Eicon Networks Eicon 1550 Uživatelský manuál stáhnout pdf (Strana 7)

US

2006/0120402

A1

METHOD

FOR

RUNNING

AN

X25-BASED

APPLICATION

ON

A

SECOND

PROTOCOL-BASED

NETWORK

CROSS-REFERENCE

TO

RELATED

APPLICATIONS

[0001]

This

is

the

?rst

application

?led

for

the

present

invention.

TECHNICAL

FIELD

[0002]

The

present

invention

relates

to

the

?eld

of

net

working.

More

precisely,

this

invention

pertains

to

the

?eld

of

network

interface

cards.

BACKGROUND

OF

THE

INVENTION

[0003]

Despite

its

age,

the

legacy

X25

communication

protocol

is

still

used

with

a

large

amount

of

applications

around

the

world.

For

instance,

various

banking

and

tele

communication

applications

still

use

X25-based

applica

tions.

[0004]

Now

referring

to

FIG.

1,

there

is

shown

a

prior

art

embodiment

where

an

X25

communication

protocol

is

used.

In

this

embodiment,

a

?rst

host

8

communicates

with

a

second

host

16

via

an

X25

network

14.

[0005]

More

precisely,

the

?rst

host

8

comprises

a

?rst

processing

unit

10

running

an

X25

application

and

an

X25

interface 12.

The

X25

application

may

be

any

type

of

applications.

The

X25

interface

12

is

adapted

to

connect

the

?rst

processing

unit

10

running

an

X25

application

to

the

X25

network

14.

[0006]

The

second

host

16

comprises

a

second

processing

unit

20

running

an

X25

application

and

an

X25

interface

18.

The

X25

application

running

on

the

second

processing

unit

20

may

be

any

type

of

X25

application.

The

X25

interface

18

is

adapted

to

connect

the

second

processing

unit

running

an

X25

application

20

to

the

X25

network

14.

[0007]

Unfortunately,

the

cost

of

setting

up

data

networks

operating

with

the

X25

communication

protocol

is

quite

expensive

in

comparison

to

the

cost

for

setting

up

data

networks

operating

with

other

data

packet

protocols.

Various

solutions

have

been

implemented

for

addressing

this

cost

issue.

For

example

a

TCP/IP

network

may

be

used

to

transmit data

packets.

[0008]

The

use

of

X25

over

TCP/IP,

also

known

as

XOT,

tries

to

addresses

this

issue.

Unfortunately

using

XOT

leads

to

various

drawbacks.

For

instance,

it

is

known

by

the

skilled

addressee

that

TCP,

which

is

used

on

XOT,

requires

an

overhead

for

signaling.

Furthermore,

XOT

is

usually

imple

mented on

a

dedicated

network

device

(X25

to

IP

gateway)

which

therefore

requires

extra

hardware.

[0009]

There

is

therefore a

need

for

a

method

and

appa

ratus

that

will

overcome

at

least

one

of

the

above-identi?ed

drawbacks.

SUMMARY

OF

THE

INVENTION

[0010]

In

one

of

its

aspects,

the

invention

provides

a

method

for

enabling

an

application

communicating

using

a

?rst

communication

protocol

to

communicate

with

a

physi

cal

network

interface

communicating

using

a

second

com

munication

protocol.

Jun.

8,

2006

[0011]

In

another

aspect,

the

invention

provides

a

method

for

enabling

an

X25

application

to

communicate

over

a

non-X25

data

packet

using

a

corresponding

non-X25

inter

face.

[0012]

According

to

an

embodiment

of

the

invention,

there

is

provided

a

method

for

enabling

an

application

that

uses

a

?rst

communication

protocol

to

communicate

with

a

physical

network

interface

that

uses

a

second

communica

tion

protocol,

the

method

comprising

providing

a

driver

for

simulating

another

network

interface

communicating

with

the

?rst

communication

protocol,

receiving

a

data

packet

from

one

of

the

application

and

the

physical

network

inter

face,

if

the

data

packet

is

received

from

the

application,

using

the

driver

to

encapsulate

the

data

packet

according

to

the

second

communication

protocol

and

providing

the

encapsulated

data

packet

to

the

physical

network

interface

and

if

the

data

packet

is

received

from

the

network

interface,

decapsulating

the

data

packet

to

provide

a

data

packet

suitable

with

the

?rst

communication

protocol

and

providing

the

decapsulated

data

packet

to

the

application

using

the

driver.

[0013]

According

to

another

embodiment

of

the

invention,

there

is

provided

a

driver

for

enabling

an

application

that

uses

a

?rst

communication

protocol

to

communicate

with

a

physical

network

interface

that

uses

a

second

communica

tion

protocol,

the

method

comprising

a

software

imple

mented

network

interface

card

simulating

a

network

inter

face

card

for

the application

operating

according

to

the

?rst

communication

protocol

and

an

encapsulating/decapsulat

ing

unit

encapsulating

a

?rst

given

received

packet

from

the

software

implemented

network

interface

card

according

to

the

second

communication

protocol

and

providing

the

encapsulated

packet

to

the

physical

network

interface;

the

encapsulating/decapsulating

unit

further

decapsulating

a

second

given

received

packet

from

the

physical

network

interface

according

to

the

?rst

communication

protocol

to

provide

a

decapsulated

packet

and

further

providing

the

decapsulated

packet

to

the

application.

BRIEF

DESCRIPTION

OF

TIIE

DRAWINGS

[0014]

Further

features

and

advantages

of

the

present

invention

will

become

apparent

from

the

following

detailed

description,

taken

in

combination

with

the

appended

draw

ings,

in

which:

[0015]

FIG.

1

is

a

block

diagram

showing

a

prior

art

embodiment

where

a

?rst

host

comprising

a

?rst

processing

unit

running

an

X25

application

communicates

with

a

second

host

comprising

a

second

processing

unit

running

another

X25

application

using

an

X25

network;

[0016]

FIG.

2

is

a

block

diagram

showing

an

embodiment

of

the

invention

in

a

system

where

a

?rst

host

comprising

a

?rst

processing

unit

running

an

X25

application

communi

cates

with

a

second

host

comprising

a

second

processing

unit

running

an

X25

application

and

a

third

host

comprising

a

third

processing

unit

running

an

X25

application;

[0017]

FIG.

3

is

a

?owchart

showing

a

method

for

inter

protocol

communication

according

to

an

embodiment

of

the

invention;

[0018]

FIG.

4

is

a

?owchart

showing

a

method

for

inter

protocol

communication

according

to

another

embodiment

1 2 3 4 5 6 7 8 9 10

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