May 2009 Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs) Submission Title: [Power and Spectrum Efficient PHY Proposal for 802.15.4g] Date Submitted: [ 01 May, 2009] Source: [Khanh Tuan Le] Company [Texas Instruments] [Per Torstein Roine] Company [Texas Instruments] Address [Gaustadalleen 21, 0349 Oslo, Norway] Voice: [+47 22958535], E-Mail:[k.t.le@ti.com] Re: [] Abstract: [Power and Spectrum Efficient PHY Proposal for 802.15.4g.] Purpose: [Technical proposal. Presented to the 802.15.4g SUN Task Group for consideration.] 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. Khanh Tuan Le

Power and Spectrum Efficient PHY Proposal for 802.15.4g May 2009 Power and Spectrum Efficient PHY Proposal for 802.15.4g IEEE 802 Interim Meeting May 2009, Montreal, Quebec Khanh Tuan Le Khanh Tuan Le

doc.: IEEE 802.15-<doc#> <month year> doc.: IEEE 802.15-<doc#> May 2009 OVERVIEW Introduction Gaussian Frequency-Shift Keying (GFSK) Proposal Description at 863-870 MHz for Europe Proposal Description at 902-928 MHz for the USA Proposal at 470-510 MHz for China Forward Error Correction (FEC), Whitening and Packet Format Discussion Khanh Tuan Le <author>, <company>

doc.: IEEE 802.15-<doc#> <month year> doc.: IEEE 802.15-<doc#> May 2009 Introduction (1) This proposal is built upon the preliminary proposal as submitted in the document IEEE 802.15-09-0135-01-004g. Focus on user requirements, available frequency spectrum and applicable regulations for systems operating in the license exempt bands in the USA, Europe and other regions in the world Reliable networks using the relatively simple and constant envelope modulation scheme GFSK Multi channel support Khanh Tuan Le <author>, <company>

doc.: IEEE 802.15-<doc#> <month year> doc.: IEEE 802.15-<doc#> May 2009 Introduction (2) Sub-1 GHz wireless systems are beneficial (power, range) in many metering applications Spectral (and spectrum) efficiency increasingly more important Need for higher data rates Strong drive for standardization Semiconductor technology requirements Power optimized and cost efficient system solutions Flexibility Khanh Tuan Le <author>, <company>

Gaussian Frequency Shift Keying (GFSK) <month year> doc.: IEEE 802.15-<doc#> May 2009 Gaussian Frequency Shift Keying (GFSK) FSK derivative- Constant amplitude modulation Use of power efficient transmitter architectures and circuitry Gaussian shaping provides better spectral efficiency. GFSK can be efficiently implemented on silicon radios and is widely used today 2-GFSK (1 bit/symbol) / 4-GFSK (2 bit/symbol) Khanh Tuan Le <author>, <company>

Example of GFSK vs. FSK Signal <month year> doc.: IEEE 802.15-<doc#> May 2009 Example of GFSK vs. FSK Signal TO BE UPDATED Khanh Tuan Le <author>, <company>

doc.: IEEE 802.15-<doc#> <month year> doc.: IEEE 802.15-<doc#> May 2009 Proposal Description for Systems Operating at The 863-870 MHz License Exempt Band In Europe Khanh Tuan Le <author>, <company>

doc.: IEEE 802.15-<doc#> <month year> doc.: IEEE 802.15-<doc#> May 2009 863-870 MHz ISM Band in Europe ETSI 300 220 Frequency Band: 863-870 MHz Modulation and (programmable) data rates: 2-GFSK: 50 kbps and 100 kbps 4-GFSK: TBD kbps Frequency band and allowed max output power: 868.00-868.60 MHz (600 kHz): 25 mW / +14 dBm 868.70-869.20 MHz (500 kHz): 25 mW / +14 dBm 869.40-869.65 MHz (250 kHz): 500 mW / +27 dBm Frequency Agility (FA) Dynamic power control Khanh Tuan Le <author>, <company>

