# US 2021/0345393 A1 · Message sending method, message receiving method, apparatus, and device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0345393 A1 - Document ID: US20210345393A1 - Status: Published application - Kind: A1 - Application number: 17/366,258 - Filed: 2021-07-02 - Published: 2021-11-04 - Earliest claimed: 2019-01-03 - Assignees: Huawei Technologies Co., Ltd. - Applicants: Huawei Technologies Co., Ltd. - Inventors: Lixia XUE - Web page: https://patentgrep.com/patent/US20210345393A1 ## CPC - H04W 52/0216: {using a pre-established activity schedule, e.g. traffic indication frame} - H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal - H04L 1/0053: {specially adapted for power saving} - H04L 1/0061: {Error detection codes} - H04L 1/0072: {Error control for data other than payload data, e.g. control data} - H04L 1/1812: Hybrid protocols; Hybrid automatic repeat request [HARQ] - H04L 27/2601: {Multicarrier modulation systems} - H04W 52/0229: {where the received signal is a wanted signal} - H04W 52/0235: {where the received signal is a power saving command} - H04W 52/028: {switching on or off only a part of the equipment circuit blocks} - H04W 72/0446: Resources in time domain, e.g. slots or frames - Y02D 30/70: in wireless communication networks - 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) - 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 application discloses a message sending method, a message receiving method, an apparatus, and a device. The message sending method includes: A network device sends, by using a physical downlink control channel PDCCH, DCI with s a cyclic redundancy check CRC bit, wherein the DCI is in a first DCI format or a second DCI format, wherein the DCI is used to indicate a terminal device to enter a sleep mode at a first moment. The network device receives a response message that is sent by the terminal device based on the DCI. ## Claims ### Claim 1 A message sending method, wherein the method comprises: sending, by a network device by using a physical downlink control channel PDCCH, downlink control information DCI with a cyclic redundancy check CRC bit, wherein the DCI is in a first DCI format or a second DCI format, wherein the DCI is used to indicate a terminal device to enter a sleep mode at a first moment, the first DCI format is a DCI format used to indicate a scheduling of physical downlink shared channel PDSCH, and the second DCI format is a DCI format used to indicate a scheduling of physical uplink shared channel PUSCH; and receiving, by the network device, a response message that is sent by the terminal device based on the DCI. ### Claim 2 (depends on 1) The method according to claim 1, wherein the response message comprises a hybrid automatic repeat request HARQ response; and when the DCI is in the first DCI format, the first moment is any one of the following: a start moment of an OFDM symbol next to a last orthogonal frequency division multiplexing OFDM symbol of the HARQ response sent by the terminal device; a start moment of a slot next to a slot in which the HARQ response sent by the terminal device is located; a start moment of an OFDM symbol next to a last OFDM symbol of a PDSCH received by the terminal device; or a start moment of a slot next to a slot in which a PDSCH received by the terminal device is located. ### Claim 3 (depends on 1) The method according to claim 1, wherein the response message comprises a PUSCH; and when the DCI is in the second DCI format, the first moment is any one of the following: a start moment of an OFDM symbol next to a last OFDM symbol of the PUSCH sent by the terminal device; a start moment of a slot next to a slot in which the PUSCH sent by the terminal device is located; a start moment of an OFDM symbol next to a last OFDM symbol in OFDM symbols on which at least one aperiodic channel state information reference signal CSI-RS received by the terminal device is located when transmission of the PDCCH triggers the aperiodic CSI-RS; a start moment of a slot next to a last slot in slots in which at least one aperiodic CSI-RS received by the terminal device is located when transmission of the PDCCH triggers the aperiodic CSI-RS; a start moment of an OFDM symbol next to an OFDM symbol on which the PDCCH received by the terminal device is located when transmission of the PDCCH does not trigger an aperiodic CSI-RS; or a start moment of a slot next to a slot in which the PDCCH received by the terminal device is located when transmission of the PDCCH does not trigger an aperiodic CSI-RS. ### Claim 4 (depends on 1) The method according to claim 1, wherein the CRC bit