Method and device for providing multicasting and broadcasting in communication system
A method performed via a terminal in a communication system, may include: receiving, from a base station, semi persistent scheduling (SPS) configuration information from a base station; identifying, in the case that an SPS activation signal is detected, a set of SPS physical downlink shared channels (PDSCHs) based on the SPS configuration information and the SPS activation signal; receiving, from the base station, in the case that a plurality of SPS PDSCHs are included in the set of the SPS PDSCHs within one slot, data by based on selecting an SPS PDSCH with a lowest index; and excluding the selected SPS PDSCH and a PDSCH overlapped with the selected SPS PDSCH from the SPS PDSCH set, wherein in the case that there are two or more SPS PDSCHs with the lowest index, the data is received through the SPS PDSCH selected based on information included in the SPS activation signal.
1 . A method performed by a terminal in a communication system, the method comprising:
receiving, from a base station, semi persistent scheduling (SPS) configuration information;
identifying, in a case that downlink control information (DCI) for SPS activation is detected, a set of SPS physical downlink shared channels (PDSCHs) based on the SPS configuration information and the DCI;
in a case that a plurality of SPS PDSCHs are included in the set of the SPS PDSCHs within a slot, performing reception of an SPS PDSCH with a lowest index; and
performing exclusion of the received SPS PDSCH and a PDSCH that is overlapped with the received SPS PDSCH from the set of SPS PDSCHs,
wherein, in a case that there are two or more SPS PDSCHs with the lowest index and at least one bit of a field indicating a hybrid automatic repeat request (HARQ) process number included in the DCI is 1, an SPS PDSCH corresponding to the HARQ process number is received.
2 . The method of claim 1 ,
wherein a cyclic redundancy check (CRC) scrambled based on a terminal specific configured scheduling-radio network temporary identifier (CS-RNTI) is attached to the DCI.
3 . The method of claim 1 ,
wherein, in the case that there are two or more SPS PDSCHs with the lowest index and a priority bit field in the DCI is 1, an SPS PDSCH corresponding to the HARQ process number included in the DCI is received.
4 . The method of claim 1 , wherein the reception and exclusion are repeated until there is no SPS PDSCH in the set of SPS PDSCHs or until SPS PDSCHs corresponding to the number of SPS PDSCHs supported by the terminal are received, and
wherein a HARQ-ACK codebook for the received SPS PDSCH is transmitted to the base station.
5 . A method performed by a base station in a communication system, the method comprising:
transmitting, to a terminal, semi persistent scheduling (SPS) configuration information;
identifying a set of SPS physical downlink shared channels (PDSCHs) to be activated;
transmitting, to the terminal, downlink control information (DCI) for SPS activation;
in a case that the set of SPS PDSCHs includes a plurality of SPS PDSCHs within one slot, performing transmission of an SPS PDSCH with a lowest index; and
performing exclusion of the transmitted SPS PDSCH and a PDSCH that is overlapped with the transmitted SPS PDSCH from the set of SPS PDSCH,
wherein in a case that there are two or more SPS PDSCHs with the lowest index and at least one bit of a field indicating a hybrid automatic repeat request (HARQ) process number included in the DCI is 1, an SPS PDSCH corresponding to the HARQ process number is transmitted.
6 . The method of claim 5 ,
wherein a cyclic redundancy check (CRC) scrambled based on a terminal specific configured scheduling-radio network temporary identifier (CS-RNTI) is attached to the DCI.
7 . The method of claim 5 ,
wherein in the case that there are two or more SPS PDSCHs with the lowest index and a priority bit field in the DCI is 1, an SPS PDSCH corresponding to the HARQ process number included in the DCI is transmitted.
8 . The method of claim 5 , wherein the transmission and exclusion are repeated until there is no SPS PDSCH in the set of SPS PDSCHs or until SPS PDSCHs corresponding to the number of SPS PDSCHs supported by the terminal are transmitted, and
wherein a HARQ-ACK codebook for the transmitted SPS PDSCH is received from the terminal.
9 . A terminal in a communication system, the terminal comprising:
a transceiver; and
a controller coupled with the transceiver and configured to:
receive, from a base station, semi persistent scheduling (SPS) configuration information,
identify a set of SPS physical downlink shared channels (PDSCHs) based on the SPS configuration information and the SPS activation signal in a case that downlink control information (DCI) for SPS activation is detected,
in a case that a plurality of SPS PDSCHs are included in the set of SPS PDSCHs within a slot, perform reception of an SPS PDSCH with a lowest index, and
perform exclusion of the received SPS PDSCH and a PDSCH that is overlapped with the received SPS PDSCH from the set of SPS PDSCHs,
wherein in a case that there are two or more SPS PDSCHs with the lowest index and at least one bit of a field indicating a hybrid automatic repeat request (HARQ) process number included in the DCI is 1, an SPS PDSCH corresponding to the HARQ process number is received.
10 . The terminal of claim 9 ,
wherein a cyclic redundancy check (CRC) scrambled based on a terminal specific configured scheduling-radio network temporary identifier (CS-RNTI) is attached to the DCI.
11 . The terminal of claim 9 ,
wherein in the case that there are two or more SPS PDSCHs with the lowest index and a priority bit field in the DCI is 1, an SPS PDSCH corresponding to the HARQ process number included in the DCI is received.
12 . The terminal of claim 11 , wherein the reception and exclusion are repeated until there is no SPS PDSCH in the set of SPS PDSCHs or until SPS PDSCHs corresponding to the number of SPS PDSCHs supported by the terminal are selected, and
a HARQ-ACK codebook for the received SPS PDSCH is transmitted to the base station.
13 . A base station in a communication system, the base station comprising:
a transceiver; and
a controller coupled with the transceiver and configured to:
transmit, to a terminal, semi persistent scheduling (SPS) configuration information,
identify a set of SPS physical downlink shared channels (PDSCHs) to be activated,
transmit, to the terminal, downlink control information (DCI) for SPS activation,
in a case that a plurality of SPS PDSCHs are included in a set of SPS PDSCHs within one slot, perform transmission of an SPS PDSCH with a lowest index, and
perform exclusion of the transmitted SPS PDSCH and a PDSCH that is overlapped with the transmitted SPS PDSCH from the set of SPS PDSCHs,
wherein in a case that there are two or more SPS PDSCHs with the lowest index and at least one bit of a field indicating a hybrid automatic repeat request (HARQ) process number included in the DCI is 1, an SPS PDSCH corresponding to the HARQ process number is transmitted.
14 . The base station of claim 13 ,
wherein a cyclic redundancy check (CRC) scrambled based on a terminal specific configured scheduling-radio network temporary identifier (CS-RNTI) is attached to the DCI.
15 . The base station of claim 13 ,
wherein in the case that there are two or more SPS PDSCHs with the lowest index and a priority bit field in the DCI is 1, an SPS PDSCH corresponding to the HARQ process number included in the DCI is transmitted,
wherein the transmission and exclusion are repeated until there is no SPS PDSCH in the set of SPS PDSCHs or until SPS PDSCHs corresponding the number of SPS PDSCHs supported by the terminal are transmitted, and
wherein a HARQ-ACK codebook for the transmitted SPS PDSCH is received from the terminal.