Granted Patent B2

US 12,328,596 · App. 18/422,927 · Granted Jun 10, 2025

Inventors: Hongbo Si (Plano, TX); Yingzhe Li (Sunnyvale, CA)

Assignee: Samsung Electronics Co., Ltd.

H04W16/14H04L5/0048H04W52/146H04W72/23

Abstract

Claims (78)

1. A base station in a communication system, the base station comprising:

a processor; and

a transceiver operably coupled to the processor, the transceiver configured to:

transmit, to a terminal, information indicating at least one synchronization signal and physical broadcast channel (SS/PBCH) block index, the SS/PBCH block index corresponding to one or more candidate SS/PBCH block indices; and

transmit, to the terminal, a SS/PBCH block among one or more SS/PBCH blocks having a candidate SS/PBCH block index corresponding to the SS/PBCH block index indicated by the information,

wherein the candidate SS/PBCH block index is one among indices for candidate SS/PBCH blocks indexed based on a number of the candidate SS/PBCH blocks in a half frame,

wherein, for operation with shared spectrum channel access, the SS/PBCH block index is determined based on a modulo operation based on the candidate SS/PBCH block index and a quasi-co-location (QCL) parameter, and

wherein, for operation without shared spectrum channel access, the SS/PBCH block index is same as the candidate SS/PBCH block index.

2. The base station of claim 1 , wherein a demodulation reference signal (DMRS) sequence of a PBCH in the SS/PBCH block or a scrambling sequence of the PBCH in the SS/PBCH block is based on:

three least significant bits (LSBs) of the candidate SS/PBCH block index in case that the number of the candidate SS/PBCH blocks in a half frame is equal to or greater than 8, and

two LSBs of the candidate SS/PBCH block index in case that the number of the candidate SS/PBCH blocks in a half frame is equal to 4.

3. The base station of claim 1 , wherein a payload of a PBCH in the SS/PBCH block is based on:

a most significant bit (MSB) of the candidate SS/PBCH block index in case that the number of the candidate SS/PBCH blocks in a half frame is equal to 10,

two MSBs of the candidate SS/PBCH block index in case that the number of the candidate SS/PBCH blocks in a half frame is equal to 20,

three MSBs of the candidate SS/PBCH block index in case that the number of the candidate SS/PBCH blocks in a half frame is equal to 64.

4. The base station of claim 1 , wherein a PBCH payload is scrambled using a first parameter (M) determined based on a second parameter (A) and the number of the candidate SS/PBCH blocks in the half frame, wherein the second parameter (A) is a number of scrambled bits in the PBCH payload, and wherein the first parameter (M) is determined as:

M=A−3 in case that the number of the candidate SS/PBCH blocks in the half frame is smaller than or equal to 8,

M=A−5 in case that the number of the candidate SS/PBCH blocks in the half frame is 20, and

M=A−6 in case that the number of the candidate SS/PBCH blocks in the half frame is 64.

5. The base station of claim 1 , wherein:

for operation with shared spectrum channel access, the transceiver is further configured to transmit, to the terminal, a ssb-Index indicating a SS/PBCH block index used for radio link monitoring (RLM),

the ssb-Index indicates to the terminal to perform the RLM using one or more SS/PBCH blocks in a discovery burst transmission window, and

the one or more SS/PBCH blocks in the discovery burst transmission window have a candidate SS/PBCH block index corresponding to the SS/PBCH block index provided by the ssb-Index.

6. The base station of claim 1 , wherein:

the SS/PBCH block index is used for indexing a reference signal for uplink power control of an uplink transmission, and

the uplink transmission is one of a physical uplink shared channel (PUSCH), a physical uplink control channel (PUCCH), and a sounding reference signal (SRS).

7. The base station of claim 1 , wherein, for operation with shared spectrum channel access, a set of symbols of a slot corresponding to one or more SS/PBCH blocks within a discovery burst transmission window having a candidate SS/PBCH block index corresponding to the SS/PBCH block index indicated by a ssb-PositionsInBurst in a system information block 1 (SIB1), or by a ssb-positionsInBurst in a ServingCellConfigCommon, is not indicated as uplink by slot format indicator (SFI) index field of a downlink control information (DCI) format 2_0.

8. A terminal in a communication system, the terminal comprising:

a processor; and

a transceiver operably coupled to the processor, the transceiver configured to:

receive, from a base station, information indicating at least one synchronization signal and physical broadcast channel (SS/PBCH) block index, the SS/PBCH block index corresponding to one or more candidate SS/PBCH block indices; and

receive, from the base station, a SS/PBCH block among one or more SS/PBCH blocks having a candidate SS/PBCH block index corresponding to the SS/PBCH block index indicated by the information,

wherein the candidate SS/PBCH block index is one among indices for candidate SS/PBCH blocks indexed based on a number of the candidate SS/PBCH blocks in a half frame,

wherein, for operation with shared spectrum channel access, the SS/PBCH block index is determined based on a modulo operation based on the candidate SS/PBCH block index and a quasi-co-location (QCL) parameter, and

wherein, for operation without shared spectrum channel access, the SS/PBCH block index is same as the candidate SS/PBCH block index.

9. The terminal of claim 8 , wherein a demodulation reference signal (DMRS) sequence of a PBCH in the SS/PBCH block or a scrambling sequence of the PBCH in the SS/PBCH block is based on:

three least significant bits (LSBs) of the candidate SS/PBCH block index in case that the number of the candidate SS/PBCH blocks in a half frame is equal to or greater than 8, and

two LSBs of the candidate SS/PBCH block index in case that the number of the candidate SS/PBCH blocks in a half frame is equal to 4.

