System and method for the solicitation of presence information from presence source

Abstract

Disclosed is a system and method for directly requesting and receiving presence information from a presence source. The system for providing a presence service, which includes a presence source which stores presence information about at least one presentity, previously registers presence information elements, which the present source can publish, in a SIP/IP (Session Initiation Protocol/Internet Protocol) core in accordance with corresponding each media feature tag value, and publishes presence information according to media feature tag values when specific presence information is requested; a SIP/IP core which allows presence information elements registered by the presence source to each media feature tag value so as to store the presence information elements, allows the media feature tag value described in the message to correspond to a previously registered media feature tab value of the presence source so as to identify a presence source to which the message for requesting the presence information will be published when the SIP/IP core receives the presence information from the presence server, and transmits the message for requesting the presence information to corresponding presence source; and a presence server, which allows a media feature tag value regarding the corresponding presence information to be included in the message for requesting presence information so as to request specific presence information from the presence source, and then transmits the message for requesting presence information, which selectively includes a publication rule regarding corresponding presence information of the corresponding source.

1 . A system for directly requesting presence information from a presence source, comprising:
 a presence source which stores presence information about at least one presentity, previously register the presence information elements, which the presence source can publish, in a SIP/IP (Session Initiation Protocol/Internet Protocol) core in accordance with each corresponding each media feature tag value, and publishes presence information according to the media feature tag value when specific presence information is requested;   the SIP/IP core for storing the presence information elements in accordance with (based on) corresponding media feature tag values registered by the presence source   a presence server transmitting a message for requesting specific presence information so as to request the specific presence information from the presence source.   
   
   
       2 . The system as claimed in  claim 2 , wherein the media feature tag value is a value showing each presence information element, which the presence source can publish, or presence information publication capability of the presence source. 
   
   
       3 . The system as claimed in  claim 1 , wherein the presence source stores pieces of presence information about one presentity and allows the information publication capability thereof to correspond to a media feature tag value so as to previously register the information publication capability in the SIP/IP core. 
   
   
       4 . The system as claimed in  claim 3 , wherein, when a request for registration of the media feature tag value is received from the presence source, the SIP/IP core stores the received request. 
   
   
       5 . The system as claimed in  claim 1 , wherein the presence server allows the media feature tag value regarding corresponding presence information to be included in the message and then transmits the message for requesting presence information. 
   
   
       6 . The system as claimed in  claim 5 , wherein the presence server allows a publication rule showing a scheme for publishing corresponding presence information by the presence source to be selectively included in the message for requesting presence information and transmits the message. 
   
   
       7 . The system as claimed in  claim 1 , wherein when the SIP/IP core receives the message for requesting presence information from the presence server, the SIP/IP core allows the media feature tag value described within the message to correspond to a previously registered media feature tag value of the presence source so as to identify a presence source to which the message for requesting presence information is published, and transmits the message for requesting presence information to the corresponding presence source. 
   
   
       8 . The system as claimed in  claim 1 , wherein when the presence source receives the message for requesting presence information, the presence source publishes corresponding information to the presence server. 
   
   
       9 . The system as claimed in  claim 8 , when the presence source receives the message for requesting presence information, which includes a publication rule, the presence source publishes corresponding presence information to the presence server according to the publication rule. 
   
   
       10 . The system as claimed in  claim 9 , wherein the publication rule can at least describe when the presence source publishes presence information about a corresponding presentity, whether the presence source publishes presence information whenever corresponding information is updated, whether the presence source immediately publishes a present state regardless of updating, or in which period the presence source publishes corresponding information, etc., or describe accuracy of presence information to be published or until when a corresponding rule is valid. 
   
   
       11 . The system as claimed in  claim 9 , wherein the publication rule can describe that all existing publication rules of the presence source are cancelled. 
   
   
       12 . The system as claimed in  claim 1 , wherein the message for requesting presence information is one among SIP REFER, SIP MESSAGE, and SIP PUBLISH. 
   
   
       13 . The system as claimed in  claim 1 , further comprising a watcher transmitting the message for requesting presence information, which includes a notification rule,
 wherein when the presence server receives specific presence information and a request for a notification rule regarding the presence information from the watcher, the presence server transmits a message for requesting presence information, which includes a publication rule allowing a corresponding source to publish corresponding presence information according to the notification rule, to the presence source, and   wherein corresponding presence information is published from the presence source to the present server according to the message for requesting presence information, and the presence server notifies the watcher of the corresponding presence information in accordance with the notification rule described in the message for requesting presence information from the watcher.   
   
   
       14 . The system as claimed in  claim 13 , wherein the notification rule can describe at least a scheme for publishing the corresponding presence information in a predetermined period or a scheme for publishing a current snapshot of the corresponding presence information. 
   
   
       15 . The system as claimed in  claim 13 , wherein the presence server allows the publication rule showing a requested publication scheme to be included in the message for requesting presence information so as to transmit the message. 
   
   
       16 . The system as claimed in  claim 15 , wherein when the presence source receives the message for requesting presence information, which includes the publication rule, the presence source publishes corresponding information to the presence server according to the publication rule. 
   
