1.
Taekyoung Kwon

3. CAP should exist in 2.4GHz PHY

4. channels in 2.4GHz

5. 802.11b channels (1/2)

6. 802.11b channels (2/2)

7. Channel time allocation (CTA)
Private CTA (dependent piconet)
Dynamic (regular) CTA
Per superframe
Subrate : one CTA per multiple superframes
Pseudo-static CTA
Can use CTA without listening up to mMaxLostBeacons (4)

8. Transmission power control
Beacon, CAP: set maximum power
CTA: increase/decrease power

9. MAC frame format

10. Addressing (DEVID) 0x00: PNC 0xF7 .. 0xFC: neighbor piconets (NbrID)
0xFD: multicast frames (McstID)
0xFE: unassociated DEVs (UnassocID)
0xFF: broadcast frames (BcstID)

11. Frame control
Fragmentation control

12. Beacon frame (header omitted)
IEEE address
us resolution
1ms -65,535 us
MCTA allocation rate

13. Piconet mode

14. Information elements

15. Information elements

16. CTA
Start time
(in us)
duration
(in us)

17. Association request command
ms order
PNC capabilities
PNC rating

18. Dev capabilities
Dev utility
Association reply command

19. 2048 64

20. Power management (PM) PS set Wake beacon interval 0x00: APS 0x01: PSPS
0x02 – 0xFD: DSPS sets
Wake beacon interval
PSPS: 2 – 256
DSPS:

21. MAC functionalities Start/maintain piconet (beacon)
Join/leave (association/disassociation)
Channel access
Channel-time request/allocation
Fragmentation/defragmentation
ACK/retransmission
Dynamic channel selection
Transmission power control
Power saving/management

22. Start/maintain piconet
Parent piconet
Child piconet
Neighbor piconet
PNC is not a member of the parent piconet
Channel scan
Passive scan (look for PNC’s beacon)
Open scan (any beacon frame)
Collect statistics and rate channels
Remote scan
PNC broadcasts beacon periodically

23. Parent vs child piconet

24. Start/maintain piconet
caveat
Child piconet member cannot directly send frame to parent piconet member
Neighbor piconet
no free channels
No secure relationship
Still association is required