Case 2:19-cv-00138 Document 1-2 Filed 04/26/19 Page 1 of 18 PageID #: 13
`Case 2:20-cv-00280-JRG Document 1-2 Filed 08/28/20 Page 1 of 18 PageID #: 18
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`Complaint
`
`EXHIBIT A
`
`U.S. Patent No. 6,922,728
`
`

`

`Case 2:20-cv-00280-JRG Document 1-2 Filed 08/28/20 Page 2 of 18 PageID #: 19
`
`(12) United States Patent
`Cho
`
`(54) OPTIMAL INTERNET NETWORK
`CONNECTING AND ROAMING SYSTEM
`AND METHODADAPTED FOR USER
`MOVING OUTDOORS OR INDOORS
`
`tor: Dong-Ho Cho, Seoul (KR
`75) I
`(75) Inventor
`ong-Ho Cho, Seoul (KR)
`(73) Assignee: Korea Advanced Institute of Science
`& Technology, Taejon (KR)
`Subject to any disclaimer, the term of this
`patent is extended or adjusted under 35
`U.S.C. 154(b) by 754 days.
`
`(*) Notice:
`
`(21) Appl. No.: 10/024,875
`(22) Filed:
`Dec. 18, 2001
`O
`O
`(65)
`Prior Publication Data
`US 2002/0198977 A1 Dec. 26, 2002
`O
`O
`2
`Foreign Application Priority Data
`(30)
`Jun. 20, 2001 (KR)
`2001-34976
`(51) Int. Cl." ................................................ G06F 15/16
`(52) U.S. Cl. ........................ 709/227; 709/250; 709/238
`(58) Field of Search ................................. 709/238, 250,
`709/227
`
`• 4 -
`
`4 - - -
`
`vu au way
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`- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
`
`USOO6922728B2
`(10) Patent No.:
`US 6,922,728 B2
`(45) Date of Patent:
`Jul. 26, 2005
`
`5/2004 Mizutani et al. ............ 370/338
`6,731,621 B1
`6,760,601 B1 * 7/2004 Suoknuuti et al. .......... 455/557
`FOREIGN PATENT DOCUMENTS
`
`3/1998
`
`WO PCT/SE98/OO536
`* cited by examiner
`Primary Examiner Mehmet B. Geckil
`(74) Attorney, Agent, or Firm-Graybeal Jackson Haley
`LLP
`ABSTRACT
`(57)
`The present invention relates to an internet network con
`necting and roaming System and method providing internet
`communication Service to a data communication carried by
`a user moving indoors or outdoors. In the present invention,
`the user is provided with a communication Service by
`connecting with an outdoor wireleSS internet network Such
`as an outdoor wireleSS LAN or packet network when the user
`is located outdoors. Then, upon receiving indoor System ID
`information, it is determined whether the received indoor
`System ID information is identical to Stored indoor System
`identical to each other, the communication route of the data
`communication terminal is Switched from the outdoor wire
`leSS internet network to the indoor gateway, and makes
`wireleSS communications with the indoor gateway through
`an indoor wireless connection module. Before the Switching
`of the communication route, the location of the data com
`munication terminal is authenticated by a location register
`and Stored therein.
`
`ID information. If the two indoor system ID informations are
`
`21 Claims, 7 Drawing Sheets
`
`(56)
`
`References Cited
`
`U.S. PATENT DOCUMENTS
`6,519,644 B1 * 2/2003 Lindquist et al. ........... 709/227
`6,600,924 B1 * 7/2003 Sinivaara et al. ........... 455/444
`
`
`
`INTIALZ PDA
`
`SO
`
`MAKE WEREESSINTERNE CALL THROUGH
`OUTDOOR WIRELESS INTERNITNETWORK
`
`S11
`
`
`
`
`
`
`
`
`
`
`
`S RECEIVED
`NO00R SYSTEM D NFORMATON EC
`O STORED INDOOR SYSTED
`INFORMATON
`YES
`REGISTER LOCATION CHANGE INTOLOCATION
`OBE IP THROUGH NOOR OR EFSF
`THROUGH AUTHENTCATION OF LOCATIONBYLOCATEGISTER
`
`S3
`
`
`
`
`
`
`
`
`
`
`
`
`
`
`
`
`
`S4
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`MAKE WIREESS COUNCAT
`INDOOR GATEWAY AND ES Ei
`
`TRANST WOICE SIGNALS TONTERNET
`PHONE NETWORK THROUGH INDOORGAAY
`
`SS
`
`VOICE INFORMATION ON RECIPIENT IS RECEIVED
`BYUSER'S TERMINAL TROUGH NOOOR GATEWAY
`AND BLUETOOTH NODULE FROM INTERNET PHONE
`NETWORK, AND INTRNet WOICE CALL BEEE
`RECIPIENT AND SER SHADE
`
`ST
`
`
`
`S RAFC
`CONGESTED OR S NDOOR
`NETWORK ABNORMA
`
`S18
`
`USE OUTDOOR WIRELESS INTERNE NETWORKNS19
`
`co
`
`

