# Patent

## Title
Message injection system and method

## Abstract

A mobile communication device including an application running in a first memory of the device, an application audio unit in the first memory, the application audio unit being communicatively coupled to the application operating, and a telephony unit in the first memory, the telephony unit being communicatively coupled to the application, a radio transmission unit including a radio interface unit operating in a second memory and communicatively coupled to the telephony unit, a radio audio unit operating in the second memory, the radio audio unit being communicatively coupled to the radio interface unit, and a hardware driver unit communicatively coupled to the radio interface unit, the hardware driver unit initiating a communication connection between the mobile communication device and another device, an audio switching unit communicatively coupled to the application unit and the radio transmission unit.

## Background
CROSS REFERENCE TO RELATED APPLICATIONS
This application claims the benefit of U.S. Provisional Application No. 61/414,823, filed Nov. 17, 2010, which is incorporated by reference herein in its entirety.


BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention is directed to a device and method for injecting media information into a cellular communication.
2. Background of the Invention
Devices capable of sending and receiving communications, such as phone calls, text messages, electronic mail, instant messaging requests, and other electronic updates and information are becoming increasingly prevalent. Such devices come in a wide variety and may be generally stationary, such as a desktop computer, TV/Set-Top box, static game console, etc., or may be easily portable, such as a smart phone, tablet computer, notebook computer, personal digital assistant (“PDA”), portable game console, portable media device, etc. Further, such devices may send and receive communications through a wide variety of wired or wireless connections, standards, or protocols, such as the Internet, an intranet, voice over internet protocol (“VOIP”), satellite, 3G, SMS, MMS, 4G, WIMAX, etc.
The ability to record audio messages and store these messages in the memory of these devices is widely known. In addition, the ability to encode live audio and route the live audio to a network, such as a cellular network, is also widely known. However, current devices do not allow the transmission of stored audio to a cellular network. Accordingly, only live audio streams can be uplinked to a cellular network. Because of this gap, a mobile communication device is dependent on the network it is connected to for storage of audio messages transmitted from the network, such as a voice mail server. This limits the use of audio recordings on cellular devices. Consequently, there is a need for device that has the ability to transmit recorded media information to devices on a wireless network.
SUMMARY OF THE INVENTION
Various embodiments of the present invention include a mobile communication device including an application unit in a first memory of the device that includes an application, an application audio framework that is communicatively coupled to the application, and a telephony unit communicatively coupled to the application. The device also includes a radio transmission unit, operating in a second memory of the device, with the radio communication unit including a radio interface unit that is communicatively coupled to the telephony unit, a radio audio framework communicatively coupled to the radio interface unit, and a hardware driver unit communicatively coupled to the radio interface unit. The hardware driver unit is configured to initiate a communication connection between the mobile communication device and another communication device. The device also includes an audio switching unit communicatively coupled to the application unit and the radio transmission unit, where the application transmits an audio signal stored in the first memory over a wireless network via the audio switching unit and radio transmission unit.
These and other features and advantages of the present invention will be apparent from the following detailed description, in conjunction with the appended claims.



BRIEF DESCRIPTION OF THE DRAWINGS
Details of the present invention, including non-limiting benefits and advantages, will become more readily apparent to those of ordinary skill in the relevant art after reviewing the following detailed description and accompanying drawings, wherein:
FIG. 1 illustrates a schematic representation of a mobile communication device;
FIG. 2 illustrates a schematic representation of the interaction between an application processing unit and radio communication unit in the mobile communication device of FIG. 1;
FIG. 3A illustrates a schematic representation of an audio switch unit in the mobile communication device of FIG. 1;
FIG. 3B illustrates a schematic representation of the audio switch unit of FIG. 3A when a telephone call is active;
FIG. 4 depicts an illustrative example of the mobile communication device of FIG. 1 transmitting an audio signal to a speaker on the mobile communication device;
FIG. 5A depicts the audio switch unit in the mobile communication device of FIG. 1 with an audio path opened between the application audio unit and radio audio unit;
FIG. 5B depicts a schematic representation of a process used to transmit a prerecorded audio file over a wireless network via the radio interface unit in the mobile communication device of FIG. 1;
FIG. 5C depicts a schematic representation of a process used to transmit an analog signal from an application in the mobile communication device of FIG. 1 to the wireless network when a call is received by the mobile communication device of FIG. 1;
FIG. 5D depicts a schematic representation of the mobile communication device of FIG. 1 that is capable of transmitting video over a wireless network;
FIG. 6A depicts a configuration of the audio switch unit in the mobile communication device of FIG. 1;
FIG. 6B depicts a schematic representation of a process to transmit an audio signal from the mobile communication device of FIG. 1 over a wireless network;
FIG. 7A depicts a schematic representation of the mobile communication device of FIG. 1 connected to an external device that transmits a prerecorded audio signal over a wireless network; and
FIG. 7B depicts a schematic representation of a process to transmit an audio signal from an external device over a wireless network through the mobile communication device of FIG. 1.



