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Mobile Phone Patent Abstract
A battery charging apparatus enables a mobile phone to be used not
only for its own use but also as a cordless telephone. The battery
charging apparatus includes a telephone section and a Bluetooth
section. The telephone section is connected between a public network
and the Bluetooth section so as to interface an incoming call from
the public network to the combined cordless/mobile phone through
the Bluetooth section and to interface a call oriented from the
combined cordless/mobile phone to the public network through the
Bluetooth section. The Bluetooth section is connected between the
telephone section and the combined cordless/mobile phone so as to
transmit and receive wireless data.
Mobile Phone Patent Claims
What is claimed is:
1. A battery charging apparatus for charging a battery of a combined
cordless/mobile phone, the battery charging apparatus comprising
a telephone section and a Bluetooth section, wherein: the telephone
section is connected between a public network and the Bluetooth
section so as to interface an incoming call from the public network
to the combined cordless/mobile phone through the Bluetooth section
and to interface a call oriented from the combined cordless/mobile
phone to the public network through the Bluetooth section; the Bluetooth
section is connected between the telephone section and the combined
cordless/mobile phone so as to transmit and receive wireless data;
and further wherein the telephone section includes a ring signal
detection circuit which is connected with a public network and which
detects a ring signal of a received call; an office line connection
circuit which interfaces a call command and an audio signal of a
telephone; and a CODEC which is connected between the Bluetooth
section and the office line connection circuit so as to convert
PCM data into analog voice and vice versa.
2. A battery charging apparatus as claimed in claim 1, wherein
the telephone section further comprises a key input section.
3. A battery charging apparatus as claimed in claim 1, wherein
the telephone section further comprises a speaker and a microphone.
4. A battery charging apparatus for charging a battery of a combined
cordless/mobile phone, the battery charging apparatus comprising
a telephone section and a Bluetooth section, wherein: the telephone
section is connected between a public network and the Bluetooth
section so as to interface an incoming call from the public network
to the combined cordless/mobile phone through the Bluetooth section
and to interface a call oriented from the combined cordless/mobile
phone to the public network through the Bluetooth section; and the
Bluetooth section is connected between the telephone section and
the combined cordless/mobile phone so as to transmit and receive
wireless data; and further wherein the Bluetooth section includes
a first control section controlling an operation of the Bluetooth
section; a memory storing a program for controlling the first control
section; a PCM interface circuit connected with the telephone section
so as to transmit and receive PCM data; an RF receiver/transmitter
connected with the first control section so as to transmit and receive
data through a Bluetooth antenna; and an antenna connected with
the RF receiver/transmitter so as to transmit and receive data through
RF wave.
5. A battery charging apparatus as claimed in claim 4, wherein
the first control section of the Bluetooth section controls a battery-charging
operation of the battery charging apparatus and an operation of
the telephone section.
6. A battery charging apparatus as claimed in claim 4, wherein
the telephone section comprises: a second control section controlling
an operation of the telephone section; a memory storing a program
for controlling the second control section; a ring signal detection
circuit which is connected with a public network and which detects
a ring signal of a received call; an office line connection circuit
which interfaces a call command and an audio signal of a telephone;
and a CODEC which is connected between the Bluetooth section and
the office line connection circuit so as to convert PCM data into
analog voice and vice versa.
7. A battery charging apparatus as claimed in claim 6, wherein
the CODEC of the telephone section and the PCM interface circuit
of the Bluetooth section interface voice in a PCM mode.
8. A battery charging apparatus as claimed in claim 6, wherein
the first control section of the Bluetooth section and the second
control section of the telephone section interface an HCI data packet.
9. A method of enabling a mobile phone to be used as a cordless
telephone by utilizing a battery charging apparatus, the battery
charging apparatus including a Bluetooth section, the battery charging
apparatus being connected with a public network through a cable
and with a combined cordless/mobile phone by wireless through a
Bluetooth communication so as to process calls, the method comprising
the steps of: detecting an incoming call from the public network;
interfacing a call command and an audio signal of a telephone through
an office line connection circuit; setting a Bluetooth connection
between the combined cordless/mobile phone and the battery charging
apparatus; outputting a ring signal to the combined cordless/mobile
phone; converting PCM data into analog voice and vice versa using
a CODEC connected between the Bluetooth section and the office line
connection circuit; and transmitting and receiving voice data through
the Bluetooth connection to thereby enable communication through
the combined cordless/mobile phone, when there is a response from
the combined cordless/mobile phone.
