PCT
`WORLD INI'ELLECfUAL PROPERTY ORGANIZATION
`International Bureau
`INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT)
`wo 95/23485
`
`(11) International Publication Number:
`
`(43) International Publication Date:
`
`31 August 1995 (31.08.95)
`
`(51) International Patent Classification 6 :
`H04Q 7/20
`
`Al
`
`,I.,
`I
`
`(21) International Application Number:
`
`PCT/ AU95/00098
`
`(22) International Filing Date:
`
`28 February 1995 (28.02.95)
`
`(30) Priority Data:
`PM 4143
`
`28 February 1994 (28.02.94)
`
`AU
`
`(81) Designated States: AM, AT, AU, BB, BG, BR, BY, CA, CH,
`CN, CZ, DE, DK, EE, ES, Fl, GB, GE, HU, JP, KE, KG,
`KP, KR, KZ, LK, LR, LT, LU, LV, MD, MG, MN, MW,
`MX, NL, NO, NZ, PL, PT, RO, RU, SD, SE, SG, SI, SK,
`TJ, TT, UA, UG, US, UZ, VN, European patent (AT, BE,
`CH, DE, DK, ES, FR, GB, GR, IE, IT, LU, MC, NL, PT,
`SE), OAPI patent (BF, BJ, CF, CG, CI, CM, GA, GN, ML,
`MR, NE, SN, TD, TG), ARIPO patent (KE, MW, SD, SZ,
`UG).
`
`(71) Applicant (for all designated States except US): VOXSON
`INTERNATIONAL PTY. LIMITED [AU/AU]; 231 Holt
`Street, Pinkenba, QLD 4008 (AU).
`
`(72) Inventor; and
`(75) Inventor/Applicant (for US only): LONGGINOU, Lucas
`[AU/ AU]; 55 Riverview Terrace, Hamilton, QLD 4007
`(AU).
`
`(74) Agent: MAXWELL, Peter, Francis; Peter Maxwell & Asso(cid:173)
`ciates, Blaxland House, 5 Ross Street, North Parramatta,
`NSW 2151 (AU).
`
`Published
`With international search report.
`
`(54) Title: MULTI-MODE COMMUNICATIONS SYSTEM
`
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`(57) Abstract
`
`j"
`
`1-
`
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`
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`25
`
`15
`
`• '
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`
`A multi-mode communication system including a hand-held phone module (11) and incorporating a base unit (10) allowing selection
`of multiple operational modes. The system allows a user to select from at least two different network communication protocols and standards
`(i.e. cellular, trunking, cordless, DGPS, etc.). The hand held phone module and the base unit can be a single handset. Mode selection can
`be either automatic or manual.
`
`HTC Exhibit 1004
`
`

`

`FOR THE PURPOSES OF INFORMATION ONLY
`
`Codes used to identify States party to the PCT on the front pages of pamphlets publishing international
`applications under the PCT.
`
`AT
`AU
`BB
`BE
`BF
`BG
`BJ
`BR
`BY
`CA
`CF
`CG
`CH
`CI
`CM
`CN
`cs
`cz
`DE
`DK
`ES
`FI
`FR
`GA
`
`Austria
`Australia
`Barbados
`Belgium
`Burkina Faso
`Bulgaria
`Benin
`Brazil
`Belarus
`Canada
`Central African Republic
`Congo
`Switzerland
`COte d'Ivoire
`Cameroon
`China
`Czechoslovakia
`Czech Republic
`Germany
`Denmark
`Spain
`Finland
`France
`Gabon
`
`GB
`GE
`GN
`GR
`HU
`IE
`IT
`JP
`KE
`KG
`KP
`
`KR
`KZ
`LI
`LK
`LU
`LV
`MC
`MD
`MG
`ML
`MN
`
`United Kingdom
`Georgia
`Guinea
`Greece
`Hungary
`Ireland
`Italy
`Japan
`Kenya
`Kyrgystan
`Democratic People's Republic
`of Korea
`Republic of Korea
`Kazakhstan
`Liechtenstein
`Sri Lanka
`Luxembourg
`Latvia
`Monaco
`Republic of Moldova
`Madagascar
`Mali
`Mongolia
`
`MR
`MW
`NE
`NL
`NO
`NZ
`PL
`PT
`RO
`RU
`SD
`SE
`SI
`SK
`SN
`TD
`TG
`TJ
`TT
`UA
`us
`uz
`VN
`
`Mauritania
`Malawi
`Niger
`Netherlands
`Norway
`New Zealand
`Poland
`Portugal
`Romania
`Russian Federation
`Sudan
`Sweden
`Slovenia
`Slovakia
`Senegal
`Chad
`Togo
`Tajikistan
`Trinidad and Tobago
`Ukraine
`United States of America
`Uzbekistan
`VietNam
`
`HTC Exhibit 1004
`
`

