Method and apparatus for reestablishing crypto-sync synchronization in a communication system

A processor for reestablishing crypto-sync synchronization between a mobile station and a base station in a communication system, comprising:

• processing means for establishing an initial crypto-sync synchronization between said mobile station and said base station through a registration and acceptance order process, for receiving a message indicating detection of loss of said initial crypto-sync synchronization at said base station, for receiving a base station reject order message at said mobile station, and for transmitting a security mode request message from said mobile station to said base station, wherein said security mode request message includes a full form of crypto-sync data for said reestablishing crypto-sync synchronization between said mobile station and said base station without going through another round of said registration and acceptance order process.

A processor for reestablishing crypto-sync synchronization between a mobile station and a base station in a communication system, comprising:

• processing means for establishing an initial crypto-sync synchronization between said mobile station and said base station through a registration and acceptance process, for detecting loss of said initial crypto-sync synchronization at said base station, for generating a message indicating said detecting, for generating a base station reject order message, and for receiving a security mode request message from said mobile station, wherein said security mode request message includes a full form of crypto-sync data for said reestablishing crypto-sync synchronization between said mobile station and said base station without going through another round of said registration and acceptance process.

A mobile station for reestablishing crypto-sync synchronization with a base station in a communication system, comprising:

• a processor for establishing an initial crypto-sync synchronization between said mobile station and said base station through a registration and acceptance order process;
• a receiver for receiving a message indicating detection of loss of said initial crypto-sync synchronization at said base station, for receiving a base station reject order message from said base station;
• a transmitter for transmitting a security mode request message from said mobile station to said base station, wherein said security mode request message includes a full form of crypto-sync data for said reestablishing crypto-sync synchronization between said mobile station and said base station without going through another round of said registration and acceptance order process.

A base station for reestablishing crypto-sync synchronization with a mobile station in a communication system, comprising:

• a processor for establishing an initial crypto-sync synchronization between said mobile station and said base station through a registration and acceptance process, for detecting loss of said initial crypto-sync synchronization at said base station;
• a transmitter for transmitting a base station reject order message indicating said detecting;
• a receiver for receiving a security mode request message from said mobile station, wherein said security mode request message includes a full form of crypto-sync data for said reestablishing crypto-sync synchronization between said mobile station and said base station without going through another round of said registration and acceptance process.