1. doc.: IEEE 802.15-12-0487-00-0008 Submission September 2012 Li, Hernandez, Dotlic, Miura, NICT Slide 1 Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs) Submission Title: [IR-UWB for TG 15.8 Peer Aware Communications] Date Submitted: [September 2012] Source: [Huan-Bang Li, Marco Hernandez, Igor Dotlic, Ryu Miura] Company [NICT] Address [3-4 Hikarino-oka, Yokosuka, Kanagawa, Japan] Voice:[+81 468475104], FAX: [:[+81 468475431], E-Mail:[lee@nict.go.jp] Re: [Respond to the CFP of PAC] Abstract:[Fitness of IR-UWB for TG15.8 Peer Aware Communications are described] Purpose:[This document is to provide a general review of IR-UWB for PAC] 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. doc.: IEEE 802.15-12-0487-00-0008 Submission September 2012 Li, Hernandez, Dotlic, Miura, NICT Slide 2 IR-UWB for TG 15.8 Peer Aware Communications Huan-Bang Li Marco Hernandez Igor Dotlic Ryu Miura National Institute of Information and Communications Technology (NICT), Japan

3. doc.: IEEE 802.15-12-0487-00-0008 Submission September 2012 Li, Hernandez, Dotlic, Miura, NICT Outlines Purpose of this document Characteristics of IR-UWB Ranging and positioning with IR-UWB Advantages of Using IR-UWB Conclusion remarks Slide 3

4. doc.: IEEE 802.15-12-0487-00-0008 Submission September 2012 Li, Hernandez, Dotlic, Miura, NICT Purpose of This Document Slide 4 This document is to show the fitness of IR-UWB to TG8 Peer aware communications (PAC), especially for the purpose to meet requirements of indoor positioning services with low data rate communication.

5. doc.: IEEE 802.15-12-0487-00-0008 Submission September 2012 Li, Hernandez, Dotlic, Miura, NICT Slide 5 Distributed and self organized (without infrastructure): MAC A high degree of autonomous and ad hoc: MAC Multiple relay and cooperative communication: MAC+PHY Congestion avoidance: MAC+PHY Extremely low power consumption: MAC+PHY To send SOS and report location in disasters: MAC+PHY IR-UWB is superior to other technology especially for low power consumption and high precision ranging What Can IR-UWB Promise to PAC

6. doc.: IEEE 802.15-12-0487-00-0008 Submission September 2012 Li, Hernandez, Dotlic, Miura, NICT Slide 6 UWB is the Best Candidate with High Precision for In Building Navigation GPS provides convenience of locationing services. However, GPS is not available in indoor environment. UWB can provide high precision ranging in indoor environment at an order of tens of centimeter, which can be used for route guiding in big exhibition hall, museum, etc.

7. doc.: IEEE 802.15-12-0487-00-0008 Submission September 2012 Li, Hernandez, Dotlic, Miura, NICT Slide 7 Definition of UWB

8. doc.: IEEE 802.15-12-0487-00-0008 Submission September 2012 Li, Hernandez, Dotlic, Miura, NICT Slide 8 PRF represents the number of pulses occurring in one second. Tc is in the order of nano seconds Short and Sparse Pulses in Time Domain

9. doc.: IEEE 802.15-12-0487-00-0008 Submission September 2012 Li, Hernandez, Dotlic, Miura, NICT Simple Structure of Transmitter

10. doc.: IEEE 802.15-12-0487-00-0008 Submission September 2012 Li, Hernandez, Dotlic, Miura, NICT Variety Structures of Receiver Rake Finger Np Rake Finger 2 Rake Finger 1 Summer TdTd Coherent RX || Best Performance Differentially- Coherent RX ( ) 2 Non-Coherent RX || Simplest Structure

11. doc.: IEEE 802.15-12-0487-00-0008 Submission September 2012 Li, Hernandez, Dotlic, Miura, NICT Slide 11 Shape of IR-UWB pulse Rectangular pulse (theoretically) Gaussian filter Raised cosine filter Chirp Trade-off among -complexity -orthogonality -Pulse interval (efficiency)

12. doc.: IEEE 802.15-12-0487-00-0008 Submission September 2012 Li, Hernandez, Dotlic, Miura, NICT Slide 12 General Ranging Methods Time of flight (TOA) - One way ranging - Two way ranging Signal strength ranging (SSR) Angle of arrival ranging (AOA) High precision but need for ‘good clock’ Poor precision

13. doc.: IEEE 802.15-12-0487-00-0008 Submission September 2012 Li, Hernandez, Dotlic, Miura, NICT Slide 13 Ranging With IR-UWB Time of Arrival (TOA)

14. doc.: IEEE 802.15-12-0487-00-0008 Submission September 2012 Li, Hernandez, Dotlic, Miura, NICT Slide 14 Anchor node Positioning Based on Ranging results Anchor node Anchor node

15. doc.: IEEE 802.15-12-0487-00-0008 Submission September 2012 Li, Hernandez, Dotlic, Miura, NICT Slide 15 Available Spectrum in Most Regulations

16. doc.: IEEE 802.15-12-0487-00-0008 Submission September 2012 Li, Hernandez, Dotlic, Miura, NICT Slide 16 The Advantages of Using IR-UWB IR-UWB is inherently low power consumption. That is favorable for devices to operate on small battery for long periods. Using TOA with extremely short pulse, IR-UWB can provide high precision ranging on order of tens of centimeter. IR-UWB is inherently exempt from multipath fading. That makes it suitable to indoor environment. IR-UWB has simple structure, which enables easy implementation and low cost for transceiver.

17. doc.: IEEE 802.15-12-0487-00-0008 Submission September 2012 Li, Hernandez, Dotlic, Miura, NICT Slide 17 Conclusion Remarks There are different PHY technologies that meet the requirement of 15.8 PAC. IR-UWB is superior to other technologies in the sense of providing high precision ranging as well as of low power consumption. Common frequency bands of UWB are available in most countries and regions.