DETAILED DESCRIPTION
While the present invention is susceptible of embodiment in various forms, there is shown in the drawings and will hereinafter be described one or more embodiments with the understanding that the present disclosure is to be considered illustrative only of the invention and is not intended to limit the invention to any specific embodiment disclosed herein.
The present disclosure is directed to one or more communication devices capable of transmitting an audio signal over a wireless network, such as a cellular network, to a second device. The transmission of the audio signal may be part of a larger communication management system which is used to notify callers that the user of the mobile communication device is unavailable. The audio signal may be sent as a single transmission, or may be appended to another audio signal that was received in real time.
FIG. 1 illustrates a mobile communication device 100. The mobile communication device 100 includes an application processing unit 102 that includes a central processing unit (CPU) 104 and a digital signal processor (DSP) 106, a radio communication unit 108 that includes a CPU 110 and DSP 112, a memory 114, an input output (IO) unit 116 that includes an audio switch unit 118, a display 120, and a secondary storage unit 122. The radio communication unit 108 is configured to communicate across a wireless network. The radio communication unit 108 may be configured to communicate over a wireless cellular network using any cellular protocol including, but not limited to, code division multiple access (CDMA), global system for mobile communications (GSM), and universal mobile telecommunications system (UMTS), or any other cellular communication protocol.
The IO Unit 116 is coupled to a speaker 124 and a microphone 126 via the audio switch unit 118. The audio switch unit 118 is configured to receive an audio signal from the microphone 126, and to adjust various characteristics of the received audio signal. The audio switch unit 118 may adjust the volume of the audio, side tone generation, comfort noise generation, echo cancelation, automatic gain, noise suppression, tone generation, or any other characteristic of the audio signal. The audio switch unit 118 also routes audio signals received by the microphone 126 to the application processing unit 102, or the radio communication unit 108, and also routes audio from the application processing unit 102 and radio communication unit 108 to the speaker 124.
FIG. 2 illustrates a schematic representation of the interaction between the application processing unit 102 and radio communication unit 108. The application processing unit 102 includes an operating system 200 running in the CPU 104 of the application processing unit 102. The operating system 200 may be any commercially available operating system including Linux, Windows Mobile, Google Android, or any other operating system capable of running on a mobile device. The operating system 200 controls the operation of the CPU 104 and DSP 106 in the application processing unit 102. An application 202 operating in the operating system 200 interacts with different components of the mobile device 100, such as the display 120, speaker 124, and microphone 126, via an application programming interface (API) 204.
The radio communication unit 108 includes a radio interface unit 220, a radio daemon unit 222, a radio audio unit 224, and a driver unit 226 operating via the CPU 110 and DSP 112. The radio audio unit 224 is communicatively coupled to the audio switch unit 118, such that the audio switch unit 118 transmits audio captured by the microphone 126 for transmission over the wireless network by radio hardware coupled to the driver unit 226. The radio audio unit 224 also transmits audio information received from the radio hardware via the driver unit 226 to the speaker 126 via the audio switch unit 118.
The radio interface unit 220 performs high level operations to initiate a connection between the mobile device 100 and another device connected to the wireless network via the driver unit 226. The radio interface unit 220 is also communicatively coupled to a telephony unit 206 in the application processing unit 102. As an illustrative example, the radio interface unit 220 may receive a command from the telephony unit 206 to initiate a phone call between two mobile devices. The radio interface unit 220 communicates with the radio audio unit 224 and driver unit 226, via the radio daemon unit 222, to connect to the wireless network and initiate a call between the two devices. The radio interface unit 220 also communicates with the telephony unit 206 to notify the telephony unit 206 that a phone call has been initiated either by the mobile device 100 or by an external device that is calling the mobile device 100. The telephony unit 206 communicates with the application 202 running in the application processing unit 102 to provide a status of the radio transmission unit 208, and to initiate actions in the radio transmission unit 108.
