1. doc.: IEEE 802.15-<doc#>
<month year>
doc.: IEEE <doc#>
Nov 2012
Project: IEEE P Working Group for Wireless Personal Area Networks (WPANs)
Submission Title: [Topics for 4q ULP PHY Amendment]
Date Submitted: [Nov 9th, 2012]
Source: [Rick Powell]
Company [Microsemi-Zarlink]
Address [15822 Bernardo Center Dr, Ste B, San Diego, CA, 92127]
Voice:[ ]
FAX :[ ] ]
Re: [In response to TG4q PAR]
Abstract: [This presentation provides a list of some of the PHY characteristics needing consideration for possible modification for ULP operation. In some cases, changes from 15.4g and 15.4k are referenced.]
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
Rick Powell (Microsemi)
Rick Powell (Microsemi)

2. Topics for ULP PHY Amendment
Nov 2012
Topics for ULP PHY Amendment
Nov 9, 2012
Rick Powell, Microsemi-Zarlink
Rick Powell (Microsemi)

3. July 2012
doc.: IEEE /0626r0
Nov 2012
Abstract
This presentation provides a list of some of the PHY characteristics needing consideration for possible modification for ULP operation. In some cases, changes from 15.4g and 15.4k are referenced.
Rick Powell (Microsemi)
Rick Powell (Microsemi)

4. ULP PHY Characteristics
Nov 2012
ULP PHY Characteristics
Frequency Bands
Channel Spacing
Data Rates
Symbol Rates
Modulation
For Example, Constant Envelope for ULP – FSK/GFSK/GMSK
Receiver Sensitivity (Increased in 15.4g and 15.4k)
Consider lower sensitivity for ULP
Receiver Interference Rejection (Increased in 15.4g and 15.4k)
Consider lower Interference Rejection for ULP
Rick Powell (Microsemi)

5. ULP PHY Characteristics (cont.)
Nov 2012
ULP PHY Characteristics (cont.)
Preamble (Length and Pattern)
Start-of-Frame Delimiter (SFD) (Length and Pattern)
PHY Header Format and Contents
PSDU Maximum Size (aMaxPHYPacketSize)
FEC Type
Interleaving / Spreading
Whitening
Turn-Around Time (aTurnaroundTime) (increased in 15.4g and 15.4k)
InterFrame Separation (macSIFSPeriod, macLIFSPeriod)
Channel Switch Time (added to 15.4g and 15.4k)
Slide 5
Rick Powell (Microsemi)

6. Information in PHY Header
Nov 2012
Information in PHY Header
PSDU Length
Number of bits in field determined by max length (aMaxPHYPacketSize)
Maximum went from 127 to 2047 in 15.4g and 15.4k
FCS and/or Parity on PHY Header
Protects against false correlation
Protects against error in length field
Parity added to 15.4k PHY Header
Parity added to 15.4g Mode Switch PHY Header
FSC included in 15.6 PHY Header
Slide 6
Rick Powell (Microsemi)

7. Information in PHY Header (cont.)
Nov 2012
Information in PHY Header (cont.)
Rate Change in PHY Header (no PSDU) for next PPDU
Rate Change PPDU added to 15.4g
Not supported in 15.4k
No Addressing included
Does not support asymmetric rates
Once sent, eliminates slow PHY Header overhead
Rate in PHY Header affecting current PSDU
Dynamic rate switch at beginning of PSDU
Supports asymmetric rates
Rate change only affects current PPDU
Simplified rate change coordination
Added overhead of slowest rate PHY Header
Included in 15.6
Slide 7
Rick Powell (Microsemi)

8. Information in PHY Header (cont.)
Nov 2012
Information in PHY Header (cont.)
Other possible PHY Header Info
Whitening Seed (15.6) or Whitening On/Off (15.4g Rate Change PPDU)
FEC On/Off (15.4g Rate Change PPDU)
FCS Type (15.4g and 15.4k)
PHY Header Type (15.4g)
Burst Mode (15.6)
Slide 8
Rick Powell (Microsemi)