Algorithms for Wireless, Mobile, Ad Hoc and Sensor Networks (WMAN), pp.218-225, Apr 2004. Paper among the best reviewed.).
- S. Tanachaiwiwat, A. Helmy, "Encounter-based Worms: Analysis
and Defense", Ad Hoc Networks Journal - Elsevier. Volume 7, Issue 7, Pages 1414-1430, September 2009.
(Conference version appeared in
ACM MobiCom Workshop on Challenged Networks (CHANTS),
pp. 67-74, September 2007).
- Y. Kim, A. Helmy, "CATCH: A Protocol Framework for
Cross-layer Attacker Traceback in Mobile Multi-Hop Networks",
Ad Hoc Networks Journal - Elsevier, pp. 193-213, Vol. 8, Issue 2, March 2010.
(Conference version in Proceedings of the ACM SASN
(fourth ACM workshop on Security of ad hoc and sensor networks),
pp. 123-134, October 2006.)
-
M. Zuniga, K. Seada, B. Krishnamachari, A. Helmy, "Efficient
Geographic
Routing over Lossy Links in Wireless Sensor Networks", ACM
Transactions
on Sensor Networks (TOSN), pp. 12:1-33, Article 12 (33 pages), Vol.
4, No. 3, May 2008.
(Conference version
appeared in ACM SenSys (Conference on Embedded Networked Sensor Systems), pp. 108-121, November 2004.
[Acceptance: 14%] [Nominated for best paper award at USC EE Dept, 2005]).
(Related work on geographic
routing with power control appeared in IEEE SECON, Sep 2005 [Acceptance: 27%]).
-
K. Seada, A. Helmy, R. Govindan,
"Modeling and Analyzing the Correctness
of Geographic Face Routing under Realistic Conditions", Ad Hoc
Networks Journal - Elsevier, Special issue on Recent Advances in Wireless Sensor Networks, pp. 855-871, Vol. 5, Issue 6, August 2007.
(Conference version appeared in
IEEE/ACM IPSN (Int'l Symposium on Information Processing in Sensor Networks), pp. 71-80, April 2004.
[Acceptance rate: 33% of 150] [Nominated for best paper award at USC EE Dept, 2004]).
- K. Nahm, A. Helmy, C.-C. Kuo, "Cross-layer
Interaction of TCP and Ad Hoc Routing
Protocols in Multihop 802.11 Networks", IEEE Transactions on
Mobile Computing (TMC), pp. 458 - 469, Vol. 7, Issue 4, April 2008.
(Conference version appeared in
ACM MobiHoc (Int'l Symposium on Mobile Ad Hoc Networking and Computing), pp. 277-287, May 2005. [Acceptance rate: 14% of 281
submissions]).
- F. Bai, A. Helmy, MAID:
"Impact
of Mobility on Mobility-Assisted Last Encounter Based Routing
Protocols",
IEEE SECON (Communications Society Conference on Sensor, Mesh and Ad Hoc Communications and Networks), pp. 461-470, June 2007. [Acceptance: 20%]. (Journal version in submission).
-
K. Seada, A. Helmy, "Efficient
and Robust Geocasting Protocols for Sensor Networks", Computer
Communications Journal-Elsevier, Special Issue
on Dependable Wireless Sensor Networks,
Vol. 29, Issue 2, pp. 151-161, January 2006
(Conference version appeared
IEEE WCNC, pp. 2551 - 2556, March 2004).
- A. Helmy, S. Garg, P. Pamu, N. Nahata, "CARD:
A Contact-based
Architecture for Resource Discovery in Ad Hoc Networks", ACM Mobile
Networks and Applications (MONET) Journal, Vol. 10, Issue 1, pp.
99-113, February 2005. [Acceptance rate: 22% of 60 submissions]
(Conference version appeared in IEEE/ACM IPDPS Int'l
Workshop on Wireless, Mobile and Ad Hoc Networks (WMAN), pp. 219-227,
Apr 2003. [Acceptance: 29%] [Paper was among the best reviewed. Selected for forwarding to the ACM MONET Journal]).
