Patent Publication Number: US-8970486-B2

Title: Mobile device with user interaction capability and method of operating same

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This application is a division of U.S. utility patent application Ser. No. 12/641,830 entitled “Mobile Device With User Interaction Capability And Method Of Operating Same” filed on Dec. 18, 2009, which is a continuation-in-part of U.S. patent application Ser. No. 12/471,062, titled “Sensing Assembly For Mobile Device” and filed on May 22, 2009, and this application claims the benefit of both of the aforementioned applications, both of which are hereby incorporated by reference herein. 
    
    
     FIELD OF THE INVENTION 
     The present invention relates generally to mobile devices and, more particularly, to methods and systems capable of being implemented by mobile devices that facilitate interactions with one or more of those mobile devices. 
     BACKGROUND OF THE INVENTION 
     Mobile devices such as cellular telephones, smart phones, and other handheld or portable electronic devices such as personal digital assistants (PDAs), headsets, MP3 players, etc. have become increasingly popular and ubiquitous. As more and more people carry mobile devices with them, there is a desire that such mobile devices become capable of numerous functions, yet also be easy to use. 
     Conventional mobile devices have numerous touch-sensitive input actuation mechanisms, such as buttons, keypads, joysticks, touchscreens, etc. These input actuation mechanisms are often sometimes unwieldy depending upon the circumstance. This can be particularly true for some users, for example, those with larger hands or the elderly. In addition, the necessity of repeatedly entering various commands can be time consuming and non-intuitive. 
     Therefore, for the above reasons, there is an opportunity to develop a method and/or system that provides convenient user interaction functionality. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a front view of one embodiment of an exemplary mobile device described herein; 
         FIG. 2  is a block diagram illustrating exemplary components of the mobile device of  FIG. 1 ; 
         FIG. 3  is a further perspective view of the mobile device of  FIG. 1  shown in relation to an exemplary coordinate system; 
         FIG. 4  is a top view of the mobile device of  FIG. 1  being moved in a manner parallel to an X-Y plane defined by the coordinate system of  FIG. 3 ; 
         FIG. 5  is a top view of the mobile device in  FIG. 4  with a hand being waved over an infrared proximity sensor of the mobile device; 
         FIG. 6  is a flow chart illustrating exemplary steps of interfacing with the mobile device of  FIG. 1  to initiate a command; 
         FIG. 7  is a side view of the mobile device of  FIG. 1  along with a second exemplary mobile device situated in a flat orientation about a horizontal plane (X-Y plane); 
         FIG. 8  is an additional side view of the mobile devices of  FIG. 7 , which are now shown to be situated in orientations that are rotated relative to the horizontal plane; 
         FIG. 9  is another side view of the mobile devices of  FIG. 7 , where the first mobile device is orientated as shown in  FIG. 8  while the second mobile device is orientated as shown in  FIG. 7 ; 
         FIG. 10  is a further side view of the mobile devices of  FIG. 7  now shown in conjunction with one or more additional mobile devices; and 
         FIG. 11  is a flow chart illustrating exemplary steps pertaining to the interfacing of mobile devices situated in substantially similar and/or dissimilar orientations. 
     
    
    
     DETAILED DESCRIPTION 
     Methods, mobile devices, and systems with support for interactions with one or more mobile devices with acceleration and proximity sensing, are described below. In at least one embodiment, a mobile device including an accelerometer and infrared sensor is configured to associate commands (or, in some cases, to learn commands) through accelerometer sensing and then to actuate the commands based on infrared sensing, or vice-versa. The commands can include a plethora of possibilities. For example, commands for turning a page on an electronic book (e.g., eBook), changing TV channels, scrolling through a list or website (or web pages thereof), transferring a song to another mobile device, etc., can be implemented with a slight movement of the mobile device and the waving of a hand over the mobile device. In additional embodiments, such acceleration and infrared sensing is utilized to govern an interaction between a first mobile device and another mobile device based upon the first mobile device&#39;s orientation with respect to the other mobile device, such as when both devices are orientated flat on a horizontal surface. Upon determining appropriate interfacing between the mobile devices based upon the orientation of the mobile devices, a slight movement of the mobile device, and the waving of a hand over the mobile device can transfer data from one device to another. 
