Channel state information reporting method, UE, base station and computer readable storage media

A method performed by a base station supporting a narrowband internet of things (NB-IOT) in a wireless communication system, the method comprising:

• transmitting, to a terminal, a system information block (SIB) including first information indicating a report of downlink channel quality;
• and
• receiving, from the terminal, a radio resource control (RRC) message which is a message 3 (MSG3) of a random access procedure, the RRC message including second information corresponding to a result of a downlink channel quality measurement based on the first information included in the SIB,
• wherein the second information includes two bits indicating information on a minimum NB-IOT physical downlink control channel (NPDCCH) repetition level which satisfies a predetermined block error rate (BLER),
• wherein the two bits being all 0 indicates that no information is reported for the downlink channel quality measurement, and
• wherein a value of the two bits other than all 0 indicates the result.

A terminal supporting a narrowband internet of things (NB-IoT) in a wireless communication system, the terminal comprising:

• a transceiver configured to transmit or receive a signal;
• and
• a controller coupled with the transceiver and configured to:
• receive, from a base station, a system information block (SIB) including first information indicating a report of downlink channel quality,
• generate a result of a downlink channel quality measurement performed based on the first information included in the SIB, and
• transmit, to the base station, a radio resource control (RRC) message which is a message 3 (MSG3) of a random access procedure, the RRC message including second information corresponding to the result,
• wherein the second information includes two bits indicating information on a minimum NB-IOT physical downlink control channel (NPDCCH) repetition level which satisfies a predetermined block error rate (BLER),
• wherein the two of bits being all 0 indicates that no information is reported for the downlink channel quality measurement, and
• wherein a value of the two bits other than all 0 indicates the result.

A base station supporting a narrowband internet of things (NB-IOT) in a wireless communication system, the base station comprising:

• a transceiver configured to transmit or receive a signal;
• and
• a controller coupled with the transceiver and configured to:
• transmit, to a terminal, a system information block (SIB) including first information indicating a report of downlink channel quality, and
• receive, from the terminal, a radio resource control (RRC) message which is a message 3 (MSG3) of a random access procedure, the RRC message including second information corresponding to a result of a downlink channel quality measurement based on the first information included in the SIB,
• wherein the second information includes two bits indicating information on a minimum NB-IOT physical downlink control channel (NPDCCH) repetition level which satisfies a predetermined block error rate (BLER),
• wherein the two bits being all 0 indicates that no information is reported for the downlink channel quality measurement, and
• wherein a value of the two bits other than all 0 indicates the result.