`

`wo 95/23485
`
`PCT/AU95/00098
`
`-1-
`
`MULTI-MODE COMMUNICATIONS SYSTEM
`
`FIELD OF THE INVENTION
`
`The present invention relates to multi-mode
`
`communications systems and, more particularly, to such
`
`5
`
`systems incorporating a hand held means of control.
`
`BACKGROUND ART
`
`There exists today many competing forms of
`
`communication systems ranging from cellular mobile telephones
`
`through trunking radio systems and on to more specialised
`
`10
`
`forms of network such as the DGPS network and the CTl, CT2,
`
`CT3 or DECT systems.
`
`It is an object of the present invention to provide
`
`hand held access to more than one of these systems via a
`
`single hand held unit.
`
`15
`
`DISCLOSURE OF THE INVENTION
`
`Accordingly, in one broad form of the invention, there
`
`is provided a multi-mode communications system including a
`
`hand held phone module and incorporating means allowing
`
`selection of one from a multiple of available modes of
`
`20
`
`operation.
`
`Preferably, the modes of operation comprise different
`
`forms of network communications protocols and standards.
`
`In a preferred form of the invention, the
`
`communications protocols and standards are selected from:
`
`25
`
`cellular telephone (all standards including but not
`
`limited to GSM, E-GSM, P-GSM, PCM, AMPS, ETACS,
`
`NMT450};
`
`HTC Exhibit 1004
`
`

`

`W095/23485
`
`PCT/AU95/00098
`
`-2-
`
`trunking radio system (TRS);
`
`DGPS network;
`
`cordless localised access networks including CTl, CT2,
`
`CT3 and DECT.
`
`•
`
`5
`
`Preferably said means allowing selection comprises a
`
`base unit in communication with said hand held phone module.
`
`Preferably said base unit includes a system controller
`
`adapted for communication with at least a keypad portion of
`
`said hand held phone module.
`
`10
`
`In one particular form of the invention the system
`
`controller communicates with said keypad portion via a serial
`
`interface.
`
`In an alternative preferred form said system
`
`controller communicates with said keypad via a cordless
`
`communication protocol selected from CT1/CT2/CT3 and DECT.
`
`15
`
`Preferably communications between said system
`
`controller and said keypad are at relatively low power and
`
`said base unit incorporates booster means for i'ssuing a high
`
`power communications signal.
`
`In a particular preferred form said base unit is
`
`20
`
`incorporated within said hand held phone module.
`
`In a
`
`further particular preferred form the modes of operation
`
`thereof are limited to selection between cellular phone and
`
`trunked radio.
`
`BRIEF DESCRIPTION OF THE DRAWINGS
`
`25
`
`Embodiments of the invention will now be described with
`
`reference to the accompanying drawings wherein:-
`
`Fig. 1
`
`is a block diagram of a base unit and
`
`handset according to a first embodiment of
`
`HTC Exhibit 1004
`
`

