Here are some suggestions to consider moving forward: 1. Focus on implementing Wi-Fi P2P as an alternative to ad-hoc mode since it allows direct connection between Android devices without an access point. This seems like the best option available. 2. For Bluetooth, pairing needs to happen the first time but subsequent connections to already paired devices will be automatic without pop-ups. Consider storing paired device information to skip the initial pairing process. 3. As a fallback, one device could act as a temporary Wi-Fi hotspot for the other to connect to in order to exchange data. Not ideal but may work in some situations. 4. Continue researching if any new methods have emerged to enable ad-hoc

1. TEMPORARY SELECTION OF
SERVER IN CONVENTIONAL
CLIENT-SERVER ARCHITECTURE
FOR DYNAMIC DATA.
14MCS0047_KHUDE ROHAN R.
14MCS0021_PULIGUNDLAABHISHEK
14MCS0021_ABHILASH NAMDEV

2. ABSTRACT
•Now a days a research is still going on how to make the server tends to
non-failure for which more complexity is present as well as extra hardware
is needed for it which implied to expensive architecture.
•We proposed a network architecture where a clients are connected with
each other in a peer to peer manner which is useful to get information from
another client who has latest information when server temporarily
unavailable.
• Hence complexity and expensiveness of enhancing the server can achieved
which will useful in large scale in recent years of information technologies
and organization.

3. INTRODUCTION
•We will build a client as a server through android device by creating
an android application in which a database field is shared among
client and server.
•When server is crashed or in deadlock state then client will handle a
responsibility of server where to send a database field to another
client which is requested for this field.
•The client which acts as a server is called as mirror who has latest
information.

4. PROPOSED
ARCHITECTURE

5. SCENARIOS
We will explain above architecture in 3 steps
1. Client requesting for latest information.
2. The stack is maintained on every client.
3. Server fails, client acts as a server temporarily

6. 1. CLIENT REQUESTING FOR
LATEST INFO.
•Suppose client requests for server for updated information.
•As this availability field is dynamic data; then client frequently
request for this update information.
•Suppose server fails then client wont get latest data from availability
field.
•For being serve consistently the client may overtake to the server
responsibility to serve other clients.
•The responsibility here means providing the availability value which is
updated recently before crashing server.

7. 2. THE STACK IS MAINTAINED ON
EVERY CLIENT.•But how the client will take over the server . . . ?
•Even if the client take over the server; how other client will know that to
which client the request is made. . . . .?
•How other client will known which client has latest information. . . . ?
• For this stack is maintained . . . !
•Stack is used for insert the address of the server and clients but only clients
those who are having latest information.
•During sharing the information with the clients, the server trace their
address and store in the stack after which server address is followed.

8. 3. SERVER FAILS, CLIENT ACTS AS
A SERVER TEMPORARILY
•For every request the stack is needed to maintain because any time
server may crash.
•The server uploads stack on every server, this is needed because if
server gets failed then no other chances of getting address of
temporary server.
• As any client may become temporary server for this every client will
connected using mesh topology.
• When the temporary server is chosen among the set of clients then
further request and response work using peer to peer connection.

9. PLATFORM FOR IMPLEMENTATION
•We will create an application for android device ‘Faculty availability
indicator’ in which we will implement a model for client as a server.
•This application is a just platform were we implement a mirror.
•In this, faculty itself update availability which reflect the availability
field in server database.
•When client is served with latest information then at same time stack
is maintained on each client in which is address of client which having
this information.
•If server fails then android device(client) will take over it who having
latest information.
•Another client who wants this information can take from new server
where address of it is taken from stack.

10. •An application for Android that scans for devices nearby and tries to
connect to them automatically.
•If the other device also got this application installed then it
automatically accepts any connection request it receives.
•When the connection is established it sends back a message which
ensures that it has this app installed so that both can start
exchanging messages automatically.
•The users don't have to allow/deny any of the sending/receiving in
real time.

11. 1. Is there any way of sending messages through Wi-Fi between 2
android devices without the use of internet?
2. Since Ad Hoc is not supported, is there any alternative?
3. In case the answer to 2 is no , then is it possible to make one of
the devices to be an access point so the other can connect to it and
vice versa.
4. As for bluetooth, is it possible to skip or automate the allow/deny
pop up of an incoming connection and the pairing procedure?

12. 1. TO ENABLE ADHOC IN ANDROID
MOBILE
•After making a research about it I found out that Android doesn't
have a native Wi-Fi ad hoc functionality.
•The only way to achieve that is through rooting your device.
•Patching the wpa_supplicant.
•Some other similar methods which are not generic for every device.

13. 2. SINCE AD HOC IS NOT
SUPPORTED, IS THERE ANY
ALTERNATIVE?
•Wi-Fi peer-to-peer (P2P) allows Android 4.0 (API level 14) devices
with the appropriate hardware to connect directly to each other via
Wi-Fi without an intermediate access point.
•Using these APIs, you can discover and connect to other devices when
each device supports Wi-Fi P2P.
•Then communicate over a speedy connection across distances much
longer than a Bluetooth connection.
•This is useful for applications that share data among users, such as a
multiplayer game or a photo sharing application.

14. 3. IS IT POSSIBLE TO USE ACCESS
POINT
As needs even we wanted to NOT use internet, so not being able to
find any other way, for that time I just went with using any local wifi
connection in proximity to connect with.

15. 4. TO SKIP OR AUTOMATE THE
ALLOW/DENY POP UP
•NO, we can’t deny pop-up.
•When two devices connect first time, pairing has to happen.
•And for subsequent connections to already paired devices it will not
ask for confirmation

16. SUGGESTIONS
Please give suggestions by which we can move forward