Cisco 605-RF - 605 - 7 Mbps DSL Modem Bedienungsanleitung PDF herunterladen (Seite 6)

US

6,711,138

B1

1

DIGITAL

SUBSCRIBER

LINE/HOME

PHONELINE

NETWORK

ROUTER

BACKGROUND

1.

Field

of

the

Invention

The

present

invention

generally

relates

home

networking

technology

and

more

particularly

to

a

digital

subscriber

line/home

phoneline

network

router.

2.

Description

of

the

Related

Art

As

home

networking

continues

to

emerge,

there

is

a

growing

need

for

high-speed

connections

to

rapidly

supply

digital

data

within

homes.

Businesses

typically

achieve

high-speed

connections

by

deploying

local

area

networks

(LANs).

These

networks,

however,

are

not

commonly

employed

in

the

home

due

to

the

cost

and

complexity

of

installing

new

wiring

required

by

traditional

LANs.

The

Home

Phoneline

Networking

Alliance

(Home

PNA)

has

proposed

high-speed

home

networks

using

a

consumer’s

existing

phoneline.

Many

products

such

as

personal

com

puters

(PCs),

home

gateway

computers,

cable

modems,

DSL

(Digital

Subscriber Line)

modems,

digital

set-top

boxes,

digital

televisions,

digital

radios,

digital

cameras,

digital

telephones

and

other

network

appliances

stand

to

bene?t

from

high-speed

connections

to

a

home

network.

Home

phoneline

networking

technology

has

been

designed

to

ensure

compatibility

with

other

communication

services

within

the

home,

such

as

voice,

ISDN

(Integrated

Services

Digital

Network),

and

DSL

data

services.

Since

a

home

phoneline

network

is

an

Ethernet-compatible

LAN,

phone

line

networking

technology

has

leveraged

existing

Ethernet

software

and

hardware.

Translating,

addressing

and

routing

control

for

home

networks

has

traditionally

been

managed

by

home

network

controllers

and/or

home

gateway

computers.

In

contrast,

traditional

LAN

s

have

typically

been

managed

with

network

routers.

Such

network

routers

include

DSL-Ethernet

routers

and

ISDN-Ethernet

routers

targeted

to

businesses.

These

routers

have

been

dif?cult

to

install

and

use.

SUMMARY

OF

THE

INVENTION

Brie?y,

a

digital

subscriber

line

(DSL)/home

phoneline

network

router

provides

DSL

connectivity

and

home

net

working

support.

The

router

provides

a

single

phone

line

connection

(RJ-11

jack)

to

access

either

the

Internet

or

a

home

phoneline

network.

In

terms

of

hardware,

the

router

may

include

a

central

processing

unit,

a

DSL

modem,

and

a

home

phoneline

networking

device

(media

access

controller

and

home

phoneline

networking

physical

interface).

In

terms

of

software,

the router

may

include

a

DSL

driver,

a

local

area

network

(LAN)

driver,

a

media

access

controller

driver,

network

routing

stacks

and

a

real

time

operating

system.

BRIEF

DESCRIPTION

OF

THE

DRAWINGS

A

better

understanding

of

the

present

invention

can be

obtained

when

the

following

detailed

description

of

the

preferred

embodiment

is

considered

in

conjunction

with

the

following drawings,

in

which:

FIG.

1

is

a

block

diagram

of

an

exemplary

hardware

architecture

of

a

digital

subscriber

line/home

phoneline

network

router;

FIG.

2

is

a

diagram

of

an

exemplary

software

architecture

of

the

digital

subscriber

line/home

phoneline

network

router

of

FIG.

1;

10

15

20

25

30

35

40

50

55

60

65

2

FIG.

3

is

an

isometric

view

of

the

digital

subscriber

line/home

phoneline

network

router

of

FIGS.

1

and

2;

and

FIG.

4

is

a

block

diagram

of an

exemplary

home

network

environment

including

the

digital

subscriber

line/home

phoneline

network

router

of

FIGS.

1—3.

DETAILED

DESCRIPTION

OF

PREFERRED

EMBODIMENT

Turning

now

to

the

drawings,

FIG.

