Apple Exhibit 1020
`Apple Inc. v. Rembrandt Wireless
`IPR2020-00033
`Page 00001
`
`

`

`US. Patent
`
`Mar. 7, 2000
`
`Sheet 1 0f 6
`
`6,034,621
`
` _|lllllllllllllll._meEE__“2:2858%_ozazgaza
`
`023318__
`
`
`
`72:
`
`
`
`N
`
`GEN
`
`23A
`
`0285
`
`onEmz
`
`N2
`
`2:2:
`
`
`
`252252;023318
`
`25238%
`
`_o_newmom
`
`IPR2020-00033 Page 00002
`
`IPR2020-00033 Page 00002
`
`
`
`
`
`
`

`

`US. Patent
`
`Mar. 7, 2000
`
`Sheet 2 0f 6
`
`6,034,621
`
`055221025
`
`mz==om
`
`0232818
`
`2562:
`
`EOE
`
`”Emu”;
`
`Nmm
`
`2;:P
`
`ozaé
`
`éogbz
`
`$252252;
`
`”2:201
`
`oESBIom
`
`2&8”:
`
`SNwowwow
`
`IPR2020-00033 Page 00003
`
`IPR2020-00033 Page 00003
`
`
`
`
`
`
`

`

`US. Patent
`
`Mar. 7, 2000
`
`Sheet 3 0f 6
`
`6,034,621
`
`mm<m
`
`zozfim
`
`ES m.QNK
`
`ES
`
`mm<m
`
`zozfim
`
`m3
`
`X;
`
`ES
`
`E5825:
`
`ES
`
`E>momz<E
`
`oz_N_zo~=._oz>m
`
`MESS
`
`ozzzezom
`
`258E
`
`oENEOmIQEm
`
`MESS
`
`Sm
`
`02.3818
`
`24.52:
`
`$8
`
`IPR2020-00033 Page 00004
`
`IPR2020-00033 Page 00004
`
`
`
`
`
`
`

`

`US. Patent
`
`Mar. 7, 2000
`
`Sheet 4 0f 6
`
`6,034,621
`
`“HEN—231023
`
`mzzzom
`
`9233318
`
`258%
`
`
`
`NovEcoEmu
`
`
`
`E>momz<~zmm<m
`
`2225
`
`oZEZOmIQEm
`
`mzzzom
`
`02—5818
`
`:éooE
`
`.9.wowwow
`
`IPR2020-00033 Page 00005
`
`IPR2020-00033 Page 00005
`
`
`
`
`

`

`US. Patent
`
`Mar. 7, 2000
`
`Sheet 5 0f 6
`
`6,034,621
`
`F] G. 5
`
`PRIOR ART
`
`604
`
`
`
`
`SERIAL
`
`515
`
`SERIAL
`
`
`PORT
`
`PORT
`
`610
`
`602
`
`
`
`
` SCHEDULING
`
`PROGRAM
`
`DATA
`
`SCHEDULING
`PROGRAM
`
`DATA
`
`606
`
`608
`
`612
`
`61 4
`
`FIG. 6
`
`PRIOR ART
`
`722
`
`602
`
`
`
`SCHEDULING
`PROGRAM
`
`DATA
`
`
`
`SCHEDULING
`PROGRAM
`
`DATA
`
`606
`
`608
`
`612
`
`61 4
`
`IPR2020-00033 Page 00006
`
`IPR2020-00033 Page 00006
`
`

`

`US. Patent
`
`Mar. 7, 2000
`
`Sheet 6 0f 6
`
`6,034,621
`
`FIG. 7
`
`PRIOR ART
`
`840
`
`
`INFRARED
`INFRARED
`TRANSCEIVER .: TRANSCEIVER
`LINK
`LINK
`
`842
`
`600
`
`602
`
`
`
`
`
`
`SCHEDUUNG
`
`PROGRAM
`
`DATA
`
`SCHEDUUNG
`
`PROGRAM
`
`DATA
`
`606
`
`608
`
`612
`
`614
`
`IPR2020-00033 Page 00007
`
`IPR2020-00033 Page 00007
`
`