The radio audio unit 224 in the radio communication unit 108 is communicatively coupled to the audio switch unit 118, such that the radio audio unit 224 instructs the audio switch unit 118 to send audio signals from the microphone 126 to the radio audio unit 224, and to transmit audio signals from radio audio unit 224 to the speaker 124 via the audio switch unit 118. The hardware driver unit 226 is communicatively coupled to the radio hardware in the mobile device 100 such that the hardware driver unit 226 initiates a connection with a wireless network, via the radio hardware, and controls the transmission and receipt of audio signals onto and from the wireless network. The hardware driver unit 226 is communicatively coupled to the radio audio unit 224 via the radio interface unit 220 and the radio daemon unit 222, such that the radio audio unit 224 provides audio signals from the microphone 126 to the hardware driver unit 226 for transmission over the wireless network. The hardware driver unit 226 also transmits audio signals received from the wireless network to the radio audio unit 224 for transmission to the speaker 124.
FIG. 3A illustrates a schematic representation of the audio switch unit 118 transmitting audio to the speaker 124 and/or microphone 126. The audio switch unit 118 is communicatively coupled to the speaker 124, the microphone 126, and an external device 300. The audio switch unit 118 receives a signal from the application 202, via the application audio unit 208, requesting the creation of an audio path 302 between the speaker 124, microphone 126 or external device 300. Upon receiving the request, the audio switch unit 118 creates an audio path 302 between the requested devices and the application audio unit 208. The application audio unit 208 applies the appropriate filters to the audio signal sent to, or received from, the audio switch unit 118, and routes the audio signal to the audio switch unit 118. The application 202 transmits audio signals to the speaker 124, or external device 300, via the audio path 302, and receives audio signals from the microphone 126, or external device 300, via the audio path. The audio signals may be in any format used to store audio including, but not limited to MP3, MPEG, WAV or any other digital audio format. The application audio unit 208 may convert the audio signals to analog audio signals before transmitting the analog audio signals to the audio switch unit 118.
FIG. 3B illustrates a schematic representation of the audio switch unit 118 when the radio transmission unit 108 is managing a call between the mobile communication device 100 and another device via a wireless network. When the audio switch unit 118 receives a signal from the radio interface unit 220, via the radio audio unit 224, to open an audio path 304 between the radio interface unit 220, the speaker 124, microphone 126, or the external device 300, the audio switch unit 118 closes all open audio paths, and opens audio paths 304 between the radio interface unit 220 and the speaker 124 and between the radio interface unit and the microphone 126, or between the radio interface unit 220 and the external device 300. The radio audio unit 224 includes all necessary filters required to prepare the audio signal received from the microphone 126 for transmission over the wireless network via the radio interface unit 220 and the driver unit 226.
FIG. 4 depicts an illustrative example of a mobile communication device 100 transmitting an audio signal to the speaker 124. In step 402, a user requests an application 202 transmit an audio signal to the speaker 124. The application 202, in step 404, requests the status of the speaker 124 from the audio switch unit 118. If an audio path is open between the speaker 124 and the radio interface unit 220, the application 202 waits for the speaker 124 to become available. If the speaker 124 is available, the application 202 requests the status of the radio interface unit 220, via telephony unit 206, at step 406. The radio interface unit 220 returns a status of “IN CALL” indicating a telephone call is incoming, or “AT REST” indicating that the radio interface unit 220 is not currently receiving a telephone call.
If the radio interface unit 220 returns a status of “IN CALL,” the application 202 directs the audio switch unit 118 to open an audio path 302 between the application 202 and the speaker 124 to transmit a pre-assigned ringtone audio signal, via the application audio unit 208, to the speaker 124 in step 408. The audio switch unit 118 closes any open audio connections to the speaker 124, and opens an audio path 302 between the application 202 and the speaker to transmit the pre-assigned audio signal to the speaker 124. While the ringtone audio signal is being transmitted to the speaker 124, the telephony unit 206 requests the caller information from the radio interface unit 220, which is passed to the application 202 for display to a user via the display 120 of the mobile device 100. The application 202 also presents buttons on the display 120 that ask the user if they would like to accept or decline the incoming call.
