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Aymeric PIERRE 870120-*397 Quentin THIBERVILLE 860411-*339 Mighty Screen Pervasive Computing project
Aymeric PIERRE 870120-*397Quentin THIBERVILLE 860411-*339
Mighty ScreenPervasive Computing project
Aymeric PIERRE Quentin THIBERVILLE
Table of contents
1. Project Description.........................................................................................................................3
2. Requirements Specification................................................................................................................4
2.1 User Characteristics - Actors.........................................................................................................4
2.2 Use Cases and Functional Requirements......................................................................................4
2.2.1 Use cases...............................................................................................................................4
2.2.3 Use case diagram............................................................................................................4
2.2.4 Storyboard.................................................................................................................................5
3. Technologies used..............................................................................................................................6
3.1 NFC...............................................................................................................................................6
3.2 Bluetooth......................................................................................................................................6
3.3 Java...............................................................................................................................................6
4. Benefits..............................................................................................................................................7
4.1 Before NFC....................................................................................................................................7
4.2 With NFC......................................................................................................................................7
5. The application...................................................................................................................................8
5.1 Design...........................................................................................................................................8
5.2 What works..................................................................................................................................8
5.3 What didn’t work..........................................................................................................................9
6. Conclusion........................................................................................................................................10
M7012E Pervasive Computing 2 10/12/2008
Aymeric PIERRE Quentin THIBERVILLE
1. Project Description
The assignment is to develop an application which transfers almost instantaneously the contents (music, photos, films…) of a mobile phone on a computer screen. The application must start by scanning a simply RFID tag with the mobile phone equipped with NFC technology.For this we have to implement a server application on the computer, a client application on the mobile phone, use NFC reader of the phone and Bluetooth protocol to transfer the contents.
Simply put our mobile phone on our PC and let see pictures inside!
M7012E Pervasive Computing 3 10/12/2008
Aymeric PIERRE Quentin THIBERVILLE
2. Requirements Specification
2.1 User Characteristics - Actors
Home UserIt’s the final user for the application. A typical user has no knowledge of computer programming, so the application needs to be as simple as possible.
2.2 Use Cases and Functional Requirements
2.2.1 Use cases
Connection
Participating actors Home user.Entry condition User tags the mobile phone on the RFID tag.Event flow - Application starts on the phone.
- Bluetooth connection established between the phone and the computer.- Contents are transferred.
Exit condition All the contents on the phone are now on the computer
Navigation
Participating actors Home user.Entry condition User uses the phone pad.Event flow - Information sent via Bluetooth.
- The cursor moves on the screen.Exit condition Home user stops navigating.
Disconnection
NormalParticipating actors Home user.Entry condition User tags the phone on the RFID tag.Event flow - Application on the mobile phone sends an End of connection request to
the server.- Application closes the connection.
Exit condition The Application is closed on the mobile phone.
ForcedParticipating actors Home user.Entry condition User go too far away from the computer with the mobile phone in his
pocketEvent flow - The connection is lost between the server and the client, due to the
distance.- Application closes automatically on the phone.
Exit condition Application is closed on the mobile phone.
2.2.3 Use case diagram
M7012E Pervasive Computing 4 10/12/2008
Aymeric PIERRE Quentin THIBERVILLE
2.2.4 Storyboard1) Mobile phone detects PC’s Bluetooth address from the NFC tag. 2) It establishes the connection between both devices.
3) Automatically transfers data and detects services4) Wait for user actions
5) Shutdown application if we sweep tag again
M7012E Pervasive Computing 5 10/12/2008
Aymeric PIERRE Quentin THIBERVILLE
3. Technologies used.
3.1 NFC
NFC is RFID based: Useful contactless connection Short range : 4cm Small storage capacity
Also, it is supported by Nokia, Philips, Sony and 120 organizations since 2004 (semiconductor, mobile device, operator, financial, IT, and services companies)
3.2 Bluetooth
Major and reliable protocol Range : a room Bandwidth up to 1Mb/s
3.3 Java
Reliable programming language with Portability (Nokia, PC, Mac, Linux) Using this kind of language we can move a part of our application from the client to the server without any major trouble. It is very flexible.
