# US 12,119,918 B2 · Transmission schemes and modes and fallback schemes for the access link of systems operating in higher frequency bands preliminary class > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,119,918 B2 - Document ID: US12119918B2 - Status: Granted - Kind: B2 - Application number: 18/466,121 - Filed: 2023-09-13 - Published: 2024-02-22 - Granted: 2024-10-15 - Earliest claimed: 2015-11-10 - Assignees: InterDigital Patent Holdings, Inc. - Applicants: InterDigital Patent Holdings, Inc. - Inventors: Moon-il Lee; Yugeswar Deenoo; Tao Deng; Janet A. Stern-Berkowitz; Ravikumar V. Pragada; Mihaela C. Beluri - Web page: https://patentgrep.com/patent/US12119918B2 ## CPC - H04B 7/088: {using beam selection} - H04B 7/0408: using two or more beams, i.e. beam diversity - H04B 7/0417: Feedback systems - H04B 7/0628: {Diversity capabilities} - H04B 7/086: {using weights depending on external parameters, e.g. direction of arrival [DOA], predetermined weights or beamforming} - H04L 5/0023: {Time-frequency-space} - H04L 5/0044: {Allocation of payload; Allocation of data channels, e.g. PDSCH or PUSCH} - H04L 5/0053: {Allocation of signalling, i.e. of overhead other than pilot signals} - H04L 5/0014: {Three-dimensional division} - H04B: TRANSMISSION - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract A wireless transmit/receive unit (WTRU) may be configured to measure a downlink quality associated with at least one first beam. The WTRU may be configured to determine whether the measured downlink quality associated with the at least one first beam is below a threshold value. The WTRU may be configured to receive at least one control channel transmission using a determined second beam, based on, in part, a determination that the measured downlink quality associated with the at least one first beam is below the threshold value. The determined second beam used to receive the at least one control channel transmission may be a same beam that is used to receive an associated data channel transmission. The determined second beam may be from a set of beams. The set of beams may be received via higher layer signaling. ## Claims ### Claim 1 A wireless transmit/receive unit (WTRU) comprising: a transceiver; and a processor, wherein: the processor is configured to measure a downlink quality associated with at least one first beam; the processor is further configured to determine whether the measured downlink quality associated with the at least one first beam is below a threshold value; and the transceiver and the processor are further configured to receive at least one control channel transmission using a determined second beam, based on, in part, a determination that the measured downlink quality associated with the at least one first beam is below the threshold value, wherein the determined second beam used to receive the at least one control channel transmission is a same beam that is used to receive an associated data channel transmission. ### Claim 2 (depends on 1) The WTRU of claim 1, wherein the determined second beam is from a set of beams, wherein the set of beams are received via higher layer signaling. ### Claim 3 (depends on 1) The WTRU of claim 1, wherein the control channel transmission is a physical downlink control channel (PDCCH) transmission. ### Claim 4 (depends on 1) The WTRU of claim 1, wherein the data channel transmission is a physical downlink shared channel (PDSCH) transmission. ### Claim 5 (depends on 1) The WTRU of claim 1, wherein the at least one first beam is different than the determined second beam. ### Claim 6 (depends on 1) The WTRU of claim 1, wherein the transceiver and the processor are further configured to receive at least one control channel transmission of a third beam, based on, in part, a determination that the measured downlink quality is not below the threshold value, wherein the third beam is different than the determined second beam. ### Claim 7 (depends on 1) The WTRU of claim 1, wherein the determined second beam is a fallback beam. ### Claim 8 (depends on 1) The WTRU of claim 1, wherein the determined second beam is associated with a transmission scheme. ### Claim 9 (depends on 1) The WTRU of claim 1, wherein the measured downlink quality is reference signal received power (RSRP). ### Claim 10 (depends on 1) The WTRU of claim 1, wherein the processor is further configured to: measure a plurality of beams; and report an indication of a beam associated with a highest measured value to a base station. ### Claim 11 A method implemented by a wireless transmit/receive unit (WTRU), the method comprising: measuring a downlink quality associated with at least one first beam; determining whether the measured downlink quality associated with the at least one first beam is below a threshold value; and receiving at least one control channel transmission using a determined second beam, based on, in part, a determination that the measured downlink quality associated with the at least one first beam is below the threshold value, wherein the determined second beam used to receive the at least one control channel transmission is a same beam that is used to receive an associated data channel transmission. ### Claim 12 (depends on 11) The method of claim 11, wherein the determined second beam is from a set of beams, wherein the set of beams are received via higher layer signaling. ### Claim 13 (depends on 11) The method of claim 11, wherein the control channel transmission is a physical downlink control channel (PDCCH) transmission. ### Claim 14 (depends on 11) The method of claim 11, wherein the data channel transmission is a physical downlink shared channel (PDSCH) transmission. ### Claim 15 (depends on 11) The method of claim 11, wherein the at least one first beam is different than the determined second beam. ### Claim 16 (depends on 11) The method of claim 11, further comprising receiving at least one control channel transmission of a third beam, based on, in part, a determination that the measured downlink quality is not below the threshold value, wherein the third beam is different than the determined second beam. ### Claim 17 (depends on 11) The method of claim 11, wherein the determined second beam is a fallback beam. ### Claim 18 (depends on 11) The method of claim 11, wherein the determined second beam is associated with a transmission scheme. ### Claim 19 (depends on 11) The method of claim 11, wherein the measured downlink quality is reference signal received power (RSRP). ### Claim 20 (depends on 11) The method of claim 11, further comprising: measuring a plurality of beams; and reporting an indication of a beam associated with a highest measured value to a base station.