Apparatus and method for determining uplink ciphering activation time in universal mobile telecommunications system user equipment
AssigneeM-Stack Limited
InventorsNicola M. Funnell, Andrew Farnsworth, Robert J. Harrison
Life of this patent
Estimating the term…
Abstract
The details of an apparatus and method for determining uplink ciphering activation time in universal mobile telecommunications system user equipment are disclosed herein. The ciphering activation time is determined for radio bearers other than RB2 by measuring the data rate on each target radio bearer during the time that it takes for a polling or RRC message sent from the user equipment UE to be acknowledged by the network UTRAN. For RB2, the uplink ciphering activation time is determined by taking into account the size of the RRC response message and the data already queued on RB2 for transmission.
Claims23
A method of determining uplink ciphering activation time in a user equipment (UE), the UE configurable for communication with a telecommunications network over a communications channel comprising a radio bearer, the uplink ciphering activation time for determining a time at which a new ciphering configuration is to be implemented between the user equipment and the network, the method comprising the steps of:
- determining the uplink activation time to be greater than a time to receive a response message at the network to a ciphering change request message while minimising delay in the change to the new ciphering configuration.
User equipment (UE) for determining an uplink ciphering activation time (UCAT) applicable to a communications channel on the UE, the communications channel compliant with a UMTS Terrestrial Radio Access Network (UTRAN), the UCAT usable to determine a time at which a new ciphering configuration for an uplink is to be implemented, the UE comprising:
- a processor configured to generate a response message after receiving a ciphering change request message, the response message configurable for sending on a radio bearer, the response message configured to include the UCAT, the processor for calculating the UCAT to be greater than a time to receive the response message at the network while minimising delay in the change to the new ciphering configuration.
A computer program product comprising a non-transitory computer readable storage medium, the computer program product comprising:
- computer readable program code embodied at the non-transitory computer readable storage medium for configuring a response message after receiving a ciphering change request message, the configured response message to be usable for sending on a radio bearer and to be receivable by a UMTS Terrestrial Radio Access Network (UTRAN) compliant communications network;
- computer readable program code embodied at the non-transitory computer readable storage medium for determining an uplink ciphering activation time to be greater than a time to receive a response message at the network to a ciphering change request message while minimising delay in the change to the new ciphering configuration.
Dependencies are inferred from the claim text.