# Patent

## Title
Communication link termination indication signal method and apparatus

## Abstract

Upon detecting at a two-way communication device that a communication link has been terminated, the two-way communication device can provide a unique corresponding signal (such as a unique audible signal) to indicate such termination. Pursuant to one approach, a plurality of such unique signals are available and a specific one of the available signals is selected for use in a given circumstance using a selection criteria of choice.

## Background
This application is a continuation of U.S. patent application Ser. No. 11/757,800, filed Jun. 4, 2007, which is a continuation-in-part of U.S. patent application Ser. No. 11/437,754, filed May 18, 2006 (now abandoned), which is a continuation-in-part of U.S. patent application Ser. No. 11/075,249, filed Mar. 8, 2005 (now U.S. Pat. No. 7,684,830, issued Mar. 23, 2012, the contents of each incorporated herein by reference.


TECHNICAL FIELD
This invention relates generally to communication link usage and more particularly to communication link status indication.
BACKGROUND
Communication devices comprise a generally well-understood area of endeavor including, but not limited to, two-way communications based upon, for example, wireless cellular telephony and the like. In many communication systems the system infrastructure will assign or otherwise facilitate the allocation of wireless resources (such as, but not limited to, radio frequency carriers, time slots, spreading codes, and so forth) to support a given communication session. The constituent elements and the totality of such allocated wireless resources can be viewed as a communication link.
There are times when confusion can arise with respect to whether a given communication link continues to persist or whether that link has, in fact, become terminated. For example, a given user may perceive, incorrectly, that a given communication link has been terminated when they conclude their conversation with another party but fail to take an appropriate action to actually effect the termination of that communication link (for example, some cellular telephones may require the user to assert an “END” button to cause the device to actively effect termination of a presently extant wireless communication link). When this occurs, the system will typically continue to monitor and track the duration of the communication link's persistence for accounting purposes. This, in turn, can lead to unexpected and undesired network usage, wasted resources, and higher-than-expected account billing for the user.
As another example, wireless communication links are subject to various operational circumstances that can lead to abrupt termination of the communication link. For example, a given user may move from one cell site to another cell site that has no currently available resources to commit to supporting a present conversation being conducted by that user. When this happens, there is typically no specific indication to the user that such a drop in services has occurred. Instead, the user may continue to engage in their part of the conversation until finally determining that they are receiving no response from the other party. Such circumstances can significantly negatively impact user experience, in part owing to the problem of determining how much information was actually conveyed to the other party in order to later continue that conversation with as little overlap or missed information content as possible.



BRIEF DESCRIPTION OF THE DRAWINGS
The above needs are at least partially met through provision of the communication link termination indication signal method and apparatus described in the following detailed description, particularly when studied in conjunction with the drawings, wherein:
FIG. 1 comprises a flow diagram as configured in accordance with various embodiments of the invention;
FIG. 2 comprises a flow diagram as configured in accordance with various embodiments of the invention; and
FIG. 3 comprises a block diagram as configured in accordance with various embodiments of the invention.



