ACT Audio Conference over ATM Network with TRM

1
ACTAudio Conference over ATM Network with TRM

• Technion - Israel Institute of Technology
• Electrical Engineering Faculty
• Computer Networks Laboratory

Michael Moreinis Michael Maziar
Under the supervision Youval Nahum Remus Koos
2
Project Goals

• Instructions
• Delete sample document icon and replace with
  working document icons as follows
• Create document in Word.
• Return to PowerPoint.
• From Insert Menu, select Object
• Click Create from File
• Locate File name in File box
• Make sure Display as Icon is checked.
• Click OK
• Select icon
• From Slide Show Menu, Select Action Settings.
• Click Object Action and select Edit
• Click OK

• Building the Audio Conference Manager
• Implementation of Server-Client Messages
• Communication Channels
• Client-Server Relationship Structure

3
Description

• Instructions
• Delete sample document icon and replace with
  working document icons as follows
• Create document in Word.
• Return to PowerPoint.
• From Insert Menu, select Object
• Click Create from File
• Locate File name in File box
• Make sure Display as Icon is checked.
• Click OK
• Select icon
• From Slide Show Menu, Select Action Settings.
• Click Object Action and select Edit
• Click OK

• There is a significant need in fast reliable
  communication over computer networks
• One of the communication implementations is AUDIO
  CONFERENCING
• In order to run the AUDIO CONFERENCE convenient,
  the manager should be implemented
• The ATM Network doesnt support reliable
  connection - there is a need for IP control
  connections.

4
Competitive Analysis

• Instructions
• Delete sample document icon and replace with
  working document icons as follows
• Create document in Word.
• Return to PowerPoint.
• From Insert Menu, select Object
• Click Create from File
• Locate File name in File box
• Make sure Display as Icon is checked.
• Click OK
• Select icon
• From Slide Show Menu, Select Action Settings.
• Click Object Action and select Edit
• Click OK

• Others Audio Conferencing tools
• Slow communication
• No manager implemented
• Audio conference with TRM
• Audio Transfer over ATM - fast communication
• TRM - fair management
• Weaknesses of ACT
• No user interface (at this point)
• No additional tools (whiteboard, video etc.)

5
Technology

• Instructions
• Delete sample document icon and replace with
  working document icons as follows
• Create document in Word.
• Return to PowerPoint.
• From Insert Menu, select Object
• Click Create from File
• Locate File name in File box
• Make sure Display as Icon is checked.
• Click OK
• Select icon
• From Slide Show Menu, Select Action Settings.
• Click Object Action and select Edit
• Click OK

• ATM Networks
• fast communication
• large data (audio) - low latency
• TRM - time resource manager
• fairness in time allocation
• no interference to speaker
• IP control connections
• reliable connection (necessary for control)
• standard communication protocol

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Hardware/Software Resources

• Sun Workstations
• ATM Network cards FORE/ATM
• Native ATM API
• SUN Audio tools
• - AudioRecord
• - AudioPlay
• - AudioTool - set the audio devices

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Communication Channels
Another channel is MULTICAST ATM connection from
server to each client
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Request Queue

• Each client may have one request only
• Time allocation is equal to all clients

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Link List of Conference Participants

• New participant - new member of LL is created
  
• Participant is down - member of LL is deleted,
  Request Queue is updated

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Client Software

• Each Client runs number of threads
• The treads cannot be switched by user
• Need for data locks

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Server Software

• Audio Buffer
• Global Data Locks

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Server-Client Messaging

• Client Requests
• demand
• remove
• exit
• Client Messages
• start
• stop
• exit
• conference state messages

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Server-Client Messaging

• Server Statistics
• Clients connected
• Request queue
• Server Timing
• Set-up the conference
• Conference timing
• Conference state messages

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Conclusions

• Audio Devices
• Easy to implement
• Low quality
• High Latency
• ATM Networks
• Fast
• Unreliable connection
• Convenient for large data transfer
• TRM
• Improves the performance
• Fairness Convenience
• Order in Conference