Patent ID: 7466673

Claim:
A Universal Terrestrial Radio Access Network (UTRAN) system in a Wideband Code Division Multiple Access (WCDMA) system, said UTRAN system comprising: a node which communicates with a user equipment via a point Uu; and a radio network controller which communicates with a core network via a point Iu, wherein said node and said radio network controller are connected via a point Iub, a normal or silent mode is used for a dedicated channel in an uplink side in a direction from the node to the radio network controller, and the normal mode is used for the dedicated channel in a downlink side in a direction from the radio network controller to the node, and wherein a semi-normal mode is provided in which: when a no-data frame is received from the radio network controller, the node does not transmit data to the user equipment; when data is not received from the user equipment, the node transmits the no-data frame to the radio network controller for a predetermined period of transmission timing intervals; when data is not received from the node, the radio network controller does not transmit data to the core network; and when data is not received from the core network, the radio network controller transmits the no-data frame to the node for a specified period of transmission timing intervals.