FIELD
[0001] The present invention relates to the field of mobile communications. More particularly, the present invention relates to establishing a connection using a dual tone multi frequency.
BACKGROUND
[0002] Often, a user of a mobile phone desires to establish a call to another mobile phone or landline. It might occur that there is no network coverage for the mobile phone of the user to establish the call. The user may then desire to establish the call using another mobile phone or landline. The user then manually enters the contact number in another mobile phone or landline and establishes the call.
[0003] Further, the user may desire to make calls using different telephone equipment in a particular environment. For example, the user may desire to use a landline to make calls in a home environment. In such a scenario, the user needs to manually key in each contact number in the landline to establish a call. Moreover, the phonebook in the landline phone may not have details of the contact with whom the user wishes to
establish the call.
I
[0004] Conventionally, if a user needs to share a contact between one or more users
I then the user needs to send a message or transfer the details of the contact through
Bluetooth. Moreover, typically the user needs to be dependent on the network for sending message and transferring the details of the contact through Bluetooth.
*
[0005] In light of the foregoing discussion, there is a need for a method and system to solve the above mentioned problems.
I

SUMMARY
[0006] Exemplary embodiments of the present invention provide a method and system for establishing a connection using a dual tone multi frequency.
[0007] In one exemplary embodiment, a method for establishing a connection using a dual tone multi frequency (DTMF) includes selecting a contact in a mobile device. Further, the method includes generating the DTMF for the selected contact. The method also includes establishing the connection with a communication device responsive to generating the DTMF.
[0008] In another exemplary embodiment, a method for sharing contacts using dual tone multi frequency (DTMF) includes establishing a call by a mobile device with another mobile device. Further, the method includes selecting one or more contacts in the mobile device. Furthermore, the method includes generating the DTMF for the selected one or more contacts. The method also includes sharing the selected one or more contacts with the another mobile device in the call based on the generated DTMF.
[0009] In yet another exemplary embodiment, a method for controlling an elecfronic device using a dual tone multi frequency includes receiving an input from a user usiog a mobile device. Further, the method includes generating a dual tone multi frequency based on the input. The method also includes transmitting the dual tone multi frequency to the electronic device for locking the electronic device.
[0010] In another exemplary embodiment, a method for controlling an electronic device remotely using dual tone multi frequency (DTMF) includes establishing a call by a mobile device with another mobile device. Further, the method includes receiving an input from a user using the mobile device. The method also includes transmitting the generated DTMF to the another mobile device and unlocking or locking the electronic device based on the transmitted DTMF, wherein the electronic device is in proximity to the another mobile device.

[0011] In one exemplary embodiment, a mobile device for establishing a connection using a dual tone multi frequency (DTMF) includes a DTMF generator for generating the DTMF and a DTMF transceiver for estabUshing the connection with a communication device using the generated DTMF.
BRIEF DESCRIPTION OF THE DRAWINGS
[0012] FIG. 1 is a block diagram of an environment, in accordance with which various exemplary embodiments can be implemented;
[0013] FIG. 2 is a block diagram of a system for establishing a connection using a dual tone multi frequency, in accordance with one embodiment;
[0014] FIG. 3 is a block diagram of a mobile device for establishing a connection using a dual tone multi frequency, in accordance with one embodiment;
[0015] FIG. 4 is a flow chart illustrating a method for establishing a connection using a dual tone muhi frequency, in accordance with one embodiment;
[0016] FIG. 5 is a flow chart illustrating a method for sharing contacts with the communication device offline, in accordance with one embodiment;
[0017] FIG. 6 is a flow chart illustrating a method for sharing contacts using a dual tone multi frequency, in accordance with another embodiment;
[0018] FIG. 7 is a flow chart illustrating a method for controlling an electronic device using a dual tone multi frequency, in accordance with one embodiment; and
[0019] FIG. 8 is a flow chart illustrating a method for controlling an electronic device remotely using a dual tone multi frequency, in accordance with another embodiment.
DETAILED DESCRIPTION

