# US 2018/0324847 A1 · Method and apparatus for triggering an active time to monitor for discontinuous reception > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2018/0324847 A1 - Document ID: US20180324847A1 - Status: Published application - Kind: A1 - Application number: 15/776,111 - Filed: 2015-11-16 - Published: 2018-11-08 - Earliest claimed: 2015-11-16 - Assignees: Nokia Technologies Oy - Applicants: Nokia Technologies Oy - Inventors: Petteri LUNDEN; Esa MALKAMAKI; Elena VIRTEJ; Chunli WU - Web page: https://patentgrep.com/patent/US20180324847A1 ## CPC - H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal - H04W 76/27: Transitions between radio resource control [RRC] states - H04W 76/28: Discontinuous transmission [DTX]; Discontinuous reception [DRX] - H04W 28/0278: {using buffer status reports (dynamic wireless traffic scheduling definition H04W72/12)} - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract A method and apparatus may include transmitting uplink communication via an uplink semi-persistent scheduling resource. The method may also include monitoring a control channel for downlink communication. The monitoring comprises monitoring for discontinuous reception. The monitoring is triggered by the transmitting of the uplink communication. ## Claims ### Claim 1 A method, comprising: transmitting, by a user device, uplink communication via an uplink semi-persistent scheduling resource; and monitoring a control channel for downlink communication, wherein the monitoring comprises monitoring for discontinuous reception, and the monitoring is triggered by the transmitting of the uplink communication. ### Claim 2 (depends on 1) The method according to claim 1, wherein the monitoring comprises monitoring a physical downlink control channel ### Claim 3 (depends on 1) The method of claim 1, wherein the monitoring may happen outside DRX on-duration period. ### Claim 4 (depends on 1) The method according to claim 1, wherein the transmitting the uplink communication comprises at least one of: transmitting using an uplink semi-persistent scheduling grant; or transmitting regardless of whether the user device is in active time or not. ### Claim 5 (depends on 1) The method according to claim 1, wherein the monitoring comprises at least one of: monitoring the control channel for a determined first time period, and the first time period is configured via radio-resource control signalling. ### Claim 6 (depends on 1) The method according to claim 1, wherein the monitoring comprises monitoring the control channel after a determined second time period has elapsed after transmission of the uplink semi-persistent scheduling resource. ### Claim 7 (depends on 1) The method according to claim 1, wherein whether to monitor the control channel for the determined period upon transmitting using an uplink semi-persistent scheduling grant is configured via radio-resource control signaling. ### Claim 8 An apparatus, comprising: at least one processor; and at least one memory including computer program code, the at least one memory and the computer program code configured, with the at least one processor, to cause the apparatus at least to transmit uplink communication via an uplink semi-persistent scheduling resource; and monitor a control channel for downlink communication, wherein the monitoring comprises monitoring for discontinuous reception, and the monitoring is triggered by the transmitting of the uplink communication. ### Claim 9 (depends on 8) The apparatus according to claim 8, wherein the monitoring comprises monitoring a physical downlink control channel. ### Claim 10 (depends on 8) The apparatus according to claim 8, wherein the monitoring may happen outside DRX on-duration period. ### Claim 11 (depends on 8) The apparatus according to claim 8, wherein the transmitting the uplink communication comprises at least one of: transmitting using an uplink semi-persistent scheduling grant; or transmitting regardless of whether the user device is in active time or not. ### Claim 12 (depends on 8) The apparatus according to claim 8, wherein the monitoring comprises at least one of: monitoring the control channel for a determined first time period, and the first time period is configured via radio-resource control signalling. ### Claim 13 (depends on 8) The apparatus according to claim 8, wherein the monitoring comprises monitoring the control channel after a determined second time period has elapsed after transmission of the uplink semi-persistent scheduling resource. ### Claim 14 (depends on 8) The apparatus according to claim 8, wherein whether to monitor the control channel for the determined period upon transmitting using an uplink semi-persistent scheduling grant is configured via radio-resource control signaling. ### Claim at position 15 15-20. (canceled) ### Claim 21 An apparatus, comprising: at least one processor; and at least one memory including computer program code, the at least one memory and the computer program code configured, with the at least one processor, to cause the apparatus at least to receive uplink communication via an uplink semi-persistent scheduling resource from a user equipment; and transmit downlink communication on a control channel to the user equipment, wherein the control channel is monitored by the user equipment for discontinuous reception, and the transmitting is triggered by the receiving of the uplink communication. ### Claim 22 (depends on 21) The apparatus according to claim 21, wherein the transmitting comprises transmitting downlink communication on a physical downlink control channel ### Claim 23 (depends on 21) The apparatus according to claim 21, wherein the transmitting may happen outside DRX on-duration period. ### Claim 24 (depends on 21) The apparatus according to claim 21, wherein the receiving the uplink communication comprises receiving via an uplink semi-persistent scheduling grant. ### Claim 25 (depends on 21) The apparatus according to claim 21, wherein the receiving the uplink communication comprises receiving via an uplink semi-persistent scheduling grant, and the uplink semi-persistent scheduling grant has a periodicity of 1 transmission time interval. ### Claim 26 (canceled) ### Claim 27 (depends on 21) The apparatus according to claim 21, wherein the uplink communication comprises transmitting regardless of whether the user device is in active time or not.