1. doc.: IEEE 802.15-<doc#>
<month year>
doc.: IEEE <doc#>
Project: IEEE P 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.]
Re: []
Abstract:
Notice: This document has been prepared to assist the IEEE P 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 P
<author>, <company>

2. PHY pre-proposal for PAC low rate services
<month year>
doc.: IEEE <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>

3. 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

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

5. 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

6. 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

7. 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

8. 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