Download Bluetooth Wireless System

Bluetooth™ Wireless System
Joe Decuir
Microsoft
Chair, Seattle COM-19
[email protected]
Note: Bluetooth™ is a trademark
of Ericsson
Agenda
• Wireless Overview
– http://www/microsoft.com/hwdev/wireless
• Bluetooth System Overview
– http://www.microsoft.com/winhec
• Windows Bluetooth Stack
– http://www.microsoft.com/hwdev/bluetooth
Wireless Overview
• Wireless trends
– Wide Area Networks (WAN)
– Local Area Networks (LAN)
– Personal Area Networks (PAN)
• Scenarios
–
–
–
–
Adhoc
Home
Small business
Enterprise, ISP
Wireless Trends
•
•
•
•
•
•
•
•
•
•
IP networks
Always connected (packet vs circuit mode)
Increased bandwidth
Convenience
Moving from vertical market to horizontal markets
Moving from proprietary to standards based
Proliferation of smart devices
New scenarios enabled
Outsourcing
Adhoc networks
Wireless Media
• Infrared: short range and directional
• Personal Area Networks: short range radio
– Bluetooth, IEEE 802.15.1
• Local Area Networks: medium range radio
– IEEE 802.11(a,b), HyperLAN, HomeRF, etc
• Wide Area Networks: long range radio
– Cellular systems: GSM, TDMA, CDMA, “3G”
• Broadband: high speed fixed radio
– IEEE 802.16
Wide-Area Wireless
Wide Area Wireless
US Summary
1999
Q1
Q2
Q3
2000
Q4
Q1
Q2
Q3
2001
Q4
Q1
Q2
Q3
2002
Q4
Q1
Q2
Q3
2003
Q4
Q1
Q2
Q3
Mobitex 8, DataTAC 19.2 Packet
CDPD 19.2 Packet
GSM 9.6 Circuit-Switched
iDEN - Nextel - 9.6 Packet and
Circuit-Switched
cdmaOne Circuit-Switched
14.4 - IS-95A
General Deployment
Trials Start
General Deployment
Trials
AirTouch
GTE, Sprint
Limited Deployment
cdma2000 1XRTT
153 Kbps - Packet
Trials
Start
GSM GPRS Technologies
Trials
Start
General Deployment
19.2 Rx/9.6 Tx
57.6 Kbps
38.4 Rx/9.6 Tx
EDGE
384 Kbps Packet
Limited Deployment
Trials Start
General Deployment
Q4
Local-Area Wireless
Local Area Network
Technology
1999
Q1
Q2
Q3
2000
Q4
Q1
Q2
Q3
2001
Q4
Q1
Q2
Q3
2002
Q4
Q1
802.11 (FHSS) 2.4 GHz
1 Mbps
Freq. Hopped Spread Spectrum
802.11 (DSSS) 2.4 GHz
1 or 2 Mbps
Direct Sequence Spread Spectrum
Hiperlan
23.5 Mbps
High Performance Radio LAN
Initial
Shipments
P802.11b (DSSS) 2.4 GHz
Initial
11 Mbps
Shipments
Direct Sequence Spread Spectrum
Final
Specification
P802.11a 5 GHz
Specifications
54 Mbps
Approved
Direct Sequence Spread Spectrum
Initial Mobile
Shipments
Q2
Q3
2003
Q4
Q1
Q2
Q3
Q4
Personal Area Wireless
Local Area Network
Technology
1999
Q1
Q2
Q3
2000
Q4
Q1
Q2
Q3
2001
Q4
Q1
Q2
Q3
2002
Q4
Q1
Q2
Q3
2003
Q4
IrDA
4Mbps
Bluetooth
721 Kbps
Computer Integrated Products
Initial Shipments
Integrated Handsets
PC Card and CF Module
Q1
Q2
Q3
Q4
Ad Hoc Networks
Many diverse
devices to be
connected
Desktops,
Notebooks
TVs,
games
Books, tablets,
handheld PCs
Phones, Pagers
PC companions
A Connected Home
1394
STB
IrDA
802.11
Ethernet/1394b
Internet
Bluetooth
PLC
xDSL
Cable
Satellite
POTS, ISDN
Residential
Gateway
Phone
A Connected Small Office
Phone
Internet
T1, T3, …
Small
Business
Server
Ethernet
Edge Server
802.11
Bluetooth
Enterprise
GPRS
GPRS
IrDA
• Information at
your fingertips
– At meetings, in the office, on the
road
– Reliable, secure, multimedia
LAN
GPRS
Bluetooth
Internet
Web Server
802.11
T1, T3, …
Ethernet
Proxy Server
An ISP Connected Public Space
Bluetooth
Phone
GPRS
• Discovery of proximity
services (flight schedules at
airport, mall directories, …)
IrDA
Internet
Web Server
802.11
T1, T3, …
Ethernet
Proxy Server
Wireless Architecture
