Case 5:19-cv-00036-RWS Document 379-5 Filed 07/02/20 Page 1 of 33 PageID #: 17908
`Case 5:19-cv-00036—RWS Document 379-5 Filed 07/02/20 Page 1 of 33 PageID #: 17908
`
`
`
`
`
`
`
`EXHIBIT D
`
`EXHIBIT D
`
`
`
`

`

`Case 5:19-cv-00036-RWS Document 379-5 Filed 07/02/20 Page 2 of 33 PageID #: 17909
`
`APL-MAXELL_00719230
`
`PCT
`WORLD INTELLECTUAL PROPERTY ORGANIZATION
`International Bureau
`INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT)
`WO 96/27974
`(51) International Patent Classification 6 :
`(11) International Publication Number:
`H04M 19/02, 19/04, U57
`
`(43) International Publication Date: 12 September 1996 (12.09.96)
`
`(21) International Application Number:
`
`PCT/EP96/01100
`
`(22) International Filing Date:
`
`8 March 1996 (08.03.96)
`
`(30) Priority Data:
`8 March 1995 (08.03.95)
`95200569.2
`(34) Countries for which the regional or
`international application was filed:
`
`EP
`
`AT et al.
`
`(71) Applicant (for all designated States except US): TELEFON-
`AKTIEBOLAGET LM ERICSSON (publ) [SE/SEJ; S-126
`25 Stockholm (SE).
`
`(72) Inventors; and
`(75) Inventors/Applicants (for US only): VAN DER SALM, Peter
`[NL/NLJ; Buys Ballotstraat 14, NL-3572 ZR Utrecht (NL).
`TEN WOLDE, Jan, Hendrik, Louis [NL/NL]; Vincent van
`Goghlaan 76, NL-7545 RP Enschede (NL).
`
`(74) Agent: DOHMEN, Johannes, Maria, Gerardus; Ericsson Busi­
`ness Mobile Networks B.V., P.O. Box 75564, NL-1070 AN
`Amsterdam (NL).
`
`(81) Designated States: AL, AM, AU, AZ, BB, BG, BR, BY, CA,
`CN, CZ, EE, GE, HU, IS, JP, KE, KG, KP, KR, KZ, LK,
`LR, LS, LT, LV, MD, MG, MK, MN, MW, MX, NO, NZ,
`PL, RO, RU, SD, SG, SI, SK, TJ, TM, TR, TT, UA, UG,
`US, UZ, VN, ARIPO patent (KE, LS, MW, SD, SZ, UG),
`Eurasian patent (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM),
`European patent (AT, BE, CH, DE, DK, ES, FI, 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).
`
`Published
`With international search report.
`Before the expiration of the time limit for amending the
`claims and to be republished in the event of the receipt of
`amendments.
`
`(54) Title: A TELEPHONE SET HAVING CALLING PARTY DEPENDENT RINGING
`
`(57) Abstract
`
`A telecommunications terminal de­
`vice such as a telephone set, in particular
`a radio telephone set (1), comprising ring
`generator means (12, 16) for producing a
`ringing sound in accordance with signalling
`information received by the terminal device
`and relating to the identity of a calling party.
`The ring generator means (12, 16) are ar­
`ranged for producing a ringing sound from
`calling party identity data provided by the
`signalling information. The ringing sound
`may be produced directly from the received
`signalling information data, through differ­
`ent processing algorithms and, additionally,
`from data stored in memory means (19)
`and associated with the identity of a call­
`ing party for producing a dedicated pro­
`grammable ringing sound or even the name
`of a calling party.
`
`

