# US 12,192,954 B2 · Paging indication of channel state information reference signal resources for beam refinement for a random access channel procedure > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,192,954 B2 - Document ID: US12192954B2 - Status: Granted - Kind: B2 - Application number: 17/450,947 - Filed: 2021-10-14 - Published: 2022-04-21 - Granted: 2025-01-07 - Earliest claimed: 2020-10-16 - Assignees: QUALCOMM Incorporated - Applicants: QUALCOMM Incorporated - Inventors: Mahmoud Taherzadeh Boroujeni; Jelena Damnjanovic; Tao Luo - Web page: https://patentgrep.com/patent/US12192954B2 ## CPC - H04W 68/005: {Transmission of information for alerting of incoming communication} - H04L 5/005: {of common pilots, i.e. pilots destined for multiple users or terminals} - H04L 5/0092: {Indication of how the channel is divided} - H04W 56/001: {Synchronization between nodes} - H04W 72/046: {the resource being in the space domain, e.g. beams} - H04W 74/0841: {with collision treatment} - H04W 74/0866: {using a dedicated channel for access} - H04L 5/0007: {the frequencies being orthogonal, e.g. OFDM(A) or DMT} - H04W 74/002: {Transmission of channel access control information} - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive a paging message that indicates a set of resources corresponding to a channel state information (CSI)-reference signal (CSI-RS) associated with a plurality of refined sub-beams of a synchronization signal block (SSB) beam. The UE may transmit, in a transmission associated with a physical random access channel (PRACH), an indication of a selected sub-beam of the plurality of refined sub-beams. Numerous other aspects are provided. ## Claims ### Claim 1 A user equipment (UE) for wireless communication, comprising: memory; and one or more processors, coupled to the memory, configured to: receive a paging message that includes an indication of a set of resources corresponding to a channel state information (CSI)-reference signal (CSI-RS) associated with a plurality of refined sub-beams of a synchronization signal block (SSB) beam; receive the CSI-RS based on the indication included in the paging message; and transmit, in a transmission associated with a physical random access channel (PRACH), an indication of a selected sub-beam of the plurality of refined sub-beams. ### Claim 2 (depends on 1) The UE of claim 1, wherein the transmission associated with the PRACH comprises a PRACH transmission. ### Claim 3 (depends on 1) The UE of claim 1, wherein the set of resources corresponding to the CSI-RS are explicitly scheduled by the paging message. ### Claim 4 (depends on 1) The UE of claim 1, wherein the set of resources corresponding to the CSI-RS are implicitly indicated based at least in part on one or more parameters indicated by the paging message. ### Claim 5 (depends on 4) The UE of claim 4, wherein the one or more parameters comprise at least one of: a time resource associated with one or more random access channel (RACH) occasions of the PRACH, or a frequency resource associated with one or more RACH occasions of the PRACH. ### Claim 6 (depends on 4) The UE of claim 4, wherein the one or more processors are further configured to determine the set of resources corresponding to the CSI-RS based at least in part on the one or more parameters. ### Claim 7 (depends on 1) The UE of claim 1, wherein the one or more processors, to transmit the indication of the selected sub-beam, are configured to transmit an indication of at least one of: a selected preamble sequence, or a selected random access channel (RACH) occasion corresponding to the selected preamble sequence. ### Claim 8 (depends on 7) The UE of claim 7, wherein the indication of the selected sub-beam is based at least in part on a mapping of the plurality of refined sub-beams to at least one of: a plurality of preamble sequences comprising the selected preamble sequence, or a plurality of RACH occasions comprising the selected RACH occasion. ### Claim 9 (depends on 8) The UE of claim 8, wherein the mapping of the plurality of refined sub-beams comprises a mapping of the set of resources corresponding to the CSI-RS to the at least one of: the plurality of preamble sequences comprising the selected preamble sequence, or the plurality of RACH occasions comprising the selected RACH occasion. ### Claim 10 (depends on 8) The UE of claim 8, wherein the mapping is based at least in part on a rule. ### Claim 11 (depends on 10) The UE of claim 10, wherein the rule is defined in a wireless communication specification. ### Claim 12 (depends on 8) The UE of claim 8, wherein the mapping is based at least in part on one or more mapping parameters. ### Claim 13 (depends on 12) The UE of claim 12, wherein the one or more mapping parameters are indicated by at least one of: the paging message, remaining minimum system information, or other system information. ### Claim 14 (depends on 1) The UE of claim 1, wherein the transmission associated with the PRACH comprises a CSI report associated with the PRACH. ### Claim 15 (depends on 14) The UE of claim 