tools for the analysis and design of complex multi-scale networks: overview muri annual review...

Tools for the Analysis and Design of Complex Multi-Scale Networks:Overview

• MURI Annual ReviewColumbus OH, October 14, 2010

• J. Walrand, PI

1. Team

• Venkat Anantharam, UCB • John Doyle, Caltech• Weibo Gong, UMASS • Steven Low, Caltech • R. Srikant, UIUC• Don Towsley, UMASS• Jean Walrand, UCB• Avideh Zakhor, UCB

• 14 PhD Students, 7 Postdocs• 14 Journal Papers, 22 Conference papers

2. Scientific Objectives and Technical Approach


High ThroughputLow EnergyLow Delay

SecurityReliability


High Throughput/ Low Energy Low Delay

SecurityReliability

Optimization-Based Protocols HT & LRD mitigation

Statistical Network Measurements

Methodology for LRD

Noise-Based SchemesGame:

Attack/Defense

3. Scientific Issues

Local Information - Global ImpactMultiple Time Scales:LRD trafficLink FadingMAC AdjustmentRoutingCongestion Control

Uncertainty

Security Concerns



Methodology for LRD


Attack/Defense

4. Scientific Accomplishments

Low Delay

SecurityReliability

Optimization-Based Protocols


Methodology for LRD

Noise-Based Schemes

Adaptive CSMA ProtocolsImproved WiFi w. error

classification

Mitigate HT through - multiple paths - file partitioning

Frontier Sampling of Large Networks

SDE Models & Stochastic Approximations for LRD

Dynamic Shared SecretsGraph Vulnerability; Strategies w. Uncertainty

Energy Efficiency

High Throughput/ Low Energy



Methodology for LRD


Attack/Defense

Low Delay

SecurityReliability

Optimization-Based Protocols


Methodology for LRD

Noise-Based Schemes

Adaptive CSMA ProtocolsImproved WiFi w. error

classification

Mitigate HT through - multiple paths - file partitioning

Frontier Sampling of Large Networks

SDE Models & Stochastic Approximations for LRD

Dynamic Shared SecretsGraph Vulnerability; Strategies w. Uncertainty

Energy Efficiency

High Throughput/ Low Energy

4. Scientific Accomplishments

Compression & Stochastic Approx. - Anantharam

Scheduling & Energy – Lavaei, Low

Mixing & Bounds - Srikant

Improved WiFi - Zakhor

Multipath – Wei Wei

Sampling of Large Networks - Towsley

Dynamic Shared Secrets - Xiao

Graph Game; Optimism - Walrand

low delay region

capacity region

Adaptive CSMA Protocol

This distributed protocol achieves the Maximum Throughput [Intuition: Approaches Maximum Weight after Mixing Time]

Libin Jiang & Jean WalrandDelay Polynomial in Number of Links [Intuition: Fast Mixing when load is small]

Jiang, Leconte, Ni, Srikant, Walrand

CSMA with mean backoff delay decreasing in backpressure [Mathematically: Maximize Entropy + Utility]

Improved WiFi with Error Classification [Zakhor, Krishnan, Haghani]

• Question: What causes packet drops?

• Noise, Hidden Node, Exposed Node?

• Method to get answer: Combine local channel activity with AP channel activity• Use that information to adapt link => up to 400% throughput increase

• Adaptive carrier sense threshold algorithm => up to 50% throughput increase

• Verified performance through comprehensive NS-2 simulations.

Compression of LRD Processes[Anantharam, Barlas]

• Example: Entropy density of a long range dependent renewal process also long range dependent with same Hurst exponent. Hence lossless compression does not reduce LRD

• Tradeoff LRD vs. Compression Loss• Characterization of functionals of LRD Markov

chains that are also LRD

File Fragmentation to Avoid Heavy Tails[Low, Doyle]

• Motivation: Can retransmission create heavy-tailed file transfer times even when file sizes are light-tailed?

• Analysis: – In general, YES!– Avoided with reasonable fragmentation policies– Optimal policy uses constant fragment size

• Design: – Blind policy that is robust and

asymptotically optimal

Dynamic Shared Secrets[Gong, Towsley]

• Alice sends packets to Bob• Bob sends feedback listing

correctly received packets• Alice, Bob generate a key using

correctly received packets

Unreliability: Wireless channels unreliable by natureIndependence: Wireless channels have independent error behavior as long as not co-located

Nonzero probability that Bob receives packets Eve did not!