[0020] Exemplary embodiments of the present invention provide a method and system for establishing a connection between communication devices and also between a communication device and an electronic device using a dual tone multi frequency (DTMF).
[0021] FIG. 1 is a block diagram of an environment 100, in accordance with which various embodiments can be implemented. The environment includes one or more communication devices. The communication devices can be one or more mobile devices, for example, a mobile device A 105A, herein referred to as mobile device 105A and another mobile device B 105B, herein referred to as mobile device lOSB, connected to a service provider 115 through a network 110. The communication device can also be a landline phone 120. Examples of the network 110 include, but are not limited to a Public switching telecommunication network (PSTN), Local Area Network (L.AN), a Wireless Local Area Network (WLAN), a Wide Area Network (WAN), internet, a Small Area Network (SAN) and a Personal area network (PAN).
[0022] The mobile device 105A includes a dual tone muUi frequency (DTMF) generator for generating a DTMF. The mobile device 105A also includes a DTMF transceiver for establishing a connection with the communication device using the generated DTMF. The environment 100 also includes an electronic device 125 connected to one or more mobile devices through the network 110.
[0023] FIG. 2 is a block diagram of a system for establishing a coimection using the DTMF. The system includes the mobile device 105A, the mobile device 105B and the landline phone 120. The mobile device 105A includes a DTMF generator 205, a DTMF transceiver 210, and a memory 215. The landline phone 120 includes a microphone 220. The mobile device 105B includes a DTMF transceiver 210B and a memory 215B.
[0024] In accordance with an exemplary embodiment of the present invention, the user of the mobile device 105A wishes to establish the connection using the landline phone 120. The user selects the contact from the phone book of the mobile device 105A.

An option is provided to the user to establish a connection through the landline phone 120 for the selected contact. The user of the mobile device 105A selects the option of establishing the connection through the landline phone 120. The DTMF generator 205 then generates the DTMF for the selected contact. The contacts are stored in the memory 215. Each DTMF generated by the DTMF generator 205 is distinct. The DTMF generated is then sent to the landline phone 120.The DTMF transceiver 210 of the mobile device 105A transmits the generated DTMF to the landline phone 120.
[0025] The landline phone 120 includes the microphone 220. The microphone 220 receives the DTMF transmitted by the mobile device 105A. The connection is then established automatically by the user of the mobile device 105A through the landline phone 120 by using the transmitted DTMF.
[0026] Consider an example, the user of the mobile device 105A wishes to establish the call using the mobile device 105B. The user of the mobile device 105A selects a contact, for example, a contact with a name "xyz" from the phone book. The contact details of one or more contacts are stored in the memory 215 of the mobile device 105 A. The user of the mobile device 105A then enables the option of establishing the call using the mobile device 105B with the contact "xyz". The DTMF generator 205 of the mobile device generates a DTMF for the selected contact "xyz" and is transmitted to the mobile device 105B by the DTMF transceiver 210 of the mobile device 105A. The DTMF transceiver 210B of the mobile device 105B receives the DTMF and the call is established to the contact "xyz" by the user of the mobile device 105A using the mobile device 105B.
[0027] Consider another example, the user of the mobile device 105A has already established the call with the mobile device 105B. The user of the mobile device 105A wishes to share contact details of one or more contacts with the mobile device 105B in the call. The user of the mobile device 105A selects a contact, for example, a contact with a name "abc" from the phone book. The contact details of one or more contacts are stored in the memory 215 of the mobile device 105A. The DTMF generator 205 of the mobile

