# US 2019/0379518 A1 · Fast activation and deactivation for low latency communications > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0379518 A1 - Document ID: US20190379518A1 - Status: Published application - Kind: A1 - Application number: 16/432,767 - Filed: 2019-06-05 - Published: 2019-12-12 - Earliest claimed: 2018-06-08 - Assignees: QUALCOMM Incorporated - Applicants: QUALCOMM Incorporated - Inventors: Wei Yang; Jing Jiang; Linhai He; Wanshi Chen; Tingfang Ji; Peter Pui Lok Ang - Web page: https://patentgrep.com/patent/US20190379518A1 ## CPC - H04L 5/0091: {Signalling for the administration of the divided path, e.g. signalling of configuration information} - H04L 5/0098: {Signalling of the activation or deactivation of component carriers, subcarriers or frequency bands} - H04L 1/1812: Hybrid protocols; Hybrid automatic repeat request [HARQ] - H04L 5/0053: {Allocation of signalling, i.e. of overhead other than pilot signals} - H04L 5/0094: {Indication of how sub-channels of the path are allocated} - H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal - H04W 72/51: based on terminal or device properties - 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) ## Abstract Methods, systems, and devices for wireless communications are described. As described herein, a service type may be configured, activated, and utilized for subsequent communications according to the service type. For example, a user equipment (UE) may monitor a downlink control channel associated with the service type based on configuring the service type and activating the service type, receive downlink messages associated with the service type, or transmit uplink messages associated with the service type. In some cases, the service type may be activated by transmitting a medium access control (MAC) control element (CE) or a downlink control information (DCI) message. When traffic associated with the service type is no longer present, the service type may be deactivated based on a deactivation indication and/or a deactivation timer. In some cases, the service type may include an ultra-reliable low latency communication (URLLC) service or a low latency service. ## Claims ### Claim 1 A method for wireless communications at a user equipment (UE), comprising: receiving, from a base station, a configuration for a service type; receiving, from the base station, an activation indicator indicating that the UE is to begin monitoring for the service type; monitoring a downlink control channel associated with the service type based at least in part on the configuration for the service type and receipt of the activation indicator; and receiving a downlink message associated with the service type in accordance with the configuration for the service type. ### Claim 2 (depends on 1) The method of claim 1, wherein receiving the activation indicator comprises: receiving, from the base station, a medium access control (MAC) control element (CE) activating a service type mode. ### Claim 3 (depends on 2) The method of claim 2, wherein receiving the MAC CE comprises: receiving the MAC CE that includes a sub-header and an associated content field that includes the activation indicator corresponding to the service type. ### Claim 4 (depends on 3) The method of claim 3, wherein the associated content field comprises additional information for the service type, a number of activated data radio bearers, or a combination thereof. ### Claim 5 (depends on 2) The method of claim 2, wherein receiving the MAC CE comprises: receiving the MAC CE that includes a sub-header corresponding to the service type without an associated content field, wherein the sub-header is the activation indicator which triggers a state change from a service type inactive mode to a service type active mode. ### Claim 6 (depends on 1) The method of claim 1, wherein receiving the activation indicator comprises: receiving, from the base station, a downlink control information (DCI) message activating a service type mode. ### Claim 7 (depends on 6) The method of claim 6, wherein receiving the DCI message comprises: receiving a service type DCI format with the activation indicator, a combination of fields that is jointly interpreted as the activation indicator, or a combination thereof. ### Claim 8 (depends on 6) The method of claim 6, wherein receiving the DCI message comprises: monitoring the DCI message based at least in part on a configured periodicity that is greater than a periodicity for monitoring the downlink control channel associated with the service type. ### Claim 9 (depends on 8) The method of claim 8, further comprising: monitoring the DCI message using a radio network temporary identifier (RNTI) associated with the service type, wherein the DCI message is scrambled by the RNTI associated with the service type. ### Claim 10 (depends on 1) The method of claim 1, further comprising: receiving, from the base station, a deactivation indicator indicating that the UE is to stop monitoring for the service type. ### Claim 11 (depends on 10) The method of claim 10, wherein receiving the deactivation indicator comprises: receiving a medium access control (MAC) control element (CE) deactivating a service type mode, wherein the MAC CE includes: a sub-header and an associated content field that includes the deactivation indicator corresponding to the service type; a sub-header corresponding to the service type without an associated content field, the sub-header being the deactivation indicator which triggers a state change from a service type active mode to a service type inactive mode; or a combination thereof. ### Claim 12 (depends on 10) The method of claim 10, wherein receiving the deactivation indicator comprises: receiving a downlink control information (DCI) message that includes a service type DCI format with the deactivation indicator. ### Claim 13 (depends on 10) The method of claim 10, wherein receiving the deactivation indicator comprises: receiving a downlink control information (DCI) message that includes a combination of fields that is jointly interpreted as the deactivation indicator. ### Claim 14 (depends on 1) The method of claim 1, wherein receiving the activation indicator comprises: receiving additional