⇒ Alice, Bob can generate private key

Alice Bob

Eve

5. Group SynergyCollaboration UIUC - UCB

Delays in Adaptive CSMA ProtocolImpact of Collisions

Collaboration UMASS - CALTECHFile Partitioning Algorithms

Collaboration UCB – CALTECHLibin Jiang (UCB postdoc) will join Caltech (postdoc) in September

Collaboration across projectsUMASS – Shroff: Mutlipath protocols and LRD

Future collaboration across projectsExploration of delay-based protocolsCombination of LQF and Adaptive CSMA

6. Future PlansAlternative Metrics for Wireless Networks

Likelihood of delivery within deadlineMaximum reliability deliveryEnergy

Dynamic control approach to protocol designImprove transient behavior and performance with mobility

Control methodology for LRDBased on new SDE models

Refinements of improved WiFi protocolsBased on loss differentiation

Collaboration on transitionSupport for implementation of new algorithms and protocols

7. Today’s Agenda9:20AM — 10:00AM Heavy Tails: Compression and Stochastic Approximations

(Venkat Anantharam)10:00AM — 10:30AM Dynamics, Security, Uncertainty (Jean Walrand)10:30AM — 10:45AM Coffee Break10:45AM — 11.25AM Throughput Enhancement in Wireless LANs (Avideh

Zakhor)11:25AM — 12:05PM Multipath Communications and Power Laws (Wei Wei)

12:05PM — 1.00PM Lunch Break

1:00PM — 1:25PM Dynamic Secrets in Wireless Communications (Sheng Xiao)1:25PM — 1:50PM Sampling large complex networks (Don Towsley)1:50PM — 2:30PM Mixing Time of Parallel Glauber Dynamics and Queue

Length Bounds for CSMA Scheduling (R. Srikant) 3:00PM — 3:20PM Break3:20PM — 4:00PM Overview of Caltech Projects, Scheduling & Energy

Efficiency with Heavy Tail (Steven Low)4:00PM — 4:40PM Optimal Wireless Protocols and Devices (Javad Lavaei)

4:40PM — 5:00PM Harry Chang and Government Team

Publications

JOURNALS

[P1] C. W. Tan and A. R. Calderbank, "Multiuser Detection of Alamouti Signals," IEEE Transactions on Communications, Vol. 57, No. 7, pp. 2080-2089, Jul. 2009.

[P2] C. W. Tan, D. P. Palomar and M. Chiang, "Energy-Robustness Tradeoff in Cellular Network Power Control," IEEE/ACM Transactions on Networking, Vol. 17, No. 3, pp. 912-925, Jun. 2009.

[P3] K. Jacobsson, L. L. H. Andrew, A. K. Tang, S. H. Low and H. Hjalmarsson, "An Improved Link Model for Window Flow Control and Its Application to FAST TCP, " in IEEE Transactions on Automatic Control, March 2009.

[P4] Chen, L., T. Cui and S. H. Low, " A Game-theoretic Framework for Medium Access Control," IEEE Journal of Selected Areas in Communications, 26(7):1116-1127, September 2008.

[P5] Chen, L., S. H. Low and J. C. Doyle, "Random Access Game and Medium Access Control Design," IEEE/ACM Transactions on Networking, submitted 2008.

[P6] Chen, L., T. Ho, M. Chiang, S. H. Low and J. C. Doyle, "Congestion Control for Multicast Flows with Network Coding," IEEE Transactions on Information Theory, submitted 2008.

[P7] Venkat Anantharam,``Counterexamples to a proposed Stam inequality on finite groups," IEEE Transactions on Information Theory, submitted August 2009.

Publications

JOURNALS

[P8] Y. Cai, Patrick P. C. Lee, W. Gong, D. Towsley. “Analysis of Traffic Correlation Attacks on Router Queues,” under review J. Computer Networks.

[P9] B. Jiang, R. Brockett, W. Gong, D. Towsley. “Stochastic differential equations for power law behaviors”, submitted to J. Applied Probability.

[P10] W. Gauvin, B. Ribeiro, B. Liu, D. Towsley, J. Wang. “Measurement and gender-specific analysis of user publishing characteristics on MySpace,” to appear in IEEE Network.

[P11] B. Ribeiro, D. Towsley. “Estimating and Sampling Graphs with Multidimensional Random Walks,” arXiv:1002.1751, under sumission.

[P12] L. Ying, R. Srikant D. Towsley, “Cluster-Based Back-Pressure Routing Algorithm,” submitted to IEEE/ACM Trans. on Networking. (Collaborative effort.)

[P13] Libin Jiang and Jean Walrand, “A Distributed CSMA Algorithm for Throughput and Utility Maximization in Wireless Networks,” to appear in IEEE/ACM Transactions on Networking.

[P14] L. Jiang, D. Shah, J. Shin, J. Walrand, “Distributed Random Access Algorithm: Scheduling and Congestion Control,” to appear in IEEE Transactions on Information Theory.

PublicationsCONFERENCES

[C1] Javad Lavaei, John Doyle and Steven Low, "Congestion Control Algorithms from Optimal Control Perspective," IEEE Conference on Decision and Control, Dec 2009.