`

`Case 2:20-cv-00280-JRG Document 1-2 Filed 08/28/20 Page 3 of 18 PageID #: 20
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`U.S. Patent
`
`Jul. 26, 2005
`
`Sheet 1 of 7
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`US 6,922,728 B2
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`29
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`

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`Case 2:20-cv-00280-JRG Document 1-2 Filed 08/28/20 Page 4 of 18 PageID #: 21
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`U.S. Patent
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`Jul. 26, 2005
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`Sheet 2 of 7
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`US 6,922,728 B2
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`
`
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`NWT SSETEHIM
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`3:--| TWN IWEL
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`

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`Case 2:20-cv-00280-JRG Document 1-2 Filed 08/28/20 Page 5 of 18 PageID #: 22
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`U.S. Patent
`
`Jul. 26, 2005
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`Sheet 3 of 7
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`US 6,922,728 B2
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`0/
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`09
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`09
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`?y17ZZ
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`0/001
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`SSBTEJH IM HOOGIN?
`NYT
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`

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`Case 2:20-cv-00280-JRG Document 1-2 Filed 08/28/20 Page 6 of 18 PageID #: 23
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`U.S. Patent
`
`Jul. 26, 2005
`
`Sheet 4 of 7
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`US 6,922,728 B2
`
`FIG. 3
`
`( START
`
`
`
`NTALZE PDA
`
`S10
`
`MAKE WIREESSINTERNECALL THROUGH
`OUTDOOR WIRELESS INTERNET NETWORK
`
`S1
`
`
`
`
`
`
`
`
`
`S RECEIVED
`INDOOR SYSTEM D NFORMATION EQU
`TO STORED INDOOR SYSTEM O
`S13
`NFORMATION?
`(
`YES
`REGISTER LOCATION CHANGE INTO LOCATION REGISTER USING
`MOBILE P THROUGH INDOOR OR OUTDOOR NETWORK AND GO
`THROUGH AUTHENTCATION OF LOCATION BY LOCATION REGISTER
`
`SWITCH TO BLUE TOOTH COMUNICATION MODENsia
`MAKEWBELESSCOMMUNICATIONSTROUGH Nuss
`NDOOR GATEWAY AND BLUETOOTH MODULE
`
`NSMY90SENASQNERN
`PHONE NETWORK THROUGH INDOOR GATEWAY
`
`NS16
`
`VOICE INFORMATION ON RECIPIENT S RECEIVED
`BY USER'S TERMINAL THROUGH NDOOR GATEWAY
`AND BLUETOOTH MODULE FROM INTERNET PHONE
`NETWORK, AND INTERNET VOICE CALL BETWEEN
`RECIPIENT AND USER IS MADE
`
`S7
`
`
`
`S TRAFFC
`CONGESTED OR IS INDOOR
`NETWORK ABNORMAL
`YES
`USE OUTDOOR Y RELESS INTERNET NETWORK
`
`S18
`P
`
`
`
`S 19
`
`END
`
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`