`

`6,034,621
`
`1
`WIRELESS REMOTE SYNCHRONIZATION
`OF DATA BETWEEN PC AND PDA
`
`BACKGROUND OF THE INVENTION
`
`1. Field of the Invention
`
`This invention relates to the management of scheduling
`and other information between two isolated electronic com-
`
`puters. More particularly, it relates to simplified, discrete and
`automated synchronization of calendar and contact-related
`data between a personal computer (PC) and a remote per-
`sonal digital assistant (PDA).
`2. Background of Related Art
`Personal computers (PCs) are well known and extremely
`popular. Personal digital assistants (PDAs) and other hand-
`held devices, while perhaps being less well known than PCs,
`are nevertheless very popular, particularly among business
`persons. APDA is a small, handheld computer used to write
`notes, record names, addresses and phone numbers,
`to
`develop an appointment calendar, and otherwise keep your
`life in order. A scheduling program running separately in
`each of the PC and the PDA maintains separate database
`information in data files relating to scheduled appointments
`and contact information.
`
`Scheduling programs running on a PDA or a PC are very
`convenient for scheduling, for managing appointments, and
`for storing and organizing personal
`information, contact
`information, and group scheduler information electronically.
`However, for any particular user,
`it is most desirable to
`maintain only one set of personal, contact and group sched-
`uler data for each person or group of persons utilizing a
`scheduling program running on a PC or on a PDA.
`Information relating to a scheduler program includes
`personal information, contact information, and group sched-
`uler information. Contact
`information includes names,
`addresses and phone numbers. Group scheduler information
`includes appointment information, and the date, time and
`name of the person for which the appointment was made.
`Conventional PC and PDA devices provide the ability to
`synchronize data between a data file maintained by the
`scheduling program running on a PC and a data file main-
`tained by the scheduling program running on a PDA. FIGS.
`5 to 7 show conventional systems using fixed, dedicated
`connections to synchronize data files maintained by corre-
`sponding scheduling programs running separately on a PC
`and on a PDA.
`
`FIG. 5 shows a PC 600 including a scheduling program
`606 which creates and maintains a data file 608 relating to
`a user’s or group of users’ appointments, contacts, etc.
`Commercially available scheduling programs include
`MICROSOFT Schedule+TM, which is part of the WIN-
`DOWS 95 OFFICETM, MICROSOFT OutlookTM, which is
`part of
`the WINDOWS 97 OFFICETM, LOTUS
`ORGANIZER, SIDEKICK, NETMANAGE, ECCO, NOW
`UP-TO-DATE and DAY-TIMER ORGANIZER. APDA 602
`
`includes a corresponding version of the same scheduler
`program (e.g. Schedule+ or Outlook) with a corresponding
`data file 614 relating to the user of the PDA’s appointments,
`contacts, etc. In the given example, the data file 608 on the
`PC 600 contains information relating to a same user or group
`of users as the data file 614 on the PDA 602.
`
`The conventional PDA 602 synchronizes its data file 614
`with the data file 608 of the PC 600 on demand only, and
`only through a fixed, dedicated connection established
`between the PC 600 and the PDA 602. In the example of
`FIG. 5, a direct serial link 616 is established between the
`
`2
`serial port 604 of the PC 600 and the serial port 610 of the
`PDA 602. Using this direct, point-to-point serial link 616, a
