| 摘要 |
A method, apparatus, system, and related device for data transmission, for use in implementing, when an MTC terminal device in an idle state makes a move, data transmission between the MTC terminal device and a base station. The method for data transmission comprises: when an MTC terminal in an idle state makes a move, a new base station receives an RRC connection request transmitted by the MTC terminal, where the connection request carries therein a terminal identity of the MTC terminal and data encryption-related information; the new base station acquires, on the basis of the terminal identity and the data encryption-related information, a new encryption algorithm and key corresponding to the MTC terminal, utilizes the acquired new encryption algorithm and key to encrypt downlink data transmitted to the MTC terminal, and utilizes the acquired new encryption algorithm and key to decrypt uplink data transmitted by the MTC terminal. |