device 105A generates a DTMF for the selected contact "abc". The DTMF transceiver 210 of the mobile device 105A transmits the DTMF generated for the contact "abc" to the mobile device 105B. The DTMF transmitted by the mobile device 105A is received by the DTMF transceiver 210B of the mobile device 105B. The DTMF transceiver 210B of the mobile device 105B receives the generated DTMF and the contact details of the contact "abc" are shared by the user of the mobile device 105A with the mobile device 105B in the call. The contact details of the contact "abc" are then stored in the memory 215B of the mobile device 105B.
[0028] FIG. 3 is a block diagram of the mobile device 105A for establishing a connection using the DTMF, in accordance with one embodiment.
[0029] The mobile device 105A includes the DTMF generator 205 for generating the DTMF. As the user of the mobile device 105A presses a key, a required frequency is generated. The generated frequencies are referred as DTMF tones. The DTMF tones generated are then decoded to determine which key is been pressed. The DTMF tones generated by the DTMF generator 205 are then transmitted to one or mobile devices or the landline phonel20 for establishing a connection.
[0030] The mobile device 105A includes the DTMF transceiver 210 for establishing a connection with a communication device responsive to generating the DTMF.
[0031] The mobile device 105A includes the memory 215 for storing information. The information stored in the memory 215 can be information of the contact. An example of the memory 215 includes but is not limited to a Random Access Memory (RAM).
[0032] The mobile device 105A includes a cursor control 320. In some embodiments, cursor control 320, for example a mouse, a trackball, a joystick, or cursor direction keys for communicating information to a processor 305 and for controlling cursor movement on a display unit 310 can also be present. The mobile device 105A includes an input device 315. The input device 315 includes various keys for communicating information to the processor 305. The information communicated to the processor 305 can be the

information related to the contact. The information can be communicated to the processor 305 from a machine-readable medium. The term machine-readable medium can be defined as a medium providing data to a machine to enable the machine to perform a specific fimction. The machine-readable medium can be a storage media. The storage media can be the memory 215. All such media must be tangible to enable the instructions carried by the media to be detected by a physical mechanism that reads the instructions into the machine.
[0033] Examples of the machine readable medium includes, but are not limited to, a floppy disk, a flexible disk, hard disk, magnetic tape, a CD-ROM, optical disk, punchcards, papertape, a RAM, a PROM, an EPROM, and a FLASH-EPROM.
[0034] The machine readable medium can also include online links, download links, and installation links providing the information to the processor 305.
[0035] The mobile device 105A also includes a display unit 310. An example of the display unit 310 includes, but is not limited to a liquid crystal display (LCD). The display unit 310 is used for displaying the one or more contacts fi-om the phone book.
[0036] In one embodiment, the display unit 310 is used by the user of the mobile device 105A to enable the option of establishing the connection for the selected contact through at least one of the mobile device 105B and the landline phone 120.
[0037] FIG. 4 is a flow chart illustrating a method for establishing a connection using the DTMF, in accordance with one exemplary embodiment of the present disclosure.
[0038] At step 405, the method starts.
[0039] At step 410, a contact is selected from the mobile device 105A.
[0040] At step 415, the DTMF is generated for the selected contact.

[0041] At step 420, a connection is established with the communication device responsive to generating the DTMF.
[0042] The method stops at step 425.
[0043] In accordance with an exemplary embodiment of the present invention, the user of the mobile device 105A may wish to establish the connection using the landline phone 120. The user of the mobile device 105A selects a contact, for example, a contact with a name "Suresh" from the phone book. The user of the mobile device 105A then enables the option of establishing the connection using the DTMF through the landline phone 120 to the contact "Suresh". Further, the DTMF generator 205 of the mobile device 105A generates a DTMF for the selected contact "Suresh". The DTMF generated for the contact "Suresh" is transmitted to the landline phone 120 by the DTMF transceiver 210. The microphone 220 of the landline phone 120 receives the generated DTMF and the connection is established automatically by the user of the mobile device 105A to the contact "Suresh" through the landline phone 120 using the generated DTMF.
[0044] In accordance with an exemplary embodiment of the present invention, the landline phone 120 should be kept in the DTMF receiving mode to receive the DTMF transmitted by the mobile device 105A. For example, the landline phone 120 can be kept in the DTMF receiving mode by lifting up the receiver of the phone. Tlie landline phone 120 is off hooked. The microphone 220 of the off hooked landline phone picks up the DTMF tones transmitted by the mobile device 105A.
[0045] FIG. 5 is a flow chart illustrating a method for sharing contacts with the communication device offline, in accordance with one embodiment.
[0046] At step 505, the method starts.
[0047] At step 510, a contact is selected in the mobile device 105A.

