Re: Device Discovery?

[stoker]

Hi Grad,

It's important to understand that SPAN uses the built-in Wi-Fi chip in your Android device. The Wi-Fi can work in different modes. Usually it works on "managed" mode when it talks to an access point. SPAN puts the chip in "ad-hoc" mode to work peer-to-peer.

1. A SPAN device periodically broadcasts a hello message over the Wi-Fi. Other devices nearby hear the broadcast and know that there is a peer in range.

2. The Android OS does not support ad-hoc mode. SPAN works at the native layer below the OS closer to the kernel. Thus, when SPAN enables ad-hoc mode it tells the Android OS that the Wi-Fi is disabled. The Wi-Fi will appear to be off in the Settings app. This is so that SPAN can take control of the Wi-Fi hardware without the Android OS interfering or causing problems. 

3. Sorry, I have no documents that I can share with you. Your best bet is to review the posts on the following sites:

https://groups.google.com/forum/#!forum/spandev

https://github.com/ProjectSPAN/android-manet-manager/issues

- stoker

On Thu, Sep 4, 2014 at 12:10 PM, Student <lavan...@gmail.com> wrote:

Hi Stocker,
I am a graduate student and I have to implement AODV Protocol and try to implement some additional feature apart from sending message. I am trying to understand the MANET Manager source code. I am new to the android development so I am not able to fully understand the flow without documentation and having these naive questions.

1. I am not able to understand how the devices are discovered ?
2. When the ad-hoc mode is on, WIFI is turned off as per my understanding. IS my understanding correct?
3. Is there any documentation to understand the architecture of the project little faster so that I can plan to start with my implementation and spend more time on new feature.

Please clarify them. Thanks !!!


-- GradStudent

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