The The MuseumMuseum ProjectProject

Yoav Gvili & Asaf Stein

Supervisor :

Alexander Arlievsky

IntroductionIntroduction

• The museum project idea is to supply The museum project idea is to supply museum visitors with a private guide to museum visitors with a private guide to guide them through their museum tour.guide them through their museum tour.

• Every visitor of the museum will be able to Every visitor of the museum will be able to rent a P.D.A at the entrance.rent a P.D.A at the entrance.

• From this moment the visitor (our user) can From this moment the visitor (our user) can interactively use the P.D.A as his private interactively use the P.D.A as his private guide.guide.

Product AdvantagesProduct Advantages

•A personal guide for each user.

•Dynamic.

•Interactive.

•Modular.

Project GoalsProject Goals

• Research - Blue Tooth.Research - Blue Tooth.

• Is it possible?Is it possible?

• Implementation of suitable server – Implementation of suitable server – client & Data Base application.client & Data Base application.

The Project demandsThe Project demands

• Client features:Client features: The client will be able to get the following The client will be able to get the following

services: services:

- - MapMap: a map of the museum rooms + The : a map of the museum rooms + The client’s current position. client’s current position.

– RoomRoom: subject of room + links to exhibits.: subject of room + links to exhibits.– ExhibitsExhibits: picture + text.: picture + text.– General informationGeneral information: about the Museum and : about the Museum and

its facilities.its facilities.– SMSSMS: connections client-to-client, client to : connections client-to-client, client to

group.group.– Tour selectTour select: Choose a tour by field of interest.: Choose a tour by field of interest.

• Server FeaturesServer Features::

- The server will support all the client’s The server will support all the client’s feature.feature.

• Management & maintenance featuresManagement & maintenance features::

- Map control: maintenance of map feature.- Map control: maintenance of map feature.

- Room control: Add Room , Remove Room , - Room control: Add Room , Remove Room , Modify Room.Modify Room.

- Exhibit control: Add Exhibit , Remove - Exhibit control: Add Exhibit , Remove Exhibit , Modify Exhibit.Exhibit , Modify Exhibit.

- Groups: Add Group, Add Member, Remove - Groups: Add Group, Add Member, Remove Group, Remove Member. Group, Remove Member.

Project ArchitectureProject Architecture

• The way to achieve the needed The way to achieve the needed services is to build a wireless services is to build a wireless connection between the P.D.A’s (the connection between the P.D.A’s (the Users) and the museum server.Users) and the museum server.

• The sever holds a Data Base with all The sever holds a Data Base with all relevant information and manage relevant information and manage connection with the P.D.A’s (the connection with the P.D.A’s (the clients).clients).

Application Application Server & Server & Http server Http server are neededare needed

Every room may Every room may contain one or contain one or more wireless more wireless

pico – nets. pico – nets.

Pico net

PDAPDA

PDA

Hub

Pico net

PDAPDA

PDA

Hub

Server Mainframe

LAN

HTTPserver

Museumserver

Bluetooth units of all Rooms are connected to LAN

Every client has a Bluetooth unit

BluetoothBluetooth

Flow chart for client modes of operation in the pico-net

Park M ode

N o R equest forService wait Tout

EnteringActive M ode

R equest forService

C lient fin ished R equest

S ystem N otB usy continue

gettingservice

S ystem isB usy increase

S ervieC ounter

C ounter < M ax_A loud

C ounter>M ax_A loud

C lien t m ade request fo r service

Research Main Conclusions Research Main Conclusions •The piconets will work in the Master – Slave format.•The static devices will be Masters, the clients will be Slaves .•Direct communication between slaves will not be allowed.•Each piconet build of one Master & 7 slaves.•Each piconet can hold up to ~200 clients in Park Mode (like sleep).•It is possible for a few piconets to work in the same room.

Research Main Conclusions Research Main Conclusions (cont.)(cont.)

•Each client will get it's own IP number on the net.

•The client will get a new IP on each time it will become an active member of a piconet.

•The static device (Master) will assign the IP for the client.

•Masters of each Room will have fixed IP numbers that belongs only to the specific Room.

