# US 11,121,808 B2 · Method and apparatus for channel coding in the fifth generation new radio system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,121,808 B2 - Document ID: US11121808B2 - Status: Granted - Kind: B2 - Application number: 16/126,776 - Filed: 2018-09-10 - Published: 2019-03-28 - Granted: 2021-09-14 - Earliest claimed: 2017-09-08 - Assignees: Apple Inc. - Applicants: Apple Inc. - Inventors: Debdeep Chatterjee; Hong He; Gang Xiong; Ajit Nimbalker; Dmitry Dikarev; Yongjun Kwak - Web page: https://patentgrep.com/patent/US11121808B2 ## CPC - H04L 1/0058: {Block-coded modulation} - H04L 1/0041: {Arrangements at the transmitter end} - H04L 1/0057: {Block codes (H04L1/0061, H04L1/0064 take precedence)} - H04L 1/0061: {Error detection codes} - H04L 5/0044: {Allocation of payload; Allocation of data channels, e.g. PDSCH or PUSCH} - H04L 5/0051: {of dedicated pilots, i.e. pilots destined for a single user or terminal} - H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal - H04L 5/0007: {the frequencies being orthogonal, e.g. OFDM(A) or DMT} - H04L 5/0053: {Allocation of signalling, i.e. of overhead other than pilot signals} - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract Provided herein are method and apparatus for channel coding in the fifth Generation (5G) New Radio (NR) system. An embodiment provides an apparatus for a Next Generation NodeB (gNB), including circuitry, which is configured to: generate Downlink Control Information (DCI) payload for a NR-Physical Downlink Control Channel (NR-PDCCH); attach Cyclic Redundancy Check (CRC) to the DCI payload; mask the CRC with an Radio Network Temporary Identifier (RNTI) using a bitwise modulus 2 addition operation, wherein the number of bits for the RNTI is different from the number of bits for the CRC; and perform polar encoding for the DCI payload with the masked CRC. ## Claims ### Claim 1 A base station comprising: processing circuitry configured to: generate downlink control information (DCI) payload for a Physical Downlink Control Channel (PDCCH); attach a Cyclic Redundancy Check (CRC) to the DCI payload; mask the CRC with a Radio Network Temporary Identifier (RNTI), wherein the number of bits in the RNTI is different from the number of bits in the CRC; perform polar encoding on the DCI payload and the masked CRC, to obtain encoding output; perform rate matching on the encoding output to form a rate matched output; and scramble the rate matched output with a sequence that has been initialized using parameters, the parameters including the RNTI and a parameter associated with a control resource set (CORESET). ### Claim 2 (depends on 1) The base station of claim 1, wherein, when the number of bits in the RNTI is less than the number of bits in the CRC, a predetermined sequence is appended prior to the RNTI bits such that the number of bits in the RNTI appended with the predetermined sequence is equal to the number of bits in the CRC. ### Claim 3 (depends on 1) The base station of claim 1, wherein, when the number of bits in the RNTI is less than the number of bits in the CRC, a predetermined sequence is appended after the RNTI bits such that the number of bits in the RNTI appended with the predetermined sequence is equal to the number of bits in the CRC. ### Claim 4 (depends on 1) The base station of claim 1, wherein, when the number of bits in the RNTI is less than the number of bits in the CRC, the RNTI is extended by repeating a plurality of the RNTI bits. ### Claim 5 (depends on 1) The base station of claim 1, wherein, when the number of bits in the RNTI is larger than the number of bits in the CRC, the CRC is masked with a portion of the RNTI, wherein the portion of the RNTI has a same bit number as the CRC. ### Claim 6 (depends on 1) The base station of claim 1, wherein the RNTI is masked onto a portion of the CRC which appears relatively later in a decoding order of polar decoding. ### Claim 7 (depends on 1) The base station of claim 1, wherein the PDCCH conforms to the 3GPP 5G New Radio standard. ### Claim 8 (depends on 1) The base station of claim 1, wherein the processing circuitry is further configured to: interleave the DCI payload and the masked CRC prior to said polar encoding. ### Claim 9 A user equipment (UE), comprising: a radio frequency (RF) interface; and processing circuitry configured to: receive information from a Physical Downlink Control Channel (PDCCH); descramble the information with a sequence, to