Download Windows Wireless Scenarios and Strategies

Bluetooth Wireless
System
Joe Decuir
Microsoft
Chair, Seattle COM-19
[email protected]
Agenda




Wireless Overview (from Tim Moore
of Microsoft)
Bluetooth System Overview (from
Jim Kardach of Intel)
Windows Bluetooth Stack (from Ken
Ray and Stan Adermann of
Microsoft)
References:

http://www.microsoft.com/winhec
Windows Wireless
Architecture
Tim Moore
Lead Program Manager
Windows Networking
Microsoft Corporation
Wireless Overview Agenda

Wireless trends


WAN, LAN, PAN
Scenarios


Adhoc, home, small business
Enterprise, ISP
Wireless Trends










IP networks
Always connected
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
Information Anytime, Anywhere
Connecting Everything
Windows 98
Windows 2000
Desktop
Windows NT Embedded
Windows CE
Intelligent appliance
Micro-browser
Services
Servers
Smart object
Smart Card for
Windows
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
Q4
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
Materials from Andrew Seybold-Microsoft Exchange Conference 1999
Local-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
Q1
Q2
Q3
Q4
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
Materials from Andrew Seybold-Microsoft Exchange Conference 1999
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
Q1
Q2
Q3
Q4
IrDA
4Mbps
Bluetooth
721 Kbps
Computer Integrated Products
Initial Shipments
Integrated Handsets
PC Card and CF Module
Materials from Andrew Seybold-Microsoft Exchange Conference 1999
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


GPRS
At meetings, in the office,
on the road
Reliable, secure,
multimedia LAN
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








“Just works”
Always connected
Unified transport: IP
Mobility
Unified security model
Adhoc
QoS
Performance
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


CDPD


Especially when roaming
Configure Network Equipment Identifier
802.11

Configure network name and security keys


Per location
Bluetooth

Configure PIN numbers

Per device
Adhoc Architecture
FTP
OBEX
WinSock 2.0
Networking
Services
802.1X
RSVP
UPnP
Network
EAP-TLS DHCP
Location
Netbt
IrDA
Protocol
stacks
TCP/IP
RFCOMM
NDIS 5.1
802.1D
BthNet
IrDA
Bluetooth
802.11
1394
Ethernet
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
APIPA when no DHCP server
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/Bluetooth Architecture
FTP
Winsock
IrTRAN-P Print
server
monitor IrOb
NDISWAN
IrDial
TinyTP
NDIS
OBEX
Unimodem
IPOb
BthOb
UPnP
IrCOMM
IrLMP
IrLAP
IrLPT
TCP/IP
IrSIR
SERIAL
IrDA hardware
RFComm
HID KsMixer
802.1D
BthNet
FIR driver
Hardware
BthMDM
BthUSB
USBD
BtHID BtAudio
BthPORT
BthPCCARD
PCMCIA
BT hardware
IrDA Applications

File transfer





Integrated into shell
Image exchange from camera
Dial-up networking via cellphone
Printing
Synchronization

ActiveSync®
Bluetooth Applications


Subset of IrDA
File transfer



Integrated into IrDA ftp transfer
Dial-up Networking via cellphone
IR and Bluetooth applications are
tied to particular media

Do not inter-operate
Bluetooth Architecture
Overview
Andrew Liu
Technical Marketing Manager
Intel Architecture Labs
Intel Corporation
"The Bluetooth Specification is still
preliminary; All information regarding
Bluetooth is subject to change without notice"
Agenda



Bluetooth SIG update
Bluetooth architectural overview
Summary/call to action
What Does Bluetooth Wireless
Technology Do For You?
Landline
Cable
Replacement
Data/Voice
Access Points
Personal Ad-hoc
Networks
Program Update

Final specification published Monday 7/26/99



Bluetooth membership exceeds 1,800 companies!



Core technology specs and Profile requirements
Result of work from ~200 engineers
Bluetooth wireless technology becoming the choice for
wireless connectivity
Full list of member companies on Web site www.bluetooth.com
Bluetooth program on track for products available in 2000


Products available this year
Next step is qualification program




SIG now focusing on ensuring product interoperability
Bluetooth qualification program started
Bluetooth wireless technology is the basis for the IEEE
802.15.1 standard
Bluetooth SIG has expanded

New contracts and membership types
The SIG Formally Known
As Bluetooth ; )

New Contracts

Adopter/Early Adopter = Early Adopter


Early Adopter in working group = Associate


Early Adopter Contract, Associate Amendment
Open IP license to Bluetooth wireless
technology



Early Adopter Contract
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)
Bluetooth Momentum
1600
SIG
Expands
1400
Byte.com
Award
1200
1.0 Spec
Release
1000
Adopters
Conferences
Discover
Awards
Total
800
#/Mon
600
400
200
SIG
Formed
0
A-98
M-98
®
R
R
J-98