`synchronization routine started on either the PC 600 or the
`PDA 602 initiates a synchronization of data contained in
`data files 608, 614 relating to the relevant user or users.
`FIG. 6 shows a conventional synchronization connection
`requiring a fixed, dedicated, point-to-point connection
`between a PC 600 and a PDA 602 through the public
`switched telephone network (PSTN) 724. The PC 600
`includes a connection to a modem 720. The modem 720 is
`
`connected to the PSTN 724. Similarly, the PDA 602 includes
`a modem accessory 722 which in turn is connected to the
`PSTN 724. Thus, the PSTN 724 provides a fixed, dedicated,
`point-to-point communication path between the PC 600 and
`the PDA 602 to allow synchronization of the data files 608,
`614.
`
`FIG. 7 shows a conventional, fixed, point-to-point infra-
`red serial data link used to form a dedicated link between the
`
`PC 600 and the PDA 602 to allow synchronization of data
`files 608, 614. Infrared links typically require line-of-sight
`placement between the PC 600 and PDA 602 to allow the
`infrared signal to pass directly between the PC 600 and the
`PDA 602.
`
`Using conventional methods to link the PC 600 with the
`PDA 602 to synchronize a users’ scheduling data files 608,
`614 requires the establishment of a fixed, point-to-point,
`dedicated link. These fixed, dedicated links require physical
`placement of the PDA 602 to be within the proximity of the
`PC 600 (with respect to the direct serial link shown in FIG.
`5 or the infrared link shown in FIG. 7), or movement of the
`PDA 602 to a telephone jack where a cable can be inserted
`between a modem 722 connected to the PDA 602 and the
`
`10
`
`15
`
`20
`
`25
`
`30
`
`35
`
`PSTN 724 (as shown in FIG. 6). In any event, synchroni-
`zation of a user’s data files 608, 614 requires a fixed,
`dedicated connection between the PDA 602 and the PC 600
`
`for a period of time, which tends to discourage frequent
`synchronization of data files 608, 614. This is particularly
`the case when, e.g., the PDA 602 is carried in the pocket of
`a traveling user who is away from the office containing the
`PC 600, or a user who carries the PDA 602 into an isolated
`meeting.
`The conventional links between the PC 600 and the PDA
`
`602 are also required to be point-to-point connections
`between the PC 600 and the PDA 602 for synchronization of
`relevant user data files 608, 614.
`Thus,
`there is a need to simplify and automate the
`synchronization of a user’s data files 608, 614 as between
`the scheduling program 606 of the PC 600 and the sched-
`uling program 612 of a PDA 602. Moreover, a more efficient
`utilization of communication media other than that com-
`mensurate with the use of a fixed, dedicated link between the
`PC 600 and the PDA 602 is also desired.
`
`There is also a need to provide for the simultaneous
`synchronization of more than just two separate computers
`containing a user’s or group of user’s data files.
`SUMMARY OF THE INVENTION
`
`invention provides a portable computer
`The present
`including a Personal Digital Assistant (PDA) and a paging
`receiver. The personal digital assistant includes a scheduling
`program, a data file maintained by the scheduling program,
`and a synchronization routine for synchronizing the data file
`with one or more remote data files.
`
`In another embodiment the present invention provides a
`method of utilizing a paging network to synchronize data
`files of a PDA with data files of a personal computer (PC).
`
`40
`
`45
`
`50
`
`55
`
`60
`
`65
`
`IPR2020-00033 Page 00008
`
`IPR2020-00033 Page 00008
`
`

