Apparatus and method for transmitting/receiving serving HS-SCCH set information in an HSDPA communication system

An apparatus for transmitting control channel set information in a communication system having a shared channel occupied by a plurality of user equipments (UEs) and spread with a plurality of channelization codes to transmit user data, and having a plurality of control channels for transmitting control information related to the shared channel in order to enable the UEs to receive the shared channel signal, the system generating a plurality of control channel sets by classifying the control channels into a predetermined number of control channels, and assigning the control channel sets so that each of the UEs monitors a particular control channel set among the control channel sets, the apparatus comprising:

• a controller for determining to modify a control channel set assigned into the UE to a new control channel set at a predetermined point of time upon detecting necessity to modify a control channel set to be assigned to a particular UE among the UEs;
• and
• a transmitter for transmitting to the UE over a downlink under the control of the controller an indicator indicating expected modification of the control channel set and information on the control channel set to be modified.

A method for receiving control channel set information in a communication system having a shared channel occupied by a plurality of user equipments (UEs) and spread with a plurality of channelization codes to transmit user data, and having a plurality of control channels for transmitting control information related to the shared channel in order to enable the UEs to receive the shared channel signal, the system generating a plurality of control channel sets by classifying the control channels into a predetermined number of control channels, and assigning the control channel sets so that each of the UEs monitors a particular control channel set among the control channel sets, the method comprising the steps of:

• receiving over a downlink an indicator indicating that currently assigned control channel set information is to be modified into a new control channel set information, and receiving over a downlink a control channel set information including the new control channel set information;
• and
• monitoring a control channel set by applying the new control channel set information at a predetermined point of time following a point of time where the control channel set information is detected.

An apparatus for receiving control channel set information in a communication system having a shared channel occupied by a plurality of user equipments (UEs) and spread with a plurality of channelization codes to transmit user data, and a plurality of control channels for transmitting control information related to the shared channel in order to enable the UEs to receive the shared channel signal, the system generating a plurality of control channel sets by classifying the control channels into a predetermined number of control channels, and assigning the control channel sets so that each of the UEs monitors a particular control channel set among the control channel sets, the apparatus comprising:

• a receiver for receiving over a downlink an indicator indicating that currently assigned control channel set information is to be modified into new control channel set information, and receiving over a downlink a control channel set information including the new control channel set information;
• and
• a controller for monitoring a control channel set by applying the new control channel set information at a predetermined point of time following a point of time where the control channel set information is detected.

A method for transmitting control channel set information in a communication system having a shared channel occupied by a plurality of user equipments (UEs) and spread with a plurality of channelization codes to transmit user data, and a plurality of control channels for transmitting control information related to the shared channel in order to enable the UEs to receive the shared channel signal, the system generating a plurality of control channel sets by classifying the control channels into a predetermined number of control channels, and assigning the control channel sets so that each of the UEs monitors a particular control channel set among the control channel sets, the method comprising the steps of:

• determining modification of a control channel set assigned to the UE into a new control channel set at a predetermined point of time;
• and
• transmitting to the UE over a particular control channel in a currently assigned control channel set an indicator indicating expected modification of the control channel set and information on the control channel set to be modified.

An apparatus for transmitting control channel set information in a communication system having a shared channel occupied by a plurality of user equipments (UEs) and spread with a plurality of channelization codes to transmit user data, and having a plurality of control channels for transmitting control information related to the shared channel in order to enable the UEs to receive the shared channel signal, the system generating a plurality of control channel sets by classifying the control channels into a predetermined number of control channels, and assigning the control channel sets so that each of the UEs monitors a particular control channel set among the control channel sets, the apparatus comprising:

• a controller for determining to modify a control channel set assigned to the UE into a new control channel set at a predetermined point of time upon detecting necessity to modify a control channel set to be assigned to a particular UE among the UEs;
• and
• a control channel transmitter for transmitting to the UE over a particular control channel in a currently assigned control channel set, after determining to modify the control channel set, an indicator indicating expected modification of the control channel set and information on the control channel set to be modified.

A method for receiving control channel set information in a communication system having a shared channel occupied by a plurality of user equipments (UEs) and spread with a plurality of channelization codes to transmit user data, and having a plurality of control channels for transmitting control information related to the shared channel in order to enable the UEs to receive the shared channel signal, the system generating a plurality of control channel sets by classifying the control channels into a predetermined number of control channels, and assigning the control channel sets so that each of the UEs monitors a particular control channel set among the control channel sets, the method comprising the steps of:

• receiving over a particular control channel in a currently assigned control channel set an indicator indicating that currently assigned control channel set information is to be modified into new control channel set information, and receiving over a particular control channel in a currently assigned control channel set control channel set information including the new control channel set information,;
• and
• monitoring a control channel set by applying the new control channel set information at a predetermined point of time following a point of time where the control channel set information is detected.