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`Case 2:20-cv-00280-JRG Document 1-2 Filed 08/28/20 Page 7 of 18 PageID #: 24
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`U.S. Patent
`
`Jul. 26, 2005
`
`Sheet 5 of 7
`
`US 6,922,728 B2
`
`FIG. 4
`
`
`
`
`
`NTIAL. ZE PDA
`
`S2O
`
`MAKE WRELESS INTERNET CALL THROUGH
`OUTDOOR WRELESS INTERNET NETWORK
`
`S2
`
`S RECEIVED
`NDOOR SYSTEM D INFORMATION EQUA
`TO STORED INDOOR SYSTEM ID
`NFORMATION?
`
`S23
`
`
`
`
`
`
`
`
`
`
`
`REGISTER LOCATION CHANGE INTO LOCATION REGISTER USING
`MOBILE P THROUGH INDOOR OR OUTDOOR NETWORK AND GO
`THROUGH AUTHENTCATION OF LOCATION BY LOCATION REGISTER
`
`
`
`
`
`
`
`
`
`
`
`
`
`
`
`
`
`
`
`
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`SWITCH TO BLUE TOOTH COMMUNICATION MODENS24
`
`MAKE WIRELESS COMMUNICATIONS THROUGH
`NOOOR GATEWAY AND BLUETOOTH MODULE
`
`CONNECT WITH WRED INTERNET
`NETWORK THROUGH INDOOR GATEWAY
`
`INTERNET DATA SERVICE IS PROVIDED
`HROUGH NOOOR GATEWAY
`
`
`
`S28
`
`
`
`S TRAFFC
`CONGESTED OR IS NOOOR
`NETWORK ABNORMAL2
`YES
`USE OUTDOOR WIRELESS INTERNET NETWORK
`
`S25
`
`S26
`
`S27
`
`S29
`
`END
`
`

`

`Case 2:20-cv-00280-JRG Document 1-2 Filed 08/28/20 Page 8 of 18 PageID #: 25
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`U.S. Patent
`
`Jul. 26, 2005
`
`Sheet 6 of 7
`
`US 6,922,728 B2
`
`FIG. 5
`
`NTALZE POA
`
`
`
`S3
`
`
`
`IS RECEIVEO
`INDOOR SYSTEM D NFORMATION EQUA
`TO STORED NOOOR SYSTEM ID
`NFORMATION?
`
`REGISTER LOCATION INTO LOCATION REGISTER THROUGH INDOOR
`OR OUTDOOR WRELESS INTERNET NETWORK AND GO THROUGH
`AUTHEN CATION OF LOCATION BY LOCATION REGISTER
`
`SET AS BLUETOOTH COMMUNICATION MODE
`
`
`
`
`
`CONNECT WITH INDOOR GATEWAY
`HROUGH BLUETOOTH MODULE
`
`S34
`
`RANSMT CALL ORIGINATING MESSAGEr-S35
`
`CONNEC W H WRED NERNET PHONE
`NETWORK THROUGH NOOOR GATEWAY
`
`S34
`
`MAKE CALL WITH RECIPIENT
`
`S37
`S38
`
`YES
`
`S REGISTERED
`NDOOR SYSTEM D INFORMATION
`RECEIVED2
`NO
`REGISTER LOCATION CHANGE INTO LOCATION REGISTER
`RUSH 999 REESSINTERNENEORSANGOs
`THROUGH AUTHENTCATION OF LOCATION BY LOCATION REGISTER
`y
`SWITCH TO OUTDOOR COMMUNICATION MODE NS40
`
`
`
`MAKE CALL WITH RECIPIENT THROUGH
`OUTDOOR WIRELESS INTERNET NETWORK
`
`
`
`S41
`
`

`

`Case 2:20-cv-00280-JRG Document 1-2 Filed 08/28/20 Page 9 of 18 PageID #: 26
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`U.S. Patent
`
`Jul. 26, 2005
`
`Sheet 7 of 7
`
`US 6,922,728 B2
`
`FIG. 6
`
`
`
`! NTALZE PDA
`
`
`
`
`
`S RECEIVED
`NOOOR SYSTEM D NFORMATION EQU
`TO STORED NOOOR SYSTEM O
`INFORMATION?
`
`S61
`
`NO
`
`REGISTER LOCATION INTO LOCATION REGISTER THROUGH INDOOR
`OR OUTDOOR WIRELESS INTERNET NETWORK AND GO THROUGH
`AUTHENT CAON OF LOCAON BY LOCAON REGISTER
`
`SET AS BLUETOOTH COMMUN CATION MODE
`
`CONNECT WITH INDOOR GATEWAY
`THROUGH BLUETOOTH MODULE
`
`TRANSMT CALL ORIGNATING DATA MESSAGE
`
`USE INTERNET SERVICE
`
`S REGISTERED
`NDOOR SYSTEM D INFORMATION
`RECEIVED?
`
`
`
`
`
`REGISTER LOCATION CHANGE INTO LOCATION REGISTER
`THROUGHOUTDOOR WIRELESS INTERNET NETWORK AND GO
`THROUGH AUTHENT CATION OF LOCATION BY LOCATION REGISTER
`
`
`
`
`
`SWITCH TO OUTDOOR COMMUN CATION MODE
`
`S7O
`
`USE WIRELESS INTERNET SERVICE THROUGH
`OUTDOOR Y RELESS INTERNET NETWORK
`
`S71
`
`
`
`
`
`
`
`
`
`
`
`
`
`
`
`

