System and method for PUCCH subband feedback signaling in a wireless network

A method for use in a mobile station operable to transmit feedback reports to a base station of a wireless network, the method including:

• transmitting to the base station a first feedback report including a precoder type indication (PTI) value;
• transmitting to the base station a second feedback report;
• and
• transmitting to the base station a third feedback report,
• wherein the PTI value indicates at least one of a period periodicity of the second feedback report and a period periodicity of the third feedback report,
• wherein, when PTI=0, a ratio H of the periodicity of the second feedback report and the periodicity of the third feedback report is signaled by a higher layer, and
• wherein, when PTI=1, the ratio H=J*K+1, where J is a number of bandwidth parts and K is a constant signaled by a base station using higher layer signaling.

For use in a wireless network, a base station comprising:

• at least one antenna;
• and
• a processing circuit operable to receive feedback reports transmitted by a mobile station,
• the feedback reports comprising a first feedback report, a second feedback report and a third feedback report,
• wherein the base station is configured to identify in the first feedback report a precoder type indication (PTI) value, and
• wherein the base station is configured to use the PTI value to determine at least one of a period periodicity of the second feedback report and a period periodicity of the third feedback report,
• wherein, when PTI=0, a ratio H of the periodicity of the second feedback report and the periodicity of the third feedback report is signaled by a higher layer, and
• wherein, when PTI=1, the ratio H=J*K+1, where J is a number of bandwidth parts and K is a constant signaled by a base station using higher layer signaling.

A method for use in a base station of a wireless network operable to receive feedback reports transmitted by a mobile station, the method comprising:

• receiving a first feedback report;
• identifying in the first feedback report a precoder type indication (PTI) value;
• determining from the PTI value at least one of a period periodicity of a second feedback report and a period periodicity of a third feedback report;
• receiving the second feedback report;
• and
• receiving the third feedback report,
• wherein, when PTI=0, a ratio H of the periodicity of the second feedback report and the periodicity of the third feedback report is signaled by a higher layer, and
• wherein, when PTI=1, the ratio H=J*K+1, where J is a number of bandwidth parts and K is a constant signaled by a base station using higher layer signaling.

A method for transmitting channel status information (CSI) in a communication system, comprising:

• reporting a precoder type indicator (PTI);
• and
• reporting a first wideband precoder matrix index (PMI), a second wideband PMT and a subband PMI in an interval following the reporting of the PTI and before a subsequent reporting of the PTI, and
• wherein reporting instances for the first wideband PMT the second wideband PMI and the subband PMI are determined based on the PTI,
• wherein, when PTI=0, the reporting instance of at least one of the first wideband PMT the second wideband PMI and the subband PMI is determined based on a value H signaled by a higher layer, and
• wherein, when PTI=1, the reporting instance of at least one of the first wideband PMI, the second wideband PMI and the subband PMI is determined based on the value H=J*K+1, where J is a number of bandwidth parts and K is a constant signaled by a base station using higher layer signaling.

A method for receiving channel status information (CSI) in a communication system, comprising:

• receiving a report including a precoder type indicator (PTI);
• and
• receiving a report including a first wideband precoder matrix index (PMI) and a second wideband PMI and a report including a subband PMI in an interval following the reporting of the PTI and before a subsequent reporting of the PTI,
• wherein reporting instances for the first wideband PMI, the second wideband PMI and the subband PMI are determined based on the PTI,
• wherein, when PTI=0, the reporting instance of at least one of the first wideband PMI, the second wideband PMI and the subband PMI is determined based on a value H signaled by a higher layer, and
• wherein, when PTI=1, the reporting instance of at least one of the first wideband PMI, the second wideband PMI and the subband PMI is determined based on the value H=J*K+1, where J is a number of bandwidth parts and K is a constant signaled by a base station using higher layer signaling.

A terminal for transmitting channel status information (CSI) in a communication system, comprising:

• a transceiver for transmitting signals to and from a base station;
• and
• a controller configured to control to report a precoder type indicator (PTI), a first wideband precoder matrix index (PMI), a second wideband PMI, and a subband PMI in an interval following the reporting of the PTI and before a subsequent reporting of the PTI,
• wherein reporting instances for the first wideband PMI, the second wideband PMI and the subband PMI are determined based on the PTI,
• wherein, when PTI=0, the reporting instance of at least one of the first wideband PMI, the second wideband PMI and the subband PMI is determined based on a value H signaled by a higher layer, and
• wherein, when PTI=1, the reporting instance of at least one of the first wideband PMI, the second wideband PMI and the subband PMI is determined based on the value H=J*K+1, where J is a number of bandwidth parts and K is a constant signaled by a base station using higher layer signaling.

A base station for receiving channel status information (CSI) in a communication system, comprising:

• a transceiver for transmitting signals to and from a terminal;
• and
• a controller configured to control to receive a report including a precoder type indicator (PTI), and receive a report including a first wideband precoder matrix index (PMI) and a second wideband PMI and a report including a subband PMI in an interval following the reporting of the PTI and before a subsequent reporting of the PTI,
• wherein reporting instances for the first wideband PMI, the second wideband PMI and the subband PMI are determined based on the PTI,
• wherein, when PTI=0, the reporting instance of at least one of the first wideband PMI, the second wideband PMI and the subband PMI is determined based on a value H signaled by a higher layer, and
• wherein, when PTI=1, the reporting instance of at least one of the first wideband PMI, the second wideband PMI and the subband PMI is determined based on the value H=J*K+1, where J is a number of bandwidth parts and K is a constant signaled by a base station using higher layer signaling.