information to update the configuration for the service type. ### Claim 15 (depends on 1) The method of claim 1, wherein receiving the configuration for the service type further comprises: receiving a value for a deactivation timer associated with the service type. ### Claim 16 (depends on 15) The method of claim 15, further comprising: initiating the deactivation timer based at least in part on receiving the activation indicator. ### Claim 17 (depends on 16) The method of claim 16, further comprising: deactivating the service type based at least in part on the deactivation timer expiring, not expecting a downlink hybrid access request (HARQ) retransmission, no data in a HARQ buffer for an uplink retransmission, no uplink data for the service type, or a combination thereof. ### Claim 18 (depends on 15) The method of claim 15, further comprising: adjusting the deactivation timer based at least in part on not receiving a service type communication associated with the service type within a scheduling occasion for the service type communication. ### Claim 19 (depends on 1) The method of claim 1, further comprising: receiving a semi-persistent scheduling (SPS) configuration for uplink and downlink communications associated with the service type; and receiving an SPS activation indicator indicating that the UE is to begin monitoring in accordance with the SPS configuration, wherein monitoring the downlink control channel associated with the service type is based at least in part on receipt of the SPS activation indicator. ### Claim 20 (depends on 1) The method of claim 1, wherein the configuration for the service type comprises parameters for a physical downlink control channel (PDCCH), a physical downlink shared channel (PDSCH), a physical uplink control channel (PUCCH), a physical uplink shared channel (PUSCH), semi-persistent scheduling (SPS), a scheduling request (SR), or a combination thereof for the service type. ### Claim 21 (depends on 1) The method of claim 1, wherein: the configuration for the service type is received via radio resource control (RRC) signaling; and the service type comprises an ultra-reliable low latency communication (URLLC) service or a low latency service. ### Claim 22 A method for wireless communications at a user equipment (UE), comprising: receiving, from a base station, a configuration for a service type; identifying uplink traffic associated with the service type; transmitting, to the base station, a scheduling request (SR) associated with the service type based at least in part on identifying the uplink traffic associated with the service type; activating a service type mode for monitoring for a grant for the service type based at least in part on transmission of the SR; monitoring a downlink channel based at least in part on the configuration for monitoring the service type; receiving, from the base station, an uplink grant for the identified uplink traffic via the downlink channel; and transmitting, to the base station, the uplink traffic associated with the service type based at least in part on receiving the uplink grant. ### Claim 23 (depends on 22) The method of claim 22, further comprising: receiving, from the base station, a deactivation indicator indicating that the UE is to stop the service type mode; and deactivating the service type mode based at least in part on receiving the deactivation indicator. ### Claim 24 (depends on 23) The method of claim 23, wherein receiving the deactivation indicator further comprises: receiving a medium access control (MAC) control element (CE) or a downlink control information (DCI) message that indicates a stop to the service type mode. ### Claim 25 (depends on 22) The method of claim 22, further comprising: activating a physical downlink control channel (PDCCH) configuration associated with the service type based at least in part on transmitting the SR; and monitoring the downlink channel based at least in part on the PDCCH configuration associated with the service type. ### Claim 26 (depends on 25) The method of claim 25, wherein the PDCCH configuration comprises at least one of a control resource set configuration and a search space configuration. ### Claim 27 (depends on 22) The method of claim 22, further comprising: receiving the uplink grant via a downlink control information (DCI) message that includes a service type DCI format. ### Claim 28 (depends on 22) The method of claim 22, wherein: the configuration for the service type is received via radio resource control (RRC) signaling; and the service type comprises an ultra-reliable low latency communication (URLLC) service or a low latency service. ### Claim 29 An apparatus for wireless communications at a user equipment (UE), comprising: a processor, memory coupled with the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to: receive, from a base station, a configuration for a service type; receive, from the base station, an activation indicator indicating that the UE is to begin monitoring for the service type; monitor a downlink control channel associated with the service type based at least in part on the configuration for the service type and receipt of the activation indicator; and receive a downlink message associated with the service type in accordance with the configuration for the service type. ### Claim 30 An apparatus for wireless communications at a user equipment (UE), comprising: a processor, memory coupled with the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to: receive, from a base station, a configuration for a service type; identify uplink traffic associated with the service type; transmit, to the base station, a scheduling request (SR) based at least in part on identifying the uplink traffic associated with the service type; activate a service type mode for monitoring for a grant for the service type based at least in part on transmission of the SR; monitor a downlink channel based at least in part on the configuration for monitoring the service type; receive, from the base station, an uplink grant for the identified uplink traffic via the downlink channel; and transmit, to the base station, the uplink traffic associated with the service type based at least in part on receiving the uplink grant.