# US 11,444,737 B2 · Communication method and device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,444,737 B2 - Document ID: US11444737B2 - Status: Granted - Kind: B2 - Application number: 16/719,413 - Filed: 2019-12-18 - Published: 2020-05-07 - Granted: 2022-09-13 - Earliest claimed: 2017-07-14 - Assignees: Huawei Technologies Co., Ltd. - Applicants: Huawei Technologies Co., Ltd. - Inventors: Yubo Yang; Peng Zhang; Xiaolei Tie - Web page: https://patentgrep.com/patent/US11444737B2 ## CPC - H04L 1/189: {Transmission or retransmission of more than one copy of a message} - H04L 5/0053: {Allocation of signalling, i.e. of overhead other than pilot signals} - H04L 1/0003: {by switching between different modulation schemes} - H04L 1/0009: {by adapting the channel coding (H04L1/1812 takes precedence)} - H04L 1/08: by repeating transmission, e.g. Verdan system {(H04L1/1858 and H04L1/189 take precedence)} - H04L 1/1812: Hybrid protocols; Hybrid automatic repeat request [HARQ] - H04L 1/1825: Adaptation of specific ARQ protocol parameters according to transmission conditions - H04L 1/1861: {Physical mapping arrangements (for ACK signaling see also H04L5/0053)} - H04L 1/1896: {ARQ related signaling} - H04L 5/0044: {Allocation of payload; Allocation of data channels, e.g. PDSCH or PUSCH} - H04L 5/0094: {Indication of how sub-channels of the path are allocated} - H04W 28/0263: {involving mapping traffic to individual bearers or channels, e.g. traffic flow template [TFT]} - H04W 72/20: Control channels or signalling for resource management - H04L 1/0016: {involving special memory structures, e.g. look-up tables} - 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 This application provides a communication method and apparatus. The method includes: implicitly indicating a quantity of time units for transmitting a data channel and a quantity of times of retransmission of the data channel by using a size of a resource for transmitting a control channel. ## Claims ### Claim 1 A method, comprising: receiving, by a terminal device from a network device, a control channel; detecting, by the terminal device, the control channel; determining, by the terminal device, a size of a resource for transmitting the control channel by the network device, wherein the control channel carries a first parameter, and the first parameter is used to control transmission of data on a data channel; determining, by the terminal device, a quantity of times of retransmission of the data channel based on mapping relationships and the size of the resource for transmitting the control channel, wherein the mapping relationships map each control channel resource size of a plurality of control channel resource sizes to a different data channel retransmission number of a plurality of data channel retransmission numbers, wherein the plurality of control channel resource sizes are positively mapped to the plurality of data channel retransmission numbers, and wherein the mapping relationships include a first mapping relationship mapping the size of the resource for transmitting the control channel to the quantity of times of retransmission of the data channel; and receiving, by the terminal device, the data channel based on the quantity of times of retransmission of the data channel. ### Claim 2 (depends on 1) The method according to claim 1, wherein the first mapping relationship is predefined, or obtained by the terminal device by receiving a radio resource control message from the network device. ### Claim 3 (depends on 1) The method according to claim 1, wherein the size of the resource for transmitting the control channel is a quantity of control channel elements used to transmit the control channel. ### Claim 4 (depends on 1) The method according to claim 1, wherein the size of the resource for transmitting the control channel is a quantity of times of retransmission of the control channel. ### Claim 5 (depends on 1) The method according to claim 1, wherein the size of the resource for transmitting the control channel is a product of a quantity of control channel elements used to transmit the control channel and a quantity of times of retransmission of the control channel. ### Claim 6 (depends on 5) The method according to claim 5, wherein the quantity of control channel elements used to transmit the control channel is greater than 1, and the control channel elements belong to at least one control resource set. ### Claim 7 (depends on 5) The method according to claim 5, wherein a quantity of times of retransmission of the control channel is a quantity of times of retransmission of the control channel in time domain. ### Claim 8 (depends on 5) The method according to claim 5, wherein a quantity of times of retransmission of the control channel is a quantity of times of retransmission of the control channel in frequency domain. ### Claim 9 (depends on 1) The method of claim 1, wherein the control channel is a physical downlink control channel (PDCCH), wherein the data channel is a physical downlink shared channel (PDSCH), and wherein the size of the resource for transmitting the control channel is a quantity of control channel elements (CCES) used for carrying the PDCCH. ### Claim 10 (depends on 1) The method of claim 1, wherein the mapping relationships further include a second mapping relationship mapping a second size of a second resource for transmitting the control channel to a second quantity of times of retransmission of the data channel, the size of the resource being smaller than the second size of the second resource, the quantity of