Method for handling ciphering status in a wireless network

Details Method for handling ciphering status in a wireless network Method for handling ciphering status in a wireless network

2006-05-30

2006-05-30

Lee, Andrew C. (Department: 2663)

Multiplex communications

Pathfinding or routing

Combined circuit switching and packet switching

C370S401000, C380S255000, C713S160000

Reexamination Certificate

active

07054306

ABSTRACT:
A mobile unit maintains a first ciphering status variable for a packet switched (PS) domain and a second ciphering status variable for circuit switched (CS) domain. When a mobile unit receives a security mode command indicating that ciphering is to be activated or deactivated for transmissions in the PS domain, the first ciphering status variable is set according to the security mode command. When the UTRAN transmits a security mode command indicating that ciphering is to be activated or deactivated for transmissions in the CS domain, the second ciphering status variable is set according to the security mode command. The mobile unit ciphers or does not cipher transmissions based on the value of the ciphering status variable corresponding to the transmission domain of the radio bearer.

REFERENCES:
patent: 6460137 (2002-10-01), Akiyama et al.
patent: 6539094 (2003-03-01), Osakabe et al.
patent: 6879820 (2005-04-01), Bjelland et al.
patent: 6961588 (2005-11-01), Watanabe
patent: 6965995 (2005-11-01), Sato
3GPP TS 25.331 V3.10.0 (Mar. 2002) 3rd Generation Partnership Project; Technical Specification Group Radio Access Network; Radio Resource Control (RRC); Protocol Specification (Release 1999).
3GPP TS 25.322 V3.10.0 (Mar. 2002) 3rd Generation Partnership Project; Technical Specification Group Radio Access Network; Radio Link Control (RLC) Protocol Specification (Release 1999).

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