`

`6,034,621
`
`3
`Any change to a data file on the PC or PDA is monitored. As
`a result of a change to the data file, a synchronization routine
`is initiated to prepare a synchronization information data
`packet, which is transmitted to the other of the PC and PDA
`over a network, e.g., a one-way or two-way paging network.
`
`BRIEF DESCRIPTION OF THE DRAWINGS
`
`Features and advantages of the present invention will
`become apparent to those skilled in the art from the follow-
`ing description with reference to the drawings, in which:
`FIG. 1 shows a first embodiment of the present invention
`utilizing a two-way paging network to synchronize data
`between a PC and a wireless PDA.
`
`FIG. 2 shows a second embodiment of the present inven-
`tion utilizing a one-way paging network to synchronize data
`from a PC to a wireless PDA.
`
`5
`
`10
`
`15
`
`FIG. 3 shows a third embodiment of the present invention
`utilizing a CDPD network to synchronize data between a PC
`and a wireless remote PDA.
`
`20
`
`FIG. 4 shows a fourth embodiment of the present inven-
`tion utilizing the PSTN and a CDPD network to synchronize
`data between a PC and a wireless remote PDA.
`
`FIG. 5 shows conventional apparatus for synchronizing
`scheduling data files between a PC and a PDA through a
`direct serial link.
`
`FIG. 6 shows conventional apparatus for synchronizing
`scheduling data files between a PC and a PDA through
`modems and the PSTN.
`
`FIG. 7 shows conventional apparatus for synchronizing
`scheduling data files between a PC and a PDA through an
`infrared serial data link.
`
`DETAILED DESCRIPTION OF ILLUSTRATIVE
`EMBODIMENTS
`
`The present invention utilizes wireless networks in gen-
`eral to accomplish synchronization between a PC and a PDA
`type device. Suitable wireless networks include a paging
`network, a CDPD network, a satellite network, and a net-
`work utilizing the cordless telephone interface standards,
`e.g., the 900 MHz band in the United States.
`FIG. 1 shows a first embodiment of the present invention
`utilizing a two-way paging network 152 to accomplish
`automatic synchronization of data in a data file 608 of a PC
`600 with data in data file 614 of a PDA 602.
`
`The PC 600 system includes a conventional scheduling
`program 606 and a data file or files 608. The PC 600 is
`connected to a modem 150, which in turn establishes a
`connection with a two-way paging network 152 through the
`PSTN 724.
`
`Each wireless remote PDA system 100 includes a PDA
`602 for operating a conventional scheduling program 612
`corresponding to the scheduling program 606 on the PC 600
`system, and a data file or files 614. Additionally, the wireless
`remote PDA system 100 includes a connection to a two-way
`pager 154 over which data is passed. The connection may be
`over a serial port in the PDA 602 to a serial port of the
`two-way pager 154. Alternatively, if the PDA 602 includes
`a Personal Computer Memory Card International Associa-
`tion (PCMCIA) type port, a parallel connection may be
`established between a parallel bus of the two-way pager 154
`and the PCMCIA port of the PDA 602.
`Two-way paging typically adds a response channel to a
`traditional one-way paging system. A user can respond to a
`paging message containing synchronization information in a
`
`25
`
`30
`
`35
`
`40
`
`45
`
`50
`
`55
`
`60
`
`65
`
`4
`two-way paging network either using a selection of pre-
`programmed responses or by formatting a free-form text
`reply.
`Any conventional two-way paging network may be uti-
`lized by this embodiment, including those operating under
`the ReFLEXTM two-way paging open protocol established
`by MOTOROLA. The ReFLEXTM protocol adds a 12.5 KHz
`response channel to a traditional one-way paging system.
`ReFLEXTM protocols work on either 25 KHz or 50 KHz
`channels in, e.g., the 929—932 and 940—941 MHz frequency
`band. The ReFLEXTM protocol
`is currently capable of
`handling an inbound data rate on a 12.5 KHz channel, e.g.,
`in the 896 to 902 MHz frequency band, at 800, 1600, 6400
`or 9600 bits per second (bps), and at an outbound, response
`data rate of 1600, 3200 or 6400 bps per 25 KHz channel.
`Encryption may be implemented if desired in the two-way
`paging protocol to ensure privacy.
`The two-way paging network 152 may include use of the
`Internet for transmission of data to and from the PC 600. In
`
`this instance, the PC 600 would gain access to the Internet
`by any of a multitude of conventional means, including a
`modem with dial-up access to an Internet Service Provider
`(ISP).
`An appropriate synchronizing routine 101 is included on
`the PC 600 for synchronization of the data files 608, 614. A
`corresponding synchronizing routine 103 is included on the
`PDA 602. In operation, either synchronizing routine 101,
`103 can initiate operation of the other through communica-
`tion over the two-way paging network and pager 152, 154.
`In a preferred embodiment, synchronization between the
`data files 608, 614 takes place after each update or change
`to either data file 608, 614. For instance, most scheduling or
`contact programs 606, 612 update the respective data files
`608, 614 upon exiting a data base cell. Thus, as a data base
`cell is changed in either data file 608, 614, the same changes
`are mirrored to the other data file 608, 614 over the two-way
`paging network. This ‘incremental’ synchronization mini-
`mizes the amount of data transfer necessary between data
`files 608, 614 at any one time. To minimize modem activity,
`this automatic synchronization may take place after n
`changes to either data file 608, 614, after m minutes of
`activity, and/or upon exiting from the scheduling program
`606 or 612.
`
`Alternatively, larger amounts of data in the data files 608,
`614 can be synchronized using an “on-demand” selection
`using the two-way paging network. In this way, the PC 600
`and PDA 602 can operate independently of one another and
`synchronize data files 608, 614 only upon the push of a
`‘synchronize’ button or other operator selection similar to
`the conventional ‘hot synchronize’ button on current PDAs
`602 such as the PILOTTM available from US ROBOTICS.
`
`Using the two-way paging network and pager 152, 154, even
`an ‘on-demand’ synchronization provides conveniences not
`found in conventional PC/PDA systems. For instance, as
`long as the wireless remote PDA system 100 is within the
`range of the two-way paging network 152, the PDA 602 can
`initiate the synchronization routine 103 and synchronize the
`data file 608, 614 at any time without the need to hook-up
`to a telephone jack or to co-locate the PDA 602 with the PC
`600.
`
`The synchronization routines of the present invention are
`as known in the prior art but modified as described herein.
`One prior art synchronization routine is INTELLISYNCTM
`from PUMA TECHNOLOGY which works with a HotSync
`Manager of the PILOT PDA. When synchronization is
`performed and conflicts arise because of a change made to
`
`IPR2020-00033 Page 00009
`
`IPR2020-00033 Page 00009
`
`