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`Case 2:20-cv-00280-JRG Document 1-2 Filed 08/28/20 Page 10 of 18 PageID #: 27
`
`US 6,922,728 B2
`
`1
`OPTIMAL INTERNET NETWORK
`CONNECTING AND ROAMING SYSTEM
`AND METHODADAPTED FOR USER
`MOVING OUTDOORS OR INDOORS
`
`FIELD OF THE INVENTION
`The present invention relates to a wireleSS mobile
`communication, and more particularly, to an optimal internet
`network connecting and roaming System and method for
`Switching connection with an internet network in accordance
`with a user's location by allowing a wireleSS data commu
`nication terminal to be connected with a wired internet
`network through an indoor wireleSS connection module
`when the wireleSS data communication terminal is located
`indoors and by allowing it to be connected with a wireleSS
`internet network when it is located outdoors.
`
`1O
`
`15
`
`25
`
`BACKGROUND OF THE INVENTION
`Currently, the internet is being utilized as an essential
`communication media. Information provision and confirma
`tion through the internet have been common and there is a
`growing tendency for wide use of the internet.
`In order to use the internet, a terminal (Such as a computer,
`a PCS phone, a cellular phone, a notebook PC, and a PDA)
`including a chip or a device capable of making connection
`with the internet is required. However, each terminal can be
`connected with the internet in different manners. For
`example, a computer or a notebook PC is connected with the
`internet through a wire, while a PCS phone, a cellular phone,
`or a PDA is connected with the internet based on a wireless
`communication protocol. If necessary, a computer or note
`book PC can be connected with the internet through the
`wireleSS communications by connecting a PCS phone there
`with.
`AS for methods of connecting with the internet through
`the wireleSS communications, there are a method of con
`necting with the internet by using an external mobile com
`munication network including a base Station, a base Station
`40
`controller, a mobile Switching center and the like; a method
`of connecting with the internet through an outdoor wireleSS
`LAN (local area network) by using a wireless LAN card; a
`method of connecting with the internet through a wireleSS
`packet network, and the like.
`Among them, the wireleSS LAN is a data communication
`network implemented as expansion or Substitution of the
`wired LAN, and employs a method of transmitting and
`receiving data in the air by using a radio frequency or
`infrared rays instead of a wire (for example, 10/100 Base).
`Considering its coverage, capability, Security, and the like, a
`spread spectrum type of wireless LAN that uses ISM
`(industrial scientific medical) bands (902-928 MHz,
`2.4-2.48 GHz, 5.725-5.85 GHz) has been most widely used.
`Further, the wireleSS packet internet network provides
`internet Services in a packet mode by using frequently bands
`of 900 MHZ and 1.8-2 GHZ.
`Generally, a user of the wired LAN connects with an LAN
`Server through a cable by using a computer or notebook PC
`when he/she is located indoors and then also connects with
`an external internet network. In addition, a user of the
`outdoor wireless LAN network or wireless packet internet
`network connects with the internet indoors or outdoors
`through a network comprising an antenna, an access point,
`a router (or a hub or bridge), and the like by using a notebook
`65
`PC with a wireless internet connection module or a PDA
`housed therein.
`
`35
`
`45
`
`50
`
`55
`
`60
`
`2
`Meanwhile, the user of the wired LAN pays only fixed