`

`wo 95/23485
`
`PCT/AU95/00098
`
`-3-
`
`the invention,
`
`Fig. 2
`
`is a diagram of the base unit and handset
`
`of Fig. 1 in a first mode of operation,
`
`Fig. 3
`
`is a diagram of the base unit and handset
`
`5
`
`of Fig. 1 according to a second mode of
`
`operation,
`
`Fig. 4
`
`is a diagram of the base unit and handset
`
`of Fig. 1 according to a third mode of
`
`operation,
`
`10
`
`Fig. 5
`
`is a diagram of the base unit and handset
`
`15
`
`20
`
`of Fig. 1 according to a fourth mode of
`
`operation,
`
`Fig. 6
`
`is a diagram of at least portions of a base
`
`unit and handset incorporated into a single
`
`casing in accordance with a second
`
`embodiment of the invention,
`
`Fig. 7
`
`is a block diagram of a base unit according
`
`to a third embodiment of the invention,
`
`Fig. 8
`
`is a block diagram of a hand set usable
`
`with any embodiment of the invention,
`
`Fig. 9
`
`is a logic diagram of the operation of the
`
`hand set of Fig. 8,
`
`Fig. 10
`
`is a block diagram of a further example of
`
`the invention,
`
`25
`
`Fig. 11
`
`is a block diagram of a further example of
`
`the invention,
`
`Fig. 12
`
`is a block diagram of a further example of
`
`the invention, and
`
`HTC Exhibit 1004
`
`

`

`W095/23485
`
`PCT/A U95/00098
`
`-4-
`
`Fig. 13
`
`is a logic diagram of an automatic
`
`switchover system.
`
`MODES FOR CARRYING OUT THE INVENTION
`
`A multi-mode communication system according to a first
`
`'
`
`5
`
`embodiment of the invention comprises a base unit 10 in
`
`communication with a handset 11.
`
`The base unit 10 includes system controller 12 in
`
`bidirectional communication with a cellular phone booster 13,
`
`a trunking radio booster 14, a trunking RF/digital MPT 1327
`
`10
`
`module 15, a cellular modem/paging module 16, a DGPS module
`
`17, CT1/CT2/CT3 interface module 18 and display 19. Aerial
`
`20 transmits/receives signals for either one of cellular
`
`phone booster 13 or trunking radio booster 14. One or other
`
`booster is switched for communication with aerial 20 by means
`
`15
`
`of electronic switch 21.
`
`In an alternative form each booster
`
`has its own dedicated aerial (not shown).
`
`It will be appreciated that the various' modules will
`
`produce signals for transmission/reception on antenna 20
`
`according to different formats and protocols and often for
`
`20
`
`transmission/reception on different carrier frequencies.
`
`It
`
`is the task of system controller 12 to switch the different
`
`modules into operation according to the needs of an operator
`
`of handset 11 as communicated from the keypad 22 of the
`
`handset 11.
`
`25
`
`The handset 11 can comprise a cellular phone handset
`
`and cradle 11A or a cordless handset 11B.
`
`In this instance,
`
`the cellular phone and cradle combination 11A can communicate
`
`with system controller 12 via a plug-in wire link
`
`HTC Exhibit 1004
`
`

`

`wo 95/23485
`
`PCT/ A U95/00098
`
`-5-
`
`communicating with a serial interface port 23 on the cellular
`
`phone.
`
`The cordless handset 11B communicates with system
`
`controller 12 via the CT1/CT2/CT3 interface 18.
`
`5
`
`In either case, in use, an operator of the handset 11
`
`communicates a desired mode of operation to system controller
`
`12 by depressing appropriate function keys on keypad 22. The
`
`mode selected can be confirmed to the user by display of an
`
`appropriate message on a display 24 associated with the
`
`10
`
`keypad 22 on the handset 11. The intention is that the
`
`communications link 25 from handset 11 to system controller
`
`12 is or need only be a
`
`low power, short range link.
`
`Furthermore, in a particular implementation, the
`
`handset 11 comprises a cellular telephone handset adapted for
`
`15
`
`operation.on the cellular telephone network without
`
`utilisation of communications link 25. However, where a
`
`boosted communications signal in cellular telephone mode is
`
`required or where it is required to communicate in a mode
`
`other than cellular telephone mode -
`
`for example on the
`
`20
`
`trunked radio system then the communications link 25 is
`
`utilised to communicate to systems controller 12 via keypad
`
`22 the desired mode of operation.
`
`In this mode of operation
`
`the cellular phone uses the base unit 10 as a local relay
`
`station.
`
`25
`
`Exemplary modes of operation of the communications
`
`system according to a first embodiment of the invention will
`
`now be described with reference to Figs. 2, 3, 4 and 5.
`
`In a first mode of operation as illustrated in Fig. 2 a
`
`HTC Exhibit 1004
`
`