10. A method of enabling a mobile phone to be used as a cordless
telephone by utilizing a battery charging apparatus, the battery
charging apparatus including a Bluetooth section, the battery charging
apparatus being connected with a public network through a cable
and with a combined cordless/mobile phone by wireless through a
Bluetooth communication so as to process calls, the method comprising
the steps of: detecting a call from the combined cordless/mobile
phone to the public network; setting a Bluetooth connection when
there is a call from the combined cordless/mobile phone to the public
network; requesting the call to the public network; interfacing
a call command and an audio signal of a telephone with an office
line connection circuit; outputting a ring-back tone signal through
the combined cordless/mobile phone; converting PCM data into audio
voice and vice versa using a CODEC connected between the Bluetooth
section and the office line connection circuit; and transmitting
and receiving voice data through the Bluetooth connection to thereby
enable communication through the combined cordless/mobile phone,
when there is a response from the public network.
11. A method of enabling a mobile phone to be used as a cordless
telephone by utilizing a combined cordless/mobile phone, the combined
cordless/mobile phone being connected with a Bluetooth apparatus
by wireless through a Bluetooth communication so as to process calls,
the Bluetooth apparatus including a Bluetooth section and being
connected with a public network through a cable, the method comprising
the steps of: receiving an incoming call from the Bluetooth apparatus
to the public network; outputting a ring signal for the incoming
call; controlling operation of the Bluetooth section with a first
control section; storing a program in memory for controlling the
first control section; and transmitting and receiving voice data
through a Bluetooth connection to and from the public network, thereby
enabling communication through the combined cordless/mobile phone,
when there is a response from a user, wherein the transmitting and
receiving includes transmitting and receiving PCM data through a
PCM interface circuit connected with a telephone section; transmitting
and receiving data through a Bluetooth antenna through an RF receiver/transmitter
connected with the first control section; and transmitting and receiving
data through RF waves using an antenna connected with the RF receiver/transmitter.
12. A method of enabling a mobile phone to be used as a cordless
telephone by utilizing a combined cordless/mobile phone, the combined
cordless/mobile phone being connected with a Bluetooth apparatus
by wireless through a Bluetooth communication so as to process calls,
the Bluetooth apparatus including a Bluetooth section and being
connected with a public network through a cable, the method comprising
the steps of: transmitting a communication request message to the
Bluetooth apparatus when a user makes a phone call; outputting a
ring-back tone signal from the Bluetooth apparatus; controlling
operation of the Bluetooth section with a first control section;
storing a program in memory for controlling the first control section;
and transmitting and receiving voice data through the Bluetooth
connection to thereby enable communication through the combined
cordless/mobile phone, when there is a response from the public
network, wherein the transmitting and receiving includes transmitting
and receiving PCM data through a PCM interface circuit connected
with a telephone section; transmitting and receiving data through
a Bluetooth antenna through an RF receiver/transmitter connected
with the first control section; and transmitting and receiving data
through RF waves using an antenna connected with the RF receiver/transmitter.
Mobile Phone Patent Description
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a battery charging apparatus for
a mobile phone, and more particularly to a battery charging apparatus
having a Bluetooth module.
2. Description of the Related Art
In general, a mobile phone is used more frequently outdoors and
is used only in receiving a phone call indoors where a wire telephone
is provided. In other words, since a call charge for a mobile phone
is more expensive than a call charge for a usual wire telephone,
it may be rather burdensome for a user to use a mobile phone indoors
in place of a wire telephone when making a phone call.
However, although the call charge for a mobile phone is more expensive
than the call charge for a usual wire telephone, the mobile phone
may store many phone numbers and enable a user to search the stored
phone numbers and make a phone call to a stored phone number by
simply touching one or more keys. Therefore, due to the conveniences
as described above, some users often utilize the mobile phone indoors
also, instead of the wire telephone which requires the users to
manually dial the phone number one key by one key.
Meanwhile, recent mobile phones each contain a Bluetooth module,
so that a local area wireless communication can be made between
mobile phones. The Bluetooth is a standard for enabling a wireless
connection between mobile apparatuses such as portable PCs and mobile
phones in a narrow area at a low cost. The Bluetooth enables voice
and data to be exchanged without physical cables between various
digital communication apparatuses by utilizing a wireless frequency.
