Bluetooth

1
Bluetooth
Bluetooth

• Martin van der Zee
• Ericsson EuroLab Netherlands

2
Overview

• Introduction
• Baseband layer
• Security
• Special Interest Group (SIG) 2
• Usage scenarios products

3
General characteristics

• Low-cost,
• Low-power,
• Small-sized,
• Short-range,
• Robust wireless technology

4
General characteristics

• Universal wireless interface
• Ad-hoc networking architecture
• 80 Mhz in unlicenced ISM band at 2.45 Ghz
• Grosbitrate 1 Mbps
• Simultaneous voice and high speed data support
• Evolves from cable replacement to networking
  solution, ...

5
Bluetooth protocol architecture
Standard
Host
Adaptation
Host Controller if
Core
Host Controller
6
Bluetooth positioning

• Bluetooth
• Wireless voice and data for mobile devices
• IrDA
• Wirelss data cable replacement for devices in
  line of sight
• HomeRF
• Networking mobile data and voice devices to a PC
  anywhere in the home
• IEEE 802.11 and Hiperlan 2
• Wireless enterprise networking in the office
• DECT
• Wireless voice at home and in the office

7
Bluetooth positioning
Bluetooth
GSM
GPRS
UMTS
Bandwidth
DECT
WLAN
IrDA
UMTS
IR
Bluetooth
Coverage
8
Bluetooth positioning
9
Baseband
10
Frequency hopping
11
Frequency hop synchronise
Slave
Master
Slave
Slave
Slave
Piconet
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Interference

• Frequency hopping
• Short range
• Power control
• FEC and ARQN
• Short packets and fast acknowledgements
• Other equipment in ISM band e.g. WLAN, micro-wave
  oven, etc.

13
Bluetooth Link types

• Synchronous Connection Oriented (SCO)
• Circuit switched typically used for voice
• Symmetric, synchronous service
• Slot reservation at fixed intervals
• Point-to-point
• Asynchronous Connectionless Link (ACL)
• Packet switched
• Symmetric or asymmetric, asynchronous service
• Polling mechanism between master and slave(s)
• Point-to-point and point-to-multipoint

14
ACL data rates
15
SCO links
16
Voice and data transmissions
SCO
ACL
ACL
SCO
SCO
ACL
ACL
ACL
Master
Slave
Slave
Slave
17
Piconet capacity

• One ACL link (432 kbps symmetric or 721/56 kbps
  asymetric)
• or
• Three simultaneous SCO links (64 kbps)
• or
• A combination of voice/data

18
Device modes
19
Paging
PAGING
PAGE scan
20
INQUIRY procedure
fn
fn1
fn2
A
A
A
A
B
B
B
B
A
A
A
A
INQUIRY
FHS
fn
fn1
fn2
INQUIRY scan
Decrementing RAND
21
Power consumption

• Low power architecture
• Idle 1 duty cycle
• PARK mode even lower duty cycle
• In Active mode slave scans every master-to-slave
  slot
• For Link control information only header is
  transmitted
• Only scan header when transmission not directed
  to device
• Low power consumption
• Idle mode 0.3 mA
  gt 3 months with 600 mAh battery
• Voice mode 10 mA (one voice channel) gt
  60 hours,
• Data mode average 6 mA (20 utilization) gt
  100 hours

22
Security
23
Pairing

• Pairing establishes a secret key between two
  devices
• Pairing may require user interaction (PIN, press
  key)
• Secret key used for encryption and authentication

24
Authentication
25
Encryption
26
Special Interest Group (SIG) 2
27
Bluetooth specification

• SIG1 BT1.0 specification
• Ericsson, Nokia, IBM, Intel, Toshiba
• Foundation for cable replacement
• BT 1.0 specification (Core Profiles)
• Profiles handeld, headphone, laptop and phone
  centric
• Next phase SIG2
• Motorola, 3COM, Lucent and Microsoft joined SIG2
• Higher speeds
• More functionality
• 1.0 compatible
• New working groups

28
Bluetooth 1.0 profiles
29
SIG 2 Working Groups

• Profiles
• Automotive
• Personal Area Networking
• Humand Input Devices
• Enhanced Audio/Video
• Printing
• Still Image
• Extended Service Discovery
• Local Positioning
• Unrestricted Digital Use
• Other
• Radio2
• WLAN Co-existence / interoperability

30
Usage scenarios Products based on BT1.0
31
Usage scenarios
Cable Replacement
32
Internet bridge

• Mobile Internet
• on the move, in the office, in the car, on the
  sofa, ...

33
The ultimate headset

• Keep your hands free with the ultimate solution
  for the
• Road
• Office
• Car

34
The conference scenarios

• Share and exchange data in the meeting room

35
Ericsson products

• End-user products
• Headset with Mobile phone adapter (e.g. T28)
• Mobile phones (e.g. R520, T36)
• Webpad
• Bluetooth components
• IRMA chipset
• Embedded Module Barney
• Development Kit
• Bluetooth software stack (e.g. 'LEGS')

36
Other products

• Toshiba PC card (199)
• Socket CompactFlash card (1Q 2001)
• Digianswer Demo PC card / RS232 (4995)
• Motorola PC card, Mobile phone Timeport 270
• GN Netcom 9000 Headset

37
Bluetooth interoperability

• Qualification guarantees interoperability
• Only products that pass Qualification may use
  Bluetooth trademark
• Un-plug fest

38
How some companies view Bluetooth's future
39
SONY / CASIO
40
HP

• Print data from network
• maps, emails, web pages,
• Print phone book other phone data
• Print directly from camera

41
Siemens

• Cable replacement
• Home Access Point
• Home Control

42
CASIO

• Intelligent home
• Door lock, Light, Audio/Video, Electronic
  equipment, Automatic synchronisation, ...

43
Links

• Bluetooth wireless technology and specification
• http//www.bluetooth.com
• Ericsson Bluetooth products, concepts and
  training
• http//www.ericsson.com/bluetooth
• Explaining Bluetooth
• J. Haartsen, Bluetooth, Ericsson Review
  (http//www.ericsson.se/review) No. 3, 1998
• J. Haartsen, The Bluetooth Radio System, IEEE
  Personal Comm., February 2000
• H. Arfwedson, R. Sneddon, Ericsson's Bluetooth
  modules, Ericsson Review, No. 4, 1999