Health Level in Dynamic Network 101105

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Health Level in Dynamic Network10/11/05

• Paskorn Champrasert
• _at_DSSG

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Health Level

• Health Level
• Resource Availability
• Age
• Freshness

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Unstable Network

• New node is added to the network
• 2) Unstable Node ( probability of failure)
• 3) Stable node

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Time Function age freshness
age
1
freshness
time
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Freshness Value

• New node freshness value 1
• Time goes on
• Refreshment / age of node
• Continue counting even if the node is down
• 0..1

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Freshness Value
1
freshness
time
Node is up
Node is down
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Age

• New node age 0
• Age is absolute value. It is increasing when the
  host is working.
• 0 infinity

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Resource availability

• CPU, Memory, Bandwidth
• This is absolute value
• In the previous papers, we considered only memory
  (64MB)
• Agent uses 5 MB
• Platform uses 20MB

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Health Level Ratio

• Health Level Ratio
• (RAremote RAlocal) / RAlocal
• (Ageremote Agelocal) / Agelocal
• (Freshnessremote Freshnesslocal) /
  Freshnesslocal

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Platform Structure
ID
Age
Attributes
Energy Level
Healthy Level
Host Information
Platform
Run time service
Energy Exchange and Storage
Healthy LevelManagement
Behavior
Communication
Replication
Death
Environment Sensing