Importance

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Abstract

Upon receipt of a request message from a core network (CN) relating to a procedure for a radio access bearer, a radio network controller node (26) of a radio access network (RAN) sends to a core network a first message (4-2) which includes, e.g., an Internet Protocol (IP) address of the radio network controller node. Subsequently the radio network controller node sends to the core network a second message (4-4) which indicates an outcome of the procedure. In one example implementation, the procedure for the radio access bearer is one of a RAB establish procedure and a RAB modify procedure. The RAB establish procedure can be initiated by an RAB Assignment Request message and is particularly useful for a RAB Assignment Request message which specifies a support mode. In this example implementation, both the first message and the second message are separate transmissions of a RAB Assignment Response message. Both transmissions of the RAB Assignment Response message preferably have a same format, but with a first transmission of the RAB Assignment Response message including, e.g., an Internet Protocol (IP) address (and, optionally, UDP port) of the radio network controller node.

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First Claim