`fees contracted with a relevant Service provider, while the
`user of the wireleSS LAN must pay fees in proportion to the
`number of packets the user has sent and received through the
`connected internet Furthermore, Since the fees for connec
`tion with the internet through the wireless LAN are rela
`tively high, the wired LAN is more economical than the
`wireleSS LAN on a monthly payment basis.
`Therefore, there is a problem in that users of the wireless
`LAN inevitably take on heavier monetary burdens than users
`of the wired LAN. Furthermore, there is also another prob
`lem in that when using the wireleSS LAN or a packet module,
`the quality of information becomes worse and a transmission
`speed thereof becomes slower than that of the wired LAN.
`SUMMARY OF THE INVENTION
`The present invention is contemplated to Solve aforemen
`tioned problems. An object of the present invention is to
`provide an internet connection Switching System and method
`which allows a user to connect with the internet through an
`indoor wired LAN when a mobile data communication
`terminal is located indoors and allows the user to connect
`with the internet through a wireless LAN network or an
`outdoor wireless internet network of a wireleSS packet
`network when it is located outdoors.
`Another object of the present invention is to allow a user
`to receive an incoming call at a low cost regardless of
`whether the user is located indoors or outdoors.
`A further object of the present invention is to provide a
`Service through other external networks upon originating or
`receiving of a call in a case where the traffic of an indoor
`network is congested or a failure that cannot be fixed occurs.
`According to the present invention for accomplishing the
`aforementioned objects, network paths (i.e. connection paths
`of a communication network) capable of connecting with the
`internet, a PSTN, or the like are switched depending on
`whether a user is located indoors or outdoors. That is, when
`the user is located indoors, a user's wireleSS internet terminal
`is connected with an indoor-wired LAN through wireless
`communication module. Alternatively, when the user is
`located outdoors, the user's wireleSS internet terminal is
`connected with an outdoor wireless internet network (a
`network which can be wirelessly connected with the
`internet) Such as a wireless LAN network and a wireless
`packet network. Better communication quality with a lower
`cost is guaranteed to the user Since the network connection
`can be Switched in accordance with the location or move
`ment of the user. At this time, a roaming Service is provided
`through an optimal network path depending on whether the
`user is located indoors or outdoors.
`In the present invention, an indoor wireleSS connection
`module is embedded into both a wireless internet terminal
`and an indoor gateway (including internet communication
`apparatus), that is, an apparatus connected with a wired
`LAN Such that the user's wireless internet terminal can be
`connected with an indoor wired LAN. Thus, the wireless
`communications between the two communication apparatus
`can be made indoors.
`Here, the indoor wireleSS connection module is an appa
`ratus capable of Supporting communication of data, Voice,
`and the like between communication equipments located at
`Short range. Further, the indoor wireleSS communication
`module is embedded into a wireless internet terminal Such as
`a PDA, a notebook PC, a PCS phone and a cellular phone;
`indoor home appliances Such as a desktop computer, a
`Scanner, a facsimile, a TV and a printer; and other commu
`
`

