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802.15.3

802.15.3. Taekyoung Kwon. CAP should exist in 2.4GHz PHY. 802.15.3 channels in 2.4GHz. 802.11 b channels (1/2). 802.11 b channels (2/2). Channel time allocation (CTA). Private CTA (dependent piconet) Dynamic (regular) CTA Per superframe Subrate : one CTA per multiple superframes

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802.15.3

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  1. 802.15.3 Taekyoung Kwon

  2. CAP should exist in 2.4GHz PHY

  3. 802.15.3 channels in 2.4GHz

  4. 802.11b channels (1/2)

  5. 802.11b channels (2/2)

  6. 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)

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

  8. MAC frame format

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

  10. Frame control Fragmentation control

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

  12. Piconet mode

  13. Information elements

  14. Information elements

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

  16. Association request command ms order PNC capabilities PNC rating

  17. Dev capabilities Dev utility Association reply command

  18. 2048 64

  19. Power management (PM) • PS set • 0x00: APS • 0x01: PSPS • 0x02 – 0xFD: DSPS sets • Wake beacon interval • PSPS: 2 – 256 • DSPS: 2 - 65536

  20. 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

  21. 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

  22. Parent vs child piconet

  23. 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

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