     More particularly, one embodiment relates to a method of operating a mobile device The method includes sensing at least one of an orientation and a movement of the mobile device, selecting a command based on the sensed orientation or sensed movement, and executing the command upon sensing a proximity of an object in relation to at least a portion of the mobile device. An additional embodiment relates to a method of operating a first mobile device in relation to a second mobile device. The method includes sensing a first orientation of the first mobile device relative to a reference orientation and receiving, from the second mobile device, information concerning a second orientation of the second mobile device relative to the reference orientation. The method additionally includes determining whether a first criterion concerning a similarity between the first orientation and the second orientation has been met, and transferring first data from the first mobile device to the second mobile device upon sensing a triggering event, provided that the first criterion has been met. 
     An additional embodiment involves a mobile device. The mobile device includes a processor, a wireless transceiver coupled to the processor, and an accelerometer coupled to the processor to provide a first signal to the processor indicative of a first orientation, first movement, or first acceleration of the mobile device. The mobile device further includes an infrared proximity sensor, coupled to the processor, for providing a second signal indicative of a presence of an object in proximity to the infrared proximity sensor. The processor determines based at least in part upon the first signal whether a first criterion has been met and, upon determining that the first criterion has been met, enters a first state in which the processor is prepared to execute a command upon receiving the second signal. Further, the processor, upon receiving the second signal, executes the command. 
       FIG. 1  shows an exemplary mobile device  102  that includes, among its various components, an accelerometer  104  (shown in phantom), such as a gravimeter, an electronic compass  105  (shown in phantom), and an infrared proximity sensor  106 , in accordance with a first embodiment. In the present example, the mobile device  102  is a personal digital assistant (PDA), albeit the mobile device is also intended to be representative of a variety of other mobile devices as well, including for example, cellular telephones, smart phones, other handheld or portable electronic devices such as notebook, netbook, or laptop computing devices, remote controllers, headsets, MP3 players and other portable video and audio players, global positioning navigation devices, and even other electronic devices, including a wide variety of devices that can utilize or benefit from control based upon the sensed presence of one or more external objects (e.g., electronic displays, kiosks, ATMs, vending machines, vehicles, etc.). Further included among the components of the mobile device  102  as shown in  FIG. 1  are a video screen  108 , a keypad  110  having numerous keys, and a navigation key cluster (in this case, a “five-way navigation key cluster”)  112 . Although an electronic compass  105  is included separately with the exemplary embodiment to assist with orientation sensing, in at least some embodiments, the acceleration sensor  104  provides orientation sensing without the addition of the electronic compass  105 . 
       FIG. 2  illustrates example internal components  200  of a mobile device, such as the mobile device  102 . This embodiment includes one or more wireless transceivers  202 , a processor  204  (e.g., a microprocessor, microcomputer, application-specific integrated circuit, etc.), a memory portion  206 , one or more output devices  208 , and one or more input devices  210 . In at least some embodiments, a user interface component (e.g., a touch screen) is considered both an output device  208  and an input device  210 . The internal components  200  can further include a component interface  212  to provide a direct connection to auxiliary components or accessories for additional or enhanced functionality. The internal components  200  preferably also include a power supply  214 , such as a battery, for providing power to the other internal components while enabling the mobile device  102  to be portable. As will be described in further detail, the internal components  200  in the present embodiment further include sensors  228  such as the infrared proximity sensor  106 , the accelerometer  104 , and the electronic compass  105  of  FIG. 1 . All of the internal components  200  can be coupled to one another, and in communication with one another, by way of one or more internal communication links  232  (e.g., an internal bus). 
     Each of the wireless transceivers  202  utilize a wireless technology for communication, such as, but not limited to, wireless wide area network (WWAN) technologies such as analog communications (using AMPS), digital communications (using CDMA, TDMA, GSM, iDEN, GPRS, EDGE, etc.), and next-generation communications (using UMTS, WCDMA, LTE, IEEE 802.16, etc.) or variants thereof, or peer-to-peer or ad hoc communication technologies such as HomeRF, Bluetooth® and IEEE 802.11 (a, b, g or n), or other wireless communication technologies such as infrared technology. In the present embodiment, the wireless transceivers  202  include both a WWAN transceiver  203  and a wireless personal area network (WPAN) transceiver  205  (which particularly can employ Bluetooth® technology), although in other embodiments only one of these types of wireless transceivers (and possibly neither of these types of wireless transceivers, and/or other types of wireless transceivers) is present. Also, the number of wireless transceivers can vary and, in some embodiments, only one wireless transceiver is present and further, depending upon the embodiment, each wireless transceiver  202  can include both a receiver and a transmitter, or only one or the other of those devices. 