- N. Sadagopan, B. Krishnamachari, A. Helmy, ACQUIRE: "Active Query Forwarding in
Sensor Networks", Ad Hoc Networks Journal - Elsevier, Vol. 3, Issue 1, pp. 91-113, January 2005. [Acceptance rate: 12%]
(Conference version" appeared in IEEE ICC Int'l
Workshop on Sensor Network Protocols and Applications (SNPA), pp. 149-155, May 2003. [Acceptance: 37%]).
-
A. Helmy, TRANSFER: "Contact-extended
Zone-based Routing for Transactions in Ad Hoc
Networks", IEEE Transactions on Vehicular Technology, Vol. 54,
No. 1, pp. 307-319, January 2005.
(Conference version appeared in IEEE GLOBECOM (Global Telecom. Conf), pp. 398-404,
December 2003. [Acceptance: 27%]).
-
F. Bai, N. Sadagopan, B. Krishnamachari, A. Helmy, PATHS:
"Modeling Path Duration
Distributions in MANETs and their Impact on Routing Performance", IEEE Journal on Selected
Areas in Communications (JSAC),
Vol. 22, No. 7, pp. 1357-1373, September 2004. [Acceptance rate: 18% of
82] [Nominated for best paper award at USC EE Dept, 2005].
(Conference version appeared in
ACM MobiHoc, pp. 245-256, June 2003. [Acceptance rate: 15% of 189 submissions]).
- D. Son, A. Helmy, B. Krishnamachari, "The
Effect of Mobility-induced Location Errors on Geographic Routing in Mobile
Ad Hoc and Sensor Networks: Analysis and Improvement using Mobility
Prediction", IEEE Transactions on Mobile Computing (TMC),
Special issue on Mission-Oriented Sensor Networks, Vol. 3, No. 3, pp.
233-245, July 2004 [Acceptance rate: 25%]
(Conference version
appeared in IEEE WCNC, pp. 189-194 March 2004).
-
F. Bai, N. Sadagopan, A. Helmy,
"The IMPORTANT Framework for Analyzing the Impact of Mobility on Performance of Routing for Ad Hoc Networks",
Ad Hoc Networks Journal - Elsevier, Vol. 1, Issue 4, pp. 383 - 403, November 2003.
[Acceptance rate: 12%][Nominated for best paper award at USC EE Dept, 2004].
On the top 25 most requested articles (Ad Hoc Networks Journal) for
Jan-Dec'03 & Jan-Mar'04.
(Conference version appeared in IEEE INFOCOM,
pp. 825-835, April 2003. Paper selected for fast-track to the Ad Hoc Networks Journal. [Infocom acceptance rate: 20% of 1078 submissions])
- A. Helmy, "Mobility-Assisted
Resolution of Queries in Large-Scale
Mobile Sensor Networks (MARQ)", Computer Networks Journal -
Elsevier, Special issue on Wireless Sensor Networks, Vol. 43, Issue 4,
pp. 437-458, November 2003. [Acceptance rate: 24% of 25 submissions].
- A. Helmy, "Small
Worlds in Wireless Networks", IEEE Communications Letters, pp. 490-492, Vol. 7, No. 10, October 2003.
- A. Helmy, M. Jaseemuddin, Ganesha Bhaskara, M&M: "Multicast-based
Mobility: A Novel Architecture for Efficient Micro-Mobility", IEEE
Journal on Selected Areas in Communications (JSAC), Vol. 22, No. 4,
pp. 677-690, May 2004. [Acceptance rate: 25% of 60 submissions]
(Earlier work on M&M appeared in
ACM SIGCOMM Int'l Workshop on Networked Group Communication (NGC), pp. 49-58, November 2000. [Acceptance: 24%]).
