Method for sending a message to a calling phone when called phone aborts an incoming call request

The present invention provides a method for sending a message to a calling phone when a called phone aborts an incoming call request. A mobile unit receives a call request from a calling phone. The communication network determines that the mobile unit has aborted the call request during ringing. For example, the mobile unit may abort the call request by pressing a predetermined key, such as the <END> key, on the mobile unit. The communication network alerts the calling phone that the mobile unit aborted the call request during ringing. The network can play a message to the calling phone that the mobile unit has aborted the call request during ringing, and the message can include additional information, such as the expected length of time that the mobile unit will be unavailable or other predetermined messages.

FIELD OF THE INVENTION

The present invention relates generally to wireless communication systems, and more particularly to a call request for a mobile unit in a wireless communication network.

BACKGROUND OF THE INVENTION

Mobile service providers want to increase the maximum number of Busy Hour Call Attempts (BHCA) in order to efficiently serve the increasing number of mobile subscribers to the mobile service provider.

Calls placed to a mobile unit require call setup procedures. These call setup procedures reserve resources from the wireless communication network. In the case when a call does not get completed, the resources have to be released. During the time that they are reserved, they are unavailable for other users.

One situation that unnecessarily consumes network resources is a call request placed to a mobile subscriber that does not want to answer the call. The network resources are reserved until the call request is dropped. This situation therefore consumes network resources in a situation where a call is not going to be completed.

Therefore, a need exists for a method for increasing the number of calls that can be processed in wireless communication systems.

BRIEF SUMMARY OF THE INVENTION

The present invention provides a method for sending a message to a calling phone when a called phone aborts an incoming call request during ringing. A wireless communication network receives a call request for a mobile unit. The wireless communication network rings the mobile unit. The ringing of the mobile unit requires the reservation of wireless system resources by the MSC.

In accordance with an exemplary embodiment of the present invention, the mobile unit can end ringing and send a message to the calling phone. This enhances communication between the called mobile unit and the calling phone while conserving valuable system resources.

The wireless communication network determines if the mobile unit has aborted the call request during ringing, such as by pressing the <END> key on the mobile unit. A user of the mobile unit may also press additional keys prior to the <END> key, and these additional keystrokes can be utilized to send additional information to the calling phone. If the mobile unit does not abort the call during ringing, typical call processing occurs.

If the mobile unit aborts the call during ringing, the wireless communication network alerts the calling phone that the mobile unit has aborted the call request during ringing, such as by playing a message to the calling phone.

The MSC preferably receives the key sequence that the mobile unit pressed to abort the call request during ringing. The user of the called mobile unit may press, for example, the <END> key during ringing. In this scenario, the called mobile unit sends a message to an associated base station that the <END> key has been pressed. The base station alerts the MSC, which knows that from the key pressed that the called mobile unit has aborted the call request during ringing. The MSC then alerts the calling party that the called mobile unit has denied the call request. The user can, in conjunction with the service provider, define alternate methods of alerting the MSC that the call request is being aborted during ringing, such as key sequences defined by the user.

A user of the called mobile unit can also press the <END> key subsequent to a numerical sequence representing the number of minutes that the user expects the current call to last. In this embodiment, the MSC sends a message to the calling phone that the called mobile unit aborted the call ringing and will not be available for the number of minutes that the user entered into the mobile unit keypad. In accordance with one embodiment of the present invention, the MSC prevents the called party from completing a call request to the called mobile unit until the time period entered by the user of the called mobile unit has expired. Further, the MSC can block any callers from completing a call request during this time period.

In a further exemplary embodiment, the user of the called mobile unit can press a predetermined key sequence during ringing that alerts the MSC that the called mobile unit does not want to answer this call. Further, the predetermined key sequence can also convey additional information to the MSC and the calling phone. The predetermined key sequence can be a default set established by the service provider, or can be programmed by the user. The user can also send a message that the user is busy and will return the call as soon as possible.

The MSC then releases the call and all of the system resources that were reserved during the call request. The present invention therefore benefits wireless service providers by allowing the inclusion of enhanced features and the increase in revenue generation and resource utilization. In addition, the present invention provides for enhanced communication between a called party and a calling party without requiring additional bandwidth, but rather by utilizing less bandwidth. By providing additional information to a calling party during a call reject, the present invention conserves system resources by lowering the chance of a subsequent unsuccessful callback from the calling party.

DETAILED DESCRIPTION OF THE INVENTION

FIG. 1depicts a communication system100in accordance with an exemplary embodiment of the present invention. Communication system100includes a wireline communication network101and a wireless communication network103. Communication system100may include a plurality of wireless networks, but only wireless communication network103is depicted inFIG. 1for clarity.

Wireline communication network101is a wireline network that allows wireline devices to access a telephone network, such as the Public Switched Telephone Network (PSTN). Customer Premises Equipment (CPE)102is a telephone unit that allows communication with other users via wireline communication network101.