`

`6,034,621
`
`5
`the same record both on the PDA 602 and on the PC 600, the
`conflict
`is either automatically resolved as in prior art
`synchronization routines, or a user is given a choice as to
`how to resolve the conflict. Moreover, the synchronization
`routines of the present invention allow the particular appli-
`cations and individual fields for which synchronization is to
`be accomplished as in the prior art systems such as INTEL-
`LISYNCTM.
`
`The present embodiment is not limited to a point-to-point
`interconnection between a PC 600 and a PDA 602. Multiple
`wireless remote PDA systems 100 and PCs 600 may be
`synchronized substantially simultaneously via the two-way
`paging network 152. For instance, the initiating PC 600 can
`be assigned to operate in a Master mode, while all remote
`PDA systems 100 can be assigned to operate in a slave
`mode.
`
`Thus, an important feature of this and other embodiments
`is the utilization of packetized data to provide efficient
`utilization of a communication path, rather than wasting
`unused bandwidth of a fixed, dedicated communication path
`as in the prior art.
`Another important feature is that this and other embodi-
`ments are not necessarily tied to a point-to-point connection,
`i.e., they may be implemented to synchronize data files 614
`of a plurality of wireless remote PDA systems 100 in a
`point-to-multipoint configuration with the data file 608 of a
`PC 600.
`
`Perhaps most importantly the present invention provides
`an additional level of freedom of movement to the wireless
`
`remote PDA system 100 such that it can be synchronized
`from any location, at any time, without the need to plug the
`PDA 602 into the PSTN or to co-locate the PDA 602 with
`
`the PC 600 as in the prior art. It also allows for discrete
`synchronization of data files 608, 614 without the knowl-
`edge of others in the room with the user, or even the user, of
`the PDA 602. For example, in a long meeting, the user of the
`PDA 602 does not have to excuse him or herself to plug the
`PDA 602 into the telephone system and press an “on-
`demand” selection switch or other means to get updated,
`synchronized information about changed or added appoint-
`ments.
`
`FIG. 2 shows another embodiment of the present inven-
`tion utilizing a one-way paging system to synchronize one
`data file, e.g., the PC 600 data file 608, with another data file,
`e.g., the data file 614 of the wireless remote PDA system
`200.
`
`Conventional one-way paging systems are well known.
`For instance, one-way paging systems utilizing MOTORO-
`LA’s FLEXTM protocol are known. The FLEXTM protocol
`currently operates at three different speeds, 1600, 3200 and
`6400 bps. Other conventional protocols which are suitable
`for one-way paging are Post Office Code Standardization
`Advisory Group (POCSAG) and GOLAY.
`The FLEXTM high speed paging protocol is a fully syn-
`chronous paging code which keeps the paging receiver’s 354
`data-reception electronics continuously in synchronism with
`the paging transmission even when there is no incoming
`message from the broadcasting station of the one-way
`paging network 352. FLEXTM energizes the pager electron-
`ics only when data is to be received in real time. This
`significantly reduces pager power consumption. Of course,
`one-way paging systems which energize the pager receiver
`354 asynchronously with the incoming radio frequency (RF)
`signal would be suitable for the present embodiment as well.
`FLEXTM can be used on a dedicated channel, but can be
`mixed with paging messages using other protocols such as
`POCSAG and GOLAY.
`
`10
`
`15
`
`20
`
`25
`
`30
`
`35
`
`40
`
`45
`
`50
`
`55
`
`60
`
`65
`
`6
