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Copy of Torrent
1
- Where it all started
- Project Description
- Design
- Design Options
- GUI of App
- Things we learnt
- Concluding Remarks
Where it all started
Google comes up with really cool stuff -
Idea !! Lets bring Torrent to Android
- What we did
- why we did
Network Connection
File Transfer
Any Questions?
Thank you
Torrent on Android
Sagar Chhabria
Yeshwanth Cherukuru
Babu Vatti
Design Options
few known bugs
- Reconnection using Wifi Direct
File request options
Message format
Length of the message
- Sequential
- Random
- Rarest first
Offset value
L1
L2
L3
Actual content of the message
Message type
Seed
Header size - 12 bytes
Message size - 512 bytes
Design
Bitmap Vs Offset
Get Request & Search Request
Offset
Bitmap
- peer is not ready to download right away
Each segment requires an individual request
Only 1 request is needed for getting the entire message
- Search using keywords.
Right decision in our case. Otherwise it will destroy the core idea of our project
Discover Peers
Intent - Wifi_p2p_peers_changed
What happens if the file is too big ?
Action - Request peers
On peer available
Action taken - Connect
Intent - Wifi_p2p_connection_changed
Action - Request connection info.
On connection info. available
Next 10 min
Client Socket
Server Socket
Start File Transfer
Socket Created
- Different from torrent
Get input from user for finding a file
- Response contains file metadata info
Got a response and inserted it in requestList
Start Downloading
No
Another file download in progress
Download File
Start
Yes
- Checks for already asked segments
Is any other file Queued
File Done
Find a random sequence of a file
No
Found
Stop
Send Request(s)
Wait for response
Wait for your turn
- Queuing mechanism
Direct
GUI of App
Home page of the App
Things we learned from this project
Direct
- Use of new technology -
- Android App development.
Project Description
Congratulations to all the graduates
Future Work/ Extensions
An android application implementing P2P file transfer loosely based on BitTorrent
...and something more
1. Avoiding Free - Riding : Depending on the seeding to leeching ratio we can segregate the peers into various groups
2. Completing downloads on the go that were being downloaded on the computer.
Stockholm
(cc) photo by Metro Centric on Flickr
(cc) photo by jimmyharris on Flickr
Budapest
Smart phones emulating functionality of Computers.
Higher transfer speed (30 times faster than Bluetooth).
Greater transfer range (100-150m).
Files transfer on the go.
Increasing Piracy
(cc) photo by Metro Centric on Flickr
(cc) photo by Franco Folini on Flickr