For example, the Bluetooth wireless technology may be realized in
a mobile phone and a lap top computer, enabling them to be connected
with each other without a cable. Also, in fact, all digital appliances
such as PDAs (personal digital assistants), desktop computers, facsimile
machines, keyboards, and joysticks can be a part of the Bluetooth
system.
That is, the Bluetooth enables various communication equipments
such as mobile phones, notebook computers, facsimile machines, and
MP3 players to be connected with each other through a wireless link.
Detail transmission standards proposed by the Bluetooth enable data
to be provided with security and protected from interference. Further,
Bluetooth systems may be manufactured in a form of small-sized microchip,
so that they can be incorporated in communication systems. Moreover,
the Bluetooth systems are so designed as to operate in a frequency
band of 2.4 GHz which is a worldwide compatible communication frequency
band. The Bluetooth standard provides two electric power levels.
Between them, the lower power level is an electric power level enough
to enable wireless communication only within a room, and the higher
power level is an electric power level enough to enable wireless
communication within an entire house.
SUMMARY OF THE INVENTION
Accordingly, the present invention has been made to solve the above-mentioned
problems occurring in the prior art, and an object of the present
invention is to provide an apparatus which has a construction modified
from a conventional desktop battery charging apparatus having been
utilized only in charging a battery of a mobile phone in the prior
art, so that the apparatus can be connected with a general wire
telephone network and a mobile phone having a Bluetooth module,
thereby enabling a mobile phone to be used not only for its own
use but also as a cordless telephone.
It is another object of the present invention to provide a method
which enables a mobile phone to be used not only for its own use
but also as a cordless telephone.
In order to accomplish this object, there is provided a battery
charging apparatus for charging a battery of a combined cordless/mobile
phone, the battery charging apparatus comprising a telephone section
and a Bluetooth section, wherein: the telephone section is connected
between a public network and the Bluetooth section so as to interface
an incoming call from the public network to the combined cordless/mobile
phone through the Bluetooth section and to interface a call oriented
from the combined cordless/mobile phone to the public network through
the Bluetooth section; and the Bluetooth section is connected between
the telephone section and the combined cordless/mobile phone so
as to transmit and receive wireless data.
BRIEF DESCRIPTION OF THE DRAWINGS
The above and other objects, features and advantages of the present
invention will be more apparent from the following detailed description
taken in conjunction with the accompanying drawings, in which:
FIG. 1 is a block diagram of a battery charging apparatus according
to the first embodiment of the present invention;
FIG. 2 is a block diagram of a battery charging apparatus according
to the second embodiment of the present invention;
FIG. 3 is a block diagram of a battery charging apparatus according
to the third embodiment of the present invention;
FIG. 4 is a diagram showing a message flow in a process of pairing
between a telephone gate and a combined cordless/mobile phone having
a Bluetooth module according to an embodiment of the present invention;
FIG. 5 is a flowchart of a process of registering a Bluetooth mobile
phone in a battery charging apparatus according to the present invention;
FIG. 6 is a flowchart of a call processing procedure in a battery
charging apparatus according to the present invention;
FIG. 7 is a flowchart of a call processing procedure in the case
where the user responds to the incoming call through the Bluetooth
mobile phone;
FIG. 8 is a flowchart of a call processing procedure in the case
where the user responds to the incoming call through the wire telephone;
FIG. 9 is a flowchart of an operation of a Bluetooth mobile phone
in a cordless telephone mode according to the present invention;
and
FIG. 10 is a flowchart of an operation of a Bluetooth mobile phone
according to the present invention in the case where the Bluetooth
mobile phone originates a call through a public network.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
Hereinafter, preferred embodiments of the present invention will
be described with reference to the accompanying drawings. In the
following description of the present invention, a detailed description
of known functions and configurations incorporated herein will be
omitted when it may make the subject matter of the present invention
rather unclear.
FIG. 1 is a block diagram of a battery charging apparatus according
to the first embodiment of the present invention.
A battery charging apparatus according to the first embodiment
of the present invention includes a telephone section 100, a Bluetooth
section 200, and a charging section 300. The telephone section 100
includes a ring signal detection circuit 110 which is connected
with a public network 400 and which detects a ring signal of a received
call, an office line connection circuit 120 which interfaces a call
command and an audio signal of a telephone, and a CODEC 130 which
is connected between the Bluetooth section 200 and the office line
connection circuit 120 so as to convert PCM data into analog voice
and vice versa.
