doc.: IEEE 802.15-<doc#> <month year> doc.: IEEE 802.15-<doc#> Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs) Submission Title: [PHY pre-proposal for PAC low rate services] Date Submitted: [May 2013] Source: [Tae-Joon Park*, Jae-Min Ahn**, Keun Hyung Lee*, Wun-Cheol Jeong*, Chang-Sub Shin*, Hoyong Kang*] Company: [*ETRI, **Chungnam National Univ.] E-Mail:[*tjpark@etri.re.kr, **jmahn@cnu.ac.kr] Re: [] Abstract: 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. <author>, <company>

PHY pre-proposal for PAC low rate services <month year> doc.: IEEE 802.15-<doc#> PHY pre-proposal for PAC low rate services Tae-Joon Park*, Jae-Min Ahn**, Keun Hyung Lee*, Wun-Cheol Jeong*, Chang-Sub Shin*, Hoyong Kang* *ETRI, **Chungnam National Univ <author>, <company>

Target services Social Networking Presence indicator with updates SHOPPING/ ENTERTAINING – Advertisement Commercial Broadcast SMART ENVIRONMENT - Home/ Office (Device based) Personalized machine confguration and Management (smart office or home) - no S/W downloads HEALTH / Energy- Monitoring/Service Large network machine type communication Peer-aware Monitoring/Assistance Public Safety Support/Service Hazard Notification Public Emergency TRAFFIC/TRANSPORTATION - Road/Train/Airport Police/Public Helps Roadside Assistance - Congestions, Accident (fast), Event Communication Interactive Transportation Management

Requirements Especially for Emergencies : Longer battery life Relatively low rate Simple HW Relatively longer distance Viability is more important than the transmission rate !

Encoding Discovery mode PHY As simple as possible Error detection and retransmission only Reducing the decoder complexity 8-bit CRC would be OK Communication mode PHY Optimized for low energy services Error control coding Adaptive to channel change Multi-rate Asymmetric topology

Preamble Purpose of preamble Signal detection AGC synchronization AFC : frequency synchronization Symbol synchronization Frame synchronization Etc. Preamble sequence candidates CAZAC sequence M-sequence Barker code Gold code

Example of transmitter structure SHR : Common Preamble, SFD(mode) PHR/PSDU : Discovery / Communication mode Communication mode information Spreading/ scramble Scramble Preamble MUX Modulation Modulated Signal Error control coding Add CRC Discovery mode

PHY parameters Band candidates : Sub-1GHz, 2.4GHz Data rate and Bandwidth Discovery mode PHY 50Kbps, 200KHz Communication mode PHY Multi-rate Ex) 50/100/200/400 Kbps, 400 KHz