[PDF] - Mobile Interaction C.W. Johnson, Univ ersit y of Glasgo w, PDF Document

SLIDE 1 Mobile Interaction C.W. Johnson, Univ ersit y

f

Glasgo w, Glasgo w, G12 8QQ. Scotland. johnson@dcs.gla.ac.uk, h ttp://www.dcs.gla .a c.uk/ johnso n Octob er 2001 CS-1Q: HCI (Lecture 8) c

C.W.

Johnson, 2001 1

SLIDE 2 Mobile Interaction

Input

and

utput

issues.

Pro

cesso r, battery and memo ry issues.

W

AP , G3 and Blueto

th.
Context

Aw a reness and GCS.

Realit

y Checks... CS-1Q: HCI (Lecture 8) c

C.W.

Johnson, 2001

SLIDE 3 Input and Output

Displa

y limitations:

icking

through decks

f

ca rds;

tiling,

click to maximise;

also

3D audio, tactile

utput.

Ac kno wledgemen t: T. Berlitz, www.p

c

k etno w.com

Input

limitations:

cha

racter recognition;

automatic

w

rd

completion;

sp

eech recognition;

gloves

and cameras. CS-1Q: HCI (Lecture 8) c

C.W.

Johnson, 2001

SLIDE 4 Pro cesso r, Memo ry and Battery Limitations

HP

Jo rnada 710: { 206MHz Strong ARM p ro cesso r;

32MB

RAM, 32 MB Flash Memo ry ,

P
ck

et Microsoft Windo ws Oce. Ac kno wledgemen t: www.hp.com

12-14

hours battery life. CS-1Q: HCI (Lecture 8) c

C.W.

Johnson, 2001

SLIDE 5 Pro cesso r, Memo ry and Battery Limitations

Compaq

iP aq H3650:

StrongArm

200 mhz

12

bit (4,096) colo r

32

MB RAM. Ac kno wledgemen t: T. Berlitz, www.p

c

k etno w.com

What

can y

u

do with them? CS-1Q: HCI (Lecture 8) c

C.W.

Johnson, 2001

SLIDE 6 Wireless Application Proto col

Simila

rities to desktop w eb:

phone

has a b ro wser lik e

n

a PC;

no

sp ecial server is needed. <?xml version="1.0"?> <!DOCTYPE wml PUBLIC "-//WAPFORUM//DTD WML 1.1//EN" "http://www.wapforum.org/DTD/wml.xml"> <wml> <card id="Card1" title="Card 1"> Happy Hippy's WML Demo <big>This is card 1</big> <do type="accept" label="Card 2"> <go href=">" </do> </card> <card id="Card2" title="Card 2"> Happy Hippy's WML Demo <big>This is card 2</big> <do type="accept" label="Card 1"> <go href=">" </do> </card> </wml>

But:
HTML

is no w Wireless Ma rkup Language;

rules

a re mo re rigid to supp

rt

small displa y . CS-1Q: HCI (Lecture 8) c

C.W.

Johnson, 2001

SLIDE 7 Third Generation (3G) \P eter Bo dor, public relations manager at Ericsson: "W AP's disapp

in

tmen t w as caused b y industry failure to manage ex- p ectations, and the main problem w as its slo wness. This w

n't

b e a problem with 3G. The 3G In ternet exp erience will b e as go

d

as surng from home, with the added b enet

f

lo cation-based services making the exp erience more p ersonal." http://news.zdnet.co.uk/

What

is 3G and why pa y so much fo r licenses? CS-1Q: HCI (Lecture 8) c

C.W.

Johnson, 2001

SLIDE 8 Third Generation (3G)

Simplest

3G phones fo r talking and

will

sto re all their info rmation

n

the net w

rk.
Second

t yp e video-streaming, news and w eb.

Third

t yp e will b e `info rmation centres',

mo

re lik e conventional top-end PD As.

They

will b e equipp ed with Blueto

th.

CS-1Q: HCI (Lecture 8) c

C.W.

Johnson, 2001

SLIDE 9 Third Generation (3G)

Mo

re technical info rmation:

1st

generation p rovide analogue voice telephony

2nd

(current) generation add some data (fax and email)

3rd

will p rovide data rates

f

up to 2 Mb p er second.

UMTS

(Universal Mobile T elecommunications System)

3G

standa rd b eing develop ed across glob e;

International

T elecommunications Union (ITU);

family
f

standa rds to switch b et w een, not

ne
Exp

ectation that 3G will b e here in 2002;

based
n

EU's UMTS Decision fo r licensing schedule. CS-1Q: HCI (Lecture 8) c

C.W.

Johnson, 2001

SLIDE 10 Blueto

th
Lo

cal Area Net w

rk

radio systems:

IEC

802.11 (Apple AirP

rt,

Lucent Orino co;

can

b e up to 10Mb/s dep ending

n

ca rd;

cover

50-200 meter cells dep ending

n

w alls etc.

But
need

fo r sho rter connections:

connect

laptop to y

ur

phone to y

ur

TV to y

ur

fridge.

Infra-red

(IrD A) communications:

p

erate

ver

a few meters, line

f

sight;

dicult

to maintain and slo w data rates.

Blueto
th:
w-cost,

sho rt range radio links;

1Mb/s

with an actual data rate

f

728 Kb/s.

BUT
IEC802.11

no w rivals Blueto

th!

CS-1Q: HCI (Lecture 8) c

C.W.

Johnson, 2001

SLIDE 11 Context Aw a reness

Why

a re cell sizes imp

rtant?
inside

GPS receivers will not w

rk;
so

nd

ut

what cell a user is in;

follo

w-me applications such as phone switching. Ac kno wledgemen t: Oliv etti and iButton.

Alter

info rmation to users lo cation. CS-1Q: HCI (Lecture 8) c

C.W.

Johnson, 2001

SLIDE 12 Glasgo w Context Server

Key

p rinciples:

passive

lo cation detection;

`o

the shelf ' ha rdw a re;

uses

infra-red and radio LAN (IEC 802.11).

Currently

w

rking
n

human P A C-MAN. CS-1Q: HCI (Lecture 8) c

C.W.

Johnson, 2001

SLIDE 13 Realit y Check 1

What

will all these devices b e used fo r?

Nokia

9000 Communicato r:

develop

ed, ma rk eted and sold;

all

b efo re any

ne

knew ho w it w

uld

b e used.

Ma

rk et

pp
rtunit

y not user-centred design:

but

Nokia then do close

bservational

studies;

info

rm subsequent development

f

p ro duct;

after

initial ma rk et is established. CS-1Q: HCI (Lecture 8) c

C.W.

Johnson, 2001

SLIDE 14 Realit y Check 2

Mobile

devices p

se

huge challenges.

Physical

constraints demand new widgets.

User

tasks a re dicult to p redict.

Users

move and so a re dicult to

bserve.
Ma

rk eting hyp e

ften

claims ea rly adopters;

dicult

to anticipate longer term usabilit y issues. CS-1Q: HCI (Lecture 8) c

C.W.

Johnson, 2001

SLIDE 15 Summa ry

Input

and

utput

issues.

Pro

cesso r, battery and memo ry issues.

W

AP , G3 and Blueto

th.
Context

Aw a reness and GCS.

Realit

y Checks... CS-1Q: HCI (Lecture 5) c

C.W.

Johnson, 2001

SLIDE 16 F urther Reading

Shneiderman

isn't very go

d
n

this a rea. http://www.cs.strath.ac.uk/ mdd/mobilehci/procs/

Read

a couple

f

a rticles instead? CS-1Q: HCI (Lecture 8) c

C.W.

Johnson, 2001