`

`W095/23485
`
`PCT/AU95/00098
`
`-6-
`
`normal cellular telephone is used to provide a hands free
`
`cellular phone with optional power amplifier booster in the
`
`form of base unit 10. The DGPS module 17 and cellular modem
`
`16 can also be brought into operation via system controller
`
`5
`
`12 to provide positional information to a user of handset 11.
`
`With reference to Fig. 3 a second mode of operation is
`
`illustrated where a normal cellular telephone is used as
`
`handset 11 to provide communication with the trunked radio
`
`system. Hands free operation is possible utilising the hands
`
`10
`
`free mode, where provided, on the cellular telephone. Again,
`
`the DGPS module 17 can be connected into the system to
`
`provide positional information. The system can be either
`
`duplex or simplex in operation.
`
`Fig. 4 illustrates a third mode of operation wherein
`
`15
`
`the handset 11 comprises a cellular phone switchable to
`
`trunking radio mode by operation of appropriate function keys
`
`on keypad 22.
`
`In this case the trunking radio booster 14 is
`
`switched into circuit to provide power amplification whilst
`
`the DGPS module 17 is utilised to provide position
`
`20
`
`information for display on display 24.
`
`Fig. 5 illustrates a fourth mode of operation wherein
`
`handset 11 is implemented as a cordless mobile telephone
`
`handset in cordless communication with system controller 12
`
`via a CT1/CT2/CT3 interface 18. Once again, the cordless
`
`25
`
`handset can operate as a cellular mobile telephone or
`
`alternatively it can communicate with system controller 12 so
`
`as to provide access to the trunked radio network in either
`
`the duplex or simplex mode.
`
`HTC Exhibit 1004
`
`

`

`W095/2348~
`
`PCT/AU95/00098
`
`-7-
`
`In its most straightforward implementation the handset
`
`11 is implemented as a conventional cellular telephone
`
`handset incorporating software modifications which permit
`
`communication via a serial interface port 23 or via a
`
`5
`
`CT1/CT2/CT3 interface module 18 with a locally located system
`
`controller within a base unit 10.
`
`In this manner the
`
`cellular phone can operate normally as a cellular phone or
`
`alternatively can provide access to the facilities
`
`incorporated within base unit 10, most preferably at least
`
`10
`
`including a trunked radio module 15 with trunking radio
`
`booster 14.
`
`With reference to Fig. 6 selected portions of the base
`
`unit 10 illustrated and described with reference to Fig. 1
`
`can be incorporated within a cellular telephone casing to
`
`15
`
`provide a.single hand held dual mode communications device
`
`adapted for communication with either the cellular telephone
`
`network or with the trunked radio network.
`
`In the embodiment illustrated in Fig. 6 a mobile
`
`telephone casing 26 incorporates the conventional components
`
`20
`
`of a cellular telephone 27 together with the relevant
`
`components from base unit 10 which provide access to the
`
`trunked radio network including trunking RF/digital MPT1327
`
`module 15 and trunking radio booster 14.
`
`In this manner dual
`
`mode cellular telephone and trunked radio network mode
`
`25
`
`operations are provided within the one hand held phone
`
`module. Other elements from base unit 10 can be incorporated
`
`including CT1/CT2/CT3 or DECT interface module 18 allowing
`
`operation of the hand held phone module in CT1/CT2/CT3 or
`
`HTC Exhibit 1004
`
`