     Exemplary operation of the wireless transceivers  202  in conjunction with others of the internal components  200  of the mobile device  102  can take a variety of forms and can include, for example, operation in which, upon reception of wireless signals, the internal components detect communication signals and the transceiver  202  demodulates the communication signals to recover incoming information, such as voice and/or data, transmitted by the wireless signals. After receiving the incoming information from the transceiver  202 , the processor  204  formats the incoming information for the one or more output devices  208 . Likewise, for transmission of wireless signals, the processor  204  formats outgoing information, which may or may not be activated by the input devices  210 , and conveys the outgoing information to one or more of the wireless transceivers  202  for modulation to communication signals. Depending upon the embodiment, the wireless transceiver(s)  202  can convey the modulated signals to, or receive modulated signals from, a remote device, such as a cell tower, an access point, or a remote server (not shown), and/or from another mobile device that is located remotely (including, for example, in the case where two mobile devices are in communication via a Bluetooth® link). 
     Depending upon the embodiment, the output devices  208  of the internal components  200  can include a variety of visual, audio, and/or mechanical output devices. For example, the output device(s)  208  can include a visual output device  216  such as a liquid crystal display and light emitting diode indicator, an audio output device  218  such as a speaker, alarm and/or buzzer, and/or a mechanical output device  220  such as a vibrating mechanism. The visual output devices  216  among other things can include the video screen  108  of  FIG. 1 . 
     Likewise, the input devices  210  can take a variety of forms. For example, the input devices  210  can include a visual input device  222  such as an optical sensor (for example, a camera), an audio input device  224  such as a microphone, and a mechanical input device  226  such as a flip sensor, keyboard, keypad, selection button, touch pad, touchscreen, capacitive sensor, or motion sensor. The mechanical input device  226  can also in particular include, among other things, the keypad  110  and the navigation key cluster  112  of  FIG. 1 . Actions that can actuate one or more of the input devices  210  can further include, but need not be limited to, opening the mobile device, unlocking the device, moving the device to actuate a motion, moving the device to actuate a location positioning system, and otherwise operating the device. 
     In at least some circumstances, the sensors  228  are considered as input devices  210 . In particular as shown, the sensors  228  can include both proximity sensors  229  and other sensors  231 . As will be described in further detail, the proximity sensors  229  can include, among other things, one or more sensors such as the infrared proximity sensor  106  of  FIG. 1  by which the mobile device  102  is able to detect the presence (or passing) of an external object, including portions of the body of a human being such as a hand (not shown). By comparison, the other sensors  231  can include a variety of other types of sensors such as, for example, a variety of circuits and sensors capable of allowing orientation/location determinations (and/or related determinations, such as determinations concerning velocity or acceleration) to be made including, for example, the accelerometer  104  and electronic compass  105  of  FIG. 1 . In addition, other devices/components, such as a gyroscope or other information collecting device(s) that can identify a current location or orientation of the mobile device  102 , can be present depending upon the embodiment. 
     The memory portion  206  of the internal components  200  can encompass one or more memory devices of any of a variety of forms (e.g., read-only memory, random access memory, static random access memory, dynamic random access memory, etc.), and can be used by the processor  204  to store and retrieve data. The data that is stored by the memory portion  206  can include, but need not be limited to, operating systems, applications, and informational data. Each operating system includes executable code that controls basic functions of the communication device, such as interaction among the various components included among the internal components  200 , communication with external devices via the wireless transceivers  202  and/or the component interface  212 , and storage and retrieval of applications and data to and from the memory portion  206 . Each application includes executable code that utilizes an operating system to provide more specific functionality for the communication devices, such as file system service and handling of protected and unprotected data stored in the memory portion  206 . Informational data is non-executable code or information that can be referenced and/or manipulated by an operating system or application for performing functions of the communication device. 