   
       17 . A method for directly requesting presence information from a present source in a system for providing a presence service, which includes a presence source storing pieces of presence information about at least one presentity, a watcher who is a user receiving the presence information, a presence server for publishing presence information to the watcher, and a SIP/IP (Session Initiation Protocol/Internet Protocol) core, which is a communication channel between the presence source, the watcher, and the presence server, the method comprising the steps of:
 previously registering, by the presence source, the presence information elements in the SIP/IP core, which the presence source can publish, in accordance with corresponding correspond to each media feature tab value;   allowing, by the presence server, the media feature tag value regarding corresponding presence information to be included in a message for requesting presence information so as to request specific presence information from the presence source, and transmitting the message for requesting presence information, which electively includes a publication rule regarding corresponding presence information of a corresponding source, and   identifying a presence source to which the message for requesting presence information will be published and transmitting the message for requesting presence information to the presence source when the SIP/IP core receives the message for requesting presence information from the presence server; and   publishing presence information according to the media feature tag value included in the message for requesting presence information when the presence source receives the message for requesting presence information.   
   
   
       18 . The method as claimed in  claim 17 , wherein the media feature tag value is a value showing each presence information element which the presence source can publish or presence information publication capability of the presence source. 
   
   
       19 . The method as claimed in  claim 17 , wherein the step of registering is a step where the presence source stores presence information about one presentity, and previously registers the presence information publication capability in the SIP/IP core in accordance with corresponding media feature tag value. 
   
   
       20 . The method as claimed in  claim 19 , where the step of registering is a step of storing a request for registration when the SIP/IP core receives the request for registration of the media feature tag value from the presence source. 
   
   
       21 . The method as claimed in  claim 17 , wherein the step where the presence server transmits the message for requesting presence information is a step where the presence server allows the media feature tag value regarding corresponding presence information to be included in the message for requesting presence information, and then transmits the message. 
   
   
       22 . The method as claimed in  claim 21 , wherein the step where the presence server transmits the message for requesting presence information is a step where the presence server allows the publication rule showing a scheme for publishing corresponding presence information to be selectively included in the message for requesting presence information and then transmits the message. 
   
   
       23 . The method as claimed in  claim 17 , wherein the step where the SIP/IP core transmits the message for requesting presence information to a corresponding presence source is a step where the SIP/IP core allows the media feature tag value described in the message to correspond to a previously registered media feature tag value of the presence source so as to identify a presence source to which the message for requesting presence information will be published, and transmits the message for requesting presence information to the corresponding presence source when the SIP/IP core receives the message for requesting presence information from the presence server. 
   
   
       24 . The method as claimed in  claim 17 , wherein the step where the presence source publishes the presence information is a step where the presence source publishes a corresponding information to the presence server when the presence source receives the message for requesting presence information. 
   
   
       25 . The method as claimed in  claim 24 , wherein the step where the presence source publishes the presence information is a step where the presence source publishes corresponding presence information to the presence server according to the publication rule when the presence source receives the message for requesting presence information including the publication rule. 
   
   
       26 . The method as claimed in  claim 25 , wherein the publication rule can describe at least one of when the presence source publishes presence information about the corresponding presentity, whether the presence source publishes presence information whenever corresponding information is updated, whether the presence source immediately publishes a present state regardless of updating, or in which period the presence source publishes corresponding information, etc., or can describe at least one of accuracy of presence information to be published or until when a corresponding rule is valid. 
   
   
       27 . The method as claimed in  claim 25 , where the publication rule can describe that all exiting publication rules of the presence source are cancelled. 
   
   
       28 . The method as claimed in  claim 17 , wherein the message for requesting presence information is one message among SIP REFER, SIP MESSAGE, and SIP PUBLISH. 
   
   
       29 . The method as claimed in  claim 17 , further comprising the steps of
 transmitting, by the watcher, the message for requesting presence information, which includes the notification rule;   transmitting, by the presence server, the message for requesting presence information, which includes the publication rule allowing a corresponding source to publish corresponding presence information according to the notification rule, to the presence source when the presence server receives the request for specific presence information and the notification rule regarding the presence information from the watcher; and   notifying the watcher of the corresponding presence information according to the notification rule described in the message for requesting presence information from the watcher when the corresponding presence information is published from the presence source to the presence server according to the message for requesting presence information.   
   
   
       30 . The method as claimed in  claim 29 , wherein the notification rule can describe at least a scheme for notifying corresponding presence information in a predetermined period or a scheme for notifying a current snapshot of corresponding presence information. 
   
   
       31 . The method as claimed in  claim 29 , wherein the presence server, transmits the message for requesting presence information to the presence source after receiving a request for specific presence information and the notification rule regarding the presence information from the watcher, and the presence server transmits the message for requesting presence information, which includes the publication rule showing a requested notification scheme 
   
   
       32 . The method as claimed in  claim 31 , further comprising the step of publishing, by the presence source, corresponding presence information to the presence server according to the publication rule when the presence source receives the message for requesting presence information, which includes the publication rule.