| 摘要 |
The present invention relates to a method for signalling in an infrastructure network comprising a Source Serving Node, S-SN, a Target SN, T-SN and a first Gateway. At least one Packet Data Network, PDN, bearer is established for a User Equipment, UE, when at least one PDN bearer is handed over from the S-SN to the T-TN. The network performs the steps of: - the T-SN sends (17) a modify bearer request to the first GW, said bearer request indicating that the T-SN does not support dual Internet Protocol, IP, addressing for said PDN bearer being handed over, - the first GW on the basis of the received modify bearer request (18) initiates a modify bearer procedure where a new Packet Data Network, PDN, bearer type for single IP addressing is defined, - the first GW further sends (19) a modify bearer response to the T-SN, said bearer response comprising information about the new PDN bearer type. |