       FIGS. 3-5  depict the mobile device  102  of  FIG. 1  in several different contexts. More particularly,  FIG. 3  provides a perspective view of the mobile device  102  showing the mobile device in relation to an exemplary coordinate system that in this case is a conventional 3-D coordinate system having X, Y and Z axes that are each perpendicular with respect to one another. In the present embodiment, the accelerometer  104  can be used to measure static acceleration, such as the tilt of the mobile device relative to gravity, as well as dynamic acceleration, such as that resulting from motion, shock, or vibration of the mobile device. This information can be used to provide acceleration, motion, and orientation information for the mobile device. In addition, in conjunction with other information (e.g., information regarding an initial orientation and/or velocity of the mobile device), it can be used to further determine a change in the orientation and/or velocity of the mobile device  102 . As one example in this regard,  FIG. 4  depicts the mobile device  102  with an exemplary partly-translational, partly-rotational movement. The movement, shown in  FIG. 4  particularly, is representative of a common type of movement that can be experienced by the mobile device  102 , in which the mobile device  102  is oriented substantially flat on a surface, such as a tabletop  410 , countertop, motor vehicle console, etc., and subsequently angled to one side by a user so as to arrive at a second orientation, as represented by a second image of the mobile device  412  (shown in phantom). Upon moving the mobile device to the second orientation, the mobile device  102  can be left there or returned to its original resting orientation. The mobile device  102  can also be held in hand instead of being orientated flat on a surface as it undergoes a similar motion as described above with reference to  FIG. 4 . 
     In addition to sensing motion, the mobile device  102  infrared proximity sensor  106  is capable of sensing an object that is present in proximity to it. As shown in  FIG. 5 , in one embodiment the infrared proximity sensor  106  operates by transmitting an infrared signal  314  generated by at least one infrared phototransmitter (e.g., a photo-light emitting diode (photo-LED)). An object that is present such as a hand  516 , then reflects portions of the infrared signal  314  to constitute at least one reflected signal (e.g., a reflected signal also proceeding along the same general path as the infrared signal  314 ). The reflected signal is in turn sensed by at least one photoreceiver (e.g., photodiode), which is also part of the infrared proximity sensor. In some embodiments, it is sufficient for infrared proximity sensing that the infrared proximity sensor  106  have only a single infrared phototransmitter and a single infrared photoreceiver. However, in alternate embodiments a variety of other types of infrared proximity sensor arrangements can be employed including, for example, the use of multiple proximity sensors (each with potentially its own phototransmitter and photoreceiver) positioned at multiple locations on the mobile device, as well as the use of any of a variety of different types of pyramid-type sensing assemblies such as those described in pending U.S. patent application Ser. No. 12/471,062 entitled “Sensing Assembly for Mobile Device” and filed on May 22, 2009, which is hereby incorporated by reference herein. Other types of proximity sensors can also be used such as, but not limited to, ultrasonic, capacitive, inductive, resistive, RF, and camera type image sensors. 
     As discussed in further detail below, in at least some embodiments it is possible for the mobile device  102  to interface with a user or other mobile device(s) based upon the combination of sensed motion information obtained using the accelerometer  104 , and sensed presence/proximity information obtained using the infrared proximity sensor  106 . More particularly, in such embodiments, the mobile device  102  can interpret one or more particular sensed motions as being respectively indicative of selecting one or more particular commands. The sensing of the motions does not cause the mobile device  102  to execute the commands corresponding to those motions, but rather cause the mobile device to enter into a state of readiness in which the mobile device is then receptive to trigger signals sensed by way of the infrared proximity sensor  106  or other types of proximity sensors. Thus, when a trigger signal is received, the mobile device executes those commands. The trigger signal can include one or more of numerous signals received from various components, for example, signals from the infrared proximity sensor, a push-button, and motion sensing devices. In the present embodiment, upon sensing movement of the mobile device  102  in the manner shown in  FIG. 4 , the mobile device then becomes ready to execute a command or operation corresponding to that particular movement. The mobile device does not execute that command or operation until it senses the presence of the hand  516  in proximity to (or movement of the hand across) the infrared proximity sensor  106  as represented by  FIG. 5 . The mode and context of the mobile device  102  can in part aid with the interpreting the command, for example, holding the mobile device at an angle and displaying pictures, or holding or laying the mobile device in a stationary horizontal position during a hands-free phone call. Further, the proximity sensor  106  can be utilized to sense a temporarily-present object (e.g., an object passing by) or a relatively stable presence of an object, with the length of presence being indicated by the amount of time the proximity sensor  106  provides a “high” sensing signal. In addition, this sensing can be used to direct the execution of different commands based on the time duration. 
