Radio communication system, base station apparatus and radio communication method

A radio communication system comprising a base station apparatus that is configured in compliance with an LTE-Advanced system standard, and a user terminal that is configured to be able to perform radio communication with the base station apparatus, wherein:

• the base station apparatus comprises:
• a generating section that generates cell-specific reference signal information related to a cell-specific reference signal;
• and
• a notifying section that notifies the cell-specific reference signal information to the user terminal using an RRC Connection Reconfiguration signal;
• and
• the user terminal comprises:
• a receiving section that receives the RRC Connection Reconfiguration signal;
• and
• a setting section that sets up the cell-specific reference signal information.

A radio communication system comprising a base station apparatus that is configured in compliance with an LTE-Advanced system standard, and a user terminal that is configured to be able to perform radio communication with the base station apparatus, wherein:

• the base station apparatus comprises:
• a generating section that generates sequence information related to an initial pseudo-random sequence of a downlink reference signal;
• and
• a notifying section that notifies the sequence information to the user terminal using an RRC Connection Reconfiguration signal;
• and
• the user terminal comprises:
• a receiving section that receives the RRC Connection Reconfiguration signal;
• and
• a setting section that sets up the sequence information.

A radio communication system comprising a base station apparatus that is configured in compliance with an LTE-Advanced system standard, and a user terminal that is configured to be able to perform radio communication with the base station apparatus, wherein:

• the base station apparatus comprises:
• a generating section that generates uplink reference signal information related to an uplink DM-RS (Demodulation-Reference Signal);
• a notifying section that notifies the uplink reference signal information to the user terminal using an RRC Connection Reconfiguration signal;
• and
• the user terminal comprises:
• a receiving section that receives the RRC Connection Reconfiguration signal;
• and
• a setting section that sets up the uplink reference signal information.

A radio communication system comprising a base station apparatus that is configured in compliance with an LTE-Advanced system standard, and a user terminal that is configured to be able to perform radio communication with the base station apparatus, wherein:

• the base station apparatus comprises:
• a generating section that generates radio resource information related to a radio resource for interference estimation to use in channel quality measurement in the user terminal;
• a notifying section that notifies the radio resource information to the user terminal using an RRC Connection Reconfiguration signal;
• and
• the user terminal comprises:
• a receiving section that receives the RRC Connection Reconfiguration signal;
• and
• a setting section that sets up the radio resource information.

A radio communication method in a radio communication system comprising a base station apparatus that is configured in compliance with an LTE-Advanced system standard, and a user terminal that is configured to be able to perform radio communication with the base station apparatus, the radio communication method comprising the steps of:

• at the base station apparatus:
• generating downlink control channel information related to an enhanced physical downlink control channel;
• and
• notifying the downlink control channel information to the user terminal using an RRC Connection Reconfiguration signal;
• and
• at the user terminal:
• receiving the RRC Connection Reconfiguration signal;
• and
• setting up the downlink control channel information.

A radio communication method in a radio communication system comprising a base station apparatus that is configured in compliance with an LTE-Advanced system standard, and a user terminal that is configured to be able to perform radio communication with the base station apparatus, the radio communication method comprising the steps of:

• at the base station apparatus:
• generating cell-specific reference signal information related to a cell-specific reference signal;
• and
• notifying the cell-specific reference signal information to the user terminal using an RRC Connection Reconfiguration signal;
• and
• at the user terminal:
• receiving the RRC Connection Reconfiguration signal;
• and
• setting up the cell-specific reference signal information.

A radio communication method in a radio communication system comprising a base station apparatus that is configured in compliance with an LTE-Advanced system standard, and a user terminal that is configured to be able to perform radio communication with the base station apparatus, the radio communication method comprising the steps of:

• at the base station apparatus:
• generating sequence information related to an initial pseudo-random sequence of a downlink reference signal;
• and
• notifying the sequence information to the user terminal using an RRC Connection Reconfiguration signal;
• and
• at the user terminal:
• receiving the RRC Connection Reconfiguration signal;
• and
• setting up the sequence information.

A radio communication method in a radio communication system comprising a base station apparatus that is configured in compliance with an LTE-Advanced system standard, and a user terminal that is configured to be able to perform radio communication with the base station apparatus, the radio communication method comprising the steps of:

• at the base station apparatus:
• generating uplink reference signal information related to an uplink DM-RS (Demodulation-Reference Signal);
• notifying the uplink reference signal information to the user terminal using an RRC Connection Reconfiguration signal;
• and
• at the user terminal:
• receiving the RRC Connection Reconfiguration signal;
• and
• setting up the uplink reference signal information.

A radio communication method in a radio communication system comprising a base station apparatus that is configured in compliance with an LTE-Advanced system standard, and a user terminal that is configured to be able to perform radio communication with the base station apparatus, the radio communication method comprising the steps of:

• at the base station apparatus:
• generating radio resource information related to a radio resource for interference estimation to use in channel quality measurement in the user terminal;
• notifying the radio resource information to the user terminal using an RRC Connection Reconfiguration signal;
• and
• at the user terminal:
• receiving the RRC Connection Reconfiguration signal;
• and
• setting up the radio resource information.