If the user accepts the call, via the buttons displayed by the application 202 on the display 120, the telephony unit 206 sends a signal to the radio interface unit 220 to initiate the call in step 410. The radio interface unit 220 initiates a connection to the wireless network via the driver unit 226, and instructs the audio switch unit 118 to open audio paths 304 between the radio interface unit 220, the speaker 124, and microphone 126. The audio switch unit 118 closes the audio path 302 between the application 202 and the speaker 124, and opens the audio path 304 between the speaker 124, microphone 126, and the radio interface unit 220 via the radio audio unit 224. Upon termination of the audio path 302 to the application 202, transmission of the ringtone audio signal by the application 202 is terminated. In step 414, the radio interface unit 220 waits for the call to terminate before sending a signal to the telephony unit 206 that the call has ended. Once the call has ended the application 202 returns to step 402, and the audio switch unit 118 closes the audio path 304 between the radio interface unit 220, the speaker 124, and the microphone 126.
In step 416, if the radio interface unit 220 returns an indication that the phone is “AT REST,” the application 202 opens an audio path 302 between the application 202 and the speaker 124 via the application audio unit 208 and the audio switch unit 118. In step 418, the application 202 checks the status of the radio interface unit 220, via the telephony unit 206, to confirm the radio interface unit 220 is not receiving a telephone call. While the audio signal is transmitted to the speaker 124, the application 202 checks the status of the radio interface unit 220 via the telephony unit 206. If the radio interface unit 220 is still “AT REST,” the application 202 transmits the audio signal to the speaker 124 via the application audio unit 208 and the audio switch unit 118, in step 420. If the radio interface unit 220 transmits an “IN CALL” flag to the telephony unit 206, the transmission of the audio signal to the speaker 124 stops, and the process moves to step 408. In step 422, the application 202 keeps the audio path 302 open while the audio signal is transmitted to the speaker 124 and the radio interface unit 220 remains at rest, and closes the audio path 302, in step 424, when the audio signal transmission is complete.
FIG. 5A depicts the audio switch unit 118 with an audio path 500 opened between the application audio unit 208 and radio audio unit 224. This configuration allows for an application 202 to send a pre-recorded audio signal to the radio interface unit 220 for transmission across the wireless network. FIG. 5B depicts a schematic representation of the process used to transmit a prerecorded audio signal over a wireless network via the radio interface unit 220. In step 502, the application 202 requests the transmission of a prerecorded audio signal over the wireless network via the radio interface unit 220. In step 504, the application 202 checks the status of the radio interface unit 220 via the telephony unit 206. If the radio interface unit 220 returns an “AT REST” status, the application 220 returns to step 502 to wait for a call to be initiated. If the radio interface unit 220 returns an “IN CALL” status, the application 202 requests the audio path 500 be opened between the radio interface unit 220 and the application 202 in step 508. The application may also initiate a call to another device via the telephony unit 206, by sending an “INITIATE CALL” flag to the radio interface unit 226.
In step 510, the audio switch unit 118 opens an audio path 500 between the application 202 and the radio interface unit 220, by first closing the audio path 304 between the radio interface unit 220 and the microphone 126, and opening the path between the application 202 and the radio interface unit 220 via the application audio unit 208 and the radio audio unit 224. In step 512, the application 202 transmits the audio signal through the audio path 500 via the application audio unit 208. The radio audio unit 224 receives the audio signal from the application audio unit 208, and passes the audio signal through a plurality of filters that prepare the audio signal for transmission over the wireless network, via the hardware driver unit 226. After the audio signal transmission is complete, the audio switch unit 118 may close the audio path 500. The application 202 may also keep the audio path 500 open until the radio interface unit 220 indicates that the call is terminated. If the audio path 500 remains open while the call is active, audio received from the wireless network may be sent to the application 202 where it may be saved in the memory 114, or the secondary storage unit 122, of the mobile communications device 100.