[0048] At step 515, the DTMF is generated for the selected contact. The DTMF generator 205 generates the DTMF for the selected contact in the mobile device 105A.
[0049] At step 520, a connection is established with the communication device responsive to generating the DTMF. The DTMF transceiver 210B of the mobile device 105B receives the generated DTMF and the cormection is established.
[0050] At step 525, one or more contacts are shared with the communication device offline. The one or more contacts shared are stored in the memory 21 SB of the mobile device 105B.
[0051] The method stops at step 530.
[0052] FIG. 6 is a flow chart illustrating a method for sharing contacts using the DTMF, in accordance with another embodiment.
[0053] At step 605, the method starts.
[0054] At step 610, a call is established by the mobile device 105A with the mobile device 105B.
[0055] At step 615, one or more contacts are selected in the mobile device 105A. These contact needs to be shared from the phone book of the mobile device 105A to the mobile device 105B.
[0056] At step 620, the DTMF is generated for the one or more contacts selected by the user of the mobile device 105A. The DTMF generator 205 of the mobile device 105A generates the DTMF for the one or more contacts selected.
[0057] At step 625, the selected one or more contacts are shared with the mobile device 105B in the call based on the generated DTMF.

[0058] The DTMF transceiver 21 OB of the mobile device 105B receives the generated DTMF and the one or more contacts are shared with the mobile device 105B in the call.
[0059] Consider an example, a user of the mobile device 105A wishes to share the contact with the mobile device 105B during the conversation. The user of the mobile device 105A selects the contact to be shared during the conversation with the mobile device 105B using the DTMF signal. The DTMF generator 205 of the mobile device 105A generates the DTMF for the selected contact. The DTMF transceiver 210 of the mobile device 105A transmits the DTMF generated to the mobile device 105B. The DTMF transceiver 210B of the mobile device 105B receives the DTMF for the selected contact and the contact is shared between the mobile device 105A and the mobile device 105B during the conversation. The one or more contacts shared are stored in the mobile device 105B.
[0060] The method stops at step 630.
[0061] FIG. 7 is a flow chart illustrating a method for controlling the electronic device 125 using the DTMF, in accordance with one embodiment.
[0062] At step 705, the method starts.
[0063] At step 710, an input is received from a user using the mobile device 105A.
[0064] The user presses one or more keys on the keypad of the mobile device 105A as the input for locking the electronic device 125. The input received by the user is set as a password for locking the electronic device 125.
[0065] At step 715, the DTMF is generated based on the input. The DTMF generator 205 of the mobile device 105A generates the DTMF for the input provided by the user. The DTMF generated is then transmitted to the electronic device 125.
[0066] At step 720, the DTMF is transmitted to the electronic device 125. The DTMF transceiver 210 of the mobile device 105A transmits the DTMF generated to the

electronic device 125. In one embodiment, the electronic device 125 includes a DTMF receiver to receive the DTMF transmitted by the mobile device 105A.
[0067] At step 725, the electronic device 125 is locked. The DTMF receiver of the electronic device 125 receives the DTMF transmitted by the mobile device 105A. The DTMF received from the user of the mobile device 105A is set as the password and the electronic device 125 is locked. The DTMF received can also be used to unlock the electronic device 125.
[0068] Consider an example, a user wishes to lock an electronic door from the mobile device 105A using the DTMF. The user presses one or more keys on the keypad of the mobile device 105A as the input for locking the electronic door. For example, the keys pressed on the keypad of the mobile device 105A as input are "123321". The DTMF generator 205 generates the DTMF for the corresponding keys pressed as the input. The DTMF transceiver 210 transmits the DTMF generated to the electronic door using the DTMF signal. The DTMF receiver of the electronic door receives the DTMF transmitted by the mobile device 105A. The DTMF received by the user of the mobile device 105A is set as the password and the electronic door is locked using the DTMF signal. Further, the user can unlock the electronic door using the DTMF generated for the input "123321".
[0069] The method stops at step 730.
[0070] FIG. 8 is a flow chart illustrating a method for controlling the electronic device 125 remotely using the DTMF, in accordance with another embodiment.
[0071] At step 805, the method starts.
[0072] At step 810, a call is established by the mobile device 105A with the mobile device 105B.
[0073] At step 815, an input is received from a user using the mobile device 105A.