Wireless communication network103includes at least one Mobile Switching Center (MSC)108, a base station107, and an announcements database109. Each MSC is connected to a plurality of base stations, although only a single base station107is depicted inFIG. 1for clarity. MSC108processes call and service requests initiated by and intended for mobile units105and106and allocates the required transmission and signaling resources.

Wireless communication network103can utilize any wireless protocol, including but not limited to analog, such as AMPS, TACS and NMT, or digital, such as GSM, TDMA, CDMA, GPRS, EDGE, IS-95, IS-95B, HDR, WCDMA, and CDMA2000.

Base station107communicates with wireless communication network103via MSC108and communicates over-the-air with mobile units105and106. Although only one base station and two mobile units are depicted inFIG. 1for clarity, it should be understood that wireless communication network103typically includes a plurality of MSCs, each of which communicates with a plurality of base stations, and each base station services a plurality of wireless units. Base Station107is a wireless station that preferably includes connections to the controlling servers via IP (Internet Protocol) or traditional switching mechanisms.

In an exemplary embodiment, mobile units105and106are wireless phones. In a further exemplary embodiment, mobile units105and106can be Personal Digital Assistants (PDAs), wireless email terminals, or any other communications device that is capable of communicating with wireless communication network103.

Announcements database109includes messages that can be sent to a calling phone. Messages in announcements database109can be default messages provided by a service provider or messages prerecorded by a user of called mobile unit105.

FIG. 2depicts a flowchart200of a method for sending a message to a calling phone when a called phone aborts an incoming call request during ringing in accordance with an exemplary embodiment of the present invention.

In accordance with an exemplary embodiment of the present invention, wireless communication network103receives (201) a call request for mobile unit105. The call request may come from a wireline phone, such as wireline phone102, or from a mobile unit, such as mobile unit106.

Wireless communication network103rings (203) mobile unit105. The ringing of mobile unit105requires the reservation of wireless system resources by MSC108. In a typical scenario, MSC108assigns base station107to communicate over-the-air with mobile unit105. MSC108sends a paging request message to base station107, which pages mobile unit105. When mobile station105responds to the paging message, base station107assigns a channel for the call request and alerts mobile unit105to the call request.

At this point, in prior art wireless communication networks, the call request may be answered or ignored by mobile unit105. In accordance with an exemplary embodiment of the present invention, mobile unit105can end ringing of mobile unit105and send a message to the calling phone. This enhances communication between the called mobile unit and the calling phone while conserving valuable system resources.

Wireless communication network103determines (205) if mobile unit105has aborted the call request during ringing. In an exemplary embodiment of the present invention, mobile unit105aborts the call request by pressing the <END> key on mobile unit105. A user of mobile unit105may also press additional keys prior to the <END> key, and these additional keystrokes can be utilized to send additional information to the calling phone. Base station107receives the key sequence from mobile unit105and passes it to MSC108. If mobile unit105does not abort the call during ringing, typical call processing occurs and the process ends (299).

If mobile unit105does abort the call during ringing as determined at step205, wireless communication network103alerts (207) the calling phone that the mobile unit105has aborted the call request during ringing. The MSC preferably alerts the calling phone that the called mobile unit aborted the call request during ringing by playing a message to the calling phone.

In an exemplary embodiment, MSC108receives the key sequence that mobile unit105pressed to abort the call request during ringing. In an exemplary embodiment of the present invention, the user of the called mobile unit presses the <END> key during ringing. The called mobile unit will send a message to the base station that the <END> key has been pressed. The base station alerts the MSC, which knows that from the key pressed that the called mobile unit has aborted the call request during ringing. The MSC then preferably alerts the calling party that the called mobile unit has denied the call request. The user can, in conjunction with the service provider, define alternate methods of alerting the MSC that the call request is being aborted during ringing, such as key sequences defined by the user.

In a further exemplary embodiment, a user of the called mobile unit presses a numerical sequence representing the number of minutes that the user expects the current call to last, followed by the <END> key. In this embodiment, MSC108sends a message to the calling phone that will be played at the calling phone and will alert the calling phone that the called mobile unit aborted the call ringing and will not be available for the number of minutes that the user entered into the mobile unit keypad. In accordance with one embodiment of the present invention, the MSC prevents the called party from completing a call request to the called mobile unit until the time period entered by the user of the called mobile unit has expired. Further, the MSC can block any callers from completing a call request during this time period.

In a further exemplary embodiment, the user of the called mobile unit presses a predetermined key sequence during ringing. The predetermined key sequence alerts the MSC that the called mobile unit does not want to answer this call, but can also convey additional information to the MSC and the calling phone. The predetermined key sequence can be a default set established by the service provider, or can be programmed by the user. The predetermined messages are preferably stored in announcements database109.

As an example of predetermined key sequences, the user could press “1” <END>, which indicates to the MSC that the user wants a message of “The user is currently busy, and requests that you not call back and remove the user from your call list.” Further, a message could tell the calling party that the user is busy and will return the call as soon as possible.

The MSC releases the call and all of the system resources that were reserved in order to place the call request.

While this invention has been described in terms of certain examples thereof, it is not intended that it be limited to the above description, but rather only to the extent set forth in the claims that follow.