Procedures, user equipment and base stations for code block group-based transmission
A user equipment (UE) is described. The UE includes receiving circuitry configured to receive a radio resource control message including first information used for configuring a number of more than one code block groups (CBGs) in a transport block (TB). The receiving circuitry is also configured to receive the more than one CBGs, the more than one CBGs comprising first CBGs and second CBGs. The UE also includes processing circuitry configured to determine a number of code blocks (CBs) from the TB. A first number, a second number, a third number, and a fourth number are given based on the number of more than one CBGs and the number of CBs. The first number is a number of the first CBG(s). The second number is a number of CB(s) comprised of each of the first CBG(s). The third number is a number of the second CBG(s). The fourth number is a number of CB(s) comprised of each of the second CBG(s).
1. A user equipment, comprising:
receiving circuitry configured to receive a radio resource control message comprising first information used for configuring a number of more than one code block groups (CBGs) in a transport block (TB),
the receiving circuitry being configured to receive an initial transmission of a physical downlink shared channel (PDSCH) that includes the more than one CBGs, the more than one CBGs comprising first CBG(s) and second CBG(s), the initial transmission of the PDSCH being scheduled by using a new data indicator field in a downlink control information format;
processing circuitry configured to determine a number of code blocks (CBs) in the TB, wherein
a first number, a second number, a third number, and a fourth number are given based on the number of more than one CBGs and the number of CBs,
the first number is a number of the first CBG(s),
the second number is a number of CB(s) comprised of each of the first CBG(s),
the third number is a number of the second CBG(s), and
the fourth number is a number of CB(s) comprised of each of the second CBG(s),
wherein, the second number and the fourth number are given by different calculation methods, and
the first CBG(s) and the second CBG(s) are included in a single TB received by the user equipment in the initial transmission of the PDSCH; and
transmitting circuitry configured to transmit respective hybrid automatic repeat request-ACK (HARQ-ACK) bits for the more than one CBGs,
the receiving circuitry being configured to receive a retransmission of the PDSCH that includes a subset of the more than one CBGs, the retransmission of the PDSCH being scheduled by using a CBG transmission information (CBGTI) field and a CBG flushing out information (CBGFI) field in the downlink control information format, wherein
the CBGTI field indicates the subset of the more than one CBGs to be retransmitted and the CBGFI field directly indicates whether soft combining is applied to the subset of the more than one CBGs or not,
the processing circuitry being configured to decode the subset of the more than one CBGs according to the CBGTI field and the CBGFI field.
2. A base station apparatus comprising:
transmitting circuitry configured to transmit a radio resource control message comprising first information used for configuring a number of more than one code block groups (CBGs) in a transport block (TB),
the transmitting circuitry being configured to transmit an initial transmission of a physical downlink shared channel (PDSCH) that includes the more than one CBGs, the more than one CBGs comprising first CBG(s) and second CBG(s), the initial transmission of the PDSCH being scheduled by using a new data indicator field in a downlink control information format;
processing circuitry configured to determine a number of code blocks (CBs) in the TB, wherein
a first number, a second number, a third number, and a fourth number are given based on the number of more than one CBGs and the number of CBs,
the first number is a number of the first CBG(s),
the second number is a number of CB(s) comprised of each of the first CBG(s),
the third number is a number of the second CBG(s), and
the fourth number is a number of CB(s) comprised of each of the second CBG(s),
wherein, the second number and the fourth number are given by different calculation methods, and
the first CBG(s) and the second CBG(s) are included in a single TB received by a user equipment in the initial transmission of the PDSCH; and
receiving circuitry configured to receive respective hybrid automatic repeat request-ACK (HARQ-ACK) bits for the more than one CBGs,
the transmitting circuitry being configured to transmit a retransmission of the PDSCH that includes a subset of the more than one CBGs, the retransmission of the PDSCH being scheduled by using a CBG transmission information (CBGTI) field and a CBG flushing out information (CBGFI) field in the downlink control information format, wherein
the CBGTI field indicates the subset of the more than one CBGs to be retransmitted and the CBGFI field directly indicates whether soft combining is applied to the subset of the more than one CBGs or not.
3. A communication method of a user equipment comprising:
receiving a radio resource control message comprising first information used for configuring a number of more than one code block groups (CBGs) in a transport block (TB),
receiving an initial transmission of a physical downlink shared channel (PDSCH) that includes the more than one CBGs, the more than one CBGs comprising first CBG(s) and second CBG(s), the initial transmission of the PDSCH being scheduled by using a new data indicator field in a downlink control information format;
determining a number of code blocks (CB s) in the TB, wherein
a first number, a second number, a third number, and a fourth number are given based on the number of more than one CBGs and the number of CBs,
the first number is a number of the first CBG(s),
the second number is a number of CB(s) comprised of each of the first CBG(s),
the third number is a number of the second CBG(s), and
the fourth number is a number of CB(s) comprised of each of the second CBG(s),
wherein, the second number and the fourth number are given by different calculation methods, and
the first CBG(s) and the second CBG(s) are included in a single TB received by the user equipment in the initial transmission of the PDSCH;
transmitting respective hybrid automatic repeat request-ACK (HARQ-ACK) bits for the more than one CBGs;
receiving a retransmission of the PDSCH that includes a subset of the more than one CBGs, the retransmission of the PDSCH being scheduled by using a CBG transmission information (CBGTI) field and a CBG flushing out information (CBGFI) field in the downlink control information format, wherein
the CBGTI field indicates the subset of the more than one CBGs to be retransmitted and the CBGFI field directly indicates whether soft combining is applied to the subset of the more than one CBGs or not; and
decoding the subset of the more than one CBGs according to the CBGTI field and the CBGFI field.
4. A communication method of a base station apparatus comprising:
transmitting a radio resource control message comprising first information used for configuring a number of more than one code block groups (CBGs) in a transport block (TB),
transmitting an initial transmission of a physical downlink shared channel (PDSCH) that includes the more than one CBGs, the more than one CBGs comprising first CBG(s) and second CBG(s), the initial transmission of the PDSCH being scheduled by using a new data indicator field in a downlink control information format;
determining a number of code blocks (CBs) in the TB, wherein
a first number, a second number, a third number, and a fourth number are given based on the number of more than one CBGs and the number of CBs,
the first number is a number of the first CBG(s),
the second number is a number of CB(s) comprised of each of the first CBG(s),
the third number is a number of the second CBG(s), and
the fourth number is a number of CB(s) comprised of each of the second CBG(s),
wherein, the second number and the fourth number are given by different calculation methods, and
the first CBG(s) and the second CBG(s) are included in a single TB received by a user equipment in the initial transmission of the PDSCH;
receiving respective hybrid automatic repeat request-ACK (HARQ-ACK) bits for the more than one CBGs; and
transmitting a retransmission of the PDSCH that includes a subset of the more than one CBGs, the retransmission of the PDSCH being scheduled by using a CBG transmission information (CBGTI) field and a CBG flushing out information (CBGFI) field in the downlink control information format, wherein
the CBGTI field indicates the subset of the more than one CBGs to be retransmitted and the CBGFI field directly indicates whether soft combining is applied to the subset of the more than one CBGs or not.