CA2154318A1 - Adaptable radio telephone handset - Google Patents

Adaptable radio telephone handset


Publication number
CA2154318A1 CA 2154318 CA2154318A CA2154318A1 CA 2154318 A1 CA2154318 A1 CA 2154318A1 CA 2154318 CA2154318 CA 2154318 CA 2154318 A CA2154318 A CA 2154318A CA 2154318 A1 CA2154318 A1 CA 2154318A1
Grant status
Patent type
Prior art keywords
communication device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Application number
CA 2154318
Other languages
French (fr)
Richard David Poole
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Motorola Solutions Inc
Original Assignee
Motorola Solutions Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date



    • H04W8/00Network data management
    • H04W8/18Processing of user or subscriber data, e.g. subscribed services, user preferences or user profiles; Transfer of user or subscriber data
    • H04W8/183Processing at user equipment or user record carrier
    • H04M1/00Substation equipment, e.g. for use by subscribers; Analogous equipment at exchanges
    • H04M1/02Constructional features of telephone sets
    • H04M1/0202Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
    • H04M1/0254Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets comprising one or a plurality of mechanically detachable modules
    • H04M1/00Substation equipment, e.g. for use by subscribers; Analogous equipment at exchanges
    • H04M1/72Substation extension arrangements; Cordless telephones, i.e. devices for establishing wireless links to base stations without route selecting
    • H04M1/725Cordless telephones
    • H04M1/72519Portable communication terminals with improved user interface to control a main telephone operation mode or to indicate the communication status


An adaptable radio telephone handset (100) accommodates multiple modules (116, 118) containing independent protocols in order to provide access to multiple communication systems.



Technic?l Field This invention relates to communication devices, and more specifically to portable communication devices.

R~cl~round With the ever increasing popularity of personal communication devices, such as cordless telephone and cellular telephone handsets, a higher priority is being placed upon designing these devices in lightweight and compact forms that are readily portable. While a user may enjoy the 15 portability of these devices, he may still require carrying several devices at the same time in order to have two-way voice communication in different geographic locations that use di~rel t communication protocol syslellls.
Having to carry separate handsets for independent protocol systems, each having a separate user interface, can become cumbersome for the user.
20 Furthermore, these devices typically require separate accessories, such as chargers, battery packs, and carrying cases, which create additional inconvenience for the user when mobile. The alternate choice for a potential user is to lock into a specific protocol system package which may not fit all of his requirements. Likewise, when a user upgrades to a new 25 system, he has to re-program the new phone with his commonly used phone numbers and learn a new interface (i.e., how to operate the new phone).
` Current implementations of cellular and the planned implementations of Personal Communication Systems (PCS) portable 30 telephones have been either single protocol or dual-mode protocol, however both protocols are hard encoded into the telephone handset.
Subscriber Information Module (SIM) cards for Global System for Mobile communications (GSM), a European protocol system, currently provide subscriber information (e.g. subscriber phone number, service 35 provider) and plug into a GSM phone to configure the phone for that 2~5~318 .

subscriber. However, these cards only re~erence the subscriber data and do not include radio frequency (RF) circuitry or protocol information.
Hence, there is a need for a single portable communication device that can incorporate multiple communication protocols and provide a 5 - common user interface.

Brief Description of the Drawin~

FIG. 1 is a drawing illustrating a portable communication device in 10 accordance with the present invention.
FIG. 2 is an electrical block diagram of the intemal electronics associated with the portable communication device in accordance with the present invention.
FIG. 3 is an electrical block diagram of a module in accordance with 15 the present invention.

Detailed Description of the Preferled Embodiment Referring now to FIG. 1 there is shown a portable communication 20 device, or adaptable radio telephone handset, 100 in accordance with the present invention. Included in the handset 100 are housing 102, display 104, keypad 106, speaker 108, microphone 110, and antenna 112.
Insertable/removable modules 116 and 118, each containing radio controller and radio frequency (RF) functions related to separate 25 communication protocol systems, are shown extemal to the handset 100.
These modules 116, 118 can be inserted into the handset 100 through aperture 114 to mate up with electronic circuitry (to be described later) within the housing 102. Interconnects 126, 128, located within each mod~lle 116, 118, provide electrical interconnect to mate up with the 30 intemal circuitry of the handset 100. When more than one module is inserted into the handset 100, a primary slot 122, and secondary slot 124 are defined within the handset 100. In FIG. 1, the primary slot 122 is being used to accommodate module 116 while the secondary slot 124 accommodates the second module 118, however these modules could be 35 interchanged to the opposite slot if desired.

