# US 11,115,926 B2 · User node, a network node and methods for wireless communication > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,115,926 B2 - Document ID: US11115926B2 - Status: Granted - Kind: B2 - Application number: 16/870,567 - Filed: 2020-05-08 - Published: 2020-08-27 - Granted: 2021-09-07 - Earliest claimed: 2017-12-19 - Assignees: Huawei Technologies Co., Ltd. - Applicants: Huawei Technologies Co., Ltd. - Inventors: Oleksandr Puchko; Kari Heiska; Johan Christer Qvarfordt; Petteri Kela - Web page: https://patentgrep.com/patent/US11115926B2 ## CPC - H04W 52/0216: {using a pre-established activity schedule, e.g. traffic indication frame} - H04W 52/02: Power saving arrangements - H04W 52/0235: {where the received signal is a power saving command} - H04W 56/001: {Synchronization between nodes} - H04W 76/28: Discontinuous transmission [DTX]; Discontinuous reception [DRX] - 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) - 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 Methods, a user node and a network node are provided. The user node is configured to determine an indication of at least one wake-up latency of the user node, the at least one wake-up latency being a time period for the user node to wake-up and start to monitor a downlink channel transmitted by the network node of a wireless communication network; determine a message comprising the indication; and transmit the message to the network node. The network node is configured to receive from the user node a message, and set a wake-up offset for the user node based on the at least one wake-up latency comprised in the message, the wake-up offset being a time period between a wake-up signal transmission and a subsequent downlink channel transmission from the network node to the user node. ## Claims ### Claim 1 A user node comprising: a processor; and a memory having processor-executable instructions stored to be executed by the processor, wherein the processor-executable instructions cause the processor to: determine an indication of at least one wake-up latency of the user node, the at least one wake-up latency being a time period for the user node to wake up and start to monitor a downlink channel transmitted by a network node of a wireless communication network; select the at least one wake-up latency from a list of predefined wake-up latencies based on an actual wake-up latency of the user node, wherein the indication comprises a bit value associated with the selected wake-up latency, and wherein a bit combination of “00” indicates that the user node does not support wake-up signaling; determine a message comprising the indication; and transmit the message to the network node. ### Claim 2 (depends on 1) The user node of claim 1, wherein the at least one wake-up latency is a minimum supportable time by the user node between a reception of a wake-up signal from the network node and a subsequent reception of the downlink channel from the network node. ### Claim 3 (depends on 1) The user node of claim 1, wherein each of the at least one wake-up latency is associated with a different sleep mode type of the user node. ### Claim 4 (depends on 1) The user node of claim 1, wherein each of the at least one wake-up latency is associated with a different radio resource control state of the user node. ### Claim 5 (depends on 1) The user node of claim 1, wherein the processor is further configured to: determine an updated wake-up latency, wherein the determined updated wake-up latency is different from a previously indicated wake-up latency; and transmit to the network node an update message comprising an indication of the updated wake-up latency of the user node. ### Claim 6 (depends on 1) The user node of claim 1, wherein the processor is further configured to transmit the message in response to receiving a capability enquiry from the network node. ### Claim 7 (depends on 1) The user node of claim 1, wherein the user node is configured to receive from the network node a wake-up offset to be applied for the user node, the wake-up offset being a scheduled time between a reception of a wake-up signal and a subsequent reception of the downlink channel from the network node. ### Claim 8 A network node for a wireless communication network, the network node comprising: a processor; and a memory having processor-executable instructions stored to be executed by the processor, wherein the processor-executable instructions cause the processor to: receive from a user node a message comprising an indication of at least one wake-up latency of the user node, the at least one wake-up latency being a time period for the user node to wake up and start to monitor a downlink channel transmitted by a network node, wherein the indication comprises a bit value associated with a selected wake-up latency from a list of predefined wake-up latencies based on an actual wake-up latency of the user node, and wherein a bit combination of “00” indicates that the user node does not support wake-up signaling; and set a wake-up offset for the user node based on the at least one wake-up latency, the wake-up offset being a time period between a wake-up signal transmission and a subsequent downlink channel transmission from the network node to the user node. ### Claim 9 (depends on 8) The network node of claim 8, wherein the processor is further configured to determine category information associated with the user node and use the category information to interpret the indication. ### Claim 10 (depends on 8) The network node of claim 8, wherein the processor is further configured to: transmit the wake-up offset to the user node. ### Claim 11 A method comprising: determining, by a user node, an indication of at least one wake-up latency of the user node, the at least one wake-up latency being a time period for the user node to wake up and start to monitor a downlink channel transmitted by a network node of a wireless communication network; selecting the at least one wake-up latency from a list of predefined wake-up latencies based on an actual wake-up latency of the user node, wherein the indication comprises a bit value associated with the selected wake-up latency, and wherein a bit combination of “00” indicates that the user node does not support wake-up signaling; determining, by the user node, a message comprising the indication; and transmitting, by the user node, the message to the network node. ### Claim 12 (depends on 11) A non-transitory computer-readable storage medium having processor-executable instructions stored to be executed by a processor of a user node, wherein the processor-executable instructions cause the processor to implement the method according to claim 11. ### Claim 13 (depends on 11) The method of claim 11, wherein the at least one wake-up latency is a minimum supportable time by the user node between a reception of a wake-up signal from the network node and a subsequent reception of the downlink channel from the network node. ### Claim 14 (depends on 11) The method of claim 11, wherein each of the at least one wake-up latency is associated with a different sleep mode type of the user node. ### Claim 15 (depends on 11) The method of claim 11, wherein each of the at least one wake-up latency is associated with a different radio resource control state of the user node. ### Claim 16 A method comprising: receiving, by a network node from a user node, a message comprising an indication of at least one wake-up latency of the user node, the at least one wake-up latency being a time period for the user node to wake up and start to monitor a downlink channel transmitted by a network node; and setting, by the network node, a wake-up offset for the user node based on the at least one wake-up latency, the wake-up offset being a time between a wake-up signal transmission and a subsequent downlink channel transmission from the network node to the user node, wherein the indication comprises a bit value associated with a selected wake-up latency from a list of predefined wake-up latencies based on an actual wake-up latency of the user node, and wherein a bit combination of “00” indicates that the user node does not support wake-up signaling. ### Claim 17 (depends on 16) The method of claim 16, further comprising: determining category information associated with the user node and using the category information to interpret the indication. ### Claim 18 (depends on 16) The method of claim 16, further comprising: transmitting the wake-up offset to the user node.