FIG. 5C depicts a schematic representation of the process used to transmit an analog signal from an application 202 to the wireless network when a call is received. In step 550, the application 202 receives an indication from the radio interface unit 220 that a call is incoming. The radio interface unit 220 may transmit an “IN CALL” flag to the application 202 via the telephony unit 206. The radio interface unit 220 may also transmit information on the call such as, but not limited to caller identification information, caller location, or any other information related to the call to the application 202 via the telephony unit 206. In step 552, the application 202 confirms it is configured to auto answer an incoming call. The application 202 may use the caller information transmitted by the radio transmission unit 220 to determine if the call is to be auto answered. As an illustrative example, the application 202 may only answer calls from callers on a predefined caller list that is stored in the memory 114 of the device 100. The application 202 may also ignore calls from users on the caller list. The application 202 may also prompt a user of the mobile communication device 100 whether to answer the call by displaying a message on the display 120. If the application is not configured for auto answer, the application 202 ends. If the application 202 is configured to auto answer a call, the telephony unit 206 transmits an “AUTO ANSWER” flag to the radio interface unit 220.
In step 554, the radio interface unit 220, receives the “AUTO ANSWER” flag and does not request an audio path between the speaker 124, the microphone 126, or the external device 300. In step 556, the application 202 requests an audio path 500 between the application and the radio interface unit 220 via the application audio unit 208. In step 558, the audio switch unit 118 opens the audio path 500, and the radio interface unit 220 initiates the call over the opened audio path 500. The application 202 transmits the audio signal over the audio path 500 through the application audio unit 208 and the radio audio unit 224 after the radio interface unit 220 confirms the call is initiated via the telephony unit 206, and the driver unit 226 receives the audio signal from the radio interface unit 220, via the radio audio unit 224, and transmits the audio signal over the wireless network.
In step 560, the application 202 determines if the audio signal has completely transmitted over the audio path 500. If the audio signal has completely transmitted, the application 202 may request the audio path 500 be closed. The application 202 may also terminate the call by transmitting an “END CALL” flag from the telephony unit 206 to the radio interface unit 220. The application 202 may also maintain the audio path 500 until the user of the mobile device 100 receives the call by pressing a button displayed by the application 202 on the display 120 of the mobile communication device 100. If the user indicates that they would like to receive the call, the application 202 transmits an “IN CALL” flag to the radio interface unit 220, which requests the audio switch unit 118 close audio path 500 and open audio path 304.
The application 202 may analyze information from additional sources, such as a schedule application residing in, or external to, the mobile communication device 100, global positioning satellite (GPS) information, or any other user specific information to determine if the “AUTO ANSWER” flag should be turned on. As an illustrative example, the application 202 may query a scheduling application on the mobile communication device 100 to determine if the “AUTO ANSWER” flag should be turned on. The application 202 may transmit the “AUTO ANSWER” flag to the radio interface unit 220 when a user receives a call when they are in a scheduled event. To determine if the user is in a scheduled event, the application 202 may compare the current time and date to a starting and ending time and date in the user's schedule to determine if the event is in progress. If the event is in progress, the application will send the “AUTO ANSWER” flag to the radio interface unit when a call is in coming.
The user may also supply a listing of authorized phone numbers that should not be auto answered during the event. As another illustrative example, a user may designate a specific phone number to pass through to the phone during the event such as a family member, or a client, calling the user. When the indicated phone number is transferred to the telephony unit 206 from the radio interface unit 220, as part of the call information, the application 202 will transmit an “ACCEPT CALL” signal to the radio interface unit 220 instructing the radio interface unit 220 to open the audio path to the speaker 124 and microphone 126. The application 202 will not open an audio path between the radio interface unit 220 and the speaker 124 if the caller information is not in the list of authorized phone numbers.
The application 202 may also look to multiple pieces of information to determine if the “AUTO ANSWER” flag should be transmitted to the radio interface unit 220. As an illustrative example, the application 202 may analyze the schedule information and the GPS position of the user to determine if the user is at the location of the meeting. If the user is at the location of the meeting, the “AUTO ANSWER” flag is transmitted to the radio interface unit 220 when a call is incoming. If the user is not at the location indicated by the schedule information the “AUTO ANSWER” is not transmitted.
