# US 11,909,538 B2 · Processing of portions of a transport block that fails a cyclic redundancy check > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,909,538 B2 - Document ID: US11909538B2 - Status: Granted - Kind: B2 - Application number: 17/451,225 - Filed: 2021-10-18 - Published: 2023-04-20 - Granted: 2024-02-20 - Earliest claimed: 2021-10-18 - Assignees: QUALCOMM Incorporated - Applicants: QUALCOMM Incorporated - Inventors: Jacob Pick; Assaf Touboul; Shay Landis; Shlomit Shaked; Michael Levitsky; Daniel Paz - Web page: https://patentgrep.com/patent/US11909538B2 ## CPC - H04L 1/0053: {specially adapted for power saving} - H04L 1/201: {Frame classification, e.g. bad, good or erased (frame indication per se H04L1/0082)} - H04L 1/0054: {Maximum-likelihood or sequential decoding, e.g. Viterbi, Fano, ZJ algorithms} - H04L 1/0061: {Error detection codes} - H04L 1/1614: {using bitmaps} - H04L 1/1829: Arrangements specially adapted for the receiver end - H04L 5/0055: {Physical resource allocation for ACK/NACK (for physical mapping arrangements in ARQ protocols H04L1/1861)} - H04L 25/067: {providing soft decisions, i.e. decisions together with an estimate of reliability (H04L25/068 and H04L25/069 take precedence; sequence estimation techniques H04L25/03178)} - H04L 1/0003: {by switching between different modulation schemes} - 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 transport block (TB), the receiving the TB including performing log likelihood ratio (LLR) calculations on one or more parts of the TB based at least in part on a determination that the TB is likely to fail a cyclic redundancy check (CRC). The UE may transmit an indication of the one or more parts of the TB for which the UE performed LLR calculations. Numerous other aspects are described. ## Claims ### Claim 1 A user equipment (UE) for wireless communication, comprising: a memory; and one or more processors, coupled to the memory, configured to: receive a transport block (TB); perform log likelihood ratio (LLR) calculations on fewer than all parts of the TB based at least in part on a determination, by the UE, that the TB is likely to fail a cyclic redundancy check (CRC), the determination that the TB is likely to fail the CRC based at least in part on one or more of channel state information of a channel on which the UE receives the TB or an attempt to receive a previous TB, and the determination that the TB is likely to fail the CRC being further based at least in part on a determination, by the UE, that performing the LLR calculations on the fewer than all the parts of the TB improves a likelihood of passing a subsequent CRC in a re-transmission of the TB; and transmit an indication of the fewer than all the parts of the TB for which the UE performed the LLR calculations. ### Claim 2 (depends on 1) The UE of claim 1, wherein the one or more processors are further configured to: receive the re-transmission of the TB based at least in part on the indication of the fewer than all the parts of the TB for which the UE performed the LLR calculations. ### Claim 3 (depends on 2) The UE of claim 2, wherein the re-transmission is associated with transmission parameters that are based at least in part on the indication of the fewer than all the parts of the TB for which the UE performed the LLR calculations. ### Claim 4 (depends on 1) The UE of claim 1, wherein the one or more processors are further configured to: transmit an indication of a capability of the UE to perform the LLR calculations on the fewer than all the parts of the TB based at least in part on the determination that the TB is likely to fail the CRC. ### Claim 5 (depends on 1) The UE of claim 1, wherein the one or more processors are configured to determine that the TB is likely to fail the CRC based at least in part on the attempt to receive the previous TB based at least in part on the previous TB and the TB being transmitted with a same set of transmission parameters. ### Claim 6 (depends on 1) The UE of claim 1, wherein performing the LLR calculations of the fewer than all the parts of the TB is further based at least in part on: a determination that performing additional LLR calculations of remaining parts of the TB is unnecessary to pass the subsequent CRC in the re-transmission of the TB. ### Claim 7 (depends on 1) The UE of claim 1, wherein the one or more processors are further configured to: transmit an indication of a capability of the UE to transmit the indication of the fewer than all the parts of the TB for which the UE performed the LLR calculations. ### Claim 8 (depends on 1) The UE of claim 1, wherein the one or more processors are further configured to: receive an indication of a granularity of the fewer than all the parts of the TB, or receive an indication of a granularity of the