`

`Case 5:19-cv-00036-RWS Document 379-5 Filed 07/02/20 Page 3 of 33 PageID #: 17910
`
`APL-MAXELL_00719231
`
`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.
`
`AM
`AT
`AU
`BB
`BE
`BF
`BG
`BJ
`BR
`BY
`CA
`CF
`CG
`CH
`CI
`CM
`CN
`CS
`CZ
`DE
`DK
`EE
`ES
`FI
`FR
`GA
`
`Armenia
`Austria
`Australia
`Barbados
`Belgium
`Burkina Faso
`Bulgaria
`Benin
`Brazil
`Belarus
`Canada
`Central African Republic
`Congo
`Switzerland
`C6te d'Ivoire
`Cameroon
`China
`Czechoslovakia
`Czech Republic
`Germany
`Denmark
`Estonia
`Spain
`Finland
`France
`Gabon
`
`GB
`GE
`GN
`GR
`HU
`IE
`IT
`JP
`KE
`KG
`KP
`
`KR
`KZ
`U
`LK
`LR
`LT
`LU
`LV
`MC
`MD
`MG
`ML
`MN
`MR
`
`United Kingdom
`Georgia
`Guinea
`Greece
`Hungary
`Ireland
`Italy
`Japan
`Kenya
`Kyrgystan
`Democratic People's Republic
`of Korea
`Republic of Korea
`Kazakhstan
`Liechtenstein
`Sri Lanka
`Liberia
`Lithuania
`Luxembourg
`Latvia
`Monaco
`Republic of Moldova
`Madagascar
`Mali
`Mongolia
`Mauritania
`
`MW
`MX
`NE
`NL
`NO
`NZ
`PL
`PT
`RO
`RU
`SD
`SE
`SG
`SI
`SK
`SN
`sz
`TD
`TG
`TJ
`TT
`UA
`UG
`US
`UZ
`VN
`
`Malawi
`Mexico
`Niger
`Netherlands
`Norway
`New Zealand
`Poland
`Portugal
`Romania
`Russian Federation
`Sudan
`Sweden
`Singapore
`Slovenia
`Slovakia
`Senegal
`Swaziland
`Chad
`Togo
`Tajikistan
`Trinidad and Tobago
`Ukraine
`Uganda
`United States of America
`Uzbekistan
`Viet Nam
`
`

`

`Case 5:19-cv-00036-RWS Document 379-5 Filed 07/02/20 Page 4 of 33 PageID #: 17911
`
`APL-MAXELL_00719232
`
`WO 96/27974
`
`PCT/EP96/01100
`
`1
`
`Title
`
`5
`
`10
`
`15
`
`20
`
`25
`
`30
`
`35
`
`A TELEPHONE SET HAVING CALLING PARTY DEPENDENT RINGING
`
`Field of the Invention
`
`The present invention relates generally to telecom­
`munications terminal devices comprising ringing means and,
`more particulary, to telephone sets comprising ringing devices
`capable of providing a variety of distinctive ringing or
`alerting sounds for information purposes.
`
`Background of the Invention
`
`Conventional wired and wireless telephone sets include
`ring tone generator means of an electro-mechanical or
`electronic type. The ring tone generator means are either
`directly actuated by a separate ring signal provided by a
`public or private telephone network to which the telephone set
`is connected, or indirectly, via an actuation circuit in the
`telephone set itself, which circuit is triggered by call
`arriving data obtained from signalling information provided
`by the telephone network.
`
`A plurality of such ring tone devices are already known.
`European Patent Application 0,203,394 discloses an electronic
`music/voice ringer circuit for use in telephone sets. The
`circuit can be connected directly to the telephone network
`line providing a series of intermittent ring pulses. The
`circuit converts these ring pulses into continuous music
`ringing signals or voice ringing signals. The piece of music
`or voice signals to be reproduced are pre-stored.
`
`British Patent Application 2,220,822 discloses a
`telephone set providing the user of the set with the
`possibility of recording various sounds in a recording and
`reproducing unit, such that the telephone can have a
`
`

