Submission Title: Improving Packet Energy Efficiency Using ULP Mode May 2014 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 SShahriar Emami, 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. Shahriar Emami, Samsung
Improving Packet Energy Efficiency Using ULP Mode May 2014 Improving Packet Energy Efficiency Using ULP Mode Shahriar Emami, Samsung
May 2014 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. Shahriar Emami, Samsung
Asymmetric links proposed by ULP-GFSK May 2014 Asymmetric links proposed by ULP-GFSK Shahriar Emami, Samsung
Packet Energy Efficiency May 2014 Packet Energy Efficiency Shahriar Emami, Samsung
Samsung-IMEC Frame Structure May 2014 Samsung-IMEC Frame Structure Shahriar Emami, Samsung
May 2014 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 Shahriar Emami, Samsung
Energy Efficiency for Short Packets (VSF-TOOK) May 2014 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%. Shahriar Emami, Samsung
May 2014 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. . Shahriar Emami, Samsung
Energy Efficiency for Short Packets (ULP-GFSK) May 2014 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%. Shahriar Emami, Samsung
May 2014 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. Shahriar Emami, Samsung