Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs)

1. Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs) Submission Title: [Final proposal for 802.15.4j MBANS] Date Submitted: [18 July 2011] Source: [Suhwook Kim] Companies [LG Electronics] Address [LG R&D Complex 533, Hogye-1dong, Dongan-gu, Anyang-shi, Kyungki-do, Korea] Voice:[+82-31-450-1936], FAX: [+82-31-450-4049], E-Mail:[suhwook.kim@lge.com] Re: TG4j Call for Proposals document number 15-11-0095 [If this is a response to a Call for Contributions, cite the name and date of the Call for Contributions to which this document responds, as well as the relevant item number in the Call for Contributions.] [Note: Contributions that are not responsive to this section of the template, and contributions which do not address the topic under which they are submitted, may be refused or consigned to the “General Contributions” area.] Abstract: Proposes the MAC enhancement for 802.15.4j MBANS Purpose: For consideration by TG4j in response to the Call for Proposals (15-11-0095) as a proposal that meets all of the Technical Requirements. Notice: This document has been prepared to assist the IEEE P802.15. It is offered as a basis for discussion and is not binding on the contributing individual(s) or organization(s). The material in this document is subject to change in form and content after further study. The contributor(s) reserve(s) the right to add, amend or withdraw material contained herein. Release: The contributor acknowledges and accepts that this contribution becomes the property of IEEE and may be made publicly available by P802.15.

2. Final proposal for 802.15.4j MBANS Date: July 18, 2011 Authors:

3. MBAN Regulation • 2360~2390 MHz band • Indoor only • 1mW/MHz Tx power limit • Electronic key/Beacon: an electronic frequency authorization generated by the MBANS coordinator • 2390~2400 MHz band • Anywhere • 20mW/MHz Tx power limit

4. PHY • Reuse of existing 802.15.4 implementations operating in the 2450 MHz band • DSSS PHY employing O-QPSK modulation • Channels: Fc=2405 + 5(k-11), for k=11,12, …, 26 • Symbol rate: 62.5 ksymbol/s • Data rate: 250 kbps

5. Problem Statement • Necessary function for MBANS • Electronic Key mechanism • (De)Enablement mechanism • Baseline spec (802.15.4-2006) can support these function without any changes • Beacon frame • (De)Association scheme

6. Problem Statement • However, some characteristic of MBANS should be considered • Channel transition by MBAN coordinator • Long beacon period: Long scanning time (additional power consumption for scanning) • Heterogeneous channelization • We cannot guarantee network re-access time after deenablement • MBAN devices should scan all channels

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

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

9. MAC enhancement • MLME-primitives

10. 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.

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

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

13. Channelization • Our proposal for MBAN channelization • 9 channels • 2360 ~ 2390 MHz: Non-overlapped 6 channels • 2390 ~ 2400 MHz: Overlapped 3 channels

14. Conclusion • In 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