Method and apparatus for channel measurement

A method for channel measurement, comprising:

• obtaining a size of measured bandwidth and a location of the measured bandwidth in system bandwidth, wherein the size and the location are sent by a base station;
• obtaining at least one of
• a size of a measured sub-band, and
• a quantity or sizes of measured sub-band sets;
• receiving reference signals transmitted by the base station within a range of the measured bandwidth, the reference signals being Channel State Information Reference Signals (CSI-RS);
• measuring at least one of:
• the measured bandwidth of the obtained size and location according to the obtained size and location of the measured bandwidth in the system bandwidth according to the received reference signals,
• the measured sub-band of the obtained size at the measured bandwidth of the obtained size and location according to the obtained size and location of the measured bandwidth in the system bandwidth, and the obtained size of the measured sub-band, according to the received reference signals;
• and
• measured sub-bands of a corresponding size in the measured sub-band sets of the obtained quantity or sizes at the measured bandwidth of the obtained size and location according to the obtained size and location of the measured bandwidth in the system bandwidth, and the obtained size of the measured sub-band and the obtained quantity or sizes of the measured sub-band sets, according to the received reference signals;
• and
• returning measurement results to the base station.

An apparatus for channel measurement, comprising:

• a bandwidth information determining module, configured to determine a size of measured bandwidth of a terminal and a location of the measured bandwidth in system bandwidth;
• a sub-band information determining module, configured to determine at least one of
• a size of a measured sub-band, and
• a quantity or sizes of measured sub-band sets according to the measured bandwidth;
• a sending module, configured to send, to the terminal, at least one of
• the determined size and location of the measured bandwidth in the system bandwidth that are determined by the bandwidth information determining module,
• the determined size of the measured sub-band that is determined by the sub-band information determining module, and
• the determined quantity or sizes of the measured sub-band sets that are determined by the sub-band information determining module;
• and
• a transmitting module, configured to transmit, to the terminal, reference signals within a range of the measured bandwidth, the reference signals being Channel State Information Reference Signals (CSI-RS);
• a receiving module, configured to receive measurement results returned by the terminal, wherein the measurement results are obtained
• after the terminal measures the measured bandwidth of the determined size and location in the system bandwidth, according to the reference signals transmitted to the terminal,
• after the terminal measures the measured sub-band of the determined size at the measured bandwidth of the determined size and location in the system bandwidth, according to the reference signals transmitted to the terminal, or
• after the terminal measures measured sub-bands of a corresponding size in the measured sub-band sets of the determined quantity or sizes at the measured bandwidth of the determined size and location in the system bandwidth, according to the reference signals transmitted to the terminal.