J-98
A-98
S-98
O-98
N-98
D-98
J-99
F-99
M-99
A-99
M-99
SIG is still growing
J-99
J-99
A-99
S-99
O-99
N-99
D-99
J-00
F-00
Future Directions for Bluetooth
I.
II.
III.
IV.
V.
VIII.
IX.
X.
XI.
XII.
XIII.
XIV.
®
R
R
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
What is Bluetooth?
Applications
TCP/IP HID
RFCOMM
Application Framework
and Support
Data
Host Controller Interface
L2CAP
Audio
Link Manager
Baseband
Link Manager and
L2CAP
LMP
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
2
BT.L CAP-A
2
BT.L CAP-D
BT.L2CAP-D
BT.L2CAP-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
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)
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
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
Bluetooth RF Specifications
Specified for low cost, single chip implementation






Noise floor margin for substrate noise and low current 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

One
Slot
Packet
Slave
625 us
One Slot
625 us
One Slot
Spread spectrum frequency hopping radio


79/23 one MHz channels
Hops every packet



Packets are 1, 3, or 5 slots long
Frame consists of two packets

fk+1
Three Slot Packet
Master
One
Slot
Packet
Slave
fk
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
sb
Radios can
share piconets!
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

S
In forming a piconet, master gives slaves its clock and device ID



IDc
C
All devices in a piconet hop together


IDa
S
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


Active Member Address (AMA, 3-bits)
Parked Member Address (PMA, 8-bits)
sb
P
IDa
Functional Overview

Standby


Ttypical=2s
Connecting
States
Page
Actively on a piconet
(master or slave)
Ttypical=0.6s
Active
States
Low Power
connected states
Transmit
data
AMA
Connected
AMA
Ttypical=2 ms
Park/Hold/Sniff

Inquiry
Connect to a
specific radio
Connected


Ask about radios to
connect to
Page


Standby
Inquire


Waiting to join a piconet
Unconnected
Standby
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
TYPE
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
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


Voice mode 8-30 mA



Þ 75 hours
Data mode average 5 mA
(0.3-30mA, 20 kbit/s, 25%)


Þ 3 months
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
 Forward-error
0-2745b
payload
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
16-bit CRC (CRC-CCITT) & 1-bit ACK/NACK
 1-bit sequence number

®
R
R
(ACL packets only)
Bluetooth Security Features



Fast Frequency Hopping (79 channels)
Low Transmit Power (range <= 10m)
Authentication of remote device



Encryption of payload data



Based on link key (128 Bit)
May be performed in both directions
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


Security levels for services




Creates trusted device groups
Authorization required
Authentication required
Encryption required
Different or higher security requirements
could be added:



Personal authentication
Higher security level
Public key
Application level security
 Builds
on-top of link-level security
 creates
 Security
trusted device groups
levels for services
 authorization
required
 authentication required
 encryption required
 Different
or higher security requirements
could be added:
 Personal
®
R
R
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)


Architecture compliant and safe
for use on airlines


Working through FCC, EC,
MPT for spectrum, and
power harmonization
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




®
R
R

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




Defines a inquire/response protocol for
discovering services

®
R
R
Information about services provided by
attributes
Attributes composed of an ID (name) and a
value
IDs may be universally unique identifiers
(UUIDs)
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

®
R
R
protocol reuse
resuse existing protocols, e.g., IrDA’s OBEX, or
WAP for interacting with applications on phones
Interoperability And Profiles



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
Applications
Protocols

Profiles
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)


The Bluetooth spec comprises



Piconets may overlap in time and space for high
aggregate bandwidth
A hardware and software protocol specification
Usage case scenario profiles and
interoperability requirements
To learn more: http://www.bluetooth.com
Call To Action

Join the SIG if you haven't already



Learn how Bluetooth wireless technology works NOW!




See Microsoft's presentation on Bluetooth wireless technology
Big conference in Monte Carlo - check it out!
More information: http://www.Bluetooth.com
Implement Bluetooth software and hardware in your
products and systems


Help advance Bluetooth functionality by supporting the
working groups committees
Got a new usage model? Submit a request
Insure interoperability via Un-plugfests
Help support native operating system development

Provide test hardware to Microsoft
Bluetooth Stack
In Windows
Ken Ray and Stan Adermann
Software Development Engineers
Windows Division
Microsoft Corporation
Agenda

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:



Syncing and transfer through OBEX




Files
Pictures
Vcards
Dial up Networking



Discovery
Bonding
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 DUNs
BthModem (a WDM modem)
OBEX.DLL


Object Exchange 1.2
Bus Agnostic
BthPort



Support Currently Defined buses:
USB, Serial, 16550
Plug and Play events
Bluetooth Request Blocks
SDP


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 device
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





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
RF Comm Applications

Winsock allows for dynamic
discovery and communication




Talk to the device, not to the conduit
(“My Laserjet” versus LPT2)
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




Server




Photos
Vcards (not “in the box”)
Simple databases
Registration
New Obex Commands and types
Application can register as handler for custom commands
Client



Discovery
Navigate directory structure (enumerate objects)
Push Pull objects