Patent ID: 7120421
Filing Date: 2006-10-10
Classification: H04L,H04W

Abstract:
1. A wireless network, comprising: a radio network controller; and a terminal, wherein the radio network controller is for transmitting a first message to the terminal, the first message at least indicating an initiation of a cipher key change, and wherein the terminal is for transmitting a second message to the radio network controller upon or subsequent to reception of the first message by the terminal, the second message being coded with a new cipher key as an acknowledgement of the cipher key change by the terminal, and wherein the radio network controller is for transmitting a third message to the terminal upon or subsequent to reception of the second message by the radio network controller, the third message at least indicating a deciphering by the radio network controller of the second message with the new cipher key or a failure by the radio network controller to decipher the second message with the new cipher key.