Abstract:
A telephony communication device is capable, upon an election by a user, of transmitting a defer answer signal in response to receiving notification of an incoming call. The defer answer signal causes the telephony infrastructure equipment to place the calling party on hold and play a voice message to the calling party requesting that the party remain on hold and preferably informing the calling party that the called party will be able to accept the call within a predetermined time. Upon the called party becoming available to accept the incoming call, the called party retrieves the waiting call by sending a connect call signal from subscriber&#39;s communication device.

Description:
BACKGROUND 
   This invention is generally directed to telecommunication systems, and is more specifically directed to providing the called party with additional options for handling an incoming call where it is not desired to answer the call immediately. 
   Telephone subscribers may receive an incoming telephone call at a time that is inconvenient to answer. For example, the subscriber may be engaged in an in-person conversation with another and does not desire to interrupt the current conversation to answer an incoming call. This situation is especially common for wireless subscribers that normally carry a cellular telephone. Assuming that the subscriber utilizes a voicemail service, the unanswered incoming call could be diverted to the subscriber&#39;s voicemail service giving the caller an opportunity to leave a message. However, this does not satisfy a need for an interactive conversation. 
   A common situation exists in which the called party does not wish to immediately answer an incoming call, but would be able to answer the incoming call within a short time, e.g. one or two minutes. Such a “deferred” answer may be preferable to both the calling and called parties. In many situations the ability to employ a defer answer may provide efficiencies. It eliminates the called party from having to retrieve a voicemail message and attempting to reach the other party by initiating a new call. From the calling party&#39;s perspective, it eliminates the uncertainty of when the called party will be available to retrieve a voicemail message and the uncertainty of possibly being unavailable to accept the return call. 
   Telecommunication systems offer wireless and wireline users the ability to subscribe to call waiting service. This service provides a subscriber engaged in a telephone conversation with another party with an alert indicating that the subscriber has another incoming call. The basic service provides an audible tone to the called party to indicate another incoming call is waiting. An advanced form of the call waiting service provides the called party with the telephone number and/or name of the call waiting party utilizing incoming call identification (CID). The called party after being alerted of the call waiting call can ignore the incoming call and continue the conversation with the other party, or can put the current party on hold and answer the incoming new call. Although the called party can return to the conversation with the other party after electing to answer the incoming new call, it is an interruption and often times an annoyance to both the other party and the called party. A defer answer capability would permit the called party to handle a call waiting caller without having to disrupt the conversation with the other party. Thus, there exists a need for a defer answer capability. 
   SUMMARY OF THE INVENTION 
   It is an object the present invention to provide a solution for this need. 
   In accordance with embodiment of the present invention, a telephony communication device is capable, upon an election by a user, of transmitting a defer answer signal in response to receiving notification of an incoming call. The defer answer signal causes the telephony infrastructure equipment to place the calling party on hold and play a voice message to the calling party requesting that the party remain on hold and preferably informing the calling party that the called party will be able to accept the call within a predetermined time. Upon the called party becoming available to accept the incoming call, the called party retrieves the waiting call by sending a connect call signal from subscriber&#39;s communication device. 
   Steps taken by the telecommunication system in handling the defer answer signal and processing the resulting related actions are also within the present invention. 

   
     BRIEF DESCRIPTION OF THE DRAWINGS 
       FIG. 1  is a diagram illustrating a telecommunications system suited for employing embodiments of the present invention. 
       FIG. 2  is a diagram of a wireless communication device incorporating an embodiment of the present invention. 
       FIG. 3  is flow diagram showing an exemplary method according to the present invention. 
       FIG. 4  is flow diagram showing an exemplary method according to the present invention when a new incoming call is presented as a call waiting alert. 
   

   DETAILED DESCRIPTION 
     FIG. 1  shows a telecommunications system that includes a wireless communication device  10 , such as a cellular telephone, with wireless communications being supported by radio access node (RAN)  12 . A mobile switching center (MSC)  14  supports RAN  12  and is connected to a voice messaging system (VMS)  16 , service circuit node (SCN)  18 , and the public switched telephone network (PSTN)  20 . Wireline telephones  22  and  24  are supported by the PSTN  20 . A consumer communication device as well as the user of the device will be referenced by the same reference numeral since it will be apparent from the context of whether the user or the device is intended. 
