# US 2021/0243690 A1 · Secondary cell activation with discontinuous reception groups > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0243690 A1 - Document ID: US20210243690A1 - Status: Published application - Kind: A1 - Application number: 17/248,492 - Filed: 2021-01-27 - Published: 2021-08-05 - Earliest claimed: 2020-02-05 - Assignees: QUALCOMM Incorporated - Applicants: QUALCOMM Incorporated - Inventors: Linhai HE; Heechoon LEE - Web page: https://patentgrep.com/patent/US20210243690A1 ## CPC - H04W 52/0206: {in access points, e.g. base stations} - H04W 52/0216: {using a pre-established activity schedule, e.g. traffic indication frame} - H04W 72/20: Control channels or signalling for resource management - H04W 76/28: Discontinuous transmission [DTX]; Discontinuous reception [DRX] - H04W 76/15: Setup of multiple wireless link connections - 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 Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may determine that a secondary cell (SCell) is to be activated for the UE or switched from a dormant state to an active state, where the SCell is in a discontinuous reception (DRX) group. The UE may set a DRX state for the SCell based at least in part on determining a DRX state of other SCells in the DRX group or determining that there are no existing SCells in the DRX group. Numerous other aspects are provided. ## Claims ### Claim 1 A user equipment (UE) for wireless communication, comprising: a memory; and one or more processors operatively coupled to the memory, the memory and the one or more processors configured to: determine that a secondary cell (SCell) is to be activated for the UE or switched from a dormant state to an active state, wherein the SCell is in a discontinuous reception (DRX) group; and set a DRX state for the SCell based at least in part on determining a DRX state of other SCells in the DRX group or determining that there are no existing SCells in the DRX group. ### Claim 2 (depends on 1) The UE of claim 1, wherein the memory and the one or more processors are configured to activate monitoring of a physical downlink control channel and transmission on the SCell based at least in part on the UE entering a DRX active state. ### Claim 3 (depends on 1) The UE of claim 1, wherein the memory and the one or more processors are configured to determine, before activation of the SCell or a transition of the SCell from a dormant state to active state, that there are no other SCells in the DRX group, and set the DRX state for the SCell to immediately enter a DRX active state. ### Claim 4 (depends on 1) The UE of claim 1, wherein the memory and the one or more processors are configured to determine, before activation of the SCell or a transition of the SCell from a dormant state to active state, that other SCells of the DRX group are in a DRX active state, and set the DRX state for the SCell and the other SCells to immediately enter the DRX active state. ### Claim 5 (depends on 1) The UE of claim 1, wherein the memory and the one or more processors are configured to determine, before activation of the SCell or a transition of the SCell from a dormant state to active state, that other SCells of the DRX group are in a DRX inactive state, and set the DRX state for the SCell to the DRX inactive state with the other SCells of the DRX group. ### Claim 6 (depends on 1) The UE of claim 1, wherein the memory and the one or more processors are configured to receive an indication from a base station to enter a DRX active state immediately or set the SCell to an activation state based at least in part on an activation state of other SCells in the DRX group. ### Claim 7 (depends on 1) The UE of claim 1, wherein the memory and the one or more processors are configured to transmit an indication that the UE is capable of setting the DRX state for the SCell to immediately enter a DRX active state based at least in part on a determination that no other SCells exist for the DRX group. ### Claim 8 (depends on 1) The UE of claim 1, wherein the memory and the one or more processors are configured to determine that the SCell is in the DRX group. ### Claim 9 A base station for wireless communication, comprising: a memory; and one or more processors operatively coupled to the memory, the memory and the one or more processors configured to: determine that a secondary cell (SCell) to be activated by a user equipment (UE) is in a discontinuous reception (DRX) group or switched from a dormant state to an active state; and transmit an instruction to the UE to set a DRX state for the SCell based at least in part on determining a DRX state of other SCells in the DRX group or determining that there are no existing SCells in the DRX group. ### Claim 10 (depends on 9) The base station of claim 9, wherein the instruction instructs the UE to set the DRX state for the SCell to immediately enter a DRX active state, based at least in part on a determination that there are no other SCells in the DRX group. ### Claim 11 (depends on 9) The base station of claim 9, wherein the instruction instructs the UE to set the DRX state for the SCell and the other cells to immediately enter a DRX active state, based at least in part on a determination that other SCells of the DRX group are in an activation state. ### Claim 12 (depends on 9) The base station of claim 9, wherein the instruction instructs the UE to set the DRX state for the SCell to a DRX inactive state with the other SCells of the DRX group, based at least in part on a determination that the other SCells of the DRX group are in an inactive state. ### Claim 13 A method of wireless communication performed by a user equipment (UE), comprising: determining that a secondary cell (SCell) is to be activated for the UE or switched from a dormant state to an active state, wherein the SCell is in a discontinuous reception (DRX) group; and setting a DRX state for the SCell based at least in part on determining a DRX state of other SCells in the DRX group or determining that there are no existing SCells in the DRX group. ### Claim 14 (depends on 13) The method of claim 13, further comprising activating monitoring of a physical downlink control channel and transmission on the SCell based at least in part on the UE entering a DRX active state. ### Claim 15 (depends on 13) The method of claim 13, further comprising determining, before activation of the SCell or a transition of the SCell from a dormant state to active state, that there are no other SCells in the DRX group, and wherein setting the DRX state for the SCell includes setting the DRX state for the SCell to immediately enter a DRX active state. ### Claim 16 (depends on 13) The method of claim 13, further comprising determining, before activation of the SCell or a transition of the SCell from a dormant state to active state, that other SCells of the DRX group are in a DRX active state, and wherein setting the DRX state for the SCell includes setting the DRX state for the SCell and the other SCells to immediately enter the DRX active state. ### Claim 17 (depends on 13) The method of claim 13, further comprising determining, before activation of the SCell or a transition of the SCell from a dormant state to active state, that other SCells of the DRX group are in a DRX inactive state, and wherein setting the DRX state for the SCell includes setting the DRX state for the SCell to the DRX inactive state with the other SCells of the DRX group. ### Claim 18 (depends on 13) The method of claim 13, further comprising receiving an indication from a base station to enter a DRX active state immediately or set the SCell to an activation state based at least in part on an activation state of other SCells in the DRX group. ### Claim 19 (depends on 13) The method of claim 13, further comprising transmitting an indication that the UE is capable of setting the DRX state for the SCell to immediately enter a DRX active state based at least in part on a determination that no other SCells exist for the DRX group. ### Claim 20 (depends on 13) The method of claim 13, further comprising determining that the SCell is in the DRX group. ### Claim 21 A method of wireless communication performed by a base station, comprising: determining that a secondary cell (SCell) to be activated by a user equipment (UE) is in a discontinuous reception (DRX) group or switched from a dormant state to an active state; and transmitting an instruction to the UE to set a DRX state for the SCell based at least in part on determining a DRX state of other SCells in the DRX group or determining that there are no existing SCells in the DRX group. ### Claim 22 (depends on 21) The method of claim 21, wherein the instruction instructs the UE to set the DRX state for the SCell to immediately enter a DRX active state, based at least in part on a determination that there are no other SCells in the DRX group. ### Claim 23 (depends on 21) The method of claim 21, wherein the instruction instructs the UE to set the DRX state for the SCell and the other cells to immediately enter a DRX active state, based at least in part on a determination that other SCells of the DRX group are in an activation state. ### Claim 24 (depends on 21) The method of claim 21, wherein the instruction instructs the UE to set the DRX state for the SCell to a DRX inactive state with the other SCells of the DRX group, based at least in part on a determination that the other SCells of the DRX group are in an inactive state.