       FIG. 6  shows one exemplary manner of interfacing with the mobile device  102  to initiate a command. As shown, after starting the operation at step  602 , at step  604  the mobile device  102  is placed in a substantially motionless orientation for a preset amount of time, as detected by a lack of significant acceleration in any direction. As this occurs, the processor  204  (see  FIG. 2 ) of the mobile device  102  senses the relative motionlessness (i.e., motion is less than a predetermined threshold). In at least some cases, the processor  204  at this time is also able to determine the current coordinates (e.g., X, Y, and Z coordinates along the coordinate axes X, Y, and Z of  FIG. 3 ) of the device and store them in the memory  206  (see  FIG. 2 ). Such determinations can be made using only the accelerometer  104 , assuming that the mobile device  102  is continuously using the accelerometer  104  to detect and record ongoing movement of the mobile device over time relative to an initial starting location (the coordinates of which can be set by a user or preset at a factory), and/or using accelerometer information in conjunction with other information such as that provided by a GPS receiver. 
     The relative motionlessness of the mobile device  102  as sensed at step  604  in the present embodiment serves as a cue to the mobile device that the mobile device is potentially about to be moved in a manner that signifies that a command selection is forthcoming. Thus, at step  606 , the mobile device  102  is waiting to sense motion and at step  608  a determination is made by the mobile device  102  as to whether motion is detected. If motion is not detected at step  608 , then the process returns to the step  604 . Alternatively, if motion is detected at step  608 , the process advances to a step  610 , at which the processor  204  uses the accelerometer  104  to track the motion of the mobile device  102  during movement. In some cases, the processor  204  actually determines the specific orientation variation experienced by the mobile device  102 , by calculation by using double integration, assuming a known starting orientation, regardless of whether the device is in hand or resting on a surface. In other cases, the processor  204  merely monitors the variation in acceleration experienced by the mobile device  102  and sensed by the accelerometer  104  (also, in some embodiments, velocity can be specifically determined/monitored, as in the case where the mobile device starting orientation is not stationary). Still in other cases, the electronic compass  105  can be used to supplement the acceleration sensor  104  by further monitoring the motion of the mobile device  102 . The motion is tracked until the mobile device becomes relatively stationary (i.e., motion sensed is less than a predetermined threshold). To the extent that the mobile device  102  is located within a moving vehicle (e.g., on the dashboard of a car), in some embodiments further adjustments to the above process can be made to take into account the motion of the mobile device due to the movement of the vehicle. 
     Next, at step  612 , the processor  204  compares the tracked movement to a list of numerous predefined/pre-stored motions, such as angling of the mobile device  102  to the left from a resting orientation along the arrow  411  as shown in  FIG. 4 . Then at step  614 , the processor  204  searches the memory  206  for preselected commands associated with the motion that has been sensed. The preselected commands and their associated movements can be provided to the mobile device  102  in various manners, for example, as preset information provided by the mobile device manufacturer, through application software, or as specified by a user who has programmed the mobile device according to the user&#39;s own preferences. In some cases, it is desirable that a given movement be associated with a given command that is intuitively associated with such movement. For example, when viewing an eBook on the mobile device, a clock-wise (CW) twitching motion can be used to command the device to show a subsequent page and a counter-clock-wise (CCW) twitching motion can be used to view a preceding page. Assuming that there is in fact a particular command that is associated with the tracked movement, at step  616  the processor  204  marks the particular command identified in step  614  and the mobile device  102  can enter a state of readiness to perform that command, wherein the mobile device  102  awaits a trigger signal before executing the command. More particularly, in at least one embodiment, the state of readiness can include loading an application start command or other executable corresponding to that command into the memory  206  for retrieval or execution during step  622 . 
     In the present embodiment, the infrared proximity sensor  106  serves as a trigger capable of providing a trigger signal to the processor  204 . Thus, upon loading in the preselected command at step  616 , at step  618  the processor  204  activates the transmitter portion of the infrared proximity sensor  106  to transmit the infrared signal  314  outward from the mobile device. Notwithstanding step  618 , in some embodiments the infrared proximity sensor  106  is continuously operational and need not be specifically activated. Next, at step  620 , based upon signals from the infrared proximity sensor  106  the processor  204  determines whether an object is present (or passing) in proximity to the infrared proximity sensor. For example, if the infrared proximity sensor  106  senses a reflected infrared signal indicating that an object such as the hand  516  of  FIG. 5  has been detected, then the infrared proximity sensor  106  provides a signal back to the processor  204  indicating that an object is proximal, and thus the processor determines the presence of the object. 