doc.: IEEE 802.15-<doc#> <month year> doc.: IEEE 802.15-<doc#> May 2009 EN 300 220 Sub-Bands EN 300-220-1 v2.1.1 Khanh Tuan Le <author>, <company>

doc.: IEEE 802.15-<doc#> <month year> doc.: IEEE 802.15-<doc#> May 2009 Channel Plan Sub-band channel separation: 250 kHz Number of channels: 5 Channel 1: 868.175 MHz Channel 2: 868.425 MHz Channel 3: 868.825 MHz Channel 4: 869.075 MHz Channel 5: 869.525 MHz Enable support of Frequency Agility (FA) Khanh Tuan Le <author>, <company>

Channel Plan Illustration <month year> doc.: IEEE 802.15-<doc#> May 2009 Channel Plan Illustration Khanh Tuan Le <author>, <company>

Modulation and Data Rate <month year> doc.: IEEE 802.15-<doc#> May 2009 Modulation and Data Rate 2-GFSK Modulation Index: 0.75 BT=1 Data rates: 50 kbps and 100 kbps 4-GFSK Modulation Index: TBD Data rates: TBD kbps Khanh Tuan Le <author>, <company>

Transmitter Requirements <month year> doc.: IEEE 802.15-<doc#> May 2009 Transmitter Requirements Regulated by the applicable EN 300 220 standard version Minimum output power at maximum setting: -3 dBm Transient power: Compliant with EN 300 220 Adjacent Channel Power (ACP): Compliant with EN 300 220 Spurious Emissions: Compliant with EN 300 220 Khanh Tuan Le <author>, <company>

doc.: IEEE 802.15-<doc#> <month year> doc.: IEEE 802.15-<doc#> May 2009 Max Transmit Power Channel No. Center Freq Max Output Power 1 868.175 MHz 25 mW (+14 dBm) 2 868.425 MHz 3 868.825 MHz 4 869.075 MHz 5 869.525 MHz 500 mW (+27 dBm) Khanh Tuan Le <author>, <company>

Receiver Requirements <month year> doc.: IEEE 802.15-<doc#> May 2009 Receiver Requirements RX Parameter Value Conditions Receiver sensitivity 50 kbps 2-GFSK 100 kbps 2-GFSK -92 dBm -85 dBm PER=1%, 20 bytes packet length Selectivity Adjacent Channel Rejetion Alternate Channel Rejetion 30 dB Desired channel 3dB above the sensitivity limit Blocking Performance ±2 MHz offset 50 dB Khanh Tuan Le <author>, <company>

doc.: IEEE 802.15-<doc#> <month year> doc.: IEEE 802.15-<doc#> May 2009 Proposal Description for Systems Operating at The 902-928 MHz License Exempt Band In the USA Khanh Tuan Le <author>, <company>

doc.: IEEE 802.15-<doc#> <month year> doc.: IEEE 802.15-<doc#> May 2009 ISM 902-928 MHz Band in US (1) FCC Part 15.247 Frequency Band: 902-928 MHz Modulation and (programmable) data rates: 2-GFSK: 50 kbps and 100 kbps 4-GFSK: TBD kbps Frequency band and allowed max output power: 902-928 MHz (26 MHz): 1 W / +30 dBm (500 mW / +27 dBm) Dynamic power control Frequency Hopping (FH) Flexible trade-off between communication range and data rates Khanh Tuan Le <author>, <company>