[C2] K. Jacobsson, L. L. H. Andrew and A. Tang, "Stability and Robustness Conditions using Frequency Dependent Half Planes," IEEE Conference on Decision and Control, Dec 2009.[

C3] M. Wang, C. W. Tan, A. Tang and S. H. Low, "How Bad is Single Path Routing? " Proc. IEEE GLOBECOM, Honolulu, Hawaii, Nov 30-Dec 4, 2009.

[C4] C. W. Tan, M. Chiang and R. Srikant, "Optimal Power Control and Beamforming in Multiuser Downlink Systems," Proc. Asilomar Conference on Signals, Systems and Computers, Monterey, CA, Nov 2009.

[C5] W. Song, M. Krishnan, and A. Zakhor, “Adaptive Packetization for Error-Prone Transmission over 802.11 WLANs with Hidden Terminals,” IEEE International Workshop on Multimedia Signal Processing, Rio de Janeiro, Brazil, October 2009.

[C6] M. Krishnan, S. Pollin and A. Zakhor, "Local Estimation of Collision Probabilities in 802.11 WLANs With Hidden Terminals," IEEE Globecom 2009 Wireless Networking Symposium (GC'09-WNS), Honolulu, HI, December 2009.

[C7] Libin Jiang and Jean Walrand, "Utility-Maximizing Scheduling for Stochastic Processing Networks," Forty-Seventh Annual Allerton Conference, Illinois, USA September 2009

[C8] Libin Jiang and Jean Walrand, "Convergence and Stability of a Distributed CSMA Algorithm for Maximal Network Throughput," IEEE Conference on Decision and Control, Dec 2009.


[C9] L. Jiang and J. Walrand, "A Distributed CSMA Algorithm for Throughput and Utility Maximization in Wireless Networks," Forty-Sixth Annual Allerton Conference, Illinois, USA September 23-26, 2008.

[C10] L. Jiang and J. Walrand, "Approaching Throughput-Optimality in a Distributed CSMA Algorithm: Collisions and Stability," Mobihoc 2009, New Orleans, LA, May 2009. (Best Student Theory Presentation.)

[C11] J. Lee and J. Walrand, "Reliable relaying with uncertain knowledge," Game Theory for Networks, vol., no., pp.82-87, 13-15 May 2009.

[C12] C. W. Tan, M. Chiang and R. Srikant, "Maximizing Sum Rate and Minimizing MSE on Multiuser Downlink: Optimality, Fast Algorithms, and Equivalence via Max-min SIR," Proc. IEEE ISIT, Seoul, South Korea, Jun 28-Jul 3, 2009.

[C13] Jayakrishnan Nair and Steven H Low, "Optimal Job fragmentation (Extended Abstract)", The Eleventh Workshop on Mathematical Performance Modeling and Analysis, Seattle, WA, June 2009; Also in Performance Evaluation Review, 2009.

[C14] C. W. Tan, M. Chiang and R. Srikant, "Fast Algorithms and Performance Bounds for Sum Rate Maximization in Wireless Networks," Proc. IEEE INFOCOM, Rio de Janerio, Brazil, Apr 20-25, 2009.

[C15] M. Suchara, L. L. H. Andrew, R. Witt, K. Jacobsson, B. P. Wydrowski, and S. H. Low, "Implementation of Provably Stable MaxNet," in Proc. of BROADNETS 2008, London, UK, September 2008.


[C16] S. Xiao, W. Gong, D. Towsley. “Secure Wireless Communication with Dynamic Secrets”, INFOCOM 2010. (1 of 3 best paper award finalists out of 1535 submissions).

[C17] J. Tan, W. Wei, B. Jiang, N.B. Shroff. “Can Multi-Path Mitigate Power Law Delays? -- Effects of Parallelism on Tail Performance,” ITC’22, Sept. 2010. (Collaborative effort.)

[C18] B. Ribeiro, W. Gauvin, B. Liu, D. Towsley. "On MySpace Account Spans and Double Pareto-Like Distribution of Friends", IEEE Infocom 2010 Network Science Workshop.

[C19] H. Zhao, C.H. Xia, Z. Liu, D. Towsley. "Distributed Resource Allocation for Synchronous Fork and Join Processing Networks", IEEE Infocom Mini-conference, March, 2010.

[C20] H. Zhao, C.H. Xia, Z. Liu, D. Towsley. “A Unified Modeling Framework for Distributed Resource Allocation of General Fork and Join Processing Networks,” ACM SIGMETRICS 2010, June 2010.

[C21] L. Jiang and J. Walrand, “Distributed Protocols for Wireless Networks,” Keynote, WiOpt, June 2010.

[C22] Libin Jiang, Jian Ni, R. Srikant, and Jean Walrand, "Performance Bounds of Distributed CSMA Scheduling," (invited), Information Theory and Application Workshop, UCSD, Feb 2010. (Collaborative effort.)

tools for the analysis and design of complex multi-scale networks: overview muri annual review...

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