1. Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs)
Submission Title: [Compatible DSSS g Network Communications Proposal]
Date Submitted: [April 1, 2009]
Source: [Scott Weikel] Company [Elster Electricity]
Address: [208 South Rogers Lane; Raleigh, NC ] Voice:[ ]
Re: [ TG4 PHY Layer Proposal]
Abstract: Proposal for DSSS compatible changes for g
Purpose: Contribution to IEEE g
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
Scott Weikel, Elster Electricity

2. Compatible DSSS 802.15.4g Network Communications Proposal
May 11, 2009
IEEE g

3. Introduction Address all of the nine items listed in the PAR
Determine what would be required to change to comply with the PAR
Proposed changes that would satisfy the PAR.
Scott Weikel, Elster Electricity

4. Scope/Goals of TG4g (from the PAR)
Define an alternate PHY layer for with only those MAC modifications needed to support the PHY layer implementation
Support operation in any of the regionally available license exempt frequency bands, such as 700MHz to 1GHz, and the 2.4 GHz band
Data rate of at least 40 kbps but not more than 1000 kbps
Achieve the optimal energy efficient link margin given the environmental conditions encountered in Smart Metering deployments
Principally outdoor communications
PHY frame sizes up to a minimum of 1500 octets
Simultaneous operation for at least 3 co-located orthogonal networks
Connectivity to at least one thousand direct neighbors characteristic of dense urban deployments
Provide mechanisms that enable coexistence with other systems in the same band(s) including IEEE , and systems
Scott Weikel, Elster Electricity

5. Proposal to Address Goals of TG4
PAR: Define an alternate PHY layer for with only those MAC modifications needed to support the PHY layer implementation
Overview of Proposed PHY Layer
Only make changes to that are necessary to address PAR
Use same frequency bands
Use existing modulations
Use existing data rates
Scott Weikel, Elster Electricity

6. Proposal to Address Goals of TG4
PAR: Support operation in any of the regionally available license exempt frequency bands, such as 700MHz to 1GHz, and the 2.4 GHz band
No changes to needed
already supports the following bands
868MHz,
917MHz
2450 MHz
Scott Weikel, Elster Electricity

7. Proposal to Address Goals of TG4
PAR: Data rate of at least 40 kbps but not more than 1000 kbps
No changes to needed
already supports
20kbps
40kbps
100kbps
250kbps
Scott Weikel, Elster Electricity

8. Proposal to Address Goals of TG4
PAR: Achieve the optimal energy efficient link margin given the environmental conditions encountered in Smart Metering deployments
No changes to needed
Scott Weikel, Elster Electricity

9. Proposal to Address Goals of TG4
PAR: Principally outdoor communications
No changes to needed
Scott Weikel, Elster Electricity

10. Proposal to Address Goals of TG4
PAR: PHY frame sizes up to a minimum of 1500 octets
Changes are needed to
Change aMaxPHYPacketSize to 4095 octets
Change PHY Header to 2 or 3 octets to allow larger payload
Could expand Frame Check Sequence
Scott Weikel, Elster Electricity

11. PHY Protocol Data Unit Existing PPDU Packet
Proposed #1 Extended PPDU Packet
Octets 1
variable
Preamble
SFD
Frame Length (7 bits)
Reserved
(1 bit)
PSDU
SHR
PHR
PHY payload
Octets 1
variable
Preamble
SFD
Frame Length (7 bits)
Extended Length (1 bit)
Upper extended addr (5 bits)
Future
(3 bits)
PSDU
SHR
PHR
PHY payload
Scott Weikel, Elster Electricity

12. PHY Protocol Data Unit Existing PPDU Packet
Octets 1
variable
Preamble
SFD
Frame Length (7 bits)
Reserved
(1 bit)
PSDU
SHR
PHR
PHY payload
Proposed #2 Extended PPDU Packet
Octets 1 2
variable
Preamble
SFD
Frame Length (7 bits)
Set value = 4
Reserved
(1 bit)
Extended Frame Length (12 bits)
Future
(4 bits)
PSDU
SHR
PHR
PHY payload
Scott Weikel, Elster Electricity

13. Proposal to Address Goals of TG4
PAR: Simultaneous operation for at least 3 co-located orthogonal networks
No changes to needed
27 channels are specified now in all bands
10 channels are specified in the 917MHz band
These channels are simultaneously available
This is efficient use of bandwidth
Scott Weikel, Elster Electricity

14. Proposal to Address Goals of TG4
PAR: Connectivity to at least one thousand direct neighbors characteristic of dense urban deployments
No changes to needed
Scott Weikel, Elster Electricity

15. Proposal to Address Goals of TG4
PAR: Provide mechanisms that enable coexistence with other systems in the same band(s) including IEEE , , and
No changes to needed
Coexistence already exists
Scott Weikel, Elster Electricity

16. Summary IEEE 802.15.4 is widely used in many successful applications
is now interoperable (within a frequency band)
PAR for 4g amendments listed only a few “improvements” needed
Scott Weikel, Elster Electricity

17. With a few simple changes we can:
Conclusion:
With a few simple changes we can:
satisfy the PAR
and maintain interoperability
Scott Weikel, Elster Electricity

18. Thank you!!