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Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs)

Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs) Submission Title: [PHY p re-proposal for PAC common discovery mode] Date Submitted: [ May 2013 ]

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Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs)

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  1. Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs) Submission Title: [PHY pre-proposal for PAC common discovery mode] Date Submitted: [May 2013] Source:[Tae-Joon Park*, Jae-Min Ahn**, Keun Hyung Lee*, Wun-Cheol Jeong*, Chang-Sub Shin*, Hoyong Kang*] Company: [*ETRI, **Chungnam National Univ.] E-Mail:[*tjpark@etri.re.kr, **jmahn@cnu.ac.kr] Re: [] Abstract: 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.

  2. PHY Pre-proposal for PAC common discovery mode Tae-Joon Park*, Jae-Min Ahn**, Keun Hyung Lee*, Wun-Cheol Jeong*, Chang-Sub Shin*, Hoyong Kang* *ETRI, **Chungnam National Univ

  3. Common discovery mode for PAC • Common discovery mode for • PD finding • Exchange PD capability • Peer-to-peer connection setup • To support interoperability between PAC devices regardless of frequency bands • Discovery mode should be unique in PAC • Optimized for peer-discovery

  4. Requirements of Common discovery mode • Low HW implementation complexity • RF chain • ADC/DAC • Baseband • Simple and robust PHY • IPR free to reduce the debate for mandatory mode  requires well known and simple PHY • Robustness is more important than the transmission rate • Single mode (modulation type, rate, etc.)

  5. Messages over Common discovery mode • Beacon • Broadcast PD capabilities • Connection request • IDs • With the capabilities of requesting PD • Connection acknowledge • IDs • With the connection mode

  6. Possible framing structure • Preamble • Header • Message type • Length of PSDU • Header check sequence • PSDU Preamble Header PSDU

  7. Possible modulation type • Binary FSK • On-off Keying • Differential BPSK • Simple receiver structure with non-coherent demodulation • Moderate performance

  8. Pros and cons for modulation types

  9. Encoding • Error detection and retransmission only • Reducing the decoder complexity • Simple CRC would be OK • Ex: 8bit CRC

  10. Preamble • Purpose of preamble • Signal detection • AGC • synchronization • AFC : frequency synchronization • Symbol synchronization • Frame synchronization • Etc. • Preamble sequence candidates • CAZAC sequence • M-sequence • Barker code • Gold code • Etc.

  11. Example of transmitter structure Add CRC Scramble MUX PSDU information To transceiver Modulation And/or Spreading Add CRC Scramble Header information Preamble

  12. PHY parameters • Band candidates • Sub-1GHz • ISM : 2.4GHz, 5GHz • 6-10GHz • Other licensed band • Data rate and Bandwidth • 50Kbps, 200KHz is enough for implementing common communication mode

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