`
`WORLD INTELLECTUAL PROPERTY ORGANIZATION
`Intemauonal Bureau
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`
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`INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT)
`
`(51) International Patent Classification 6 i
`H04
`7/20
`Q
`
`(11) International Publication Number:
`(43) International Publication Date:
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`WO 95/23485
`31 August 1995 (31.08.95)
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`~J
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`is.
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`(21) International Application Number:
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`PCT/AU95/00098
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`(22) International Filing Date:
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`28 February 1995 (28.02.95)
`
`(30) Priority Data:
`PM 4143
`
`28 February 1994 (28.02.94)
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`AU
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`(71) Applicant (for all designated States except US): VOXSON
`INTERNATIONAL PTY. LIMITED [AU/AU]; 231 Holt
`Street, Pinkenba, QLD 4008 (AU).
`
`(72) Inventor; and
`LONGGINOU, Lucas
`('75) Inventor/Applicant (for US only):
`[AU/AU]; 55 Riverview Terrace, Hamilton, QLD 4007
`(AU).
`
`(74) Agent: MAXWELL, Peter, Francis; Peter Maxwell & Asso-
`ciates, Blaxland House, 5 Ross Street, North Parramatta,
`NSW 2151 (AU).
`
`(81) Designated States: AM, AT, AU. BB, BG, BR, BY, CA,
`CN, CZ, DE, DK, EE, ES, FI, 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,
`TI, TI‘, 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).
`
`Published
`With international search report.
`
`
`
`(54) Title: MUL'I'I~MODE COMMUNICATIONS SYSTEM
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`(57) Abstract
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`A multi-mode communication system including a hand-held phone module (1 l) 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
`(Le. 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.
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`PCT/AU95/00098
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`MULTI-MODE COMMUNICATIONS SYSTEM
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`FIELD OF THE INVENTION
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`The present invention relates to multi-mode
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`communications systems and, more particularly,
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`systems incorporating a hand held means of control.
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`BACKGROUND ART
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`There exists today many competing forms of
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`through trunking radio systems and on to more specialised
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`forms of network such as the DGPS network and the CT1, 0T2,
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`CT3 or DECT systems.
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`It is an object of the present invention to provide
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`hand held access to more than one of these systems via a
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`DISCLOSURE OF THE INVENTION
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`Accordingly,
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`is provided a multi-mode communications system including a
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`communications protocols and standards are selected from:
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`cellular telephone (all standards including but not
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`NMT450);
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`trunking radio system (TRS);
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`DGPS network;
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`cordless localised access networks including CTl, CT2,
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`Preferably said means allowing selection comprises a
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`base unit in communication with said hand held phone module.
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`Preferably said base unit includes a system controller
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`adapted for communication with at least a keypad portion of
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`controller communicates with said keypad portion via a serial
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`controller communicates with said keypad via a cordless
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`communication protocol selected from CTl/CTZ/CTa and DECT.
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`Preferably communications between said system
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`controller and said keypad are at relatively low power and
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`thereof are limited to selection between cellular phone and
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`BRIEF DESCRIPTION OF THE DRAWINGS
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`Embodiments of the invention will now be described with
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`reference to the accompanying drawings wherein:—
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`is a block diagram of a base unit and
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`the invention,
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`unit and handset
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`casing in accordance with a second
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`Fig. 13
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`MODES FOR CARRYING OUT THE INVENTION
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`A multi—mode communication system according to a first
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`embodiment of the invention comprises a base unit 10 in
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`The base unit 10 includes system controller 12 in
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`bidirectional communication with a cellular phone booster 13,
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`module 15, a cellular modem/paging module 16, a DGPS module
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`17, CT1/CT2/CT3 interface module 18 and display 19. Aerial
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`20 transmits/receives signals for either one of cellular
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`The handset 11 can comprise a cellular phone handset
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`communicating with a serial interface port 23 on the cellular
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`communications link 25 from handset 11 to system controller
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`12 is or need only be a low power, short range link.
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`handset 11 comprises a cellular telephone handset adapted for
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`operation on the cellular telephone network without
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`utilisation of communications link 25. However, where a
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`22 the desired mode of operation.
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`Exemplary modes of operation of the communications
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`system according to a first embodiment of the invention will
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`now be described with reference to Figs. 2, 3,
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`4 and 5.
