Wireless Intercom Functional Layer: An Implementation

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Wireless Intercom Functional Layer An
Implementation

• Arvind Thirunarayanan
• Jan Rabaey

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Possible Intercom Model
Cord to speakers mounted on headset
Handheld Device
Push button controls
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Abstraction Layers
LEVEL 1 (topmost) High level client programs
Functional Layer

• LEVEL 2
• Authorization protocols
• Communication / Service requests

Architecture Layer
Next level
Lower layers
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Functional Layer

• Two functions
• Authorization handling and protocols
• Communication and service requests

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Authorization handling/ protocols

• Two possible configurations
• Username/password configuration
• User authorization codes

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Communication/ Service requests

• Three types of requests
• Unit to Base Station
• One-way Communication
• Two-way Communication

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Unit to Base Station

• Unit activation / authorization processing /
  initialization requests
• User configuration changes / updates / status
  requests
• Communication requests
• Disconnecting / unit deactivation

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One-way Communication

• Emergency / Override broadcasts
• updates, data distribution
• alarms, emergency interrupts
• Group broadcasts to all or selected units

Base Station
Individual Units
Broadcaster
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Two-way Communication

• Duplex communication between 2 or more units

Base Station
Individual Units