Download IEE1451.5QoS - IEEE-SA

IEEE P1451.5 Wireless Sensor Interface Working Group
Wireless QoS Model
Peter Flittner
Cambridge Silicon Radio
Science Park,Milton Road
Cambridge, CB4 0WH, United Kingdom
Tel: +44 1223 692000
www.csr.com
www.btdesigner.com
Bluetooth TII
Wired Network
NCAP maps QoS
requirement to Bluetooth
Connection Management
Protocol
NCAP adds new STIMs
and reconfigures STIM
Connection State
STIM SDP record
contains Connection
Management data
STIM
NCAP
System sends QoS
Requirement per
STIM to NCAP
Bluetooth TII using SPP profile as
transport for IEEE1451 protocols
and Bluetooth Connection
Management protocol
HHD
STIM
HHD can
interrogate and
reconfigure STIM
STIM
Bluetooth NCAP
Wired Network
PAN Network Access Point
(NAP) acts as gateway and
router from wired network
(possibly IP based) to Bluetooth.
NAP can be standard
commercial product
NCAP SDP record
contains Connection
Management data
PAN
NAP
System sends QoS Requirement per
STIM to NCAP via NAP. NAP
routing issues are solved by IETF
for IP networks or by wired network
standard
NCAP initial
Connection State must
allow connection
HHD
NCAP
STIM
STIM
HHD can
interrogate and
reconfigure
NCAP/STIM
Bluetooth NCAP and TII
Wired Network
PAN Network Access Point
(NAP) acts as gateway and
router from wired network
(possibly IP based) to Bluetooth.
NAP can be standard
commercial product
PAN
NAP
System sends QoS Requirement per
STIM to NCAP via NAP. NAP
routing issues are solved by IETF
for IP networks or by wired network
standard
HHD
NCAP SDP record
contains Connection
Management data
STIM
NCAP
Bluetooth TII using SPP
STIM
HHD can
interrogate and
reconfigure NCAP
and STIM
Bluetooth Multihop Routing
Wired Network
PAN
NAP
Multi-hop capability can be added
when supported by PAN routing
NCAP
NCAP
STIM
Bluetooth TII using SPP
STIM
Comments
•
Bluetooth TII is mapped to SPP profile because:
– TII is point to multipoint, with single NCAP connected to multiple STIMs
– For controllers and other NCAPS implemented on host device, SPP requires
minimal host memory and application code (virtual com ports)
– Inband signalling can be implemented as AT commands
– Sideband signalling can be implemented as an extra RFCOMM channel
– RFCOMM allows multiplexing of multiple channels on a single link
– STIM can implement Bluetooth SPP TII on a single chip Bluetooth device
– NCAP can implement Bluetooth SPP TII for multiple STIMS on a single chip
Bluetooth device
– Most commercial HHDs, PCs and mobile phones support SPP
Comments
•
Bluetooth NCAP network connection is mapped to PAN profile because:
– PAN is the logical choice for a Bluetooth network connection
– PAN U role is suitable for single chip Bluetooth radio plus transducer
– PAN NAP role acts as gateway to a wired network
– Future PAN routing methods will add multi-hop capability
– NCAP with PAN U can be implemented on a single chip Bluetooth device
– Publish subscribe and client server models of IEEE1451 are supported by PAN
– PAN allows re-use of commercial ethernet and IP technology
– Many commercial HHDs and PCs will support PAN