An apparatus for receiving control channel set information in a communication system having a shared channel occupied by a plurality of user equipments (UEs) and spread with a plurality of channelization codes to transmit user data, and having a plurality of control channels for transmitting control information related to the shared channel in order to enable the UEs to receive the shared channel signal, the system generating a plurality of control channel sets by classifying the control channels into a predetermined number of control channels, and assigning the control channel sets so that each of the UEs monitors a particular control channel set among the control channel sets, the apparatus comprising:

• a receiver for receiving over a particular control channel in a currently assigned control channel set an indicator indicating that currently assigned control channel set information is to be modified into new control channel set information, and receiving over a particular control channel in a currently assigned control channel set a control channel set information including the new control channel set information;
• and
• a controller for monitoring a control channel set by applying the new control channel set information at a predetermined point of time following a point of time where the control channel set information is detected.

A method for transmitting control channel set information in a communication system having a medium access control-high speed (MAC-hs) layer entity for high-speed transmission or retransmission of user data to a user equipment (UE), having a shared channel occupied by a plurality of user equipments (UEs) and spread with a plurality of channelization codes to transmit user data, and having a plurality of control channels for transmitting control information related to the shared channel in order to enable the UEs to receive the shared channel signal, the system generating a plurality of control channel sets by classifying the control channels into a predetermined number of control channels, and assigning the control channel sets so that each of the UEs monitors a particular control channel set among the control channel sets, the method comprising the steps of:

• determining modification of a control channel set assigned to the UE into a new control channel set at a predetermined point of time;
• and
• transmitting to a MAC-hs layer entity of the UE an indicator indicating expected modification of the control channel set and a MAC-hs control message including information on the control channel set to be modified.

An apparatus for transmitting control channel set information in a communication system having a medium access control-high speed (MAC-hs) layer entity for high-speed transmission or retransmission of user data to a user equipment (UE), having a shared channel occupied by a plurality of user equipments (UEs) and spread with a plurality of channelization codes to transmit user data, and having a plurality of control channels for transmitting control information related to the shared channel in order to enable the UEs to receive the shared channel signal, the system generating a plurality of control channel sets by classifying the control channels into a predetermined number of control channels, and assigning the control channel sets so that each of the UEs monitors a particular control channel set among the control channel sets, the apparatus comprising:

• a controller for determining to modify a control channel set assigned to the UE into a new control channel set at a predetermined point of time upon detecting necessity to modify a control channel set to be assigned to a particular UE among the UEs;
• and
• a transmitter for transmitting to a MAC-hs layer entity of the UE, under the control of the controller an indicator indicating expected modification of the control channel set and a MAC-hs control message including information on the control channel set to be modified.

A method for transmitting status information of a first buffer and a second buffer in a communication system in which a Node B assigns a sequence number to user data in transmission order and includes the first buffer for storing the transmitted user data in transmission order and the second buffer for storing data to be retransmitted out of the transmitted user data, and a user equipment (UE) includes a third buffer for storing user data received from the Node B according to a sequence number of the received user data, the method comprising the steps of:

• (a) transmitting by the Node B the status information of a sequence number of user data to be transmitted from the first buffer and a sequence number of user data to be transmitted from the second buffer, for a transmission time interval (TTI) following a current point of time;
• and
• (b) receiving by the UE the status information and comparing a sequence number of user data to be transmitted from the first buffer with a sequence number of user data stored in the third buffer, and processing the user data stored in the third buffer according to the comparison result.

An apparatus for transmitting status information of a first buffer and a second buffer in a communication system in which a Node B assigns a sequence number to user data in transmission order and includes the first buffer for storing the transmitted user data in transmission order and the second buffer for storing data to be retransmitted out of the transmitted user data, and a user equipment (UE) includes a third buffer for storing user data received from the Node B according to a sequence number of the received user data, the apparatus comprising:

• a Node B transmitter for transmitting the status information of a sequence number of user data to be transmitted from the first buffer and a sequence number of user data to be transmitted from the second buffer, for a transmission time interval (TTI) following a current point of time;
• and
• a UE receiver for receiving the status information and comparing a sequence number of user data to be transmitted from the first buffer with a sequence number of user data stored in the third buffer, and processing the user data stored in the third buffer according to the comparison result.