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AssigneeTelefonaktiebolaget LM Ericsson (publ)
InventorsFrode Bjelland, Karl Hellwig, Frank Hundscheidt, George Vergopoulos, Jerker Widmark
Estimating the term…
A method and system for communicating information includes evaluation regarding routing of calls performed at a call control point in an ITSP and/or wireless network. A PIC identity associated with another party's preferences is acquired and sent to the call control point. The PIC identity identifies the type of the carrier network (e.g., circuit switched or VoIP) and is used to make further routing decisions. If a circuit-switched carrier is identified, the IP homing leg is terminated at the voice gateway in the recipient's HPLMN and information is sent over to the GMSC where normal, circuit-switched routing procedures. If a VoIP carrier is identified then the called user's roaming number is retrieved from the HLR, and the call is further routed directly over the IP domain towards a voice gateway at the visited network minimizing the number of transcodings. Additional transcoding steps can be avoided if a single encoding is agreed upon according to “tandem free operation” (TFO). Combining inband signaling through the telephony exchanges and out-of-band signaling in the IP network it is possible to achieve, for a mobile subscriber, one encoding and one decoding of a voice.
A method for routing a call between an originating station and a terminating station in a communication network that includes one or more packet switched legs, a first visited network associated with said terminating station and a second visited network associated with said originating station, said first and second visited networks each having a voice gateway, comprising the steps of:
A system for routing a call between an originating station and a terminating station in a communication network that includes a visited network associated with said terminating station, and one or more packet switched legs, a first visited network associated with said terminating station and a second visited network associated with said originating station, said first and second visited networks each having a voice gateway, wherein said step of negotiating said end-to-end encoding further includes:
Dependencies are inferred from the claim text.