Method for data transmission in a mobile telecommunications system based on Proxy Mobile IPv6

摘要

The invention relates to a method for data transmission in a mobile telecommunications system having a mobility anchor (IMA), wherein a permanent address (PPA) is allocated by the mobility anchor (IMA) for a user device (UE). When moving from a first mobile access network (AN1) connected to a first access gateway (AG1) to a second mobile access network (AN2) connected to a second access gateway (AG2), the user device (UE) obtains a local address (PLA) associated with the second mobile access network (AN2). The second access gateway (AG2) informs the mobility anchor (IMA) about the local address (PLA). The mobility anchor (IMA) associates the local address (PLA) with the permanent address (PPA) of the user device (UE). First data packets being data packets destined to the permanent address (PPA) of the user device (UE) and/or second data packets being data packets originating from the permanent address (PPA) of the user device (UE) and destined to an address of a correspondent node are modified during transmission by inserting at least one routing header in the first and/or second data packets in order to include the local address (PLA) in the first and/or second data packets and changing the address stored in the at least one routing header such that the first data packets are transmitted via the mobility anchor (IMA) to the user device (UE) and/or the second data packets are transmitted via the mobility anchor (IMA) to the correspondent node.