# US 2019/0357286 A1 · Data transmission method, communication device, and data transmission system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0357286 A1 - Document ID: US20190357286A1 - Status: Published application - Kind: A1 - Application number: 16/530,471 - Filed: 2019-08-02 - Published: 2019-11-21 - Earliest claimed: 2017-03-20 - Assignees: Huawei Technologies Co., Ltd. - Applicants: Huawei Technologies Co., Ltd. - Inventors: Jiyong PANG; Hongjia SU; Zhengzheng XIANG - Web page: https://patentgrep.com/patent/US20190357286A1 ## CPC - H04B 7/026: Co-operative diversity, e.g. using fixed or mobile stations as relays - H04W 76/14: Direct-mode setup - H04B 7/15542: {Selecting at relay station its transmit and receive resources (selection of wireless resources by user or terminal H04W72/02; arrangements affording multiple use of the transmission path by two-dimensional division of the resources H04L5/0003, or by allocating sub-channels H04L5/003)} - H04L 1/06: using space diversity - H04W 40/22: using selective relaying for reaching a BTS [Base Transceiver Station] or an access point - H04W 88/04: adapted for relaying to or from another terminal or user - H04B: TRANSMISSION - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract A data transmission method, a communication device, and a data transmission system are disclosed. The method includes: determining to-be-transmitted data that needs to be sent to a network side device; before an initial transmission moment of transmitting the to-be-transmitted data to the network side device arrives, sending the to-be-transmitted data to a coordinating device; receiving the to-be-transmitted data sent by the target device; obtaining transmission parameter information; and when the initial transmission moment corresponding to the to-be-transmitted data arrives, sending the received to-be-transmitted data to the network side device based on the transmission parameter information. Therefore, when the target device needs to send the to-be-transmitted data to the network side device, the coordinating device may help the target device perform initial transmission of the to-be-transmitted data, thereby increasing a success probability of initial transmission, and further improving link reliability. ## Claims ### Claim 1 A data transmission method, comprising: obtaining, by a coordinating device, transmission parameter information, wherein the transmission parameter information indicates a parameter that needs to be used by a target device to send to-be-transmitted data to a network side device; receiving, by the coordinating device, the to-be-transmitted data sent by the target device; and when an initial transmission moment corresponding to the to-be-transmitted data arrives, sending, by the coordinating device, the received to-be-transmitted data to the network side device based on the transmission parameter information. ### Claim 2 (depends on 1) The method according to claim 1, wherein the obtaining, by a coordinating device, transmission parameter information comprises: listening, by the coordinating device, to information sent by the network side device to the target device, to obtain the transmission parameter information; or receiving, by the coordinating device, the transmission parameter information sent by the target device. ### Claim 3 (depends on 1) The method according to claim 1, wherein the receiving, by the coordinating device, the to-be-transmitted data sent by the target device comprises: receiving, by the coordinating device through a D2D link between the coordinating device and the target device, the to-be-transmitted data sent by the target device. ### Claim 4 (depends on 1) The method according to claim 1, further comprising: feeding back, by the coordinating device, first indication information to the target device, wherein the first indication information indicates that the coordinating device successfully obtains the transmission parameter information and the to-be-transmitted data. ### Claim 5 (depends on 1) The method according to claim 1, further comprising: receiving, by the coordinating device, second indication information sent by the target device or the network side device, wherein the second indication information indicates that the target device requests the coordinating device to send the to-be-transmitted data to the network side device. ### Claim 6 (depends on 1) The method according to claim 1, wherein the transmission parameter information comprises at least one of time-frequency resource information, spatial domain resource information, code domain resource information, uplink pilot resource information, uplink power control information, modulation and coding scheme information, or retransmission mechanism information. ### Claim 7 A data transmission method, comprising: determining, by a target device, to-be-transmitted data that needs to be sent to a network side device; and before an initial transmission moment at which the target device sends the to-be-transmitted data to the network side device arrives, sending, by the target device, the to-be-transmitted data to a coordinating device. ### Claim 8 (depends on 7) The method according to claim 7, further comprising: when the initial transmission moment arrives, sending, by the target device, the to-be-transmitted data to the network side device based on transmission parameter information, wherein the transmission parameter information indicates a parameter that needs to be used by the target device to send the to-be-transmitted data to the network side device. ### Claim 9 (depends on 8) The method according to claim 8, further comprising: receiving, by the target device, the transmission parameter information sent by the network side device; or determining, by the target device, the transmission parameter information. ### Claim 10 (depends on 8) The method according to claim 8, further comprising: sending, by the target device, the transmission parameter information to the coordinating device before the initial transmission moment arrives. ### Claim 11 (depends on 7) The method according to claim 7, wherein sending, by the target device, the to-be-transmitted data to a coordinating device comprises: sending, by the target device, the to-be-transmitted data to the coordinating device through a D2D link between the target device and the coordinating device. ### Claim 12 (depends on 7) The method according to claim 7, further comprising: before the initial transmission moment arrives, if the target device receives no first indication information fed back by the coordinating device, retransmitting, by the target device, the to-be-transmitted data to the coordinating device and sending the transmission parameter information to the coordinating device, wherein the first indication information indicates that the coordinating device successfully obtains the transmission parameter information and the to-be-transmitted data. ### Claim 13 (depends on 7) The method according to any one of claim 7, further comprising: sending, by the target device, second indication information to the coordinating device, wherein the second indication information indicates that the target device requests the coordinating device to send the to-be-transmitted data to the network side device. ### Claim 14 (depends on 7) The method according to any one of claim 7, wherein the transmission parameter information comprises at least one of time-frequency resource information, spatial domain resource information, code domain resource information, uplink pilot resource information, uplink power control information, modulation and coding scheme information, and retransmission mechanism information. ### Claim 15 A communication device, comprising: a transceiver; wherein the transceiver is configured to obtain transmission parameter information, wherein the transmission parameter information indicates a parameter that needs to be used by a target device to send to-be-transmitted data to a network side device; wherein the transceiver is configured to receive the to-be-transmitted data sent by the target device; and wherein the transceiver is configured to send the received to-be-transmitted data to the network side device based on the transmission parameter information when an initial transmission moment corresponding to the to-be-transmitted data arrives. ### Claim 16 (depends on 15) The communication device according to claim 15, wherein the transceiver is specifically configured to listen to information sent by the network side device to the target device, to obtain the transmission parameter information; or the transceiver is specifically configured to receive the transmission parameter information sent by the target device. ### Claim 17 (depends on 15) The communication device according to claim 15, wherein the transceiver is specifically configured to receive, through a D2D link between the communication device and the target device, the to-be-transmitted data sent by the target device. ### Claim 18 A communication device, comprising: a processor and a transceiver; wherein the processor is configured to determine to-be-transmitted data that needs to be sent to a network side device; and wherein the transceiver is configured to send the to-be-transmitted data to a coordinating device before an initial transmission moment of sending the to-be-transmitted data to the network side device arrives. ### Claim 19 (depends on 18) The communication device according to claim 18, wherein the transceiver is further configured to send the to-be-transmitted data to the network side device based on transmission parameter information when the initial transmission moment arrives, wherein the transmission parameter information indicates a parameter that needs to be used by the communication device to send the to-be-transmitted data to the network side device. ### Claim 20 (depends on 18) The communication device according to claim 18, wherein the transceiver is further configured to receive the transmission parameter information sent by the network side device, or the processor is further configured to determine the transmission parameter information.