# US 2026/0089554 A1 · 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 2026/0089554 A1 - Document ID: US20260089554A1 - Status: Published application - Kind: A1 - Application number: 19/399,653 - Filed: 2025-11-25 - Published: 2026-03-26 - Earliest claimed: 2023-07-24 - Assignees: Huawei Technologies Co., Ltd. - Applicants: Huawei Technologies Co., Ltd. - Inventors: Senbao Guo; Zhiying Wang; Yanqing Zhu; Chunhui Le - Web page: https://patentgrep.com/patent/US20260089554A1 ## CPC - H04W 28/0278: {using buffer status reports (dynamic wireless traffic scheduling definition H04W72/12)} - H04L 5/0094: {Indication of how sub-channels of the path are allocated} - H04W 28/02: Traffic management, e.g. flow control or congestion control - H04W 52/0235: {where the received signal is a power saving command} - H04W 52/0248: {dependent on the time of the day, e.g. according to expected transmission activity} - H04W 52/146: {Uplink power control} - H04W 72/044: based on the type of the allocated resource - H04W 72/1268: of uplink data flows - H04L 5/0048: {Allocation of pilot signals, i.e. of signals known to the receiver (allocation of control signalling H04L5/0053; use of control signalling H04L5/0091)} - H04L 5/0051: {of dedicated pilots, i.e. pilots destined for a single user or terminal} - H04W 72/21: in the uplink direction of a wireless link, i.e. towards the network - 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 and apparatus are provided. The method includes: receiving a first buffer status report (BSR) from a terminal device, where the first BSR indicates that a volume of to-be-transmitted data of the terminal device is 0; sending an uplink grant based on the first BSR, where the uplink grant indicates a first resource and a second resource; detecting a first power corresponding to the first resource; detecting a second power corresponding to the second resource, and detecting that there is a demodulation reference signal (DMRS) on the second resource; and determining, based on the first power and the second power, that the terminal device receives the uplink grant. ## Claims ### Claim 1 A method, comprising: receiving a first buffer status report (BSR) from a terminal device, wherein the first BSR indicates that a volume of to-be-transmitted data of the terminal device is 0; sending an uplink grant based on the first BSR, wherein the uplink grant indicates a first resource and a second resource; detecting a first power corresponding to the first resource; detecting a second power corresponding to the second resource, and detecting that a demodulation reference signal (DMRS) is present on the second resource; and determining, based on the first power and the second power, that the terminal device receives the uplink grant. ### Claim 2 (depends on 1) The method according to claim 1, wherein determining, based on the first power and the second power, that the terminal device receives the uplink grant comprises: determining a power difference based on the first power and the second power; and determining, based on the power difference, that the terminal device receives the uplink grant. ### Claim 3 (depends on 2) The method according to claim 2, wherein determining, based on the power difference, that the terminal device receives the uplink grant comprises: when the power difference is greater than a first threshold, determining that the terminal device receives the uplink grant. ### Claim 4 (depends on 1) The method according to claim 1, wherein the method further comprises: sending first configuration information to the terminal device, wherein the first configuration information indicates at least one of a time domain position or a frequency domain position of the DMRS in the second resource. ### Claim 5 (depends on 2) The method according to claim 2, wherein the method further comprises: sending first configuration information to the terminal device, wherein the first configuration information indicates at least one of a time domain position or a frequency domain position of the DMRS in the second resource. ### Claim 6 (depends on 3) The method according to claim 3, wherein the method further comprises: sending first configuration information to the terminal device, wherein the first configuration information indicates at least one of a time domain position or a frequency domain position of the DMRS in the second resource. ### Claim 7 An apparatus, comprising: one or more processors to execute instructions causing the apparatus to: send a first buffer status report (BSR) to a network device, wherein the first BSR indicates that a volume of to-be-transmitted data of a terminal device is 0; receive an uplink grant from the network device, wherein the uplink grant indicates a first resource and a second resource; send a demodulation reference signal (DMRS) to the network device on the second resource; and shut down a symbol or reduce a power on the first resource. ### Claim 8 (depends on 7) The apparatus according to claim 7, wherein the apparatus is further caused to: receive first configuration information from the network device, wherein the first configuration information indicates at least one of a time domain position or a frequency domain position of the DMRS in the second resource. ### Claim 9 (depends on 7) The apparatus according to claim 7, wherein the apparatus is caused to send the DMRS to the network device on the second resource comprises: in response to a quantity of received uplink grants corresponding to the first BSR indicating that the volume of to-be-transmitted data is 0 is greater than a second threshold, the apparatus is caused to send the DMRS to the network device on the second resource. ### Claim 10 (depends on 8) The apparatus according to claim 8, wherein the apparatus is caused to send the DMRS to the network device on the second resource comprises: in response to a quantity of received uplink grants corresponding to the first BSR indicating that the volume of to-be-transmitted data is 0 is greater than a second threshold, the apparatus is caused to send the DMRS to the network device on the second resource. ### Claim 11 (depends on 9) The apparatus according to claim 9, wherein the apparatus is further caused to: receive second configuration information from the network device, wherein the second configuration information indicates the second threshold. ### Claim 12 (depends on 10) The apparatus according to claim 10, wherein the apparatus is further caused to: receive second configuration information from the network device, wherein the second configuration information indicates the second threshold. ### Claim 13 A method, comprising: receiving a second buffer status report (BSR) from a terminal device, wherein the second BSR indicates that a volume of to-be-transmitted data of the terminal device is 0; sending scheduling information based on the second BSR, wherein the scheduling information comprises indication information, and the indication information indicates sending of a sounding reference signal (SRS) on a third resource; and monitoring the SRS on the third resource and determining whether the scheduling information is received. ### Claim 14 (depends on 13) The method according to claim 13, wherein monitoring the SRS on the third resource and determining whether the scheduling information is received comprises: in response to the SRS is detected on the third resource, determining that the scheduling information is received; or in response to the SRS is not detected on the third resource, determining that the scheduling information is not received.