1. doc.: IEEE 802.15-<doc#>
<month year>
doc.: IEEE <doc#>
Project: IEEE P Working Group for Wireless Personal Area Networks (WPANs)
Submission Title: Two rate DSSS for SUN
Date Submitted: 2 May, 2009
Source: Tae-Joon Park, Wun-Cheol Jeong, Hoyong Kang, Seong-Soon Joo
Company: ETRI
Address: 161 Gajeong-dong, Yuseong-gu, Daejeon, KOREA
Voice: , FAX: ,
Re:
Abstract: .
Purpose: To support the task group forming for the neighborhood area network
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. doc.: IEEE 802.15-<doc#>
<month year>
doc.: IEEE <doc#>
Two Rate DSSS for SUN
Tae-Joon Park, Wun-Cheol Jeong, Hoyong Kang, Seong-Soon Joo*
ETRI
<author>, <company>

3. What do we want to TG4g-SUN ?
Simple & compatible with IEEE
Minimal modification
coexistence with IEEE based networks
Two rate options
Basic Rate (below 250 Kbps)
IEEE compatible (Below 127 Bytes long)
DSSS PHY O-QPSK
Extended Rate (over 250 Kbps and below 750Kbps)
Minimize a change
Reducing the spreading gain

4. 1. Basic Rate
Below 250 Kbps
For the case of 127 Bytes long or under, it can support backward compatibility on the condition that;
Normally CRC-16, Optionally CRC-32
Symbol-to-chip mapping table is the same as that of IEEE MHz O-QPSK PHY Specification provides
The commercial deployment has been delayed since the technology for this application has not yet been decided upon.

5. 2. Extended Rate Over 250 Kbps and below 750Kbps
Minimizing the modification to the IEEE
Reducing the spreading gain
Data symbol
(Binary)
b0 b1 b2 p
Chip Values
c0 c1 c2 c3 -1 +1

6. What we want to TG4g-SUN is…
IEEE is already verified in the market.
But it has some limitations to use in various applications.
TG4g-SUN may make up for the weak points of it.
We tried to think the matter over carefully, and made a proposal with simple and minimal modification