Method and device for providing multicasting and broadcasting in communication system
The present disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. According to the present disclosure, a method performed by a terminal in a communication system comprises: receiving semi persistent scheduling (SPS) configuration information from a base station; monitoring an SPS activation signal; confirming an SPS configuration corresponding to the SPS activation signal on the basis of the SPS configuration information, based on the SPS activation signal being sensed; receiving a physical downlink shared channel (PDSCH) from the base station on the basis of the SPS configuration; descrambling a PDSCH on the basis of a group-common configured scheduling radio network temporary identifier (CS-RNTI) based on the SPS configuration being a group-common SPS configuration; and descrambling the PDSCH on the basis of a terminal-specific CS-RNTI based on the SPS configuration being a terminal-specific SPS configuration.
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 including a group-common SPS configuration and a user equipment (UE)-specific SPS configuration, wherein each of the group-common SPS configuration and the UE-specific SPS configuration includes an SPS configuration index;
monitoring an SPS activation signal;
identifying, based on the SPS activation signal being detected, an SPS configuration corresponding to the SPS activation signal based on the SPS configuration information;
receiving, from the base station, a physical downlink shared channel (PDSCH) based on the SPS configuration;
based on the SPS configuration being the group-common SPS configuration, descrambling the PDSCH based on a group common configured scheduling radio network temporary identifier (G-CS-RNTI); and
based on the SPS configuration being the UE specific SPS configuration, descrambling the PDSCH based on a CS-RNTI,
wherein the SPS configuration index for the UE-specific SPS configuration and the SPS configuration index for the group-common SPS configuration do not have a same value.
2 . The method of claim 1 ,
wherein the SPS activation signal includes downlink control information (DCI), and
wherein a cyclic redundancy check (CRC) scrambled based on the CS-RNTI or the G-CS-RNTI is attached to the DCI.
3 . The method of claim 2 ,
wherein the SPS configuration corresponding to the SPS configuration index indicated by a field included in the DCI is activated, and
wherein modulation and coding scheme (mcs)-Table information for a group-common SPS PDSCH reception is separate configuration information from a mcs-Table information for a UE-specific SPS PDSCH reception.
4 . The method of claim 1 , further comprising:
receiving retransmission of the SPS activation signal;
discarding the retransmission of the SPS activation signal, wherein the retransmission of the SPS activation signal is transmitted in a specific slot determined based on the SPS configuration.
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 including a group-common SPS configuration and a user equipment (UE)-specific SPS configuration, wherein each of the group-common SPS configuration and the UE-specific SPS configuration includes an SPS configuration index;
transmitting, to the terminal, an SPS activation signal; and
transmitting a physical downlink shared channel (PDSCH) using an SPS configuration corresponding to the SPS activation signal identified based on the SPS configuration information,
wherein based on the SPS configuration being ethe group-common SPS configuration, the PDSCH is scrambled based on a group common configured scheduling radio network temporary identifier (G-CS-RNTI), and
based on the SPS configuration being the UE-specific SPS configuration, the PDSCH is scrambled based on a CS-RNTI,
wherein the SPS configuration index for the UE-specific SPS configuration and the SPS configuration index for the group-common SPS configuration do not have a same value.
6 . The method of claim 5 ,
wherein the SPS activation signal includes downlink control information (DCI), and
wherein a cyclic redundancy check (CRC) scrambled based on the CS-RNTI or the G-CS-RNTI is attached to the DCI.
7 . The method of claim 6 ,
wherein the SPS configuration corresponding to the SPS configuration index indicated by a field included in the DCI is activated, and
wherein modulation and coding scheme (mcs)-Table information for a group-common SPS PDSCH reception is separate configuration information from a mcs-Table information for a UE-specific SPS PDSCH reception.
8 . The method of claim 6 , further comprising:
performing, based on feedback information on the PDSCH not being received, retransmission of the activation signal in a specific slot,
wherein the specific slot is determined based on the SPS configuration.
9 . A terminal in a communication system, the terminal comprising:
a transceiver; and
a controller connected to the transceiver and configured to:
receive, from a base station, semi persistent scheduling (SPS) configuration information including a group-common SPS configuration and a user equipment (UE)-specific SPS configuration, wherein each of the group-common SPS configuration and the UE-specific SPS configuration includes an SPS configuration index,
monitor an SPS activation signal,
identify an SPS configuration corresponding to the SPS activation signal based on the SPS configuration information based on the SPS activation signal being detected,
receive, from the base station, a physical downlink shared channel (PDSCH) based on the SPS configuration,
descramble the PDSCH based on a group common configured scheduling radio network temporary identifier (G-CS-RNTI) based on the SPS configuration being the group-common SPS configuration, and
descramble the PDSCH based on a CS-RNTI based on the SPS configuration being the UE-specific SPS configuration,
wherein the SPS configuration index for the UE-specific SPS configuration and the SPS configuration index for the group-common SPS configuration do not have a same value.
10 . The terminal of claim 9 ,
wherein the SPS activation signal includes downlink control information (DCI), and
wherein a cyclic redundancy check (CRC) scrambled based on the CS-RNTI or the G-CS-RNTI is attached to the DCI.
11 . The terminal of claim 10 ,
wherein the SPS configuration corresponding to the SPS configuration index indicated by a field included in the DCI is activated, and
wherein modulation and coding scheme (mcs)-Table information for a group-common SPS PDSCH reception is separate configuration information from a mcs-Table information for a UE-specific SPS PDSCH reception.
12 . The terminal of claim 9 , wherein the controller is further configured to:
receive retransmission of the SPS activation signal, and
discard the retransmission of the SPS activation signal, wherein the retransmission of the SPS activation signal is transmitted in a specific slot determined based on the SPS configuration.
13 . A base station in a communication system, the base station comprising:
a transceiver; and
a controller connected to the transceiver and configured to:
transmit, to a terminal, semi persistent scheduling (SPS) configuration information including a group-common SPS configuration and a user equipment (UE)-specific SPS configuration, wherein each of the group-common SPS configuration and the UE-specific SPS configuration includes an SPS configuration index,
transmit, to the terminal, an SPS activation signal, and
transmit a physical downlink shared channel (PDSCH) using an SPS configuration corresponding to the SPS activation signal identified based on the SPS configuration information,
wherein based on the SPS configuration being the group-common SPS configuration, the PDSCH is scrambled based on a group common configured scheduling radio network temporary identifier (G-CS-RNTI), and
wherein based on the SPS configuration being the UE-specific SPS configuration, the PDSCH is scrambled based on a CS-RNTI,
wherein the SPS configuration index for the UE-specific SPS configuration and the SPS configuration index for the group-common SPS configuration do not have a same value.
14 . The base station of claim 13 ,
wherein the SPS activation signal includes downlink control information (DCI), and
wherein a cyclic redundancy check (CRC) scrambled based on the CS-RNTI or the G-CS-RNTI is attached to the DCI.
15 . The base station of claim 14 ,
wherein the SPS configuration corresponding to the SPS configuration index indicated by a field included in the DCI is activated, and
wherein modulation and coding scheme (mcs)-Table information for a group-common SPS PDSCH reception is separate configuration information from a mcs-Table information for a UE-specific SPS PDSCH reception.