Terminal apparatus, base station apparatus, and communication method to set value of frequency domain resource assignment field based on bandwidth of resource blocks
A terminal apparatus includes a receiver configured to monitor a PDCCH with a DCI format in a control resource set, and receive a PDSCH scheduled by the DCI format, wherein the DCI format includes a frequency domain resource assignment field, in a case that the number of bits of the frequency domain resource assignment field is given at least based on the number N target RB of resource blocks of a first bandwidth, and the frequency domain resource assignment field is applied to the first bandwidth, a value N RIV indicated by the frequency domain resource assignment field is given based on a first method, and in a case that the number of bits of the frequency domain resource assignment field is given at least based on the number N size RB of resource blocks of a second bandwidth, and the frequency domain resource assignment field is applied to the first bandwidth, the value N RIV is given based on a second method.
1. A terminal apparatus comprising:
a receiver configured to monitor a Physical Downlink Control CHannel (PDCCH) with a Downlink Control Information (DCI) format in a control resource set, and receive a Physical Downlink Shared CHannel (PDSCH) scheduled by the DCI format, wherein
the DCI format includes a frequency domain resource assignment field,
in a case that a number of bits of the frequency domain resource assignment field is given at least based on a number of resource blocks (N target RB ) of a first bandwidth, and the frequency domain resource assignment field applies to the first bandwidth, a value N RIV indicated by the frequency domain resource assignment field is given based on a first method,
in a case that a number of bits of the frequency domain resource assignment field is given at least based on a number of resource blocks (N size RB ) of a second bandwidth which is different from the first bandwidth, and the frequency domain resource assignment field applies to the first bandwidth, the value N RIV is given based on a second method which is different from the first method,
in the first method, the N RIV is equal to N target RB *(L RBs −1)+RB start if L RBs −1 is smaller than or equal to floor(N target RB /2), and the N RIV is equal to N target RB *(N target RB −L RBs +1)+N target RB −1−RB start , if L RBs −1 is larger than floor(N target RB /2), where the floor(N target RB /2) is a largest integer within a range that does not exceed the N target RB /2, the N target RB is a number of resource blocks to which the frequency domain resource assignment field applies, the RB start is an starting index for resource block(s) on which the PDSCH is mapped, and L RBs is a number of the resource block(s) on which the PDSCH is mapped,
in the second method, the N RIV is equal to N size RB *(L 2 RBs −1)+RB 2 start , if L 2 RBs −1 is smaller than or equal to floor(N size RB /2), and the N RIV is equal to N size RB *(N size RB −L 2 RBs +1)+N size RB −1−RB 2 start , if L 2 RBs −1 is larger than floor(N size RB /2), where the floor(N size RB /2) is a largest integer within a range that does not exceed the N size RB /2, the RB 2 start is given by the RB start divided by K, and the L 2 RBs is given by L RBs divided by the K,
in the second method, in a case that N target RB >N size RB is satisfied, the K is the maximum value among 1, 2, 4 and 8 under a condition satisfying k≤floor(N target RB /N size RB ), and
in the second method, in a case that N target RB >N size RB is not satisfied, the K is equal to 1.
2. A base station apparatus comprising:
a transmitter configured to transmit a Physical Downlink Control CHannel (PDCCH) with a Downlink Control Information (DCI) format in a control resource set, and transmit a Physical Downlink Shared CHannel (PDSCH) scheduled by the DCI format, wherein
the DCI format includes a frequency domain resource assignment field,
in a case that a number of bits of the frequency domain resource assignment field is given at least based on a number of resource blocks (N target RB ) of a first bandwidth, and the frequency domain resource assignment field applies to the first bandwidth, a value N RIV indicated by the frequency domain resource assignment field is given based on a first method,
in a case that a number of bits of the frequency domain resource assignment field is given at least based on a number of resource blocks (N size RB ) of a second bandwidth which is different from the first bandwidth, and the frequency domain resource assignment field applies to the first bandwidth, the value N RIV is given based on a second method which is different from the first method,
in the first method, the N RIV is equal to N target RB *(L RBs −1)+RB start if L RBs −1 is smaller than or equal to floor(N target RB /2), and the N RIV is equal to N target RB *(N target RB −L RBs +1)+N target RB −1−RB start , if L RBs −1 is larger than floor(N target RB /2), where the floor(N target RB /2) is a largest integer within a range that does not exceed the N target RB /2, the N target RB is a number of resource blocks to which the frequency domain resource assignment field applies, the RB start is an starting index for resource block(s) on which the PDSCH is mapped, and L RBs is a number of the resource block(s) on which the PDSCH is mapped,
in the second method, the N RIV is equal to N size RB *(L 2 RBs −1)+RB 2 start , if L 2 RBs −1 is smaller than or equal to floor(N size RB /2), and the N RIV is equal to N size RB *(N size RB −L 2 RBs +1)+N size RB −1−RB 2 start , if L 2 RBs −1 is larger than floor(N size RB /2), where the floor(N size RB /2) is a largest integer within a range that does not exceed the N size RB /2, the RB 2 start is given by the RB start divided by K, and the L 2 RBs is given by L RBs divided by the K,
in the second method, in a case that N target RB >N size RB is satisfied, the K is the maximum value among 1, 2, 4, and 8 under a condition satisfying K floor(N target RB /N size RB ), and
in the second method, in a case that N target RB >N size RB is not satisfied, the K is equal to 1.