Skilled artisans will appreciate that elements in the figures are illustrated for simplicity and clarity and have not necessarily been drawn to scale. For example, the dimensions and/or relative positioning of some of the elements in the figures may be exaggerated relative to other elements to help to improve understanding of various embodiments of the present invention. Also, common but well-understood elements that are useful or necessary in a commercially feasible embodiment are often not depicted in order to facilitate a less obstructed view of these various embodiments of the present invention. It will further be appreciated that certain actions and/or steps may be described or depicted in a particular order of occurrence while those skilled in the art will understand that such specificity with respect to sequence is not actually required. It will also be understood that the terms and expressions used herein have the ordinary meaning as is accorded to such terms and expressions with respect to their corresponding respective areas of inquiry and study except where specific meanings have otherwise been set forth herein.
DETAILED DESCRIPTION
Generally speaking, pursuant to these various embodiments, upon determining that a communication link for a communication device is terminating, a unique corresponding signal is provided at the communication device to indicate termination of that communication link to a user of the communication device. In a preferred approach the corresponding signal is unique in that the signal is not used for other annunciation or notice purposes. For example, the communication device will not use this signal to also indicate the existence of an incoming call.
In a preferred approach the unique signal comprises an audible signal. In an optional but preferred approach, a plurality of candidate unique signals are available at the communication device. So configured, a user, for example, can select particular candidate unique signals to use in particular circumstances or settings to customize their user experience to their satisfaction. The unique signal itself can comprise any of a wide variety of audible or other content, including but not limited to musical content, verbal content, sound effects content, and so forth.
So configured, a user will receive a positive indication whenever a communication link being used by their communication device terminates. This, in turn, can be used to assure the user that the communication link is, in fact, operational at times when the user expects the communication link to be operational and terminated at times when the user expects termination to occur. If desired, these assurances are delivered in a customized and pleasing fashion that enhances and personalizes the user experience.
These and other benefits may become clearer upon making a thorough review and study of the following detailed description. Referring now to the drawings, and in particular to FIG. 1, a two-way communication device of choice (such as, but not limited to, cellular telephones and other two-way radios of various kinds and types, including platforms having voice and/or data modes of operation) detects 11 when a presently established communication link is terminating. This can comprise, for example, determining at the communication device itself that a wireless communication link is terminating.
Various kinds of communication links are known in the art and consequently the details regarding detecting the termination of any particular communication will necessarily differ with variations in the enabling technology as will be well understood by those skilled in the art. In many cases the communication device will become aware of such termination when an otherwise present signal (such as a pilot signal, handshake signal, or other expected and recurrent signal) becomes absent. In other cases the communication device may become aware (or confirm) such termination by itself initiating a transmission to which no expected or required response occurs.
In the absence of detecting such termination, the communication device can continue with its other usual and ordinary activities. Upon detecting such termination, however, the communication device can optionally select 12 a unique signal (for example, from amongst a plurality of candidate unique signals 13). The unique signal will comprise, in general a user-discernable signal such as a unique auditory signal, visual signal, or haptic sensation (such as a vibration pattern).
In a preferred approach the unique signal comprises an audible signal. The audio signal content itself can comprise any known or hereafter-developed audio signal content including but not limited to a monophonic series of tones, a polyphonic series of tones, and/or digitized audio (such as MP3-compatible digitized audio). Such audio signal content examples are all well understood in the art and require no further elaboration here. In a preferred approach such an audible signal can comprise any audible content that is capable of uniquely identifying a termination event as disclosed below. A non-exhaustive listing of representative examples would include: a commercial jingle; a commercial tagline; a sound sample; a sound effect sample; verbal content; and music (including both instrumental music and music featuring sung lyrics). The signal can essentially have any desired duration. In many cases, it may be preferable to have a relatively short unique signal having a duration that does not exceed some predetermined maximum duration (such as, for example, three seconds, ten seconds, three minutes, and so forth).
When a plurality of such unique signals are available to a given communication device, this selection step 12 will typically comprise selection of a particular signal from amongst the plurality of available signals. The selection criteria itself can vary with the needs and/or requirements of a given application and setting. To illustrate, one can select a particular unique signal from amongst a plurality of available unique signals as a function, at least in part, of at least one of: a specific other communication party (for example, a specific one of the available unique signals can be used when signaling the termination of a communication link that had been used to facilitate a communication with a specific third party); a time of day (for example, one unique signal might be used to indicate termination of communication links as may occur prior to noon and another, different unique signal might be used to indicate termination of communication links as may occur following noon); a random selection amongst the available unique signals; the type of communication link that has been terminated (for example, one unique signal might be used to indicate termination of a cellular communication link and another, different unique signal might be used to indicate termination of a Bluetooth communication link); a duration of the communication link prior to being terminated (for example, one unique signal might be used to indicate termination of a communication link that has been active for less than five minutes and another, different unique signal might be used to indicate termination of a communication link that has been active for more than five minutes); to name but a few.