indication of the fewer than all the parts of the TB for which the UE performed the LLR calculations. ### Claim 9 (depends on 1) The UE of claim 1, wherein the one or more processors, to transmit the indication of the fewer than all the parts of the TB for which the UE performed the LLR calculations, are configured to: transmit an indication of one or more code block groups, one or more code blocks, or one or more code block parts for which the UE performed the LLR calculations. ### Claim 10 (depends on 1) The UE of claim 1, wherein the one or more processors, to transmit the indication of the fewer than all the parts of the TB for which the UE performed the LLR calculations, are configured to: transmit the indication within a negative acknowledgment message. ### Claim 11 A base station for wireless communication, comprising: a memory; and one or more processors, coupled to the memory, configured to: transmit configuration information indicating that a user equipment (UE) is to perform log likelihood ratio (LLR) calculations for fewer than all parts of a transport block (TB) based at least in part on a determination, by the UE, that the TB is likely to fail a cyclic redundancy check (CRC), the determination that the TB is likely to fail the CRC being based at least in part on one or more of the determination that the TB is likely to fail the CRC based at least in part on one or more of channel state information of a channel on which the UE receives the TB or an attempt to receive a previous TB; and receive an indication of the fewer than all parts of the TB for which the UE performed the LLR calculations. ### Claim 12 (depends on 11) The base station of claim 11, wherein the one or more processors are further configured to: transmit a re-transmission of the TB based at least in part on the indication of the fewer than all the parts of the TB for which the UE performed the LLR calculations. ### Claim 13 (depends on 12) The base station of claim 12, wherein the re-transmission is associated with transmission parameters that are based at least in part on the indication of the fewer than all the parts of the TB for which the UE performed the LLR calculations. ### Claim 14 (depends on 13) The base station of claim 13, wherein the transmission parameters that are based at least in part on the indication of the fewer than all the parts of the TB for which the UE performed the LLR calculations comprise one or more of: a redundancy version for the re-transmission, a modulation order for the re-transmission, or precoding for the re-transmission. ### Claim 15 (depends on 12) The base station of claim 12, wherein the one or more processors are further configured to transmit downlink control information to schedule the re-transmission, the downlink control information indicating one or more of: a redundancy version, for the re-transmission, selected based at least in part on the indication of the fewer than all the parts of the TB for which the UE performed the LLR calculations, or a modulation order, for the re-transmission, selected based at least in part on the indication of the fewer than all the parts of the TB for which the UE performed the LLR calculations. ### Claim 16 (depends on 11) The base station of claim 11, wherein the one or more processors are further configured to: receive an indication of a capability of the UE to perform the LLR calculations on the fewer than all the parts of the TB based at least in part on the determination that the TB is likely to fail the CRC. ### Claim 17 (depends on 11) The base station of claim 11, wherein the one or more processors are further configured to: receive an indication of a capability of the UE to transmit the indication of the fewer than all the parts of the TB for which the UE performed the LLR calculations. ### Claim 18 (depends on 11) The base station of claim 11, wherein the one or more processors are further configured to: transmit an indication of a granularity of the fewer than all the parts of the TB for which the UE performed the LLR calculations, or transmit an indication of a granularity of the indication of the fewer than all the parts of the TB for which the UE performed the LLR calculations. ### Claim 19 (depends on 11) The base station of claim 11, wherein the one or more processors, to receive the indication of the fewer than all the parts of the TB for which the UE performed the LLR calculations, are configured to: receive an indication of one or more code block groups, one or more code blocks, or one or more code block parts for which the UE performed the LLR calculations. ### Claim 20 (depends on 11) The base station of claim 11, wherein the one or more processors, to receive the indication of the fewer than all the parts of the TB for which the UE performed the LLR calculations, are