Requirements
•
•
•
•
•
•
•
•
“Just works”
Always connected
Unified transport: IP
Mobility
Unified security model
Adhoc
QoS
Performance
Windows Wireless Architecture
WinSock 2.0
TAPI 3.0
Routing
APIs
Dial-up
Networking
APIs
Network
streaming
(DirectX)
Networking
APIs
Network
Location
802.1X
DNS
DHCP
Networking
Services
RSVP
UPnP
NetBT
IP packet
filtering
IP
forwarder
TCP/IP
Route table
Protocol
stacks
Packet classifier
Packet scheduler
NDIS WAN
PPTP
IGMP
NDIS 5.1
Ethernet
Async
Bluetooth
IRDP
RNDIS
TR
802.1D
802.11
Affected by
Wireless
Just Works
• No configuration
– Especially when roaming
• CDPD
– Configure Network Equipment Identifier
• 802.11
– Configure network name and security keys
•
Per location
• Bluetooth
– Configure PIN numbers
•
Per device
What is an adhoc network?
•
No network infrastructure at all
–
–
–
•
Interconnections not managed
–
–
•
Multiple interconnections to destinations
Loops in the network
Home network
–
•
E.g. back to back Ethernet
Automatic IP addressing when no DHCP server available
NetBT broadcast for adhoc name resolution
ICS contains DNS proxy and DDNS support for the adhoc home
network
Service Discovery Protocols
–
–
–
SSDP protocol enables UPnP discovery
SDP protocol enables Bluetooth wireless technology discovery
IrLAP protocol enables IrDA discovery
IrDA Applications
• File transfer
– Integrated into shell
•
•
•
•
Image exchange from camera
Dial-up networking via cellphone
Printing
Synchronization
– E.g. PDA or cell phone to PC
Bluetooth Applications
• Subset of IrDA
• File transfer
– Integrated into IrDA ftp transfer
• Dial-up Networking via cellphone
• Synchronization
• IrDA and Bluetooth applications are tied to
particular media
– Do not inter-operate
Bluetooth Overview
• Genesis
• Bluetooth architectural overview
• Bluetooth Program update
What Does Bluetooth Wireless Technology Do
For You?
Landline
Cable
Replacement
Data/Voice
Access Points
Personal Ad-hoc
Networks
What does Bluetooth Do?
Topology
Supports up to 7 simultaneous links
Flexibility
Data rate
Goes through walls, bodies, cloths... Line of sight or modified environment
1 MSPS, 720 Kbps
Varies with use and cost
Power
0.1 watts active power
0.05 watts active power or higher
Size/Weight
25 mm x 13 mm x 2 mm, several
grams
Cost
Long-term $5 per endpoint
Size is equal to range. Typically 1-2
meters. Weight varies with length
(ounces to pounds)
~ $3-$100/meter (end user cost)
Range
10 meters or less
Up to 100 meters with PA
Intended to work anywhere in the
world
Range equal to size. Typically 1-2
meters
Cables vary with local customs
Very, link layer security, SS radio
Secure (its a cable)
Universal
Security
• Cable Replacement
Each link requires another cable
Bluetooth Genesis
• Ericsson was a participant in GSM 7.07, a
standard for connecting PCs and mobile
devices through cell phones offering circuit
mode data and fax services.
• This called for adding serial cables to cell
phones: cumbersome, easy to loose, too
many connections.
• Ericsson, a radio company, decided to
replace short cables with short range radios
Who is Bluetooth?
Harald Blaatand “Bluetooth” II
King of Denmark 940-981
 Son of Gorm the Old (1st King of Denmark) and
Thyra Danebod (daughter of King Ethelred of
England)
This is one of two Runic stones
erected in his capitol city of
Jelling (central Jutland)
 This is the front of the stone depicting the
chivalry of Harald.
