Unlted States Patent
`[19]
`[11] Patent Number:
`6,112,099
`
`Ketola
`[45] Date of Patent:
`*Aug. 29, 2000
`
`USOO6112099A
`
`[54] TERMINAL DEVICE FOR USING
`TELECOMMUNICATION SERVICES
`
`[75]
`
`Inventor: Pekka Ketola, Tampere, Finland
`
`[73] Assignee: Nokia Mobile Phones, Ltd., Espoo,
`Finland
`
`5,371,734 12/1994 Fischer ............................... 340/825.47
`5,404,392
`4/1995 Miller et al.
`............................ 455/466
`..
`5,422,656
`6/1995 Allard et a1.
`345/173
`
`
`455/557
`4/1996 Berland ........
`455/466
`5/1997 Strauch et al.
`
`5/1999 Raith ....................................... 455/422
`
`5,509,050
`5,627,878
`5,907,555
`
`FOREIGN PATENT DOCUMENTS
`
`[*] Notice:
`
`This patent issued on a continued pros-
`ecution application filed under 37 CFR
`1.53(d), and is subject to the twenty year
`patent
`term provisions of 35 U.S.C.
`154(a)(2).
`
`0 605 349 A2
`0 666 681 A2
`0 695 075 A1
`WO 93/07684
`WO 94/12938
`
`7/1994 European Pat. Off.
`8/1995 European Pat. Off.
`1/1996 European Pat. Off.
`4/1993 WIPO .
`6/1994 WIPO .
`
`.
`.
`.
`
`[21] Appl. No.: 08/787,864
`
`[22]
`
`Filed:
`
`Jan. 23, 1997
`
`Primary Examiner—Dwayne D. Bost
`Assistant Examiner—Jean A Gelin
`
`Attorney, Agent, or Firm—Perman & Green, LLP
`
`[30]
`
`Foreign Application Priority Data
`
`[57]
`
`ABSTRACT
`
`Feb. 26, 1996
`
`[F1]
`
`Finland .................................... 960894
`
`Int. Cl.7 ....................................................... H04Q 7/20
`[51]
`[52] US. Cl.
`........................... 455/466; 370/252; 370/338
`[58] Field of Search ..................................... 455/524, 556,
`455/566, 466, 67.1, 38.3, 517, 551, 557,
`574, 403; 379/9318, 89; 370/218, 299,
`912, 913, 338, 349, 428, 252
`
`[56]
`
`References Cited
`U.S. PATENT DOCUMENTS
`
`4,527,267
`4,759,014
`4,837,800
`4,914,650
`5,146,454
`5,220,501
`
`7/1985 Cohen ..................................... 370/428
`7/1988 Decker et al. ........... 370/503
`
`....................... 455/557
`6/1989 Freeburg et al.
`4/1990 Sriram ..................................... 370/528
`
`9/1992 Courtois et al.
`...... 370/252
`6/1993 Lawlor et al.
`............................ 380/24
`
`The terminal device according to the invention provides
`means for connecting said terminal device with telecommu-
`nication network for utilizing data based services and means
`for offering information processing services, such as display
`(15) and means for data input (15, 16, 17). The user utilizes
`data processing services, e.g. WWW browser prior known
`from Internet, without a mouse or any corresponding point-
`ing device. In the terminal device according to the invention
`the data connection with the telecommunication network is
`closed in order to save current and cost, when data transfer
`is not needed. The closing of the data connection is opti-
`mized between service speed and current saving. In the
`terminal device according to the invention the user interface
`and the use of WW services are functionally divided into
`several logical levels.
`
`13 Claims, 9 Drawing Sheets
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`91
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`14
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`Radio
`section
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`Aug. 29,2000
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`Sheet 1 0f9
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`Figure 1
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`92
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`k
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`Figure 3
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`Sheet 4 0f9
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`Document
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`Figure 4
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`31
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`33
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`17
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`16
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`‘
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`WWW
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`Generaiinformation
`Daily ne w:
`Weather forecast
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`____ m L,_
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`hn minimum. no lua. com!