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`normal cellular telephone is used to provide a hands free
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`cellular phone with optional power amplifier booster in the
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`form of base unit 10.
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`The DGPS module 17 and cellular modem
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`16 can also be brought into operation via system controller
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`12 to provide positional information to a user of handset 11.
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`illustrated where a normal cellular telephone is used as
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`handset 11 to provide communication with the trunked radio
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`system. Hands free operation is possible utilising the hands
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`free mode, where provided, on the cellular telephone. Again,
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`the DGPS module 17 can be connected into the system to
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`duplex or simplex in operation.
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`Fig. 4 illustrates a third mode of operation wherein
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`the handset 11 comprises a cellular phone switchable to
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`trunking radio mode by operation of appropriate function keys
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`In this case the trunking radio booster 14 is
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`the DGPS module 17 is utilised to provide position
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`information for display on display 24.
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`Fig. 5 illustrates a fourth mode of operation wherein
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`handset 11 is implemented as a cordless mobile telephone
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`handset in cordless communication with system controller 12
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`via a CT1/CT2/CT3 interface 18. Once again,
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`handset can operate as a cellular mobile telephone or
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`alternatively it can communicate with system controller 12 so
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`as to provide access to the trunked radio network in either
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`the duplex or simplex mode.
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`In its most straightforward implementation the handset
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`11 is implemented as a conventional cellular telephone
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`handset incorporating software modifications which permit
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`communication via a serial interface port 23 or via a
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`CT1/CT2/CT3 interface module 18 with a locally located system
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`controller within a base unit 10.
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`In this manner the
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`cellular phone can operate normally as a cellular phone or
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`alternatively can provide access to the facilities
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`incorporated within base unit 10, most preferably at least
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`including a trunked radio module 15 with trunking radio
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`booster 14.
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`With reference to Fig. 6 selected portions of the base
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`unit 10 illustrated and described with reference to Fig.
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`can be incorporated within a cellular telephone casing to
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`provide a single hand held dual mode communications device
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`adapted for communication with either the cellular telephone
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`network or with the trunked radio network.
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`In the embodiment illustrated in Fig. 6 a mobile
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`telephone casing 26 incorporates the conventional components
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`of a cellular telephone 27 together with the relevant
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`components from base unit 10 which provide access to the
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`trunked radio network including trunking RF/digital MPT1327
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`module 15 and trunking radio booster 14.
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`In this manner dual
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`mode cellular telephone and trunked radio network mode
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`operations are provided within the one hand held phone
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`module. Other elements from base unit 10 can be incorporated
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`including CT1/CT2/CT3 or DECT interface module 18 allowing
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`operation of the hand held phone module in CT1/CT2/CT3 or
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`WO 95/23485
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`PCT/AU95/00098
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`DECT mode as well.
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`With reference to Fig.
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`7 a base unit 110 according to a
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`third embodiment of the invention is illustrated in block
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`diagram form.
`the following:
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`5.
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`The modules within the base unit 110 include
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`(1)
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`Cellular Phone Module III meeting one or more of
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`the following standards — GSM, E—GSM, P-GSM, PCN,
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`AMPS, ETACS, NMT450, CDMA.
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`The digital board and
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`RF board for the cellular phone will be included
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`in the radio system.
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`Interface to the digital
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`board is via an external communications
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`interface, for controlling call setup and
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`receive.
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`(ii)
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`DGPS module 112 — The DGPS module provides
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`geodetic information at the multi-mode radio
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`system, for use either by the multi—mode radio
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`system or at a remote location.
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`The DGPS module
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`may accept DGPS correction information to provide
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`(iii) Trunking Radio module 113 meets the MPT1327 or
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`The
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`trunking radio module includes the RF and digital
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`sections of an MPT1327 trunking radio.
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`Interface
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`to the trunking radio module may be via an
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`external communications interface for controlling
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`call setup and receive.
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`(iv) Trunking Radio booster 114.
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`The trunking radio
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`booster module may be used to amplify the MPT1327
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`WO 95123485
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`PCT/AU95/00098
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`trunking radio signal to increase the range and reception of
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`the trunking radio module.
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`(v)
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`Cellular Phone booster 115.
