WP4.d: KTH General Report

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WP4.d KTH General Report C. Fischione, H.
Hjalmarsson, K.H. Johansson, M. Johansson
2nd WP4.d meeting - Siena, Jul 18, 2005
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Outline

• Overview of past and current activities
• Cooperation with HYCON partners
• Activity plan for months 13-18
• Inputs for case studies
• Proposals for JPA to be defined for months 19-30

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Overview of past and current activities

• Radio Resource management
• Resource bidding mechanisms for latency, jitter,
  connectivity, bandwidth, power
• Enable performance guarantees despite network
  variations
• Quality of Service and Quality of Control
• Fundamental requirements for classes of
  applications and platforms
• Wireless Automation
• Control under limited and varying communication
  and computation resources
• Design methods and algorithms that address
  distributed sensors and actuators
• Time- and event-triggered control and
  communication paradigms
• Self-organisation and reconfiguration

• Cross-layer feedback
• Mechanisms to handle heterogeneity and
  fluctuations
• Signaling from lower layers to counteract
  time-variations and disturbances
• Improved link-layer performance by locally tuned
  algorithms

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Overview of past and current activities
Radio Resource Management
Wireless Automation

• C. Fischione
• O. Flärdh
• H. Hjalmarsson
• K. Jacobsson
• B. Johansson

• C. Fischione
• K. H. Johansson
• A. Speranzon

• K. H. Johansson
• M. Johansson
• N. Möller
• P. Soldati

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Feedback Control Mechanism for Cross-Layer
Adaptation in Wireless Internet

• Integration of cellular network and Internet is
  hard due to radio link variations
• When used over wireless links, TCP cannot ensure
  a high link utilization.
• Improved traffic throughput through new radio
  network feedback protocol
• Proxy adapt sending rate to radio bandwidth
  variations obtained from RNC

Collaboration with Justus Petersson, Robert Skog
and Åke Arvidsson
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Modelling of TCP/IP over Wireless Networks (with
UAQ)

• Multi-state first order Markov chain model
• Multi-user interference in the presence of
  heterogeneous traffic sources.
• Power control (inner and outer loop).
• Error recovery mechanisms at the data link layer.
  
• TCP end-to-end congestion control mechanisms.

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Adaptive Error Correction for Packet-Switched Data
Packet loss is compensated with a feedback
control mechanism that adds adaptive redundancy
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Self-Organizing scheduling

• Goal Scheduling as many links as possible in
  each time slots avoiding any centralized
  coordination and exploiting persistence
  probabilities to access the channel
• Nodes must locally coordinate themselves to
  avoid packets collision and to maximize the
  network utility.
• Applications Dynamic and decentralized sensors
  networks, ad hoc networks.
• Analysis steps and Preliminary Results
• Theoretical performance achievable with
• primary interference only (orthogonal
  channels).
• Theoretical performance achievable with both
• primary and secondary interference
  constraints
• (centralized solution).
• Performance due to probabilistic self-organizing
• scheduling.

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Integration of Sensor Networks and deployed
Infrastructures
Wide area network
Disaster site
Fixed sensor/camera network
Mobile human operator
Mobile sensors
Cellular network
Head of Operation
Mobile robot
Mobile and Stationary Monitoring
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Collaborative Spatio-Temporal filtering in WSN

• Collaborative STP is a control technique to
  increase the quality of the transmitted and
  received signals
• The integrity of the signals have a strong
  influence on the physical layer performances,
  Routing, MAC applications
• The stability of closed loop control system may
  require a specified quality of the signal (BER,
  Outage probability,..)

Inverted Pendulum
SINR(t)
Sensor Node
SINR Th
t
Data Collector
Controller
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Estimation in WSNs

• Relations between MAC scheme and Data estimation
• Distributed broadcasting of new estimations in a
  Flat WSN
• The estimation algorithms are affected by latency
  events

1
2
4
5
Estimation
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In Hierarchical WSN
In a Flat WSN
Controller
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Event-Triggered Data TransmissionChange
Detection and Sensor Networks
Dont speak if you have nothing to say

• Ambient monitoring
• Use local data to detect changes with a
  Cumulative Sum Test (optimal filtering)
• If a change is detected locally, alert the
  central node

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Consensus problem

• State information exchanged over quantized
  wireless channel
• Design of a state feedback control law to achieve
  consensus
• Network topology influences the task performance

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Wireless Automation Test and Verification
Change Detection
Integration of Sensor Networks and
Infrastructures
Probabilistic Self-Organizing Scheduling
AEGIS Graphic and Data Interface
Consensus Problem
MAC effects in Data Estimation
Spatio-Temporal Filtering
Omnet simulator environment
Tmote-sky mote
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Outline

• Overview of past and current activities
• Cooperation with HYCON partners
• Activity plan for months 13-18
• Inputs for cases studies
• Proposals for JPA to be defined for months 19-30

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Cooperation with HYCON partners

• Researchers and Students mobility
• ? KTH K.-E. Arzen, A. Bicchi, A. Cervin, M.
  Cippitelli, F. Gunnarsson, S. Loretti, J.
  Lygeros, G. Nikolakopoulos, D. Pallassini, C.
  Rinaldi, F. Santucci, P. Soldati, J. Sousa
• KTH ? K. H. Johansson, M. Johansson
• UNISI ? KTH P. Soldati (Ph.D. Student)
• UAQ ? KTH C. Fischione (Post Doc)
• Industrial cooperation
• Ericsson (IAB) Cross-layer feedback for TCP over
  wireless (PhD projects)
• ABB Corporate Research Wireless automation (MSc
  projects)
• Scania (IAB) Telematics for improved fuel
  efficiency (PhD projects)
• Swedish Defence Agency (IAB) Networked vehicles
  (PhD projects)

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Outline

• Overview of past and current activities
• Cooperation with HYCON partners
• Activity plan for months 13-18
• Inputs for cases studies
• Proposal for JPA to be defined for months 19-30

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Activity plan for months 13-18

• Radio Resource Management
• Wireless Automation
• Sharing of software for the Motes
• Continued Collaboration MSC exchange
• Contribute to WP4d.2.2

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Outline

• Overview of past and current activities
• Cooperation with HYCON partners
• Activity plan for months 13-18
• Inputs for cases studies
• Proposal for JPA to be defined for months 19-30

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Inputs for cases studies

• Radio Resource Management
• Power-Rate allocation policies for TCP
  optimization over wireless.
• Link Layer Error Recovery techniques for TCP over
  wireless.
• Network-wide resource allocation in Ad-hoc
  Networks
• Wireless Automation
• Co-design of controllers and network protocols
• MAC effects on data estimation and control.
• Collaborative processing
• Consensus problems.
• Spatio-temporal filtering.
• Distributed change detection.

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Outline

• Overview of past and current activities
• Cooperation with HYCON partners
• Activity plan for months 13-18
• Inputs for cases studies
• Proposal for JPA to be defined for months 19-30

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Proposals for JPA to be defined for months 19-30

• Continued research focus on Resource Management
  and Wireless Automation
• Sharing of software and experience of WSN
  platforms
• Cross WP activities
• Application-oriented WP4d-WP4b, WP4c
• Dissemination-oriented WP1, WP6
• Organize invited sessions, workshop, special
  journal issue.