# US 12,192,899 B2 · Transmission of wakeup signal through millimeter wave and sub-6 GHz bands > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,192,899 B2 - Document ID: US12192899B2 - Status: Granted - Kind: B2 - Application number: 16/104,014 - Filed: 2018-08-16 - Published: 2019-02-21 - Granted: 2025-01-07 - Earliest claimed: 2017-08-18 - Assignees: QUALCOMM Incorporated - Applicants: QUALCOMM Incorporated - Inventors: Muhammad Nazmul Islam; Juergen Cezanne; Ashwin Sampath; Vasanthan Raghavan - Web page: https://patentgrep.com/patent/US12192899B2 ## CPC - H04W 52/0229: {where the received signal is a wanted signal} - H04L 1/00: Arrangements for detecting or preventing errors in the information received {(correcting synchronisation H04L7/00)} - H04L 5/001: {the frequencies being arranged in component carriers} - 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 5/008: {once only, on installation} - H04L 5/0092: {Indication of how the channel is divided} - H04L 27/26: Systems using multi-frequency codes (H04L27/32 takes precedence) - H04W 52/0216: {using a pre-established activity schedule, e.g. traffic indication frame} - H04W 68/005: {Transmission of information for alerting of incoming communication} - H04W 76/28: Discontinuous transmission [DTX]; Discontinuous reception [DRX] - H04L 5/0023: {Time-frequency-space} - H04L 5/0035: {Resource allocation in a cooperative multipoint environment} - H04L 5/0055: {Physical resource allocation for ACK/NACK (for physical mapping arrangements in ARQ protocols H04L1/1861)} - H04L 5/14: Two-way operation using the same type of signal, i.e. duplex - H04W 72/046: {the resource being in the space domain, e.g. beams} - 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 Methods, systems, and devices for wireless communication are described. A base station may identify that data is available to be transmitted to a user equipment (UE) that is operating in a discontinuous reception (DRX) mode. The base station may transmit, based at least in part on the data being available, a first wakeup message using a first band supported by the UE. The base station may transmit, based at least in part on the data being available, a second wakeup message using a second band supported by the UE, the second band being different from the first band. ## Claims ### Claim 1 A method for wireless communication, comprising: identifying that data is available to be transmitted to a user equipment (UE) that is operating in a discontinuous reception (DRX) mode; transmitting, via a directional beam to the UE based at least in part on the data being available, a first wakeup message using a first band supported for reception by the UE according to a beamformed configuration; determining whether a response to the first wakeup message is received on the first band based at least in part on transmitting the first wakeup message; transmitting, via an omni-directional configuration to the UE based at least in part on determining that the response failed to be received, a second wakeup message using a second band supported for reception by the UE according to the omni-directional configuration, the second band associated with the second wakeup message being different from the first band associated with the first wakeup message; receiving a response message from the UE using the second band, the response message indicating that the UE received the second wakeup message using the second band but did not receive the first wakeup message using the first band; transmitting a set of reference signals using the first band and according to a beam sweeping configuration based at least in part on the receiving of the response message using the second band; receiving a beam recovery signal in response to the set of reference signals, the beam recovery signal comprising a beam index associated with a transmit beam from the set of reference signals; and transmitting the data that is available to the UE using the first band and according to the beam index received in the beam recovery signal. ### Claim 2 (depends on 1) The method of claim 1, further comprising: receiving a signal on the first band, the signal indicating a second beam index associated with a second transmit beam. ### Claim 3 (depends on 2) The method of claim 2, further comprising: transmitting the data that is available to the UE using the first band and according to the beam index received in the signal. ### Claim 4 (depends on 2) The method of claim 2, wherein: the signal comprises a second beam recovery signal. ### Claim 5 (depends on 1) The method of claim 1, wherein: the beam sweeping configuration is indicated to the UE through the second band or preconfigured through the first band. ### Claim 6 (depends on 1) The method of claim 1, wherein the set of reference signals comprises a channel state information reference signal (CSI-RS), a demodulation reference signal (DMRS), a tracking reference signal (TRS), a beam reference signal, a synchronization signal, or combinations thereof. ### Claim 7 (depends on 6) The method of claim 6, wherein the synchronization signal comprises a primary synchronization signal (PSS), a secondary synchronization signal (SSS), a physical broadcast channel (PBCH) signal, or combinations thereof. ### Claim 8 (depends on 1) The method of claim 1, further comprising: transmitting the second wakeup message using the second band, wherein the second wakeup message indicates the first wakeup message being transmitted using the first band; and transmitting the first wakeup message using the first band according to the second wakeup message indicating the first wakeup message being transmitted using the first band. ### Claim 9 (depends on 1) The method of claim 1, further comprising: performing a beam sweeping procedure comprising a plurality of transmit beams being transmitted in a subset of directions, the subset of directions selected according to a previous measurement report received from the UE. ### Claim 10 (depends on 1) The method of claim 1, wherein: the first band comprises a millimeter wave (mmW) radio access technology (RAT) and the second band comprises a sub-6 GHz RAT. ### Claim 11 (depends on 1) The method of claim 1, wherein: the first wakeup message comprises a physical downlink control channel (PDCCH) message, a channel state information reference signal (CSI-RS), a demodulation reference signal (DMRS), a tracking reference signal (TRS), a beam reference signal, a synchronization signal, or combinations thereof. ### Claim 12 (depends on 11) The method of claim 11, wherein: the synchronization signal comprises a primary synchronization signal (PSS), a secondary synchronization signal (SSS), a physical broadcast channel (PBCH) signal, or