`

`W095/23485
`
`PCT/A U95/00098
`
`-a-
`
`DECT mode as well.
`
`With reference to Fig. 7 a base unit 110 according to a
`
`third embodiment of the invention is illustrated in block
`
`diagram form. The modules within the base unit 110 include
`
`5
`
`the following:
`
`(i) Cellular Phone Module III meeting one or more of
`
`the following standards - GSM, E-GSM, P-GSM, PCN,
`
`AMPS, ETACS, NMT450, CDMA. The digital board and
`
`RF board for the cellular phone will be included
`
`10
`
`in the radio system.
`
`Interface to the digital
`
`board is via an external communications
`
`interface, for controlling call setup and
`
`receive.
`
`(ii) DGPS module 112 - The DGPS module provides
`
`15
`
`geodetic information at the multi-mode radio
`
`system, for use either by the multi-mode radio
`
`system or at a remote location. The DGPS module
`
`may accept DGPS correction information to provide
`
`higher accuracy.
`
`20
`
`(iii) Trunking Radio module 113 meets the MPT1327 or
`
`any other standard for trunking radio. The
`
`trunking radio module includes the RF and digital
`
`sections of an MPT1327 trunking radio.
`
`Interface
`
`to the trunking radio module may be via an
`
`25
`
`external communications interface for controlling
`
`call setup and receive.
`
`(iv) Trunking Radio booster 114. The trunking radio
`
`booster module may be used to amplify the MPT1327
`
`HTC Exhibit 1004
`
`

`

`wo 95/23485
`
`PCT/AU95/00098
`
`-9-
`
`trunking radio signal to increase the range and reception of
`
`the trunking radio module.
`
`(v) Cellular Phone booster 115. The cellular phone
`
`booster module may be used to amplify the
`
`5
`
`cellular phone signal to increase the range and
`
`reception of the cellular phone module.
`
`The data communication between the modules in the
`
`multi-mode radio system module of Fig. 7 may be via a serial
`
`communication protocol or a parallel communication protocol.
`
`10
`
`An audio interface may also be connected between the system
`
`controller, cellular phone module, trunking radio module and
`
`cordless communication base station.
`
`A serial interface may be provided to the DGPS module
`
`112 to allow information to be passed to and from the DGPS
`
`15
`
`module and the system controller and other communications
`
`modules.
`
`A data interface and an audio interface'may be
`
`connected between the system controller and the paging module
`
`to allow both data messages and audio messages to be passed
`
`20
`
`from the paging module to the system controller.
`
`A data interface and an audio interface may be
`
`connected between the system controller and the cordless
`
`communication base station to allow call setup information
`
`(data), keypress information (data), LCD display information
`
`25
`
`(data) and audio to be passed between the cordless
`
`communication base station and the system controller.
`
`In addition the base unit 110 includes a paging module
`
`116, a cordless communication base station 117 (CT1, CT2,
`
`HTC Exhibit 1004
`
`

