| 摘要 |
A method of initiating handover of a UE from a cell of a source enhanced Node B, eNB, to a cell of a target enhanced Node B, eNB, via the X2 interface. The method comprises, at the source eNB, maintaining a Neighbor Relation Table NRT identifying the connectivity of the source eNB to cells of its neighboring eNBs, this information including for each eNB cell an indication that the eNB cell is an open, closed or hybrid eNB cell (cell access mode) and, for each closed and hybrid eNB cell, a Closed Subscriber Group, CSG, identity. The method further comprises determining that a handover of the UE is required and using the information stored in the NRT to identify closed and optionally hybrid eNBs cells to which the subscriber has access, selecting a target eNB cell from the available open eNBs cells and the identified closed and optionally hybrid eNBs cells, and performing handover of the subscriber from the source to the target eNB cell including establishing an X2 interface between the source and the target eNBs where no such interface exists a priori. |
