| abstract |
The present invention provides enhanced RRC re-establishment procedure on SeNB. UE with DoCu is connected to MeNB as well as SeNB. The UE implements RLM and RLF on the PCELL served by the MeNB. Once RLF is detected, the UE performs RRC connection re-establishment with the selected cell. From the perspective of eNB, SeNB triggers the pre-acquisition of UE context from MeNB to ensure successful re-establishment. From the perspective of MeNB, MeNB provides preference information to UE for selecting a suitable cell for re-establishment. From the perspective of UE, in cell selection, the UE considers its own mobility state, so when the UE has high mobility, the small cell is skipped in the reconstruction. |