Other Selected Publications
- S. Ebrahimi, A. Helmy, S. Gupta, "TCP
vs. TCP: a Systematic Study
of Adverse Impact of Short-lived TCP Flows on Long-lived TCP Flows",
IEEE INFOCOM, pp. 926-937, March 2005. [Acceptance rate: 17% of
1419 submissions] [Nominated for best paper award at USC EE, 2005].
- A. Das, D. Dutta, A. Helmy, A. Goel, J. Heidemann, "Low
State Fairness: Lower Bounds and Practical Enforcement", IEEE
INFOCOM, pp. 2436-2446, March 2005 [Acceptance rate: 17%].
(The framework design
appeared in IEEE Communications Letters, Vol. 8, No. 9, pp. 588-590, Sept 2004.)
(Earlier work on Fair
Stateless Aggregate Marking with A. Das and D. Dutta appeared in
IEEE/IFIP MMNS (Management of Multimedia Networks and Services, pp. 211-223, October 2002. (Best Paper Award)).
-
A. Helmy, S. Gupta, "FOTG: Fault Oriented Stress Testing of Multicast
Routing", IEEE Communications Letters, Vol. 9, No. 4, pp. 375-377, April 2005.
(Conference version
appeared in IFIP FORTE/PSTV, Paris, pp. 93-109, November 1998. [Acceptance rate: 30% of 85],
and another conference version" comparing forward and backward search appeared
IEEE ICCCN (IC3N), pp. 590-597, October 2000.)
-
K. Seada, A. Helmy, S. Gupta, "A
Framework for Systematic Evaluation of
Multicast Congestion Control Protocols", IEEE Journal on Selected
Areas in Communications (JSAC), Volume 22, Issue 10, pp. 2048- 2061,
December 2004. [Nominated for best paper award at USC EE, 2005].
- A. Helmy, S. Gupta, D. Estrin, "The STRESS Method for Boundary-point
Performance Analysis of End-to-end Multicast Timer-Suppression Mechanisms", IEEE/ACM Transactions on Networking, Volume 12, Issue 1, pp.
44-58, February 2004. [Acceptance rate '03: 18% of 439]
(Conference version appeared in IFIP FORTE/PSTV (Formal
Description Techniques & Protocol Specification, Testing, and Verification, pp. 187-202, October 2000. [Acceptance: 34% of 63]).
-
L. Breslau, D. Estrin, K. Fall, S. Floyd, J. Heidemann, A. Helmy, P.
Huang, S. McCanne, K. Varadhan, Y. Xu, H. Yu, NS-2: "Advances in Network
Simulation", IEEE Computer, vol.33, No.5, pp. 59-67, May 2000. [Top 65
most cited papers in computer science in 2000 (Citeseer Jul '03)]
- PIM-SM protocol:
- - D. Estrin, M. Handley, A. Helmy, P. Huang, D. Thaler,
"A Dynamic Bootstrap Mechanism for Rendezvous-based Multicast Routing",
IEEE INFOCOM, Vol. 3, pp. 1090-1098, March 1999. [Acceptance rate: 30% of 600 submissions].
-
- D. Estrin, D. Farinacci, A. Helmy, D. Thaler, S. Deering, V. Jacobson, M. Handley, C. Liu, P. Sharma, L. Wei,
"Protocol Independent Multicast - Sparse Mode (PIM-SM): Protocol
Specification",
RFCs 2362 of the Internet Engineering Task Force (IETF),
Inter-Domain Multicast Routing (IDMR), June 1998.
[RFC2362. Earlier version as RFC2117 in 1997]
- - D. Estrin, D. Farinacci, A. Helmy, D. Thaler, S. Deering, V. Jacobson, M. Handley, C. Liu, P. Sharma, L. Wei, "Protocol
Independent Multicast (PIM): Motivation and Architecture", Proposed RFC of the IETF, Inter-Domain Multicast Routing (IDMR), October 1996.