1

shows

an

exemplary

hardware

architecture

for

a

digital

subscriber

line

(DSL)/

home

phoneline

network

router

R.

The

router

or

bridge

R

includes

a

reduced

instruction

set

computer

(RISC)

central

processing

unit

(CPU)

112

to

handle

the

overall

manage

ment

of

the

router

R.

For

example,

the

CPU

112 can

handle

DSL

modem

control,

ATM

(Asynchronous

Transfer

Mode)

segmentation

and

reassembly

(SAR)

and

other

ADSL

pro

tocol

processing,

LAN

(Local

Area

Network)

protocol,

and

communications

with

a

universal

serial

bus

(USB)

control

ler.

As

an

alternative

to

the

CPU

112,

a

digital

signal

processor

can

be

used.

The

CPU

112

is

shown

coupled

to

a

Ethernet

controller

114 and

a

DSL

modem

120.

The

Ethernet

controller

114

includes

a

media

access

controller

(MAC)

118.

Both

the

Ethernet

controller

114

and

the

MAC

118

may

be

implemented

in

other

ways.

For

example,

the

MAC

118

can be

integrated

with

the

CPU

112.

In

a

disclosed

embodiment,

the

MAC

118

is

effectively

compliant

with

the

I.E.E.E.

802.3

standard

for

10

Mbps

Ethernet

networking.

The

MAC

118

is

coupled

to

a

1M8

physical

layer

device

122.

The

1M8

physical

layer

(PHY)

device

122,

a

home

phoneline

networking

physical

layer

device,

is

described

in

the

Home

Phoneline

Networking

Alliance

(HPNA)

1M8

PHY

Speci?cation,

Version

1.0.

Alternatively,

the

1M8

PHY

122

can

conform

to

the

upcoming

10

Mbps

Home

Phoneline

Networking

Alliance

2.0

Speci?cation.

The

1M8

PHY

122

generally

enables

home

networking

by

allowing

Ethernet

packets

to

be

transported

over

standard

home

telephone

wiring

using

standard

Ethernet

CSMA/CD

(Carrier

Sense

Multiple Access/Collision

Detect)

Media

Access

Control

(MAC)

procedures

as

speci?ed

in

the

I.E.E.E.

802.3

stan

dard.

The

1M8

PHY

122

generally serves

as a

home

phoneline

networking

physical

interface.

The

1M8

PHY

122

and

the

MAC

118

together

generally

serve

as a

home

phoneline

networking

device.

An

optional

USB

interface

may

be

designed

into

the

router

R

as

well

for

host

connec

tivity.

The

DSL

modem

120

and

the

1M8

PHY

122

may

both be

coupled

to

a

plug-in

module

124

containing

a

DSL

analog

front

end

126,

a

1M8

AFE

128

and

an

RJ-11

jack

130.

More

particularly,

the

DSL

modem

120

is

coupled

to

the

DSLAFE

126,

and

the

1M8

PHY

122

is

coupled

to

the

1M8

AFE

128.

Communication

between

the

1M8

PHY

122

and

the

MAC

118

is

generally

understood

in

the

art.

As

an

alternative

to

a

plug-in

con?guration,

the

DSL

AFE

126,

1M8

AF

E

128

and

RJ-11

jack

130

may

be

directly

integrated

into

the

router

R.

As

an

alternative

to

the

RJ-11

jack,

other

types

of

customer

premise

equipment/telephone

company

interfaces

might

be

used.

By

integrating

the

1M8

PHY

122,

the

1M8

AFE

128,

the

MAC

118,

the

DSL

modem

120,

and

the

DSL AFE

126,

the

router

R

provides

the

appropriate

hardware

to

enable

home

networking

and

DSL

connectivity.

DSL

should

be under

stood

to

refer

to

any

of

the

technologies

in

the

DSL

family,

such

as

symmetric

DSL

(SDSL),

Asymmetric

DSL

(ADSL),

High-Speed

DSL

(HDSL),

and

G.

Lite.

Those

skilled

will

appreciate

that

there

can

be

variations

in

con?gurations

for

the

router

R

depending

on

the

particular

DSL

technology

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