Radio communication system, radio communication apparatus, and ciphering method
AssigneeNEC Corporation
InventorKeiichi Kubota
Life of this patent
Estimating the term…
Abstract
The radio communication system of the present invention includes a radio access network (10) and a radio communication apparatus (60). The radio communication apparatus (60) includes a control unit (61) that, when reconfiguring a radio access bearer between a DCH and an uplink line E-DCH and downlink line HSDPA, sets a start value that is to be used after the reconfiguration in ciphering the radio access bearer, and a transceiver (62) that transmits to the radio access network (10) the start value that was set in the control unit (61) and that is to be used after the reconfiguration.
Claims18
A radio communication system that includes a radio access network and a radio communication apparatus, the radio communication apparatus comprising:
- a control unit that, if a radio access bearer reconfigures for a circuit switching domain between DCH (Dedicated Channel) and E-DCH/HSDPA (Enhanced uplink DCH/High Speed Downlink Packet Access), and there exists no TM (Transparent Mode) radio bearer for a core network domain designated by a radio bearer setup message and at least one TM radio bearer is included in said radio bearer setup message, calculates a start value to cipher said radio access bearer after said reconfiguration;
- and
- a transmitter that transmits said start value to said radio access network.
A radio communication apparatus comprising:
- a control unit that, if a radio access bearer reconfigures for a circuit switching domain between a DCH (Dedicated Channel) and E-DCH/HSDPA (Enhanced uplink DCH/High Speed Downlink Packet Access), and there exists no TM (Transparent Mode) radio bearer for a core network domain designated by a radio bearer setup message and at least one TM radio bearer is included in said radio bearer setup message, calculates a start value to cipher said radio access bearer after said reconfiguration;
- and
- a transmitter that transmits said start value to a radio access network.
A ciphering method realized by a radio communication apparatus, said ciphering method comprising:
- calculating a start value, if a radio access bearer reconfigures for a circuit switching domain between DCH (Dedicated Channel) and E-DCH/HSDPA (Enhanced uplink DCH/High Speed Downlink Packet Access), and there exists no TM (Transparent Mode) radio bearer for a core network domain designated by a radio bearer setup message and at least one TM radio bearer is included in said radio bearer setup message, the start value being for ciphering said radio access bearer after said reconfiguration;
- and
- transmitting said start value to a radio access network.
Dependencies are inferred from the claim text.