14, wherein the transmission is based at least in part on a mapping between at least one random access channel (RACH) occasion and at least one resource associated with the CSI report. ### Claim 16 (depends on 15) The UE of claim 15, wherein the mapping is defined in a wireless communication specification. ### Claim 17 (depends on 15) The UE of claim 15, wherein the paging message indicates the mapping. ### Claim 18 (depends on 1) The UE of claim 1, wherein the transmission comprises a physical uplink shared channel (PUSCH) transmission that occurs after a transmission of a random access channel preamble. ### Claim 19 (depends on 1) The UE of claim 1, wherein the transmission comprises a PUSCH portion of a request message of a two-step random access channel procedure. ### Claim 20 (depends on 1) The UE of claim 1, wherein the paging message indicates the set of resources corresponding to the CSI-RS based at least in part on at least one of: a determination that the SSB beam satisfies an SSB beam condition, a determination that one or more beam-specific bitfields in remaining minimum system information include one or more specified values, or a determination that a beam-specific property associated with the paging message satisfies a paging condition. ### Claim 21 (depends on 1) The UE of claim 1, wherein the one or more processors, to receive the paging message, are configured to receive the paging message based at least in part on the SSB comprising one of a subset of SSB beams of a set of SSB beams. ### Claim 22 (depends on 1) The UE of claim 1, wherein the set of resources corresponding to the CSI-RS comprises at least one of: a time domain resource, or a frequency domain resource. ### Claim 23 (depends on 1) The UE of claim 1, wherein the one or more processors are further configured to: receive the CSI-RS on the set of resources based on receipt of the paging message; and select the selected sub-beam from the plurality of refined sub-beams based on the CSI-RS, wherein the transmission associated with the PRACH comprises a CSI report that includes the indication of the selected sub-beam. ### Claim 24 A base station for wireless communication, comprising: memory; and one or more processors, coupled to the memory, configured to: transmit a paging message that includes an indication of a set of resources corresponding to a channel state information (CSI)-reference signal (CSI-RS) associated with a plurality of refined sub-beams of a synchronization signal block (SSB) beam; transmit the CSI-RS using the set of resources indicated in the paging message; and receive, in a transmission associated with a physical random access channel (PRACH), an indication of a selected sub-beam of the plurality of refined sub-beams. ### Claim 25 (depends on 24) The base station of claim 24, wherein the set of resources corresponding to the CSI-RS are explicitly scheduled by the paging message. ### Claim 26 (depends on 24) The base station of claim 24, wherein the set of resources corresponding to the CSI-RS are implicitly indicated based at least in part on one or more parameters indicated by the paging message. ### Claim 27 (depends on 24) The base station of claim 24, wherein the one or more processors, to receive the indication of the selected sub-beam, are configured to receive an indication of at least one of: a selected preamble sequence, or a selected random access channel (RACH) occasion corresponding to the selected preamble sequence. ### Claim 28 A method of wireless communication performed by a user equipment (UE), comprising: receiving a paging message that includes an indication of a set of resources corresponding to a channel state information (CSI)-reference signal (CSI-RS) associated with a plurality of refined sub-beams of a synchronization signal block (SSB) beam; receiving the CSI-RS based on the indication included in the paging message; and transmitting, in a transmission associated with a physical random access channel (PRACH), an indication of a selected sub-beam of the plurality of refined sub-beams. ### Claim 29 (depends on 28) The method of claim 28, wherein the set of resources corresponding to the CSI-RS are implicitly indicated based at least in part on one or more parameters indicated by the paging message. ### Claim 30 A method of wireless communication performed by a base station, comprising: transmitting a paging message that includes an indication of a set of resources corresponding to a channel state information (CSI)-reference signal (CSI-RS) associated with a plurality of refined sub-beams of a synchronization signal block (SSB) beam; transmitting the CSI-RS using the set of resources indicated in the paging message; and receiving, in a transmission associated with a physical random access channel (PRACH), an indication of a selected sub-beam of the plurality of refined sub-beams. ### Claim 31 (depends on 30) The method of claim 30, wherein the set of resources corresponding to the CSI-RS are implicitly indicated based at least in part on one or more parameters indicated by the paging message.