`

`Case 5:19-cv-00036-RWS Document 379-5 Filed 07/02/20 Page 5 of 33 PageID #: 17912
`
`APL-MAXELL_00719233
`
`WO 96/27974
`
`PCT/EP96/01100
`
`2
`
`distinctive ringing sound, e.g. among a number of adjacent
`telephones.
`
`5
`
`10
`
`15
`
`20
`
`25
`
`30
`
`35
`
`US Patent 4,866,766 discloses a telephone device having
`a customized ring capability. The telephone set comprises a
`user programmable ring tone generator. A ringing sound has to
`be stored in dedicated memory means by inputting from the
`dialling keypad of the telephone set coded ring parameters.
`On receipt of a ring signal from the telephone switching
`network, the ring parameters are activated from the memory
`means to produce an audible ring pattern and ring tone.
`
`European Patent Application 0,604,081 discloses a ring
`tone device for creating a ringing sound in accordance with
`data, such as the subscriber number or any other
`identification number unique to the telephone set. The ring
`tone device comprises a user programmable ring tone parameter
`memory for storing a ring tone sequence defining a particular
`ringing sound.
`
`These known ring tone devices are limited to the extend
`that they can only produce distinct ringing or alerting sounds
`to distinguish one's own telephone among a plurality of
`adjacent telephones. However, in some telecommunication
`systems a number of users share the same telephone device.
`
`US Patent 5,073,922 and International Patent Application
`9,107,041 disclose telecommunications arrangements comprising
`ring tone means for identifying a specific user to receive a
`call on a telephone terminal device which is shared by a
`number of users and/or to distinguish a particular terminal
`device among a plurality of terminal devices connected to the
`same subscriber line. Each user and/or terminal is assigned
`a specific ring tone signal stored in a memory of the terminal
`device. The calling party has to dial the telephone number of
`the telephone device as well as an additional number to
`identify that the call is for a particular person and/or
`terminal.
`
`

`

`Case 5:19-cv-00036-RWS Document 379-5 Filed 07/02/20 Page 6 of 33 PageID #: 17913
`
`APL-MAXELL_00719234
`
`WO 96/27974
`
`PCT/EP96/01100
`
`3
`
`US Patent 5,001,709 discloses a ring tone arrangement for
`providing different ringing tones for a speech or verbal call
`and a data call in an ISDN system.
`
`5
`
`10
`
`15
`
`20
`
`25
`
`30
`
`35
`
`The use of these known "personalized" ringing tone
`arrangements is, however, limited to telecommunications
`systems having a signalling system capable of transferring the
`required additional identification data.
`
`European Patent Application 0,416,803 provides a method
`and an apparatus to enable a user to determine whether he or
`she is the intended recipient of an incoming call and the type
`of call. To this end, the ring signal is divided into two
`segments. The first segment is used for personalized ring
`tones, i.e. identifying the called party, and the second
`segment is used for indicating the type of call, i.e.
`internal, external, priority call etc.
`
`The feature of priority ringing includes the so-called
`calling party identification ringing. That is, for a limited
`number of calling party identification numbers, stored in a
`memory of the telephone apparatus, a unique ringing sound can
`be produced for calls arriving from such prioritized parties.
`
`Canadian Patent Application 2,105,543 and Japanese Patent
`Application JP 60-128,294 disclose telephone terminal devices
`having ringing tone means for selectively alerting the user
`of a telephone device to incoming calls in accordance with a
`programmed allocation of caller identification numbers and/or
`categories of incoming calls (business, family, etc.). In a
`preferred embodiment, the typical telephone system calling
`number identification signal (A-number) is used for this
`purpose.
`
`This feature provides the user of a telephone terminal
`information about the calling party, even before the call has
`been answered which is, for example, advantageous in case of
`meetings and the like. The user of the telephone set can
`
`