The application 202 may also automatically open an audio path 304 from the radio audio unit 224 to the speaker 124 when a call from a specific device is received. As an illustrative example, the application 202 may receive caller information, and an “IN CALL” flag, from the radio interface unit 220 via the telephony unit 206. The application 202 may compare the received caller information, such as the phone number of the device calling in, to an authorized list of phone numbers stored in the memory of the mobile communication device 100, and may automatically accept the call and open an audio path to the speaker 124 and microphone 126 when the caller information matches a predefined caller stored in authorized list. Since the audio channel is open on both devices an intercom affect is achieved where both parties can communicate with one another over the wireless network.
FIG. 5D depicts a schematic representation of a mobile device capable of transmitting video over a wireless network. Consistent with this embodiment, the mobile communication device 100 includes a video switching unit 574, an application video unit 570, and a video radio unit 572. The video switch unit 574 is configured to receive a video signal from the application 202, via the application video unit 570, and to transfer the video signal to the radio video unit 572 via the video signal path 576. The application video unit 570 is also configured to format the video signal into a format operable with the radio video unit 572. The radio video unit 572 may also include a plurality of filters to format the video signal for transmission over the wireless network by the hardware driver 226. The mobile communication device 100 may simultaneously transmit video and audio signals over the wireless network via the hardware driver 226. The transmission of the video signal may be initiated by any of the means previously discussed, such as, the receipt of a phone call from an authorized phone number. The video signal may be generated by a camera 578 optically coupled to the application processing unit 102 via the IO unit 116. The camera 578 can be used to record, or generate, the video signal that is transmitted over the wireless network.
FIG. 6A depicts a configuration of the audio switch unit 118. The audio switch unit 118 is coupled to the speaker 124, microphone 126, application audio unit 208, and radio audio unit 224. The audio framework 206 and the radio audio unit 224 are coupled to the audio switch unit 118 via memory locations 602 and 606. The memory locations 602 and 606 may be partitions of the memory 114, or partitions of the secondary storage unit 122. Further, each memory location 602 and 606 may be partitioned into multiple memory locations.
The radio audio unit 224 stores audio signals received from the driver unit 226 in the memory 602, and the audio switch unit 118 extracts the stored audio form the memory location 602, and transmits the audio signal to the speaker 124 via the audio path 600. The audio switch unit 118 receives audio from the microphone 126, and stores the audio from the microphone 126 in the memory location 602 via audio path 604. The radio audio unit 224 extracts the audio signal from the memory location 602, and transmits the audio signal to the wireless network via the radio interface unit 220 and the driver unit 226. The radio audio unit 224 also stores audio signals received from the wireless network in memory location 602. Similarly, the external device 300 transmits and extracts audio signals from the memory 608 via audio path 606. The application audio unit 208 is also coupled to the memory location 602, and is configured to read and write audio signals into the memory location 602.
FIG. 6B depicts a schematic representation of a process to transmit an audio signal over a wireless network. In step 660, the application 202 requests transmission of an audio signal. In step 662, the application 202 checks the status of the radio interface unit 220 via the telephony unit 206. If the radio interface unit 220 returns an “AT REST” status, the application 202 waits for the status to change to an “IN CALL” status. The application 202 may also initiate a call by transmitting a “INITIATE CALL” flag to the radio interface unit 220 via the telephony unit 206. If the application 220 initiates the call, the radio interface unit 220 connects to the wireless network, via the driver unit 226, and performs all required functions to initiate the call over the wireless network. When the intended mobile device accepts the call, the radio interface unit 220 sends an “IN CALL” flag to the telephony unit 206, which forwards the “IN CALL” status to the application 202.