The telephone section 100 is connected between the public network
400 and the Bluetooth section 200 so as to interface an incoming
call from the public network 400 to a combined cordless/mobile phone
600 through the Bluetooth section 200. Further, the telephone section
100 interfaces a call oriented from the combined cordless/mobile
phone 600 to the public network 400 through the Bluetooth section
200. Specifically, the ring signal detection circuit 110 of the
telephone section 100 is connected with a telephone line connected
with the public network 400, so as to detect a ring signal received
from the public network 400 and deliver the detected ring signal
to the CPU 210 of the Bluetooth section 200. The office line connection
circuit 120 of the telephone section 100 is connected between the
telephone line connected with the public network 400 and the CPU
210 of the Bluetooth section 200, so as to interface the audio signal
and call command received from or transmitted to the public network
400.
The Bluetooth section 200 of the battery charging apparatus includes
a CPU 210, a memory 220, a PCM interface 240, and an RF receiver/transmitter
230 transmitting and receiving data through a Bluetooth antenna
250. The CPU 210 of the Bluetooth section 200 according to the present
embodiment controls not only the Bluetooth section 200 but also
the general operation of the telephone section 100 and the charging
section 300. Specifically, in the present embodiment, the CPU 210
of the Bluetooth section 200 controls a charging circuit 330 and
a voltage control circuit 320 of the charging section 300 and the
ring signal detection circuit 110 and the office line connection
circuit 120 of the telephone section 100. The memory 220 stores
a program for controlling the CPU 210. The RF receiver/transmitter
230 is also connected with the CPU 210, so as to modulate/demodulate
data. The Bluetooth section 200 further includes the Bluetooth antenna
250 connected with the RF receiver/transmitter 230 so as to transmit
and receive data through RF wave.
Meanwhile, the charging section 300 includes an AC/DC adapter 310,
a voltage control circuit 320, a charging circuit 330, and a charging
terminal 340. The charging section 300 is connected with an external
electric power source 500 so as to receive electric power from the
external electric power source 500, and charges a battery when the
battery is connected with the charging section 300. A detailed description
about the construction and operation of the charging section 300
will be omitted here since they are similar to those of a common
battery charging apparatus. According to the first embodiment of
the present invention as described above, a mobile phone can be
connected with a public network through a battery charging apparatus
and can be used as a cordless telephone.
FIG. 2 is a block diagram of a battery charging apparatus according
to the second embodiment of the present invention.
The battery charging apparatus according to the second embodiment
of the present invention has the same construction as that in the
first embodiment, excepting that the battery charging apparatus
according to the present embodiment includes two CPUs. That is,
in the battery charging apparatus according to the second embodiment,
one CPU is included in the telephone section 100 while the other
CPU is included in the Bluetooth section 200.
In more detailed description, all of the telephone section 100,
although the Bluetooth section 200, and the charging section 300
are controlled by the CPU 210 of the Bluetooth section 200 in the
first embodiment of the present invention, the Bluetooth section
200 is controlled by the CPU 210 of the Bluetooth section 200 while
the telephone section 100 and the charging section 300 are controlled
by a CPU 150 of the telephone section 100 in the second embodiment
of the present invention. That is, the CPU 150 of the telephone
section 100 controls the ring signal detection circuit 110 and the
office line connection circuit 120 of the telephone section 100
and the voltage control circuit 320 and the charging circuit 330
of the charging section 300, while the CPU 210 of the Bluetooth
section 200 controls the memory 220, the RF receiver/transmitter
230, and the PCM interface 240. These two CPUs transmit and receive
data through a Universal Asynchronous Receiver-Transmitter (UART)
interface.
The above-described battery charging apparatus according to the
second embodiment of the present invention can be realized without
significantly changing the constructions of a usual telephone and
Bluetooth module and enables a mobile phone to be connected with
a public network through a battery charging apparatus and thus be
used as a cordless telephone.
FIG. 3 is a block diagram of a battery charging apparatus according
to the third embodiment of the present invention.