of the DCI in the first DCI format or the second DCI format is processed through go-to-sleep cell radio network temporary identifier GTS-C-RNTI scrambling, and the GTS-C-RNTI scrambling is used to indicate the terminal device to enter the sleep mode at the first moment and wake up after a first GTS duration ends. ### Claim 5 (depends on 1) The method according to claim 1, wherein the DCI in the first DCI format comprises a first PDSCH time domain resource allocation index, the first PDSCH time domain resource allocation index is used to determine a first go-to-sleep GTS duration index in a configured PDSCH time domain resource allocation list, and the first GTS duration index is used to determine a first GTS duration for the terminal device, so that the terminal device enters the sleep mode at the first moment and wakes up after the first GTS duration ends; or the DCI in the second DCI format comprises a first PUSCH time domain resource allocation index, the first PUSCH time domain resource allocation index is used to determine a first GTS duration index in a configured PUSCH time domain resource allocation list, and the first GTS duration index is used to determine a first GTS duration for the terminal device, so that the terminal device enters the sleep mode at the first moment and wakes up after the first GTS duration ends. ### Claim 6 A message receiving method, wherein the method comprises: detecting, by a terminal device, a physical downlink control channel PDCCH sent by a network device; if downlink control information DCI with a cyclic redundancy check CRC bit is found on the PDCCH through detection, entering, by the terminal device, a sleep mode at a first moment based on the DCI, wherein the DCI is in a first DCI format or a second DCI format, wherein the first DCI format is a DCI format used to indicate the scheduling of physical downlink shared channel PDSCH, and the second DCI format is a DCI format used to indicate the scheduling of physical uplink shared channel PUSCH; and sending, by the terminal device, a response message to the network device based on the DCI. ### Claim 7 (depends on 6) The method according to claim 6, wherein the response message comprises a hybrid automatic repeat request HARQ response; and when the DCI is in the first DCI format, the first moment is any one of the following: a start moment of an OFDM symbol next to a last orthogonal frequency division multiplexing OFDM symbol of the HARQ response sent by the terminal device; a start moment of a slot next to a slot in which the HARQ response sent by the terminal device is located; a start moment of an OFDM symbol next to a last OFDM symbol of a PDSCH received by the terminal device; or a start moment of a slot next to a slot in which a PDSCH received by the terminal device is located. ### Claim 8 (depends on 6) The method according to claim 6, wherein the response message comprises a PUSCH; and when the DCI is in the second DCI format, the first moment is any one of the following: a start moment of an OFDM symbol next to a last OFDM symbol of the PUSCH sent by the terminal device; a start moment of a slot next to a slot in which the PUSCH sent by the terminal device is located; a start moment of an OFDM symbol next to a last OFDM symbol in OFDM symbols on which at least one aperiodic channel state information reference signal CSI-RS received by the terminal device is located when transmission of the PDCCH triggers the aperiodic CSI-RS; a start moment of a slot next to a last slot in slots in which at least one aperiodic CSI-RS received by the terminal device is located when transmission of the PDCCH triggers the aperiodic CSI-RS; a start moment of an OFDM symbol next to an OFDM symbol on which the PDCCH received by the terminal device is located when transmission of the PDCCH does not trigger an aperiodic CSI-RS; or a start moment of a slot next to a slot in which the PDCCH received by the terminal device is located when transmission of the PDCCH does not trigger an aperiodic CSI-RS. ### Claim 9 (depends on 6) The method according to claim 6, wherein the entering, by the terminal device, a sleep mode at a first moment based on the DCI comprises: if it is detected that the CRC bit of the DCI in the first DCI format or the second DCI format is processed through go-to-sleep cell radio network temporary identifier GTS-C-RNTI scrambling, determining that the terminal device enters the sleep mode at the first moment and wakes up after a first GTS duration ends. ### Claim 10 (depends on 6) The method according to claim 6, wherein the entering, by the terminal device, a sleep mode at a first