Wireless communication system, base station apparatus, user terminal, and channel state information measurement method

A user terminal in a wireless communication system comprising a plurality of base station apparatuses that transmit a reference signal for measuring a channel state, and a user terminal that connects with one of the plurality of base station apparatuses, the user terminal comprising:

• a receiving section that receives resource information about a resource to allocate the reference signal for measuring a desired signal to, and a resource for measuring an interference signal, reported from the base station apparatus;
• a measurement section that measures the desired signal and the interference signal based on the resource information;
• and
• a measurement section that measures the channel state using measurement results of the measurement section.

A channel state information measurement method in a wireless communication system comprising a plurality of base station apparatuses that transmit a reference signal for measuring a channel state, and a user terminal that connects with one of the plurality of base station apparatuses, the method comprising the steps of:

• at each base station apparatus:
• determining resource information about a resource to allocate the reference signal for measuring a desired signal to, and a resource for measuring an interference signal;
• and
• reporting the resource information to the user terminal;
• and
• at the user terminal:
• receiving the reported resource information;
• measuring the desired signal and the interference signal based on the resource information;
• and
• measuring the channel state using measurement results of the measurement section.