1. 120 March '12SRD MG - London Draft ETSI TS 102 887-1 PHY Standard Derived from IEEE 802.15.4g Larry Taylor, Raporteur TS 102 887-1

2. 220 March '12SRD MG - London Summary IEEE 802.15 began work on amendment 4g (Smart Utility Networks) in 2008, finishing its work at the end of 2011 ETSI ERM/TG28 began work on requirements for Smart Metering (SMEP) in late 2009 and produced –SMEP Systems Reference Document (SRDoc TR 102 886) in late 2010 –M3N requirements were added in SRDoc TR 103 055 in 2011 –A draft PHY Technical Specification (TR 102 887-1) in late 2011 –All comments were resolved at ERM TG28 #31 Feb ‘12 ETSI work on SMEP PHY was based on IEEE 802 15.4g

3. 320 March '12SRD MG - London ETSI TS 102 887-1

4. 420 March '12SRD MG - London ETSI TS 102 887-1 (1) 870-876/915-921MHz target spectrum –Band under CEPT consideration for expansion of RFID & SRD use in Europe –Primary user (Mobile Service) in 873-876/918-921MHz Extension of GSM-R –Some Military users in 870-872MHz and other sub-bands –High power RFID (4x400kHz channels) proposed for 915-921MHz band Coexistence study (WI41) will determine operating parameters –Maximum transmit power –Duty Cycle limits –Out of Band limits TS 102 887-1 designed with time constrained operation in mind for E-GSM-R coexistence –Coexistence tests at Kolberg test lab in 2009 FSK waveform envelope 200kHz channel spacing 20ms burst length High power (>100mW)

5. 520 March '12SRD MG - London ETSI TS 102 887-1 (2) Rationale & Goals –Optimize co-existence with E-GSM-R & other SRDs –Satisfy Smart Metering requirements for RF systems including RF MESH designs –Support M3N requirements for low data rate & battery operated devices High link margin for difficult propagation environment Good properties for battery powered devices –Spectrum efficiency Minimize inter- & intra-system interference & maximize capacity

6. 620 March '12SRD MG - London ETSI TS 102 887-1 (3) GFSK & O-QPSK PHY Summary

7. 720 March '12SRD MG - London OFDM PHY Summary

8. 820 March '12SRD MG - London ETSI TS 102 887-1 (4) GFSK PHY –Derived from 802.15.4g MR-FSK –Mandatory PHY –200kHz channel raster aligned with E-GSM-R –SFD signals FEC coding Simplified PHY Header compatible with IEEE 802.15.4g

9. 920 March '12SRD MG - London ETSI TS 102 887-1 (5) O-QPSK PHY –Derived from 802.15.4g MR-OQPSK PHY –Optional low data rate PHY –200 kHz channel raster –Modulation: GMSK with BT = 0.5 –6.25 kbps (chip rate is 100 kchip/s) –12.5 kbps (chip rate is 200 kchip/s) –chip pre-coding to obtain an O-QPSK type signal based on GMSK modulation –Additional fixed format PHY PDU for LDR E-GSM-R coexistence SFD signals PHY PDU type –Variable length PDU with PHY Header –Fixed format with 7 or 18 octet PSDU –Protected by header checksum

10. 1020 March '12SRD MG - London ETSI TS 102 887-1 (5) OFDM PHY –Option 1 Equivalent to IEEE 802.15.4g OFDM Option 4 200kHz spacing 50-300kbps –Option 2 Equivalent to IEEE 802.15.4g OFDM Option 3 400kHz spacing 50-600kbps Owing to larger occupied bandwidth may required special regulatory consideration

11. 1120 March '12SRD MG - London Meeting European Requirements From SRDoc 102 886 –100kbps 100k symbols/sec data rate –50kbps via FEC Better performance for poor links than uncoded 50kbps –Higher rates via increased symbol rate 200kbps 200k symbols/sec From SRDoc 103 055 –Low Data Rate (LDR) for battery operated devices 6.25kbps 100kcps 12.5kbps 200kcps Battery operated devices Harsh propagation environments –Fixed format PHY PDUs Fits 20ms E-GSM-R time-constrained coexistence mechanism Allows preamble sampling in other bands via concatenated PHY PDUs OFDM & Additional GFSK Modes for IEEE 802.15.4g compatibility

12. 1220 March '12SRD MG - London Summary Optimum coexistence with E-GSM-R –Data rates fit in 200kHz E-GSM-R channel raster –Low Data Rate for poor link conditions Compatible with time constrained sharing strategy –Optimum number of channels in 870-876 MHz Minimizes intra- & inter-system interference Maximizes system capacity & spectrum efficiency –Simplified implementation complexity Reduced 15.4g options where no specific advantage –IEEE 802.15.4g compatibility GFSK PHY Modes – 200kHz & 400kHz bandwidths Low Rate O-QPSK OFDM PHY Modes 3&4 –Mode 3 may require special consideration owing to wide occupied bandwidth