`

`W095/23485
`
`PCT/AU95/00098
`
`-10-
`
`CT3, DECT or similar) and a cellular modem 118, all in
`
`communication with system controller 119.
`
`The manner of operation of the base unit 110 is the
`
`same as that in respect of the base unit 10 according to the
`
`5
`
`first embodiment of the invention.
`
`The base unit 110 can be utilised in conjunction with a
`
`handset as previously described so as to operate in at least
`
`two modes of operation as follows:-
`
`In a first mode the handset is used to select cellular
`
`10
`
`telephone operation. That call is then initiated by the user
`
`with the handset. The system controller in the multi-mode
`
`radio system controller switches the audio and data interface
`
`to the cellular phone module within the system. A call is
`
`then initiated over the cellular phone communication protocol
`
`15
`
`to the public network. The cellular phone booster may be
`
`used to increase the gain of the signal transmitted. The
`
`DGPS module and cellular modem may also be used to pass
`
`geodetic information across the cellular network. The
`
`cellular phone communication protocol may be compliant to one
`
`20
`
`of the following standards, AMPS, ETACS, GSM, COMA, TDMA,
`
`DCS-1800, NMT450.
`
`In a second mode of operation the handset is utilised
`
`to select trunking radio operation whereby the trunking radio
`
`module 113 in the base unit 110 is utilised to enable
`
`25
`
`communications over a trunking radio network, for example,
`
`compliant to MPT1327.
`
`As earlier described with reference to Fig. 6 it is
`
`possible to incorporate at least portions of a base unit and
`
`HTC Exhibit 1004
`
`

`

`W095/23485
`
`PCT/AU95/00098
`
`-11-
`
`handset into a single casing. A dual mode handset 121
`
`operable according to the block diagram of Fig. 8 will now be
`
`described.
`
`The dual mode handset 121 can incorporate technology
`
`5
`
`from any two of the following _communication protocols:GSM,
`
`MPT1327, Trunking Radio, AMPS, ETACS, TDMA, CDMA, PCN, CT1,
`
`CT2, CT3, DECT.
`
`With the advent of cordless office applications and
`
`constant contactability demands, there is a requirement for a
`
`10
`
`single handset that offers the flexibility of addressing the
`
`requirements for more than one communications protocol.
`
`The different communications protocols offer a variety
`
`of applications. For example the trunking radio system is
`
`typically associated with fleet and industrial applications.
`
`15
`
`The GSM, AMPS, ETACS, TDMA and CDMA networks, are typically
`
`focused towards the business, corporate and consumer markets.
`
`The CT1, CT2 and CT3 technologies are most commonly
`
`associated with cordless office applications. These
`
`~equirements often overlap so there exists an application for
`
`20
`
`~ handset that services more than one of these requirements.
`
`The dual mode handset 121 of Fig. 8 comprises a mode 1
`
`digital module 122 and a mode 2.digital module 123. Each
`
`module is adapted to operate according to a particular, but
`
`different communications protocol or "mode" as compared with
`
`25
`
`the other module 122, 123. The handset 121 additionally
`
`includes an RF portion 124 specific to mode 1 and an RF
`
`portion 125 specific to mode 2. Both these RF portions are
`
`HTC Exhibit 1004
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`

`

`wo 95/23485
`
`PCT/A U95/00098
`
`-12-
`
`driven from a generic radio frequency module 126.
`
`In
`
`addition the handset includes a display 127, a keypad 128,
`
`and memory peripherals 129. The components 127, 128 and 129
`
`are common to both modes of operation of the handset 121.
`
`5
`
`The first mode of the handset may be any of the above
`
`mentioned technologies. The second mode of the handset may
`
`also be any of the above mentioned technologies.
`
`The radio frequency modules of the two modes may be
`
`partially or wholly combined to reduce the required circuitry
`
`10
`
`for the handset.
`
`Separate digital modules may be maintained to ensure
`
`correct operation of the handset under each mode. The
`
`digital module of each mode, may include a microprocessor and
`
`any integrated circuitry specific to the mode of operation
`
`15
`
`i.e. Channel coder/decoder for a GSM digital module.
`
`The handset may change modes from one mode to the other
`
`by specified functions on the keypad, or by the selection of
`
`one of a number of menu functions.
`
`The necessary software for both the modes of operation
`
`20
`
`will be contained in the one handset. Some portions of
`
`software may be common to both the modes including the man
`
`machine interface, and the software for the control of common
`
`hardware components.
`
`The handset may dynamically switch a call made in one
`
`25
`
`mode to the second mode, by holding the current call until
`
`the call is re-established, using the second mode.
`
`Alternatively, the handset may cancel the first call and
`
`automatically re-establish using the second mode.
`
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`