[0074] The user presses one or more keys on the keypad of the mobile device 105A as the input for unlocking the electronic device 125. The input received by the user is set as a password for unlocking the electronic device 125.
[0075] At step 820, the DTMF is generated based on the input. The DTMF generator 205 of the mobile device 105A generates the DTMF for the input provided by the user.
[0076] At step 825, the DTMF is transmitted to the mobile device 105B. The DTMF transceiver 210 of the mobile device 105A transmits the DTMF generated to the mobile device 105B.
[0077] At step 830, the electronic device 125 is unlocked using the transmitted DTMF.
[0078] The method stops at step 835.
[0079] Various embodiments of the invention provide a method and system for establishing a cormection using the DTMF. The user of the mobile device 105A can easily establish a cormection with the mobile device 105B or the landline phone 120 using the DTMF signal. This is specifically useful when there is no network available to the mobile device 105A. Fiirther, as the DTMF generator 205 is common in mobile phones and all the landline phones are equipped with a microphone 220 to receive the DTMF, it is easy for the user to establish call despite of limited network coverage. The user of the mobile device lOSA can easily share the contact details of one or more contacts with mobile device 105B using DTMF. Some advantages of the exemplary embodiments of the present disclosure are sharing contact details of one or more contacts using DTMF is very cheap to the user of the mobile device 105A. Furthermore, the user of the mobile device 105A can control the electronic device 125 remotely. This includes locking or unlocking the electronic device 125 which is remotely located or in close vicinity using the DTMF.
[0080] In the preceding specification, the present invention and its advantages have been described with reference to specific embodiments. However, it will be apparent to a

person of ordinary skill in the art that various modifications and changes can be made, without departing from the scope of the present invention, as set forth in the claims below. Accordingly, the specification and figures are to be regarded as illustrative examples of the present invention, rather than in restrictive sense. All such possible modifications are intended to be included within the scope of the present invention.

I/We claim:
1. A method for establishing a connection using dual tone multi frequency (DTMF), the
method comprising:
selecting a contact in a mobile device;
generating the DTMF for the selected contact; and
establishing the connection with a communication device responsive to generating the
DTMF.
2. The method of claim 1, wherein the communication device is one of:
a landline phone; and
another mobile device.
3. The method of claim 1, wherein the step of establishing comprises at least one of:
establishing a call with the communication device;
establishing a call with the selected contact using the communication device; and sharing one or more contacts with the communication device offline.
4. A method for sharing contacts using dual tone muhi frequency (DTMF), the
method comprising:
establishing a call by a mobile device with another mobile device; selecting one or more contacts in the mobile device; generating the DTMF for the selected one or more contacts; and sharing the selected one or more contacts with the another mobile device in the call based on the generated DTMF.
5. The method of claim 4, wherein the step of sharing comprises: storing the selected one or more contacts in the another mobile device.
6. A method for controlling an electronic device using dual tone multi frequency (DTMF),

the method comprising:
receiving an input from a user using a mobile device; generating the DTMF based on the input; transmitting the generated DTMF to the electronic device; and locking the electronic device.
7. The method of claim 6, further comprising:
unlocking the electronic device using the generated DTMF.
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8. A method for controlling an electronic device remotely using dual tone multi
frequency (DTMF), the method comprising: establishing a call by a mobile device with another mobile device; receiving an input from a user using the mobile device; generating the DTMF based on the input;
transmitting the generated DTMF to the another mobile device; and locking the electronic device based on the transmitted DTMF, wherein the electronic device is in proximity to the another mobile device.
9. The method of claim 8, fiirther comprising:
unlocking the electronic device using the transmitted DTMF.
10. A mobile device comprising:
a dual tone multi frequency (DTMF) generator for generating a DTMF; and
a DTMF transceiver for establishing a cotmection with a communication device
responsive to generating the DTMF.
11. A system for performing a method, the method as described herein and in
accompanying figures.