combinations thereof. ### Claim 13 (depends on 1) The method of claim 1, wherein: the DRX mode comprises a connected discontinuous reception (C-DRX) mode. ### Claim 14 (depends on 1) The method of claim 1, wherein the first wakeup message comprises a physical downlink control channel (PDCCH) message with cyclic redundancy check (CRC) bits scrambled using a cell radio network temporary identifier (C-RNTI) of the UE. ### Claim 15 A method for wireless communication at a user equipment (UE), comprising: monitoring, while operating in a discontinuous reception (DRX) mode, a first band for a wakeup message; determining that the wakeup message was not detected on the first band based at least in part on monitoring the first band; monitoring a second band to receive the wakeup message based at least in part on the determining, wherein the second band is different from the first band; receiving, via an omni-directional configuration and while operating in the DRX mode, the wakeup message on the second band according to the omni-directional configuration and based at least in part on monitoring the second band; receiving a plurality of beam swept signals during a beam management procedure; identifying a beam index associated with at least one of the plurality of beam swept signals, the beam index corresponding to a transmit beam meeting a threshold level; configuring a signal to indicate the beam index; identifying that data is available to be transmitted via a directional beam to the UE on the first band according to a beamformed configuration and based on the received wakeup message; and transmitting, based at least in part on the data being available, the signal. ### Claim 16 (depends on 15) The method of claim 15, further comprising: receiving the data using the first band. ### Claim 17 (depends on 16) The method of claim 16, wherein: the signal comprises a beam recovery signal. ### Claim 18 (depends on 15) The method of claim 15, further comprising: identifying a beam sweeping configuration received, wherein the plurality of beam swept signals are received according to the beam sweeping configuration. ### Claim 19 (depends on 18) The method of claim 18, wherein: the beam sweeping configuration is indicated to the UE through the second band or pre-configured through the first band. ### Claim 20 (depends on 15) The method of claim 15, wherein the plurality of beam swept signals comprises a physical downlink control channel (PDCCH) signal, a channel state information reference signal (CSI-RS), a demodulation reference signal (DMRS), a synchronization signal, or combinations thereof. ### Claim 21 (depends on 15) The method of claim 15, wherein the wakeup message comprises a physical downlink control channel (PDCCH) message with cyclic redundancy check (CRC) bits scrambled using a cell radio network temporary identifier (C-RNTI) of the UE. ### Claim 22 An apparatus for wireless communication, comprising: a processor; memory coupled with the processor; and instructions stored in the memory and operable, when executed by the processor, to cause the apparatus to: identify that data is available to be transmitted to a user equipment (UE) that is operating in a discontinuous reception (DRX) mode; transmit, via a directional beam to the UE based at least in part on the data being available, a first wakeup message using a first band supported for reception by the UE according to a beamformed configuration; determine whether a response to the first wakeup message is received on the first band based at least in part on transmitting the first wakeup message; transmit, via an omni-directional configuration to the UE based at least in part on determining that the response failed to be received, a second wakeup message using a second band supported for reception by the UE according to the omni-directional configuration, the second band associated with the second wakeup message being different from the first band associated with the first wakeup message; receive a response message from the UE using the second band, the response message indicating that the UE received the second wakeup message using the second band but did not receive the first wakeup message using the first band; transmit a set of reference signals using the first band and according to a beam sweeping configuration based at least in part on the receiving of the response message using the second band; receive a beam recovery signal in response to the set of reference signals, the beam recovery signal comprising a beam index associated with a transmit beam from the set of reference signals; and transmit the data that is available to the UE using the first band and according to the beam index received in the beam recovery signal. ### Claim 23 An apparatus for wireless communication, comprising: a processor; memory coupled with the processor; and instructions stored in the memory and operable, when executed by the processor, to cause the apparatus to: monitor, while operating in a discontinuous reception (DRX) mode at a user equipment (UE), a first band for a wakeup message; determine that the wakeup message was not detected on the first band based at least in part on monitoring the first band; monitor a second band to receive the wakeup message based at least in part on the determining, wherein the second band is different from the first band; receive, via an omni-directional configuration while operating in the DRX mode, the wakeup message on the second band according to the omni-directional configuration and based at least in part on monitoring the second band; receive a plurality of beam swept signals during a beam management procedure; identify a beam index associated with at least one of the plurality of beam swept signals, the beam index corresponding to a transmit beam meeting a threshold level; configure a signal to indicate the beam index; identify that data is available to be transmitted via a directional beam to the UE on the first band according to a beamformed configuration and based on the received wakeup message; and transmit, based at least in part on the data being available, a signal. ### Claim 24 (depends on 22) The apparatus of claim 22 wherein the instructions are further configured to cause the apparatus to: receive a signal on the first band, the signal indicating a second beam index associated with a second transmit beam. ### Claim 25 (depends on 24) The apparatus of claim 24 wherein the instructions are further configured to cause the apparatus to: transmit the data that is available to the UE using the first band and according to the beam index received in the signal. ### Claim 26 (depends on 24) The apparatus of claim 24 wherein the signal comprises a second beam recovery signal.