`

`Case 2:20-cv-00280-JRG Document 1-2 Filed 08/28/20 Page 11 of 18 PageID #: 28
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`US 6,922,728 B2
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`4
`Step of going through authentication of an indoor location of
`the data communication terminal by the location register and
`Storing the indoor location into the location register if it is
`determined in the second step that the two of ID information
`are equal to each other, a fourth Step of connecting with the
`internet network by Switching connection of the data com
`munication terminal from the outdoor wireleSS internet
`network to the indoor gateway and making wireleSS com
`munications through the indoor gateway and an indoor
`wireleSS connection module; a fifth Step of, when the data
`provided from the internet network in accordance with
`location information Stored in the location register are
`transferred to the indoor gateway, Supplying the data com
`munication terminal with the data through the indoor gate
`way and the indoor wireleSS connection module; a sixth Step
`of going through authentication of an outdoor location of the
`data communication terminal by the location register and
`Storing the outdoor location into the location register when
`the indoor System ID information is not received; and a
`Seventh Step of Switching the connection of the data com
`munication terminal from the indoor gateway to the Outdoor
`wireleSS internet network and performing the first Step again.
`Preferably, the indoor location stored in the location
`register includes the indoor System ID.
`
`BRIEF DESCRIPTION OF THE DRAWINGS
`The above and other objects and features of the present
`invention will become apparent from the following descrip
`tion of preferred embodiments given in conjunction with the
`accompanying drawings, in which:
`FIGS. 1A and 1B are diagrams illustrating examples of
`the configuration of an outdoor wireleSS internet network
`employed in the present invention;
`FIG. 2 is a diagram showing the configuration of an
`optimal wireleSS internet network connecting and roaming
`System adapted for a user who moves outdoors or indoors
`according to an embodiment of the present invention;
`FIG. 3 is a flowchart illustrating how a connection
`Switching Service is provided when a user moves indoors
`while making a wireleSS internet call according to the
`embodiment of the present invention;
`FIG. 4 is a flowchart illustrating how a connection
`Switching Service is provided when a user moves indoors
`while making a wireleSS internet data communications
`according to the embodiment of the present invention;
`FIG. 5 is a flowchart illustrating how a connection
`Switching Service is provided when a user moves outdoors
`while making the wireleSS internet call according to the
`embodiment of the present invention; and
`FIG. 6 is a flowchart illustrating how a connection
`Switching Service is provided when a user moves outdoors
`while making the wireless internet data communications
`according to the embodiment of the present invention.
`DETAILED DESCRIPTION OF THE
`INVENTION
`Hereinafter, a method of Switching connection between
`indoor and outdoor wireleSS internet networks when a user
`moves indoors or outdoors according to an embodiment of
`the present invention will be explained with reference to the
`accompanying drawings.
`First, in the present invention, when a user is located
`indoors, an indoor wireleSS connection module and an
`indoor gateway (a gateway Such as a home gateway or an
`IAD disposed in a home or building, or an internet commu
`
`3
`nication equipments and computer-aided equipments. Thus,
`the wireleSS communications can be made between the
`wireleSS internet terminal, and the home appliances, com
`munication equipments and computer-aided equipments.
`Therefore, a Bluetooth module, a wireless LAN connec
`tion module, a wireleSS packet communication connection
`module, and the like may be used as the indoor wireleSS
`connection module.
`The present invention includes a location register for
`Storing location information transmitted from the wireleSS
`internet terminal in order to confirm as to whether the user
`of the wireleSS internet terminal is located indoors or out
`doors. The present invention can Switch network paths to
`provide the roaming Service in accordance with the location
`information Stored in the location register.
`In order to determine whether the wireless internet ter
`minal is located indoors or Outdoors, the wireleSS internet
`terminal determines whether ID information of an indoor
`System broadcasted from the indoor gateway is received,
`and in particular, whether the received ID information of the
`indoor System is equal to the Stored ID information.
`Accordingly, according to an aspect of the present inven
`tion for achieving the above objects, there is an optimal
`internet network connecting and roaming System providing
`internet communication Service to a data communication
`terminal of a user moving indoors or outdoors, being char
`acterized in that, the data communication terminal includes
`an indoor wireleSS connection module and Stores registered
`indoor System ID information, So that the data communica
`tion terminal may be connected with the indoor network if
`the registered indoor System ID information is received and
`may be connected with the Outdoor wireleSS internet net
`work if the registered indoor system ID information is not
`received; the indoor gateway includes an indoor wireleSS
`connection module therein, broadcasts the indoor System ID
`information, makes wireleSS communications with the data
`communication terminal through the indoor wireleSS con
`nection module, and is connected with the internet network
`via a wire; the location register Stores location information
