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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: Improving Packet Energy Efficiency Using ULP Mode Date Submitted: May 2014 Source: SS S Shahriar Emami , Samsung 75 W Plumeria Drive, San Jose, CA, USA

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

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  1. Shahriar Emami, Samsung Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs) Submission Title:Improving Packet Energy Efficiency Using ULP Mode Date Submitted: May 2014 • Source:SS SShahriarEmami, Samsung 75 W Plumeria Drive, San Jose, CA, USA Abstract: Technique for Improving Packet Energy Efficiency Purpose: Overview of a proposed approach 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. ShahriarEmami, Samsung Improving Packet Energy Efficiency Using ULP Mode

  3. ShahriarEmami, Samsung Proposal For both PHY options, the packet energy efficiency for short packets is quite poor. A simple procedure to improve the energy efficiency of both options is proposed. It requires definition of a ULP signaling bit in the PHY header. In this mode previous parameters are used. Unused bandwidth is used to send more data. • For both PHY options, the packet energy efficiency for short packets is quite poor. • A simple procedure to improve the energy efficiency of both options is proposed. • It requires definition of a ULP bit in the PHY header. • In ULP mode previous parameters are used. Unused bandwidth is used to send more data.

  4. ShahriarEmami, Samsung Asymmetric links proposed by ULP-GFSK

  5. ShahriarEmami, Samsung Packet Energy Efficiency

  6. ShahriarEmami, Samsung Samsung-IMEC Frame Structure

  7. ShahriarEmami, Samsung PHY Header ULP • To improve efficiency, PHY header can be used for data transmission as well. • Use one bit of PHY header as ULP signaling indicator (either PHR7 or PHR11 can be used). • In ULP state (ULP = 1), previous frame header parameters will be used. With the exception of PH7 (or PHR11) all other bits are used to carry data • In non- ULP state (ULP = 0), a new frame header will be used

  8. ShahriarEmami, Samsung Energy Efficiency for Short Packets(VSF-TOOK) • The energy efficiency for short packets • (5 bytes long) is quite poor (10.6%). • Using this approach packet efficiency increases by 40%. • Equivalent to increasing battery life by 40%.

  9. ShahriarEmami, Samsung ULP-GFSK PHY Header ULP • The DW field is ignored in the ULP-GFSK proposal. One can use it to signal the ULP mode. • When (ULP = 1), previous frame header will be used. Frame length field carries data. • In non-ULP state (ULP = 0), a new frame header will be used. • .

  10. ShahriarEmami, Samsung Energy Efficiency for Short Packets(ULP-GFSK) • The energy efficiency for short packets • (5 bytes long) is quite poor (45%) • Packet efficiency can be increased using this method by about 18%. • Equivalent to increasing battery life by 18%.

  11. ShahriarEmami, Samsung Conclusion • A simple technique to improve the packet energy efficiency was presented. • The technique is suitable for asymmetric links. • Applicable to both VSF-TOOK and ULP-GFSK. • Utilizes degrees of freedom in both options.

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