# US 12,004,248 B2 · Cell configuration parameters > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,004,248 B2 - Document ID: US12004248B2 - Status: Granted - Kind: B2 - Application number: 18/078,685 - Filed: 2022-12-09 - Published: 2023-04-27 - Granted: 2024-06-04 - Earliest claimed: 2019-11-07 - Assignees: Ofinno, LLC - Applicants: Ofinno, LLC - Inventors: Taehun Kim; Esmael Hejazi Dinan; Kyungmin Park; Jinsook Ryu - Web page: https://patentgrep.com/patent/US12004248B2 ## CPC - H04W 76/15: Setup of multiple wireless link connections - H04W 48/20: Selecting an access point - H04W 76/18: Management of setup rejection or failure - H04W 76/19: Connection re-establishment - H04W 76/27: Transitions between radio resource control [RRC] states - H04W 74/0833: Random access procedures, e.g. with 4-step access - H04W 74/0836: with 2-step access - H04W 74/0838: using contention-free random access [CFRA] - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract A wireless device receives, from a first base station associated with a master cell group (MCG) comprising a primary cell (PCell), a radio resource control (RRC) message comprising secondary cell group, SCG, configuration parameters of a primary SCG cell, PSCell, of a second base station. Based on the PCell failing after receiving the SCG configuration parameters and before the SCG configuration parameters of the PSCell are applied, the wireless device performs a cell selection. In response to the selected cell being the PSCell, the wireless device synchronizes with the PSCell based on the SCG configuration parameters. ## Claims ### Claim 1 A method comprising: receiving, by a wireless device, from a first base station associated with a master cell group (MCG) comprising a primary cell (PCell), a radio resource control (RRC) message comprising secondary cell group (SCG) configuration parameters of a primary SCG cell (PSCell) of a second base station; based on a PCell failing after receiving the SCG configuration parameters and before the SCG configuration parameters of the PSCell are applied, performing a cell selection; and in response to the selected cell being the PSCell, synchronizing with the PSCell based on the SCG configuration parameters. ### Claim 2 (depends on 1) The method of claim 1, wherein the performing the cell selection comprises selecting the selected cell based on a received signal power value of the selected cell. ### Claim 3 (depends on 1) The method of claim 1, wherein the synchronizing comprises performing a random access procedure with the PSCell based on the SCG configuration parameters. ### Claim 4 (depends on 1) The method of claim 1, wherein the synchronizing does not comprise performing a random access procedure with the PSCell. ### Claim 5 (depends on 4) The method of claim 4, wherein the SCG configuration parameters comprise an indication to skip the random access procedure. ### Claim 6 (depends on 1) The method of claim 1, wherein the RRC message comprises at least one execution condition for at least one of adding or changing, by the wireless device, a current PSCell. ### Claim 7 (depends on 6) The method of claim 6, wherein the at least one execution condition is not met when the PCell fails. ### Claim 8 (depends on 1) The method of claim 1, further comprising transmitting, by the wireless device via the PSCell, a failure information message indicating the PCell failing. ### Claim 9 (depends on 1) The method of claim 1, wherein the PCell failing comprises at least one of: a radio link failure; a reconfiguration with sync failure; a mobility failure from new radio; an integrity check failure indication from a lower layer concerning signaling radio bearer 1, SRB1, or signaling radio bearer 2, SRB2; and an RRC connection reconfiguration failure. ### Claim 10 (depends on 1) The method of claim 1, wherein the PCell failing after receiving the SCG configuration parameters and before the SCG configuration parameters of the PSCell are applied comprises: the PSCell failing while a change or addition of the PSCell is ongoing. ### Claim 11 A wireless device comprising: one or more processors; and memory storing instructions that, when executed by the one or more processors, cause the wireless device to: receive, from a first base station associated with a master cell group (MCG) comprising a primary cell (PCell), a radio resource control (RRC) message comprising secondary cell group (SCG) configuration parameters of a primary SCG cell (PSCell) of a second base station; based on a PCell failing after receiving the SCG configuration parameters and before the SCG configuration parameters of the PSCell are applied, perform a cell selection; and in response to the selected cell being the PSCell, synchronize with the PSCell based on the SCG configuration parameters. ### Claim 12 (depends on 11) The wireless device of claim 11, wherein the performing the cell selection comprises selecting the selected cell based on a received signal power value of the selected cell. ### Claim 13 (depends on 11) The wireless device of claim 11, wherein the synchronizing comprises performing a random access procedure with the PSCell based on the SCG configuration parameters. ### Claim 14 (depends on 11) The wireless device of claim 11, wherein the synchronizing does not comprise performing a random access procedure with the PSCell. ### Claim 15 (depends on 11) The wireless device of claim 11, wherein the RRC message comprises at least one execution condition for at least one of adding or changing, by the wireless device, a current PSCell. ### Claim 16 (depends on 15) The wireless device of claim 15, wherein the at least one execution condition is not met when the PCell fails. ### Claim 17 (depends on 11) The wireless device of claim 11, wherein the instructions further cause the wireless device to transmit, via the PSCell, a failure information message indicating the PCell failing. ### Claim 18 (depends on 11) The wireless device of claim 11, wherein the PCell failing comprises at least one of: a radio link failure; a reconfiguration with sync failure; a mobility failure from new radio; an integrity check failure indication from a lower layer concerning signaling radio bearer 1, SRB1, or signaling radio bearer 2, SRB2; and an RRC connection reconfiguration failure. ### Claim 19 (depends on 11) The wireless device of claim 11, wherein the PCell failing after receiving the SCG configuration parameters and before the SCG configuration parameters of the PSCell are applied comprises: the PSCell failing while a change or addition of the PSCell is ongoing. ### Claim 20 A system, comprising: a wireless device comprising: one or more first processors and first memory storing first instructions that, when executed by the one or more first processors, cause the wireless device to: receive, from a first base station associated with a master cell group (MCG) comprising a primary cell (PCell), a radio resource control (RRC) message comprising secondary cell group (SCG) configuration parameters of a primary SCG cell (PSCell) of a second base station; based on a PCell failing after receiving the SCG configuration parameters and before the SCG configuration parameters of the PSCell are applied, perform a cell selection; and in response to the selected cell being the PSCell, synchronize with the PSCell based on the SCG configuration parameters; and the first base station, wherein the first base station comprises: one or more second processors and second memory storing second instructions that, when executed by the one or more second processors, cause the first base station to transmit, to the wireless device, the RRC message.