215~318 Each module 116, 118 contains protocol specific hardware and software related to the protocol it was designed for. Once inserted into the handset 100, the modules 116, 118 provide independent communication protocols with which to access separate communication systems. The handset 100 can be programme-l for single or multiple identification numbers. The handset 100 provides a common user interface through the keypad 106 and display 104 regardless of the communication protocol being used. User specific information, such as frequently dialed numbers/names and lock codes, can be programmed into the handset 100 by the user. This user specific information can be programmed into the handset regardless of whether or not a module is inserted. Battery compartment 120 supplies power to the internal electrical circuits of the handset 100 as well as those of the modules 116, 118. All of the modules and internal circuitry operate at preferably 3.0V DC. Thus, a common battery charger and common battery pack can be used regardless of the protocol to which the handset 100 is configured.
As an example of user operation, the user can program the handset 100 with user specific information, such as lock codes and frequently dialed numbers, without any modules inserted. The user then inserts a module, such as a 1900 megahertz (MHz) Personal Access Communication Systems (PACS)-Time Division Multiple Access (TDMA) module, into the primary slot 122. A second module, such as an 800 MHz Advanced Mobile Phone System (AMPS) module, can be inserted into the secondary slot 124.
The user specific information is automatically downloaded or otherwise made available to both modules. The handset initially establishes communication using the primary slot, in this case the 1900MHz PACS-TDMA system. The secondary slot 124 becomes automatically available to take over when the primary system is not functioning, for example if the handset is out of range of the primary system. Alternatively, the user can use a keypad command to change from one communication protocol to another in order to establish a communication link.
The modules 116, 118 are all standardized to a common size designed to fit into the slots 122, 124 of the handset 100. If the user moves -to an area that employs entirely different protocol ~y~Lems, he can manually change out the module(s) to accommodate another module or set of modules. For example a 1900MHz Code Division Multiple Access .

(CDMA) module could be inserted and used as the primary module and a 800MHz TDMA module could be inserted and used as the secondary module. Multiple modules can be carried by the user to provide access to multiple communication systems wherever he goes. When the presently 5 inserted module(s) do not cover a particular area, the user need simply change the module(s) when wanting to change protocols. By utilizing the adaptable radio telephone handset as described by the invention, the user may keep one communication device with one user interface as opposed to multiple handsets.
Referring now to FIG. 2 of the accompanying drawings there is shown an electrical block diagram of the internal circuitry associated with the handset in accordance with the present invention. Circuitry 200 is preferably included on a printed circuit board referred to as the common board and comprises a controller means including microprocessor 202 15 having associated memory and peripherals and a display driver 204. Bus lines 208 control the communication between the microprocessor 202 and the display driver 204 and also goes to a keypad/display interface 206, such as a flexible ~..lelco~ ect (flex). The keypad/display interface 206 provides the interconnect between the keypad 106 of the handset 100 and the microprocessor 202 as well as the display 104 and the display driver 204.
The user can program the handset 100 with user specific information via the keypad 106 and have it stored in microprocessor 202. This type of user specific information is stored and made available to any enabled module inserted within the handset 100.
Also included in the common board 200, is a module interface 212 that provides a standardized inlercolu.ect for receiving the modules 116, 118. Bus lines 210 download the programmed user specific information from the microprocessor 202 to the modules 116, 118 once inserted.
Information regarding the communication status of the inserted modules 116, 118 is also sent via bus lines 210 to the microprocessor 202 so that the microprocessor can control the switching between the two modules 116, 118. The microprocessor 202 plefeldbly keeps one module in a sleep mode while the other module is engaged in a communication link in order to conserve current drain.
The module interface 212 is ~refeldbly a dual head multi-contact, or multi-pin, connector designed to mate up to corresponding interconnects 126, 128 of the modules 116, 118 and provide electrical contact between the common board 200 and the inserted modules. Included in the connector are preferably two RF contacts that provide RF connections for the modules 116 and 118 with appropriate impedance. These RF contacts are prefelably brought out to separate RF paths 218, 220 on the common board 200, such that each path is associated with a different module. RF paths 218, 220 are ~re~,dbly coupled to an RF switch 216 under the control of microprocessor 202. The RF switch 216 switches in the RF path of the c~ enlly enabled module to an RF trace 214. Thus, only one RF path makes electrical interconnect to the RF trace 214 of the handset 100. The RF trace 214 inlercolulects to a tuning circuit 222, prererably under microprocessor control 202, that automatically controls the tuning of the antenna 112 to the a~ro~,iate frequency with ~E~ropriate matched impedance.
Referring now to FIG. 3 of the accompanying drawings there is shown an electrical block diagram 300 of the circuitry associated with one of the modules 116. A similar diagram would apply to the second module 118. Included in the module circuitry 300 is module interface 302 which includes corresponding mating contacts for providing the interconnect between the module and the interface 212 of the circuit 200. A
microprocessor 304 along with protocol/audio control circuitry 306 provide all of the protocol specific controls for a specific communication system. Control lines 312 transfer user specific information generated from the common board 200 to the microprocessor 304 as well as provide other controller functions to the rest of the module circuitry 300. Included in the module circuitry 300 is RF section 308 which further includes transmitter and receiver circuitry specific to the particular communication system and providing RF path 310 to the module interface 302.
~ Module interface 302 includes an RF interconnect for the RF path 310 of the module. The module interface 302 includes an RF contact capable of relaying an RF signal with a~ro~riate impedance matching through to the corresponding mating contact in the module interface 212 and on to its corresponding RF path 218 of the common board 200. The second module 118 includes a similar circuit for another specific protocol that can be inserted into the interface 212 and, when enabled, similarly _ -- 6 provide its RF path to the corresponding RF path 220 of common board 200.
By employing the adaptable radio telephone handset as described by the invention, users are able to retain the same user control interface as 5 well as the custom programming they defined for the operation of their handset. By incorporating different modules within the handset, a user is provided with access to multiple protocols and systems. Other types of communication protocols that could be implemented include, but are not limited to, 1900MHz Digital Cordless Telephone U. S. (DCTU), 900MHz 10 Total Access Communication System (TACS), and 1900MHz Digital European Cordless Telephone (DECT). While the preferred embodiment describes two modules inserted into the handset, one of reasonable skill in the art would be able to apply this invenffon to a handset designed to accommodate a larger number of modules. Common accessories, such as 15 a carrying case, battery packs, and battery charger, can be used with the handset as described by the invention, this adds up to a significant cost saving to the end user.
While the ~rere"ed embodiments of the invention have been illustrated and described, it will be clear that the invention is not so 20 limited. Numerous modifications, changes, variations, substitutions, and equivalents will occur to those skilled in the art without departing from the spirit and scope of the present invention as defined by the appended claims.

