ieee 802.15-11-0472-00-004j july 2011 suhwook kim, lg electronics submission final proposal for...
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IEEE 802.15-11-0472-00-004j
July 2011
Suhwook Kim, LG ElectronicsSubmission
Final proposal for 802.15.4j MBANS
Authors:
Date: July 5, 2011
Name Company Address Phone email
Suhwook Kim LG ElectronicsLG R&D Complex 533, Hogye-1dong, Dongan-gu, Anyang-shi, Kyungki-do, Korea
+82-31-450-1936
Junho Jo LG ElectronicsLG R&D Complex 533, Hogye-1dong, Dongan-gu, Anyang-shi, Kyungki-do, Korea
+82-31-450-1911
Jaewon Lim LG ElectronicsLG R&D Complex 533, Hogye-1dong, Dongan-gu, Anyang-shi, Kyungki-do, Korea
+82-31-450-1936
Bonghoe Kim LG ElectronicsLG R&D Complex 533, Hogye-1dong, Dongan-gu, Anyang-shi, Kyungki-do, Korea
+82-31-450-4131
Slide 1
IEEE 802.15-11-0472-00-004j
July 2011
Suhwook Kim, LG ElectronicsSubmission Slide 2
MBAN Regulation
• 2360~2390 MHz– Indoor only, 1mW/MHz Tx power limit
– Electronic key/Beacon: an electronic frequency authorization generated by the MBANS coordinator
• 2390~2400 MHz– Anywhere, 20mW/MHz Tx power limit
IEEE 802.15-11-0472-00-004j
July 2011
Suhwook Kim, LG ElectronicsSubmission Slide 3
PHY
• Reuse of existing 802.15.4 implementations operating in the 2450 MHz band– DSSS PHY employing O-QPSK modulation
– Fc=2405 + 5(k-11), for k=11,12, …, 26
– 62.5 ksymbol/s
– 250 kbps
IEEE 802.15-11-0472-00-004j
July 2011
Suhwook Kim, LG ElectronicsSubmission
Problem Statement
• Necessary function for MBANS– Enablement mechanism
– Deenablement mechanism
• Baseline spec (802.15.4-2006) can support these function without any changes– Beacon frame
– (De)Association scheme
Slide 4
IEEE 802.15-11-0472-00-004j
July 2011
Suhwook Kim, LG ElectronicsSubmission
Problem Statement
• However, some characteristic of MBANS should be considered– Long beacon period: Long scanning time (additional power
consumption for scanning)
– Channel transition by MBAN coordinator
– Heterogeneous channelization
• We cannot guarantee network re-access time after deenablement
Slide 5
IEEE 802.15-11-0472-00-004j
July 2011
Suhwook Kim, LG ElectronicsSubmission
MAC enhancement
• Channel switch notification– Channel switch command with time, channel information
Slide 6
IEEE 802.15-11-0472-00-004j
July 2011
Suhwook Kim, LG ElectronicsSubmission Slide 7
MAC enhancement
• Channel switch notification
UnicastBroadcast/ Multicast
IEEE 802.15-11-0472-00-004j
July 2011
Suhwook Kim, LG ElectronicsSubmission Slide 8
MAC enhancement
• MLME-primitives
IEEE 802.15-11-0472-00-004j
July 2011
Suhwook Kim, LG ElectronicsSubmission Slide 9
MAC enhancement
• Channel switch information– Timestamp: The time at which the channel switching will be
occurred.
– Logical Channel: The logical channel which is chosen by the coordinator and the MBAN device shall switch to.
– Channel Page: The channel page which is chosen by the coordinator and the MBAN device shall switch to.
IEEE 802.15-11-0472-00-004j
July 2011
Suhwook Kim, LG ElectronicsSubmission
MAC enhancement
• Guaranteed Time Slot (GTS)– Drawback
• Not-suitable for long interval application
• Inefficient resource allocation
Slide 10
Legacy GTS
IEEE 802.15-11-0472-00-004j
July 2011
Suhwook Kim, LG ElectronicsSubmission
MAC enhancement
• Periodic GTS– Advantage
• Suitable for MBANS application
• Efficient resource allocation
• Low additional overhead
Slide 11
Periodic GTS
IEEE 802.15-11-0472-00-004j
July 2011
Suhwook Kim, LG ElectronicsSubmission
Channelization
• Channelization issue– Guard band (0.5 MHz)
– Overlapped, non-overlapped
– Number of channel
• Our proposal for MBAN channelization
Slide 12
IEEE 802.15-11-0472-00-004j
July 2011
Suhwook Kim, LG ElectronicsSubmission
Conclusion
• We this submission, we propose the MAC enhancement for MBANS– Channel switch notification
– Periodic GTS
• This proposal is based on reused PHY and our channelization model
Slide 13