SCRAMBLE CODE REVISION METHOD DURING COMMUNICATION

摘要

PURPOSE:To revise a scramble code during communication regardless of a line operating state. CONSTITUTION:A base station generates a random number during communication, sends the random number and an original code designation signal 501 to a mobile station and generates a scramble code based on the random number and the original code. The mobile station generates the scramble code from the received random number and original code and sends a generation end signal 502 to the base station. The base station receiving the signal 502 sends a synchronization establish signal 503 to the mobile station in place of a communication signal. When the communication is interrupted to cause out of synchronism and the state is detected, a synchronization establish mode is set to the mobile station and re-synchronization processing is executed by a synchronization establish signal 504 sent succeedingly and when the resynchronization is established, the scramble code generated before is used to make scramble of communication between the mobile station and the base station.