`In the one-way paging system shown in FIG. 2 the PC 600
`passes synchronization information to a one-way paging
`network 352 via the modem 150 and PSTN 724. Serial or
`
`parallel data output from a pager receiver 354 contains
`synchronization information received from the synchroniz-
`ing routine 201 of the PC 600. This synchronization infor-
`mation received by the pager receiver 354 interacts with the
`synchronizing routine 203 and data file 614 of the PDA 602
`so as to update the PDA’s data file 614 in accordance with
`changes made to the PC’s data file 608.
`Some level of reliability from data corruption can be
`afforded in a one-way paging system by the inclusion of a
`simple error checksum or cyclic redundancy check (CRC)
`bit or other method used in conventional one-way paging
`systems. For instance, FLEXTM provides for data integrity
`and user confidence by providing prudent error protection
`against multi-path fading errors caused by simulcasting.
`FLEXTM has positive end-of message control which is used
`to avoid receipt by the pager receiver 354 of truncated
`messages. Optionally, the missed-message flag indicator is
`passed from the pager receiver 354 to prompt the user to call
`the administrator or other user operating the PC 600, for any
`missed updates via standard telephone, or
`to have the
`updates re-transmitted. The missed-message flag appears if
`a paging message containing synchronization information is
`missed while the PDA 602 is outside the coverage area of the
`one-way paging network 352.
`The synchronizing information passed by the two-way
`and one-way paging systems may be, e.g., ASCII or unfor-
`matted binary data streams, in any mix and in unlimited
`lengths according to the FLEXTM and REFLEXTM protocols.
`Extra-long messages are automatically segmented into pack-
`ets up to 220 bytes by the paging network.
`For point-to-multipoint synchronization, the FLEXTM and
`REFLEXTM protocols offer a GROUP CALL function which
`delivers common synchronization information to a distribu-
`tion list of PDAs.
`
`The two-way paging system embodiment shown in FIG.
`1 is generally preferred over the one-way paging system
`embodiment shown in FIG. 2 because of the ability of
`two-way paging to provide acknowledgments in a return
`direction. Nevertheless, if lowered reliability in the data file
`614 of the PDA 602 is acceptable,
`then the benefits of
`automatic synchronization between data files 608, 614 may
`be accomplished using a one-way paging network 352 as
`shown in FIG. 2.
`
`To improve reliability in the one-way paging network
`352, after a day, a week, etc. of synchronizing data files 608,
`614 via the one-way paging network 352, it may be desirable
`to occasionally correct any data errors which may have
`occurred during any one of a series of one-way paging
`network 352 synchronizations by using the direct connection
`approach as in the prior art.
`FIGS. 3 and 4 show embodiments of the present invention
`utilizing a Cellular Digital Packet Data (CDPD) system.
`CDPD is a wireless standard providing two-way, 19.2 Kbps
`packet data transmission over existing cellular telephone
`channels. CDPD and cellular telephones are very well
`known in the art. FIG. 3 implements the PDA 602 as a
`roaming remote device, and FIG. 4 implements both the PC
`600 and the PDA 602 as roaming remote devices.
`In FIG. 3, the PC 600 system and wireless remote PDA
`system 300 contain scheduling programs 606, 612 and data
`608, 614 as in the prior art. However, the PC 600 establishes
`a connection with a remote CDPD transceiver 460 to imple-
`ment a two-way synchronization of data files 608, 614 under
`
`IPR2020-00033 Page 00010
`
`IPR2020-00033 Page 00010
`
`