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`The cellular phone
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`booster module may be used to amplify the
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`cellular phone signal to increase the range and
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`reception of the cellular phone module.
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`The data communication between the modules in the
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`multi-mode radio system module of Fig.
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`7 may be via a serial
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`communication protocol or a parallel communication protocol.
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`An audio interface may also be connected between the system
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`controller, cellular phone module,
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`trunking radio module and
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`cordless communication base station.
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`A serial interface may be provided to the DGPS module
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`112 to allow information to be passed to and from the DGPS
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`module and the system controller and other communications
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`modules.
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`A data interface and an audio interface may be
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`connected between the system controller and the paging module
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`to allow both data messages and audio messages to be passed
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`A data interface and an audio interface may be
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`connected between the system controller and the cordless
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`communication base station to allow call setup information
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`(data), keypress information (data), LCD display information
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`(data) and audio to be passed between the cordless
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`communication base station and the system controller.
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`In addition the base unit 110 includes a paging module
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`116, a cordless communication base station 117 (CTl, 0T2,
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`WO 95/23485
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`PCT/AU95/00098
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`-10-
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`CT3, DECT or similar) and a cellular modem 118, all in
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`communication with system controller 119.
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`The manner of operation of the base unit 110 is the
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`same as that in respect of the base unit 10 according to the
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`first embodiment of the invention.
`The base unit 110 can be utilised in conjunction with a
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`handset as previously described so as to operate in at least
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`two modes of operation as follows:-
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`In a first mode the handset is used to select cellular
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`telephone operation. That call is then initiated by the user
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`with the handset.
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`The system controller in the multi-mode
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`radio system controller switches the audio and data interface
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`then initiated over the cellular phone communication protocol
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`to the public network.
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`The cellular phone booster may be
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`used to increase the gain of the signal transmitted.
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`The
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`DGPS module and cellular modem may also be used to pass
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`geodetic information across the cellular network.
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`The
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`cellular phone communication protocol may be compliant to one
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`of the following standards, AMPS, ETACS, GSM, CDMA, TDMA,
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`DCS-1800, NMT450.
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`In a second mode of operation the handset is utilised
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`to select trunking radio operation whereby the trunking radio
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`module 113 in the base unit 110 is utilised to enable
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`communications over a trunking radio network, for example,
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`compliant to MPT1327.
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`As earlier described with reference to Fig. 6 it is
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`possible to incorporate at least portions of a base unit and
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`Page 12 of 32
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`Page 12 of 32
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`WO 95/23485
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`PCT/AU95/00098
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`_11_
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`handset into a single casing.
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`A dual mode handset 121
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`operable according to the block diagram of Fig.
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`8 will now be
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`described.
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`The dual mode handset 121 can incorporate technology
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`from any two of the following communication protocols:GSM,
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`MPT1327, Trunking Radio, AMPS, ETACS, TDMA, CDMA, PCN, CT1,
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`CT2, CT3, DECT.
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`With the advent of cordless office applications and
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`constant contactability demands,
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`there is a requirement for a
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`single handset that offers the flexibility of addressing the
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`requirements for more than one communications protocol.
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`The different communications protocols offer a variety
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`of applications.
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`For example the trunking radio system is
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`typically associated with fleet and industrial applications.
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`The GSM, AMPS, ETACS, TDMA and CDMA networks, are typically
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`focused towards the business, corporate and consumer markets.
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`The 0T1, CT2 and CT3 technologies are most commonly
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`associated with cordless office applications. These
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`requirements often overlap so there exists an application for
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`a handset that services more than one of these requirements.
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`The dual mode handset 121 of Fig. 8 comprises a mode 1
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`digital module 122 and a mode 2.digita1 module 123.
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`Each
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`module is adapted to operate according to a particular, but
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`different communications protocol or "mode" as compared with
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`the other module 122, 123.
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`The handset 121 additionally
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`includes an RF portion 124 specific to mode 1 and an RF
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`portion 125 specific to mode 2. Both these RF portions are
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`Page 13 of 32
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`SAMSUNG EXHIBIT 1004
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`Page 13 of 32
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`WO 95/23485
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`PCT/AU95/00098
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`driven from a generic radio frequency module 126.
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`In
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`addition the handset includes a display 127, a keypad 128,
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`and memory peripherals 129.
