Cypress CY62167EV18 Instrukcja Użytkownika Pobierz pdf (Strona 13)

US

2012/0147184

A1

[0033]

Further,

a

battery

powered

Wireless

camera

opera

tion

can

be

achieved

using

Well

established

components.

Bat

tery

poWered

Wireless

network

camera

systems

can

be

achieved

Without

additional

external

poWer

source

or

cabling.

These

systems

can

have

standard

Web

server

capability

for

client

access

to

the

captured

data.

Because

no

poWer

cabling

is

needed,

these

battery

poWered

Wireless

netWork

camera

systems

can

be

deployed

in

locations

Where

previously

di?i

cult

to

service.

Camera

operation

for

extended

periods

of time

can

be

obtained

using

small

battery

packs.

[0034]

By

using

modi?ed

media

access

techniques,

unreli

able

or

inconsistent

connectivity

associated

With

the

standard

IEEE

802.11

Wireless

links

can

be

avoided.

Additionally,

the

erratic

set-up

and/or

operation

of

a

Wireless

link

due

to

inter

ference

or

other

environmental

factors

can

be

minimized.

The

draWbacks

of

the

IEEE

802.11

MAC

standards

in

poor

con

nection

conditions

can

be

overcome

by

observing

interfer

ence

and

also

using

techniques

to

reserve

and

hold

a

connec

tion

for

data

transmission.

For

example,

by

implementing

a

second

loW-bandWidth

radio/transceiver

in

the

Wireless

cam

era,

the

modi?ed

media

access

techniques

can

be

triggered

and

controlled

through

the

second

radio.

The

loW-bandWidth

radio

can

establish

a

link

in

conditions

Where

the

high-band

Width

radio/transceiver

cannot.

[0035]

By

incorporating

more

functionality

in

the

base

sta

tion

of

the

Wireless

netWork

camera

system,

the

base

station

can

detect

and

correct

link

problems

by

requesting

retrans

mission

of

the

captured

data.

Such

request

can

be

sent

via the

loW-bandWidth

radio

Which

can

be

more

reliable

and

use

loWer

poWer

than

the

high-bandWidth

radio.

This

retransmis

sion

can

be

hidden

and

transparent

to

the

client

surveillance

application

through

the

virtual

Web

server

or

relay

server

in

the

base

station.

In

addition,

image and

video

analytical

func

tions

such

as

object

recognition,

people

counting,

and

license

recognition

can

be

implemented

in

the

base

station

rather

than

the

camera.

These

analytical

functions

can

be

implemented

in

a

hidden

Way

so

that

it

logically

appears

to

the

client

that

these

functions

are

occurring

in

the

camera.

Furthermore,

in

appli

cations

Where

privacy

of

the

image

or

audio

data

needs

to

be

protected,

the

data

transmitted

Wirelessly

can

be

encrypted.

[0036]

The

speci?c

aspects

may

be

implemented

using

a

system,

method,

or a

computer

program,

or

any

combination

of

systems,

methods,

and

computer

programs.

The

details

of

one

or

more

embodiments

are

set

forth

in

the

accompanying

draWings

and

the

description

beloW.

Other

features,

aspects,

and

advantages

Will

be

ascertained

from

the

description,

the

draWings,

and

the

claims.

BRIEF

DESCRIPTION

OF

THE

DRAWINGS

[0037]

These

and

other

aspects

Will

noW

be

described

in

detail

With

reference

to

the

folloWing

draWings.

[0038]

FIG.

1

is

a

block

diagram

of

a

battery

poWered

Wireless

camera.

[0039]

FIG.

2

shoWs

a

battery

poWered

Wireless

netWork

camera

system

for

remote

surveillance

applications.

[0040]

FIG.

3

shoWs

another

battery

poWered

Wireless

net

Work

camera

system

for

remote

surveillance

applications.

[0041]

FIG.

4

is

a

diagram

shoWing

a

burst

data

transmis

sion.

[0042]

FIG.

5A

shoWs

a

How

chart

of

a

MAC

algorithm

that

can

be

used

by

the

Wireless

camera.

[0043]

FIG.