`W095/23485
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`-13-
`
`The handset may accept specified incoming call messages
`
`indicating that a second dual mode handset is currently
`
`switching mode.
`
`The manner of operation of the dual mode handset 121 is
`
`5
`
`generally in accordance with that described in respect of
`
`Fig. 6. A detailed logic flow diagram of the automatic
`
`switchover operation is provided in Fig. 9 where mode 1
`
`operation is defined as CT2 operation and mode 2 operation is
`
`defined as GSM operation.
`
`10
`
`It will be appreciated that these modes are merely
`
`exemplary and other operational modes, as earlier listed, can
`
`be utilised in substitution for either the CT2 or GSM modes
`
`of operation.
`
`The controllers incorporated in the embodiments of the
`
`15
`
`invention described thus far can include additional software
`
`or logic which permits monitoring of signal strength and the
`
`like for the purpose of initiating compensating action.
`
`In
`
`its simplest form as previously described a booster can be
`
`switched in.
`
`In a more complex form as to now be described
`
`20
`
`in more detail a switchover between modes can be performed.
`
`With reference to Fig. 13 a call may be being carried
`
`in "mode 1" to handpiece 211. Logic within system controller
`
`212 monitors changes in signal strength and the like. A
`
`reduction in signal strength can be interpreted as a failure
`
`25
`
`condition or the approach of a failure condition whereupon
`
`controller 212 will initiate a separate call to the same
`
`number in an alternative mode of operation (in this case
`
`"mode 2").
`
`If the mode 2 call is successful then controller
`
`HTC Exhibit 1004
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`

`

`wo 95/23485
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`-14-
`
`212 simply transfers the connection of handpiece 211 across
`
`to the mode 2 connection and disconnects the mode 1
`
`connection. Corresponding monitoring is done of the mode 2
`
`connection and, should a failure condition be detected then a
`
`5
`
`corresponding attempt will be made to reinitiate a mode 1
`
`connection and transfer.
`
`Alternatively a user, via the keypad 213 can initiate a
`
`request for transfer of mode.
`
`Figs. 10, 11 and 12 provide particular examples of this
`
`10
`
`automatic switchover facility.
`
`Fig. 10 is a block diagram of another method of the
`
`invention using a trunking radio module to invoke
`
`communications over a trunking network compliant to MPT 1327
`
`and/or APC 025 when finalised or becomes a standard but not
`
`15
`
`limited to those standards. The cordless or corded handset
`
`150 communicates with controller 212.
`
`If the user is on the
`
`AMPS cellular network and the network no longer has good
`
`cover due to the lack of cells or no cells being available,
`
`the handset will automatically redial the number and make
`
`20
`
`connection. As an alternative, the controller 212 will
`
`identify the signal weakening and redial, hold the call and
`
`connect seemlessly via the trunking network if available.
`
`Fig. 11 is a block diagram of another method of the
`
`application of the automatic switchover facility in which the
`
`25
`
`subscriber is communicating via the CT2 cordless mode as the
`
`subscriber moves out of range. The CT2 handset has the
`
`capability of changing mode from CT2 to the GSM network in
`
`the manner described with reference to Fig. 9. The
`
`HTC Exhibit 1004
`
`

`

`W095/23485
`
`PCT/AU95/00098
`
`-15-
`
`handset and/or the controller 212 will hold the call whilst
`
`redialling and reconnecting the two calls seemlessly as
`
`described with reference to Fig. 13. A special code may be
`
`transmitted to allow the previous call to be rerouted prior
`
`5
`
`to the handset accepting new calls.
`
`Fig. 12 is a block diagram of a further application of
`
`the automatic switchover facility which allows the subscriber
`
`to initiate a change from the CT2 mode to, say, the GSM mode
`
`by pressing a function button and the handset controller
`
`10
`
`which will automatically dial up the GSM network and re-route
`
`the two calls seemlessly. The re-routing will also carry
`
`special identification allowing the base unit or handset at
`
`the other end to know it is a re-routed call and to accept
`
`the call.
`
`15
`
`INDUSTRIAL APPLICABILITY
`
`The invention is applicable in the fields of wireless
`
`and mobile telecommunications.
`
`HTC Exhibit 1004
`
`

