Alvaro Araujo

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CONNECTIVITY BROKERTowards Absolutely Reliable
Wireless Systems (First Step)

• Alvaro Araujo
• Ali Ercan, Arash Parsa, Pavan Yedavalli, Jan
  Rabaey

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OUTLINE

• Motivation
• Challenges
• Connectivity Broker
• Architecture
• Modules
• Scenarios
• TestBed
• Future work

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MOTIVATION
Jan Rabaey BWRC Summer Retreat 2008
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MOTIVATION

• How many cell phones do you have?

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MOTIVATION

• How many cell phones do you have?

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MOTIVATION

• How many laptops do you have?

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MOTIVATION

• Bluetooth?

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MOTIVATION

• How many Access Points here?

21!
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MOTIVATION

• Put all together

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MOTIVATION

• and moving

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MOTIVATION

• How to make absolutely reliable wireless?
• Challenges
• Fading
• Interference
• Shadowing
• Failures
• Mobility dynamic configuration
• Different standards and protocols
• Heterogeneous devices
• Security

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MOTIVATION

• How can this work?
• Cognitive capabilities of terminals
• Collaboration among terminals

Connectivity Broker
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CONNECTIVITY BROKER

• Functional entity that can reside anywhere on the
  network
• Enables terminals to transparently connect to a
  backbone, network or each other
• Supports all modes of operation (managed / ad-hoc
  / p2p) and provides seamless migration from one
  to another

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CONNECTIVITY BROKER

• Supports weak and legacy terminals
• Provides the signaling necessary for control
• Adapts to future standards through
  programmability
• Optimizing utilization of the resources and/or
  cost, under policy rules, rules of engagement,
  security and quality constraints and resource
  constraints

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CB BLOCK

• On all capable devices
• Provides an abstraction layer for applications
• Communication with others is through this block
• Performs CB functions in collaboration with other
  nodes
• Simple devices or legacy nodes might not have any
  CB block

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CB ARCHITECTURE
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Event Manager

• Manages ALL external events
• Coordinate internal events
• Event based tasks
• Periodic tasks
• Priorities
• SendData ReceiveData are external events

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Multi-Radio Resource Manager

• Manage all radio resources
• Carrier
• Channel
• Noise
• Modulation

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Multi-Radio Resource Manager

• Manage QoS requeriments
• Throughput
• Delay or latency
• Delay jitter
• Loss or error rate
• Manage Flow Mobility
• Ensures connectivity
• Mapping Bearers and flows
• Base Station changes

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Bearer Manager

• Manages all bearer resouces (PHY/MAC)
• ESSID
• freq/channel
• sensitivity
• tx power
• link quality
• noise level
• new carrier
• encryption

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Power Manager

• Manages power capacities
• Battery level
• Consumption modes
• Switch on/off modules

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Conectivity Manager

• Initiates the establishment of connectivity
  between nodes
• Manages CB communication
• Interacts with all transport protocols
• Old send and receive data
• Manages name domain and address space

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Security Manager

• Manages security mechanisms
• Different security profiles
• Different security levels
• APP
• NET
• PHY
• Manages keys encryption
• Allocated dynamic profiles

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Network Composition Manager

• CB brain OPTIMIZATION
• Manages network composition
• Interfaces
• Modes
• Reconfiguration
• CB communication
• Non-CB nodes communication
• Centralized or distributed decision

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CB ARCHITECTURE
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SCENARIOS

• Emergency Earthquake
• Use different wireless communication
• Efficient use Football stadium
• Increase spectrum owner
• New user is happy
• Secondary user Eurocup in Yosemite
• Increase spectrum owner
• User is happy

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CASE STUDY I
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CASE STUDY I
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CASE STUDY II
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CASE STUDY II
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OUR TESTBED
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IMPLEMENTED

• Power Manager, Bearer Manager, Event Manager,
  MRRM, CM, NCM, Security Manager
• Interface WIRELESS (802.11)
• Optimization Managed mode Ad-hoc
• Devices Lenovo Laptop, N800

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NEXT STEPS
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NEXT STEPS

• Power Manager, Bearer Manager, Event Manager,
  MRRM, CM, NCM, Security Manager
• Interface WIRELESS (2 interfaces) sensing
  node
• Optimization Routing/Cross layer
• Improve discovery protocol
• Different flows

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FUTURE

• All modules
• Interface Wireless, Bluetooth, Zigbee,
  Wimax(secondary user)
• QoS
• Security
• Distributed intelligence
• New hardware (USRP)

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QUESTIONS?
?
Thanks!
araujo_at_eecs.berkeley.edu araujo_at_die.upm.es
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Policy Profile Registry

• Policy Profile Data base
• Could be used for provided services company
• Through Network Profiles Manager
• Parameters
• User
• Primary
• Secundary
• Emergency
• Rate
• Max
• Min
• Price plan
• Pre-paid, contract

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Properties Registry

• Device properties Data base
• All known/needed devices
• Properties
• Interfaces
• Modes
• Carrier
• Rates
• Memory
• Power
• Processing Capacity

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Network Profiles Manager

• Manages Profile Networks
• Radio resource permission
• Who can do what (company?,state?)
• Primary and secondary users
• Emergency uses
• Questions
• Yes/No questions
• QoS questions

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CHALLENGES

• Optimal utilization of the radio spectrum
• To make the communications cheaper
• Low power

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CB ARCHITECTURE