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Internet in your pocket. Big network in small devices. Marcin Michalak michalak@helios.iihe.ac.be. Agenda. PDA – Personal Digital Assistant Wireless networks: types and specs: WLAN Bluetooth GPRS Equipment list Experiments: Bluetooth/GPRS/IrDA/IPv6 audio/video/web browsing/chatting.

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internet in your pocket

Internet in your pocket

Big network in small devices

Marcin Michalak

michalak@helios.iihe.ac.be

STC Seminar – May 24th

agenda
Agenda
  • PDA – Personal Digital Assistant
  • Wireless networks: types and specs:
    • WLAN
    • Bluetooth
    • GPRS
  • Equipment list
  • Experiments:
    • Bluetooth/GPRS/IrDA/IPv6
    • audio/video/web browsing/chatting

STC Seminar – May 24th

ipaq what is it
product from COMPAQ (HPQ)

206 MHz strongARM processor

64MB RAM, 32 MB Flash ROM

IrDA, Bluetooth

320x240 colour touch screen

audio in/out

secure digital (SD) card slot

expansion modules

VGA output expansion (presentations...)

iPAQ – what is it?

STC Seminar – May 24th

wireless technologies overview
Wireless technologies - overview
  • WLAN – Wireless Ethernet (802.11b)
  • Bluetooth – short range, small devices
  • GPRS – extension of mobile networks

STC Seminar – May 24th

wireless lan
Wireless LAN
  • Wireless Ethernet
  • up to 11Mbps
  • IEEE 802.11b standard
  • Access points + PCI/PCMCIA cards

working?

STC Seminar – May 24th

bluetooth overview
Bluetooth overview

Wireless connection for all mobile devices

  • small, cheap & simple(goal:1 unit<$10)
  • low power consumption (batteries...)
  • 2.4 GHz ISM band (unlicensed)
  • 79 channels, frequency hopping
  • speed up to 721 kbps
  • open standard
  • supported by 1000s of manufacturers
  • (not just) IrDA replacement

STC Seminar – May 24th

slide7

Frequency Hopping principle

frequency

79 channels

time

1600 hops / second !!!

STC Seminar – May 24th

slide8

Piconet

  • Star Topology
    • 1 Master, up to 7 active slaves
    • Unlimited number of parked slaves
  • Master:
    • determines hopping scheme and timing
    • Administers piconet (polling)
  • Logical Channels
    • Asynchronous, packet oriented - ACL
    • Synchronous, connection-oriented (voice, slot reservation) - SCO

7

5

4

P

6

M

1

3

P

P

2

Master

M

parked slave

P

active slave

standby

n

STC Seminar – May 24th

slide9

Scatternet

  • multiple piconets
  • overlapping coverage areas
  • one master / piconet
  • master for one piconet may be slave for another piconet
  • each piconet has its own hopping scheme

M

M

M

How many piconets?

STC Seminar – May 24th

slide10

Scatternet

  • multiple piconets
  • overlapping coverage areas
  • one master / piconet
  • master for one piconet may be slave for another piconet
  • each piconet has its own hopping scheme

M

M

M

STC Seminar – May 24th

bluetooth equipment
Bluetooth equipment
  • built in: notebooks, PDAs, mobile phones, cameras, pens…
  • PCMCIA cards, USB adapters, motherboards
  • printer adapters
  • hands-free

STC Seminar – May 24th

bluetooth applications
Bluetooth - applications
  • connecting devices in short range:
    • hands-free to phone
    • transfer pictures from camera to PC/printer
    • connect to Internet
    • phone2phone: send business card
    • cordless phone (like DECT)
    • send/receive files (LAN)
  • how? -> SDP – service discovery protocol

http://www.ics.agh.edu.pl/~mmich/ - Master’s Thesis

STC Seminar – May 24th

slide13
GPRS

General Packet Radio Services

  • extension to GSM network
  • packet-based transmission
  • volume-based charging
  • always-on connectivity
  • multi-slot operation
  • up to 171 kbps download

STC Seminar – May 24th

gprs what s the trick
GPRS – what’s the trick?

2G: GSM: 8 Time slots (TS)

1

2

3

4

5

6

7

8

one user = one time slot = one call

speed: 9.6 kbps (14.4 kbps extended)

2,5 G: GPRS: 8 Time slots (TS)

1

2

2

3

4

5

6

6

7

7

8

one user = many slots assigned on demand

speed: up to 171.2 kbps (8 x 21.4 kbps)

STC Seminar – May 24th

slide15

What we have:

