Importance

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Abstract

The present invention relates to a method for signalling in an infrastructure network comprising a Source Serving Node (S-SN), a Target Serving Node (T-SN), and a first Gateway. At least one Packet Data Network (PDN) bearer is established for a User Equipment when at least one PDN bearer is handed over from the S-SN to the T-TN. The network performs the steps of: sending, by the T-SN to the first GW, a modify bearer request indicating that the T-SN does not support dual Internet Protocol (IP) addressing for said PDN bearer being handed over; initiating, by the first GW on the basis of the received modify bearer request, a modify bearer procedure where a new PDN bearer type for single IF addressing is defined; and sending, by the first GW to the T-SN, a modify bearer response comprising information about the new PDN bearer type.

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First Claim