# US 10,873,374 B2 · Enhanced acknowledgment and power saving for wireless communications > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,873,374 B2 - Document ID: US10873374B2 - Status: Granted - Kind: B2 - Application number: 16/866,762 - Filed: 2020-05-05 - Published: 2020-11-05 - Granted: 2020-12-22 - Earliest claimed: 2017-10-24 - Assignees: Intel Corporation - Applicants: Intel Corporation - Inventors: Ilya Bolotin; Cheng Chen; Oren Kedem; Artyom Lomayev; Alexander Maltsev - Web page: https://patentgrep.com/patent/US10873374B2 ## CPC - H04B 7/0452: Multi-user MIMO systems - H04B 7/0623: {Auxiliary parameters, e.g. power control [PCB] or not acknowledged commands [NACK], used as feedback information} - H04L 1/0003: {by switching between different modulation schemes} - H04L 1/0009: {by adapting the channel coding (H04L1/1812 takes precedence)} - H04L 1/1614: {using bitmaps} - H04L 1/1621: {Group acknowledgement, i.e. the acknowledgement message defining a range of identifiers, e.g. of sequence numbers} - H04L 1/1854: {Scheduling and prioritising arrangements} - H04W 52/0225: {using monitoring of external events, e.g. the presence of a signal} - H04W 72/0446: Resources in time domain, e.g. slots or frames - H04B 7/0426: Power distribution - Y02D 30/70: in wireless communication networks - H04B: TRANSMISSION - 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) - Y02D: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE ## Abstract This disclosure describes systems, methods, and devices related to using enhanced acknowledgment and power save. A device may determine a multi-user (MU) multiple-input multiple-output (MIMO) frame associated with a MU-MIMO group. The device may determine a first portion of the MU-MIMO frame associated with the first station device of the MU-MIMO group, wherein the first portion comprises a first indication of a first time offset associated with the first station device. The device may determine a second portion of the MU-MIMO frame associated with the second station device of the MU-MIMO group, wherein the second portion comprises a second indication of a second time offset associated with the second station device. The device may cause to send the MU-MIMO frame to the MU-MIMO group. The device may identify a first acknowledgment from the first station device based on the first time offset. ## Claims ### Claim 1 A device, the device comprising processing circuitry coupled to storage, the processing circuitry configured to: determine a multi-user (MU) multiple-input multiple-output (MIMO) frame associated with a MU-MIMO group; determine a first indication included in the MU-MIMO frame, wherein the first indication is associated with a first station device of the MU-MIMO group, and wherein the first indication indicates a first time slot assigned to the first station; determine a second indication included in the MU-MIMO frame, wherein the second indication is associated with a second station device of the MU-MIMO group, and wherein the second indication indicates a second time slot assigned to the second station, wherein the first indication is different from the second indication, and wherein the first time slot is different from the second time slot, and wherein the first station device is different from the second station device; cause to send the MU-MIMO frame to the MU-MIMO group; identify a first acknowledgment from the first station device based on the first time slot; and identify a second acknowledgement from the second station device based on the second time slot. ### Claim 2 (depends on 1) The device of claim 1, wherein the first time slot is assigned to the first station to send an acknowledgment after receiving the MU-MIMO frame. ### Claim 3 (depends on 1) The device of claim 1, wherein the first acknowledgment acknowledges that the first station device received the MU-MIMO frame. ### Claim 4 (depends on 1) The device of claim 1, wherein a portion of the MU-MIMO frame comprises a third time slot associated with a time to send a second MU-MIMO frame. ### Claim 5 (depends on 1) The device of claim 1, wherein the first time slot indicates to the first station device to enter an active mode after being in a doze state. ### Claim 6 (depends on 1) The device of claim 1, wherein the first acknowledgment is associated with a minimum modulation and coding scheme. ### Claim 7 (depends on 1) The device of claim 1, wherein the second acknowledgment acknowledges that the second station device received the MU-MIMO frame. ### Claim 8 (depends on 1) The device of claim 1, further comprising a transceiver configured to transmit and receive wireless signals. ### Claim 9 (depends on 8) The device of claim 8, further comprising an antenna coupled to the transceiver to cause to send the MU-MIMO frame. ### Claim 10 A non-transitory computer-readable medium storing computer-executable instructions which when executed by one or more processors result in performing operations comprising: determining a multi-user (MU) multiple-input multiple-output (MIMO) frame associated with a MU-MIMO group; determining a first indication included in the MU-MIMO frame, wherein the first indication is associated with a first station device of the MU-MIMO group, and wherein the first indication indicates a first time slot assigned to the first station; determining a second indication included in the MU-MIMO frame, wherein the second indication is associated with a second station device of the MU-MIMO group, and wherein the second indication indicates a second time slot assigned to the second station, wherein the first indication is different from the second indication, and wherein the first time slot is different from the second time slot, and wherein the first station device is different from the second station device; causing to send the MU-MIMO frame to the MU-MIMO group; identifying a first acknowledgment from the first station device based on the first time slot; and identifying a second acknowledgement from the second station device based on the second time slot. ### Claim 11 (depends on 10) The non-transitory computer-readable medium of claim 10, wherein the first time slot is assigned to the first station to send an acknowledgment after receiving the MU-MIMO frame. ### Claim 12 (depends on 10) The non-transitory computer-readable medium of claim 10, wherein the first acknowledgment acknowledges that the first station device received the MU-MIMO frame. ### Claim 13 (depends on 10) The non-transitory computer-readable medium of claim 10, wherein a portion of the MU-MIMO frame comprises a third time slot associated with a time to send a second MU-MIMO frame. ### Claim 14 (depends on 10) The non-transitory computer-readable medium of claim 10, wherein the first time slot indicates to the first station device to enter an active mode after being in a doze state. ### Claim 15 (depends on 10) The non-transitory computer-readable medium of claim 10, wherein the first acknowledgment is associated with a minimum modulation and coding scheme. ### Claim 16 (depends on 10) The non-transitory computer-readable medium of claim 10, wherein the second acknowledgment acknowledges that the second station device received the MU-MIMO frame. ### Claim 17 A method comprising: determining, by one or more processors, a multi-user (MU) multiple-input multiple-output (MIMO) frame associated with a MU-MIMO group; determining a first indication included in the MU-MIMO frame, wherein the first indication is associated with a first station device of the MU-MIMO group, and wherein the first indication indicates a first time slot assigned to the first station; determining a second indication included in the MU-MIMO frame, wherein the second indication is associated with a second station device of the MU-MIMO group, and wherein the second indication indicates a second time slot assigned to the second station, wherein the first indication is different from the second indication, and wherein the first time slot is different from the second time slot, and wherein the first station device is different from the second station device; causing to send the MU-MIMO frame to the MU-MIMO group; identifying a first acknowledgment from the first station device based on the first time slot; and identifying a second acknowledgement from the second station device based on the second time slot. ### Claim 18 (depends on 17) The method of claim 17, wherein the first time slot is assigned to the first station to send an acknowledgment after receiving the MU-MIMO frame. ### Claim 19 (depends on 17) The method of claim 17, wherein the first acknowledgment acknowledges that the first station device received the MU-MIMO frame. ### Claim 20 (depends on 17) The method of claim 17, wherein a portion of the MU-MIMO frame comprises a third time slot associated with a time to send a second MU-MIMO frame.