Pursuant to these teachings, the communication unit then provides 14 a unique corresponding signal at the communication device to indicate termination of the communication link. In a preferred approach the provided unique signal will comprise the previously selected unique signal when a particular signal has been optionally selected from amongst a plurality of unique signals as described above. Various ways are known in the art to effect the provision of such unique signals as are mentioned above. Furthermore, these teachings are not particularly sensitive to the selection and/or use of any particular approach in this regard. Therefore, for the sake of brevity and the preservation of narrative focus, further detailed description of such techniques will not be provided here.
As a more specific example, these teachings can be employed to facilitate a unique audible notice as to when a wireless communication link has become terminated for whatever reason. More particularly, at least one audible signal can be provided at a two-way wireless communication device, which audible signal is uniquely used to identify termination of the wireless communication link but which is not to be used to identify other events, conditions, and/or states at this communication device. Upon then detecting at the two-way wireless communication device that a given wireless communication link has been terminated, the audible signal can be rendered audible to thereby provide a unique audible signal to a user of the two-way wireless communication device that the given wireless communication link has been terminated.
Those skilled in the art will recognize that there are various ways to provision such a two-way communication device with one or more such unique signals. Pursuant to one approach, the device can simply be loaded with one or more such signals as a factory preset. Pursuant to another approach, and referring now again to FIG. 1, one or more such unique signals can optionally be downloaded 15 to the two-way communication device. Such downloading can be facilitated in any of a wide variety of manners in accordance with well understood prior art technique, including by transmission of the corresponding data to the two-way communication device using a wireless carrier channel.
Upon downloading such a signal, it will then typically be desirable to store 16 the downloaded unique signal for future use. Such storage can be conditioned as desired. For example, a pre-established limit may be provided to prevent storage and/or use of the downloaded signal beyond a given date, time, or event. In other cases, it may be preferable to permit unconditioned use of downloaded unique signals.
Optionally, and referring now to FIG. 2, upon provisioning and/or being otherwise informed of usage of such unique signals 21 with respect to a given two-way communication device, an appropriate accounting platform for the service provider can facilitate assessing 22 a corresponding fee. For example, a specific one-time fee may be assessed for each downloaded unique signal. As another example, a fee may be assessed for each time the unique signal is used by a given two-way communication device. As yet another example, a monthly fee may be assessed for so long as a given communication device retains the stored unique signal. Other possibilities exist as well as will be well recognized by those skilled in the art.
As noted above, these teachings can be usefully employed in conjunction with a wide variety of communications platforms. In many cases, as will be well understood by those skilled in the art, modern communication devices comprise partially or even wholly programmable platforms that can be readily configured to adopt and implement the described functionality. As a more specific illustrative example, and referring now to FIG. 3, a given communication device 30 can comprise, in relevant part, a communication link termination detector 31 of choice that operably couples to, for example, a transceiver 32. So configured, the communication link termination detector 31 serves, at least in part, to monitor the operation of the transceiver 32 and in particular to detect when a communication link (such as a wireless communication link) being used by the transceiver 32 has been terminated for whatever reason.
The communication link termination detector 31, in turn, operably couples to a signal driver 33 such as, in a preferred approach, an audible signal driver. The latter serves to drive a user perceivable signal output 34 of choice and as may be appropriate to compatibly audibilize the signal content of choice. In a preferred approach, the signal driver 33 operably couples to a memory 35 having one or more audible signals stored therein. So configured, the signal driver 33 can select a particular one of a plurality of stored audible signals when the memory 35 has a corresponding plurality of such signals stored therein.
So configured, those skilled in the art will understand and appreciate that such an apparatus will readily detect the termination of a communication link and respond to such detection by providing a signal, such as an audible signal, that uniquely identifies the communication link termination event. This, in turn, permits a user of the device to be well informed with respect to the presence and/or absence of a viable communication link and can use and leverage that understanding with follow-on actions of choice to best accommodate a given condition.
There may be times, however, when a user may wish to temporarily defeat the above-described operability. For example, a given user may wish to disable this capability for some period of time while engaged in a particular activity or while visiting a particular venue. As another example, a given user may wish to effect an early conclusion of a provided signal during playback. To accommodate such a need, if desired, a user-selectable signal driver inhibit 36 can be operably coupled to the signal driver 33 to permit and facilitate such an action. Such a mechanism can assume any suitable form factor and human-machine interface of choice, including but not limited to push buttons, sliding switches, touch screen displays, a voice recognition interface, and so on.
It should now be evident and clear that these teachings permit a user to be apprised of when a communication link, such as a wireless communication link, has been terminated. This information can be used in various ways. In particular, such an indication can be used to correctly inform a user who otherwise incorrectly believes that a given communication link is available and active. Such an indication, when expected but absent, can also serve to inform a user that a given communication link remains viable and active notwithstanding a contrary user impression. Many users will appreciate that such information, important in and of itself, is also capable of being delivered in a personalized and highly customizable manner. Those skilled in the art will appreciate that these benefits are attainable with little fundamental change to many communication devices being necessary. In general, these teachings can be implemented in a highly cost effective manner.
Those skilled in the art will recognize that a wide variety of modifications, alterations, and combinations can be made with respect to the above described embodiments without departing from the spirit and scope of the invention, and that such modifications, alterations, and combinations are to be viewed as being within the ambit of the inventive concept.