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`34
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`Figure 5
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`Formuh 1
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`Nokla Main Directory
`G mag! ifionn atign
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`Nokia Main Directory
`mm
`mm
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`W33 _
`flnmzallnfmutm
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`Aug. 29,2000
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`Sheet 5 0f9
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`1 7
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`1 7
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`Nokia Telecommunications
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`Figure 7
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`Sheet 6 0f9
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`30
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`60
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`Contact level
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`Fetch contact data
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`33
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`17A 17B
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`17C
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`17D
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`Edit contact User
`list
`settin-s
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`68
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`open?
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`Yes
`Close
`data
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`N°
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`Close
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`Quit
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`es
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`64
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`No
`Open data
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`62
`Fetch cache
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`Fetch WWW
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`Display
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`GoTo document level
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`Figure 8
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`Document level
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`40
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`17A 17B
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`33
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`17C
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`17D
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`64
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`GoTo Contact level
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`I Opendata
`Fetchcache
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` 63
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`Display
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`No
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`Fetch WWW
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`66
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`fl
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`/ 80
`GoTo Navigation level
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`Figure 9
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`Sheet 8 0f9
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`Navigation level
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`Figure 10
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`Radio
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`section
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`Figure 11
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`1
`TERMINAL DEVICE FOR USING
`TELECOMMUNICATION SERVICES
`
`FIELD OF THE INVENTION
`
`The present invention relates to a terminal device for
`connection with telecommunication network, by means of
`which the user utilizes telecommunication services and
`which terminal device disconnects the connection to the
`
`telecommunication network when a certain predetermined
`criterion is met.
`
`10
`
`BACKGROUND OF THE INVENTION
`
`In the modern information society people are more and
`more dependent on telecommunication networks and the
`services offered by them. Utilizing telecommunication net-
`works has been experienced to be so important that people
`no more want to be dependent on the bonds of traditional
`wired network. That is why a great number of people already
`have wireless mobile stations, e.g. GSM mobile phones
`which are mainly used for normal speech communication.
`To a more increasing extent people have become depen-
`dent on also other telecommunication services available,
`such as telefax, electronic mail, Internet and other informa-
`tion transfer services. An important service is the WWW
`pages offered by Internet, and the versatile services utilized
`through them. When one is used to these services in the
`traditional office environment, they are difficult to give up
`for example when leaving for a business trip.
`In order to be able to manage easily, when on the road, for
`example, one’s time and meetings, so called electronic
`notebooks have been developed. They are generally called
`PDA (Personal Digital Assistant) devices. These devices are
`also called PCD (Personal Communication Device) and PIC
`(Personal Intelligent Communicator). These devices are
`typically of the size of a largish pocket calculator and often
`equipped with a touch display. The user can with a plastic tip
`pencil, designed particularly for this purpose or even by
`touching the display with fingers, write text and figures on
`the display, from which the device interprets the information
`given. Typical services made possible by PDA devices are
`e.g. calendar and notebook services, reminding of agreed
`meetings by e.g. an acoustic signal and a phone book, from
`which information can be searched based upon a person’s or
`company’s name or other corresponding information.
`Additionally, PDA devices often also have a pocket calcu-
`lator function.
`
`When the features of a mobile station, a computer and a
`typical PDA device are integrated and packed in a very
`compact size, the result is a very versatile wireless telecom-
`munication terminal. An example of a device that has a
`touch display known from PDA devices, DOS operating
`system known from computers and a traditional mobile
`station is presented in patent publication US. Pat. No.
`5,422,656.
`Telecommunication terminals according to above are
`however, such as they are, poorly adapted for utilizing
`Internet services, and in particular for utilizing services used
`through graphic WWW pages. The display is small, only a
`limited number of keys is available and using a mouse as a
`pointer is not practical. Programs prior known from com-
`puters utilizing the Internet also draw plenty of current,
`because the data connection is kept open even if no data is
`transmitted.
`
`SUMMARY OF THE INVENTION
`
`Now a terminal device has been invented, which offers its
`user a multi-level user interface, through which, in spite of
`
`15
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`the
`the limitations set by the size of the user interface,
`terminal device is particularly suitable for effective wireless
`utilization of the Internet Services, and which terminal
`device disconnects the connection to the telecommunication
`network when it is no longer needed. In this way current
`saving is achieved and the operating time of the terminal is
`increased.