`

`6,034,621
`
`7
`the control of synchronization routine 301. The PDA 602
`may initiate the establishment of the connection with the PC
`600, and the synchronization routine 303 may control syn-
`chronization of data files 608, 614.
`The CDPD transceiver 460 establishes a wireless connec-
`tion with a CDPD base station 464, which in turn routes the
`synchronization data from data file 608 through the PSTN
`724 to another CDPD base station 465 if necessary before
`re-transmission to remote CDPD transceiver 462. The
`remote CDPD transceiver 462 communicates with the PDA
`602 via a serial port (e.g. via a 15-pin serial port connector)
`or via a PCMCIA port if PDA 602 is so equipped.
`Either synchronization routine 301, 303 can initiate the
`synchronization of data files 608, 614. CDPD provides a
`two-way, relatively high bandwidth channel for fast syn-
`chronization of the data files 608, 614.
`FIG. 4 shows a CDPD implementation of the present
`invention with the PC 600 utilizing a direct connection to the
`CDPD base station 465 via a modem 150 with a dial-up
`connection to the PSTN 724. The wireless remote PDA
`system 300 is as described above with respect to FIG. 3.
`While the invention has been described with reference to
`the exemplary preferred embodiments thereof, those skilled
`in the art will be able to make various modifications to the
`described embodiments of the invention without departing
`from the true spirit and scope of the invention.
`I claim:
`
`1. A portable computing device comprising:
`a personal digital assistant including:
`a scheduling program,
`a first data file maintained by said scheduling program,
`and
`
`a synchronization routine; and
`a pager in two-way communication with said personal
`digital assistant;
`said synchronization routine being arranged to transmit a
`synchronization information data packet
`including
`information regarding at least one change made to said
`first data file, via said pager to a remotely located
`separate computing device having an associated second
`data file; and
`said synchronization information data packet being uti-
`lizable by said remotely located separate computing
`device in order to synchronize data of said second data
`file to data of said first data file.
`2. The portable computing device according to claim 1,
`wherein:
`
`said synchronization of said data of said second data file
`to said data of said first data file is accomplished
`automatically.
`3. The portable computing device according to claim 1,
`wherein:
`
`said synchronization accomplishes synchronization of
`data of a plurality of data files associated with a
`plurality of remotely located separate computing
`devices to said data of said first data file.
`4. A portable computing device comprising:
`a personal digital assistant including:
`a scheduling programs
`a data file maintained by said scheduling program, and
`a synchronization routine; and
`a Cellular Digital Packet Data transceiver in two-way
`communication with said personal digital assistant;
`said synchronization routine being arranged to transmit a
`synchronization information data packet
`including
`information regarding at least one change made to said
`first data file, via said Cellular Digital Packet Data
`transceiver to a remotely located separate computing
`device having an associated second data file; and
`
`10
`
`15
`
`20
`
`25
`
`30
`
`35
`
`40
`
`45
`
`50
`
`55
`
`60
`
`65
`
`8
`said synchronization Information data packet being uti-
`lizable by said remotely located separate computing
`device in order to synchronize data of said second data
`file to data of said first data file.
`5. The portable computing device according to claim 4,
`wherein:
`
`said synchronization of said data of said second data file
`to said data of said first data file is accomplished
`automatically.
`6. The portable computing device according to claim 4,
`wherein:
`
`said synchronization accomplishes synchronization of
`data of a plurality of data files associated with a
`plurality of remotely located separate computing
`devices to said data of said first data file.
`7. A method of utilizing a wireless telephonic network to
`synchronize a data file of a PDA in two-way communication
`with said wireless telephonic network with a data file of a
`PC, comprising:
`monitoring a change to said data file of said PC;
`after detection of said change to said data file of said PC,
`triggering a synchronization routine associated with
`said PC to assemble a synchronization information data
`packet including information regarding said detected
`change; and
`transmitting said synchronization information data packet
`to said PDA over said wireless telephonic network, said
`synchronization information data packet being receiv-
`able by said PDA over said wireless telephonic network
`to synchronize said data file of said PDA with said data
`file of said PC.
`8. The method according to claim 7, wherein said wireless
`telephonic network comprises:
`a paging network.
`9. The method according to claim 7, wherein said wireless
`telephonic network comprises:
`a cordless telephone network.
`10. The method according to claim 7, wherein:
`said step of monitoring said change, said step of triggering
`said synchronization routine, and said step of transmit-
`ting said synchronization information data packet are
`all performed automatically without user intervention.
`11. The method according to claim 10, wherein:
`said automatically performed steps are performed after
`each change is stored in said data file of said PC.
`12. The method according to claim 10, wherein:
`said automatically performed steps are performed after a
`plurality of changes are stored in said data file of said
`PC.
`13. The method according to claim 10, wherein:
`said automatically performed steps are performed at a
`predetermined time interval.
`14. The method according to claim 10, wherein:
`said automatically performed steps are performed
`on-demand.
`15. The method according to claim 7, further comprising:
`accessing said wireless telephonic network via a Public
`Switched Telephone Network.
`16. The method according to claim 7, further comprising:
`accessing said wireless telephonic network via the Inter-
`net.
`
`17. Amethod of utilizing a wireless telephonic network to
`synchronize a data file of a PC with a data file of a PDA in
`two-way communication with said wireless telephonic
`network, comprising:
`monitoring a change to said data file of said PDA;
`after detection of said change to said data file of said PDA,
`triggering a synchronization routine associated with
`
`IPR2020-00033 Page 00011
`
`IPR2020-00033 Page 00011
`
`