`of the data communication terminal received through the
`indoor network or outdoor wireleSS internet network; and the
`router determines the location of the data communication
`terminal Stored in the location register and provides roaming
`of Voice/data Signals transfered to the user by Selecting one
`of the indoor and the outdoor networks in accordance with
`the determined location of the data communication terminal.
`When the data communication terminal is located
`outdoors, the location information is information on a loca
`tional area; and when it is located indoors, the location
`information is indoor system ID information.
`Furthermore, according to another aspect of the present
`invention for achieving the above objects, there is an optimal
`internet network connecting and roaming method for pro
`Viding internet communication Service to a data communi
`cation terminal of a user moving indoors or outdoors using
`a communication System comprising an outdoor wireleSS
`internet network including an antenna, a router and a loca
`tion register, and an indoor network including an indoor
`gateway connectable with an internet network, comprising a
`first Step of providing the user with a communication Service
`by connecting with the outdoor wireleSS internet network
`when the user is located outdoors, a Second Step of deter
`mining whether when indoor system ID information is
`received by the data communication terminal and the
`received indoor system ID information is identical to indoor
`System ID information Stored in the location register; a third
`
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`US 6,922,728 B2
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`15
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`6
`95C1X, 95C1XEVDO (HDR), 95C1XEVDO, and the like
`are referred to as a wireleSS packet communication module,
`and data information is received and transmitted between a
`terminal and a base station (access point) in a wireless
`packet mode.
`Further, the home gateway (hereinafter, referred to as
`“HG') is a core apparatus for home information technology
`that connects a wireleSS/wire access network (Subscriber
`network) with a home (indoor) network. In other words, it is
`an apparatus for interconnecting indoor network
`equipments, such as the Bluetooth and a home PNA
`(Phoneline Networking Alliance) which connects two or
`more terminals installed indoor with the wire/wireless com
`munication network, with a Subscriber network using an
`ADSL, a CATV network and the like.
`The home gateway provides Sharing of indoor resources,
`various additional Services Such as entertainment, education,
`medical examination, and home Shopping using a network;
`remote automatic control using a portable information ter
`minal; home Security function, and the like, in addition to a
`Super-high Speed internet Service and a real-time multimedia
`Service.
`Therefore, the indoor connection network of the present
`invention allows a communication equipment of a user
`moving indoors to be connected with the indoor gateway
`through the indoor wireleSS connection module, and allows
`the indoor gateway to be responsible for connection with the
`internet network.
`First, the configuration of an outdoor wireleSS internet
`network applied to the present invention will be described
`with reference to FIGS. 1a and 1b. FIGS. 1a and 1b are
`diagrams showing examples of the configuration of a gen
`eral outdoor wireleSS internet network.
`FIG. 1a shows the configurations of an outdoor wireless
`LAN network connected with the internet through an access
`point, and a wireleSS packet network. The outdoor wireleSS
`LAN network includes a data communication terminal 10;
`antennas 31, 32; access points 21, 22; a plurality of routers
`41, 42, 43; and a location register 80. Meanwhile, in a
`wireleSS packet communication, mobile IP-based wireleSS
`internet Services are provided by using a wireleSS packet
`communication module Such as a 95C1X, 1XEVDO, and
`1XEVDV. The wireless packet communication network
`comprises of an antenna 33, a BTS (Base Transceiver
`Station) 90, a BSC (Base Station Controller) 91, a router 92,
`and a location register 80.
`FIG. 1b shows the configuration of an outdoor wireless
`LAN network connected with the internet through a wireless
`router. The outdoor wireless LAN network includes a data
`communication terminal 10; antennas 34, 35; a Subscriber
`wireless router 44; an edge wireless router 45; a router 46;
`and a location register 80.
`In FIGS. 1a and 1b, the respective routers are connected
`with one another and are connected with the internet. The
`internet 50 is connected with a PSTN 70 through a VoIP
`gateway 60.
`The data communication terminal 10 is a PDA, a note
`book PC or the like carried by a user, and contains a wireless
`LAN card therein so that data can be transmitted and
`received by using radio waves.
`Antennas 31, 32 and 33 are installed to the access points
`21, 22, and the BTS 90, respectively, so that data can be
`transmitted and received between a terminal and the access
`points 21, 22 or the BTS 90.
`The access points 21, 22 are apparatus that are generally
`installed at a building and used for connection of a conven
`
`S
`nication apparatus) are used. Further, when the user is
`located outdoors, an ordinary outdoor wireleSS internet net
`work is used. Therefore, when the user moves indoors, the
`present invention allows the connection with the communi
`cation network to be switched from the ordinary outdoor
`wireleSS internet network to an indoor communication net
`work in which the communication is made through an
`indoor wireleSS connection module.
`On the contrary, when a user moves outdoors, the present
`invention allows the connection with the communication
`network to be switched from the indoor network using the
