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Project: IEEE P802.15 Working Group for Wireless Personal Area Networks(WPANs) Submission Title: Preliminary Proposal for TG4m Date Submitted: May 15, 2012 Source: Cheol-ho Shin , Mi-Kyung Oh and Sangsung Choi (ETRI), Soo-Young Chang (SYCA) Contact: chshin@etri.re.kr

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  1. Project: IEEE P802.15 Working Group for Wireless Personal Area Networks(WPANs) Submission Title: Preliminary Proposal for TG4m Date Submitted: May 15, 2012 Source: Cheol-ho Shin , Mi-Kyung Oh and Sangsung Choi (ETRI), Soo-Young Chang (SYCA) Contact: chshin@etri.re.kr Voice:+82 42 860 6831, E-Mail: chshin@etri.re.kr Re: Call for proposals Abstract: This contribution presents a preliminary proposal for the TG4m Purpose: Preliminary proposal to 802.15m 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. Slide 1

  2. FSK PHY for TG4m (1) • FSK based NB PHY • Cover the lower data rate, e.g., 50Kbps ~ 200Kbps • Interoperability • Consider 900MHz SUN • Propose to use basically TG4g FSK PHY • Propose to include some reliability enhancing features (ETRI)

  3. FSK PHY for TG4m (2) • Modulation & channel parameters • Mode #1 & #3: same as TG4g • Mode #2: 150Kbps (TG4g)  100Kbps (ETRI)

  4. FSK PHY for TG4m (3) • Reliability enhancing features: PHY header • PHR in TG4g FSK PHY • Propose to use one of reserved bits as a parity bit • Simply detect PHR error to stop demodulation process (ETRI)

  5. FSK PHY for TG4m (4) • Reliability enhancing features: FEC • TG4g FEC • Convolutional code with K=4 • It is hard to achieve the theoretical FEC gain in FSK system • TG4m FEC • Propose to use convolutional code with K=7 for better performance • Reliability enhancing features: Spreading • Propose to use spreading scheme in LECIM FSK PHY (15-12-0089-05) (ETRI)

  6. TG4g MR-OFDM Modes (ETRI)

  7. Add default Modes to TG4g MR-OFDM Modes (ETRI)

  8. Optional Modes for TG4m OFDM Modes • Using 4x over-clock of TG4g MR-OFDM Option 1 (ETRI)

  9. Summary • FSK PHY • Adopt basically TG4g MR-FSK PHY • Include reliability enhancing features • Parity in PHR, FEC with K=7, Spreading • OFDM PHY • Add default modes to TG4g MR-OFDM Modes to increase the data rates • Add optional modes using 4x over-clock of TG4g MR-OFDM option 1 to satisfy the data rate of about 10Mbps (ETRI)

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