# US 2021/0242980 A1 · Ue, base station, and data transmission method and apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0242980 A1 - Document ID: US20210242980A1 - Status: Published application - Kind: A1 - Application number: 17/267,338 - Filed: 2019-07-19 - Published: 2021-08-05 - Earliest claimed: 2018-08-10 - Assignees: Beijing Unisoc Communications Technology Co., Ltd. - Applicants: Beijing Unisoc Communications Technology Co., Ltd. - Inventors: Sa ZHANG - Web page: https://patentgrep.com/patent/US20210242980A1 ## CPC - H04L 1/1822: involving configuration of automatic repeat request [ARQ] with parallel processes - H04L 1/1896: {ARQ related signaling} - H04L 1/1819: {with retransmission of additional or different redundancy} - H04L 1/1887: {Scheduling and prioritising arrangements} - H04W 72/21: in the uplink direction of a wireless link, i.e. towards the network - H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal - H04W 74/08: Non-scheduled access, e.g. ALOHA (hybrid access H04W74/02) - H04L 1/1614: {using bitmaps} - H04L 1/1671: {the supervisory signal being transmitted together with control information} - H04W 72/1268: of uplink data flows - H04W 74/0808: using carrier sensing, e.g. carrier sense multiple access [CSMA] - 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 UE, base station and data transmission method and apparatus. The method includes: in an unlicensed frequency band of 5G NR, a UE transmitting uplink data and associated UCI to a base station through AUL transmission; the base station identifying the UE through UE specific DMRS; the base station decoding the UCI; if the UCI is successfully decoded, the base station decoding the uplink data; based on whether a transport block or CBG is successfully decoded, the base station transmitting DFI to the UE, the DFI including first information used to indicate a location of the successfully decoded CBG; the UE receiving the DFI; the UE using the first information to determine HARQ-ID of a transport block where the CBG that needs to be retransmitted is located, and a sequence number of the CBG in a HARQ of the transport block where the CBG is located; the UE performing scheduling-free retransmission. ## Claims ### Claim 1 A data transmission method, comprising: in an unlicensed frequency band of 5G New Radio (NR), a User Equipment (UE) transmitting uplink data and associated Uplink Control Information (UCI) to a base station through Autonomous UpLink (AUL) transmission; the base station identifying the UE through UE specific Demodulation Reference Signal (DMRS); the base station decoding the UCI; if the UCI is successfully decoded, the base station decoding the uplink data; based on whether a transport block or a Code Block Group (CBG) is successfully decoded, the base station transmitting Downlink Feedback Information (DFI) to the UE, wherein the DFI comprises first information that is used to indicate a location of the successfully decoded CBG; the UE receiving the DFI; the UE using the first information to determine Hybrid Automatic Repeat reQuest-IDentity (HARQ-ID) of a transport block where the CBG that needs to be retransmitted is located, and a sequence number of the CBG that needs to be retransmitted in a HARQ of the transport block where the CBG that needs to be retransmitted is located; and the UE performing scheduling-free retransmission. ### Claim 2 (depends on 1) The data transmission method according to claim 1, wherein the first information comprises: a transport block level HARQ-ACK feedback, and a CBG-level HARQ-ACK feedback of a transport block or a transport block group where the CBG that fails to be decoded is located, wherein the transport block group comprises one or more transport blocks. ### Claim 3 (depends on 1) The data transmission method according to claim 1, wherein at least one CBG group is formed, each CBG group comprises one or more CBGs, and in a CBG-level HARQ-ACK feedback, each bit indicates whether a CBG group is successfully decoded, wherein if any CBG in a CBG group fails to be successfully decoded, the bit indicates that the CBG group is not successfully decoded, and if all CBGs in a CBG group are successfully decoded, the bit indicates that the CBG group is successfully decoded. ### Claim 4 (depends on 1) The data transmission method according to claim 1, wherein before transmitting uplink data and associated UCI to a base station through AUL transmission, the method further comprises: performing Listen Before Talk (LBT) and succeeding in the LBT. ### Claim 5 (depends on 1) The data transmission method according to claim 1, wherein the UCI comprises HARQ-ID, New Data Indicator (NDI) and Redundancy Version IDentity (RVID) associated with the uplink data. ### Claim 6 A data transmission method, comprising: in an unlicensed frequency band of 5G New Radio (NR), transmitting uplink data and associated Uplink Control Information (UCI) to a base station through Autonomous UpLink (AUL) transmission, wherein the base station is capable of identifying a User Equipment (UE) transmitting the uplink data through UE specific Demodulation Reference Signal (DMRS); receiving Downlink Feedback Information (DFI) which comprises first information; using the first information to determine Hybrid Automatic Repeat reQuest-IDentity (HARQ-ID) of a transport block where a Code Block Group (CBG) that needs to be retransmitted is located, and a sequence number of the CBG that needs to be retransmitted in a HARQ of the transport block where the CBG that needs to be retransmitted is located; and performing scheduling-free retransmission. ### Claim 7 (depends on 6) The data transmission method according to claim 6, wherein the first information comprises: a transport block level HARQ-ACK feedback, and a CBG-level HARQ-ACK feedback of a transport block or a transport block group where the CBG that fails to be decoded is located, wherein the transport block group comprises one or more transport blocks. ### Claim 8 (depends on 6) The data transmission method according to claim 6, wherein at least one CBG group is formed, each CBG group comprises one or more CBGs, and in a CBG-level HARQ-ACK feedback, each bit indicates whether a CBG group is successfully decoded, wherein if any CBG in a CBG group fails to be successfully decoded, the bit indicates that the CBG group is not successfully decoded, and if all CBGs in a CBG group are successfully decoded, the bit indicates that the CBG group is successfully decoded. ### Claim 9 (depends on 6) The data transmission method according to claim 6, wherein before transmitting uplink data and associated UCI to a base station through AUL transmission, the method further comprises: performing Listen Before Talk (LBT) and succeeding in the LBT. ### Claim 10 (depends on 6) The data transmission method according to claim 6, wherein the UCI comprises HARQ-ID, New Data Indicator (NDI) and Redundancy Version IDentity (RVID) associated with the uplink data. ### Claim 11 A data transmission method, comprising: in an unlicensed frequency band of 5G New Radio (NR), receiving uplink data and associated Uplink Control Information (UCI) from a User Equipment (UE) through Autonomous UpLink (AUL) transmission; identifying the UE through UE specific Demodulation Reference Signal (DMRS); decoding the UCI; if the UCI is successfully decoded, decoding the uplink data; and based on whether a transport block or a Code Block Group (CBG) is successfully decoded, transmitting Downlink Feedback Information (DFI) to the UE, wherein the DFI comprises first information, and the UE is capable of using the first information to determine Hybrid Automatic Repeat reQuest-IDentity (HARQ-ID) of a transport block where the CBG that needs to be retransmitted is located, and a sequence number of the CBG that needs to be retransmitted in a HARQ of the transport block where the CBG that needs to be retransmitted is located. ### Claim 12 (depends on 11) The data transmission method according to claim 11, wherein the first information comprises: a transport block level HARQ-ACK feedback, and a CBG-level HARQ-ACK feedback of a transport block or a transport block group where the CBG that fails to be decoded is located, wherein the transport block group comprises one or more transport blocks. ### Claim 13 (depends on 11) The data transmission method according to claim 11, wherein at least one CBG group is formed, each CBG group comprises one or more CBGs, and in a CBG-level HARQ-ACK feedback, each bit indicates whether a CBG group is successfully decoded, wherein if any CBG in a CBG group fails to be successfully decoded, the bit indicates that the CBG group is not successfully decoded, and if all CBGs in a CBG group are successfully decoded, the bit indicates that the CBG group is successfully decoded. ### Claim 14 (depends on 11) The data transmission method according to claim 11, wherein before transmitting the uplink data and the associated UCI to the base station through AUL transmission, the UE further performs Listen Before Talk (LBT) and succeeds in the LBT. ### Claim 15 (depends on 11) The data transmission method according to claim 11, wherein the UCI comprises HARQ-ID, New Data Indicator (NDI) and Redundancy Version IDentity (RVID) associated with the uplink data. ### Claim at position 16 16-27. (canceled)