# US 11,452,027 B2 · Activation of a secondary cells of primary and secondary control channel groups > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,452,027 B2 - Document ID: US11452027B2 - Status: Granted - Kind: B2 - Application number: 16/886,181 - Filed: 2020-05-28 - Published: 2020-09-17 - Granted: 2022-09-20 - Earliest claimed: 2015-03-16 - Assignees: Ofinno, LLC - Applicants: Ofinno, LLC - Inventors: Esmael Hejazi Dinan - Web page: https://patentgrep.com/patent/US11452027B2 ## CPC - H04W 48/08: Access restriction or access information delivery, e.g. discovery data delivery (signalling during connection H04W76/00) - H04L 5/001: {the frequencies being arranged in component carriers} - H04L 5/0057: {Physical resource allocation for CQI} - H04W 36/04: Reselecting a cell layer in multi-layered cells - H04W 72/0446: Resources in time domain, e.g. slots or frames - H04B 7/0626: {Channel coefficients, e.g. channel state information [CSI]} - H04L 5/0098: {Signalling of the activation or deactivation of component carriers, subcarriers or frequency bands} - H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal - H04W 76/38: triggered by timers - 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) - H04B: TRANSMISSION ## Abstract A base station transmits, to a wireless device, configuration parameters of a cells grouped into: a primary control channel group comprising a secondary cell; and a secondary control channel group comprising a control channel secondary cell with a secondary control channel. The base station transmits, during a first subframe, a first indication to activate the secondary cell and the control channel secondary cell. The base station starts reception of channel state information of the secondary cell of the primary control channel group from a second subframe that is eight subframes after the first subframe. The base station starts reception of channel state information of the control channel secondary cell from a third subframe that is a number of subframes after the second subframe, wherein the number is based on when the wireless device successfully detects the control channel secondary cell. ## Claims ### Claim 1 A base station comprising: one or more processors; and memory storing instructions that, when executed by the one or more processors, cause the base station to: transmit, to a wireless device, configuration parameters of cells grouped into: a primary control channel group comprising a secondary cell; and a secondary control channel group comprising a control channel secondary cell with a secondary control channel; transmit, during a first subframe, a first indication to activate the secondary cell; start reception of channel state information of the secondary cell from a second subframe that is eight subframes after the first subframe; transmit, during a third subframe, a second indication for activation of the control channel secondary cell; and start reception of channel state information for the control channel secondary cell from a fourth subframe that is a number of subframes after the third subframe, wherein the number is based on when the wireless device successfully detects the control channel secondary cell. ### Claim 2 (depends on 1) The base station of claim 1, wherein the instructions, when executed by the one or more processors, further cause the wireless device to start transmission of channel state information of a first secondary cell of the secondary control channel group from the fourth subframe, wherein a control element further indicates activation of the first secondary cell. ### Claim 3 (depends on 1) The base station of claim 1, wherein the instructions, when executed by the one or more processors, further cause the wireless device to employ a next available uplink resource for transmitting the channel state information for the control channel secondary cell if there are no uplink resources for transmitting the channel state information for the control channel secondary cell in the fourth subframe. ### Claim 4 (depends on 1) The base station of claim 1, wherein the instructions, when executed by the one or more processors, further cause the wireless device to start transmission of channel state information of an activated cell of the secondary control channel group from the fourth subframe. ### Claim 5 (depends on 1) The base station of claim 1, wherein the control channel secondary cell remains detectable during a cell activation delay. ### Claim 6 (depends on 1) The base station of claim 1, wherein the control channel secondary cell is detected on a first attempt. ### Claim 7 (depends on 1) The base station of claim 1, wherein the instructions, when executed by the one or more processors, further cause the wireless device to transmit channel state information comprising an out of range channel quality index when no valid channel state information field with a channel quality index different from zero is available. ### Claim 8 (depends on 1) The base station of claim 1, wherein the instructions, when executed by the one or more processors, further cause the wireless device to: start a first deactivation timer associated with the secondary cell in the second subframe; and start a second deactivation timer associated with the control channel secondary cell in a fifth subframe that is eight subframes after the