Frequency Hopping Spread Spectrum <month year> doc.: IEEE 802.15-<doc#> May 2009 Frequency Hopping Spread Spectrum Required by regulations for high transmit power levels Can be used for co-existence of multiple networks Can enable high aggregate throughput Inherent frequency diversity mechanism Well known and proven technique Required performance can be effectively achieved by semiconductor radio devices today Khanh Tuan Le <author>, <company>

doc.: IEEE 802.15-<doc#> <month year> doc.: IEEE 802.15-<doc#> May 2009 ISM 902-928 MHz Band in US (2) # Channels Channel Spacing [kHz] Modulation Data Rate [kbps] Max Output Power [dBm] 50 500 2-GFSK +30 100 4-GFSK TBD Basic FH scheme can support any of the data rates in the table and facilitate max +30 dBm output power if needed. Additional set(s) of (offset) channels could be defined to support multiple networks in the same area The offset channels would partly overlap when the highest data rates are used The main coexistence mechanism would still be the use of different hopping sequences Although networks share the same frequency range, coexistence is improved by good far-away selectivity, as the networks have a high probability of large frequency spacing at any given moment in time Multipath fading mitigation and coexistence with other networks are maximized utilizing the entire frequency band Khanh Tuan Le <author>, <company>

Co-existence of Multiple FH Networks <month year> doc.: IEEE 802.15-<doc#> May 2009 Co-existence of Multiple FH Networks Khanh Tuan Le <author>, <company>

doc.: IEEE 802.15-<doc#> <month year> doc.: IEEE 802.15-<doc#> May 2009 Proposal Description for Systems Operating at The 470-510 MHz Frequency Band In China Khanh Tuan Le <author>, <company>

doc.: IEEE 802.15-<doc#> <month year> doc.: IEEE 802.15-<doc#> May 2009 470-510 MHz Band in China Governed by the Chinese Short Range Device Regulations at 470-510 MHz Frequency Band: 470-510 MHz Utilized Frequency Band: 470-490 MHz Modulation and (programmable) data rates: 2-GFSK: 40 kbps and 75 kbps 4-GFSK: TBD kbps Max output power allowed: 50 mW / +17 dBm Dynamic power control Frequency Hopping Khanh Tuan Le <author>, <company>

doc.: IEEE 802.15-<doc#> <month year> doc.: IEEE 802.15-<doc#> May 2009 Other Regions # Channels Channel Spacing [kHz] Modulation Data Rate [kbps] Max Output Power [dBm] 3 x 30 200 2-GFSK 40 +17 75 4-GFSK TBD Additional set(s) of (offset) channels could be defined to support multiple networks in the same area The offset channels are not overlapping The main coexistence mechanism would still be the use of different hopping sequences Multipath fading mitigation and coexistence with other networks are maximized utilizing the entire frequency band Khanh Tuan Le <author>, <company>

Forward Error Correction (FEC) Whitening Packet Format <month year> doc.: IEEE 802.15-<doc#> May 2009 Forward Error Correction (FEC) Whitening Packet Format Khanh Tuan Le <author>, <company>

Simple Low Overhead FEC Proposal <month year> doc.: IEEE 802.15-<doc#> May 2009 Simple Low Overhead FEC Proposal As support for very long packets is mandatory, a simple low-overhead FEC should be defined for optional use to improve the packet error rate Proposal: (128,120,4) extended Hamming code SECDED: Corrects single bit, detect double bit errors Double bit error detection does not improve PER, but is useful for early receive termination when packet is corrupted Can also be viewed/implemented as (127,120,3) BCH, extended by an extra parity bit Generator polynomials: x7+x3+1 (BCH) and x+1 (extra parity) After 15 octets of PHY data, one octet containing parity check bits (PCB) is inserted Khanh Tuan Le <author>, <company>

doc.: IEEE 802.15-<doc#> <month year> doc.: IEEE 802.15-<doc#> May 2009 Packet Format Khanh Tuan Le <author>, <company>

doc.: IEEE 802.15-<doc#> <month year> doc.: IEEE 802.15-<doc#> May 2009 Whitening Proposal Whitening is done after FEC octet insertion Same LFSR polynomial is used for whitening all the time The whitening LFSR is initialized to an unique value based on the channel number (and data rate) used for the packet This would allow retransmissions to use different whitening for protection from packet data with poor whitening performance Khanh Tuan Le <author>, <company>

doc.: IEEE 802.15-<doc#> <month year> doc.: IEEE 802.15-<doc#> May 2009 Thank you! Khanh Tuan Le <author>, <company>