`

`W095/23485
`
`PCT/AU95/00098
`
`-16-
`
`CLAIMS
`
`1.
`
`A multi-mode communications system including a hand
`
`held phone module and incorporating means allowing selection
`
`of one from a multiple of available modes of operation.
`
`2.
`
`The system of claim 1 wherein said modes of operation
`
`comprise different forms of network communications protocols
`
`and standards.
`
`3.
`
`The system of claim 2 wherein said communications
`
`protocols and standards are selected from:
`
`cellular telephone (all standards including but not
`
`limited to GSM, E-GSM, P-GSM, PCM, AMPS, ETACS,
`
`NMT450);
`
`trunking radio system (TRS);
`
`DGPS network;
`
`cordless localised access networks including CTl, CT2,
`
`CT3;
`
`4.
`
`The system of any previous claim wherein said means
`
`allowing selection comprises a. base unit in communication
`
`with said hand held phone module.
`
`5.
`
`The system of claim 4 wherein said base unit includes a
`
`system controller adapted for communication with at least a
`
`keypad portion of said hand held phone module.
`
`HTC Exhibit 1004
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`

`wo 95/23485
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`PCT/AU95/00098
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`-17-
`
`6.
`
`The system of claim 5 wherein said system controller
`
`communicates with said keypad portion via a serial interface.
`
`7.
`
`The system of claim 5 wherein said system controller
`
`communicates with said keypad via a cordless communication
`
`protocol selected from CT1/CT2/CT3 or DECT.
`
`8.
`
`The system of claim 5 or 7 wherein communications
`
`between said system controller and said keypad are at
`
`relatively low power and said base unit incorporates booster
`
`means for issuing a high power communications signal.
`
`9.
`
`The system of any one of claims 4 to 8 wherein said
`
`base unit is incorporated within said hand held phone module.
`
`10.
`
`The system of any one of claims 3 to 9 wherein the
`
`modes of operation thereof are limited to selection between
`
`cellular phone and trunked radio.
`
`11.
`
`The system of any previous claim wherein said system is
`
`housed within a single enclosure.
`
`12.
`
`The system of any previous claim incorporating an
`
`automatic switchover facility (as defined in the
`
`specification).
`
`13.
`
`A dual mode handset adapted to be switched by a user
`
`between two modes of operation.
`
`HTC Exhibit 1004
`
`

`

`W095/23485
`
`PCT/AU95/00098
`
`-18-
`
`14.
`
`The handset of claim 1.3 wherein said modes of operation
`
`are selected from GSM, MPT1327, Trunking Radio, AMPS, ETACS,
`
`TDMA, CDMA, PCN, CT1, CT2, CT3, DECT.
`
`15.
`
`The handset of claim 13 or claim 14 incorporating an
`
`automatic switchover facility.
`
`HTC Exhibit 1004
`
`

`

`wo 95/23485
`
`PCT/AU95/00098
`
`1 I 12.
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`HTC Exhibit 1004
`
`

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`HTC Exhibit 1004
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`W095/23485
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`PCT/A U95/00098
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`HTC Exhibit 1004
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`HTC Exhibit 1004
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`W095/23485
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`HTC Exhibit 1004
`
`

`

`wo 95/23485
`
`PCT/AU95/00098
`
`I 0/12
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`HTC Exhibit 1004
`
`

`

`W095(23485
`
`PCT/AU95/00098
`
`I\ /12
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`PU8LIC ACCESS
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`HTC Exhibit 1004
`
`

`

`W095/23485
`
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`
`12/12
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`F/6. 13
`
`HTC Exhibit 1004
`
`