10. The terminal of claim 8 , wherein a payload of a PBCH in the SS/PBCH block is based on:

a most significant bit (MSB) of the candidate SS/PBCH block index in case that the number of the candidate SS/PBCH blocks in a half frame is equal to 10,

two MSBs of the candidate SS/PBCH block index in case that the number of the candidate SS/PBCH blocks in a half frame is equal to 20, and

three MSBs of the candidate SS/PBCH block index in case that the number of the candidate SS/PBCH blocks in a half frame is equal to 64.

11. The terminal of claim 8 , wherein a PBCH payload is scrambled using a first parameter (M) determined based on a second parameter (A) and the number of the candidate SS/PBCH blocks in the half frame, wherein the second parameter (A) is a number of scrambled bits in the PBCH payload, and wherein the first parameter (M) is determined as:

M=A−3 in case that the number of the candidate SS/PBCH blocks in the half frame is smaller than or equal to,

M=A−5 in case that the number of the candidate SS/PBCH blocks in the half frame is 20, and

M=A−6 in case that the number of the candidate SS/PBCH blocks in the half frame is 64.

12. The terminal of claim 8 , wherein:

for operation with shared spectrum channel access, the transceiver is further configured to receive a ssb-Index indicating a SS/PBCH block index used for radio link monitoring (RLM) and the processor is configured to perform the RLM using one or more SS/PBCH blocks in a discovery burst transmission window, and

the one or more SS/PBCH blocks in the discovery burst transmission window have a candidate SS/PBCH block index corresponding to the SS/PBCH block index provided by ssb-Index.

13. The terminal of claim 8 , wherein:

the SS/PBCH block index is used for indexing a reference signal for uplink power control of an uplink transmission, and

the uplink transmission is one of a physical uplink shared channel (PUSCH), a physical uplink control channel (PUCCH), and a sounding reference signal (SRS).

14. The terminal of claim 8 , wherein:

in case that at least one resource element (RE) for a physical downlink control channel (PDCCH) candidate overlaps with at least one RE of one or more SS/PBCH blocks having a candidate SS/PBCH block index corresponding to the SS/PBCH block index, the PDCCH candidate is not monitored by the terminal, and

for operation with shared spectrum channel access, a set of symbols of a slot corresponding to the one or more SS/PBCH blocks within a discovery burst transmission window having a candidate SS/PBCH block index corresponding to the SS/PBCH block index indicated by a ssb-PositionsInBurst in a system information block 1 (SIB1), or by a ssb-positionsInBurst in a ServingCellConfigCommon, is not indicated as uplink by slot format indicator (SFI) index field of a downlink control information (DCI) format 2_0.

15. A method performed by a terminal in a communication system, the method comprising:

receiving, from a base station, information indicating at least one synchronization signal and physical broadcast channel (SS/PBCH) block index, the SS/PBCH block index corresponding to one or more candidate SS/PBCH block indices; and

receiving, from the base station, a SS/PBCH block among one or more SS/PBCH blocks having candidate SS/PBCH block index corresponding to the SS/PBCH block index indicated by the information,

wherein the candidate SS/PBCH block index is one among indices for candidate SS/PBCH blocks indexed based on a number of the candidate SS/PBCH blocks in a half frame,

wherein, for operation with shared spectrum channel access, the SS/PBCH block index is determined based on a modulo operation based on the candidate SS/PBCH block index and a quasi-co-location (QCL) parameter,

wherein, for operation without shared spectrum channel access, the SS/PBCH block index is same as the candidate SS/PBCH block index.

16. The method of claim 15 , wherein a demodulation reference signal (DMRS) sequence of a PBCH in the SS/PBCH block or a scrambling sequence of the PBCH in the SS/PBCH block is based on:

three least significant bits (LSBs) of the candidate SS/PBCH block index in case that the number of the candidate SS/PBCH blocks in a half frame is equal to or greater than 8, and

two LSBs of the candidate SS/PBCH block index in case that the number of the candidate SS/PBCH blocks in a half frame is equal to 4.

17. The method of claim 15 , wherein a payload of a PBCH in the SS/PBCH block is based on:

a most significant bit (MSB) of the candidate SS/PBCH block index in case that the number of the candidate SS/PBCH blocks in a half frame is equal to 10,

two MSBs of the candidate SS/PBCH block index in case that the number of the candidate SS/PBCH blocks in a half frame is equal to 20, and

three MSBs of the candidate SS/PBCH block index in case that the number of the candidate SS/PBCH blocks in a half frame is equal to 64.

18. The method of claim 15 , wherein a PBCH payload is scrambled using a first parameter (M) determined based on a second parameter (A) and the number of the candidate SS/PBCH blocks in the half frame, wherein the second parameter (A) is a number of scrambled bits in the PBCH payload, and wherein the first parameter (M) is determined as:

M=A−3 in case that the number of the candidate SS/PBCH blocks in the half frame is smaller than or equal to,

M=A−5 in case that the number of the candidate SS/PBCH blocks in the half frame is 20, and

M=A−6 in case that the number of the candidate SS/PBCH blocks in the half frame is 64.

19. The method of claim 15 , further comprising:

for operation with shared spectrum channel access, receiving a ssb-Index indicating a SS/PBCH block index used for radio link monitoring (RLM) and performing the RLM using one or more SS/PBCH blocks in a discovery burst transmission window,

wherein the one or more SS/PBCH blocks in the discovery burst transmission window have a candidate SS/PBCH block index corresponding to the SS/PBCH block index provided by ssb-Index.

20. The method of claim 15 , wherein:

the SS/PBCH block index is used for indexing a reference signal for uplink power control of an uplink transmission, and

the uplink transmission is one of a physical uplink shared channel (PUSCH), a physical uplink control channel (PUCCH), and a sounding reference signal (SRS).

Assignments (1)

Continuity (8)

References Cited (38)