SCP guided CAMEL transaction control during MTRR

#The present invention is related to guiding a CAMEL transaction by an SCP during MTRR. (As used herein, references to the “present invention” or “invention” relate to exemplary embodiments and not necessarily to every embodiment encompassed by the appended claims.) More specifically the present invention is related to guiding a CAMEL transaction by an SCP during MTRR which controls the CAMEL transaction relinquished by a GMSC and decides whether or not to idle the CAMEL transaction during MTRR.

#This section is intended to introduce the reader to various aspects of the art that may be related to various aspects of the present invention. The following discussion is intended to provide information to facilitate a better understanding of the present invention. Accordingly, it should be understood that statements in the following discussion are to be read in this light, and not as admissions of prior art.

#Today MTRR and CAMEL interaction is handled by the 3GPP specifications by idling the CAMEL terminating transaction and restarting it. The idea of this invention is to relinquish control of the CAMEL transaction to the SCP and let the SCP decide whether to idle it or not. This proposal also rectifies the way MTRR encountering is reported to the SCP by reporting EDP-Abandon which is almost dedicated to the originator's behavior of prematurely idling the call.

#In the accompanying drawings, the preferred embodiment of the invention and preferred methods of practicing the invention are illustrated in which:

#FIG. 1 is a flow diagram regarding the present invention; and

#FIG. 2 is a block diagram of an SCP of the present invention.

#Referring now to the drawings wherein like reference numerals refer to similar or identical parts throughout the several views, and more specifically to FIG. 2 thereof, there is shown an SCP 10 of a telecommunications network having a GMSC. The SCP 10 comprises a network interface unit 12 of the SCP 10 that receives a CAMEL transaction from the GMSC. The SCP 10 comprises a processing unit 14 of the SCP 10 which controls the CAMEL transaction relinquished by the GMSC and decides whether or not to idle the CAMEL transaction during MTRR.

#The network interface unit 12 may receive an EDP-T-BUSY message and the processing unit 14 decides whether to release the transaction, terminate the transaction or continue with the transaction based on the EDP-T-BUSY message. The EDP-T-BUSY message may be in a form of a request and has an appropriate cause value indicating MTRR was encountered at the GMSC.

#The processing unit 14 may send through the network interface unit 12 a CAP defined operation called RELEASE CALL to release the transaction. The processing unit 14 may rearm the EDP message and sends through the network interface unit 12 a CONTINUE message having a suppress T-CSI indication so as not to retrigger CAMEL for the transaction and so the transaction will continue. The processing unit 14 may send through the network interface unit 12 an END message to terminate the transaction and cause the GMSC to retrigger and HLR without CAMEL suppression.