`
`In order to optimize current saving and various functions,
`in the terminal device for wireless connection to telecom-
`munication network according to the invention, the func-
`tions necessary for utilizing telecommunication services are
`preferably divided in at least two logical levels, of which
`levels each executes the tasks allocated to it as effectively as
`possible. In this context efficiency means, depending on the
`service and the various situations of use, e.g. fast operation
`of the service, easiness of use and minimizing the time for
`information transfer by radio. Remarkable savings are
`achieved in both current consumption, which is of prime
`importance for a battery operated wireless terminal device,
`and in phone bills. In order not to open the data channel
`unnecessarily, information is retrieved from memory when-
`ever it is possible.
`The terminal device according to the invention is char-
`acterized in, that it provides means for disconnecting the
`data connection to the telecommunication network when a
`predetermined criterion representing a quantity is met.
`There are several embodiments, different
`in their
`mechanical approach, for the terminal device according to
`the invention utilizing a multi-level user interface. The
`multi-level user interface is particularly suitable for mobile
`stations, in which, by enhancing the display and keyboard of
`a conventional mobile station and/or by replacing the con-
`ventional LCD display with a touch sensitive “touch screen”
`display, it is possible to provide a user interface sufficiently
`large for utilizing versatile telecommunication services. The
`above described embodiment is suitable, unless very large
`volumes of information need processing, in which case the
`small size of display and/or keyboard set their limitations.
`The terminal device according to the invention utilizing
`multi-level user interface is described in detail
`in the
`
`following, using two preferable embodiments, of which the
`first one is for its mechanical solutions clearly distinguish-
`able from conventional mobile stations. Nothing however
`prevents from using the multi-level user interface according
`to the invention in devices bearing greater resemblance with
`conventional mobile stations for
`their mechanical
`
`construction, such as illustrated by the second embodiment
`presented. Said first embodiment makes it possible to use a
`larger display and a larger keyboard without increasing the
`dimensions of the terminal device.
`
`BRIEF DESCRIPTION OF THE DRAWINGS
`
`FIG. 1 presents a first embodiment of the terminal device
`according to the invention employing a multi-level user
`interface with its cover closed (mobile telephone position),
`FIG. 2 presents a first embodiment of the terminal device
`according to the invention employing a multi-level user
`interface with its cover open (terminal device position),
`FIG. 3 presents a second embodiment of the terminal
`device according to the invention employing a multi-level
`user interface,
`FIG. 4 presents the user interface levels of a WWW
`browser employing a three-level user interface according to
`the invention and the logical dependence on each other of
`the user interface levels,
`FIG. 5 presents the first interface of a WWW browser
`employing a three-level user interface according to the
`invention, the contact level,
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`FIG. 6 presents the second interface of a WWW browser
`employing a three-level user interface according to the
`invention, the document level,
`FIG. 7 presents the third interface of a WWW browser
`employing a three-level user interface according to the
`invention, the navigation level,
`FIG. 8 presents the logical structure of the contact level
`presented in FIG. 5,
`FIG. 9 presents the logical structure of the document level
`presented in FIG. 6,
`FIG. 10 presents the logical structure of the contact level
`presented in FIG. 7, and
`FIG. 11 presents components of the terminal device,
`telecommunication network and server.
`
`DETAILED DESCRIPTION
`
`FIGS. 1 and 2 present a first embodiment of terminal
`device 1 employing a multilevel user interface according to
`the invention. In the first embodiment terminal device 1 is a
`multi service mobile station with two sections. The multi
`
`service mobile station can be used in two positions, of which
`the first one presented in FIG. 1,
`the mobile telephone
`position is optimized for using the terminal device primarily
`like a conventional mobile station. The second position,
`terminal device position presented in FIG. 2, on its behalf
`has been optimized for using the terminal device as a
`versatile telecommunication terminal. Particularly in this
`second position, the multilevel user interface according to
`the invention is utilized for using telecommunication ser-
`v1ces.
