1. Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs)
Submission Title: [FHSS Neighborhood Area Network Communications Proposal]
Date Submitted: [May 2, 2009]
Source: [David Hart] Company [Elster Electricity]
Address: [208 South Rogers Lane; Raleigh, NC ] Voice:[ ]
Re: [ TG4g PHY Layer Proposal]
Abstract: Proposal for new PHY layer to support g Task Group and associated PAR
Purpose: Proposal for FHSS PHY layer for Neighborhood Area Network addition to
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
David Hart, Elster Electricity

2. Neighborhood Area Networks
Proposal to TG4g
Neighborhood Area Networks
May 2, 2009
IEEE
David Hart, Elster Electricity

3. Scope/Goals of TG4g
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
David Hart, Elster Electricity

4. Proposal to Address Goals of TG4g
Define an alternate PHY layer for with only those MAC modifications needed to support the PHY layer implementation
Overview of Proposed PHY Layer
FSK modulation
400 kHz channel spacing to support higher data rates
Programmable output power (to suit various device types)
Supports data rates of 60 and 240 kbps
David Hart, Elster Electricity

5. Proposal to Address Goals of TG4g
Support operation in any of the regionally available license exempt frequency bands, such as 700MHz to 1GHz, and the 2.4 GHz band
Proposal supports operation in 868 MHz, 915 MHz, and 2.4 GHz bands
David Hart, Elster Electricity

6. Proposal to Address Goals of TG4g
Data rate of at least 40 kbps but not more than 1000 kbps
Proposed PHY Layer
Supports data rates of 60 and 240 kbps
Data rate allowed to vary based on device type and number of desired channels
Provides a low data rate for simple low end devices, while also providing a higher data rate for large data/message transport
David Hart, Elster Electricity

7. Proposal to Address Goals of TG4g
Achieve the optimal energy efficient link margin given the environmental conditions encountered in Smart Metering deployments
Proven operation in outdoor environments
Proven operation with all types of smart meters (electric, gas, water, etc)
Proven communications bridge to in-home devices
Supports communications from outdoor devices into the home
Both single family residential and multi-unit structures (e.g. apartment complexes)
David Hart, Elster Electricity

8. Proposal to Address Goals of TG4g
Principally outdoor communications
Communication backbone is principally outdoors, BUT it is critical to get from the meter into the home
Must get from outdoor devices into the home
Must support multi-home dwellings
David Hart, Elster Electricity

9. Proposal to Address Goals of TG4g
PHY frame sizes up to a minimum of 1500 octets
Simple PHY frame structure
Variable frame size up to 4095 octet PHY payload (PSDU)
Support for very large payloads
Data whitening performed as software algorithm – no PHY space required for whitening
David Hart, Elster Electricity

10. Proposal to Address Goals of TG4g
Simultaneous operation for at least 3 co-located orthogonal networks
In 915 MHz band:
64 channels available for standard operation (240 kbps)
128 channels available for low data rate mode (60 kbps)
In 2.4 GHz band:
207 channels available for standard operation (240 kbps)
414 channels available for low data rate mode (60 kbps)
David Hart, Elster Electricity

11. Proposal to Address Goals of TG4g
Connectivity to at least one thousand direct neighbors characteristic of dense urban deployments
FHSS approach provides the functionality to meet these requirements
David Hart, Elster Electricity

12. Proposal to Address Goals of TG4g
Provide mechanisms that enable coexistence with other systems in the same band(s) including IEEE , , and
FHSS channel planning provides for coexistence
Proven network performance in the presence of commonly encountered interference sources
Applicable to the 868 MHz, 915 MHz, and 2.4 GHz frequency bands
David Hart, Elster Electricity

13. Proposal for TG4g Items that are critical for a FHSS amendment
Data rate must provide for today’s needs but also provide for increased data needs in the future
PHY must support a high data rate similar to what allows today (250 kbps)
PHY must allow for a slower data rate for simple or power constrained devices
David Hart, Elster Electricity

14. Proposal for TG4g Items that are critical for a FHSS amendment
Must support different types of devices
Powered or “always on” devices
Battery powered, or “sleeping” devices
Standard should not be limited to utility networks, but for utility networks, it must handle:
Electric
Gas (battery powered)
Water (battery powered)
Networks must function from same communication platform
Not acceptable to just co-exist
Electric, water, and gas must be interoperable
David Hart, Elster Electricity

15. Thank you!!
           
David Hart, Elster Electricity