 The stone’s inscription (“runes”) say:
 Harald christianized the Danes
 Harald controlled Denmark and Norway
 Harald thinks notebooks and cellular phones
should seamlessly communicate
What is Bluetooth?
Applications
TCP/IP HID
RFCOMM
Application Framework
and Support
Data
Host Controller Interface
L2CAP
Audio
Link Manager
LMP
Baseband
Link Manager and
L2CAP
Radio & Baseband
RF
• A hardware description
• An application framework
Latest Version on
Bluetooth Website:
www.Bluetooth.com
What is Bluetooth?
Software
Applications
TCP/IP HID
RFCOMM
Data
L2CAP
Audio
Link Manager
LMP
Baseband
RF
• A hardware description
• An application framework
Modules
Testing to Specification
T e c h n o l o g y
Certification
T e c h n o l o g y
Applications
TCP/IP HID
vCard
vCal
RFCOMM
vCard
Data
IrOBEX
vCal
PPP
IrOBEX
PPP
Audio
TS0710
Ctrl
L2CAPAudio
Audio
A Ctrl
U
D
I
O
A
U
D
I
O
TS0710
Link Manager
Baseband
RF
•
•
Application Framework
Application Layer
Framework
Certification
Certification
Certification Classes
UDP
WAP
WAP
TCP/IP
L2CAP
TCP/IP
LM
L2CAP
BB
LM
RF
BB
RF
Lower Interface
Application
Framework Certification Class
Class
BT.OBEX
Layer
Certification Classes BT.vCard
BT.OBEX
BT.vCal
Service
UDP
Still
Img
Still
Img
HID
HID
LMP
vCard
vCal
UDP
Service
PPP
IrOBEX
vCard
WAP
vCalImages
Still
UDP
PPP Ctrl
Audio
IrOBEX
RFCOMM
WAP
TCP/IP
Still Images
HID
Audio Ctrl
RFCOMM
TCP/IP
HID
Type
IrOBEX
IrOBEX
PPP
RFCOMM
Type
RFCOMM
IrOBEX
TCP/IP
IrOBEX
HID
PPP
RFCOMM
L2CAP
RFCOMM
L2CAP
TCP/IP
L2CAP
2
L HID
CAP
2
L CAP
2
L CAP
L2CAP
L2CAP
BT.PPP
Lower Interface
BT.TS0710
Class
BT.TS0710
BT.OBEX
BT.TCP/IP
BT.OBEX
BT.HID
BT.PPP
2
BT.TS0710
BT.L
CAP-A
2
BT.TS0710
BT.L
CAP-D
2
BT.TCP/IP
BT.L
CAP-D
2
BT.HID
BT.L
CAP-D
BT.UDP
Certification
BT.PPPClass
BT.OBEX
BT.vCard
BT.WAP
BT.vCal
BT.SImg
BT.UDP
BT.PPP
BT.AudioCtrl
BT.OBEX
BT.TS0710
BT.WAP
BT.TCP/IP
BT.SImg
BT.HID
2
BT.L CAP-A
2
BT.L CAP-D
BT.L2CAP-D
BT.L2CAP-D
BT.AudioCtrl
BT.TS0710
BT.TCP/IP
BT.HID
Basic Layer Certification Classes
Lower Interface
Class
Audio
Data
2
L CAP
LM
BT.LM-A
BT.LM-D
LM
BB
BT.BB-A
BT.BB-D
Lower
Interface
Service
BB
RF
BT.RF
BT.RF
Type
Class
RF
Air
Audio
Data
A unit that supports both audio and data gets the certification class
A and D.
2
Example:
BT.BB-A,D
L CAP
LM
BT.LM-A
BT.LM-D
LM
BB
BT.BB-A
BT.BB-D
BB
RF
BT.RF
BT.RF
RF
Air
-
Service
Certification Class
Basic Layer
Certification Audio
Basic Layer Certification Classes
Type
Data
2
2
BT.L CAP-A
BT.L CAP-D
BT.LM-A
BT.LM-D
Certification Class
BT.BB-A
BT.BB-D
BT.RF
BT.RF
Audio
Data
2
2
BT.L CAP-A
BT.L CAP-D
BT.LM-A
BT.LM-D
BT.BB-A
BT.BB-D
BT.RF
BT.RF
A unit that supports both audio and data gets the certification class A and D.