25 What is claimed is:

Claims (5)

1. A communication device comprising:
a housing including a speaker, a microphone, a keypad and a controller for programming user specific information into the communication device, the housing further including an aperture for accessing the interior of the housing; and first and second removable modules each providing independent radio frequency and communication protocols under the control of a common user interface.
2. A communication device as defined by claim 1 wherein the first and second removable modules are replaceable by third and fourth removable modules each providing radio frequency and communication protocols independent of the first and second removable modules and under control of the same common user interface.
3. A communication device as defined by claim 2 wherein the keypad and controller provide the common user interface for the independent communication protocols.
4. A communication device as defined by claim 1, wherein each of the first and second removable modules further comprises:
protocol control circuitry for providing a communication protocol;
and receiver and transmitting circuitry for receiving and transmitting a radio frequency (RF) signal.
5. A communication device as defined by claim 4 further comprising a switch for controlling the path of the RF signal.
CA 2154318 1994-08-25 1995-07-20 Adaptable radio telephone handset Abandoned CA2154318A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US29556294 true 1994-08-25 1994-08-25
US08/295,562 1994-08-25

Publications (1)

Publication Number Publication Date
CA2154318A1 true true CA2154318A1 (en) 1996-02-26



Family Applications (1)

Application Number Title Priority Date Filing Date
CA 2154318 Abandoned CA2154318A1 (en) 1994-08-25 1995-07-20 Adaptable radio telephone handset

Country Status (6)

Country Link
JP (1) JPH0879344A (en)
CN (1) CN1122994A (en)
CA (1) CA2154318A1 (en)
DE (1) DE19526730A1 (en)
FR (1) FR2724086B1 (en)
GB (1) GB2292653B (en)

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Also Published As

Publication number Publication date Type
DE19526730A1 (en) 1996-02-29 application
JPH0879344A (en) 1996-03-22 application
GB2292653A (en) 1996-02-28 application
GB2292653B (en) 1999-01-13 grant
FR2724086A1 (en) 1996-03-01 application
GB9515342D0 (en) 1995-09-20 grant
CN1122994A (en) 1996-05-22 application
FR2724086B1 (en) 1999-07-23 grant

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