`

`Case 5:19-cv-00036-RWS Document 379-5 Filed 07/02/20 Page 7 of 33 PageID #: 17914
`
`APL-MAXELL_00719235
`
`WO 96/27974
`
`PCT/EP96/01100
`
`4
`
`simply discriminate an allowed phone call, for example
`originated by a party providing additional information to the
`user during the meeting or a special caller, such as a
`secretary, by the ringing sound produced and can respond to
`such call by going off hook. However, in case of other
`arriving telephone calls, which again can be determined from
`listening to the ringing sound, the user can respond to the
`call by clearing the ring signal and not going off hook, for
`example. In some types of modern telephone sets this requires
`just the pressing of a single key or button. The user can
`also, for example, respond by transferring the call to a
`predefined other user, such as a secretary, which again may
`just require the actuation of a single key.
`
`The above prior art telecommunications devices are only
`capable of providing calling party dependent ringing upon
`receipt of call arrival data from the switching network which
`matches limited user identification data pre-stored in a
`memory or other registration means of the telecommunications
`device.
`
`Summary of the Invention
`
`It would be an advantage to have a telecommunications
`terminal, such as a wired or wireless telephone set, capable
`of providing the user of such device a variety of distinctive
`ringing sounds not necessarily requiring special or dedicated
`memory means for pre-storing user identification data or
`requiring relevant programming by the user of the telephone
`set.
`
`Accordingly, it is an object of the present invention to
`provide a telecommunications terminal device having ringing
`sound alerting capabilities providing the user of the device
`information relating to, for example, a calling party, special
`calls like emergency calls, voice message call, paging message
`call etc., not limited to the number of stored identification
`data in the terminal device or the network to which the
`
`5
`
`10
`
`15
`
`20
`
`25
`
`30
`
`35
`
`

`

`Case 5:19-cv-00036-RWS Document 379-5 Filed 07/02/20 Page 8 of 33 PageID #: 17915
`
`APL-MAXELL_00719236
`
`WO 96/27974
`
`PCT/EP96/01100
`
`terminal is connected.
`
`5
`
`5
`
`10
`
`15
`
`20
`
`25
`
`30
`
`35
`
`It is also an object of the present invention to provide
`a telecommunications terminal device having easy to programm
`ringing sound capabilities, providing a wide variety of
`ringing or alerting sounds.
`
`These and other objects, advantages and features of the
`present invention are provided by a telecommunications
`terminal device such as a telephone set, in particular a radio
`telephone set, having ring generator means for producing a
`ringing sound in accordance with signalling information
`received by the terminal device and relating to the identity
`of a calling party. The ring generator means are, following
`the invention, arranged for producing a ringing sound from the
`calling party identity data provided by the signalling
`information.
`
`Thus, in case of the arrival of a call, the present
`invention provides the user of the terminal device with a ring
`signal relating to the identity of the calling party, however
`without the need of retrieving ring signal data relating to
`the calling party's identity from dedicated memory means.
`Accordingly, the calling party dependent ringing of the
`terminal device according to the present invention is
`essentially not limited to the available memory space for
`storing ring signal parameters or the like.
`
`This is an advantage for wireless or cordless terminal
`devices, such as telephone handsets, in which mounting space
`for electronic components and battery power are normally
`scarce.
`
`With the present invention, after listening once or a few
`produced when a party is calling,
`the ringing sound
`times to
`device can simply identify such
`of the terminal
`the user
`ringing sound produced. This
`party from the
`calling
`support the user's decision how to
`information can be used to
`
`

`

`Case 5:19-cv-00036-RWS Document 379-5 Filed 07/02/20 Page 9 of 33 PageID #: 17916
`
`APL-MAXELL_00719237
`
`WO 96/27974
`
`PCT/EP96/01100
`
`6
`
`respond to the call. The device according to the invention is
`very easy to use, essentially requiring no memory updates or
`the like.
`
`5
`
`In a further embodiment of the invention, the data used
`for producing the ringing sound may be distinctive for a group
`of calling parties, e.g. users from different company sites.
`
`10
`
`15
`
`20
`
`25
`
`30
`
`35
`
`Telecommunication networks, in particular private
`telephone networks, can provide a terminal device with
`different ring signals, in order to distinguish between the
`type of call, such as an emergency call, internal/external
`originated call, call back ringing etc. and/or the type of
`communication service, such as call forwarding, data call etc.
`In a yet further embodiment of the invention, the ring
`generator means are in addition responsive to generate a
`respective ringing sound from such data.
`
`There are a plurality of manners in which the type of
`call or type of communication service can be made audible. The
`corresponding ringing sound can be produced directly after the
`ringing sound indicating the calling party identity, or as a
`(short) preamble to the calling party identity ringing, for
`example. A combination of sounds, such as a special modulation
`of the calling party ringing sound is also a possibility.
`
`In its simplest embodiment, the ringing sound is directly
`produced from the respective received signalling information
`data. However, there is wide variety in how to produce a
`ringing tone. For example, such that each digit of a received
`calling party number (A-number) represents a tone of a
`particular height and duration. However, it is also possible
`to allocate different durations to the tones or to allocate
`silence to some of the digits. Even the strength of the tone
`can be different amongst received digits etc.
`
`Those skilled in the art will appreciate that with such
`a wide variety of ringing tones it is possible to essentially
`
`