`
`Terminal device 1 according to the invention is presented
`in FIG. 1 in the mobile telephone position with cover section
`10 and base section 20 folded together and supported by
`hinge 19 (FIG. 2). In FIG. 1, the top side of cover section 10
`comprises display 11 for presentation of alphanumeric char-
`acters or graphic figures, and keyboard 12 for inputting
`alphanumeric characters in terminal device 1. When termi-
`nal device 1 is in mobile telephone position, cover section 10
`and base section 20 are locked together with latch 13. In the
`first embodiment according to the invention folding antenna
`14 is mounted in cover section 10.
`In FIG. 2 the first embodiment of terminal device 1
`
`10
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`15
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`20
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`25
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`according to the invention is presented in terminal position,
`in which cover section 10 and base section 20 are unfolded
`
`45
`
`apart from each other supported by hinge 19. In this position
`the inside of cover section 10 and the top side of base section
`20 provide the user with a user interface comprising display
`15, scroll keys 16 and function keys 17, and base section 20
`comprises application keys 21, QWERTY keys 22 prior
`known from typewriters and computers, and arrow keys 23.
`If needed, displays 11, 15 can be provided with “touch
`screens” enabling also inputting information in terminal
`device 1 using a specific pencil or by touching with fingers.
`FIG. 3 presents a second embodiment of terminal device
`1 employing the multi-level user interface according to the
`invention. The user interface of terminal device 1 equally
`comprises display 15, scroll keys 16 and function keys 17.
`Also a folding antenna is shown in FIG. 3. In this second
`embodiment the user interface as a whole is much simpler
`than in the first embodiment, but as to its functions the multi
`level user interface according to the invention is used like in
`the first embodiment. In the following the multi level user
`interface is described using as an example mainly the first
`embodiment described in FIGS. 1 and 2.
`
`Terminal device 1 utilizing the multi level user interface
`according to the invention offers, in addition to speech and
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`data services prior known from conventional mobile
`stations, several additional functions, such as e.g. sending
`and receiving telefax and electronic mail messages, a pos-
`sibility to contact Internet, to use terminal device 1 as an
`electronic notebook or even utilizing special services pro-
`vided by telecommunication network, such as call forward-
`ing or group call services. Through WWW (World Wide
`Web) pages known from Internet environment, using also
`new, still developing services, e.g. weather and betting
`services is easily accomplished.
`When the user wishes to activate e.g. a service employing
`WWW (World Wide Web) pages,
`this is done e.g. by
`pressing the corresponding menu key 21, after which the
`service utilizing WWW pages appears on the user interface
`display 15 (FIG. 2). The WWW service provides the user
`with information through display 15, and the user inputs
`information to the WWW service mainly using scroll keys
`16 and function keys 17, but, if needed, also with QWERTY
`keys 22.
`By using the multi level user interface according to the
`invention,
`it
`is possible, using only scroll keys 16 and
`function keys 17, to utilize the versatile WWW services, the
`utilization of which has typically required a considerably
`larger number of keys. In this way it is possible to utilize
`WWW services using terminal device 1 employing the
`simple user interface 15, 16, 17 described in FIG. 3. Ter-
`minal device 1 can, differently from the above described
`multi service mobile station, be designed to provide only the
`WWW service known from Internet. Terminal device 1 need
`not necessarily comprise a radio transmitter and receiver, but
`terminal device 1 can possibly be designed to be connected
`to the telecommunication network through conventional
`telephone network or even through the ISDN (Integrated
`Service Digital Network).
`Because display 15 used for e.g. browsing WWW cannot
`be very large because of the size requirements on the
`terminal device according to the invention, the same versa-
`tile possibilities are not available for the WWW browser,
`which are available when using monitors known from
`personal computers. Display 15 cannot at one time accom-
`modate all data and menus needed e.g. for selecting WWW
`links, saving documents, navigating in Internet and updating
`the scroll list comprising link address data. In a typical
`WWW browser, such as Netscape program used in Windows
`environment, all necessary information can be displayed in
`a large monitor at one time, in which case all functions
`necessary for using a service can be carried out at one time
`and on same logical level. Additionally, e.g. selecting links
`by double-clicking the mouse is possible, differently from
`terminal device 1 according to the invention,
`in which
`normally only keys and/or touch screen are available.