configured to: receive the indication within a negative acknowledgment message. ### Claim 21 A method of wireless communication performed by a user equipment (UE), comprising: receiving a transport block (TB); performing log likelihood ratio (LLR) calculations on fewer than all parts of the TB based at least in part on a determination, by the UE, that the TB is likely to fail a cyclic redundancy check (CRC), the determination that the TB is likely to fail the CRC based at least in part on one or more of channel state information of a channel on which the UE receives the TB or an attempt to receive a previous TB, and the determination that the TB is likely to fail the CRC being further based at least in part on a determination, by the UE, that performing the LLR calculations on the fewer than all the parts of the TB improves a likelihood of passing a subsequent CRC in a re-transmission of the TB; and transmitting an indication of the fewer than all the parts of the TB for which the UE performed the LLR calculations. ### Claim 22 (depends on 21) The method of claim 21, further comprising: receiving the re-transmission of the TB based at least in part on the indication of the fewer than all the parts of the TB for which the UE performed the LLR calculations. ### Claim 23 (depends on 22) The method of claim 22, wherein the re-transmission is associated with transmission parameters that are based at least in part on the indication of the fewer than all the parts of the TB for which the UE performed the LLR calculations. ### Claim 24 (depends on 21) The method of claim 21, wherein performing the LLR calculations of the fewer than all the parts of the TB is further based at least in part on: a determination that performing additional LLR calculations of remaining parts of the TB is unnecessary to pass the subsequent CRC in the re-transmission of the TB. ### Claim 25 (depends on 21) The method of claim 21, further comprising: receiving an indication of a granularity of the fewer than all the parts of the TB for which the UE performed the LLR calculations, or receiving an indication of a granularity of the indication of the fewer than all the parts of the TB for which the UE performed the LLR calculations. ### Claim 26 A method of wireless communication performed by a base station, comprising: transmitting configuration information indicating that a user equipment (UE) is to perform log likelihood ratio (LLR) calculations for fewer than all parts of a transport block (TB) based at least in part on a determination, by the UE, that the TB is likely to fail a cyclic redundancy check (CRC), the determination that the TB is likely to fail the CRC being based at least in part on one or more of the determination that the TB is likely to fail the CRC based at least in part on one or more of channel state information of a channel on which the UE receives the TB or an attempt to receive a previous TB; and receiving an indication of the fewer than all parts of the TB for which the UE performed the LLR calculations. ### Claim 27 (depends on 26) The method of claim 26, further comprising: transmitting a re-transmission of the TB based at least in part on the indication of the fewer than all the parts of the TB for which the UE performed the LLR calculations. ### Claim 28 (depends on 27) The method of claim 27, wherein the re-transmission is associated with transmission parameters that are based at least in part on the indication of the fewer than all the parts of the TB for which the UE performed the LLR calculations. ### Claim 29 (depends on 28) The method of claim 28, wherein the transmission parameters that are based at least in part on the indication of the fewer than all the parts of the TB for which the UE performed the LLR calculations comprise one or more of: a redundancy version for the re-transmission, a modulation order for the re-transmission, or precoding for the re-transmission. ### Claim 30 (depends on 27) The method of claim 27, further comprising transmitting downlink control information to schedule the re-transmission, the downlink control information indicating one or more of: a redundancy version, for the re-transmission, selected based at least in part on the indication of the fewer than all the parts of the TB for which the UE performed the LLR calculations, or a modulation order, for the re-transmission, selected based at least in part on the indication of the fewer than all the parts of the TB for which the UE performed the LLR calculations. ### Claim 31 (depends on 26) The method of claim 26, further comprising: receiving an indication of a capability of the UE to perform the LLR calculations on the fewer than all the parts of the TB based at least in part on the determination that the transport block is likely to fail the CRC.