third subframe. ### Claim 9 (depends on 8) The base station of claim 8, wherein the instructions, when executed by the one or more processors, further cause the wireless device to start transmission of channel state information of a first secondary cell of the secondary control channel group from the fourth subframe, wherein a control element further indicates activation of the first secondary cell. ### Claim 10 (depends on 9) The base station of claim 9, wherein the instructions, when executed by the one or more processors, further cause the wireless device to employ a next available uplink resource for transmitting the channel state information for the control channel secondary cell if there are no uplink resources for transmitting the channel state information for the control channel secondary cell in the fourth subframe. ### Claim 11 A base station comprising: one or more processors; and memory storing instructions that, when executed by the one or more processors, cause the base station to: transmit, to a wireless device, configuration parameters of a cells grouped into: a primary control channel group comprising a secondary cell; and a secondary control channel group comprising a control channel secondary cell with a secondary control channel; transmit, during a first subframe, a first indication to activate the secondary cell and the control channel secondary cell; start reception of channel state information of the secondary cell of the primary control channel group from a second subframe that is eight subframes after the first subframe; and start reception of channel state information of the control channel secondary cell from a third subframe that is a number of subframes after the second subframe, wherein the number is based on when the wireless device successfully detects the control channel secondary cell. ### Claim 12 (depends on 11) The base station of claim 11, wherein the instructions, when executed by the one or more processors, further cause the wireless device to start transmission of channel state information of a first secondary cell of the secondary control channel group from the third subframe, wherein a control element further indicates activation of the first secondary cell. ### Claim 13 (depends on 11) The base station of claim 11, wherein the instructions, when executed by the one or more processors, further cause the wireless device to transmit channel state information comprising an out of range channel quality index when no valid channel state information field with a channel quality index different from zero is available. ### Claim 14 (depends on 11) The base station of claim 11, wherein the instructions, when executed by the one or more processors, further cause the wireless device to start a first deactivation timer associated with the secondary cell in the second subframe. ### Claim 15 (depends on 14) The base station of claim 14, wherein the instructions, when executed by the one or more processors, further cause the wireless device to start a second deactivation timer associated with the control channel secondary cell in the second subframe. ### Claim 16 (depends on 15) The base station of claim 15, wherein the instructions, when executed by the one or more processors, further cause the wireless device to start transmission of channel state information of a first secondary cell of the secondary control channel group from the third subframe, wherein a control element further indicates activation of the first secondary cell. ### Claim 17 (depends on 16) The base station of claim 16, wherein the instructions, when executed by the one or more processors, further cause the wireless device to transmit channel state information comprising an out of range channel quality index when no valid channel state information field with a channel quality index different from zero is available. ### Claim 18 (depends on 17) The base station of claim 17, wherein the instructions, when executed by the one or more processors, further cause the wireless device to receive, during a fourth subframe, a second indication for activation of the control channel secondary cell. ### Claim 19 (depends on 18) The base station of claim 18, wherein the control channel secondary cell remains detectable during a cell activation delay. ### Claim 20 A system comprising: a wireless device; and a base station comprising: one or more processors; and memory storing instructions that, when executed by the one or more processors, cause the base station to: transmit, to the wireless device, configuration parameters of a cells grouped into: a primary control channel group comprising a secondary cell; and a secondary control channel group comprising a control channel secondary cell with a secondary control channel; transmit, during a first subframe, a first indication to activate the secondary cell and the control channel secondary cell; start reception of channel state information of the secondary cell of the primary control channel group from a second subframe that is eight subframes after the first subframe; and start reception of channel state information of the control channel secondary cell from a third subframe that is a number of subframes after the second subframe, wherein the number is based on when the wireless device successfully detects the control channel secondary cell.