     FIG. 2  illustrates an exemplary wireless communication device  10  that comprises a cellular telephone. A microphone  30  and a speaker  32  are connected to an audio module  34 . A radio frequency (RF) module  36  is connected to audio module  34  and to antenna  38 . The RF module  36  is responsible for transmitting and receiving wireless signals that carry audio to and from the audio module  34 . The RF module  36  is also responsible for receiving and transmitting control signals and messages between the wireless telephone and RAN  12 . An input/output (I/O) module  40  provides an interface for signals sent to and transmitted from central processing unit (CPU)  42  and audio module  34 , RF module  36  and keypad  44 . As used herein the keypad refers to all mechanical buttons and devices associated with communication device  10  operable by the user to initiate events or functions. The CPU  42  is supported by read-only memory (ROM)  46  and random access memory (RAM)  48 . The ROM  46  contains stored program control instructions that controls the operation of the wireless device  10  in conjunction with instructions and data stored in RAM  48 . 
   The exemplary keypad  44  includes conventional touchtone dialing buttons  50 , a four-way cursor control button  52  and special purpose buttons  54 . The cursor control button may be used for various functions including controlling and selecting items shown on the display screen. The special purpose buttons each typically initiate an associated function(s) when activated by the user. The function associated with a special purpose button may be different depending upon the operational status of the wireless communication device. Common special purpose buttons include ON/OFF, Send, End, etc. In accordance with an embodiment of the present invention, a special purpose button  56  is provided that, when activated by the user, generates a defer answer (DA) signal resulting in a voice message being transmitted to a calling party advising of the option of remaining on hold for a short time before the called party can answer. 
     FIG. 3  is an exemplary flow diagram illustrating an embodiment of the present invention in which user  10 , without disrupting a current in-person conversation with another, is able to send a communication to a calling party. In step  60  wireless user  10  is in an in-person conversation with another, and user  24  places a call to user  10 . In step  62  MSC  14 , upon determining that user  10  subscribes to defer answer services, places a call to user  10 . The communication device of user  10  rings and user  10  determines not to accept an interruption (the incoming call), but that the incoming call can be accepted soon in step  64 . In step  66 , user  10  activates the defer answer function button  56  causing device  10  to transmit a DA signal to MSC  14  while the in-person conversation continues. In step  68  the MSC recognizes the DA signal causing the incoming call to be transferred to the VMS and provides instructions to the VMS for handling the call. The instructions direct the VMS to answer the call and play the recorded custom voice message of the called party to user  24  in step  70 . The voice message advises that the called party is currently unavailable but should be available to accept the call soon, and requests that the calling party remain on the line. User  24  upon hearing the voice message decides to wait and remains on hold for user  10  in step  72 . In step  74  user  10  is given periodic alerts as a reminder that the call is waiting. In step  76  user  10  concludes the call with the in-person conversation and activates a button on device  10  causing the generation of a connect call signal sent to the MSC requesting the waiting call to be connected. In step  78  the MSC sends instructions to the VMS removing the call from hold and connects the call waiting party with user  10 . The process terminates at END  80 . 