`

`Case 5:19-cv-00036-RWS Document 379-5 Filed 07/02/20 Page 10 of 33 PageID #: 17917
`
`APL-MAXELL_00719238
`
`WO 96/27974
`
`PCT/EP96/01100
`
`7
`
`provide to each terminal device a unique manner of how to
`produce the ringing sound. Thus making it possible to
`distinguish terminal devices by their own specific ringing.
`
`5
`
`10
`
`15
`
`20
`
`25
`
`30
`
`35
`
`However, users of a terminal device may require an option
`of having a personal or customized ringing sound, for example
`associated with a particular calling party or a group of
`calling parties. Accordingly, in a further embodiment of the
`invention the terminal device comprises processing means for
`processing data provided by the signalling information in
`accordance with a processing algorithm stored in the terminal
`device. The ring generator means are arranged for producing
`a ringing sound from these processed data.
`
`Dependent on the user requirements and/or the signalling
`information available, for example, several processing
`algorithms may be automatically selected by the terminal
`device to provide a specific and informative ringing. The
`processing algorithms may be pre-stored as software data by
`the manufacturer of the terminal device, or may be
`programmable by the user, for example using keyboard means of
`the terminal device.
`
`In order to save memory space and processing power, the
`processing of signalling information and/or the processing
`algorithms can be also installed hard wired, i.e. by suitable
`electronic circuitry. The selection of a particular processing
`algorithm can be provided by switching means or automatically
`by the telephone set itself when it is used for the first
`time, for example. Other additionally provided data may be
`used for generating a customized ringing sound too.
`
`To date there are quite a number of public and private
`telephone networks which, for the time being, have no
`provision of signalling information containing calling party
`identity etc. Accordingly, in an embodiment of the invention,
`for producing a ringing sound in the absence of signalling
`information identifying either one or both the calling party
`
`

`

`Case 5:19-cv-00036-RWS Document 379-5 Filed 07/02/20 Page 11 of 33 PageID #: 17918
`
`APL-MAXELL_00719239
`
`WO 96/27974
`
`PCT/EP96/01100
`
`8
`
`identity and group identity, type of call and type of
`communication service, the ringing sound is produced using
`default data stored in the terminal device. These data may be
`common to each terminal device and each type of information,
`i.e. calling party identity, type of call, type of telephone
`service, or customized as described above.
`
`Although the invention provides essential unlimited
`calling party dependent ringing, users may require for a
`limited number of calling parties recognizable or very special
`ringing sounds, for example sweet tunes for relatives and
`dissonant tunes for rivals or the like. Accordingly, in a yet
`further embodiment of the invention the telephone set
`comprises memory means responsive to processing means for
`retrieving data associated with data obtained from the
`signalling information. Such that a ringing sound is produced
`using these retrieved data, in particular data relating to the
`calling party and one or more groups of calling parties,
`stored in a first part of the memory means.
`
`Accordingly, based on the signalling information, the
`memory means are first interrogated for personal or customized
`ringing sound data relevant to the type of signalling
`information obtained. If no such data is found, a ringing
`sound produced from the received data will be provided.
`
`In order to limit the memory requirements and processing
`power for the interrogation of the memory means, there may be
`provided a combination of personal and general ringing sound
`data, the latter being obtained from the signalling
`information, either directly or through a (selected)
`processing algorithm, for example. With such an embodiment,
`the user of a terminal device and/or the operator of a
`telecommunications network are provided with a tremendous
`freedom of customized ringing.
`
`To achieve an optimum freedom of ringing sound selection,
`in an embodiment of the invention the terminal device is
`
`5
`
`10
`
`15
`
`20
`
`25
`
`30
`
`35
`
`