In step 664, the application 202 access the memory location 602 where audio transmitted to the wireless network is stored via the application audio unit 208. The application 202 may transmit a “VIRTUAL CALL” flag to the audio switch unit 118, which causes the audio switch unit 118 to close the audio path 604 between the microphone 126 and the memory location 602. The application 202 may also connect to the microphone 126 and prevent the microphone 126 from transmitting an audio signal to the memory 602.
In step 666, the application 202 routes the audio signal through the application audio unit 208, which formats the audio signal into a format compatible with the radio audio unit 224, and then stores the converted audio signal in the memory 602. The radio audio unit 224 extracts the audio signal from the memory location 602, and transmits the audio signal over the wireless network via the radio interface unit 220 and the driver unit 226. In step 668, the application audio unit 208 determines if the audio signal has been successfully stored in the memory location 602. If the storage is successful, the application 202 ends the process. If the storage is not successful, the application 202 attempts to store the audio signal a second time.
FIG. 7A depicts a schematic representation of the mobile device 100 connected to an external device 300 that transmits prerecorded audio signal over a wireless network. The external device 300 may be configured to receive audio signals from the application 202 via the application audio unit 208 over the audio path 700. The external device 300 includes a CPU 702 and a memory 704 that are configured to receive an audio signal from the application 202, reformat the audio signal into a format accepted by the radio audio unit 224, and transmit the reformatted audio signal to the radio audio unit 224 via the audio path 706. The audio signal may be stored in the memory 704 of the external device 300 for later transmission. The application 202 may also be communicatively coupled to the external device 300 via a separate wireless connection, or a data bus.
The application 202 may be communicatively coupled to the external device 300 using a wireless communication protocol such as blue tooth. The application 202 may also communicatively coupled to the external device by a wired data bus, such as a universal serial bus (USB) connection, in the external device 300 and in the mobile device 100. The application 202 may also be communicative coupled to the external device 300 by a network connection, such as a TCP/IP connection or Ethernet connection. The application 202 may also be connected to the external device 300 by a cradle that includes a serial or USB connection to the external device, the cradle being configured to hold the mobile communication device 100 in a predefined position.
FIG. 7B depicts a schematic representation of a process to transmit an audio signal from an external device over a wireless network thought the mobile device 100. When the external device 300 is connected to the mobile device 100, the application 202 requests an audio channel 700 between the external device 300 and the application 202 from the audio switch unit 118 via the application audio unit 208, in step 750. In step 752, the audio switch unit 118 opens the audio path 700 in response to a request from the application audio unit 208. In step 754, the application 202 transmits the audio signal to the external device 300 via the audio path 700. The external device 300 receives the audio signal, coverts the audio signal in to a format accepted by the radio audio unit 224, and stores the audio signal in the memory 704 in step 756.
After the external device 300 stores the audio file, the application 202 monitors the status of the radio interface device 220 via the telephony unit 206 in step 758. When the radio interface unit 220 transmits an “IN CALL” status to the telephony unit 206, the application 202 transmits an “ACCEPT CALL” flag to the radio interface unit 220, causing the radio interface unit 220 to connect the call via the driver unit 226 in step 760.
In step 762, the application 202 transmits an “START TRANSMISSION” signal to the external device 300 via an established wireless connection or hard wire connection between the external device 300 as previously discussed. In step 764, the external device 300 transmits the stored audio signal to the radio audio unit 224 via the audio path 706. The radio audio unit 224 filters the audio signal before sending the audio signal to the wireless network via the radio interface unit 220 and the driver unit 226.
In the present disclosure, the words “a” or “an” are to be taken to include both the singular and the plural. Conversely, any reference to plural items shall, where appropriate, include the singular.
It should be understood that various changes and modifications to the presently preferred embodiments disclosed herein will be apparent to those skilled in the art. Such changes and modifications can be made without departing from the spirit and scope of the present disclosure and without diminishing its intended advantages. It is therefore intended that such changes and modifications be covered by the appended claims.

