| 摘要 |
A node (110) and a method (500) therein, for authenticating a mobile device (120) over an air interface. The node (110) comprises a transmitter (630), a processor (620), and a receiver (610). The processor (620) is configured to detect the mobile device (120), to generate a nonce, to determine a key shared with the mobile device (120) and to compute a second MAC based on the generated nonce and the key, and to construct a second training sequence comprising the second MAC. The transmitter (630) is configured to transmit the generated nonce to the mobile device (120). The receiver (610) is configured to receive a first training sequence comprising a first MAC from the mobile device (120) and to tune the receiving circuits of the receiver (610), based on the first and second training sequences; and to receive a further message from the mobile device (120). Further, the processor (620) is configured to decode the further message and authenticate the mobile device (120) when the further message is decoded correctly, otherwise reject the mobile device (120). Also, a mobile device (120) and a method (700) therein is disclosed. |