M7012E Pervasive Computing 6 10/12/2008
Aymeric PIERRE Quentin THIBERVILLE
4. Benefits4.1 Before NFC
Today, if you want to connect a device -for example a mobile phone- to another device -for example PC B here- you will have to do the discovery step, your Bluetooth will detect all devices and it will be a mess to choose which PC you want to connect.
4.2 With NFCIdea: Do not care about device discovery, which is a boring part of a Bluetooth transfer.
Advantages: - From NFC about the locality of the transmission to read right address- From Bluetooth, because connection range is much important with Bluetooth (a room) than
with NFC (few centimeters)Withdraws:
- Using two technologies means two investments- Need to write PC’s Bluetooth address on the NFC tag
M7012E Pervasive Computing 7 10/12/2008
Aymeric PIERRE Quentin THIBERVILLE
5. The application5.1 Design
On the computer side, we have the MightyScreen class which is the main class. It starts the program, and launches a listener on the Bluetooth device of the computer (using the jsr-082). It controls all the Bluetooth activity when a connection is established.The Gui class create the graphic interface on which we will see the phone pictures (and other media).The DisplayImage class is used to display image in the Gui (to resize the image).In this part we will be able to add other classes for the other functionalities, like a Music class to play music, or a Video class.
On the phone side, we only have one main class, which using the NFC reader of the phone to read Bluetooth address on a NFC tag, and which start the connection and the transfer of the media.
5.2 What works
We succeed to create the Gui on the computer. We simulate a fake Bluetooth connection on the computer to see how the program responds to an attempt of connection. It works, and the program shows an image in the Gui, using the DisplayImage class to resize it.It wasn’t easy, especially for the Bluetooth part: there is a lot of different distribution of JSR 082. Some of them only work on Windows, other only on Linux or Mac, and there are not very stable. Some distributions stable and complete exist, but you have to buy them.We choose the Bluecove distribution.
It was also a tough task to simulate a Bluetooth connection on a computer without Bluetooth device.
M7012E Pervasive Computing 8 10/12/2008
Aymeric PIERRE Quentin THIBERVILLE
5.3 What didn’t work
We got a mountain of problem on the phone part.First, the compilation of the class: we used the Nokia library (because we wanted to use the NFC reader of the Nokia), but for an obscure reason, Netbeans didn’t want to compile the class. After some changes in the Nokia library (by deleting some files), the compilation finally works.
Unfortunately, the program didn’t work on the Nokia emulator. When we launched the program, it was like there was no program to launch (no application available to launch). We suspect an error on our side at first, but it was more complicated. After trying with a simple HelloWorld application, we notice that there was something wrong with the Netbeans compiler. Indeed, when we compile the HelloWorld application using the compiler of the mobility pack (using code line), it works, but when we used the Netbeans compiler, we got the same problem (no application available to launch). So we try to compile with the mobility pack, but as we are not used to use code line, specifying the libraries used and her path..., that doesn’t work (and we had not enough time to see more deeply).
We didn’t succeed to find out what was the problem on the Netbeans compiler, so we couldn’t be able to continue the phone part and to have a demo of our program.
M7012E Pervasive Computing 9 10/12/2008
Aymeric PIERRE Quentin THIBERVILLE
6. Conclusion
This project was very interesting. We discover a lot of new technologies in the course, and with this project (use NFC and Bluetooth technology in a java application was new for us). But as for all new technology, it was hard, very hard, to correctly use them, and to find help on them (NFC is very new).
We encountered two major problems: the lack of time (as we are exchange student, we travel a lot to visit and enjoy Sweden) and the lack of background in Java programming (We never worked on a real java project before).
Our application doesn’t work, but I think that the most important for us is that now we have an experience in a big project, dealing with new technology, with its own difficulties. It will help us someday if we’ll have the occasion to work on java programming.
M7012E Pervasive Computing 10 10/12/2008