## Claims

1. A cellular telephone, comprising:
a signal processing structure configured to communicate over one or more active wireless communications links for transmitting cellular telephone voice call signals and data signals different from said cellular telephone voice call signals;
memory storing an audio signal for indicating termination of an active wireless communications link;
an audio signal output device;
a transceiver; and
a communication link termination detector configured to perform operations of monitoring the transceiver and detecting the termination of the active wireless communications link;
wherein said signal processing structure is configured to cause the audio signal to be supplied to the audio signal output device in response to determining the termination of said active wireless communication link, wherein the audio signal is operable to correct a user impression that the wireless communications link is still active;
wherein detecting the termination of the active wireless communications link comprises:
detecting absence of an expected and recurring signal, the absence being unnoticed by a user;
confirming that the absence indicates the termination of the active wireless communications link, including initiating a transmission over the wireless communications link, the transmission corresponding to an expected response; and
determining the termination of the active wireless communications link upon determining that the expected response does not occur.

2. The cellular telephone according to claim 1, wherein the signal processing structure is configured to permit a user to change a factory preset of the audio signal.

3. The cellular telephone according to claim 1, wherein the audio signal is user-selectable.

4. The cellular telephone according to claim 1, wherein the audio signal comprises at least one of a monophonic series of tones, a polyphonic series of tones, and digitized audio.

5. The cellular telephone according to claim 1,
wherein the audio signal is not used in the cellular telephone for other annunciation or notice.

6. The cellular telephone according to claim 1, further comprising a user-actuable signal driver inhibit device for inhibiting supply of any second audio signal to the audio signal output device.

7. The cellular telephone according to claim 1, wherein said signal processing structure is configured to cause a first type audio signal to be supplied to the audio signal output device upon detection of a termination of an active telephone signal communication link, and a second, different type audio signal to be supplied to the audio signal output device upon detection of a termination of an active data signal communication link.

8. The cellular telephone according to claim 1, wherein the signal processing structure is configured to cause a vibration signal to be supplied to a haptic sensation output device of the cellular telephone in response to determining the termination of said active wireless communication link.

9. The cellular telephone according to claim 1, wherein detecting the termination of said active wireless communication link comprises detecting a reason of the termination.

10. A method comprising:
communicating, by a signal processing structure, over one or more active wireless communications links for transmitting cellular telephone voice call signals and data signals different from said cellular telephone voice call signals;
storing, on a cellular telephone, an audio signal for indicating an call termination of an active wireless communications link for transmitting cellular telephone voice call signals or data signals different from said cellular telephone voice call signals;
detecting, by a communication link termination detector coupled to a transceiver of the cellular telephone and monitoring the transceiver of the cellular telephone, the termination;
in response to detecting the termination, supplying, by a signal processing structure of the cellular telephone, the audio signal to an audio signal output device of the cellular telephone;
wherein the audio signal is operable to correct a user impression that the wireless communications link is still active;
wherein detecting the termination of the active wireless communications link comprises:
detecting absence of an expected and recurring signal, the absence being unnoticed by a user;
confirming that the absence indicates the termination of the active wireless communications link, including initiating a transmission over the wireless communications link, the transmission corresponding to an expected response; and
determining the termination of the active wireless communications link upon determining that the expected response does not occur.

11. The method according to claim 10, wherein the signal processing structure is used by a user to change a factory preset of the audio signal.

12. The method according to claim 11, wherein the audio signal is user-selectable.

13. The method according to claim 10, wherein the audio signal comprises at least one of a monophonic series of tones, a polyphonic series of tones, and digitized audio.

14. The method according to claim 10, wherein the audio signal is not used in the cellular telephone for other annunciation or notice.

15. The method according to claim 10, wherein the signal processing structure is configured to supply a vibration signal to a haptic sensation output device of the cellular telephone in response to determining the termination of the telephone call.