The battery charging apparatus according to the third embodiment
of the present invention has the same construction as that in the
first embodiment, except for the telephone section 100. The telephone
section 100 of the battery charging apparatus according to the third
embodiment of the present invention includes an audio signal path
control circuit 160, a key input circuit 170, an audio signal amplifying
section 180, a microphone 192, and a speaker 194, in addition to
the construction of the telephone section 100 according to the first
embodiment of the present invention. The microphone 192 and the
speaker 194 together serve as a usual receiver of a telephone. The
audio signal amplifying section 180 amplifies signals inputted and
outputted through the microphone 192 and the speaker 194. The audio
signal path control circuit 160 switches or synthesizes the signals
inputted and outputted through the microphone 192 and the speaker
194 and signals inputted through the CODEC 130 from the Bluetooth
section 200. Further, the key input circuit 170 enables the battery
charging apparatus to dial for itself. As a result, the battery
charging apparatus can function as a typical wire telephone. Therefore,
the battery charging apparatus according to the third embodiment
of the present invention not only can function as a usual wire telephone
but also enables a mobile phone to be used as a cordless telephone.
FIG. 4 is a diagram showing a message flow in a process of pairing
between a telephone gate and a combined cordless/mobile phone having
a Bluetooth module according to an embodiment of the present invention.
In order to connect a combined cordless/mobile phone through a
Bluetooth communication with a battery charging apparatus connected
with wire network so as to enable the mobile phone to be used as
a cordless telephone, the mobile phone and the battery charging
apparatus must be paired with each other in advance. In this case,
the pairing signifies registration of a combined cordless/mobile
phone in a battery charging apparatus, which can be connected with
the battery charging apparatus through a Bluetooth communication.
The most important object of the pairing is to prevent another phone
from connecting with the battery charging apparatus and thereby
connecting with the wire network. Hereinafter, the process of the
pairing will be described.
First, in step 10, the mobile phone 600 transmits a registration
request message BTMM_inquired_req in order to find out whether there
exists a telephone gate around it or not. In response to the registration
request message, in steps 12 and 14, a predetermined number of telephone
gates or battery charging apparatuses transmit a response message
BTMM_inquire_ind to the mobile phone. Then, in step 16, the mobile
phone 600 transmits a message BTMM_read_remote_name_req to found
telephone gates, which requests the found telephone gates to transmit
their Bluetooth addresses. In step 18, the telephone gates transmit
their Bluetooth addresses, so that the mobile phone 600 can obtain
a list of the telephone gates found in its vicinity. Thereafter,
in step 20, the mobile phone 600 transmits a Bluetooth message BTSM_pair_req
to one telephone gate which a user wants to register, thereby selecting
the telephone gate. In step 22, after receiving the message BTSM_pair_req,
the selected telephone gate transmits a Bluetooth message BTSM_pin_ind
to the mobile phone, thereby requesting a user authority certification
which will be described hereinafter. The user authority certification
can be classified into two cases in which the mobile is either with
or without a key input section. In the case where the mobile phone
has a key input section, the telephone gate requests a password
for the selected telephone gate to the mobile phone. In the case
where the mobile phone has no key input section, the telephone gate
may request an action of turning off and then turning on the power
of the mobile phone again or may check whether a Bluetooth mobile
phone having dimensions meeting the standard of a desktop battery
charging apparatus has been assembled with the desktop battery charging
apparatus or not. Then, the mobile phone requests the user to input
the password. When the user has inputted a Bluetooth pin BT_PIN
number of the telephone gate, the mobile phone transmits a message
BTSM_pin_res (accept=TURE) containing the Bluetooth pin number to
the telephone gate in step 24. The telephone gate determines whether
the received Bluetooth pin number is correct or not. Thereafter,
when the received Bluetooth pin number is correct, the telephone
gate transmits a Bluetooth message BTSM_pin_cfm (accept=TURE) informing
that the registration has been completed to the Bluetooth mobile
phone, and stores the Bluetooth address BD_ADDR of the mobile phone
in a pairing list. After that time, the telephone gate allows office
line communications only with Bluetooth mobile phones included in
the pairing list, and the maximum number of mobile phones which
may be included in the pairing list may be three.
FIG. 5 is a flowchart of a process of registering a Bluetooth mobile
phone in a battery charging apparatus according to the present invention.