`indoor wireleSS connection module to the ordinary outdoor
`wireleSS internet network.
`Now, a Bluetooth module, a wireless LAN connection
`module and a wireleSS packet communication connection
`module which are the indoor wireleSS connection modules,
`and the home gateway will be described.
`The Bluetooth is a short-range wireleSS communication
`technology that allows the multi-purpose connection to be
`made irrespective of types of conventional communication
`equipments, home and office appliances. The Bluetooth has
`been developed for the purpose of eliminating wire cables
`for data communications which are used for connection
`between a mobile phone, a PC, a digital Still camera, a
`printer, a PDA, a gaming device and the like. At present, the
`Standards thereof are being established by five leading
`companies including EricSSon Inc. in Sweden, IBM Corp. in
`U.S.A., Intel Corp. in U.S.A., Nokia Inc. in Finland, and
`TOSHIBA Corp. in Japan. Many companies including Eric
`SSon Inc., CSR etc. produce Bluetooth chips.
`A network that is constructed using the Bluetooth capable
`of Supporting communication between various types of
`devices is called a WPAN (Wireless Personal Area
`Network). In a WPAN environment, an information device
`carried by a user is wirelessly connected with other adjacent
`information devices by using a Bluetooth protocol. In this
`way, a conventional Standalone portable information termi
`nal is combined with peripheral devices or devices con
`nected with an external network So that highly advanced
`functions that are convenient to the user and that have been
`difficult to realize so far can be realized.
`To this end, the Bluetooth uses a 2.4 GHz ISM (Industrial
`Scientific Medical) band that is a license-free band operable
`worldwide. In addition, the Bluetooth channel uses a
`FH/TDD (frequency-hop/time-division-duplex) mode, and
`this channel is divided into 625 msec time intervals as called
`Slots. Different hop frequencies are used for the respective
`Slots, and a hop rate is 1,600 hopS/sec. Slots are alternately
`received and transmitted in the TDD mode.
`In order for a user to actually use the Bluetooth through
`an application program, Software that controls RF (radio
`frequency) and baseband Signal processing hardware and
`connects the hardware to the application program is
`required. In a Bluetooth Specification, a Software protocol
`used for this object is described hierarchically, and it is well
`known in the art and thus will not be described in detail
`herein.
`A wireleSS LAN connection module is an apparatus for
`allowing data communications between short-range com
`munication equipments in a wireleSS LAN mode. A wireleSS
`60
`communication packet module is an apparatus for allowing
`wireleSS communications between short-range communica
`tion equipments among wireleSS LAN terminals, or between
`a communication equipment and a wireleSS communication
`terminal.
`A bi-directional pager module, a wireleSS data module,
`and a mobile packet data module such as GPRS, EDGE,
`
`65
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`35
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`45
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`Case 2:20-cv-00280-JRG Document 1-2 Filed 08/28/20 Page 13 of 18 PageID #: 30
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`US 6,922,728 B2
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`7
`tional wired LAN with a wireless LAN. In addition, the
`access points 21, 22 are connected with the wired LAN and
`provide functions of data transmission and buffering. One
`access point can Support Several tens to Several hundreds of
`users and cover a range of Several kilometers.
`The routers perform function to transmit messages to the
`internet based on information provided thereto by a network
`protocol. More specifically, Several hundreds to Several
`thousands of computers communicate with one another in
`accordance with the predetermined addresses assigned to
`respective devices thereof. AS the network becomes larger,
`it is impossible for every computer in the internet to memo
`rize all the addresses of the other computers. Thus, there is
`a need for a Scheme to allow every computer to communi
`cate with each other only using a Small amount of informa
`tion without requiring all address information. Such a
`Scheme can be constructed by dividing the internet network.
`Of course, in Such a System, networks are interconnected
`with each other. Each of these divided networks is called a
`Sub network, and a Specific computer for interconnecting
`these Sub networks is called a router. Thus, by using an
`aforementioned Scheme, it is required that network comput
`erS recognize only their own networks in the internet without
`recognizing all address information of all the network com
`puters.
`25
`A wireleSS router is an apparatus having a wireleSS packet
`function in addition to the function of the router.
`Therefore, in the outdoor wireless LAN shown in FIG.1a,
`an internet connection request signal (i.e. internet IP
`address) generated at the data communication terminal 10 is
`transmitted to an available wired LAN network through the
`access point 21 or 22. Then, the router 41 connected with the
`available wired LAN network transfers the connection
`request Signal to another router 42, and the router 42 also
`transferS the connection request Signal to the other router.
`After Successively performing the transfer of the connection
`request signal between the routers, the connection request
`signal is finally transferred to the router 43 connected with
`the relevant internet Server. Since an internet connection
`path is formed via a plurality of routers 41, 42, 43, the user
`can connect with the internet 50. At this time, the location
`info