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Comprehensive Design Review

February 12, 2010Team Zink

Nicholas Cipriano, Ali Jameel, Jeremy Mestancik, Brian Simakauskas

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Overview

Our advertising system allows advertisements to be scheduled and uploaded over the Internet

Advertisements are automatically sent to their corresponding buses

Ads are displayed based depending the current time and location of each bus

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Block Diagram

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Website

Allows users to log in, view scheduled ads Displays the correct schedule for a given date

and bus route• schedule.txt contains all dates for reduced schedule and

no service

User can choose individual bus runs to advertise • During peak hours, buses run frequently – Users will

select time ranges rather than bus runs

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Homepage

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Schedule Page

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Client update_schedule.sh daemon

At regular intervals, bus connects to server• Connection requires no password

Bus retrieves updated schedule.txt file from web server• Updated file replaces the old

Bus checks if filenames exist in local memory• If not, bus downloads ad from server

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Google Map API

A map displays the bus route on the website

User is able to click points on the map, and the distance between those points is the ad distance

The selected interval is highlighted, for ease of use

The map displays the estimated time and distance of an interval

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New Maps Update on Monday

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Ad Displaying

The scheduling information for each ad is parsed into structs called ads

These structs hold all the information relevant to displaying an ad

A struct is also constructed for the GPS coordinates

Having two structs makes comparing values and performing operations much more elegant

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Ad Displaying

For each GPS coordinate, the distance from an ads start coordinates and end coordinates is made

The Haversine function is used to calculate this distance

When the Haversine function returns a distance that is in a certain range, the ad is either displayed or turned off

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For FDR

Ad displaying priority

Ad scheduling priority

Default advertisement display

Full wireless communications

Bus communication with web server rather than host computer