moment based on the DCI comprises: when the DCI in the first DCI format comprises a first PDSCH time domain resource allocation index, determining, by the terminal device, a first go-to-sleep GTS duration index based on the first PDSCH time domain resource allocation index and a PDSCH time domain resource allocation list, determining a first GTS duration based on the first GTS duration index, and entering the sleep mode at the first moment and waking up after the first GTS duration ends; or when the DCI in the second DCI format comprises a first PUSCH time domain resource allocation index, determining, by the terminal device, a first GTS duration index based on the first PUSCH time domain resource allocation index and a PUSCH time domain resource allocation list, determining a first GTS duration based on the first GTS duration index, and entering the sleep mode at the first moment and waking up after the first GTS duration ends. ### Claim 11 A communications apparatus, wherein the apparatus comprises: a transmitter, configured to send, by using a physical downlink control channel PDCCH, downlink control information DCI with a cyclic redundancy check CRC bit, wherein the DCI is in a first DCI format or a second DCI format, wherein the DCI is used to indicate a terminal device to enter a sleep mode at a first moment, the first DCI format is a DCI format used to indicate a scheduling of physical downlink shared channel PDSCH, and the second DCI format is a DCI format used to indicate a scheduling of physical uplink shared channel PUSCH; and a receiver, configured to receive a response message that is sent by the terminal device based on the DCI. ### Claim 12 (depends on 11) The apparatus according to claim 11, wherein the response message comprises a hybrid automatic repeat request-acknowledgement HARQ response; and when the DCI is in the first DCI format, the first moment is any one of the following: a start moment of an OFDM symbol next to a last orthogonal frequency division multiplexing OFDM symbol of the HARQ response sent by the terminal device; a start moment of a slot next to a slot in which the HARQ response sent by the terminal device is located; a start moment of an OFDM symbol next to a last OFDM symbol of a PDSCH received by the terminal device; or a start moment of a slot next to a slot in which a PDSCH received by the terminal device is located. ### Claim 13 (depends on 11) The apparatus according to claim 11, wherein the response message comprises a PUSCH; and when the DCI is in the second DCI format, the first moment is any one of the following: a start moment of an OFDM symbol next to a last OFDM symbol of the PUSCH sent by the terminal device; a start moment of a slot next to a slot in which the PUSCH sent by the terminal device is located; a start moment of an OFDM symbol next to a last OFDM symbol in OFDM symbols on which at least one aperiodic channel state information reference signal CSI-RS received by the terminal device is located when transmission of the PDCCH triggers the aperiodic CSI-RS; a start moment of a slot next to a last slot in slots in which at least one aperiodic CSI-RS received by the terminal device is located when transmission of the PDCCH triggers the aperiodic CSI-RS; a start moment of an OFDM symbol next to an OFDM symbol on which the PDCCH received by the terminal device is located when transmission of the PDCCH does not trigger an aperiodic CSI-RS; or a start moment of a slot next to a slot in which the PDCCH received by the terminal device is located when transmission of the PDCCH does not trigger an aperiodic CSI-RS. ### Claim 14 (depends on 11) The apparatus according to claim 11, wherein the CRC bit of the DCI in the first DCI format or the second DCI format is processed through go-to-sleep cell radio network temporary identifier GTS-C-RNTI scrambling, and the GTS-C-RNTI scrambling is used to indicate the terminal device to enter the sleep mode at the first moment and wake up after a first GTS duration ends. ### Claim 15 (depends on 11) The apparatus according to claim 11, wherein the DCI in the first DCI format comprises a first PDSCH time domain resource allocation index, the first PDSCH time domain resource allocation index is used to determine a first go-to-sleep GTS duration index in a configured PDSCH time domain resource allocation list, and the first GTS duration index is used to determine a first GTS duration for the terminal device, so that the terminal device enters the sleep mode at the first moment and wakes up after the first GTS duration ends; or the DCI in the second DCI format comprises a first PUSCH time domain