Transcript Personal Area Networks

A Survey of Bluetooth
Applications
By:
Ken Iverson, Nasr Sattar,
Derek Simpson, & Tim Wilson
Overview
Low-cost, short-range
wireless standard.
Released in 1999.
Bluetooth SIG.
Operates at 2.4GHz in
the ISM Band.
Maximum Speed: 1Mbps
Potential Applications
Personal Area Networks (PANs)
Cellular Infrastructure Improvement
Wireless Audio
Internet Access for Mobile Devices
Simple Cable Replacement
Technical Specifications
Positive Frequency Deviation = 1
Negative Frequency Deviation = 0
Master-Slave Architecture (Frequency Hopping)
Antenna Types
Baseband
Link Control Layer
Link Manager
Wireless Access Protocol
(WAP)
WAP
Wireless Application
Protocol (WAP) is an
open, global
specification that
empowers mobile
users with wireless
devices to easily
access and interact
with information and
services instantly.
WAP cont.
WAP is applicable to handheld digital
wireless devices such as mobile phones,
pagers, two-way radios, smart phones,
and communicators.
WAP has client/server architecture,
allowing mobile devices to use micro
browsers. Micro browsers are specialty
browsers, able to fit on smaller screens
and use lesser memory.
WAP cont.
HTML is replaced by WML.
The mobile access usage will increase
drastically as there are many more mobile
users than desktop PC users.
Current website providers have WAP
pages, able to be viewed on mobile
devices using micro browsers.
WAP cont.
WAP uses several Internet protocols for
mobile devices to access the Internet. It
provides the following:
– Wireless Application Environment
– Wireless Session Protocol
– Wireless Transport Protocol
– Wireless Transport Layer Security
WAP cont.
WAP uses various Internet protocols
including PPP. The WAP layers are joined
to Bluetooth by three Internet protocols.
Bluetooth has a RFCOMM serial port
emulation layer through which Bluetooth
datagrams are sent from the three WAP
Internet protocol layers.
Personal Area Networks
Fast-Growing Technology
Piconets
Point to Point vs. Point to Multipoint
Connections
Scatternets
Scatternet Architectures
Bluetooth Network Encapsulation
Protocol (BNEP)
Network Access Points
NAP Device
Access to Wired
Networks
Connection Process
Packet Filter Database
Group Ad-Hoc Networks
Local Access Only
GN Compatibility
Connection Process
Termination of GN
Connections
Bluetooth Audio
Quality
– GSM data format – same as cellular phone
– Tradeoffs
Quality vs. Robustness
– Quality
SCO link
ACL channel
Bluetooth Audio cont…
Coding techniques
– Log PCM
– CVSD
Applications
– Automobiles
– Headsets
– Stereo systems
Bluetooth and Cellular
Infrastructure
Bluetooth in the GSM
markets
Mobile Cellular Internet
Bluetooth and Cell
Phone interference
Telephony Control
TCS-BIN layer
– Controls voice and data
– Binary encoding for
packet-based telephony
control
– Exchange call signaling
information
Bluetooth
Usage Models
Ultimate Headset
– Wireless Headset
– Communication with
other devices
– Voice recognition
Three-In-One Phone
– One phone for office,
home, and mobile
– Reduce cellular air
time
Exam Question
This protocol is an open, global specification that
empowers mobile users with wireless devices to
easily access and interact with information and
services instantly.
a.
b.
c.
d.
POP
WAP
LDAP
BNEP
Answer: B
Prepared by:
Ken Iverson
Nasr Sattar
Derek Simpson
Tim Wilson