23-11-2012, 02:40 PM
bluetooth and Mobile IP
[attachment=40841]
Bluetooth
Consortium: Ericsson, Intel, IBM, Nokia, Toshiba…
Scenarios:
connection of peripheral devices
loudspeaker, joystick, headset
support of ad-hoc networking
small devices, low-cost
bridging of networks
e.g., GSM via mobile phone - Bluetooth - laptop
Simple, cheap, replacement of IrDA, low range, lower data rates, low-power
Worldwide operation: 2.4 GHz
Resistance to jamming and selective frequency fading:
FHSS over 79 channels (of 1MHz each), 1600hops/s
Coexistence of multiple piconets: like CDMA
Links: synchronous connections and asynchronous connectionless
Interoperability: protocol stack supporting TCP/IP, OBEX, SDP
Range: 10 meters, can be extended to 100 meters
Documentation: over 1000 pages specification
Bluetooth Application Areas
Data and voice access points
Real-time voice and data transmissions
Cable replacement
Eliminates need for numerous cable attachments for connection
Low cost < $5
Ad hoc networking
Device with Bluetooth radio can establish connection with another when in range
Protocol Architecture
Bluetooth is a layered protocol architecture
Core protocols
Cable replacement and telephony control protocols
Adopted protocols
Core protocols
Radio
Baseband
Link manager protocol (LMP)
Logical link control and adaptation protocol (L2CAP)
Service discovery protocol (SDP)
Usage Models
File transfer
Internet bridge
LAN access
Synchronization
Three-in-one phone
Headset
Piconets and Scatternets
Piconet
Basic unit of Bluetooth networking
Master and one to seven slave devices
Master determines channel and phase
Scatternet
Device in one piconet may exist as master or slave in another piconet
Allows many devices to share same area
Makes efficient use of bandwidth
[attachment=40841]
Bluetooth
Consortium: Ericsson, Intel, IBM, Nokia, Toshiba…
Scenarios:
connection of peripheral devices
loudspeaker, joystick, headset
support of ad-hoc networking
small devices, low-cost
bridging of networks
e.g., GSM via mobile phone - Bluetooth - laptop
Simple, cheap, replacement of IrDA, low range, lower data rates, low-power
Worldwide operation: 2.4 GHz
Resistance to jamming and selective frequency fading:
FHSS over 79 channels (of 1MHz each), 1600hops/s
Coexistence of multiple piconets: like CDMA
Links: synchronous connections and asynchronous connectionless
Interoperability: protocol stack supporting TCP/IP, OBEX, SDP
Range: 10 meters, can be extended to 100 meters
Documentation: over 1000 pages specification
Bluetooth Application Areas
Data and voice access points
Real-time voice and data transmissions
Cable replacement
Eliminates need for numerous cable attachments for connection
Low cost < $5
Ad hoc networking
Device with Bluetooth radio can establish connection with another when in range
Protocol Architecture
Bluetooth is a layered protocol architecture
Core protocols
Cable replacement and telephony control protocols
Adopted protocols
Core protocols
Radio
Baseband
Link manager protocol (LMP)
Logical link control and adaptation protocol (L2CAP)
Service discovery protocol (SDP)
Usage Models
File transfer
Internet bridge
LAN access
Synchronization
Three-in-one phone
Headset
Piconets and Scatternets
Piconet
Basic unit of Bluetooth networking
Master and one to seven slave devices
Master determines channel and phase
Scatternet
Device in one piconet may exist as master or slave in another piconet
Allows many devices to share same area
Makes efficient use of bandwidth