Example: BT.BB-A,D
Bluetooth devices will be tested against the specification
Bluetooth Qualified Test Facilities (BQTF)
Bluetooth Core Specifications
•
•
•
•
•
•
•
•
A: Radio
B: Baseband
C: Link Manager
D: Logical Link Control
E: Service Discovery
F: RFCOMM, IrDA, Telephony, WAP
H: Host Controllers, USB, Serial, UART
I: Compliance: Test modes, Test control interfaces
Bluetooth RF Specifications
Specified for low cost, single chip implementation
–
–
–
–
–
–
Noise floor margin for substrate noise and low current Low
Noise Amplifier (LNA)
Linearity set by near-far problem
In-band image allows low-cost low IF
VCO phase noise enables integrated VCO
TX-RX turn around time enables single synthesizer
2.4 ISM band chosen for global use and process capabilities
Sensitivity traded for low cost integration of
transceiver and baseband
Basic Baseband Protocol
Frame
Frame
fk
fk+1
One
Slot
Packet
Master
fk
One
Slot
Packet
One
Slot
Packet
Slave
625 us
One Slot
•
Three Slot Packet
Master
Slave
625 us
One Slot
Spread spectrum frequency hopping radio
–
–
79 or 23* one MHz channels (*country dependent)
Hops every packet
•
–
–
Packets are 1, 3, or 5 slots long
Frame consists of two packets
•
fk+1
Transmit followed by receive
Nominally hops at 1600 times a second (1 slot packets)
Network Topology
•
Radio Designation
–
–
•
Connected radios can be master or slave
Radios are symmetric (same radio can be master or slave)
Piconet
–
–
Master can connect to 7 simultaneous or 200+ active slaves per piconet
Each piconet has maximum capacity (1 MSPS)
•
•
Unique hopping pattern/ID
Scatternet
–
High capacity system
•
–
Minimal impact with
up to 10 piconets
within range
S
P
M
Radios can
share piconets!
sb
M
P
S
P
sb
S
S
The Piconet
IDa
IDd
IDa
IDd
IDa
D
A
P
M
IDe
IDe
sb
E
IDa
IDb
IDb
B
IDc
•
IDa
S
IDc
C
All devices in a piconet hop together
– In forming a piconet, master gives slaves its clock and device ID
•
•
•
•
Hopping pattern determined by device ID (48-bit)
Phase in hopping pattern determined by Clock
Non-piconet devices are in standby
Piconet Addressing
M or S
IDa
sb
– Active Member Address (AMA, 3-bits)
– Parked Member Address (PMA, 8-bits)
P
S
Functional Overview
•
Standby
– Waiting to join a piconet
•
Unconnected
Standby
Standby
Inquire
– Ask about radios to connect
to
•
Page
– Connect to a
specific radio
•
Connecting
States
Inquiry
Page
Ttypical=0.6s
Connected
– Actively on a piconet
(master or slave)
•
Ttypical=2s
Active
States
Park/Hold/Sniff
Transmit
data
AMA
Connected
AMA
Ttypical=2 ms
– Low Power
connected states
Low Power
States
Releases
AMA
Address
PARK
PMA
Ttypical=2 ms Ttypical=2 ms
SNIFF
AMA
HOLD
AMA
Packet Types/Data Rates
Packet Types
TYPE
SCO link
1
0000
0001
0010
0011
NULL
POLL
FHS
DM1
2
0100
0101
0110
0111
1000
1001
SEGMENT
Data Rates (Kbps)
ACL link
NULL
POLL
FHS
DM1
DH1
HV1
HV2
HV3
DV
AUX1
3
1010
1011
1100
1101
DM3
DH3
4
1110
1111
DM5
DH5
• ASL –Packet like behavior
• SCO – Circuit like behavior
TYPE
symmetric
asymmetric
DM1
108.8
108.8
108.8
DH1
172.8
172.8
172.8
DM3
256.0
384.0
54.4
DH3
384.0
576.0
86.4
DM5
286.7
477.8
36.3
DH5
432.6
721.0
57.6
Mobile = Battery Life
•
Low power consumption*
– Standby current < 0.3 mA
•
Þ 3 months
– Voice mode 8-30 mA
•
Þ 75 hours
– Data mode average 5 mA
–
(0.3-30mA, 20 kbit/s, 25%)
•
•
Þ 120 hours
Low Power Architecture
– Programmable data length (else radio sleeps)
– Hold and Park modes 60 µA
•
•
•
Devices connected but not participating
Hold retains AMA address, Park releases AMA, gets PMA address
Device can participate within 2 ms
– *Estimates calculated with 600 mAh battery and internal amplifier, power
will vary with implementation
Error Handling
72b
54b
access code
header
0-2745b
payload
• Forward-error correction (FEC)
– headers are protected with 1/3 rate FEC and HEC
– payloads may be FEC protected