obtain descrambling output, wherein the sequence has been initialized using parameters, the parameters including the RNTI and a parameter associated with a control resource set (CORESET); perform polar decoding on the descrambling output to obtain downlink control information (DCI) payload and a masked CRC; demask the masked CRC with a masking sequence that includes at least a portion of a Radio Network Temporary Identifier (RNTI), wherein the number of bits in the RNTI is different from the number of bits in the masked CRC. ### Claim 10 (depends on 9) The UE of claim 9, wherein the processing circuitry is further configured to: check the DCI payload using the demasked CRC. ### Claim 11 (depends on 9) The UE of claim 9, wherein, when the number of bits in the RNTI is less than the number of bits in the masked CRC, the masking sequence is generated by appending a predetermined sequence prior to the RNTI bits. ### Claim 12 (depends on 9) The UE of claim 9, wherein, when the number of bits in the RNTI is less than the number of bits in the masked CRC, the masking sequence is generated by appending a predetermined sequence after the RNTI bits. ### Claim 13 (depends on 9) The UE of claim 9, wherein, when the number of bits in the RNTI is less than the number of bits in the masked CRC, the masking sequence is generated by periodically extending the RNTI. ### Claim 14 (depends on 9) The UE of claim 9, wherein, when the number of bits in the RNTI is larger than the number of bits in the masked CRC, said demasking includes demasking the masked CRC with said portion of the RNTI, wherein said portion has a same number of bits as the masked CRC. ### Claim 15 (depends on 9) The UE of claim 9, wherein said demasking is performed so that a portion of the masked CRC that appears relatively later in a polar decoding order interacts with the RNTI. ### Claim 16 (depends on 9) The UE of claim 9, further comprising: an antenna subsystem coupled to the RF interface. ### Claim 17 (depends on 9) The UE of claim 9, wherein the processing circuitry is further configured to: deinterleave the DCI payload and the masked CRC prior to said demasking. ### Claim 18 An apparatus, comprising: a processor configured to cause a user equipment (UE) to: receive information from a Physical Downlink Control Channel (PDCCH); descramble the information with a sequence, to obtain descrambling output, wherein the sequence has been initialized using parameters, the parameters including the RNTI and a parameter associated with a control resource set (CORESET); perform polar decoding on the descrambling output to obtain downlink control information (DCI) payload and a masked CRC; demask the masked CRC with a masking sequence that includes at least a portion of a Radio Network Temporary Identifier (RNTI), wherein the number of bits in the RNTI is different from the number of bits in the masked CRC. ### Claim 19 (depends on 18) The apparatus of claim 18, wherein the processor is further configured to: check the DCI payload DCI using the demasked CRC. ### Claim 20 (depends on 18) The apparatus of claim 18, wherein, when the number of bits in the RNTI is less than the number of bits in the masked CRC, the masking sequence is generated by appending a predetermined sequence prior to the RNTI bits. ### Claim 21 (depends on 18) The apparatus of claim 18, wherein, when the number of bits in for the RNTI is less than the number of bits in the masked CRC, the masking sequence is generated by appending a predetermined sequence after the RNTI bits. ### Claim 22 (depends on 18) The apparatus of claim 18, wherein, when the number of bits in for the RNTI is less than the number of bits in the masked CRC, the masking sequence is generated by periodically extending the RNTI. ### Claim 23 (depends on 18) The apparatus of claim 18, wherein, when the number of bits in for the RNTI is larger than the number of bits in the masked CRC, said demasking includes demasking the masked CRC with said portion of the RNTI, wherein said portion has a same number of bits as the masked CRC. ### Claim 24 (depends on 18) The apparatus of claim 18, wherein said demasking is performed so that a portion of the masked CRC that appears relatively later in an order of the polar decoding interacts with the RNTI. ### Claim 25 (depends on 18) The apparatus of claim 18, wherein the processor is further configured to: deinterleave the DCI payload and the masked CRC prior to said demasking.