`

`6,034,621
`
`9
`said PDA to assemble a synchronization information
`data packet
`including information regarding said
`detected change; and
`transmitting said synchronization information data packet
`to said PC over said wireless telephonic network, said
`synchronization information data packet being adapted
`receivable by said PC over said wireless telephonic
`network to synchronize said data file of said PC with
`said data file of said PDA.
`18. The method according to claim 17, wherein said
`wireless telephonic network comprises:
`a paging network.
`19. The method according to claim 17, wherein said
`wireless telephonic network comprises:
`a cordless telephone network.
`20. The method according to claim 17, wherein:
`said step of monitoring said change, said step of triggering
`said synchronization routine, and said step of transmit-
`ting said synchronization information data packet are
`all performed automatically without user intervention.
`21. Amethod of utilizing a wireless telephonic network to
`synchronize a data file of a PDA in two-way communication
`with said wireless telephonic network with a data file of a
`PC, comprising:
`triggering a synchronization routine associated with said
`PC to assemble a synchronization information data
`packet
`including information regarding a detected
`change; and
`transmitting said synchronization information data packet
`to said PDA over said wireless telephonic network, said
`synchronization information data packet being receiv-
`able by said PDA over said wireless telephonic network
`to synchronize said data file of said PDA with said data
`file of said PC.
`22. The method utilizing a wireless telephonic network
`according to claim 21, wherein said wireless telephonic
`network comprises:
`a paging network.
`23. The method utilizing a wireless telephonic network
`according to claim 22, wherein:
`said paging network is a one-way paging network.
`24. The method utilizing a wireless telephonic network
`according to claim 22, wherein:
`said paging network is a two-way paging network.
`25. The method utilizing a wireless telephonic network
`according to claim 22, further comprising:
`accessing said paging network via a Public Switched
`Telephone Network.
`26. The method utilizing a wireless telephonic network
`according to claim 22, further comprising:
`accessing said paging network via an Internet.
`27. The method utilizing a wireless telephonic network
`according to claim 21, wherein said wireless telephonic
`network comprises:
`a cellular telephone network.
`28. The method utilizing a wireless telephonic network
`according to claim 21, wherein:
`said step of triggering said synchronization routine and
`said step of transmitting said data synchronization
`information data packet are performed automatically.
`29. The method utilizing a wireless telephonic network
`according to claim 28, wherein:
`said automatically performed steps are performed after
`each change is stored in said data file of said PC.
`30. The method utilizing a wireless telephonic network
`according to claim 28, wherein:
`said automatically performed steps are performed after a
`plurality of changes are stored in said data file of said
`PC.
`
`10
`
`15
`
`20
`
`25
`
`30
`
`35
`
`40
`
`45
`
`50
`
`55
`
`60
`
`65
`
`10
`31. The method utilizing a wireless telephonic network
`according to claim 28, wherein:
`said automatically performed steps are performed at a
`predetermined time interval.
`32. The method according utilizing a wireless telephonic
`network to claim 28, wherein: