OK. I have figured it out. Here is a primer. Following the primer, I will discuss some detail:
- Android Beam - the NFC communications standard for file transfer on devices that use the Android Operating System
- S Beam - the Samsung Variant of Android Beam
- WiFi Direct - yet another network/protocol alliance for direct device-to-device communication for file transfer
Now the details and examples:
* First you must turn on NFC for any "beaming" function.
* Next, if you are sharing a file (transfer) with another Android device that is NOT a Samsung Galaxy S3 phone (currently... will change in the future?) that supports Android Beam, you then turn on Android Beam on both devices and follow the "beaming" method.
* If you are sharing a file with another Samsung Galaxy S3 phone, then you turn on S Beam on both phones and follow the beaming method. The S3s support only S Beam between S3 devices -- one would expect that this will change with future Samsung devices.
* Complexity Warning - if both devices support WiFi Direct, the beaming function will want to transfer via WiFi direct... especially for larger file types - music, photos, videos, etc. It's more robust and a faster protocol. Beam is around the same speed as BlueTooth (another mechanism and another story).
* WiFi Direct is another methodology (it's not NFC based beaming) of allowing devices to both Share and Transfer files (files are files... documents, songs, music, contacts, videos, code, what have you...). The goal behind WiFi direct, as compared to DLNA or AllShare (Samsungs DLNA variant) is that devices that are WiFi Direct compliant need no WiFi Access Point host. AllShare does require a host WiFi network to work. In other words, the devices create an ad-hoc connection between each other using WPA2 security standards. You can be up on Mt. Everest and use a WiFi direct device (your S3) to create a WiFi host for other WiFi capable devices to share and transfer files. In short, WiFi direct is the bigger, faster, badder way of transfering and sharing files especially over distance (compared to NFC where the phones have to be touching to start and close together to finish the transfer). Devices using WiFi Direct need to be in WiFi proximity but not next to each other or touching. Finally, you can create a WiFi Direct Group and share files or transfer to multiple devices simultaneously as long as all are participating in the group with a secure access defined by the WiFi direct host. Again, all this is created Ad-hoc -- on demand at the time you desire to host the connections.
I think this pretty much sums it up. Got two S3s? S Beam. Got two Androids where one is not an S3? Android Beam. Got WiFi device(s) that want to either share or transfer files and the files are bigger and you don't need a quick hit but have a more robust need and/or don't have a WiFi network around? WiFi Direct.
If you have questions... let me see how this community can help.
AGE