1. Submission Title: [Preamble structures for 4a]
November, 2005
Project: IEEE P Working Group for Wireless Personal Area Networks (WPANs)
Submission Title: [Preamble structures for 4a]
Date Submitted: [21 November, 2005]
Source: [Vern Brethour] Company [Time Domain Corp.]
Address [7057 Old Madison Pike; Suite 250; Huntsville, Alabama 35806; USA]
Voice:[(256) ], FAX: [(256) ],
Re: [ a.]
Abstract: [Using the preamble delimiter to signal the use of the optional low data rate.]
Purpose: [To promote discussion in a.]
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
Brethour, Time Domain

2. November, 2005
We agreed in Vancouver to optionally support a data rate 1/8 of the mandatory nominal 1 Meg Bit / sec.
That seems like a good idea.
How do we actually make it work?
Brethour, Time Domain

3. November, 2005
How does the node who is out of range at the mandatory data rate announce himself?
Nodes must initially announce themselves at the mandatory 1 MBit/sec rate.
Failing to get a response at the mandatory rate, nodes implementing the optional 128K mode would be allowed to announce themselves at the low rate.
PAN coordinators implementing the optional low data rate can respond at the low rate.
Brethour, Time Domain

4. A Special Delimiter for 128K Bits?
November, 2005
A Special Delimiter for 128K Bits?
Normal preamble -S -S S S S S S -S -S -S -S
Preamble for 128 K bit/sec -S -S S S S S S -S -S -S -S
Delimiter must still be appropriately scaled with preamble length.
Brethour, Time Domain