Channel measurement and feedback method, network device, and system

A first network device, wherein the first network device comprises:

• a receiving module, configured to receive a pilot port configuration information sent by a second network device, wherein the pilot port configuration information describes an at least two pilot ports;
• a determining module, configured to:
• measure, by using the at least two pilot ports, a pilot signal sent by the second network device, and
• determine a first information,
• wherein the first information comprises a second information of the first network device when it is assumed that the first network device and a third network device communicate with the second network device by performing spatial multiplexing on a same time-frequency resource, and
• wherein the second information comprises at least one of:
• an information about a pilot port used by the first network device,
• a rank indication (RI) used by the first network device,
• a precoding matrix indicator (PMI) used by the first network device, or
• a channel quality indicator (CQI);
• and
• a sending module, configured to feed back the first information to the second network device.

A channel measurement and feedback system, wherein the system comprises:

• a first network device, a second network device, and a third network device,
• wherein the first network device comprises:
• a receiving module, configured to receive a pilot port configuration information sent by a second network device, wherein the pilot port configuration information describes an at least two pilot ports;
• a determining module, configured to:
• measure, by using the at least two pilot ports, a pilot signal sent by the second network device, and
• determine a first information,
• wherein the first information comprises a second information of the first network device when it is assumed that the first network device and a third network device communicate with the second network device by performing spatial multiplexing on a same time-frequency resource, and
• wherein the second information comprises at least one of:
• an information about a pilot port used by the first network device,
• a rank indication (RI) used by the first network device,
• a precoding matrix indicator (PMI) used by the first network device, or
• a channel quality indicator (CQI);
• and
• a sending module, configured to feed back the first information to the second network device.