Method and apparatus for configuration of common search space for discovery signal and channel
A method of a UE in a wireless communication system supporting a shared spectrum channel access is provided. The UE comprises: receiving, from a BS over a first downlink channel, a SS/PBCH block; determining a transmission window in which the received SS/PBCH block is located; determining whether a CORESET for Type0-PDCCH CSS is present based on the received SS/PBCH block; determining a parameter for a QCL assumption of candidate SS/PBCH blocks within the transmission window; determining a group of QCLed candidate SS/PBCH blocks within the transmission window based on the determined parameter for the QCL assumption; determining a group of slots including the Type0-PDCCH CSS, wherein each slot of the group of slots corresponds to a candidate SS/PBCH block within the group of QCLed candidate SS/PBCH blocks; and receiving, over a second downlink channel, at least one Type0-PDCCH based on the determined groups of slots including the Type0-PDCCH CSS.
1. A method performed by a terminal supporting a shared spectrum in a communication system, the method comprising:
receiving, from a base station, a synchronization signal and physical broadcast channel (SS/PBCH) block; and
receiving, from the base station, a physical downlink control channel (PDCCH) by monitoring a common search space (CSS) set over slots including a monitoring occasion associated with candidate SS/PBCH blocks that are quasi co-located (QCLed) with the received SS/PBCH block based on a QCL parameter,
wherein the monitoring occasion associated with each of the candidate SS/PBCH blocks is included in two consecutive slots that are determined based on (i) a candidate SS/PBCH block index and (ii) a parameter determined based on the received SS/PBCH block, and
wherein the parameter determined based on the received SS/PBCH block is not determined as 2, in response to the QCL parameter being 1.
2. The method of claim 1 , wherein the received SS/PBCH block includes information on a control resource set (CORESET) for a Type0-PDCCH CSS set.
3. The method of claim 1 , wherein the candidate SS/PBCH block index is one of {0, 1, . . . , 9} based on a subcarrier spacing (SCS) of the candidate SS/PBCH blocks being 15 KHz, and
wherein the candidate SS/PBCH block index is one of {0, 1, . . . , 19} based on the SCS of the candidate SS/PBCH blocks being 30 KHz.
4. The method of claim 1 , wherein the candidate SS/PBCH blocks that are QCLed with the received SS/PBCH block correspond to same modulo value based on the QCL parameter.
5. A method performed by a base station supporting a shared spectrum in a communication system, the method comprising:
transmitting, to a terminal, a synchronization signal and physical broadcast channel (SS/PBCH) block; and
transmitting, to the terminal, a physical downlink control channel (PDCCH) in at least one common search space (CSS) set included in slots including a monitoring occasion associated with candidate SS/PBCH blocks that are quasi co-located (QCLed) with the transmitted SS/PBCH block based on a QCL parameter,
wherein the monitoring occasion associated with each of the candidate SS/PBCH blocks is included in two consecutive slots determined that are based on (i) a candidate SS/PBCH block index and (ii) a parameter determined based on the transmitted SS/PBCH block, and
wherein the parameter determined based on the transmitted SS/PBCH block is not determined as 2, in response to the QCL parameter being 1.
6. The method of claim 5 , wherein the transmitted SS/PBCH block includes information on a control resource set (CORESET) for a Type0-PDCCH CSS set.
7. The method of claim 5 , wherein the candidate SS/PBCH block index is one of {0, 1, . . . , 9} based on a subcarrier spacing (SCS) of the candidate SS/PBCH blocks being 15 KHz, and
wherein the candidate SS/PBCH block index is one of {0, 1, . . . , 19} based on the SCS of the candidate SS/PBCH blocks being 30 KHz.
8. The method of claim 5 , wherein the candidate SS/PBCH blocks that are QCLed with the transmitted SS/PBCH block correspond to same modulo value based on the QCL parameter.
9. A terminal supporting a shared spectrum in a communication system, the terminal comprising:
a transceiver configured to:
receive, from a base station, a synchronization signal and physical broadcast channel (SS/PBCH) block; and
receive, from the base station, a physical downlink control channel (PDCCH) by monitoring a common search space (CSS) set over slots including a monitoring occasion associated with candidate SS/PBCH blocks that are quasi co-located (QCLed) with the received SS/PBCH block based on a QCL parameter,
wherein the monitoring occasion associated with each of the candidate SS/PBCH blocks is included in two consecutive slots that are determined based on (i) a candidate SS/PBCH block index and (ii) a parameter determined based on the received SS/PBCH block, and
wherein the parameter determined based on the received SS/PBCH block is not determined as 2, in response to the QCL parameter being 1.
10. The terminal of claim 9 , wherein the received SS/PBCH block includes information on a control resource set (CORESET) for a Type0-PDCCH CSS set.
11. The terminal of claim 9 , wherein the candidate SS/PBCH block index is one of {0, 1, . . . , 9} based on a subcarrier spacing (SCS) of the candidate SS/PBCH blocks being 15 KHz, and
wherein the candidate SS/PBCH block index is one of {0, 1, . . . , 19} based on the SCS of the candidate SS/PBCH blocks being 30 KHz.
12. The terminal of claim 9 , wherein the candidate SS/PBCH blocks that are QCLed with the received SS/PBCH block correspond to same modulo value based on the QCL parameter.
13. A base station supporting a shared spectrum in a communication system, the base station comprising:
a transceiver configured to:
transmit, to a terminal, a synchronization signal and physical broadcast channel (SS/PBCH) block; and
transmit, to the terminal, a physical downlink control channel (PDCCH) in at least one common search space (CSS) set included in slots including a monitoring occasion associated with candidate SS/PBCH blocks that are quasi co-located (QCLed) with the transmitted SS/PBCH block based on a QCL parameter,
wherein the monitoring occasion associated with each of the candidate SS/PBCH blocks is included in two consecutive slots that are determined based on (i) a candidate SS/PBCH block index and (ii) a parameter determined based on the transmitted SS/PBCH block, and
wherein the parameter determined based on the transmitted SS/PBCH block is not determined as 2, in response to the QCL parameter being 1.
14. The base station of claim 13 , wherein the transmitted SS/PBCH block includes information on a control resource set (CORESET) for a Type0-PDCCH CSS set.
15. The base station of claim 13 , wherein the candidate SS/PBCH block index is one of {0, 1, . . . , 9} based on a subcarrier spacing (SCS) of the candidate SS/PBCH blocks being 15 KHz, and
wherein the candidate SS/PBCH block index is one of {0, 1, . . . , 19} based on the SCS of the candidate SS/PBCH blocks being 30 KHz.
16. The base station of claim 13 , wherein the candidate SS/PBCH blocks that are QCLed with the transmitted SS/PBCH block correspond to same modulo value based on the QCL parameter.