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Final proposal for 802.15.4j MBANS

Final proposal for 802.15.4j MBANS. Date: July 5 , 20 11. Authors:. 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. PHY.

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Final proposal for 802.15.4j MBANS

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  1. Final proposal for 802.15.4j MBANS Date: July 5, 2011 Authors:

  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

  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

  4. 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

  5. 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

  6. MAC enhancement • Channel switch notification • Channel switch command with time, channel information

  7. MAC enhancement • Channel switch notification Broadcast/ Multicast Unicast

  8. MAC enhancement • MLME-primitives

  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.

  10. MAC enhancement • Guaranteed Time Slot (GTS) • Drawback • Not-suitable for long interval application • Inefficient resource allocation Legacy GTS

  11. MAC enhancement • Periodic GTS • Advantage • Suitable for MBANS application • Efficient resource allocation • Low additional overhead Periodic GTS

  12. Channelization • Channelization issue • Guard band (0.5 MHz) • Overlapped, non-overlapped • Number of channel • Our proposal for MBAN channelization

  13. 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

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