Patent ID: 8792891

Claim:
A method for identifying a terminal, comprising: receiving, by a source eNB, an RRC reestablishment message from a terminal to which an RLF occurs, wherein the RRC reestablishment message comprises: a C-RNTI allocated for the terminal in a cell where the RLF occurs, a PCI of the cell where the RLF occurs, and a shortMAC-I; determining according to the PCI of the cell where the RLF occurs, by the source eNB, all target eNBs where the terminal is supposed to locate; sending, by the source eNB, RLF information to the all target eNBs, wherein the RLF information comprises: the PCI of the cell where the RLF occurs, the C-RNTI allocated for the terminal in the cell where the RLF occurs, the shortMAC-I, and an ECGI of a cell to which the RRC reestablishment is attempted; receiving, by one of the all target eNBs, the RLF information; determining according to the received PCI, by the one of the all target eNBs, one or more cells where the terminal is supposed to locate, wherein the one or more cells is under the coverage of the one of the all target eNBs; determining, by the one of the all target eNBs, whether the received C-RNTI is possessed of by one of the one or more cells where the terminal is supposed to locate; in the case it is determined the received C-RNTI is possessed of by one of the one or more cells where the terminal is supposed to locate, determining, by the one of the all target eNBs, a key and an integrity protection algorithm according to the received C-RNTI; inputting, by the one of the all target eNBs, the received PCI, C-RNTI and ECGI into the integrity protection algorithm, as well as using the key, to calculate a shortMAC-I; determining, by the one of the all target eNBs, whether the calculated shortMAC-I is identical to the received shortMAC-I; in the case the calculated shortMAC-I is identical to the received shortMAC-I, determining, by the one of the all target eNBs, that the terminal locates in the one of the one or more cells; otherwise, determining that the terminal does not locate in the one of the one or more cells.