`In principle, it is possible in terminal device 1 according
`to the invention to use e.g. a pointer ball, prior known from
`portable computers or other corresponding pointing device,
`but this kind of equipment is bulky, expensive to realize and
`sensitive to soiling and wear. The multi-level browser of
`terminal device 1 according to the invention removes these
`problems, because using it
`the user can browse WWW
`pages, and utilizing links, surf in Internet using just scroll
`keys 16 and function keys 17. From ergonomical point of
`view it is particularly preferable that the user need not move
`his hands while using the multi-level WWW browser, but
`can execute all functions just by moving his thumbs.
`Subsequently, using the device is stable and firm, and not
`even prolonged use will tire the user. Using is also possible
`when on the move, e.g. while walking.
`In the following the multi-level user interface is described
`using the three-level WW W browser as an example. The fact
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`that the three-level WWW browser is used as an example
`does not limit using the multi-level user interface according
`to the invention for offering also other services than WWW
`services. The number of user interface levels can also be
`two, or more than three.
`In the terminal device according to the invention employ-
`ing a three level user interface the functions necessary for
`the realization of the WWW browser are in the example
`divided into three logic levels, contact level 30, document
`level 40 and navigation level 50 (FIG. 5). Each logical level
`comprises the functions most needed by the user. This aims
`at having all necessary services available using just few
`scroll keys 16 and function keys 17. When the user moves
`to an entirely new user situation, e.g. from scrolling a WWW
`page to searching for a new WWW page through Internet, he
`moves to another logical user level. Different logical user
`levels have different requirements, and accordingly by cor-
`rect design of memory 96 and the data channel, each level
`works effectively and the data channel can always be closed
`when it is not needed. The following is a detailed description
`of the different user levels.
`Contact level 30 is the first level entered when the user
`
`activates the WWW service. Terminal device 1 displays in
`display 15 scroll
`list 31 (FIG. 5),
`in which the contact
`information saved by the user himself is displayed, e.g. the
`WWW services most used by him or otherwise most inter-
`esting. The Internet address, called URL (Uniform Resource
`Locator), is displayed in address field 32. The user selects
`the contact he wishes by scrolling the contacts using scroll
`keys 16, whereupon contact information rolls up and down
`in display scroll list 31, and address field 32 (FIG. 5) is
`updated with the corresponding new Internet address. Devi-
`ating from typical WWW browsers, the three level WWW
`browser according to the invention does not yet at this stage
`initiate a data connection to Internet server 90 (FIG. 11),
`whereupon preferably unnecessary power consumption is
`avoided, because radio transmitter and receiver 94 need not
`yet be activated. Also call charges are avoided. Said contact
`level 30 and the contact list provided by it offer the user a
`clear starting level to WWW services.
`If the user wants to fetch the WWW page of the contact
`selected with scroll keys 16 to display field 41 (FIGS. 6 and
`7), he presses function key 17A (Fetch) (FIG. 8). Alterna-
`tively the user can type any Internet address in address field
`32, or edit an Internet Address already present in address
`field 32. When function key 17A (Fetch) is pressed, proces-
`sor 95 (FIG. 11) of terminal device 1 executes program
`function block 61 to 66 in order to fetch the information
`
`from either memory 96, or utilizing Internet service 92 from
`the Internet address indicated in address field 32 (FIG. 5). If
`the required WWW page is stored in memory 96 of terminal
`device 1, data connection from terminal device 1 to base
`station server 93 preferably need not be opened and unnec-
`essary power consumption is avoided, which is very useful
`in battery powered terminal devices 1. Said function block
`61 to 66 is common to all three logical levels.
`When the user has selected the data retrieving process by
`pressing function key 17A, a routine is started for searching
`the required information. The information retrieval process
`is similar for its function in the different logical levels,
`although the designation, describing the function of the key
`to the user, may be different. For example, when moving
`from contact level 30 to document level 40, the designation
`“Fetch” (FIG. 8, 17A) describes well a situation, in which
`information is retrieved from an existing list, e.g. a contact
`list (Hotlist). Meanwhile, when moving from document
`level 40 to navigation level 50, the user moves in the logical
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`sense from terminal device 1 to Internet 92, when a more
`descriptive designation is “GoTo” (FIG. 9, 17A).