5B

is

a

How

chart

shoWing

a

process

that

can

be

used

to

implement

the

CTS-to-Self

algorithm.

Jun.

14,

2012

[0044]

FIG.

6

shoWs

a

block

diagram

of

a

battery

current

limiting

circuit

that

can

be

used

to

connect

to

the

camera

poWer

input.

[0045]

FIG.

7

is

a

block

diagram

of

computing

devices

and

systems.

[0046]

Like

reference

symbols

in

the

various

draWings

indicate

like

elements.

DETAILED

DESCRIPTION

OF

THE

INVENTION

[0047]

The

systems,

apparatus

and

techniques

described

herein

relate

to

providing

Wireless

netWork

camera

systems.

For

example,

the

Wireless

netWork

camera

systems

described

herein

can

operate

for

an

extended

period,

e.g.,

months

or

even

years

Without

maintenance

in

certain

applications.

By

looking

at

the

energy

requirements

of

the

system

over

time,

the

systems

and

techniques

described

herein

use

a

time-sliced

energy

cycling

technology

to

distribute

processing

needed

over

time

and

location.

Furthermore,

the

systems

and

tech

niques

described

herein

are

combined

With

modern,

available

Wireless

technologies

(such

as

the

modulation

schemes

deployed

in

systems

like

WiFi

802.11)

and

off-the-shelf

advanced

semiconductor

components.

As

a

result,

an

overall

reduction

in

the

camera

poWer

of

tWo

or

more

orders

of

magnitude

can

be

achieved.

For

example,

the

Wireless

camera

described

herein

can

potentially

operate

on

less

than

10

mW

of

poWer

on

a sustainedbasis,

and

the

Wireless

camera

can run

over

12

months

using

10

AA

Lithium

batteries.

[0048]

Connection

from

the

base

station to

other

IP

security

video

cameras

and

netWork

can be

done

via

Wired

or

Wireless

links.

Each

Wireless

camera

connected

to

the

base

station

can

be

assigned

an

IP

address

from

the

Ethernet

router

through

the

regular

DHCP

or

other

standard

Ethernet

methods.

Further,

each

Wireless

camera

in

the

netWork

behaves

like

a

regular

IP

camera

to

any

existing

client

or

application

on

the

LAN.

In

this

Way,

each

Wireless

camera

can

be

addressable

through

industry

standard

APIs

so

that

each

video

stream

and

each

Wireless

camera

can be

vieWed,

recorded,

and

manipulated

individually

Without

any

modi?cations

to

existing

applica

tions

and

hardWare.

[0049]

The

Wireless

netWork

camera

systems

described

herein

can

be

used

in

numerous

applications,

such

as

alarm

veri?cation

and

surveillance applications

for

constructions

sites,

mobile

transportation,

and

border

patrol.

[0050]

Construction

Sites

[0051]

Construction

theft

is

Widespread

and

nothing

neW,

but

the

amount

of

theft

is

increasing.

Construction

thefts,

Which

are

rarely

solved,

can

lead

to

construction

delay,

higher

costs

and

insurance

rates,

and

higher

home

prices.

The

National

Association

of

Home

Builders

estimates

that

the

construction

theft

problem

costs

the

US

building

industry

$4

billion

annually

and

increases the

cost

of

the

average

home

by

1.5

percent.

Some

builders

try

to

protect

themselves

by

using

bind

tools

and

materials

into

heavy

heaps

or

block

driveWays.

Most

install

temporary

locks

on

WindoWs

and

doors

and

Wait

until

the

last

minute

to

install

appliances.

[0052]

Installing

traditional

video

security

cameras

can

be

dif?cult

because

poWer

is

unlikely

to

be

available

at

the

loca

tion

best

served

by

the

video

camera.

Most

builders

are

unWilling

to

invest

the

dollars

for

a

temporary

installation.

In

addition,

cabling

for

a

netWork

camera

system can

be

imprac

tical

at

the

construction

site.

The

Wireless

netWork

camera

systems

described

herein

can

offer

a

solution

to

this

problem.

Wireless

cameras

can be

quickly

added

and

moved

during

the

construction phase,

and

theft

activity

can be

identi?ed

in

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