`

`Case 5:19-cv-00036-RWS Document 379-5 Filed 07/02/20 Page 12 of 33 PageID #: 17919
`
`APL-MAXELL_00719240
`
`WO 96/27974
`
`PCT/EP96/01100
`
`9
`
`provided with selection means for selecting a ringing sound
`produced of either one of the calling party and group identity
`data provided by the signalling information, a processing
`algorithm stored in the terminal device and data stored at the
`memory means. This selection may be made by default or in a
`predetermined or non-alterable manner by the manufacturer of
`the terminal device or the operator of a telecommunications
`network with which the terminal device is associated. In
`general, customized ringing may be implemented providing a
`similar device as the well known SIM-card.
`
`The ring generator means of the telephone set according
`to the present invention may be either one of a group of
`synthesized voice, recorded voice, synthesized music, recorded
`music, single tone and multiple tone producing means.
`
`Particularly in large networks, it may be difficult to
`distinguish between different music or audio ringing sounds
`uniquely identifying the calling party. In such case another
`embodiment of the invention is very advantageously, in which
`the ringing sound takes the form of a voice signal outputting
`the name of the calling party or the type of call, for
`example. The voice producing means may be arranged such to
`produce a voice ringing sound corresponding to the voice of
`the calling party. To this end, use can be made of speech
`coding and decoding means already present in modern digital
`telephone sets, such as operating in accordance with digital
`cordless and/or digital cellular mobile communication systems.
`
`The invention further relates to a method of generating
`a ringing sound in a telecommunications device such as a
`telephone set, in particular a radio telephone set having ring
`generator means for producing a ringing sound in accordance
`with signalling information received by the terminal device
`and relating to the identity of a calling party. The method
`comprising the steps of obtaining data from the signalling
`information relevant to the identity of the calling party,
`transferring these data to the ring generator means for
`
`5
`
`10
`
`15
`
`20
`
`25
`
`30
`
`35
`
`

`

`Case 5:19-cv-00036-RWS Document 379-5 Filed 07/02/20 Page 13 of 33 PageID #: 17920
`
`APL-MAXELL_00719241
`
`WO 96/27974
`
`PCT/EP96/0U00
`
`10
`
`producing a ring signal from these data, and actuating the
`ring generator means using this ring signal in order to
`produce a ringing sound.
`
`5
`
`In further embodiments of the method according to the
`invention, data transferred to the ring generator means may
`relate to other received signalling information, may be pre-
`processed according to a processing algorithm, may be
`retrieved from a memory, or default data, either user
`10 programmable or pre-stored.
`
`It has been found that the number of tones including
`semitones of a single music octave is equal to the number of
`keys of a conventional dialling telephone keypad, i.e. the ten
`15 numeric or digit keys (0-9) and the two keys
`and
`respectively. Accordingly, for producing a customized ringing
`sound, in particular a piece of music, in a further embodiment
`of the method according to the invention each key of the
`keypad represents a particular tone of a single octave. By
`20 additionally assigning to each key a duration and/or octave
`number of a particular tone, every piece of music can be
`stored into the memory means.
`
`The above-mentioned and other features and advantageous
`25 of the invention are illustrated in the following description
`with reference to the enclosed drawings.
`
`Brief Description of the Drawings
`
`30
`
`Fig. 1 shows, in a schematic and illustrative manner, a
`digital data stream comprising data bursts of a digital radio
`telecommunication system.
`
`Fig. 2 shows a simplified block diagram of a radio
`35 telephone set operating according to the present invention.
`
`Fig. 3 shows a flow chart illustrating the ringing
`operation of the telephone set of Fig. 2.
`
`

