A%20message%20oriented%20phone%20system%20for%20low%20cost%20connectivity

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A message oriented phone system for low cost
connectivity

• R.J. Honicky, Omar Bakr, Micheal Demmer, Eric
  Brewer.
• By
• Aalaya Gopala Kolli

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Outline of the Presentation

• Introduction
• Feasibility
• System Model
• Potential Benefits
• Challenges
• Conclusions
• Questions

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Introduction

• Mobile phones usage. Source wikipedia

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Reasons for the new voice message system

• Mobile phones usage increasing in developing
  countries but with limitations.
• - Limited purchasing and low user density
  inhibiting expansion into rural areas.
• - Service purchasing cost for an average
  earning person in countries in Africa.
• This led the authors to develop system based
  mainly on the beeping phenomenon, the
  asynchronous voice messaging.

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How does the system expand well into rural areas?

• Extend effective coverage range by queuing
  messages.
• No need for extension of new technology or
  infrastructure into rural areas.
• Use of current existing infrastructure without
  loss of performance.

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Feasibility of the new system

• Feasibility includes how easy the system could be
  deployed so is adopted by as many users as
  possible
• Two factors that effect feasibility of the system
• User locality
• Unused Capacity

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Feasibility(contd.)

• User Locality
• There is a certain pattern depending on the
  location of the users within a group.
• Data collected from 89 students phone activity
  between Jan 04 to Jun 05.
• Cumulative Distribution of the connections
  handled by the cells.

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User Locality (contd.)
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Feasibility (Contd.)

• Unused capacity
• All mobile phone service systems are made to
  handle peak levels of maximum traffic to ensure
  equal to 100 reliability.
• Data collected from the MIT Trace was used to
  plot peak-to-average calling ratio (PAR) grouped
  by hour per day.
• Plots turn out to be bursty.

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Unused Capacity (Contd.)
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System Model

• System Model for asynchronous Voice messages
• SIM cards with few MB or cards with more storage
  and unique ID for recharging.
• Gap between consecutive polling's for service by
  the phone could be increased which helps save
  battery life.

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System Model (contd.)

• Services
• Normal voice calls
• Asynchronous voice messaging.
• Faster delivery of high priority based messages,
  information subscriptions.
• Deployment Scenarios
• Existing base stations
• New low cost base stations

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Potential Benefits

• Better resource utilization
• Current resources are made to handle the peak
  levels but on average they dont handle that
  much.
• Increased Effective coverage
• Asynchronous messaging extends the effective
  coverage range

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Potential Benefits (Contd.)
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Potential Benefits (contd.)

• Better Perception of Service
• Asynchronous voice messaging hides congestion
  intervals or outages faced by service from the
  user as the messages are queued on the phone.
• Outages cannot be masked for live calls but could
  be for asynchronous voice messaging.
• Cost Reduction
• Asynchronous voice messaging can be charged at a
  very less price.

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Challenges

• User Acceptance
• Carrier Acceptance
• Scheduling and routing messages
• Low cost Base station
• Base station connectivity

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Conclusions some critiques

• A new way for providing communication to extreme
  rural areas.
• Peak demands for capacity could increase and
  reach thresholds because everyone as per the
  authors localization concept would gather at one
  place and download messages.
• Localization for students would obviously be the
  same as they mostly go around in the same campus.
• Voice messages are kind of going on in developed
  countries also like Iphone visual voice mail

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• Sources of images
• Wikipedia, the same paper
• Questions..?