3. A communication method used for a terminal apparatus, the communication method comprising:
monitoring a Physical Downlink Control CHannel (PDCCH) with a Downlink Control Information (DCI) format in a control resource set; and
receiving a Physical Downlink Shared CHannel (PDSCH) scheduled by the DCI format, wherein
the DCI format includes a frequency domain resource assignment field,
in a case that a number of bits of the frequency domain resource assignment field is given at least based on a number of resource blocks (N target RB ) of a first bandwidth, and the frequency domain resource assignment field applies to the first bandwidth, a value N RIV indicated by the frequency domain resource assignment field is given based on a first method,
in a case that a number of bits of the frequency domain resource assignment field is given at least based on a number of resource blocks (N size RB ) of a second bandwidth which is different from the first bandwidth, and the frequency domain resource assignment field applies to the first bandwidth, the value N RIV is given based on a second method which is different from the first method,
in the first method, the N RIV is equal to N target RB *(L RBs −1)+RB start in response to L RBs −1 being smaller than or equal to floor(N target RB /2), and the N RIV is equal to N target RB *(N target RB −L RBs +1)+N target RB −1−RB start , in response to L RBs −1 being larger than floor(N target RB /2), where the floor(N target RB /2) is a largest integer within a range that does not exceed the N target RB /2, the N target RB is a number of resource blocks to which the frequency domain resource assignment field applies, the RB start is an starting index for resource block(s) on which the PDSCH is mapped, and L RBs is a number of the resource block(s) on which the PDSCH is mapped,
in the second method, the N RIV is equal to N size RB *(L 2 RBs −1)+RB 2 start , in response to L 2 RBs −1 being smaller than or equal to floor(N size RB /2), and the N RIV is equal to N size RB *(N size RB −L 2 RBs +1)+N size RB −1−RB 2 start , in response to L 2 RBs −1 being larger than floor(N size RB /2), where the floor(N size RB /2) is a largest integer within a range that does not exceed the N size RB /2, the RB 2 start is given by the RB start divided by K, and the L 2 RBs is given by L RBs divided by the K,
in the second method, in a case that N target RB >N size RB is satisfied, the K is the maximum value among 1, 2, 4, and 8 under a condition satisfying K floor(N target RB /N size RB ), and
in the second method, in a case that N target RB >N size RB is not satisfied, the K is equal to 1.
4. A communication method used for a base station apparatus, the communication method comprising:
transmitting a Physical Downlink Control CHannel (PDCCH) with a Downlink Control Information (DCI) format in a control resource set; and
transmitting a Physical Downlink Shared CHannel (PDSCH) scheduled by the DCI format, wherein
the DCI format includes a frequency domain resource assignment field,
in a case that a number of bits of the frequency domain resource assignment field is given at least based on a number of resource blocks (N target RB ) of a first bandwidth, and the frequency domain resource assignment field applies to the first bandwidth, a value N RIV indicated by the frequency domain resource assignment field is given based on a first method,
in a case that a number of bits of the frequency domain resource assignment field is given at least based on a number of resource blocks (N size RB ) of a second bandwidth which is different from the first bandwidth, and the frequency domain resource assignment field applies to the first bandwidth, the value N RIV is given based on a second method which is different from the first method,
in the first method, the N RIV is equal to N target RB *(L RBs −1)+RB start in response to L RBs −1 being smaller than or equal to floor(N target RB /2), and the N RIV is equal to N target RB *(N target RB −L RBs +1)+N target RB −1−RB start , in response to L RBs −1 being larger than floor(N target RB /2), where the floor(N target RB /2) is a largest integer within a range that does not exceed the N target RB /2, the N target RB is a number of resource blocks to which the frequency domain resource assignment field applies, the RB start is an starting index for resource block(s) on which the PDSCH is mapped, and L RBs is a number of the resource block(s) on which the PDSCH is mapped,
in the second method, the N RIV is equal to N size RB *(L 2 RBs −1)+RB 2 start , in response to L 2 RBs −1 being smaller than or equal to floor(N size RB /2), and the N RIV is equal to N size RB *(N size RB −L 2 RBs +1)+N size RB −1−RB 2 start , in response to L 2 RBs −1 being larger than floor(N size RB /2), where the floor(N size RB /2) is a largest integer within a range that does not exceed the N size RB /2, the RB 2 star t is given by the RB start divided by K, and the L 2 RBs is given by L RBs divided by the K,
in the second method, in a case that N target RB >N size RB is satisfied, the K is the maximum value among 1, 2, 4, and 8 under a condition satisfying K floor(N target RB /N size RB ), and
in the second method, in a case that N target R B >N size RB is not satisfied, the K is equal to 1.