Thomas Kunz
Systems and Computer Engineering
61
WPAN: IEEE 802.15-1 – Bluetooth
nData rate
–Synchronous,
connection-oriented: 64 kbit/s
–Asynchronous,
connectionless
n433.9 kbit/s symmetric
n723.2 / 57.6 kbit/s asymmetric
nTransmission
range
–POS
(Personal Operating Space) up to 10
m
–with
special transceivers up to 100 m
nFrequency
–Free 2.4
GHz ISM-band
nSecurity
–Challenge/response
(SAFER+), hopping sequence
nCost
–$50
adapter, drop to $5 if integrated
nAvailability
–Integrated
into some products, several vendors
nConnection set-up
time
–Depends on
power-mode
–Max. 2.56s,
avg. 0.64s
nQuality of
Service
–Guarantees,
ARQ/FEC
nManageability
–Public/private
keys needed, key management
not specified, simple system
integration
nSpecial
Advantages/Disadvantages
–Advantage:
already integrated into several
products, available worldwide, free
ISM-band, several vendors, simple system,
simple ad-hoc networking, peer to
peer, scatternets
–Disadvantage:
interference on ISM-band,
limited range, max. 8 devices/network&master,
high set-up latency