Research Main Conclusions Research Main Conclusions (cont.)(cont.)• In addition to IP each client will get a

static ID (that will stay the same during all the visit).

•*** It is advisable to have a central unit for every few rooms in order to decrease the transmission over the net.

•This unit will supply Data that deals with the few neighbor rooms.(We repeatedly supply this data all the time with no changes).

Ethernet vs. BluetoothEthernet vs. Bluetooth

Bluetooth : Bluetooth : • 1 M bit/sec1 M bit/sec• Wireless connectionWireless connection• 7 users per pico net (max).7 users per pico net (max).• P(Error)P(Error)

Ethernet :Ethernet :• 10 / 100 M bit/sec10 / 100 M bit/sec• Point to point connectionPoint to point connection• Number of clients limited by connection pointsNumber of clients limited by connection points• P(Error)P(Error)

Http ServerHttp Server

• Since a part of the client’s GUI (touring the Since a part of the client’s GUI (touring the museum) is a Web Browser - > an Http museum) is a Web Browser - > an Http server is needed to the project.server is needed to the project.

• The HTTP server is a regular http server The HTTP server is a regular http server that provides data on demand. that provides data on demand.

• On initialization the server must be set the On initialization the server must be set the root path for the museum web pages.root path for the museum web pages.

• All the other data is a regular HTTP server All the other data is a regular HTTP server data No special attributes.data No special attributes.

Application Application Server Server DesignDesign• This Server This Server

manages manages communicatiocommunicatio

n with all n with all clients.clients.

• It is basically It is basically divided into divided into three layers:three layers:

- ApplicationApplication- Routing Routing - COMCOM

Application layerMuseum manager

Routing Layer

COM Layer

LAN

Connectionhandler

Data Base

Clienthandler

Clienthandler

Data BaseData BaseData base structure

Data base

Client hash Room hash IP hashGroup hash

Struct has the followingfields:- name- group number- pointer to first client- number of PDA’s in group

Struct has the followingfields:- IP- room number- pointer next IP in room- pointer next IP in Hash

The Struct has the followingfields:- name- room number- pointer to first IP in room- List of neighbors- exist

Struct has the followingfields:- name- group number- pointer to IP- number of PDA- Message fifo & mutex for it- socket and managementflags for it- group index- current IP- next member in group

bla

Client DesignClient Design

• The client The client is also is also divided divided into three into three layers:layers:

- Application- Application

- Context- Context

- COM- COM

Application layer

Context manager

COM layer

WAN - Pico net

SendFIFO

ReceiveFIFO

Connection Connection stepssteps1. connect to 1. connect to ‘wall’. ‘wall’. 2. get IP.2. get IP.3. connect to 3. connect to museum museum server. 4. Get server. 4. Get waiting waiting messages or messages or Group info Group info response.response.5. Browsing. 5. Browsing.

Pico net

PDAPDA

PDA

Hub

Pico net

PDAPDA

PDA

Hub

Server Mainframe

LAN

HTTPserver

Museumserver

The Client’s CacheThe Client’s Cache• The cache is usedThe cache is used

By the client’s By the client’s ‘Browser’.‘Browser’.

It holds the recent It holds the recent HTML files that HTML files that were visited by the were visited by the client . client .

• It also support the It also support the option to browse option to browse BACK.BACK.

HTMLpage

Image Image Image

HTMLpage

Image Image Image

HTMLpage

Image Image Image

HTMLpage

Image Image Image

Cacheentry

Cacheentry

Cacheentry

Cacheentry

CommunicationCommunication

• In our project all the communication works In our project all the communication works

threw LAN.threw LAN.

• The Protocol we use is TCP/IP.The Protocol we use is TCP/IP.

• In order to make the connection between In order to make the connection between

clients and application server possible we had clients and application server possible we had

to create a specific protocol for ourto create a specific protocol for our

application.application.

The Application ProtocolThe Application Protocol

• This protocol is a packet protocol.This protocol is a packet protocol.

• It is used mostly for clients requests from It is used mostly for clients requests from server:server:

- Establish client / server connection.- Establish client / server connection.

- Close the above connection.- Close the above connection.

- Send a text message request.- Send a text message request.