• 1/3 rate: simple bit repetition (SCO packets only)
• 2/3 rate: (10,15) shortened Hamming code
• 3/3 rate: no FEC
• ARQ (ACL packets only)
– 16-bit CRC (CRC-CCITT) & 1-bit ACK/NACK
– 1-bit sequence number
®
Bluetooth Security Model
Bluetooth Security Features
• Fast Frequency Hopping (79 channels)
• Low Transmit Power (range <= 10m)
• Authentication of remote device
– Based on link key (128 Bit)
– May be performed in both directions
• Encryption of payload data
– Stream cipher algorithm ( 128 Bit)
– Affects all traffic on a link
• Initialization
– PIN entry by user
Application Level Security
• Builds on-top of link-level security
– Creates trusted device groups
• Security levels for services
– Authorization required
– Authentication required
– Encryption required
• Different or higher security requirements could
be added:
– Personal authentication
– Higher security level
– Public key
Bluetooth Is Global
• One version for the world
– Architecture compliant with global
emission rules
(2.4 GHz ISM band)
•
Working through FCC, EC,
MPT for spectrum, and
power harmonization
– Architecture compliant and safe for
use on airlines
•
Working with FAA, JAA, FCC, airplane
manufacturers, and airlines
– Reviewing security architecture with
affected countries
Bluetooth Radio Modules
• Complete radio on a module
–
Designed to meet “Limited Module Compliance”
(LMA) requirements
•
•
–
–
–
Pre-certified to meet global regulatory requirements
Allows devices assembled with modules to be “self-certified”
USB Interface
Solder-ball connections
External Antennae
Compact
FLASH
Card
25 mm dia
17x33mm
36x43mm
Bluetooth Protocols
Still Image
WAE
vCard/vCal
WAP
OBEX
HID
Service Discovery
TCP/UDP
Audio
Printing
RFCOMM
IP
TCS
L2CAP
Host Controller Interface
- Bluetooth Specific
- Reused Spec
- Modified
Bluetooth protocols
• Host Controller Interface (HCI)
– provides a common interface between the
Bluetooth host and a Bluetooth module
• Interfaces in spec 1.0: USB; UART; RS-232
• Link Layer Control & Adaptation (L2CAP)
– A simple data link protocol over baseband
•
•
•
•
•
connection-oriented & connectionless
protocol multiplexing
segmentation & reassembly
QoS flow specification per connection (channel)
group abstraction
Bluetooth protocols
• Service Discovery Protocol (SDP)
– Defines a service record format
• Information about services provided by attributes
• Attributes composed of an ID (name) and a value
• IDs may be universally unique identifiers (UUIDs)
– Defines a inquire/response protocol for discovering
services
• Searching for and browsing services
Bluetooth protocols
• RFCOMM (based on GSM TS 07.10)
– emulates a serial-port to support a large base of legacy
(serial-port-based) applications
– allows multiple “ports” over a single physical channel
between two devices
• Telephony Control Protocol Spec (TCS)
– call control (setup & release)
– group management for gateway serving multiple devices
• Legacy protocol reuse
– Re-use existing protocols, e.g., IrDA’s OBEX, or WAP for
interacting with applications on phones
Interoperability And Profiles
Applications
Protocols
• Represents default solution
for usage model
• Vertical slice through
the protocol stack
• Basis for
interoperability and
logo requirements
• Each Bluetooth device
supports one or
more profiles
Profiles
Bluetooth Profile Specifications
• K:1 Generic Access
• K:2 Service Discovery
• K:3 Cordless
Telephony
• K:4 Intercom
• K:5 Serial Port
• K:6 Headset
• K:7 Dial Up
Networking
• K:8 Fax
• K:9 LAN Access
• K:10 Generic Object
Exchange
• K:11 Object Push
• K:12 File Transfer
• K:13 Synchronization
Bluetooth Program Update
• 1.0 specifications published in July of 1999
– Core technology specs and Profile requirements
– Currently at 1.1
• Bluetooth membership exceeds 2,000 companies!
