| 主权项 |
1. A method of detecting, at a wireless communication device, an error in a security mode configuration procedure conducted at a radio access network in wireless communication with the wireless communication device, the method comprising:
transmitting from the wireless communication device a cell update message to the radio access network, the cell update message transmitted to cause the radio access network to abort a security mode configuration procedure which is to replace an original security mode configuration with a new security mode configuration; receiving at the wireless communication device, after the transmission of said update message, the new security mode configuration and completing a security mode configuration procedure at the wireless communication device to replace the original security mode configuration with the new security mode configuration; and thereafter receiving at the wireless communication device a downlink message from the radio access network; performing a security mode configuration check on the received downlink message using said new security mode configuration; in the event that the security mode configuration check fails, performing a further security mode configuration check on the downlink message to detect an error in the security mode configuration procedure; and if the further security mode configuration check succeeds, determining there has been an error in the security mode configuration procedure and performing security mode configuration checks on further downlink messages received from the network using the original security mode configuration. |