- Room information request.- Room information request.

- Group information request.- Group information request.

The Packet Format:The Packet Format:Basic Message

command(long) PDA id(long) Message length(long) Additional data

Text Message

Additionaldata = Number of

recipientsID of

recipient 1ID of

recipient 2 ... Text Message

Group info resp Message

Additionaldata = Number of

MembersID of

member 0Name of

member 0 ... ID ofmember N

Name ofmember N

Room info resp Message

Additionaldata = Room

number

Project AlgorithmsProject Algorithms

• Client Client connectioconnection and n and receive receive algorithmalgorithm

Open connection

Activate MessageSender

Listen For a newMessage

Disconnected ?

Am I connected?

No

Yes

Add Message toreceive FIFO

• Client Send Client Send message message algorithmalgorithm

Recived message tosend

Add message to sendFIFO

Activates messagesender

Send Message andremove it from send

FIFO

Am I connected?

Finish

YesNo

messagesender

• Client connection to ServerClient connection to Server

Start server

Listen On socket

Received a newconnection

No

YesStart thread

of clienthandler

(ClientRun())

Active listen module(ActiveListenning())

• Client Client handler handler AlgorithAlgorithmm

Start client handler

Receive Messageheader

Is in header incorrect size?

If client Notinitiated exit elseDisconnect client

and exit

NoGet client and

message info fromheader

Yes

Is clientInitiated

set client statusconnected in Data-base and start theclient Messenger

No

Get MessageAdditional data Yes

Exit Thread

Got Data O.K. ?

No

Process MessageYes

• Message Message handling handling AlgorithmAlgorithm

ReceivedMessage

Case on message:Collect room infofrom Data Base

Room info

Text message

Build a group inforesponse message

Group info

Finish

Unknown

Build a room inforesponse message

Add the messageto the requestor

FIFO and activateit messenger

For each target inthe text message

targets

Make a copy of theoriginal message

Add the messageto the target FIFOand activate it’s

messenger

End loop

Add the messageto the requestor

FIFO and activateit’s messenger

Delete originalmessage

GUIGUI

• The Administrator manages the adding The Administrator manages the adding and removing of groups and single clients, and removing of groups and single clients, he can add and remove a group, add client he can add and remove a group, add client to a group, add or remove a single client to a group, add or remove a single client group. group. The Administrator cannot The Administrator cannot change part fo the group after the group is change part fo the group after the group is created.created.

• The Administrator have the following The Administrator have the following panels to manage grouppanels to manage group

1.Activates the Add new group dialog1.Activates the Add new group dialog

2.Activates the Add single client dialog2.Activates the Add single client dialog

3.Activates the Remove group dialog3.Activates the Remove group dialog

4.Activates the Remove single client dialog4.Activates the Remove single client dialog

5.Quit program5.Quit program

•application main windowapplication main window

1

2

5

3

4

Add new group dialog

in this dialog you can add a new group to the data base with all its clients

Add single client dialog

Remove group dialog

Remove client dialog

Client’s GUIClient’s GUI

Client main screen

•A link to the tour select page

•Opens “new Messages” dialog to write a new message if the client is a single client group this dialog is disabled.

Client’s GUIClient’s GUI•Opens “Read Messages” dialog to read new incoming message. if the client is a single client group or no messages to read this dialog is disabled.

•Quit program.

•“Room Info” to get local room info

In every room the user Will get an over view of the room’sExhibits + links for more informationBy his demand.

The user will get a few optionsBy links:

To see a map

Go back to previous page

Select a different tour

Writing & sending Writing & sending messages:messages:

1

2

3

4

7 56

a

b

c d

What did we learn?What did we learn?

– Bluetooth ProtocolBluetooth Protocol– MFC ProgrammingMFC Programming– Software development in visual & Software development in visual &

embedded studio environment.embedded studio environment.– Network Programming (Sockets etc.) Network Programming (Sockets etc.) – Windows NT/2000 OSWindows NT/2000 OS– Windows CE OSWindows CE OS– GUI ProgrammingGUI Programming– Using & configuration of P.D.A’sUsing & configuration of P.D.A’s

The End The End