times of retransmission of the data channel being smaller than the of the second quantity of times of retransmission of the data channel, and wherein the determining the quantity of times of retransmission of the data channel comprises: finding, by the terminal device, the first mapping relationship from the mapping relationships based on the size of the resource for transmitting the control channel; and determining, by the terminal device, the quantity of times of retransmission of the data channel in the first mapping relationship. ### Claim 11 An apparatus, comprising: a receiver, configured to: receive a control channel from a network device, wherein the control channel carries a first parameter, and the first parameter is used to control transmission of data on a data channel; and at least one processor; and a non-transitory computer-readable storage medium storing a program to be executed by the at least one processor, the program including instructions for: detecting the control channel; and determining a size of a resource for transmitting the control channel by the network device; and determining a quantity of times of retransmission of the data channel based on mapping relationships and the size of the resource for transmitting the control channel, wherein the mapping relationships map each control channel resource size of a plurality of control channel resource sizes to a different data channel retransmission number of a plurality of data channel retransmission numbers, wherein the plurality of control channel resource sizes are positively mapped to the plurality of data channel retransmission numbers, and wherein the mapping relationships include a first mapping relationship mapping the size of the resource for transmitting the control channel to the quantity of times of retransmission of the data channel; and wherein the receiver is further configured to receive the data channel based on the quantity of times of retransmission of the data channel. ### Claim 12 (depends on 11) The apparatus according to claim 11, wherein the first mapping relationship is predefined. ### Claim 13 (depends on 11) The apparatus according to claim 11, wherein the receiver is further configured to obtain the first mapping relationship by receiving a radio resource control message from the network device. ### Claim 14 (depends on 11) The apparatus according to claim 11, wherein the size of the resource for transmitting the control channel is a quantity of control channel elements used to transmit the control channel. ### Claim 15 (depends on 11) The apparatus according to claim 11, wherein the size of the resource for transmitting the control channel is a quantity of times of retransmission of the control channel. ### Claim 16 (depends on 11) The apparatus according to claim 11, wherein the size of the resource for transmitting the control channel is a product of a quantity of control channel elements used to transmit the control channel and a quantity of times of retransmission of the control channel. ### Claim 17 (depends on 16) The apparatus according to claim 16, wherein the quantity of control channel elements used to transmit the control channel is greater than 1, and the control channel elements belong to at least one control resource set. ### Claim 18 (depends on 16) The apparatus according to claim 16, wherein the quantity of times of retransmission of the control channel is a quantity of times of retransmission of the control channel in time domain, or a quantity of times of retransmission of the control channel in frequency domain. ### Claim 19 An apparatus, comprising: at least one processor; and a non-transitory computer-readable storage medium storing a program to be executed by the at least one processor, the program including instructions for: determining a size of a resource for transmitting a control channel, wherein the control channel carries a first parameter, the first parameter is used to control transmission of data on a data channel, and a first mapping relationship of mapping relationships exists between the size of the resource for transmitting the control channel and a quantity of times of retransmission of the data channel, wherein the mapping relationships map each control channel resource size of a plurality of control channel resource sizes to a different data channel retransmission number of a plurality of data channel retransmission numbers, and wherein the plurality of control channel resource sizes are positively mapped to the plurality of data channel retransmission numbers; and sending the control channel and the data channel. ### Claim 20 (depends on 19) The apparatus according to claim 19, wherein the first mapping relationship is predefined, or the program further includes instructions for notifying a terminal device of the first mapping relationship using a radio resource control message. ### Claim 21 (depends on 19) The apparatus according to claim 19, wherein the size of the resource for transmitting the control channel is a quantity of control channel elements used to transmit the control channel, or a quantity of times of retransmission of the control channel, or a product of the quantity of the control channel elements used to transmit the control channel and the quantity of times of retransmission of the control channel. ### Claim 22 (depends on 21) The apparatus according to claim 21, wherein the quantity of the control channel elements used to transmit the control channel is greater than 1, and the control channel elements belong to at least one control resource set.