Connectivity – school, community and the internet (Michail Bletsas)
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Transcript of Connectivity – school, community and the internet (Michail Bletsas)
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ONE LAPTOP PER CHILD
This works are licensed under a Creative Commons Attribution 2.5 License.
One Laptop per Child
Connectivity & Collaboration
May 20, 2008
One Laptop per Child
![Page 2: Connectivity – school, community and the internet (Michail Bletsas)](https://reader035.fdocuments.in/reader035/viewer/2022062701/5538f7534a795971788b4871/html5/thumbnails/2.jpg)
ONE LAPTOP PER CHILD
This works are licensed under a Creative Commons Attribution 2.5 License.
PrinciplesLearning happens by interacting as much as it
happens by teaching => child2child as important as child2internet
![Page 3: Connectivity – school, community and the internet (Michail Bletsas)](https://reader035.fdocuments.in/reader035/viewer/2022062701/5538f7534a795971788b4871/html5/thumbnails/3.jpg)
ONE LAPTOP PER CHILD
This works are licensed under a Creative Commons Attribution 2.5 License.
Our approach
Standard WiFi network adapter Mesh Networking built on top of that
![Page 4: Connectivity – school, community and the internet (Michail Bletsas)](https://reader035.fdocuments.in/reader035/viewer/2022062701/5538f7534a795971788b4871/html5/thumbnails/4.jpg)
ONE LAPTOP PER CHILD
This works are licensed under a Creative Commons Attribution 2.5 License.
Our approach
Collaboration software (middleware, applications and UI)
![Page 5: Connectivity – school, community and the internet (Michail Bletsas)](https://reader035.fdocuments.in/reader035/viewer/2022062701/5538f7534a795971788b4871/html5/thumbnails/5.jpg)
ONE LAPTOP PER CHILD
This works are licensed under a Creative Commons Attribution 2.5 License.
OLPC Mesh Design Goals
low power consumption as transparent as possible to applications based on standards
Connectivity/Range
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ONE LAPTOP PER CHILD
This works are licensed under a Creative Commons Attribution 2.5 License.
XO Networking Architecture
AMD LX700 CPU
Marvell 8388 SoC Radio
USB 2.0
Bus
Layer 2: Frames
Layer 3: Packets
![Page 7: Connectivity – school, community and the internet (Michail Bletsas)](https://reader035.fdocuments.in/reader035/viewer/2022062701/5538f7534a795971788b4871/html5/thumbnails/7.jpg)
ONE LAPTOP PER CHILD
This works are licensed under a Creative Commons Attribution 2.5 License.
OLPC Collaboration Middleware
Application“Activity”
Telepathy/Presence
API
Telepathy/Presence
Gabble Salut
802.11S802.11B/GEthernet
Middleware
ExternalJabberServer
LocalMesh
Network
![Page 8: Connectivity – school, community and the internet (Michail Bletsas)](https://reader035.fdocuments.in/reader035/viewer/2022062701/5538f7534a795971788b4871/html5/thumbnails/8.jpg)
ONE LAPTOP PER CHILD
This works are licensed under a Creative Commons Attribution 2.5 License.
Mesh Network Gateways (portals) Mesh portals
connect laptops to servers and an Internet connection
![Page 9: Connectivity – school, community and the internet (Michail Bletsas)](https://reader035.fdocuments.in/reader035/viewer/2022062701/5538f7534a795971788b4871/html5/thumbnails/9.jpg)
ONE LAPTOP PER CHILD
This works are licensed under a Creative Commons Attribution 2.5 License.
Collaboration
The ability of students to share documents and directly interact with one another
Requires a network connection between the student’s laptops:
Traditional Wireless (802.11b/g) Mesh Wireless (802.11s) Possibly long distance
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ONE LAPTOP PER CHILD
This works are licensed under a Creative Commons Attribution 2.5 License.
Mesh vs. WiFi
The wireless mesh (802.11s) is an extension of traditional WiFi (802.11b/g)
Both use the same radio spectrum 3 usable channels around 2.4GHz
Wireless mesh devices (the laptop) interoperate with WiFi devices
Mesh does not replace WiFi (it extends it) WiFi should be used at Schools
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ONE LAPTOP PER CHILD
This works are licensed under a Creative Commons Attribution 2.5 License.
School WiFi
One or more WiFi (802.11b/g) access points, connected to a central switch and school server
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ONE LAPTOP PER CHILD
This works are licensed under a Creative Commons Attribution 2.5 License.
Collaboration
Presence is the ability of students to “see” if other laptops are connected to the network
Collaboration is the ability of students to share activities and documents they’ve created.
Presence and Collaboration work over any network, not just a Mesh network
![Page 13: Connectivity – school, community and the internet (Michail Bletsas)](https://reader035.fdocuments.in/reader035/viewer/2022062701/5538f7534a795971788b4871/html5/thumbnails/13.jpg)
ONE LAPTOP PER CHILD
This works are licensed under a Creative Commons Attribution 2.5 License.
Cerebro
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ONE LAPTOP PER CHILD
This works are licensed under a Creative Commons Attribution 2.5 License.
Do it yourself
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ONE LAPTOP PER CHILD
This works are licensed under a Creative Commons Attribution 2.5 License.
Active Antennas