Method for storing a security start value in a wireless communications system
US7233671B2 · kind B2 · utility
11Cited by
3References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 13, 2003 |
| Grant date | Jun 19, 2007 |
| Priority date | — |
| Expiry date | Feb 25, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W12/10
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A wireless device first successfully completes an Inter-RAT procedure, which is either an Inter-RAT handover, Inter-RAT cell reselection or Inter-RAT cell change order from UTRAN procedure. The wireless device then determines if a USIM is present. If the USIM is present, the wireless device determines if a new security key set was received and unused for ciphering and integrity functions during a current RRC connection. If a new key set was present and unused, the wireless device stores a value of zero into the USIM as a security START value for the CN domain associated with the RRC connection.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.