`In order to ensure the fastest possible operation of the
`WWW browser in block Cache? 61 (FIGS. 8 to 10), the
`required WWVVW page is first searched in memory 96 of
`terminal device 1. Within HTTP (HyperText Transfer
`Protocol) standard the user is reserved the possibility to
`bypass data search in memory 96, whence data search is
`started directly in item Data open? 64. Said memory 96 can
`comprise memory suited for short term data storage, e.g.
`DRAM (Dynamic Random Access Memory), or memory
`suited for long term data storage, e.g. so called flash-
`memory. It is also possible to use as memory e.g. a hard disc
`known from computers. If the requires information is found
`in said memory 96, the retrieved information is transferred
`to display field 41 (FIG. 6) using routines Fetch cache 62 and
`Display 63. If the required information is not found in
`memory 96 of terminal device 1, a contact must be taken
`with Internet 92 and further with server 90, in memory 91 of
`which the information is found. In block Data open? 64 it is
`checked whether terminal device 1 has a connection with
`base station server 93 and whether the data channel between
`base station server 93 and terminal device 1 is ready for use.
`If this is not the case, terminal device 1 calls base station
`server 93 by radio, utilizing radio block 94, and opens the
`data connection to the Internet service indicated in address
`fields 32, according to block 65. In the next stage block
`Fetch W 66 transfers the required WWW page to
`display area 41 (FIG. 6) employing routine Display 63.
`When the required WWW page has been fetched to display
`area 41, either from terminal device 1 memory 96 or from
`server 90 on contact level 30, the WWW browser goes to
`another logical level, document level 40, according to block
`Move to document level 67.
`
`If the user did not select the information fetching service
`by pressing key 17A (Fetch), he can utilize other services in
`contact level 30. Such services are editing the user’s own
`contact information,
`that is the information displayed in
`scroll list 31, according to block Edit contact list 68, by
`pressing function key 17B (Edit), and modifying user set-
`tings according to block User settings 69 by pressing func-
`tion key 17C (Settings). As the most important user settings
`can be regarded the selection of IAP (Internet Access Point),
`which IAP comprises information upon e.g. the telephone
`numbers which are called in order to contact servers 90 of
`
`Internet 92, and setting the parameters employed at estab-
`lishing a connection, e.g. Proxy-settings which make utiliz-
`ing local networks faster. Proxy-settings are used for speed-
`ing up data transfer through firewalls improving data
`security. Proxy-settings and firewall are solutions used in
`Internet 92, prior known to a person skilled in the art.
`Particularly important for the WWW browser according
`to the invention is the parameter which is employed for
`closing the data connection in a situation in which data is no
`longer transferred from Internet 92. Controlled by the ter-
`minal device processor, when a certain criterium is met,
`processor 95 closes the data connection. The user can set the
`time parameter, after which delay terminal device 1 closes
`the data connection to base station server 93, the time being
`counted from the moment when data was last transferred in
`
`the Internet connection. The countdown is executed by clock
`97. By selecting this parameter correctly significant savings
`are preferably achieved in current consumption and call cost,
`because data connection is closed automatically always
`when virtual data connection with the Internet server is not
`
`needed. This also increases the terminal device operating
`time and accordingly the terminal device need not be
`charged so often.
