SEARCH SPACE CONFIGURATIONS FOR RANDOM ACCESS MESSAGING
First Claim
1. A method for wireless communications at a user equipment (UE), comprising:
- transmitting, to a base station, a first random access (RACH) message based at least in part on a synchronization signal block (SSB) received by the UE on a first receive beam;
identifying a set of time resources used by the base station for transmission of one or more other SSBs from the base station;
identifying a search space for receiving a physical downlink control channel (PDCCH) message based at least in part on the first RACH message, wherein the identified search space comprises time resources that are different from the identified set of time resources; and
monitoring for the PDCCH message in the identified search space.
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0 Petitions
Accused Products
Abstract
Methods, systems, and devices for wireless communications are described. In some systems, a user equipment (UE) may perform a random access (RACH) procedure based on a selected synchronization signal block (SSB). During this RACH procedure, a base station may transmit physical downlink control channel (PDCCH) messages for UE RACH message handling. To receive PDCCH signaling for RACH Messages 2, 3, or 4 (Msg 2/3/4), the UE may identify a set of time resources used by the base station for transmitting SSBs that are not quasi-co-located (QCL) with the selected SSB. The UE may identify a Msg 2/3/4 search space that does not overlap with this identified set of resources, and may monitor this identified search space. The search space may correspond to a modified remaining minimum system information (RMSI) search space indicated by the base station, or a valid RMSI search space not indicated by the base station.
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Citations
66 Claims
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1. A method for wireless communications at a user equipment (UE), comprising:
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transmitting, to a base station, a first random access (RACH) message based at least in part on a synchronization signal block (SSB) received by the UE on a first receive beam; identifying a set of time resources used by the base station for transmission of one or more other SSBs from the base station; identifying a search space for receiving a physical downlink control channel (PDCCH) message based at least in part on the first RACH message, wherein the identified search space comprises time resources that are different from the identified set of time resources; and monitoring for the PDCCH message in the identified search space. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A method for wireless communications at a base station, comprising:
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receiving, from a user equipment (UE), a first random access (RACH) message based at least in part on a synchronization signal block (SSB) received by the UE on a first receive beam; identifying a set of time resources used for transmission of one or more other SSBs by the base station; identifying a search space for the UE to receive a physical downlink control channel (PDCCH) message based at least in part on the first RACH message, wherein the identified search space comprises time resources that are different from the identified set of time resources; mapping the PDCCH message to control channel elements (CCEs) within the identified search space; and transmitting, to the UE, the PDCCH message according to the mapping. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
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32. An apparatus for wireless communications at a user equipment (UE), comprising:
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means for transmitting, to a base station, a first random access (RACH) message based at least in part on a synchronization signal block (SSB) received by the UE on a first receive beam; means for identifying a set of time resources used by the base station for transmission of one or more other SSBs from the base station; means for identifying a search space for receiving a physical downlink control channel (PDCCH) message based at least in part on the first RACH message, wherein the identified search space comprises time resources that are different from the identified set of time resources; and means for monitoring for the PDCCH message in the identified search space.
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33. An apparatus for wireless communications at a base station, comprising:
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means for receiving, from a user equipment (UE), a first random access (RACH) message based at least in part on a synchronization signal block (SSB) received by the UE on a first receive beam; means for identifying a set of time resources used for transmission of one or more other SSBs by the base station; means for identifying a search space for the UE to receive a physical downlink control channel (PDCCH) message based at least in part on the first RACH message, wherein the identified search space comprises time resources that are different from the identified set of time resources; means for mapping the PDCCH message to control channel elements (CCEs) within the identified search space; and means for transmitting, to the UE, the PDCCH message according to the mapping.
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34. An apparatus for wireless communications at a user equipment (UE), comprising:
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a processor; memory in electronic communication with the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to; transmit, to a base station, a first random access (RACH) message based at least in part on a synchronization signal block (SSB) received by the UE on a first receive beam; identify a set of time resources used by the base station for transmission of one or more other SSBs from the base station; identify a search space for receiving a physical downlink control channel (PDCCH) message based at least in part on the first RACH message, wherein the identified search space comprises time resources that are different from the identified set of time resources; and monitor for the PDCCH message in the identified search space. - View Dependent Claims (35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53)
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54. An apparatus for wireless communications at a base station, comprising:
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a processor; memory in electronic communication with the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to; receive, from a user equipment (UE), a first random access (RACH) message based at least in part on a synchronization signal block (SSB) received by the UE on a first receive beam; identify a set of time resources used for transmission of one or more other SSBs by the base station; identify a search space for the UE to receive a physical downlink control channel (PDCCH) message based at least in part on the first RACH message, wherein the identified search space comprises time resources that are different from the identified set of time resources; map the PDCCH message to control channel elements (CCEs) within the identified search space; and transmit, to the UE, the PDCCH message according to the mapping. - View Dependent Claims (55, 56, 57, 58, 59, 60, 61, 62, 63, 64)
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65. A non-transitory computer-readable medium storing code for wireless communications at a user equipment (UE), the code comprising instructions executable by a processor to:
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transmit, to a base station, a first random access (RACH) message based at least in part on a synchronization signal block (SSB) received by the UE on a first receive beam; identify a set of time resources used by the base station for transmission of one or more other SSBs from the base station; identify a search space for receiving a physical downlink control channel (PDCCH) message based at least in part on the first RACH message, wherein the identified search space comprises time resources that are different from the identified set of time resources; and monitor for the PDCCH message in the identified search space.
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66. A non-transitory computer-readable medium storing code for wireless communications at a base station, the code comprising instructions executable by a processor to:
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receive, from a user equipment (UE), a first random access (RACH) message based at least in part on a synchronization signal block (SSB) received by the UE on a first receive beam; identify a set of time resources used for transmission of one or more other SSBs by the base station; identify a search space for the UE to receive a physical downlink control channel (PDCCH) message based at least in part on the first RACH message, wherein the identified search space comprises time resources that are different from the identified set of time resources; map the PDCCH message to control channel elements (CCEs) within the identified search space; and transmit, to the UE, the PDCCH message according to the mapping.
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Specification