Ericsson T39m with GPRS & Bluetooth

iPAQ 3870 with Bluetooth and Linux

3Com Bluetooth PCMCIA card

3Com Bluetooth USB adapter

notebook with Linux and Windows

iPAQ 3660

with Pocket

Windows

Compaq

WLAN PCMCIA card

Compaq

WLANAccess Point

STC Seminar – May 24th

demos list
Demos - list
  • basic connectivity: GPRS
    • Windows with IrDA/Bluetooth (notebook/iPAQ)
    • Linux with Bluetooth (iPAQ)
  • web browsing (iihe, ngnlab, ...)
  • audio & video transfer
    • Windows: Media Player + PocketTV
    • Linux: vic (IPv6), rat + scream (audio), gaim
  • IPv6 – setting up the Freenet6 tunnel (iPAQ)
  • iPAQ Linux applications

STC Seminar – May 24th

task 0 easy notebook with gprs
Task 0 (easy): Notebook with GPRS
  • always-on connectivity
  • like Dial-UP (speed as well...)
  • IrDA or Bluetooth
  • PIN: 1111
  • let me do it myself...

www

mail

Internet

IrDA

GSM/GPRS

network

STC Seminar – May 24th

task 1 ipaq to gprs
iPAQ:

turn on iPAQ 3660

tap the flag

choose ‘Settings’

tap ‘Connections’ tab

tap ‘Connections’ icon

make sure ‘gprs proximus’ is chosen

Phone:

Extras/4 Infrared Port/On

place it next to (above) iPAQ

iPAQ:

tap ‘Connect’ button

wait... and use

Task 1: iPAQ to GPRS

STC Seminar – May 24th

task 2 use and enjoy
web browsing: Internet Explorer

multimedia:

playing MP3 files

Windows Media Player (4FM, videos)

PocketTV – live feed

check e-mail, chat, ...

Task 2: Use and enjoy

Note: check phone battery after usage (infrared)

STC Seminar – May 24th

ok let s get serious
OK, let’s get serious...
  • Linux on iPAQ 3870 (X-Windows incl.)
  • Bluetooth working (uffff....)
  • GPRS connection via Bluetooth
  • Bluetooth connection via notebook

GPRS

STC Seminar – May 24th

task 3 connect to phone gprs
Task 3: Connect to phone/GPRS
  • prepare the phone
  • run:

rfcommd –n –f /etc/rfcommdGPRS.conf na 00:80:37:11:8f:ed

short: ./GPRS

  • see the output
    • on the phone (slide down)
    • on iPAQ
  • remarks:
    • Bluetooth emulates serial connection (like IrDA)
    • GPRS service: extra request @operator needed

STC Seminar – May 24th

task 4 ipv6 connectivity
Task 4: IPv6 connectivity
  • Freenet6.net service – free & everybody
  • works on Windows NT, 2000, Linux, FreeBSD
  • your computer may also be a router!
  • run on iPAQ:

tspc

  • run: ifconfig
  • run:

ping6 www.kame.net

ping6 www.6bone.net

ping6 www.ipv6.iihe.ac.be

STC Seminar – May 24th

ipv6 tunnel how it works
IPv6 tunnel – how it works?
  • connection to Internet IPv4 via Bluetooth & GPRS
  • IPv6-over-IPv4 tunnel to Freenet6
  • connection to EURODEMO through Canada...

IPv6

IPv6-in-IPv4 tunnel

Internet

Freenet6 server

@Viagenie.ca

GSM/GPRS

network

STC Seminar – May 24th

task 5 bluetooth connection
Task 5: Bluetooth connection
  • notebook as a router
  • Bluetooth USB Adapter
  • connection up to 721kbps
  • run:

./NB

tspc (another IPv6 tunnel)

  • check if works (ifconfig, ping)
  • next step is...

STC Seminar – May 24th

task 6 applications
Task 6: Applications
  • web browsing with dillo
  • playing audio – scream
  • listening to the radio online
  • vic and rat over IPv4/IPv6
  • gaim – chat
  • and more...

research can be fun!

STC Seminar – May 24th

dillo web browser
dillo – web browser
  • Menu/Viewers/dillo
  • F/Open URL...
  • browse your favourites

STC Seminar – May 24th

scream audio player
scream – audio player
  • play mp3 files
  • listen to the radio online:
    • Mode-> Icecast
    • Server tab/+/choose

STC Seminar – May 24th

vic and rat
vic and rat

193.190.247.43

3ffe:b80:2:883f::c1be:f72b

  • let’s try...
  • IPv4: webmail PC & iPAQ
  • IPv6 (vic): Isabel PC & iPAQ

193.190.246.154 (Isabel)

3ffe:b80:ca5:1:260:97ff:fe25:e8d8

IPv4

193.190.247.35

193.190.246.20(webmail)

STC Seminar – May 24th

gaim chatting
gaim – chatting...
  • supports:
    • ICQ
    • IRC
    • MSN
    • Yahoo
  • feel like talking?

STC Seminar – May 24th

slide30

Thank You!

Questions?

STC Seminar – May 24th