     Lacking the detection of an object at step  620 , the process returns to step  618  for a duration of time or until a signal is received to return to step  602 . However, upon detection of an object at step  620 , the process advances to a step  622 , executing the previously-selected command. In some embodiments, a single performance of the command at step  622  ends the process. However, in alternate embodiments it is possible for a user to repeatedly reexecute the preselected command. In such embodiments, upon completion of the step  622 , at step  624  the processor  204  determines whether the mobile device  102  is configured for multiple executions of the same command. If the mobile device  102  is not so configured, then the process ends (or, as shown, the process returns to the step  602 ). However, if the mobile device  102  is so configured, then the process continues to step  625  where the mobile device  102  verifies that a terminate execution directive has not been sensed. If no directive has been sensed, then the process returns to the step  618 , to determine whether the infrared proximity sensor  106  again senses an object. Thus, a user can repeatedly issue the same command by providing an object in proximity to the infrared proximity sensor  106  repeatedly (e.g., by waiving the hand  516  back and forth repeatedly across the mobile device). Alternatively, if a terminate execution directive has been sensed (e.g. timer expiration, input signal, etc) at step  625 , then the process returns to step  602 . 
     As discussed above, the use of the accelerometer  104  and the infrared proximity sensor  106 , particularly in combination, provides functionality to the mobile device  102  that significantly increases the intuitive use of the mobile device  102  for a plethora of applications. In one exemplary embodiment for example, when using an application that allows for viewing an ebook on the mobile device  102 , the mobile device can have a preselected command that correlates the command of turning a page forward with a twitching motion of the mobile device to the left thereby allowing the user to provide a single twitch to load the page turn command and then subsequently wave a hand over the mobile device  102  each time the viewer wishes to turn the page forward. In another example, the preselected command corresponding to a right twitch motion can be a pairing command for initiating pairing with another mobile device within range of the mobile device  102  using a communication protocol such as Bluetooth®. The user passing a hand over the mobile device can then subsequently achieve establishment of the pairing. 
     In addition to the above-described embodiments, also encompassed herein are embodiments in which the interfacing of a mobile device such as the mobile device  102  with another mobile device is influenced or governed based upon infrared proximity information and at least one of sensed acceleration and orientation. More particularly, referring now to  FIGS. 7-10 , in one exemplary embodiment of this type the relative orientations of one or more additional mobile devices  702 ,  1004 ,  1005 ,  1006  in addition to the mobile device  102  with respect to a given coordinate system are determined and used by the mobile device  102  to govern its interaction in terms of determining whether each mobile device should be included or excluded in its communications with one or more of the other devices (e.g., in terms of data transfers, etc.). For purposes of this exemplary embodiment, it can be understood that each of the mobile devices  702 ,  1004 ,  1005 , and  1006  is identical to the mobile device  102  as described above, although this need not be the case in other embodiments. In particular, for purposes of the present example, each of the mobile device  102 ,  702 ,  1004 ,  1005 ,  1006  includes at least one of an accelerometer and an electronic compass (e.g., the accelerometer  104  and/or the electronic compass  105 ) for monitoring its orientation along the coordinates of a coordinate system (which can be a shared coordinate system recognized by each of the devices) as well as an infrared proximity system. The use of the electronic compass in addition to an accelerometer can be particularly helpful where the orientation of the mobile device in relation to the north, south, east and west directions is of interest, rather than merely the orientation of the mobile device relative to the up/down (vertical) direction. 
     Referring still to  FIGS. 7-10 , side views along the X-axis are provided for two mobile devices  102 ,  702  in  FIGS. 7-9  and then additionally for three mobile devices  1004 ,  1005 , and  1006  in  FIG. 10 , with the mobile devices exhibiting various different rotational orientations in the different figures. More particularly, the mobile devices  102 ,  702  are both depicted in  FIG. 7  as being orientated so as to be generally parallel to the X-Y plane defined by their common coordinate system. It will be understood that the X-Y plane could correspond to, or be parallel to, a flat surface such as a table top upon which the mobile devices  102 ,  702  are supported. By comparison,  FIG. 8  depicts the mobile devices  102 ,  702  as depicted as being rotated by angles α and β in the z direction, respectively, about axes parallel to the X-axis relative to their orientations shown in  FIG. 7 . Despite the rotations shown, it will be noted that each of the mobile devices  102 ,  702  remain parallel to one another (albeit not parallel to the X-Y plane) and thus have the same orientation. As for  FIG. 9 , there the mobile device  102  remains rotated at the angle α relative to the horizontal orientation shown in  FIG. 7 , while the mobile device  702  has returned to the horizontal orientation shown in  FIG. 7 , and consequently the mobile devices  102 ,  702  shown in  FIG. 9  do not share the same orientation. Finally, in  FIG. 10  each of the mobile devices  102 ,  702 ,  1004 , and  1005  are orientated in the same horizontal manner as shown in  FIG. 7 , while the mobile device  1006  is rotated away from horizontal by an angle. 