`

`Case 5:19-cv-00036-RWS Document 379-5 Filed 07/02/20 Page 14 of 33 PageID #: 17921
`
`APL-MAXELL_00719242
`
`WO 96/27974
`
`PCT/EP96/01100
`
`11
`
`Fig. 4 shows a block diagram of a further embodiment of
`the telephone set of Fig. 2.
`
`5
`
`10
`
`15
`
`20
`
`25
`
`30
`
`35
`
`Fig. 5 shows, in a schematic and illustrative manner, a
`conventional keypad for use in a telephone set.
`
`Detailed Description of the Embodiments
`
`Without the intention of a limitation, the invention will
`now be explained by an embodiment of a telephone set for use
`with digital cordless communication systems designated CT2,
`CT2-CAI, CT3 and DECT (Digital Enhanced Cordless
`Telecommunications) and/or digital cellular communication
`systems designated IS-54B in North America and the pan­
`European GSM networks.
`
`DECT is a mandatory standard for digital cordless radio
`telecommunication systems, i.e. for use in business
`environments such as offices and in residential areas, such
`as Radio in the Local Loop (RLL) and Cordless Terminal
`Mobility (CTM) applications. DECT uses a Multi-Carrier
`(MC) /Time Division Multiple Access (TDMA) /Time Division Duplex
`(TDD) format for radio communication between the remote units
`such as cordless telephone sets and base-stations connected
`to a public or private switching network. With DECT, ten radio
`carriers are available. Each carrier is divided in the time
`domain into twenty-four 'time-slots'. Two time-slots are used
`to create a duplex speech channel, effectively resulting in
`twelve available speech channels at any of the ten radio
`carriers. The twenty-four time slots are transmitted in so-
`called TDMA frames having a frame cycle time TF of 10 ms.
`
`A typical frame structure for a digital TDMA/TDD
`communication system is shown in Fig. 1. During the first
`halve of the frame, i.e. the first twelve time-slots
`• . . R12, data from the base station are
`designated Rl, R2,
`received by the telephone set, whereas in the second halve of
`each frame, i.e. the second twelve time-slots designated Tl,
`
`

`

`Case 5:19-cv-00036-RWS Document 379-5 Filed 07/02/20 Page 15 of 33 PageID #: 17922
`
`APL-MAXELL_00719243
`
`WO 96/27974
`
`PCT/EP96/01100
`
`12
`
`T2,
`... T12, the telephone set transmits data to the base
`station. A radio connection between a base station and a
`telephone set is assigned a slot in the first halve of the
`frame and a slot bearing the same number in the second halve
`5 of the frame. Each time-slot typically contains
`synchronization data, control data and digitized speech or
`user data.
`
`Signalling information, such as data referring to the
`10 calling party, the type of call, the type of service and ring
`signals may be included in both the control data and the
`speech or user data. Reference is made to International Patent
`Application WO 94/06254 by Ericsson Business Mobile Networks
`B.V.
`
`15
`
`Fig. 2 shows a simplified block diagram of a radio
`telephone set 1, having four essential building blocks, i.e.
`a central control and application logic unit 2, a radio unit
`3, a timing and synchronisation control unit 4 and a speech
`20 processing unit 5.
`
`The radio unit 3 comprises an air interface in the form
`of an antenna 6 coupled to a transceiver unit comprising a
`transmitter/modulator and a receiver/demodulator. Transmission
`25 and reception timing is controlled by the timing control unit
`4. In case of TDMA/TDD technology this timing control unit 4
`controls, among others, frame and time slot synchronisation.
`Timing reference is either internally generated or derived
`from a synchronisation signal received over the antenna 6.
`
`30
`
`The central control unit 2, receives data from the radio
`unit 3. Signalling and synchronisation information are removed
`from the received data and received speech data is fed to the
`speech processing unit 5. The speech processing unit 5, among
`35 others, takes care of the deciphering of received data. A
`codec 7 decodes the received digitized speech data into analog
`form for making it audible to a user of the handset via a
`loudspeaker 8 connected to the codec 7.
`
`

