Synchronization signal block and control resource set multiplexing
Methods, systems, and devices for synchronization signal (SS) block and control resource set (coreset) multiplexing are described. Generally, the described techniques allow a base station to indicate, to a user equipment (UE), the location of a coreset including control information that may be used by the UE. Specifically, a base station may transmit an indication of a coreset configuration and an indication of a type of multiplexing used to multiplex the coreset with an SS block in the SS block to a UE. Accordingly, the UE may receive the SS block, and the UE may determine the location of the coreset based on the coreset configuration and the indication of the type of multiplexing used to multiplex the coreset with the SS block. The UE may then process the control information included in the coreset to identify the location of a data channel including additional system information.
1. A method for wireless communication at a user equipment (UE), comprising:
receiving a synchronization signal (SS) block comprising a physical broadcast channel (PBCH);
identifying, from the PBCH, a control resource set (coreset) configuration indication which indicates a coreset configuration for a coreset that includes control information;
identifying, from the PBCH, a multiplexing indication which indicates whether the coreset and the SS block are time division multiplexed, frequency division multiplexed, or both;
determining the coreset based at least in part on the coreset configuration indication and the multiplexing indication; and
monitoring for the control information in the coreset.
2. The method of claim 1 , wherein determining the coreset further comprises:
identifying a type of multiplexing indicated by the multiplexing indication; and
identifying the coreset configuration that corresponds to the type of multiplexing.
3. The method of claim 1 , wherein determining the coreset further comprises:
identifying, based at least in part on the coreset configuration indication and the multiplexing indication, a location of the coreset; and
determining the coreset based at least in part on identifying the location of the coreset.
4. The method of claim 1 , wherein the coreset configuration indication comprises a relative position indication which indicates a relative position of the coreset in relation to the SS block when the multiplexing indication indicates that the coreset is frequency division multiplexed with the SS block.
5. The method of claim 4 , wherein the relative position indication indicates whether the coreset is above or below the SS block in a frequency domain.
6. The method of claim 5 , wherein the coreset and the SS block are separated by a guard band in the frequency domain.
7. The method of claim 6 , wherein the coreset and the SS block are associated with different numerologies.
8. The method of claim 4 , wherein the multiplexing indication and the relative position indication are combined into a multi-bit indicator in the PBCH.
9. The method of claim 4 , wherein a center frequency of the SS block is offset from a center frequency of the coreset by an integer number of resources blocks, and wherein the relative position indication indicates the offset.
10. The method of claim 1 , wherein the coreset is adjacent to the SS block in a frequency domain.
11. The method of claim 1 , further comprising:
determining a location of remaining minimum system information (RMSI) in a data channel based at least in part on the control information.
12. The method of claim 11 , wherein a location of the data channel is frequency offset from a location of another downlink channel to be used for communication with a base station.
13. The method of claim 12 , wherein the RMSI indicates the offset between the location of the data channel and the location of the another downlink channel.
14. The method of claim 12 , wherein the offset is between a center frequency of the data channel and a center frequency of the another downlink channel.
15. The method of claim 12 , wherein the offset is between a resource block at an edge of a bandwidth spanned by the data channel and a resource block at an edge of a bandwidth spanned by the another downlink channel.
16. The method of claim 1 , further comprising:
determining a configuration of a data channel comprising remaining minimum system information (RMSI) based at least in part on the coreset configuration.
17. The method of claim 1 , wherein the multiplexing indication further indicates whether a data channel comprising remaining minimum system information (RMSI) is time division multiplexed, frequency division multiplexed, or both with the SS block.
18. The method of claim 1 , further comprising:
identifying a location of a control channel in the coreset, the control channel comprising the control information; and
processing the control information in the control channel based at least in part on identifying the location of the control channel in the coreset.
19. A method for wireless communication at a base station, comprising:
identifying a synchronization signal (SS) block to transmit to one or more user equipment (UEs), the SS block comprising synchronization signals and a physical broadcast channel (PBCH);
identifying control information to transmit to the one or more UEs in a control channel of a control resource set (coreset);
transmitting the SS block comprising the synchronization signals and the PBCH, wherein the PBCH comprises a coreset configuration indication which indicates a configuration of the coreset and a multiplexing indication which indicates whether the coreset and the SS block are time division multiplexed, frequency division multiplexed, or both; and
transmitting the control information to the one or more UEs in the control channel of the coreset.
20. The method of claim 19 , wherein the coreset configuration indication comprises a relative position indication which indicates a relative position of the coreset in relation to the SS block when the multiplexing indication indicates that the coreset is frequency division multiplexed with the SS block.
21. The method of claim 20 , wherein the relative position indication indicates whether the coreset is above or below the SS block in a frequency domain.
22. The method of claim 20 , wherein the multiplexing indication and the relative position indication are combined as a multi-bit indicator in the PBCH.
23. A mobile device for wireless communication, comprising:
a processor, memory in electronic communication with the processor; and
instructions stored in the memory and executable by the processor to cause the mobile device to:
receive a synchronization signal (SS) block comprising a physical broadcast channel (PBCH);
identify, from the PBCH, a control resource set (coreset) configuration indication which indicates a coreset configuration for a coreset that includes control information;
identify, from the PBCH, a multiplexing indication which indicates whether the coreset and the SS block are time division multiplexed, frequency division multiplexed, or both;
determine the coreset based at least in part on the coreset configuration indication and the multiplexing indication; and
monitor for the control information in the coreset.
24. The mobile device of claim 23 , wherein the instructions to determine the coreset further are executable by the processor to cause the mobile device to:
identify a type of multiplexing indicated by the multiplexing indication; and
identify the coreset configuration that corresponds to the type of multiplexing.
25. The mobile device of claim 23 , wherein the instructions to determine the coreset further are executable by the processor to cause the mobile device to:
identify, based at least in part on the coreset configuration indication and the multiplexing indication, a location of the coreset; and
determine the coreset based at least in part on identifying the location of the coreset.
26. The mobile device of claim 23 , wherein the coreset configuration indication comprises a relative position indication that indicates whether the coreset is above or below the SS block in a frequency domain when the multiplexing indication indicates that the coreset is frequency division multiplexed with the SS block.
27. The mobile device of claim 26 , wherein a center frequency of the SS block is offset from a center frequency of the coreset by an integer number of resources blocks, and wherein the relative position indication indicates the offset.
28. The mobile device of claim 23 , wherein the instructions are further executable by the processor to cause the mobile device to:
determine a location of remaining minimum system information (RMSI) in a data channel based at least in part on the control information.
29. The mobile device of claim 23 , wherein the instructions are further executable by the processor to cause the mobile device to:
determine a configuration of a data channel comprising remaining minimum system information (RMSI) based at least in part on the coreset configuration.
30. A network device for wireless communication at a base station, comprising:
a processor,
memory in electronic communication with the processor; and
instructions stored in the memory and executable by the processor to cause the network device to:
identify a synchronization signal (SS) block to transmit to one or more user equipment (UEs), the SS block comprising synchronization signals and a physical broadcast channel (PBCH);
identify control information to transmit to the one or more UEs in a control channel of a control resource set (coreset);
transmit the SS block comprising the synchronization signals and the PBCH, wherein the PBCH comprises a coreset configuration indication which indicates a configuration of the coreset and a multiplexing indication which indicates whether the coreset and the SS block are time division multiplexed, frequency division multiplexed, or both; and
transmit the control information to the one or more UEs in the control channel of the coreset.