– Full list of member companies on www.bluetooth.com Web site
• Bluetooth program on track for products available in 2000
– Products available this year and early 2001
– Next big step is qualification program, to ensure interoperability
• Bluetooth qualification program started
• Bluetooth wireless technology is the basis for the IEEE
802.15.1 standard work
• Bluetooth SIG has expanded
– New contracts and membership types
The SIG Formally Known As
Bluetooth ; )
•
New Contracts
– Adopter/Early Adopter = Early Adopter
•
Early Adopter Contract
– Early Adopter in working group = Associate
•
•
Early Adopter Contract, Associate Amendment
Open IP license to Bluetooth wireless technology
– Original “Foundation Specifications”
– New technology in and around the 12 specification
working groups
•
Only need to sign 1 contract to use any Bluetooth wireless
technology (the new one)
Future Directions for Bluetooth
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
Bluetooth Second Generation Radio
Bluetooth Personal Area Networking
Bluetooth in and around the Car
Bluetooth “Wake-up”
Bluetooth Human Interface Devices (HID)
Bluetooth Audio/Visual
Bluetooth ISM interference/Interoperability
Bluetooth Printing
Bluetooth Still Image
Bluetooth Extended Service Discovery Protocols
Bluetooth Local Positioning
Bluetooth UDI
Summary
• Bluetooth is a global, RF-based (ISM: 2.4GHz band),
short-range, connectivity technology and solution for
portable, personal devices
– It is not just a radio
– Create piconets on-the-fly (approximately 1Mbps)
•
Piconets may overlap in time and space for high
aggregate bandwidth
• The Bluetooth spec comprises
– A hardware and software protocol specification
– Usage case scenario profiles and
interoperability requirements
• To learn more: http://www.bluetooth.com
Windows 2000 Bluetooth Stack
• Bluetooth Architecture in Windows
– Goals
– Components of the Stack
– Functionality
• Opportunities for IHVs and ISVs
– Applications
– Services
– Devices
High Level Goals
• PC work with all devices
– Bluetooth Devices as PC peripherals
– Bluetooth Devices as PC companions
– Bluetooth Devices bridge to network
resources through a PC
• Easy to configure and operate
• Extensible architecture
– Platform for third parties to add value
Scenarios
•
Device configuration:
– Discovery
– Bonding
•
Syncing and transfer through OBEX
– Files
– Pictures
– Vcards
•
Dial up Networking
– Cell as modem
– Null Modem for Peer to peer
•
Generic RFComm applications
– Non-OBEX synchronization
– Other serial-type applications
Technical Requirements
• Bluetooth 1.0 Type II device classification supported
• Required profiles
• Bus Management Infrastructure
– Device and radio configuration
– Control panels
– System Trays
• Extensible framework for value adds
–
–
–
–
–
–
Devices
Profiles
Bus mgmt software
RFComm applications
Object Exchange and special object handling
RAS and TAPI over Unimodem
Bluetooth Stack Diagram
OBEX.DLL
TAPI
WinSock2
UNIMODEM.TSP
SDP/Advisor
MODEM.SYS
AFD.SYS
HID AUDIO
BTHMODEM.SYS
RFCOMM.SYS
BTHPORT.SYS
Stack Components
• BthPort
– L2Cap / HCI
– Hardware abstraction: Serial, USB…
– Enumeration of Found Bound Services
• SDP/Management UI
– Bus management:
• User notification of newly discovered devices
• User assisted Configuration and Bonding
• Configuration of radio
– Local Service Exposure and Publication
Stack Components
• RFCOMM
– RFComm Profile
– TDI interface for WinSock (AFD)
– Bus enumeration for Dial Up Networks
• BthModem (a WDM modem)
• OBEX.DLL
– Object Exchange 1.2
– Bus Agnostic
BthPort
• Support Currently Defined buses:
–
–
–
–
USB
Serial (if hardware available)
UART/16550
Possible PCI HCI (investigating in committee)
• Plug and Play events
• Bluetooth Request Blocks
Service Discovery Protocol
• Provide a “builder” interface to easily create a service
record
• Kernel mode
– Client drivers can submit a list of UUIDs to search for on all
newly discovered devices or initiate a SDP search outside of
device discovery
– BThPort will search for all the services in the browse group
hierarchy
• User mode
– Initiate searches
– Browse service records
Management UI
• Present user with devices in range and bound devices
• Allows the user to easily change the relationship with remote
devices
• Provide unobtrusive PIN and authorization notifications
• UI is accessible from third-party applications for a standard
user experience
• Advanced features
– Filter devices based on COD or address
– Local radio settings
– Manage power policies
OBEX
• Full OBEX 1.2 implementation:
–
–
–
–
Put
Get
SetPath
Definable transactions
• COM API
• Extensible to other media
and transports
OBEX
OBEX.DLL
OBEXBT.DLL
SDP
OBEXIrDA.DLL
OBEXIP.DLL
WINSOCK 2
?