First, the battery charging apparatus determines whether a Bluetooth
mobile phone is assembled with the battery charging apparatus or
not in step 602. When the Bluetooth mobile phone is assembled with
the battery charging apparatus, the battery charging apparatus charges
a battery of the mobile phone in step 604. When the Bluetooth mobile
phone is not assembled with the battery charging apparatus, the
process goes to step 606. In step 606, the battery charging apparatus
judges whether it can enter an Inquiry scan mode or not. In this
case, the Inquiry scan mode is defined by Bluetooth specification
1.0 and signifies a state where the battery charging apparatus can
receive an inquiry from another Bluetooth apparatus and inform a
Bluetooth address of the Bluetooth apparatus. This state in which
the battery charging apparatus can enter the Inquiry scan mode signifies
the following states: first, a state in which a mobile phone having
dimensions meeting the standard of the battery charging apparatus
has been assembled with the battery charging apparatus; second,
a state in which a predetermined period of time has not passed yet
after a Bluetooth function key is pressed; and third, a state in
which a predetermined period of time has not passed yet after a
Bluetooth function key is pressed and a password for the battery
charging apparatus is inputted (in the case where battery charging
apparatus has a key input section), and a state in which a predetermined
period of time has not passed yet after an electric power for the
battery charging apparatus is turned on. As a result of the judgment,
when the battery charging apparatus judges can enter the Inquiry
scan mode, the battery charging apparatus enters the Inquiry scan
mode in step 608. Thereafter, the battery charging apparatus judges
whether there exists a request for registration from a Bluetooth
mobile phone or not in step 610. When there exists a request for
registration from a Bluetooth mobile phone, the battery charging
apparatus determines whether the number of registered mobile phones
exceeds a predetermined limit or not in step 612, and then determines
whether the password received from the mobile phone is correct or
not in step 614. When the password received from the mobile phone
is correct, the battery charging apparatus registers and stores
a use-as-cordless telephone permission so as to enable the mobile
phone to be used as a cordless telephone in step 618. Thereafter,
in step 620, the battery charging apparatus is in a waiting mode,
so that a user can make a phone call by utilizing the mobile phone
as a cordless telephone. When the user requests deletion of the
registered mobile phones in step 622, the battery charging apparatus
deletes the registered mobile phones in step 624.
FIG. 6 is a flowchart of a call processing procedure in a battery
charging apparatus according to the present invention. According
to the present invention, the battery charging apparatus connects
a call from the public network to a combined cordless/mobile phone
a call from a combined cordless/mobile phone to the public network
through the Bluetooth communication.
First, in step 702, the battery charging apparatus determines whether
there exists an incoming call from the public network or not. When
there exists an incoming call from the public network, the battery
charging apparatus outputs a ring signal to a wire telephone in
step 704. Then, in step 706, the battery charging apparatus judges
whether there exists a Bluetooth mobile phone having a permission
to be used as a cordless telephone or not. In this case, this judgment
is carried out by determining whether or not there exists a Bluetooth
mobile phone which has obtained the use-as-cordless telephone permission
through the registering process.
When a Bluetooth mobile phone having the permission is in a cordless
telephone mode, the battery charging apparatus sets a Bluetooth
connection in step 718 and outputs a ring signal to the Bluetooth
mobile phone in step 720. The battery charging apparatus judges
whether the user responds to the incoming call through the wire
telephone or not in step 722, and judges whether the user responds
to the incoming call through the Bluetooth mobile phone or not in
step 724. When the user responds to the incoming call through the
wire telephone, a process A is initiated. In contrast, when the
user responds to the incoming call through the Bluetooth mobile
phone, a process B is initiated.
FIG. 7 is a flowchart of a call processing procedure in the case
where the user responds to the incoming call through the Bluetooth
mobile phone.
When the user responds to the incoming call through the Bluetooth
mobile phone, the battery charging apparatus judges whether the
Bluetooth connection is maintained or not in step 726. When the
Bluetooth connection is not being maintained, the battery charging
apparatus sets the Bluetooth connection again in step 728. When
the Bluetooth connection is being maintained, the process goes to
step 730. In step 730, the battery charging apparatus opens an SCO
link between the battery charging apparatus and the Bluetooth mobile
phone, so that the user can use the Bluetooth mobile phone in performing
a communication through the public network. In other words, the
battery charging apparatus opens the SCO link in step 730, thereby
enabling the user to use the Bluetooth mobile phone as a cordless
telephone in step 732. Thereafter, in step 734, the battery charging
apparatus judges whether the user has changed the communication
mode of the Bluetooth mobile phone to a cordless telephone mode
or not. As a result of the judgment, when it is confirmed that the
user has changed the communication mode of the Bluetooth mobile
phone to the cordless telephone mode, the process B is initiated.
In step 736, the battery charging apparatus judges whether the user
has terminated communication or not. When the user has terminated
the communication, the battery charging apparatus enters step 740.