     FIG. 4  is an exemplary flow diagram illustrating an embodiment in which user  10 , without leaving a current telephone conversation with user  22 , is able to send a communication to a call waiting party. In step  100  wireless user  10  is in an established call talking with user  22 , and user  24  places a call to user  10 . In step  102  MSC  14 , upon determining that user  10  subscribes to call waiting services, provides an audible call waiting tone to user  10 . User  10  hears the call waiting alert tone and determines that the current call should not be interrupted, but that the current call will end soon and that the incoming call will be accepted immediately after termination of the current call in step  104 . In step  106 , user  10  activates the defer answer button  56  causing device  10  to transmit a DA signal to MSC  14  while the call between users  10  and  22  is maintained. In step  108  the MSC recognizes the DA signal causing the call waiting call to be transferred to the VMS and provides instructions to the VMS for handling the call. The instructions direct the VMS to answer the call waiting call and play the recorded custom voice message of the called party to user  24  in step  110 . The voice message advises that the called party is currently unavailable but should be available to accept the call soon, and requests that the calling party remain on the line. User  24  upon hearing the voice message decides to wait and remains on hold for user  10  in step  112 . In step  114  user  10  is given periodic alerts as a reminder that the call is waiting. In step  116  user  10  concludes the call with the other subscriber (the current call) and activates a button on device  10  causing the generation of a connect call signal sent to the MSC requesting the call waiting party be connected. The connect call signal can be automatically activated upon the called party activating a button on the called party&#39;s telephony device terminating the telephone call with the another party. In step  118  the MSC sends instructions to the VMS removing the call waiting party from hold and connects the call waiting party with user  10 . The process terminates at END  120 . 
   Additional details and alternatives exist with regard to the steps described with regard to  FIGS. 3 and 4 . The defer answer button  56  can be a special purpose button devoted solely to this task or could be a multipurpose function button that initiates the DA signal when activated while certain conditions exist as determined by the CPU  42 . The certain conditions could be a combination of the user currently engaged in an active call and receipt of call waiting for tones, or receipt of a new call as indicated by ringing. The DA signal may comprise an in-band or out-of-band signal transmitted from device  10  to the MSC. An out-of-band signal would be advantageous in that it would minimize, if not eliminate, an audio disruption to users  10  and  22  in the case of an existing call. The voice message played to the call waiting party could, if desired by the called party and previously arranged with the called party&#39;s service provider, provide a specific time instead of “soon”. For example, the voice message could advise the calling party that the called party is unavailable but should be available to accept the call within one minute. Also the voice message could be a custom message recorded in the voice of the called party. With regard to steps  84  and  114 , the periodic alerts may consist of a “waiting call parked” tone provided to user  10  that is preferably generated locally in device  10  under the control of CPU  42  but could also be accomplished by periodic signals and/or audio tones being generated by SCN  18  and transferred to the user by MSC  14 . Preferably the waiting call parked tone is different from an initial call waiting tone to enable the called party to distinguish the conditions associated with each tone. In steps  86  and  116  the button activated on device  10  causing the waiting call to be connected could be an activation of any button on the keypad except the END button, or could be associated with a specific button such as another activation of defer answer button  56 . 
   Further changes and modifications can be made to the described embodiment while remaining within the scope of the present invention. By way of example, and not intended as an exhaustive listing of all possible changes, exemplary alternatives are described. Visual indicia instead of audible tones could be provided by communication device  10  as alerts for the called party. The defer answer signal could be triggered by a spoken command as interpreted by speech recognition software. A plurality of special purpose buttons each associated with a defer answer signal could be utilized to provide the called party user with a choice of corresponding recorded messages to be played to the call waiting party. For example, a first DA button could trigger a voice message requesting the waiting call to hold and advising that the called party will be available within 30 seconds. A second DA button could trigger voice message requesting the waiting call to hold and advising that the called party will be available within two minutes. A third DA button could trigger a voice message advising the waiting call that the called party will not likely be available to accept the call within five minutes and explaining that the call waiting party can elect to hold and at any time elect to cease holding and leave a voicemail message by entering “*1”. With the selection of the third button, the VMS will monitor the call waiting party line for the “*1” signal indicating a transfer to the called party&#39;s voicemail. The SCN, VMS, or combination of these two in conjunction with the MSC can be utilized to implement the steps in the telecommunication infrastructure equipment. Although the illustrative embodiment is explained for a wireless subscriber as the called party, the button associated with the defer answer signal could also be implemented on a wireline telephone. The present invention is especially, but not exclusively, suited for implementation on telephones in which out-of-band signaling is available such as an ISDN telephone or an IP telephone. 
   Although embodiments of the invention have been described above and shown in the figures, the scope of the invention is defined by the claims that follow.