RFCOMM
Modem.SYS
OBEX
BTHSER.SYS
WINSOCK/AFD/TDI
FDO
PDO
PDO
DUN/Lan Access
RFCOMM.SYS Socket FDO
BTHPORT.SYS
PDO
File Transfer/OBEX
Opportunities To Add Value
in Windows 2000 environment
•
•
•
•
•
RF comm applications
OBEX applications/extensions
Bluetooth management application
New device types and/or class drivers
Radios on new hardware buses
RF Comm Applications
• Applications looking for virtual serial ports not
supported
• Legacy TAPI/Unimodem applications see peer
devices as NULL Modems
• Applications enumerate Modem/Serial Devices
through Unimodem
TAPI = Telephony API
Unimodem = Universal Modem Driver, a TAPI service
provider
RF Comm Applications
• Winsock allows for dynamic discovery and
communication
– Talk to the device, not to the conduit (“My
Laserjet” versus “LPT2” or “COM23”)
– Once bonded device is in range the application
can find and use it
– Allows for multiple remote connection to same
service
– Not necessary to manage multiple virtual
COMx ports
OBEX Applications
• Examples
– Photos
– Vcards (not “in the box”)
– Simple databases
• Server
– Registration
– New Obex Commands and types
– Application can register as handler for custom commands
• Client
– Discovery
– Navigate directory structure (enumerate objects)
– Push Pull objects
Other OS support
• Microsoft is only planning to support Windows
2000 and its successors for general purpose PCs.
• Intel and many other third parties are producing
stacks for older Windows versions (e.g. Windows
98, which had USB support).
• Intel, IBM and some other parties are producing
stacks for use on Linux and other Unix versions
• Several embedded OS vendors will support
Bluetooth
• Microsoft is providing support for Windows CE
Call To Action
• Join the SIG if you haven't already
– Help advance Bluetooth functionality by supporting the working groups
committees
– Got a new usage model? Submit a request
• Learn how Bluetooth wireless technology works NOW!
–
–
–
–
See Microsoft's presentation on Bluetooth wireless technology
Bluetooth Developers Conference, December 4th , San Jose CA
Bluetooth Developers Seminar, December 8th, San Jose, CA
More information: http://www.Bluetooth.com
• Implement Bluetooth software and hardware in your products
and systems
– Insure interoperability via Un-plugfests
• Help support native operating system development
– Provide test hardware to Microsoft
Resources, 1of2
• http://www.bluetooth.com
Bluetooth home page, main resource
• http://developer.intel.com/technology/itj/q22000/a
rticles/art_1.htm
Intel white paper on Bluetooth
• http://www.microsoft.com/hwdev/bluetooth
Microsoft Bluetooth™ developer resources
• http://www.microsoft.com/hwdev/wireless
Microsoft wireless developer resources
Resources, 2of2
• http://developer.axis.com/software/bluetooth
Bluetooth on Linux homepage
• http://mobilix.org/bluetooth_linux.html
Laptops, Bluetooth™ and Linux (draft)
• http://www.idgnet.com/crd_linux_223446.html
IBM Linking Linux to Wireless Devices
• http://www.alphaworks.ibm.com/tech/BlueDrekar
BlueDrekar – a Bluetooth protocol driver from IBM
• http://www.upside.com/Ebiz/397f47ae0.html
IBM toasts Linux, Bluetooth marriage