ieee 802.15-11-0472-00-004j july 2011 suhwook kim, lg electronics submission final proposal for...

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

suhwook.kim@lge.com

Junho Jo LG ElectronicsLG R&D Complex 533, Hogye-1dong, Dongan-gu, Anyang-shi, Kyungki-do, Korea

+82-31-450-1911

junho.jo@lge.com

Jaewon Lim LG ElectronicsLG R&D Complex 533, Hogye-1dong, Dongan-gu, Anyang-shi, Kyungki-do, Korea

+82-31-450-1936

jaewon.lim@lge.com

Bonghoe Kim LG ElectronicsLG R&D Complex 533, Hogye-1dong, Dongan-gu, Anyang-shi, Kyungki-do, Korea

+82-31-450-4131

bonghoe.kim@lge.com

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