Method and device for displaying a text message received over a voice call

1. A method of displaying a text message, the method comprising:

receiving, by a called communication device, the text message and call correlation information over a Session Initiation Protocol (SIP) session for a voice call during call ringing of the voice call,

wherein the text message and the call correlation information are received in a SIP INFO request when a callee associated with the called communication device does not answer the voice call after a predefined number of call rings,

wherein the text message indicates a reason about the voice al; and

wherein the call correlation information is used to associate the text message with the voice call;

performing, by the called communication device, text mining of the text message received during the voice call using Natural Language Processing (NLP) techniques based on ore-defined keyword;

determining, by the called communication device, a call priority of the voice call based on text mining of the text message received from the calling communication device, during call ringing for the voice call; and

displaying, by the called communication device, the text message along with a call ringing notification of the voice call during the SIP session based on the call priority of the voice call and the call correlation information.

2. The method as claimed in claim 1 , wherein the SIP INFO request comprises a call-reason feature tag.

3. The method as claimed in claim 1 , wherein the text message is received in a Session Description Protocol (SDP) body of a SIP INFO request body.

4. The method as claimed in claim 1 further comprising storing the text message in the communication device.

5. The method as claimed in claim 1 , wherein the Call Correlation Information further comprises one of: an unique identifier of a calling communication device, an unique identifier of a called communication device, and an unique identifier for identifying a Packet Switched (PS) call transaction or the text message.

6. The method as claimed in claim 1 , wherein perform text mining of the text messages received during the incoming call using Natural Language Processing (NLP) and analytical methods based on information extraction, pattern recognition, and sentiment analysis.

7. The method as claimed in claim 1 , wherein the text message is displayed during call ringing when the call priority is determined to be high, the text message is not displayed during call ringing when the call priority is determined to be low, and the text message for an unanswered call is used to alert callee later when the call priority is determined to be medium.

8. A called communication device for displaying a text message, the called communication device comprising:

a processor; and

a memory communicatively coupled to the processor, wherein the memory stores processor-executable instructions, which, on execution, causes the processor to:

receive the text message and call correlation information over a Session Initiation Protocol (SIP) session for a voice call during call ringing of the voice call,

wherein the text message and the call correlation information are received in a SIP INFO request when a callee associated with the called communication device does not answer the voice call after a predefined number of call rings,

wherein the text message indicates a reason about the voice call; and

wherein the call correlation information comprises is used to associate the text message with the voice call;

perform text mining of the text message received during the voice call using Natural Language Processing (NLP) techniques based on pre-defined-keyword;

determine a call priority of the voice call based on text mining of the text message received from the calling communication device, during call ringing for the voice call; and

display the text message along with a call ringing notification of the voice call during the SIP session based on the call priority of the voice call and the call correlation information.

9. The called communication device as claimed in claim 8 , wherein the SIP INFO request comprises a call-reason feature tag.

10. The called communication device as claimed in claim 8 , wherein the text message is received in a Session Description Protocol (SDP) body of a SIP INFO request body.

11. The called communication device as claimed in claim 8 , further comprising storing the text message in the memory.

12. The called communication device as claimed in claim 8 , wherein the Call Correlation Information further comprises one of: an unique identifier of a calling communication device, an unique identifier of a called communication device, and or an unique identifier for identifying a Packet Switched (PS) call transaction.

13. A non-transitory computer-readable storage medium having stored thereon, a set of computer-executable instructions for causing a called communication device comprising one or more processors to perform steps comprising:

receiving a text message and call correlation information over a Session Initiation Protocol (SIP) session for a voice call during call ringing of the voice call,

wherein the text message and the call correlation information are received in a SIP INFO request when a callee associated with the called communication device does not answer the voice call after a predefined number of call rings,

wherein the text message indicates a reason about the voice call; and

wherein the call correlation information is used to associate the text message with the voice call;

performing text mining of the text message received during the voice call using Natural Language Processing (NLP) techniques based on pre-defined keyword,

determining a call priority of the voice call based on text mining of the text message received from the calling communication device, during call ringing for the voice call; and

displaying the text message along with a call ringing notification of the voice call on the called communication device during the SIP session based on the call priority of the voice call and the call correlation information.

14. The non-transitory computer-readable storage medium of claim 13 , wherein the text message is received in a Session Description Protocol (SDP) body of a SIP INFO request body.

15. The non-transitory computer-readable storage medium of claim 13 , wherein the Call Correlation Information further comprises one of: an unique identifier of a calling communication device, an unique identifier of a called communication device, and an unique identifier for identifying a Packet Switched (PS) call transaction or the text message.