`

`Case 5:19-cv-00036-RWS Document 379-5 Filed 07/02/20 Page 16 of 33 PageID #: 17923
`
`APL-MAXELL_00719244
`
`WO 96/27974
`
`PCT/EP96/01100
`
`13
`
`Speech produced by the user is received by a microphone
`9 and encoded into a suitable digital format by the codec 7.
`This encoded speech data is fed to the speech processing unit
`5 which, among others, takes care of encryption of the speech
`data. The central control unit 2 adds suitable synchronisation
`and signalling information to the encrypted speech data. The
`radio unit 3 transmits this signalling and speech data via the
`antenna 6 for reception by a base station (not shown) of the
`communication system to which the telephone set 1 is
`
`5
`
`10
`
`connected.
`
`15
`
`20
`
`25
`
`30
`
`35
`
`In case of a multi-carrier multi-time-slot technology,
`such as DECT, the central control unit controls also the
`various combinations of carrier frequencies and time-slots.
`
`Further, the telephone set 1 comprises a keypad 10 and
`a display 11, both connected to the central control unit 2,
`for control of the telephone by a user.
`
`The central control unit 2 detects incoming calls and
`controls outgoing calls. The arrival of a call is detected
`from the suitable signalling information in the control and/or
`user data field of the arriving data frames. At the detection
`of the arrival of a call, ring generator means 12 are actuated
`from the central control unit 2 for producing a ringing or
`alerting sound by a buzzer 13 and, optionally, a visual
`alerting signal emitted by a lamp or Light Emitting Diode
`(LED) 14. For the overall powering of the telephone set 1, a
`battery unit 15 is included.
`
`According to the present invention, the central control
`logic unit 2 is arranged for processing the received
`signalling information, such to form a ring signal for
`actuating the ring generator means 12 to produce a ringing
`sound dependent on the identity of the calling party. This
`arrangement is schematically indicated with reference numeral
`16. Note that this arrangement 16 may be integral to the
`central control unit 2 and/or the ring generator means 12 and
`
`

`

`Case 5:19-cv-00036-RWS Document 379-5 Filed 07/02/20 Page 17 of 33 PageID #: 17924
`
`APL-MAXELL_00719245
`
`WO 96/27974
`
`PCT/EP9 6/01100
`
`14
`
`may be provided with means for storing default data for
`producing a ring signal in the case of absence of relevant
`signalling information.
`
`5
`
`Fig. 3 shows a flow chart diagram illustrating a direct
`ringing embodiment of the present invention. It is assumed
`that the telephone set is in operation, i.e. switched to its
`idle state, such that start up and initialisation routines
`have been executed. In this flow chart diagram it is assumed
`10 that the flow direction is from the top of the chart to the
`bottom thereof. Any flow other than the assumed direction is
`indicated with an upwardly directed arrow.
`
`The flow chart starts at block 21 "CALL DETECTED", where
`15 the central control unit 2 is waiting for an incoming call,
`i.e. block 21 decision "NO". When a call arrives, i.e. block
`21 "YES", signalling information relevant to the present
`invention is retrieved at block 22 "RETRIEVE SIGNALLING
`INFORMATION". Relevant signalling information includes data
`20 as to the identity of the calling party and, optionally, data
`indicating the type of call e.g. external/internal/call back,
`data indicating the type of telephone service and any other
`data which could be relevant for a user to be informed of in
`supporting his decision how the call should be answered
`25 (picking up the phone, transfer of the call etc.).
`
`At block 23 the signalling information is processed as
`to the identity of the calling party, "CALLING PARTY ID". If
`no identity data is available, block 23 "NO", default identity
`30 data can be retrieved at block 24 "DEFAULT DATA". If identity
`data is available, the decision in block 23 will be "YES".
`Other relevant signalling information such as data to the type
`of call, i.e. external, internal, call back etc. as described
`above, can be fetched at block 26 "RETRIEVE OTHER RELEVANT
`35