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`The components 127, 128 and 129
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`are common to both modes of operation of the handset 121.
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`5
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`The first mode of the handset may be any of the above
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`mentioned technologies.
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`The second mode of the handset may
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`also be any of the above mentioned technologies.
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`The radio frequency modules of the two modes may be
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`partially or wholly combined to reduce the required circuitry
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`for the handset.
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`Separate digital modules may be maintained to ensure
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`correct operation of the handset under each mode.
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`The
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`digital module of each mode, may include a microprocessor and
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`any integrated circuitry specific to the mode of operation
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`i.e. Channel coder/decoder for a GSM digital module.
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`The handset may change modes from one mode to the other
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`by specified functions on the keypad, or by the selection of
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`one of a number of menu functions.
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`The necessary software for both the modes of operation
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`will be contained in the one handset.
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`Some portions of
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`software may be common to both the modes including the man
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`machine interface, and the software for the control of common
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`hardware components.
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`The handset may dynamically switch a call made in one
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`mode to the second mode, by holding the current call until
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`the call is re—established, using the second mode.
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`Alternatively,
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`the handset may cancel
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`the first call and
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`automatically re-establish using the second mode.
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`Page 14 of 32
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`SAMSUNG EXHIBIT 1004
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`HTC Exhibit 1004
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`Page 14 of 32
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`SAMSUNG EXHIBIT 1004
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`WO 95/23485
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`PCT/AU95/00098
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`_13_.
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`The handset may accept specified incoming call messages
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`indicating that a second dual mode handset is currently
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`switching mode.
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`The manner of operation of the dual mode handset 121 is
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`generally in accordance with that described in respect of
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`A detailed logic flow diagram of the automatic
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`switchover operation is provided in_Fig. 9 where mode 1
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`operation is defined as CT2 operation and mode 2 operation is
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`defined as GSM operation.
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`It will be appreciated that these modes are merely
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`exemplary and other operational modes, as earlier listed, can
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`be utilised in substitution for either the CT2 or GSM modes
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`of operation.
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`The controllers incorporated in the embodiments of the
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`invention described thus far can include additional software
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`Or logic which permits monitoring of signal strength and the
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`like for the purpose of initiating compensating action.
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`In
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`its simplest form as previously described a booster can be
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`switched in.
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`In a more complex form as to now be described
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`in more detail a switchover between modes can be performed.
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`With reference to Fig. 13 a call may be being carried
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`in "mode 1" to handpiece 211. Logic within system controller
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`212 monitors changes in signal strength and the like.
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`A
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`reduction in signal strength can be interpreted as a failure
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`condition or the approach of a failure condition whereupon
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`controller 212 will initiate a separate call to the same
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`number in an alternative mode of operation (in this case
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`"mode 2").
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`If the mode 2 call is successful then controller
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`Page 15 of 32
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`SAMSUNG EXHIBIT 1004
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`Page 15 of 32
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`WO 95/23485
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`PCT/AU95/00098
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`-14-
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`212 simply transfers the connection of handpiece 211 across
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`to the mode 2 connection and disconnects the mode 1
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`connection. Corresponding monitoring is done of the mode 2
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`connection and, should a failure condition be detected then a
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`corresponding attempt will be made to reinitiate a mode 1
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`connection and transfer.
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`Alternatively a user, via the keypad 213 can initiate a
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`request for transfer of mode.
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`Figs. 10, 11 and 12 provide particular examples of this
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`automatic switchover facility.
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`Fig. 10 is a block diagram of another method of the
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`invention using a trunking radio module to invoke
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`communications over a trunking network compliant
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`to MPT 1327
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`and/or APC 025 when finalised or becomes a standard but not
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`limited to those standards.
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`The cordless or corded handset
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`150 communicates with controller 212.
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`If the user is on the
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`AMPS cellular network and the network no longer has good
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`cover due to the lack of cells or no cells being available.
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`the handset will automatically redial the number and make
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`connection. As an alternative,
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`the controller 212 will
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`identify the signal weakening and redial, hold the call and
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`connect seemlessly via the trunking network if available.
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`Fig. 11 is a block diagram of another method of the
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`application of the automatic switchover facility in which the
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`subscriber is communicating via the CT2 cordless mode as the
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`subscriber moves out of range.
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`The CT2 handset has the
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