     Referring to  FIG. 11 , the relative orientation of the mobile devices influences the manner in which the mobile devices  102 ,  702 ,  1004 ,  1005  and  1006  (shown in  FIGS. 7-10 ), interact with one another. Although the steps of  FIG. 11  are discussed below as being performed by the first mobile device  102 , each of the other mobile devices  702 ,  1004 ,  1005 , and  1006  can equally perform those steps. In the embodiment of  FIG. 11 , upon starting operation at step  1102 , at step  1104  the first mobile device  102  is preconfigured with a list of additional mobile devices with respect to which it can potentially be paired. In addition, the first mobile device  102  at step  1105  monitors its own tilt and movement (static and dynamic accelerations) through the accelerometer  104 . Next, at step  1106 , the first mobile device  102  detects a resting orientation, where the mobile device tilt is measured by the accelerometer  104  along with a lack of acceleration as sensed by the accelerometer  104 , signals the processor  204  ( FIG. 2 ) to calculate the current orientation in Z of that mobile device. In the present embodiment, this current orientation is determined in relation to a shared reference point or at least shared reference plane that is common to all of the mobile devices  102 ,  702 ,  1004 ,  1005  and  1006 , such as the horizontal X-Y plane. Upon determining this current orientation, the orientation information is stored in the memory  206  (see  FIG. 2 ) of the first mobile device  102 . 
     Further, at step  1108 , the first mobile device  102  is then automatically paired to at least one mobile device to which the first mobile device  102  is capable of being paired and that was listed in the step  1104 . In at least some embodiments, the mobile devices to which the first mobile device  102  can be paired are those devices that are sufficiently proximate to the first mobile device (within communication range i.e. Bluetooth®, etc.). For example, the first mobile device  102  can be paired with each of the other mobile devices  702 ,  1004 ,  1005  and  1006  shown in  FIG. 10  by way of a communication link, such as Bluetooth®, peer-to-peer (P2P), ad hoc, etc., assuming that all of those other mobile devices are sufficiently close to the first mobile device  102  so as to be in communication range of the first mobile device. Notwithstanding the pairing that occurs in the step  1108 , at a further step  1110  a listing of the mobile devices that have been paired with the first mobile device  102  is reviewed by the first mobile device and unwanted pairings can be deactivated (it is possible that in some instances one or more of the paired devices, even though listed on the preconfigured list of acceptable devices, should be decoupled from the first mobile device). For example, the mobile device  1005  of  FIG. 10 , despite being initially paired with the first mobile device  102  in the step  1108 , can be manually decoupled from the first mobile device in the step  1110 . 
     Next at step  1112 , the first mobile device  102  communicates with the remaining paired mobile device(s)  702 ,  1004 ,  1006  to ascertain their orientations, using wireless communication links (again, for example, Bluetooth® links). It should be understood that, during this time, not only is the first mobile device  102  monitoring its own orientation by way of its sensors  231  ( FIG. 2 ) (e.g. accelerometer  104  and electronic compass  105 ), but also similarly each of the other mobile devices  702 ,  1004 , and  1006  with which the first mobile device is paired also have been monitoring their orientations (vis-à-vis the common reference frame) via their own sensors (not shown). Thus, at step  1112 , upon request of the first mobile device  102 , each of the other mobile devices  702 ,  1004 , and  1006  is in a position to provide its respective current orientation, with respect to gravity for example, to the first mobile device. 
     Upon receiving current orientation information from the other mobile devices  702 ,  1004 ,  1006 , at step  1114 , the processor  204  in the first mobile device  102  then compares the detected orientation(s) of the paired mobile device(s)  702 ,  1004 ,  1006 , with its own orientation to determine which devices are situated in the same or a substantially similar orientation. For example, with respect to  FIG. 10  the mobile devices  702  and  1004  are in the same orientation as the mobile device  102 , while the mobile device  1006  has a different orientation, while with respect to  FIG. 8  the mobile device  702  is in substantially the same orientation as the mobile device  102  (it being understood that the angle α is approximately equal to the angle β), and with respect to  FIG. 9  the mobile device  702  is in a substantially different orientation than the mobile device  102 . Upon performing the comparisons at step  1114 , the first mobile device  102  then utilizes the orientation information to govern further interactions between the first mobile device  102  and the other mobile devices  702 ,  1004 , and  1006  with which it is paired. 