`
`SAMSUNG EX. 1006
`
`SAMSUNG EX. 1006
`
`

`

`6,112,099
`
`7
`The adjustment of said time parameter can also be set to
`be automatic, when it is adapted on each user level accord-
`ing to the actual user need. For example, when the user
`searches for information often, it is useful to increase the
`value of the time parameter because the time for connection
`establishing is the most time consuming process in infor-
`mation search by radio. Again,
`if the user searches for
`information relatively seldom, it is useful to decrease the
`time parameter value in order to save current. If terminal
`device 1 is provided with equipment for determining data
`transfer costs,
`the time parameter can also be weighed
`according to cost in such a way that the more expensive the
`connection is, the lower is the time parameter value. Pro-
`cessor 95 of terminal device 1 measures the quantity and
`transmission density of data packages transferred through
`the data connection, based upon which processor 95 adjusts
`the time parameter controlled by user settings. If the user
`applies adaptive time parameter setting, that is the processor
`of terminal device 1 adapts the time parameter according to
`current
`traffic situation, adjusting the time parameter is
`typically done between two limits. If the user has set it so in
`the settings, the terminal device informs the user through
`display 15 before closing the data connection, allowing the
`user to decide whether he wants to maintain the data
`connection or not. If the user does not respond to the inquiry,
`the data connection is closed in order to save current and call
`cost. The user can also utilize settings for preventing the
`closing of data connection in the middle of a service,
`whereupon utilizing Internet services becomes quicker at the
`expense of increased call cost.
`If the user wishes to quit utilizing a WWW service, he
`does it on contact level 30 by pressing function key 17D
`(Close), when, based upon the information given by block
`Data open? 70, block Close data 71 closes the data connec-
`tion with base station server 93, if it still exists. After this
`Close service 72 quits executing the three level WWW
`browser program, and according to parameters set by the
`user, block 73 (End), terminal device 1 moves to executing
`the user selected default service, or resumes the previous
`active service.
`
`From document level 40 the user can go to navigation
`level 50 by pressing function key 17A (GoTo) and proceed
`to utilizing Internet services, or continue data processing on
`document level 40. On document level 40 the user is in
`
`logical sense in terminal device 1 processing existing infor-
`mation. This information, typically a WWW page in display
`field 41, can be postedited by the user. The user can choose,
`e.g. whether he wants to store the information permanently
`in terminal device memory 96. If he does this by pressing
`function key 17B (Save), the user has in block Select mode
`81 a selection of three modes, each of which is suited for its
`own purpose. The information can be saved in the form the
`user sees it in display field 41, when information in text
`format is still available for other services, and it can for
`example be transmitted as a telefax message or by electronic
`mail. If the user wants to browse said WWW page also in the
`future,
`the text
`information must be provided HTML
`(HypeText Markup Language) markup, prior known to a
`person skilled in the art,
`in order to enable the WWW
`browser to handle the text in a correct way. A WWW page
`comprises in HTML text form certain marks, based upon
`which the WWW browser can e.g. distinguish links, head-
`lines and normal text information. The third saving alterna-
`tive is saving the link address in scroll list 31, allowing the
`user conveniently to search the address already on contact
`level 30 when he uses WWW service for next time.
`On document level 40 the user can minimize the data
`
`connection cost and disconnect
`
`the data connection by
`
`10
`
`15
`
`20
`
`25
`
`30
`
`35
`
`40
`
`45
`
`50
`
`55
`
`60
`
`65
`
`8
`
`pressing function key 17C (Data off), when the terminal
`device closes the data connection preferably already before
`the time parameter, connected with predetermined time,
`amount of information transferred in data way, or data
`package transfer density, closes the connection. It is advis-
`able to act like this at once in order to save current, if the user
`knows that he will not in a while need any new information
`from servers 90 of Internet 92. If the user no longer needs
`the services offered by document level 40, he can return to
`contact level 30 by pressing function key 17D (Close), when
`block GoTo document level 86 executes the return to contact
`level 30.
`
`On navigation level 50 the user can freely utilize the
`services offered by Internet 92 and the numerous links
`offered by it. Upon going to navigation level 50 the user
`moves in the logical sense into Internet 92, in which he can
`freely move from one service to another, search for infor-
`mation using search keys, or even utilize bank services.
`Moving between services offered by Internet is by a person
`skilled in the art called surfing. Navigation level 50 provides
`three preferable methods for searching information. It is
`either searched directly by link address, by going to the
`previous active WWW page using a Hotkey, or based upon
`a list automatically saved by the terminal device, which said
`list comprises information upon the latest Internet addresses
`visited by the user. These search criteria are selected using
`function keys 17A (Fetch), 17B (Previous) and 17C
`(History). Using function key 17D return to document level
`40 is executed according to block GoTo document level 87.
`The function of function keys 17 has been described
`above referring to t