In contrast, when the user is performing the communication, the
battery charging apparatus returns to step 732. When the communication
has been terminated, the battery charging apparatus closes the SCO
link in step 740, and then cancels the Bluetooth connection in step
742.
FIG. 8 is a flowchart of a call processing procedure in the case
where the user responds to the incoming call through the wire telephone.
When the user responds to the incoming call through the wire telephone,
the battery charging apparatus allows the user to continue a communication
through the wire telephone in step 760. Thereafter, in step 762,
the battery charging apparatus judges whether the user has changed
a communication mode from a wire telephone mode to a Bluetooth mobile
phone mode or not. When the user has changed the communication mode
to the Bluetooth mobile phone mode, the battery charging apparatus
enters the process A. In contrast, when the user continues the communication
through the wire telephone, the battery charging apparatus cancels
the Bluetooth connection in step 764. Thereafter, the battery charging
apparatus determines whether the communication has been completed
in step 768. The process returns to step 760 when the communication
is being continued.
FIG. 9 is a flowchart of an operation of a Bluetooth mobile phone
in a cordless telephone mode according to the present invention.
Firtst, the mobile phone 600 determines whether the mobile phone
is performing a communication or not in step 802, and enters step
804 when the mobile phone is not used. In step 804, the mobile phone
600 determines whether a cordless telephone mode is allowed or not.
Then, in step 806, the mobile phone 600 determines whether there
exists any paired Bluetooth battery charging apparatus or not, and
sets the mode of the Bluetooth mobile phone to the cordless telephone
mode in step 814. After the cordless telephone mode is set, the
mobile phone 600 determines whether there exists an incoming call
from the public network in step 816. When there exists an incoming
call from the public network, the mobile phone 600 outputs a ring
signal in step 822. The mobile phone 600 determines whether the
user responds to the incoming call in step 824, and processes the
call in a general way in step 826. Thereafter, the mobile phone
600 determines whether the communication is completed or not in
step 828, and the process is ended when the communication is completed.
In the case where there exists no incoming call from the public
network according to the determination of the mobile phone 600 in
step 816, the mobile phone 600 enters step 818 and judges whether
there exists an incoming call to the number of the mobile phone
or not. When there exists an incoming call to the number of the
mobile phone, the mobile phone 600 shifts its mode to a mobile phone
mode so that it can be used as a typical mobile phone.
FIG. 10 is a flowchart of an operation of a Bluetooth mobile phone
according to the present invention in the case where the Bluetooth
mobile phone originates a call through a public network.
First, the mobile phone 600 determines whether it is in the cordless
telephone mode or not in step 850. When the user wants to originate
a call through a public network, the user can set the mode of the
mobile phone 600 into the cordless telephone mode. When the mobile
phone 600 is not in the cordless telephone mode, the mobile phone
600 can function as a typical mobile phone in step 852. In step
854, the mobile phone 600 requests the Bluetooth connection and
judges whether the Bluetooth connection has been made or not. When
the mobile phone 600 has been connected with the Bluetooth battery
charging apparatus through the Bluetooth communication, the mobile
phone 600 outputs a ring-back tone in step 858 and then processes
the call in step 860. Thereafter, the mobile phone 600 determines
whether the communication has been completed or not in step 862,
and ends the process when the communication has been completed.
When it is confirmed from the judgment in step 854 that the mobile
phone 600 has failed to connect with the Bluetooth battery charging
apparatus, the mobile phone 600 displays a message, for example
"out of range", in step 870. From this message, the user
can move to an area in which the user can originate a call through
a public network. Thereafter, in step 872, the mobile phone 600
converts its mode to a mobile phone mode, so that it can be used
as a typical mobile phone.
As described above, the present invention provides an apparatus
which has a construction modified from a conventional desktop battery
charging apparatus having been utilized only in charging a battery
of a mobile phone in the prior art, so that the apparatus can be
connected with a general wire telephone network and a mobile phone
having a Bluetooth module, thereby enabling a mobile phone to be
used not only for its own use but also as a cordless telephone.
According to the present invention described above, a mobile phone
can be connected with a typical wire public network to perform a
communication, thereby enabling a user of the mobile phone to feel
convenient and save the call charge.
While the invention has been shown and described with reference
to certain preferred embodiments thereof, it will be understood
by those skilled in the art that various changes in form and details
may be made therein without departing from the spirit and scope
of the invention as defined by the appended claims. |