     For example, in at least some embodiments, once the mobile devices  102 ,  702 ,  1004  and  1006  are paired, a user can precipitate a file-sharing or data transfer event by which information (e.g., a document, text message, music file, etc.) is transmitted from the first mobile device  102  to appropriate ones of the other mobile devices  702 ,  1004 , and  1006 . The user causes this to occur by generating a triggering event. In at least some embodiments, the triggering event can include for example, sensing an object passing over the first mobile device  102 , pushing a button on the device  102 , moving the device in a certain direction, etc. In one embodiment, the object is passed over the first mobile device  102  such that, at step  1116 , the first mobile device  102  senses presence of the object via the infrared proximity sensor and identifies the motion as a triggering event. The particular data for transfer can be specified by the user (or otherwise determined) in any of numerous ways. For example, the user can have highlighted a particular file shown in a list of such files on the screen  108  by scrolling to that file and pressing one of the buttons on the keypad  110 . It should be noted that the transferring of data typically involves transmitting the data from the first mobile device  102  to others of the mobile devices without deleting the data stored at the first mobile device (e.g., copying of the data), albeit in other embodiments the data can be deleted at the first mobile device after being transmitted. 
     Continuing the process, upon the mobile device sensing the triggering event to transfer data, at step  1118  the first mobile device  102  executes the command to transmit data to the one or more other mobile devices that have been identified as being appropriately orientated. For example, referring to  FIG. 10 , if the first mobile device was configured to transfer data to only mobile devices substantially similarly oriented to the first mobile device  102 , the mobile devices  702  and  1004  would receive the data transfer, but the mobile device  1006  would not receive the data due to its substantially dissimilar orientation. In at least some other embodiments, rather than selecting devices that have substantially similar orientations to itself, the first mobile device  102  instead can be configured to select specific orientations relative to the X, Y, or Z axes of other mobile devices that are dissimilar to its own. For example, assuming that the first mobile device  102  is oriented on a podium with an angle elevation α of about 45 degrees with respect to the horizontal, the first mobile device can determine the desired recipient mobile devices as being those mobile devices that are situated on a surface that is flat with respect to the horizontal, such as a desktop. Upon transferring of the data at step  1118 , at step  1120  the first mobile device  102  then considers whether it is configured for multiple data transfers, which might occur for example upon a user waving at the first mobile device  102  repeatedly. If so, the process returns to the step  1116  (resulting in additional sensing of presence and additional transfers of data) while, if not, the process ends at step  1122 . 
     Notwithstanding the above description, many other embodiments are possible as well. For example, in at least some other embodiments the sending of data from the first mobile device  102  to the other mobile devices  702 ,  1004 , and  1006  (or other interactions between the first mobile device  102  and the other mobile devices) at steps such as step  1118  of  FIG. 11  is triggered not as a result of an object being sensed near the first mobile device but rather as a result of another triggering event. In some such embodiments, for example, the presence or movement of an object such as a user&#39;s hand (or other object or one or more object portions) in relation to the infrared proximity sensor  106  of the first mobile device  102  is detected by way of the sensor and in turn provides the triggering event for the data transfer. Additionally, in other such embodiments, the triggering event can include other inputs, such as pushing a button or creating a motion with the mobile device (e.g., twitching the mobile device). Further, in some such embodiments, the triggering of multiple data transfer events can occur respectively each time an object (such as a hand) passes the infrared proximity sensor  106 . For example, with each triggering event, a subsequent file listed in a queue of files would be transferred. 
     From the above description it should be apparent that one or more of the methods and systems described herein can provide one or more advantages in terms of enhancing the performance of mobile device(s). In at least some of these embodiments, by providing a mobile device that utilizes an accelerometer and infrared proximity sensing information, a user is able to easily actuate a mobile device to operate itself, or operate in conjunction with one or more other mobile devices, without having to inconveniently fumble with as many small buttons or actuators on the mobile device, and in a manner that in many circumstances is intuitive. Further, in at least some embodiments, additional functions of the mobile device(s) are made available to a user. 
     It is specifically intended that the present invention not be limited to the embodiments and illustrations contained herein, but include modified forms of those embodiments including portions of the embodiments and combinations of elements of different embodiments as come within the scope of the following claims.