Method for synchronizing a start value for security in a wireless communications network
US7254144B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 21, 2002 |
| Grant date | Aug 7, 2007 |
| Priority date | — |
| Expiry date | Jul 29, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W76/27
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A UTRAN sends a Radio Bearer Setup message to a UE, which indicates that SRNS relocation is to be performed and that a new RB is to be established in a first domain. The UE receives the Radio Bearer Setup message and assigns a first START value to a START_VALUE_TO_TRANSMIT variable according to the HFNs of all established RBs in the first domain. The UE the generates a START list containing entries corresponding all domains, including the first domain. The UE fills the entries with corresponding START values, synchronizing the entry corresponding to the first domain to hold a value that is identical to the value of the START_VALUE_TO_TRANMIT variable. The UE then composes a reply message that includes the START list, and sends the reply message to the UTRAN. The UE utilizes the START_VALUE_TO_TRANSMIT variable to set an HFN of the new RB. In a second embodiment, the response message includes both the START list and the START_VALUE_TO_TRANMIT variable. The START list is applied to all RBs but the new RB. The START_VALUE_TO_TRANMIT variable is applied to the new RB.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.