Close Proximity Electric Induction Data Transfer Overview September 2010 Ecma/TC50/2010/037.

Close Proximity Electric Induction Data Transfer

Overview

September 2010

Ecma/TC50/2010/037

What is Electric Induction Coupling?

Electric Induction Coupling is a new wireless technology that combines the speed of UWB (Ultra-Wide Band) with the ease of NFC (Near Field Communications). Operating up to a distance of a few centimeters, this technology delivers a close proximity connection at a transfer speed of 560 Mbps by means of a simple “touch” between two devices. From a user standpoint, this model can be thought of as an intuitive, touch-activated, high-speed data interface providing instant connectivity between a wide variety of consumer (and non-consumer) electronic products.

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Key Concepts

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Proximity Interface - Intuitive Model Simply bring two devices close together and the connection is

established and data transfer begins!

High Speed 560 Mbps (max) for the physical layer 375 Mbps (max) effective throughput

No Setup Required Instant, ad-hoc touch triggers the connection

Safe and Secure Limited spatial reach ensures inherent privacy and security

Interference Free Induction coupler and low power minimize interference effects Excellent co-existence with other systems

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Example Use Cases

The Benefits

This wireless standard enables a high-speed, low-power interface for the transfer of data between two active devices in very close proximity.

There are no standards in existence today that can handle bi-directional data transfer at speeds above 500 Mbps optimized for close proximity, one-to-one communication.

This standard ensures basic connectivity and interoperability for data transfer regardless of product, application, usage model or content.

This standard can be directly applied for a variety of different industry segments, including consumer electronics, industrial, enterprise, public areas and special environments.

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Basic Technology

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Center Frequency 4.48 GHz

Bandwidth 560 MHz

Transmission Power < -70 dBm/MHz

Transmission Rate 560 Mbps (physical ）

Modulation Direct Sequence Spread Spectrum (DSSS)

Communication Distance Up to a few centimeters

Data Transfer Direction Bi-directional, symmetric

Antenna Element Electric Induction Coupler

Connection Topology 1-to-1, Point-to-Point

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Unique Wireless Positioning

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BluetoothBluetooth 2.1 2.1 　　　　

Low-bandwidth Personal Area Networking

1

10

100

500

Distance Coverage (m) 1 100 10

Wi-FiWi-Fi 802.11a/b/g/n802.11a/b/g/n

　　　　 Local Area Networking

UWBUWB 　　

　 Personal Area Networking

Eff

ecti

ve T

hro

ug

hp

ut

(M

ps)

NFC 　　

Authentication Transaction

ProximityProximity LongitudinalLongitudinal

ElectricElectric InductionInduction

High-Speed Data Transfer

Interface

- High-Speed Data Transfer - Robust Connection - Secure Communications - Zero Configuration / Setup - Interference Free - Regulatory Compliance

ECMA-340…

ECMA-368…

Memory Spot

Enhanced RFID

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-70 dBm/MHz:

-41.3 dBm/MHz:

Frequency Usage

Region of Operation 4.2 to 4.76 GHz

-70 dBm/MHz or below

The frequency used is from 4.2 to 4.76 GHz, corresponding to a section of the UWB band available in most regions of the world. The power level is kept at or below -70 dBm/MHz, which means that a compliant device will be DAA exempt.

Electric Induction Principle

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+ + + + +

_ _ _ _ _

L

Q

Q

Transverse Component

Longitudinal Component

Quasi-Static

Induction

Radiation

cos1

2 23

R

jk

R

peE

jkR

R

sin

1

4

2

23

R

k

R

jk

R

peE

jkR

sin

1

4 2

R

jk

R

pejH

jkR

Electric Induction Coupling Mode

Inductive Charge

Inverse Mirror Charge

A specially designed antenna called a coupler is used to maximize the longitudinal electricinduction component and minimize the radiation component of the wireless energy. This results in highly efficient coupling in the near field while providing sharp attenuation in the far field.

Generic Coupler Structure

x y

z

RE

E共振部

結合電極

グランド Ground

Induction Plate

Resonant Stub

Electric Induction Coupling Animation

No Target Target within range

λ/

2 @

4.4

8GH

z

1cm

Coupler

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The coupler delivers a "bubble" of energy which collapses back in its entirety with each cycle, unless another coupler comes into its vicinity in which case part of the energy is absorbed by this target coupler. When there are no target couplers nearby, no energy is dissipated unlike traditional antennas radiating TEM waves.

Longitudinal Electric Induction Coupler

Conventional Radiating Dipole Antenna

Electric Field Propagation

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Linear Polarization

Polarization Free

Because the longitudinal electric induction fields originate from a single plate, they are not polarized. The couplers can approach each other at any angle without sacrificing coupling performance, in contrast toradiating antennas which generally have clear polarizing characteristics.

The near-field sensitivity is also higher using couplers compared to traditional dipole antennas.

Usage Scenarios

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Consumer Electronics

Outdoor Use

Enterprise

Industrial

Location-Based

Home & Personal AV products

Digital Signage

Kiosk

Public Areas

Outdoors Under water

Automotive

Rugged Environments

Industrial

Shopping Mall

In addition to consumer electronics, electric induction data transfer is also suited for industrial and other usage scenarios that require robust, high-speed, non-contact connections.

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Worlds are About to TouchWorlds are About to Touch

Creating a New TouchTouch Paradigm

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