Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs) Submission Title: [Compatible DSSS 802.15.4g Network Communications Proposal] Date Submitted: [April 1, 2009] Source: [Scott Weikel] Company [Elster Electricity] Address: [208 South Rogers Lane; Raleigh, NC 27610] Voice:[919-212-4866] E-Mail: [scott.j.weikel@us.elster.com] Re: [802.15.TG4 PHY Layer Proposal] Abstract: Proposal for DSSS compatible changes for 802.15.4g Purpose: Contribution to IEEE 802.15.4g Notice: This document has been prepared to assist the IEEE P802.15. 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 P802.15. Scott Weikel, Elster Electricity

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

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

Scope/Goals of TG4g (from the PAR) Define an alternate PHY layer for 802.15.4 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 802.11, 802.15 and 802.16 systems Scott Weikel, Elster Electricity

Proposal to Address Goals of TG4 PAR: Define an alternate PHY layer for 802.15.4 with only those MAC modifications needed to support the PHY layer implementation Overview of Proposed PHY Layer Only make changes to 802.15.4 that are necessary to address PAR Use same frequency bands Use existing modulations Use existing data rates Scott Weikel, Elster Electricity

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 802.15.4 needed 802.15.4 already supports the following bands 868MHz, 917MHz 2450 MHz Scott Weikel, Elster Electricity

Proposal to Address Goals of TG4 PAR: Data rate of at least 40 kbps but not more than 1000 kbps No changes to 802.15.4 needed 802.15.4 already supports 20kbps 40kbps 100kbps 250kbps Scott Weikel, Elster Electricity

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 802.15.4 needed Scott Weikel, Elster Electricity

Proposal to Address Goals of TG4 PAR: Principally outdoor communications No changes to 802.15.4 needed Scott Weikel, Elster Electricity

Proposal to Address Goals of TG4 PAR: PHY frame sizes up to a minimum of 1500 octets Changes are needed to 802.15.4 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

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

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

Proposal to Address Goals of TG4 PAR: Simultaneous operation for at least 3 co-located orthogonal networks No changes to 802.15.4 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

Proposal to Address Goals of TG4 PAR: Connectivity to at least one thousand direct neighbors characteristic of dense urban deployments No changes to 802.15.4 needed Scott Weikel, Elster Electricity

Proposal to Address Goals of TG4 PAR: Provide mechanisms that enable coexistence with other systems in the same band(s) including IEEE 801.11, 802.15, and 802.16 No changes to 802.15.4 needed Coexistence already exists Scott Weikel, Elster Electricity

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

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

Thank you!!