resource allocation index, the first PUSCH time domain resource allocation index is used to determine a first GTS duration index in a configured PUSCH time domain resource allocation list, and the first GTS duration index is used to determine a first GTS duration for the terminal device, so that the terminal device enters the sleep mode at the first moment and wakes up after the first GTS duration ends. ### Claim 16 A communications apparatus, the apparatus comprises: a processor, configured to: detect a physical downlink control channel PDCCH sent by a network device; and if downlink control information DCI with a cyclic redundancy check CRC bit, wherein the DCI is in a first DCI format or a second DCI format is found on the PDCCH through detection, enter a sleep mode at a first moment based on the DCI, wherein the first DCI format is a DCI format used to indicate a scheduling of physical downlink shared channel PDSCH, and the second DCI format is a DCI format used to indicate a scheduling of physical uplink shared channel PUSCH; and a transmitter, configured to send a response message to the network device based on the DCI. ### Claim 17 (depends on 16) The apparatus according to claim 16, wherein the response message comprises a hybrid automatic repeat request HARQ response; and when the DCI is in the first DCI format, the first moment is any one of the following: a start moment of an OFDM symbol next to a last orthogonal frequency division multiplexing OFDM symbol of the HARQ response sent by the communications apparatus; a start moment of a slot next to a slot in which the HARQ response sent by the communications apparatus is located; a start moment of an OFDM symbol next to a last OFDM symbol of a PDSCH received by the communications apparatus; or a start moment of a slot next to a slot in which a PDSCH received by the communications apparatus is located. ### Claim 18 (depends on 16) The apparatus according to claim 16, wherein the response message comprises a PUSCH; and when the DCI is in the second DCI format, the first moment is any one of the following: a start moment of an OFDM symbol next to a last OFDM symbol of the PUSCH sent by the communications apparatus; a start moment of a slot next to a slot in which the PUSCH sent by the communications apparatus is located; a start moment of an OFDM symbol next to a last OFDM symbol in OFDM symbols on which at least one aperiodic channel state information reference signal CSI-RS received by the communications apparatus is located when transmission of the PDCCH triggers the aperiodic CSI-RS; a start moment of a slot next to a last slot in slots in which at least one aperiodic CSI-RS received by the communications apparatus is located when transmission of the PDCCH triggers the aperiodic CSI-RS; a start moment of an OFDM symbol next to an OFDM symbol on which the PDCCH received by the communications apparatus is located when transmission of the PDCCH does not trigger an aperiodic CSI-RS; or a first moment being a start moment of a slot next to a slot in which the PDCCH received by the communications apparatus is located when transmission of the PDCCH does not trigger an aperiodic CSI-RS. ### Claim 19 (depends on 16) The apparatus according to claim 16, wherein the processor is configured to: if it is detected that the CRC bit of the DCI in the first DCI format or the second DCI format is processed through go-to-sleep cell radio network temporary identifier GTS-C-RNTI scrambling, determine that a terminal device enters the sleep mode at the first moment and wakes up after a first GTS duration ends, wherein the apparatus is the terminal device or the apparatus is used in the terminal device. ### Claim 20 (depends on 16) The apparatus according to claim 16, wherein the processing unit is configured to: when the DCI in the first DCI format comprises a first PDSCH time domain resource allocation index, determine a first go-to-sleep GTS duration index based on the first PDSCH time domain resource allocation index and a PDSCH time domain resource allocation list, determine a first GTS duration based on the first GTS duration index, and enter the sleep mode at the first moment and wake up after the first GTS duration ends; or when the DCI in the second DCI format comprises a first PUSCH time domain resource allocation index, determine a first GTS duration index based on the first PUSCH time domain resource allocation index and a PUSCH time domain resource allocation list, determine a first GTS duration based on the first GTS duration index, and enter the sleep mode at the first moment and wake up after the first GTS duration ends.