IEE1451.5QoS

1
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
2
Bluetooth TII
Wired Network
NCAP maps QoS requirement to Bluetooth Connection
Management Protocol
System sends QoS Requirement per STIM to NCAP
NCAP
Bluetooth TII using SPP profile as transport for
IEEE1451 protocols and Bluetooth Connection
Management protocol
HHD
NCAP adds new STIMs and reconfigures STIM
Connection State
HHD can interrogate and reconfigure STIM
STIM SDP record contains Connection Management
data
STIM
STIM
STIM
3
Bluetooth NCAP
Wired Network
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
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
NCAP initial Connection State must allow
connection
HHD
NCAP SDP record contains Connection Management
data
NCAP
HHD can interrogate and reconfigure NCAP/STIM
STIM
STIM
4
Bluetooth NCAP and TII
Wired Network
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
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
HHD
NCAP SDP record contains Connection Management
data
NCAP
HHD can interrogate and reconfigure NCAP and STIM
STIM
STIM
Bluetooth TII using SPP
5
Bluetooth Multihop Routing
Wired Network
PAN NAP
Multi-hop capability can be added when supported
by PAN routing
NCAP
NCAP
STIM
STIM
Bluetooth TII using SPP
6
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

7
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