doc.: IEEE 802.15-12-0487-00-0008

Submission

September 2012

Li, Hernandez, Dotlic, Miura, NICTSlide 1

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: [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.

doc.: IEEE 802.15-12-0487-00-0008

Submission

September 2012

Li, Hernandez, Dotlic, Miura, NICTSlide 2

IR-UWB for TG 15.8 Peer Aware Communications

Huan-Bang LiMarco Hernandez

Igor DotlicRyu Miura

National Institute of Information and Communications Technology (NICT), Japan

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

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.

doc.: IEEE 802.15-12-0487-00-0008

Submission

September 2012

Li, Hernandez, Dotlic, Miura, NICTSlide 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

doc.: IEEE 802.15-12-0487-00-0008

Submission

September 2012

Li, Hernandez, Dotlic, Miura, NICTSlide 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.

doc.: IEEE 802.15-12-0487-00-0008

Submission

September 2012

Li, Hernandez, Dotlic, Miura, NICTSlide 7

Definition of UWB

Frequency

GSM:30KHz

+35 dBm/MHz

PowerW-CDMA:

5MHz+15 dBm/MHz

UWB: 500MHz ～ several GHz, - 41.3dBm/MHz

UWB must have a bandwidth ofFBW ≥ 20% or larger than 500MHz

fLfH

Definition of fractional bandwidth

FBW = 2(fH-fL)/(fH+fL)

doc.: IEEE 802.15-12-0487-00-0008

Submission

September 2012

Li, Hernandez, Dotlic, Miura, NICTSlide 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

TC

PRI

PRFBW

PP AvePeak PRFBW

PP AvePeak

))((log103.41)( 10 MHzBWdBmPAve ))((log103.41)( 10 MHzBWdBmPAve

doc.: IEEE 802.15-12-0487-00-0008

Submission

September 2012

Li, Hernandez, Dotlic, Miura, NICT

Simple Structure of Transmitter

Pulsegenerator

BPF

Controller

Transmitter

doc.: IEEE 802.15-12-0487-00-0008

Submission

September 2012

Li, Hernandez, Dotlic, Miura, NICT

Variety Structures of Receiver

RakeFinger Np

RakeFinger 2

RakeFinger 1

Summer

Td

Coherent RX||

Best Performance

Differentially-Coherent RX

( )2 Non-Coherent RX

||Simplest Structure

0

0

doc.: IEEE 802.15-12-0487-00-0008

Submission

September 2012

Li, Hernandez, Dotlic, Miura, NICTSlide 11

Shape of IR-UWB pulse

• Rectangular pulse (theoretically)

• Gaussian filter

• Raised cosine filter

• Chirp

•

Trade-off among -complexity -orthogonality -Pulse interval (efficiency)

doc.: IEEE 802.15-12-0487-00-0008

Submission

September 2012

Li, Hernandez, Dotlic, Miura, NICTSlide 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

doc.: IEEE 802.15-12-0487-00-0008

Submission

September 2012

Li, Hernandez, Dotlic, Miura, NICTSlide 13

poATBR ttTT 11

poBTAR ttTT 22

Ranging With IR-UWB

Time of Arrival (TOA)

pt

Device A Device B

ptUnknown propagation delay

Unknown clock offset 0tMessage 1

Message 2

doc.: IEEE 802.15-12-0487-00-0008

Submission

September 2012

Li, Hernandez, Dotlic, Miura, NICTSlide 14

Anchornode

Positioning Based on Ranging results

Anchornode

Anchornode

doc.: IEEE 802.15-12-0487-00-0008

Submission

September 2012

Li, Hernandez, Dotlic, Miura, NICTSlide 15

Available Spectrum in Most Regulations

<author>, <company>

Low band High band

3.1G 3.4 G 4.2G 4.8G 6.0G 7.25G 8.5G 9G 10.25G 10.6G

2010

w/DAA 2013

2010

2010

Japan

Korea

China

EU

w/DAA

7.2 GHz 10.2 GHz

w/DAA

USA

w/DAA

doc.: IEEE 802.15-12-0487-00-0008

Submission

September 2012

Li, Hernandez, Dotlic, Miura, NICTSlide 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.

doc.: IEEE 802.15-12-0487-00-0008

Submission

September 2012

Li, Hernandez, Dotlic, Miura, NICTSlide 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.