## Claims

1. A mobile communication device including:
an application unit including
an application running in a first memory of the device,
an application audio framework in the first memory, the application audio unit being communicatively coupled to the application, and
a telephony unit in the first memory, the telephony unit being communicatively coupled to the application;

a radio transmission unit including
a radio interface unit operating in a second memory and communicatively coupled to the telephony unit,
a radio audio framework operating in the second memory, the radio audio framework being communicatively coupled to the radio interface unit, and
a hardware driver unit communicatively coupled to the radio interface unit, the hardware driver unit being configured to initiate a communication connection between the mobile communication device and another device;

an audio switching unit communicatively coupled to the application unit and the radio transmission unit,
wherein the application transmits an audio signal stored in the first memory over a wireless network via the audio switching unit and radio interface unit,
wherein the application unit transmits a different audio message depending on information provided from the radio transmission unit to the application unit, and
wherein the application instructs the radio interface unit to answer a call based on caller information stored in the first memory and caller information extracted from the wireless network by the radio interface unit.

2. The mobile communication unit of claim 1 Wherein the wireless network is a cellular wireless network.

3. The mobile communication unit of claim 1, wherein the application unit transmits the audio signal to the radio transmission unit in response to the radio transmission unit completing a two way communication path over the wireless network.

4. The mobile communication device of claim 1 including an external device having a processor and a memory, the external device being communicatively coupled to the radio transmission unit and the application unit using, separate communication paths,
wherein the external device is configured to transmit an audio signal received from the application unit over the wireless network via the radio transmission unit.

5. The mobile communication device of claim 4 wherein the external device is communicatively coupled to the application wirelessly using a blue tooth communication protocol.

6. The mobile communication device of claim 1 wherein
the application unit directs the radio transmission unit to initiate a telephone call to a telephony device, and the application unit transmits the audio signal after the radio transmission unit has initiated the telephone call.

7. The mobile communication device of claim 1 wherein the application unit opens a communication path to a speaker and a microphone coupled to the mobile communication device after the audio signal is successfully transmitted.

8. The mobile communication device of claim 1 wherein the application unit automatically transmits an audio signal to the radio transmission unit when call is connected by the radio transmission unit.

9. The mobile communication device of claim 1 wherein the information includes caller identification information.

10. A mobile communication device including an application unit including an application unit running in a first memory, a radio transmission unit operating in a second memory and communicatively coupled to the application unit, and an audio switching unit communicatively coupled to the application unit and the radio transmission unit, the mobile communication device performing the method of:
transferring an incoming call notification from the radio transmission unit to the application unit;
identifying formation provided from the radio transmission unit to the application unit;
based upon the information identified, transferring a call acceptance notification from the application unit to the radio transmission unit that causes the radio transmission unit to establish a two way communication with the device calling the device over a wireless network,
opening an audio path from the application unit to the radio transmission unit in the audio switching unit, and
transmitting an audio signal from the application unit to the wireless network; or
trasmitting a different audio message depending on information provided from the radio transmission unit to the application unit; and
closing the audio path in the audio switching unit when the audio has been completely transferred.

11. The method of claim 10 wherein the wireless network is a cellular network.

12. The method of claim 10 including an,
wherein an external device having a processor and a memory, that is communicatively coupled to the radio transmission unit and the application unit using separate communication paths is configured to transmit an audio signal received from the application unit over the wireless network via the radio transmission unit.

13. The method of claim 10 including a phone call from the application unit by directing the radio transmission unit to initiate a telephone call to a telephony device on the wireless network, and
transferring the audio signal after the radio transmission unit initiates a call between the two devices.

14. The method of claim 13 wherein the external device is communicatively coupled to the application wirelessly using a blue tooth communication protocol.

15. The method of claim 10 including the steps of opening, a communication path to a speaker and a microphone coupled to the mobile communication device after the audio signal is successfully transmitted.

16. A mobile communication device including:
an application unit including
an application running in a first memory of the device,
an application video unit in the first memory, the application video unit being communicatively coupled to the application, and
a telephony unit in the first memory, the telephony unit being communicatively coupled to the application;

a radio transmission unit including
a radio interface unit operating, in a second memory and communicatively coupled to the telephony unit,
a radio video unit operating in the second memory, the radio video unit being communicatively coupled to the radio interface unit, and
a hardware driver unit communicatively coupled to the radio interface unit, the hardware driver unit being configured to initiate a communication connection between the mobile communication device and another device; and

a video switching unit communicatively coupled to the application unit and the radio transmission unit,
wherein the application transmits a video signal stored in the first memory over a wireless network via the video switching unit and radio interface unit, and
wherein the application unit transmits a signal different from the video signal depending upon information provided from the radio interface unit to the application unit.