Periphery device in a wireless network

Details Periphery device in a wireless network Periphery device in a wireless network

1998-06-09

2004-09-14

Luther, William (Department: 2664)

Multiplex communications

Communication over free space

Having a plurality of contiguous regions served by...

C370S401000, C370S469000

Reexamination Certificate

active

06791956

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to a periphery device that can transmit data to the Internet without host (personal computer or notebook computer), especially relates to a wireless periphery device that can transmit data to the Internet with only local area network server.
2. Description of the Prior Art
If the Internet phone or the video conference is to be performed in a Local Area Network (LAN), as shown in
FIG. 1A
, the corresponding periphery devices such as camera
103
, microphone
104
, speaker
102
, and monitor must be electrically coupled to the computer
100
(PC or notebook computer). Because the signal sent from the periphery device to the computer must be of an analog format. In order to digitize the signal mentioned above, the interface card proceed with the signal from the periphery device, and then the TCP/IP header is added to the digitized signal mentioned above, thus the frame is obtained. In the following step, the frame is transmitted using radio wave, and the structure of the frame
110
is shown in FIG.
1
B.
The access point
105
(
FIG. 1A
) receives the frame from the computer
100
and converts the received frame to form the frame
120
shown in FIG.
1
C. The frame
120
is sent to the Internet
109
through the gateway (not shown in FIG.
1
A). Due to the IP address of the destination computer, the frame
120
is sent to the gateway
112
of the local area network
102
. Then the access point
160
converts the received packet to the format of the frame
110
, and transmitted the converted packet to the computer
128
using radio wave. The computer
128
unpacks the frame (converted packet) to acquire the data inside the frame to transfer to the periphery device. When the signal is transferred from computer
120
to computer
100
, the signal can operate according to the principle mentioned above. So the periphery devices of the two computers can transmit data to each other. So the Internet phone and the video conference can be performed in the wireless local area network through Internet.
The structure of the frame that sent by computer
100
is shown in
FIG. 1B
as the frame
110
, in which the data
19
is the data itself. The TCP (Transmission Control Protocol) layer header
117
is provided for the application program to ensure the data can arrive at the computer through the Internet. The IP (Internet Protocol) layer header
115
is used to determine the path that the datagram arrives at the destination computer, to define the Internet's address, and to implement unpacking as well as reforming of the frame. The MAC (Media Access Control) layer source address
113
is the address in the MAC layer of the source transmitting the frame. In this example shown in
FIG. 1A
, the MAC layer source address
113
is the hardware address of the network card of computer
100
. The MAC layer destination address
111
is the hardware address of the computer's network card that receiving the frame in the next stage network. In this example shown in
FIG. 1A
, the MAC layer destination address
111
is the address of the gateway
106
in the MAC layer. The MAC layer access point destination address
11
is the hardware address of the access point's (
105
) wireless network card.
After the gateway
106
received the frame
110
, the MAC layer source address
113
and the MAC layer destination address
111
are substituted by the MAC layer source address
123
and the MAC layer destination address
121
respectively. The MAC layer source address
123
stands for the address of the source transmitting the frame
120
, i.e. the gateway
105
's MAC layer address in this example shown in FIG.
1
A. The MAC layer destination address
121
stands for the MAC layer destination address of the host receiving the frame
120
in the next stage. In this example shown in
FIG. 1A
, the MAC layer destination address
121
represents the gateway
124
's MAC layer address, in which the gateway
124
is within the local area network
116
. Gateway
124
transmits the frame
120
to the gateway in the next stage local area network, and the frame is changed in accordance with the forgoing principle, i.e. only the MAC layer address
121
and
123
are substituted.
After the gateway
128
in the local area network
118
has received a frame, the frame
130
shown in
FIG. 1D
is transmitted by gateway
128
. In which the MAC layer destination address
131
is assigned as the MAC layer destination address of the gateway receiving the frame
130
in the next stage. In this example shown in
FIG. 1A
, the MAC layer destination address
131
is the address of the gateway
112
in the local area network
104
. The MAC layer source address
133
represents the address of the source transmitting the frame
130
. In this example shown in
FIG. 1A
, the MAC layer destination address
133
stands for the MAC layer destination address of the gateway
128
in the local area network
118
. Gateway
128
transmits the frame
130
to the gateway in the next stage local area network, and the frame is changed in accordance with the forgoing principle, i.e. substitute the MAC layer address
131
and
133
only.
Because the access point
160
has built up a table for the computer communicating with the access point
160
. Even the MAC layer destination address is not the MAC layer address of access point
160
, the access point
160
will receive the frame that the MAC layer address is the computer's MAC layer address built in the forgoing table. In addition, a MAC layer access point address
151
is added to the frame mentioned above, and the frame being added with the MAC layer access point address
151
is shown as frame
150
in FIG.
1
E.
As shown in
FIG. 1E
, the MAC layer access point address
151
is the MAC layer address of access point
160
. The MAC layer destination address
152
stands for the computer
128
's hardware address, and the MAC layer source address
153
is the MAC layer address of the gateway's network card that transmitting the frame
150
. In this example shown in
FIG. 1A
, the MAC layer source address
163
is the hardware address of the gateway
112
's network card. The IP (Internet Protocol) layer header
154
and the TCP (Transmission Control Protocol) layer header
156
are compared with the address of the computer
128
, if they are matched, the frame will be received and processed by the computer
128
.
The communicating model used by the prior are of the periphery device is the TCP/IP reference model, which includes five layers respectively defines the function used in the data communication. As shown in
FIG. 1F
, every layer has a name, and is not confined to one protocol, instead, the data communication function of every layer can be defined by arbitrary protocols. So a plurality of protocols can be included in a layer, every protocol provides one kind of suitable service for the layer. In transmitting the data from the resident application program to the equivalent remote application program, every layer of the TCP/IP reference models is involved. The higher level transmits the data to the bottom layer of the network depends on the lower layer, and the data is transferred downward through the stack of layers one by one, until the data passes the physical layer to the network. Vice versa, the data is transmitted to the remote application program by passing the data upward through the stack of layers one by one.
After the computer
100
has received the data, the five layers of the TCP/IP reference model can be used to illustrate the data transmission. The reference model
140
shown in
FIG. 1F
includes the application layer
147
, which relates to the protocol of the user's access. The transmission control protocol layer
146
transmits the data between the application layer
147
and the Internet protocol layer
145
when the application program is activated by the user. The Internet protocol layer
145
is used to manage the connection on the network, and to

Affiliated with

Also associated with

Rating

Periphery device in a wireless network does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Periphery device in a wireless network, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Periphery device in a wireless network will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3243643