Method for delivering message based on CPM service and server thereof

1. A method for delivering a message, the method performed by a converged IP messaging (CPM) server and comprising:

determining, by the CPM server, whether to defer a message from a source terminal to a recipient based on a user preference;

determining, by the CPM server, whether to store the message in a message storage server based on the user preference if the message is determined not to be deferred, but to be delivered;

requesting, by the CPM server, the message storage server to store the message if the message is determined to be stored;

receiving, by the CPM server, a response from the message storage server after the message is stored in the message storage server, wherein the response includes information regarding the stored message,

wherein the information includes a unique identifier (UID) regarding the message;

checking, by the CPM server, whether there is a registered target terminal of the recipient that is able to receive the message from the source terminal based on a user preference;

extracting, by the CPM server, the information from the response; and

transmitting, by the CPM server, the message received from the source terminal, into which the information is added, to the registered target terminal,

wherein the message having the same UID in the message storage server is not transmitted repeatedly to the registered target terminal when synchronizing messages in the registered target terminal with the message storage server.

2. The method of claim 1 , further comprising:

determining whether to interwork the message, or whether to redirect the message to a different terminal according to the user preference.

3. The method of claim 1 , further comprising:

determining whether to reject the message based on the information in the message from the source terminal.

4. The method of claim 1 , wherein the information allows for discrimination of the message in the message storage server.

5. The method of claim 1 , wherein the CPM server is located within a home network of the target terminal.

6. The method of claim 1 , further comprising:

checking, by the CPM server, whether or not the message from the source terminal is in a large-sized CPM message mode.

7. The method of claim 1 , further comprising:

receiving a response from the target terminal; and

transmitting the response from the target terminal to the CPM server located in the home network of the source terminal.

8. The method of claim 7 , wherein when there are a plurality of target terminals and a first response among responses from the plurality of target terminals, is received, the first response is transmitted to the CPM server located in the home network of the source terminal.

9. A method for delivering a message, the method performed by a converged IP messaging (CPM) server and comprising:

determining, by the CPM server, whether to deliver a message from a source terminal to a recipient in an interworking manner or to redirect the message to a different terminal of the recipient based on a user preference;

determining, by the CPM server, whether to store the message in a message storage server based on the user preference if the message is determined not to be deferred, but to be interworked or redirected;

requesting, by the CPM server, the message storage server to store the message if the message is determined to be stored;

receiving, by the CPM server, a response from the message storage server after the message is stored in the message storage server, wherein the response includes information regarding the stored message,

wherein the information includes a unique identifier (UID) regarding the message;

checking, by the CPM server, whether there is a registered target terminal of the recipient that is able to receive the message from the source terminal based on the user preference;

extracting, by the CPM server, the information from the response; and

transmitting the message received from the source terminal, in which the information is added, to the registered target terminal in an interworking manner or redirecting the same to the different terminal,

wherein the message having the same UID in the message storage server is not transmitted repeatedly to the registered target terminal when synchronizing messages in the registered target terminal with the message storage server.

10. The method of claim 9 , wherein the information allows for discrimination of the message in the message storage server.

11. The method of claim 9 , wherein the CPM server is located within a home network of the target terminal.

12. A converged IP messaging (CPM) server, comprising:

a processor configured to determine whether to deliver a message from a source terminal to a recipient based on the user preference, and determine whether to store the message in a message storage server if the message is determined not to be deferred, but to be delivered; and

a transceiver configured to request the message storage server to store the message if the message is determined to be stored, and receive a response regarding the stored message after the message is stored in the message storage server, the response including information regarding the stored message,

wherein the information includes a unique identifier (UID) regarding the message,

wherein the processor is further configured to check whether there is a registered target terminal of the recipient that is able to receive the message from the source terminal based on the user preference,

wherein the processor is further configured to extract the information from the response,

wherein the transceiver is further configured to transmit the message received from the source terminal, in which the information is added, to the registered target terminal, and

wherein the message having the same UID in the message storage server is not transmitted repeatedly to the registered target terminal when synchronizing messages in the registered target terminal with the message storage server.

13. The server of claim 12 , wherein the information allows for discrimination of the message in the message storage server.