1. doc.: IEEE 802.15-<doc#>
<month year>
doc.: IEEE <doc#>
<November 2011>
Project: IEEE P Working Group for Wireless Personal Area Networks (WPANs)
Submission Title: [Merged FSK PHY for k]
Date Submitted: [2 November 2011 ]
Source: [Mi-Kyung Oh1, Sangsung Choi1, Kwang-Roh Park1, Matt Johnson2, Jean Schwoerer3] Company [1ETRI, 2Itron, 3Orange/Elster]
Address [2111 N Molter RD, Liberty Lake, WA 99019, USA]
Voice:[ ], FAX: [ ],
Re: [ Merged FSK Proposal for k]
Abstract: [This document describes a merged FHSS PHY that addresses the requirements of the k PAR]
Purpose: [Proposal for consideration of inclusion into the baseline for the k standard.]
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
<ETRI>,<Itron>,<Orange/Elster>
<author>, <company>

2. <November 2011>
A Merged k FSK Proposal
This proposal represents a merged FSK proposal from ETRI, Itron and Orange/Elster. Based on these previously presented proposals:
ETRI k
Itron k
Orange/Elster k
MAC features from the proposals above are not covered in this merged PHY proposal
<ETRI>,<Itron>,<Orange/Elster>

3. Agenda Considerations for a Merged PHY FSK Block Diagram
<November 2011>
Agenda
Considerations for a Merged PHY
FSK Block Diagram
PHY Parameters
Study Issues
<ETRI>,<Itron>,<Orange/Elster>

4. Considerations for a Merged FSK PHY
<November 2011>
Considerations for a Merged FSK PHY
Tunable PHY for multiple applications and regional regulations
Provide flexible options to achieve PAR goals
A path to interoperation with other rapidly deploying standards, particular 15.4g
Adopt PHY parameters that can be easily accessed by 15.4g networks
<ETRI>,<Itron>,<Orange/Elster>

5. <November 2011>
Achieving High Link Budgets in Varying Regional Regulatory Environments
Achieving a high link budget in some regions (USA) is much easier than others (Korea USN band)
e.g. +36 dBm EIRP versus +10 dBm
In challenging regulatory environments, flexibility in PHY modes of operation may be necessary. Such as use of:
Additional spreading
FSK variants
<ETRI>,<Itron>,<Orange/Elster>

6. FSK Block Diagram <November 2011>
<ETRI>,<Itron>,<Orange/Elster>

7. doc.: IEEE 802.15-<doc#>
<month year>
doc.: IEEE <doc#>
<November 2011>
System Block Diagram
PHY data flow
SHR sequence insertion
PHR Bit
FSK based
Modulation RF
Convolutional Encoder
Interleaver
Spreading
MUX
PSDU Bit
Whitening FH
Function block that can be selected based on regulation and deployment environments
* LECIM coordinator should support all the functions.
<ETRI>,<Itron>,<Orange/Elster>
<author>, <company>

8. PHY Parameters <November 2011>
<ETRI>,<Itron>,<Orange/Elster>

9. FSK Parameters phyFreqHopping phySpreading phyFECInterleaving
<November 2011>
FSK Parameters
phyFreqHopping
0: no frequency hopping
1: frequency hopping
phySpreading
0: no spreading
1: spreading
phyFECInterleaving
0: FEC & Interleaving off
1: FEC & Interleaving on
phyDataWhitening
0: Data whitening off
1: Data whitening on
phyFSKMode
0: GFSK/FSK modulation
1: PFSK modulation
In order to communicate with 4g SUN coordinator,
frequency hopping should be turned off
Spreading gain for reliable operation
in harsh LECIM channels
Already included in 4g SUN
PFSK available in more
challenging environments
<ETRI>,<Itron>,<Orange/Elster>

10. Frequency Bands and Data Rates
<November 2011>
Frequency Bands and Data Rates
Basic features
Selection features
Frequency hopping
Spreading
Modulation (e.g. PFSK)
FCC & Interleaving
Data whitening
PHY (MHz)
Frequency Band (MHz)
Modulation (Uplink/Downlink)
Data parameters
Bit rate
(kb/s)
Symbol Rate (ksymbols/s)
Symbols
863
GFSK/FSK
25/12.5
25/12.5 
Binary 
915
37.5/25/12.5
917
920
2450
Based on basic FSK features, selection features can be added.
The system designer can determine which features are required for their applications
<ETRI>,<Itron>,<Orange/Elster>

11. Total number of channels and first channel center frequencies
<November 2011>
Total number of channels and first channel center frequencies
Frequency Band (MHz)
Modulation (Uplink/Downlink)
ChanSpacing (MHz)
TotalNumChan
ChanCenterFreq0 (MHz)
 GFSK/FSK
0.1 69
0.2
129
902.2 32
917.1 15
920.6
416
2400.2
<ETRI>,<Itron>,<Orange/Elster>

12. Modulation Indices <November 2011> Modulation Index Uplink
Downlink
37.5 kbps
0.5
25 kbps
1.0
12.5 kbps
4.0
<ETRI>,<Itron>,<Orange/Elster>

13. Additional PHY Parameters
<November 2011>
Additional PHY Parameters
Description
Value
aMaxPHYPacketSize
The maximum PSDU size (in octets) the PHY shall be able to receive.
127 octets
FCS
CRC, as specified in 15.4g
2/4 octets
Preamble
‘ ’
4 to 1000 octets*
SFD
Repetition of 15.4g SFD sequence 
4 or 8 octets+
* Further refinement of this value may be required as implications for battery life are studied.
+ Further refinement of this value may be required as implications for battery life and performance are studied.
<ETRI>,<Itron>,<Orange/Elster>

14. <November 2011>
Study Issues
Some lower level details which need to be evaluated in terms of battery operation
<ETRI>,<Itron>,<Orange/Elster>

15. <November 2011>
Addressing
Addressing needs to support entire network not just one coordinator’s PAN
Network ID across multiple coordinators
Programmed in endpoints at installation
Uplink:
Use 64 bit source address and Network ID
Downlink:
Use 64 bit source and destination address
<ETRI>,<Itron>,<Orange/Elster>

16. Study Items SHR Information Elements: over the air versus commissioned
<November 2011>
Study Items
SHR
Preamble Length
SFD
Information Elements: over the air versus commissioned
Detailed Definition of MHR and PHR
Precise definition of best LQI/RSSI/… approach, such as:
MAC monitors and logs good and bad packet decodes per channel at coordinator (Channel identification provided by PHY)
PHY measures and logs:
Channel noise at the coordinator and/or endpoint
FEC Statistics
PHY shall be able to report LQI of decoded packets
Want a higher resolution indicator such as 2 dB steps of RSSI to support >120 dB link budget requirement
<ETRI>,<Itron>,<Orange/Elster>

17. Summary This merged FSK proposal presents an FSK PHY that provides:
<November 2011>
Summary
This merged FSK proposal presents an FSK PHY that provides:
Flexibility for deployment in multiple applications and regulatory regimes, while
Meeting the PAR requirements for high path loss environments
Maximizing the available channel coherence time
A path to interoperability with 15.4g networks
<ETRI>,<Itron>,<Orange/Elster>

18. Thank You! <November 2011>
<ETRI>,<Itron>,<Orange/Elster>