# US 2019/0165892 A1 · Communication method, apparatus, and system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0165892 A1 - Document ID: US20190165892A1 - Status: Published application - Kind: A1 - Application number: 16/265,578 - Filed: 2019-02-01 - Published: 2019-05-30 - Earliest claimed: 2016-08-05 - Assignees: Huawei Technologies Co., Ltd. - Applicants: Huawei Technologies Co., Ltd. - Inventors: Xinqian XIE; Zhiheng GUO; Xingqing CHENG - Web page: https://patentgrep.com/patent/US20190165892A1 ## CPC - H04L 1/1607: Details of the supervisory signal - H04L 1/12: by using return channel - H04L 1/1664: {the supervisory signal being transmitted together with payload signals; piggybacking} - H04L 1/1671: {the supervisory signal being transmitted together with control information} - H04L 5/0055: {Physical resource allocation for ACK/NACK (for physical mapping arrangements in ARQ protocols H04L1/1861)} - H04W 72/04: Wireless resource allocation - H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal - H04L 1/188: {Time-out mechanisms} - H04W 88/02: Terminal devices - H04W 88/08: Access point devices - 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 The present disclosure discloses a communication method, an apparatus, and a system. The communication method includes: receiving, by a base station, uplink data sent by a terminal device; decoding the uplink data; and sending, by the base station, feedback information of the uplink data. The feedback information is used to indicate a decoding status of the uplink data, and carries information about an identifier. The identifier includes an identity of the terminal device or an identifier of the uplink data. In this way, the terminal device is prevented from receiving incorrect feedback information during conflicting transmission. ## Claims ### Claim 1 A communication method, comprising: receiving, by a base station, uplink data sent by a terminal device; decoding, by the base station, the uplink data; and when the base station correctly decodes the uplink data, sending, by the base station, feedback information of the uplink data for indicating a decoding status of the uplink data, wherein the feedback information carries information about an identifier comprising an identity of the terminal device or an identifier of the uplink data. ### Claim 2 (depends on 1) The method according to claim 1, wherein the feedback information is scrambled by using the identifier, or the feedback information comprises the identifier. ### Claim 3 (depends on 1) The method according to claim 1, wherein when the base station correctly decodes the uplink data, the feedback information comprises an acknowledgement (ACK). ### Claim 4 (depends on 1) The method according to claim 1, wherein before sending, by the base station, feedback information of the uplink data, the method further comprises: determining, by the base station, the uplink data is correctly or incorrectly decoded. ### Claim 5 (depends on 1) The method according to claim 1, further comprising: when the base station incorrectly decodes the uplink data, the base station does not send the feedback information of the uplink data. ### Claim 6 (depends on 1) The method according to claim 1, wherein sending, by the base station, feedback information of the uplink data comprises: sending, by the base station, the feedback information by using a downlink control channel or a downlink data channel. ### Claim 7 (depends on 1) The method according to claim 1, wherein before sending, by the base station, feedback information of the uplink data, the method further comprises: sending, by the base station, indication information of the feedback information for indicating a downlink resource used for transmitting the feedback information. ### Claim 8 A base station, comprising: a receiver, configured to receive uplink data sent by a terminal device; a processor, configured to decode the uplink data; and a transmitter configured to: when the processor correctly decodes the uplink data, send feedback information of the uplink data for indicating a decoding status of the uplink data, wherein the feedback information carries information about an identifier comprising an identity of the terminal device or an identifier of the uplink data. ### Claim 9 (depends on 8) The base station according to claim 8, wherein the processor is further configured to: scramble the feedback information using the identifier; or send the feedback information including the identifier. ### Claim 10 (depends on 8) The base station according to claim 8, wherein when the processor correctly decodes the uplink data, the feedback information comprises an acknowledgement (ACK). ### Claim 11 (depends on 8) The base station according to claim 8, wherein the processor is configured to: before the transmitter sends the feedback information of the uplink data, determine that the uplink data is correctly or incorrectly decoded. ### Claim 12 (depends on 8) The base station according to claim 8, wherein when the processor incorrectly decodes the uplink data, the transmitter is configured to not send the feedback information of the uplink data. ### Claim 13 (depends on 8) The base station according to claim 8, wherein the transmitter is configured to send the feedback information of the uplink data by using a downlink control channel or a downlink data channel. ### Claim 14 (depends on 8) The base station according to claim 8, wherein the transmitter is configured to: before the transmitter sends the feedback information of the uplink data, send indication information of the feedback information for indicating a downlink resource used for transmitting the feedback information. ### Claim 15 A terminal device, comprising: a transmitter, configured to send uplink data to a base station; a receiver, configured to receive feedback information of the uplink data, wherein the feedback information carries information about an identifier comprising an identity of the terminal device or an identifier of the uplink data; and a processor, configured to determine, based on the feedback information, a status of decoding of the uplink data performed by the base station. ### Claim 16 (depends on 15) The terminal device according to claim 15, wherein: the feedback information is scrambled by using the identifier, and to determine, based on the feedback information, a status of decoding of the uplink data performed by the base station, the processor is configured to descramble the feedback information by using the identifier; when the descrambled feedback information comprises an acknowledgement (ACK), determine that the base station correctly decodes the uplink data; and when the descrambled feedback information comprises a negative acknowledgement (NACK), determine that the base station incorrectly decodes the uplink data. ### Claim 17 (depends on 15) The terminal device according to claim 15, wherein: the feedback information carries comprises the identifier; and to determine, based on the feedback information, a status of decoding of the uplink data performed by the base station, the processor is configured to: when the processor identifies the identifier, determine that the base station correctly or incorrectly decodes the uplink data; or when the processor identifies the identifier and the feedback information further comprises an acknowledgement (ACK), determine that the base station correctly decodes the uplink data; or when the processor identifies the identifier and the feedback information further comprises a negative acknowledgement (NACK), determine that the base station incorrectly decodes the uplink data. ### Claim 18 (depends on 15) The terminal device according to claim 15, wherein to receive the feedback information of the uplink data, the receiver is configured to: receive the feedback information of the uplink data by using a downlink control channel or a downlink data channel. ### Claim 19 (depends on 15) The terminal device according to claim 15, wherein: the receiver is further configured to: before the receiver receives the feedback information of the uplink data, receive indication information of the feedback information for indicating a downlink resource used for transmitting the feedback information; and the processor is further configured to determine the downlink resource based on the indication information of the feedback information. ### Claim 20 (depends on 19) The terminal device according to claim 19, wherein to receive the indication information of the feedback information, the receiver is configured to: receive the indication information of the feedback information by using the downlink control channel.